WO2017035708A1

WO2017035708A1 - Data transmission method and device, base station, and user equipment

Info

Publication number: WO2017035708A1
Application number: PCT/CN2015/088439
Authority: WO
Inventors: 曾清海; 张健
Original assignee: 华为技术有限公司
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2017-03-09
Also published as: CN107113817A

Abstract

Embodiments of the present invention provide a data transmission method and device, a base station, and a User Equipment (UE), relating to the technical field of communications. The method comprises: detecting whether an unlicensed cell changes from an unavailable state to an available state; when the unlicensed cell changes from the unavailable state to the available state, determining whether an agreed number of sending occasions for particular communication information are missed during the last time the unlicensed cell is unavailable; if yes, additionally sending the communication information to a UE via the currently available unlicensed cell. It is determined, by determining whether an agreed number of sending occasions of for particular communication information are missed during the last time an unlicensed cell is unavailable, whether to additionally send the communication information; the communication information is additionally sent if the sending occasions are missed; or otherwise, the communication information is not additionally sent. This solves the problem that a UE may miss an agreed number of receiving occasions for particular communication information when an unlicensed cell is unavailable, and avoids high system overheads caused by additional sending of the particular communication information each time a frequency resource is obtained through contention.

Description

Data transmission method, device, base station and user equipment

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, base station, and user equipment.

Background technique

With the rapid development of packet services and the rapid spread of intelligent terminals, the demand for spectrum for high-speed and large-data services is increasing. The limited availability of authorized frequency resources has caused unfavourable frequency resources to receive attention. Among them, the exempted frequency resources include frequency bands for ISM (Industrial, Scientific and Medical, industrial, scientific, and medical). The technologies commonly used in the ISM-compatible frequency bands are mainly wireless communication technologies such as WiFi (Wireless Fidelity), Bluetooth, and Zigbee. Since the above wireless communication technology provides services for users by using unlicensed frequency resources, there are defects such as low efficiency in service quality, multi-user scheduling, and limited mobility management functions, and thus LTE-A (Long Term Evolution-Advanced) LA (Licensed Assisted Access), a research project under Advanced Long Term Evolution, is studying the application of LTE-A cellular communication technology to unlicensed frequency resources. That is, the carrier on the unlicensed frequency resource is used as an unlicensed cell, and the base station performs data transmission with the UE (User Equipment) through the unlicensed cell to more effectively utilize the unlicensed frequency resource and improve the available spectrum bandwidth of the user. Users provide better service.

Since the frequency corresponding to the unlicensed cell is an unlicensed frequency, there may be cases where other devices also use the frequency resource, and therefore the base station corresponding to the unlicensed cell needs to compete for the frequency resource. At the same time, the base station has the maximum time limit for occupying the frequency resource at a time. For example, after 10 ms, the base station must release resources and re-compete resources. This means that the frequency resource of the unlicensed cell is likely to be intermittent and available in time, and the base station preempts the frequency resource, and the frequency resource is preempted by other devices. Therefore, the exempted cell is available at the time and is not available at the time. If the base station competes for the frequency resource, the unlicensed cell is in an available state; if the base station does not compete for the frequency resource, the unlicensed cell is in an unavailable state. When the unlicensed cell is in an unavailable state, the base station cannot perform transmission of data such as synchronization signals, system information, and paging messages with the UE. In the prior art, when the unlicensed cell is After the unavailable state is converted to the available state, the base station immediately sends a synchronization signal to the UE through the unlicensed cell, so that the UE can synchronize with the unlicensed cell immediately after the unlicensed cell is converted from the unavailable state to the available state.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems:

Each time the base station preempts the frequency resource, it immediately sends the synchronization signal, and does not consider whether the UE misses the reception of the synchronization signal, and sends the synchronization signal unnecessarily, which undoubtedly causes huge system overhead. For example, if the UE does not lose downlink synchronization because the unlicensed cell is unavailable, then sending the synchronization signal to the UE by the base station is not only meaningless, but also causes system overhead.

Summary of the invention

In order to solve the problem that the prior art cannot balance the data transmission in the time when the user equipment is available in the unlicensed cell, and the system overhead is reduced, and the problem is extended to the system information and the paging message, the embodiment of the present invention provides a Data transmission method, device, base station and user equipment. The technical solution is as follows:

In a first aspect, a data transmission method is provided, the method comprising:

Detecting whether the unlicensed cell is converted from an unavailable state to an available state;

Determining, when the unlicensed cell transitions from the unavailable state to the available state, whether a transmission timing of the agreed number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

If the transmission opportunity of the predetermined number of specific communication information is missed during the unavailable state of the unlicensed cell, the specific communication information is additionally sent to the UE by the unlicensed cell currently in an available state;

The sending timing and the agreed number of the specific communication information are configured in advance by the base station and the UE.

In a first possible implementation manner of the first aspect, the unlicensed cell includes at least one unlicensed channel, and the detecting whether the unlicensed cell is converted from an unavailable state to an available state includes:

Competing for frequency resources corresponding to each of the unlicensed channels;

When competing for the frequency resource corresponding to the at least one unlicensed channel, it is determined that the unlicensed cell is converted from the unavailable state to the available state.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the specific communication information is system information or a paging message, the Sending the specific communication information to the UE by using the unlicensed cell in the state, including:

When the contention-free channel is one, the specific communication information is additionally sent to the UE through the unlicensed channel;

When there are multiple unlicensed channels that are contending, one of the plurality of unlicensed channels is selected according to a configuration or an appointment rule, and the specific communication information is additionally sent to the UE by selecting an unlicensed channel.

In conjunction with the first possible implementation of the first aspect, in a third possible implementation manner of the first aspect, when the specific communication information is a synchronization signal, the exempting by the current available state The cell additionally sends the specific communication information to the UE, including:

For each of the unlicensed channels that are contending, the specific communication information is additionally transmitted to the UE through the unlicensed channel.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, when the specific communication information is a synchronization signal or system information, the determining is in an unavailable state in the unlicensed cell Whether to miss the delivery timing of a specified number of specific communication information, including:

Determine whether the information sending timer expires;

And if the information sending timer expires, determining, when the unlicensed cell is in an unavailable state, missing the sending occasion of the specified number of the specific communications information;

The information sending timer starts counting every time the specific communication information is successfully sent, and the timing period is a predetermined number of times of the sending period of the specific communication information, and the sending period is performed by the base station and the UE. Pre-configure or contract.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, when the specific communication information is a synchronization signal or system information, the determining is performed in an unavailable state in the unlicensed cell Whether to miss the delivery timing of the specified number of the specific communication information, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number;

Obtaining a second time when the last successful transmission of the specific communication information is obtained;

Calculating a time difference between the first time and the second time;

Determining whether the time difference is greater than a predetermined number of times of a transmission period of the specific communication information;

If the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, determining that the transmission timing of the predetermined number of the specific communication information is missed during the last time the unlicensed cell is in an unavailable state .

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, when the specific communication information is a paging message, the determining whether to miss the last time the unlicensed cell is in an unavailable state The timing of sending the specified number of the specific communication information includes:

Obtaining a second time when the last paging message is sent in the last available state of the unlicensed cell;

Determining, according to a pre-configured or agreed-up paging message sending occasion, whether a predetermined number of sending times of the paging message occurs in a time period from the second time to the first time;

Determining, at a time interval from the second time to the first time, a timing of sending the agreed number of the paging messages, determining that the missed status in the unauthorized state is missed The timing of the transmission of the number of the paging messages is agreed.

With reference to the first aspect, in a seventh possible implementation manner of the first aspect, when the specific communication information is a synchronization signal, the exempting cell that is currently in an available state additionally sends the specific to the UE Communication information, including:

Within one subframe after the unlicensed cell transitions from the unavailable state to the available state, the synchronization signal is additionally transmitted to the UE through the unlicensed cell currently in an available state.

With reference to the first aspect, in an eighth possible implementation manner of the first aspect, when the specific communication information is system information or a paging message, the unlicensed cell that is currently in an available state is additional to the UE. Sending the specific communication information, including:

The system information is additionally sent to the UE by the unlicensed cell currently in an available state, in a first preset time window of the unlicensed cell, and before the next time the transmission opportunity of the system information arrives; or,

When there is a paging message waiting to be sent, in the second preset time window of the unlicensed cell, and before the next transmission timing of the paging message arrives, the unlicensed cell currently in an available state is passed. Sending the paging message to the UE additionally;

Wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message sending occasion is a paging message sending occasion of the specific UE.

In conjunction with the first aspect, in a ninth possible implementation manner of the first aspect, the method further includes:

When the specific communication information is a synchronization signal or system information, after additionally transmitting the specific communication information, according to the specific communication information pre-configured or agreed by the base station and the UE, the timing is transmitted. Periodically transmitting the specific communication information through the unlicensed cell; or

When the specific communication information is a synchronization signal or system information, after additionally transmitting the specific communication information, recalculating the subsequent specific according to the time at which the specific communication information is additionally transmitted and the pre-configured or agreed-up specific communication information transmission period The timing of transmitting the communication information; periodically transmitting the specific communication information through the unlicensed cell according to the recalculated transmission opportunity.

In conjunction with the first aspect, in a tenth possible implementation manner of the first aspect, the method further includes:

And when the unlicensed cell is converted from an unavailable state to an available state, sending, by the unlicensed cell currently in an available state, an unlicensed cell available indication to the UE; or

And when the unlicensed cell is converted from an unavailable state to an available state, sending, by the other cell serving the UE, the unlicensed cell available indication to the UE;

The unlicensed cell available indication is used to instruct the UE to determine whether to receive an appointment number of the specific communication information in the process that the unlicensed cell is in an unavailable state.

In conjunction with the first aspect, in an eleventh possible implementation manner of the first aspect, the method further includes:

After the unlicensed cell is converted from the unavailable state to the available state, the communication data is sent to the UE by using the first unlicensed channel of the unlicensed cell currently in an available state, where the unlicensed cell includes one or more Unlicensed channel;

If receiving the reception failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at a time of retransmitting the communication data next time;

If the unlicensed cell is in an available state, retransmitting, by the second unlicensed channel that has contend for the frequency resource in the unlicensed cell, the communication data that is not successfully received by the UE;

If the unlicensed cell is in an unavailable state, the frequency resources corresponding to each of the unlicensed channels are respectively contending, and when competing for the frequency resource corresponding to the at least one unlicensed channel, the third unlicensed channel that has contend for the frequency resource is used. Resending the communication data that the UE did not successfully receive to the UE;

For the UE, all the unlicensed channels of the unlicensed cell share a set of HARQ (Hybrid Automatic Repeat reQuest) entities of the unlicensed cell, the first and second The third unlicensed channel is the same or a different exempted channel.

In a second aspect, a data transmission method is provided, the method comprising:

After receiving the unlicensed cell available indication sent by the base station, determining whether a receiving occasion of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

If the receiving opportunity of the specified number of the specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the specific communication information receiving operation is initiated;

Receiving, by the base station, the specific communication information that is additionally sent by the unlicensed cell that is currently in an available state;

The receiving occasion of the specific communication information is configured or agreed in advance by the base station and the UE.

In a first possible implementation manner of the second aspect, when the unlicensed cell includes multiple unlicensed channels, the unlicensed cell available indication includes indication information of an unlicensed channel in an available state.

With reference to the second aspect, in a second possible implementation manner of the second aspect, when the specific communication information is a synchronization signal or system information, the determining is in an unavailable state in the unlicensed cell Whether to miss the reception timing of a specified number of specific communication information, including:

Determine whether the information receiving timer expires;

If the information receiving timer expires, determining a receiving occasion that misses the predetermined number of the specific communication information during the last time the unlicensed cell is in an unavailable state;

The information receiving timer starts counting every time the specific communication information is successfully received, and the timing period is a multiple of a predetermined number of transmission periods of the specific communication information, and the sending period is performed by the base station and the UE. Pre-configure or contract.

With reference to the second aspect, in a third possible implementation manner of the second aspect, when the specific communication information is a synchronization signal or system information, the determining is in an unavailable state in the unlicensed cell Whether to miss the reception timing of a specified number of specific communication information, including:

Obtaining a second time when the specific communication information is successfully received last time;

Calculating a time difference between the first time and the second time;

If the time difference is greater than a predetermined number of times of the sending period of the specific communication information, determining that the number of the specified ones is missed during the last time the unlicensed cell is in an unavailable state The timing of receiving communication information.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, when the specific communication information is a paging message, the determining whether to miss the last time the unlicensed cell is in an unavailable state The timing of receiving a specified number of specific communication messages, including:

Determining, according to a preset paging message receiving occasion, whether a predetermined number of receiving occasions of the paging message occurs in the time period from the second time to the first time;

Determining, when the receiving time of the predetermined number of the paging messages occurs in the time period from the second time to the first time, determining that the unlicensed cell is in an unavailable state last time Missing the reception timing of the predetermined number of the paging messages;

Wherein, when the paging message is a paging message of the UE, the paging message sending occasion is a paging message sending occasion of the UE.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the starting the specific communications information receiving operation includes:

Searching for the specific communication information on at least one unauthorized channel of the unlicensed cell;

After searching for the specific communication information, the specific communication information is received.

With reference to the second aspect, in a sixth possible implementation manner of the second aspect, after the receiving an unlicensed cell available indication sent by the base station, the method further includes:

Receiving, by the base station, communication data sent by the unlicensed cell currently in an available state;

If the communication data fails to be received, the receiving failure indication of the communication data is fed back to the base station according to a HARQ timing relationship;

Searching for the retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to a HARQ timing relationship;

Receiving the communication data after searching the communication data;

If the communication data is successfully decoded, the reception success indication of the communication data is fed back to the base station.

In a third aspect, a data transmission apparatus is provided, the apparatus comprising:

a detecting module, configured to detect whether an unlicensed cell is converted from an unavailable state to an available state;

a judging module, configured to determine, when the unlicensed cell transitions from an unavailable state to an available state, whether a transmission timing of the specified number of specific communication information is missed during the last unavailable state of the unlicensed cell;

And an information sending module, configured to: if the sending opportunity of the specified number of specific communications information is missed during the unavailable state in the unlicensed cell, send the Specific communication information;

The sending timing and the agreed number of the specific communication information are configured or agreed in advance by the base station and the UE.

In a first possible implementation manner of the third aspect, the unlicensed cell includes at least one unlicensed channel, and the detecting module is configured to compete for frequency resources corresponding to each of the unlicensed channels respectively; when competing for at least one When the frequency resource corresponding to the channel is not authorized, it is determined that the unlicensed cell is converted from an unavailable state to an available state.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, when the specific communication information is system information or a paging message, the information sending module is configured to: When the contention-free channel is one, the specific communication information is additionally sent to the UE through the unlicensed channel; when there are multiple unlicensed channels that are contending, multiple unlicensed channels are configured according to the configuration rule. One of the unlicensed channels is selected to additionally transmit the specific communication information to the UE by selecting an unlicensed channel.

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, when the specific communication information is a synchronization signal, the information sending module is used to compete for Each of the unlicensed channels additionally transmits the specific communication information to the UE through the unlicensed channel.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, when the specific communication information is a synchronization signal or system information, the determining module is configured to determine whether the information sending timer expires; Determining, when the information sending timer expires, determining a transmission timing of missing an agreed number of the specific communication information during the last unavailable state of the unlicensed cell; wherein the information sending timer is successfully sent every time The timing is started after the specific communication information is described, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the transmission period is configured or agreed in advance by the base station and the UE.

In conjunction with the third aspect, in a fifth possible implementation of the third aspect, when the specific communication When the information is the synchronization signal or the system information, the determining module is configured to acquire a first time corresponding to the current specified frame number, where the current specified frame number is a current system frame number, a current subframe number, and the current system frame number. Combining with the current subframe number; acquiring a second time of successfully transmitting the specific communication information for the last time; calculating a time difference between the first time and the second time; determining the time difference Whether it is greater than a predetermined number of times of the transmission period of the specific communication information; if the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, determining that the unlicensed cell is unavailable at one time The transmission timing of the predetermined number of the specific communication information is missed during the state process.

With reference to the third aspect, in a sixth possible implementation manner of the third aspect, when the specific communication information is a paging message, the determining module is configured to acquire a first time corresponding to the currently specified frame number, where The current specified frame number is a combination of the current system frame number, the current subframe number, the current system frame number, and the current subframe number; and the last paging message in the process that the unlicensed cell is in the available state last time is obtained. The second time of the sending opportunity; determining, according to the pre-configured or agreed paging message sending occasion, whether a predetermined number of sending times of the paging message occur in the time period from the second time to the first time Determining, at a time interval from the second time to the first time, that a predetermined number of the paging messages are sent, determining that the unlicensed cell is in an unavailable state last time The timing of the transmission of the agreed number of the paging messages is missed.

With reference to the third aspect, in a seventh possible implementation manner of the third aspect, when the specific communication information is a synchronization signal, the information sending module is configured to convert the unlicensed cell from an unavailable state to Within one subframe after the available state, the synchronization signal is additionally transmitted to the UE through the unlicensed cell currently in an available state.

With reference to the third aspect, in an eighth possible implementation manner of the third aspect, when the specific communication information is system information or a paging message, the information sending module is configured to be used in the unlicensed cell The system information is additionally sent to the UE by the unlicensed cell currently in an available state before a predetermined time window is reached, and the next time the transmission timing of the system information arrives; or when there is a waiting for transmission When the message is called, in the second preset time window of the unlicensed cell, and before the next transmission time of the paging message arrives, the unlicensed cell currently in the available state is additionally sent to the UE. The paging message;

With reference to the third aspect, in a ninth possible implementation manner of the third aspect, the information sending module is further configured to: when the specific communication information is a synchronization signal or system information, After the communication information is determined, the specific communication information is periodically sent by the unlicensed cell according to a specific communication information transmission timing preset or agreed by the base station and the UE; or when the specific communication information is synchronized Signal or system information, after additionally transmitting the specific communication information, re-calculating the transmission timing of the subsequent specific communication information according to the time at which the specific communication information is additionally transmitted and the pre-configured or agreed-up specific communication information transmission period; The calculated transmission opportunity periodically transmits the specific communication information through the unlicensed cell.

In conjunction with the third aspect, in a tenth possible implementation manner of the third aspect, the device further includes:

An available indication sending module, configured to send an unlicensed cell available indication to the UE by the unlicensed cell currently in an available state when the unlicensed cell transitions from an unavailable state to an available state; or, when When the unlicensed cell is converted from the unavailable state to the available state, the unlicensed cell available indication is sent to the UE by other cells serving the UE; wherein the unlicensed cell available indication is used to indicate the UE Determining whether a predetermined number of reception times of the specific communication information are missed during the last time the unlicensed cell is in an unavailable state.

In conjunction with the third aspect, in an eleventh possible implementation manner of the third aspect, the device further includes:

a data sending module, configured to send, by the first unlicensed channel that is currently in an available state, communication data to the UE after the unlicensed cell is converted from an unavailable state to an available state, where the The authorized cell includes one or more unlicensed channels;

The detecting module is configured to: if receiving the receiving failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at a time of retransmitting the communication data next time;

The data sending module is configured to: if the unlicensed cell is in an available state, resend to the UE by using the second unlicensed channel that has contend for the frequency resource in the unlicensed cell that the UE is not successfully received. The communication data; if the unlicensed cell is in an unavailable state, respectively contending for the frequency resource corresponding to each of the unlicensed channels, and when competing for the frequency resource corresponding to the at least one unlicensed channel, The third grant-free channel resends the communication data that the UE did not successfully receive to the UE;

For the UE, all the unlicensed channels of the unlicensed cell share a set of HARQ entities of the unlicensed cell, and the first, second, and third unlicensed channels are the same or different exempted channels.

In a fourth aspect, a data transmission apparatus is provided, the apparatus comprising:

a judging module, configured to: after receiving an unlicensed cell available indication sent by the base station, determine whether a receiving occasion of the specified number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

And activating a module, if the receiving opportunity of the specified number of the specific communication information is missed during the unavailable state in the unlicensed cell, starting the specific communication information receiving operation;

An information receiving module, configured to receive the specific communication information that is sent by the base station by using the unlicensed cell that is currently in an available state;

The receiving occasion of the specific communication information and the agreed number are configured or agreed in advance by the base station and the UE.

In a first possible implementation manner of the fourth aspect, when the unlicensed cell includes multiple unlicensed channels, the unlicensed cell available indication includes information of an unlicensed channel in an available state.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, when the specific communication information is a synchronization signal or system information, the determining module is configured to determine whether the information receiving timer expires; Determining, by the information receiving timer, that the receiving time of the specified number of the specific communication information is missed during the last time the unlicensed cell is in an unavailable state; wherein the information receiving timer is successfully received every time The specific communication information is started, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the transmission period is configured or agreed in advance by the base station and the UE.

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, when the specific communication information is the synchronization signal or the system information, the determining module is configured to acquire the first time corresponding to the currently specified frame number. The current specified frame number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number; and a second time when the last successful reception of the specific communication information is obtained;

Calculating a time difference between the first time and the second time; determining whether the time difference is greater than a predetermined number of times of a sending period of the specific communication information; if the time difference is greater than the specific And a predetermined number of times of the transmission period of the communication information, determining the reception timing of missing the predetermined number of the specific communication information in the process that the unlicensed cell is in the unavailable state.

With reference to the fourth aspect, in a fourth possible implementation manner of the fourth aspect, when the specific communication information is a paging message, the determining module is configured to acquire a first time corresponding to the currently specified frame number, And the current specified frame number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number; and obtaining a last page in the process that the unlicensed cell is in an available state last time a second time of the message sending occasion; determining, according to the pre-configured or agreed paging message receiving occasion, whether the receiving of the agreed number of the paging messages occurs within the time period from the second time to the first time If the receiving time of the predetermined number of the paging messages occurs in the time period from the second time to the first time, determining that the unlicensed cell is unavailable in the last time The timing of receiving a predetermined number of said paging messages is missed during the process;

With reference to the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the starting module is configured to search for the specific communication information on the at least one unauthorized channel of the unlicensed cell; After the specific communication information is described, the specific communication information is received.

In conjunction with the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the device further includes:

a data receiving module, configured to receive communication data that is sent by the base station by using the unlicensed cell that is currently in an available state;

a receiving feedback module, configured to: when the receiving the communication data fails, feed back, to the base station, a reception failure indication of the communication data according to a HARQ timing relationship;

a searching module, configured to search for the retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to a HARQ timing relationship;

The data receiving module is configured to receive the communication data after searching the communication data;

The receiving feedback module is configured to feed back, to the base station, a reception success indication of the communication data if the communication data is successfully decoded.

In a fifth aspect, a base station is provided, including: a receiver, a transmitter, a memory, and a processor, wherein the receiver, the transmitter, and the memory are respectively connected to the processor, and the memory stores a program Code, the processor is used to invoke the program code, and performs the following operations:

When the unlicensed cell transitions from the unavailable state to the available state, determining whether a transmission timing of the agreed number of specific communication data is missed during the last time the unlicensed cell is in the unavailable state;

Missing the specified number of specifics during the last time the unlicensed cell is unavailable Sending the communication information, the specific communication data is additionally sent to the UE by the unlicensed cell currently in an available state;

A sixth aspect provides a user equipment, including: a receiver, a transmitter, a memory, and a processor, wherein the receiver, the transmitter, and the memory are respectively connected to the processor, and the memory stores Program code, the processor is used to call the program code, and performs the following operations:

After receiving the unlicensed cell available indication sent by the base station, determining whether a predetermined number of the specific communication information reception occasions are missed during the last time the unlicensed cell is in an unavailable state;

If the receiving opportunity of the predetermined number of the specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the specific communication information receiving operation is initiated;

Receiving, by the base station, the specific communication data that is additionally sent by the unlicensed cell that is currently in an available state;

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

When detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to additionally transmit the specific communication by determining whether the unlicensed cell is in the unavailable state or not, and whether to miss the transmission timing of the predetermined number of specific communication information. If the base station determines that the transmission timing of the predetermined number of specific communication information is missed, the specific communication information is additionally sent to the UE through the available unlicensed cell; if the base station determines that the transmission timing of the predetermined number of specific communication information is not missed, The problem that the UE may lose the downlink synchronization when the unlicensed cell is unavailable is solved, and the huge system overhead caused by the base station additionally sending the specific communication information to the UE after each competition to the unlicensed frequency resource is avoided. .

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention;

2 is a flowchart of a data transmission method according to an embodiment of the present invention;

3 is a flowchart of a data transmission method according to an embodiment of the present invention;

4 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 5 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 6 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention. Taking the perspective of the method performed by the base station as an example, referring to FIG. 1 , the method process provided by the embodiment of the present invention includes:

101. Detect whether the unlicensed cell is converted from an unavailable state to an available state. When the unlicensed cell transitions from the unavailable state to the available state, perform the following step 102.

102. When the unlicensed cell is converted from the unavailable state to the available state, determine whether the unlicensed cell is missed in the process of being unavailable, whether to miss the transmission timing of the specified number of specific communication information; if the unauthorized cell is not available at the time When the transmission timing of the predetermined number of specific communication information is missed during the state, the following step 103 is performed.

The sending timing and the number of appointments of the specific communication information are configured or agreed in advance by the base station and the UE.

103. If the transmission opportunity of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the specific communication information is additionally sent to the UE by the unlicensed cell currently in the available state.

Wherein, the agreed number is an integer greater than 1 or equal to 1. Additional communication information can be sent to the UE in the following manner:

When the specific communication information is a synchronization signal, in one subframe after the unlicensed cell is converted from the unavailable state to the available state, the extra-originating cell currently in the available state starts to be additionally sent to the UE. Synchronization signal

When the specific communication information is system information, the system information is additionally sent to the UE through the unlicensed cell currently in the available state in the first preset time window of the unlicensed cell, and before the next transmission timing of the system information arrives; When the specific communication information is a paging message and there is a paging message waiting to be sent, in the second preset time window of the unlicensed cell, and before the sending timing of the next paging message arrives, the current available state is exempted. The authorized cell sends an additional paging message to the UE; wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message sending occasion is a paging message sending occasion of the specific UE.

The method provided by the embodiment of the present invention, when detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission of the agreed number of specific communication information in the process that the unlicensed cell is in the unavailable state at one time. Timing to decide whether to send specific communication information additionally; if the base station determines that the transmission timing of the specified number of specific communication information is missed, the specific communication information is additionally sent to the UE through the available unlicensed cell; if the base station determines that the number of appointments has not been missed When the specific communication information is sent, the specific communication information is not additionally transmitted, and the problem that the UE may lose the downlink synchronization when the unlicensed cell is unavailable is solved, and the base station is prevented from additionally transmitting to the UE every time after competing for the unlicensed frequency resource. The huge system overhead caused by specific communication information.

Optionally, the unlicensed cell includes an agreed number of unlicensed channels, and detecting whether the unlicensed cell is converted from an unavailable state to an available state, including:

Optionally, when the specific communication information is the system information or the paging message, the specific communication information is additionally sent to the UE by the unlicensed cell that is currently in the available state, including:

When the contention-free channel is one, the specific communication information is additionally sent to the UE through the unlicensed channel; when there are multiple unlicensed channels that are contending, the multiple exempted channels are selected according to the configuration rule or convention. The authorization channel additionally transmits specific communication information to the UE by selecting an unlicensed channel.

Optionally, when the specific communication information is a synchronization signal, the specific communication information is additionally sent to the UE by the unlicensed cell that is currently in an available state, including: sending, for each unlicensed channel that is contending, to the UE through the unlicensed channel. Specific communication information.

Optionally, when the specific communication information is the synchronization signal or the system information, determine whether the transmission time of the agreed number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the packet include:

Determine whether the information sending timer expires;

If the information sending timer expires, determining a sending occasion that misses the predetermined number of specific communication information during the last time the unlicensed cell is in an unavailable state;

The information sending timer starts timing after each successful sending of the specific communication information, and the timing period is a predetermined number of times of the sending period of the specific communication information, and the sending period is configured or agreed in advance by the base station and the UE.

Optionally, when the specific communication information is the synchronization signal or the system information, determining whether to send the appointment number of the specific number of the specific communication information in the process that the unlicensed cell is in the unavailable state, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number, a current subframe number, a current system frame number, and a current subframe number;

Obtain the second time when the last successful transmission of specific communication information is obtained;

Calculating a time difference between the first time and the second time;

Determining whether the time difference is greater than a predetermined number of times of the transmission period of the specific communication information;

If the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, it is determined that the transmission timing of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state.

Optionally, when the specific communication information is a paging message, determining whether to transmit the scheduled number of specific communication information in the process that the unlicensed cell is in the unavailable state, including:

Determining, according to a pre-configured or agreed-up paging message sending occasion, whether a predetermined number of paging messages are sent in a time period from the second time to the first time;

The sending timing of the agreed number of paging messages occurs during the time period from the second time to the first time, and then the sending timing of the missed number of paging messages is missed during the unavailable state of the unlicensed cell.

Optionally, when the specific communication information is a synchronization signal, the specific communication information is additionally sent to the UE by the unlicensed cell that is currently in an available state, including:

Within one subframe after the unlicensed cell is converted from the unavailable state to the available state, it begins to pass through The unlicensed cell that was previously in an available state additionally transmits a synchronization signal to the UE.

In the first preset time window of the unlicensed cell, and before the next transmission timing of the system information arrives, the system information is additionally sent to the UE through the unlicensed cell currently in the available state; or

When there is a paging message waiting to be sent, in the second preset time window of the unlicensed cell, and before the sending timing of the next paging message arrives, the paging is additionally sent to the UE by the unauthorized cell currently in the available state. Message

When the paging message waiting to be sent is a paging message of a specific UE, the paging message transmission timing is a paging message transmission timing of the specific UE.

Optionally, the method further includes:

When the specific communication information is the synchronization signal or the system information, after the specific communication information is additionally transmitted, the specific communication information is periodically sent through the unlicensed cell according to the specific communication information transmission timing preset or agreed by the base station and the UE; or, when When the specific communication information is the synchronization signal or the system information, after additionally transmitting the specific communication information, re-calculating the transmission timing of the subsequent specific communication information according to the timing of additionally transmitting the specific communication information and the pre-configured or agreed-up specific communication information transmission period; The recalculated transmission opportunity periodically transmits specific communication information through the unlicensed cell.

Optionally, the method further includes:

When the unlicensed cell is converted from the unavailable state to the available state, the unlicensed cell currently in the available state is sent an unlicensed cell available indication to the UE; or

When the unlicensed cell is converted from the unavailable state to the available state, the other cell serving the UE is sent an unlicensed cell available indication to the UE;

The unlicensed cell available indication is used to indicate to the UE whether to determine whether the unrecognized cell is in the unavailable state or not, and whether the subscription number of the specific communication information is missed.

Optionally, the method further includes:

After the unlicensed cell transitions from the unavailable state to the available state, the communication data is sent to the UE by using the first unlicensed channel of the unlicensed cell currently in the available state, and the unlicensed cell includes one or more unlicensed channels;

If receiving the reception failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at the time of retransmitting the communication data next time;

If the unlicensed cell is in an available state, the first part of the unlicensed cell that has competed for the frequency resource The second grant channel resends the communication data that the UE does not successfully receive to the UE;

If the unlicensed cell is in the unavailable state last time, it competes for the frequency resource corresponding to each of the unlicensed channels, and when competing for the frequency resource corresponding to the at least one unlicensed channel, passes the third unlicensed channel that has contend for the frequency resource. Resending communication data that the UE did not successfully receive to the UE;

All of the above optional technical solutions may be used in any combination to form an optional embodiment of the present invention, and will not be further described herein.

FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present invention. Taking the perspective of the UE performing the method as an example, referring to FIG. 2, the method process provided by the embodiment of the present invention includes:

After receiving the unlicensed cell available indication sent by the base station, determining whether the unrecognized cell is in the unavailable state, whether to miss the receiving occasion of the specified number of specific communication information; if the unlicensed cell is unavailable at the time The following step 202 is performed when the reception timing of the predetermined number of specific communication information is missed during the state process.

202. If the receiving opportunity of the specified number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the specific communication information receiving operation is initiated.

203. Receive specific communication information that is sent by the base station by using an unlicensed cell that is currently in an available state.

The method provided by the embodiment of the present invention, after the UE receives the available indication of the unlicensed cell, and learns that the unlicensed cell transitions from the unavailable state to the available state, the UE determines whether to miss the reception of the specified number of specific communication information by using the same method as the base station. If the UE determines that the reception timing of the predetermined number of specific communication information is missed, the receiving operation of the specific communication information is initiated; if the UE determines that the receiving timing of the predetermined number of specific communication information is not missed, the receiving operation of the specific communication information is not initiated. , to avoid system overhead and waste of resources.

Optionally, when the unlicensed cell includes multiple unlicensed channels, the unlicensed cell available indication includes information of an unlicensed channel in an available state.

Optionally, when the specific communication information is the synchronization signal or the system information, determining whether to receive the subscription number of the specified number of specific communication information during the last time the unlicensed cell is in the unavailable state includes:

Determine whether the information receiving timer expires;

If the information receiving timer expires, determining a receiving occasion that misses the predetermined number of specific communication information during the last time the unlicensed cell is in an unavailable state;

The information receiving timer starts timing after each successful receiving of the specific communication information, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the sending period is configured or agreed in advance by the base station and the UE.

Optionally, when the specific communication information is the synchronization signal or the system information, it is determined whether the number of times of receiving the specific communication information in the process of the unavailable state of the unlicensed cell is incorrect, including:

Obtaining the second time when the last successful communication of a particular communication message was received;

Calculating a time difference between the first time and the second time;

If the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, it is determined that the reception opportunity of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state.

Optionally, when the specific communication information is a paging message, determining, when the unlicensed cell is in an unavailable state, whether to miss the receiving occasion of the specified number of specific communication information, including:

Determining, according to a pre-configured or agreed paging message receiving occasion, whether a receiving occasion of a predetermined number of paging messages occurs within a time period from the second time to the first time;

If a receiving occasion of a predetermined number of paging messages occurs during the time period from the second time to the first time, determining the timing of receiving the missed number of paging messages during the last time the unlicensed cell is unavailable ;

When the paging message is a paging message of the UE, the paging message is sent at the timing of the paging message of the UE.

Optionally, initiating a specific communication information receiving operation, including:

Searching for specific communication information on at least one of the unlicensed channels of the unlicensed cell;

After the specific communication information is searched, the specific communication information is received.

Optionally, after receiving the unlicensed cell available indication sent by the base station, the method further includes:

Receiving communication data sent by the base station through an unlicensed cell currently in an available state;

If the communication data fails to be received, the receiving failure indication of the communication data is fed back to the base station according to the HARQ timing relationship;

Searching for retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to the HARQ timing relationship;

Receiving the communication data after searching for the communication data;

FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention. For example, as shown in FIG. 3, the method flow provided by the embodiment of the present invention includes:

301. The base station periodically sends a synchronization signal to the UE by using an unlicensed cell.

In the embodiment of the present invention, since the frequency corresponding to the unlicensed cell is an unlicensed frequency, there may be a case where the other device also uses the frequency resource, so the base station corresponding to the unlicensed cell needs to compete for the unlicensed frequency resource. For example, the base station competes for the exemption frequency by adopting LBT (Listen Before Talk). If the base station competes for the unlicensed frequency resource, the unlicensed cell is in an available state. The base station periodically transmits a synchronization signal to the UE through an unlicensed cell in an available state.

The reason why the base station periodically sends the synchronization signal to the UE is that in the application of the mobile communication system, the UE must search for a suitable cell as soon as possible after starting the system, and then synchronize with the cell to reach the time slot and frequency to obtain the UE. The detailed information of the cell realizes data transmission with the base station. That is, the UE can use the network service only after logging in to the cell. The process from power-on search to login to a suitable cell is typically defined as the cell initial search process. Synchronization is a key step in the initial search process.

The period in which the base station sends the synchronization signal to the UE may be configured or agreed in advance by the base station and the UE, which is not specifically limited in this embodiment of the present invention.

302. When the unlicensed cell transitions from the available state to the unavailable state, the base station stops transmitting the synchronization signal.

There is a maximum limit on the length of time that the base station takes up the unlicensed frequency resource at one time. So the base station is occupying After the time of the unlicensed frequency resource reaches the maximum limit time, the unlicensed frequency resource must be released. After the base station releases the occupied unlicensed frequency resource, the unlicensed cell corresponding to the base station is converted from the available state to the unavailable state. After the unlicensed cell corresponding to the base station enters the unavailable state, the base station stops transmitting the synchronization signal due to the lack of the transmission medium of the synchronization signal.

303. The base station detects whether the unlicensed cell is converted from an unavailable state to an available state. When the unlicensed cell transitions from the unavailable state to the available state, the base station sends an unlicensed cell available indication to the UE.

In the embodiment of the present invention, after the base station transitions from the available state to the unavailable state, the base station may re-take the LBT mode to compete for the unlicensed frequency resource. After the base station competes again for the unlicensed frequency resource, it is determined that the unlicensed cell is converted from the unavailable state to the available state.

It should be noted that the unlicensed cell corresponding to the base station can be divided into multiple channels. For example, if the bandwidth of the unlicensed cell is 80 MHz, it can be divided into four 20 MHz unlicensed channels. The number of the unlicensed cells may be limited to four, five, or six, and the like, and is not specifically limited in this embodiment of the present invention, and may be determined by factors such as the bandwidth of the unlicensed cell. When the unlicensed cell includes multiple unlicensed channels, the unlicensed cell available indication includes information of the unlicensed channel in an available state.

Correspondingly, in the case that the unlicensed cell is divided into multiple channels, in detecting whether the unlicensed cell is converted from the unavailable state to the available state, the following manner may be implemented: respectively competing for the frequency resource corresponding to each of the unlicensed channels. When the frequency resource corresponding to the at least one unlicensed channel is contending, it is detected that the unlicensed cell is converted from the unavailable state to the available state.

In addition, after the base station is converted from the unavailable state to the available state, the synchronization signal may be additionally sent or sent to the UE. In order to enable the UE to determine whether it needs to prepare for data reception in time, the base station needs to send the unlicensed cell to the UE. The indication is such that the UE knows the status of the exempted cell in time, and then decides whether to start the data receiving operation. The unlicensed cell may use a character such as "available", such as "available", or a special message that the base station has previously agreed with the UE. The special message is representative of the cell, and the embodiment of the present invention provides an indication for the unlicensed cell. The form is not specifically limited. When the base station sends an unlicensed cell available indication to the UE, the base station may implement the following manner:

In the first mode, when the unlicensed cell is switched from the unavailable state to the available state, the unlicensed cell currently in the available state is sent an unlicensed cell available indication to the UE.

For the first mode, if the base station competes for the frequency resource of an unlicensed channel in the unlicensed cell, the unlicensed cell available indication is sent to the UE through the unlicensed channel. If the base station competes for the frequency resources of the plurality of unlicensed channels in the unlicensed cell, the excluded channel may be selected from the plurality of available unlicensed channels according to the configuration rule (for example, the channel usage priority). Authorized cell available indication. Certainly, an unlicensed channel may be randomly selected from a plurality of available unlicensed channels to send an unlicensed cell available indication to the UE, which is not specifically limited in this embodiment of the present invention.

In the second mode, when the unlicensed cell is switched from the unavailable state to the available state, the unlicensed cell available indication is sent to the UE by other cells serving the UE.

For the second mode, the server refers to the primary serving cell in the case of carrier aggregation or dual connectivity in other cells of the UE. In the case of carrier aggregation or dual connectivity, the UE can communicate with two base stations simultaneously or in a time-sharing to increase the peak rate and throughput of the cell edge. One of the primary base stations provides the S1-Mobile Management Entity Interface connection for the UE. The primary base station also provides a primary serving cell, which is an authorized cell. The other is a secondary base station, which is mainly used to provide additional radio resources for data transmission. The base station in the embodiment of the present invention refers to the secondary base station. The secondary base station provides a secondary cell, and the secondary cell is an unlicensed cell.

304. The base station determines, when the unlicensed cell is in an unavailable state, whether to miss the transmission timing of the predetermined number of synchronization signals; if the base station misses the transmission of the agreed number of synchronization signals in the process that the unlicensed cell is in an unavailable state at one time At the timing, the following step 305 is performed; if the base station does not miss the transmission timing of the predetermined number of synchronization signals during the time when the unlicensed cell is in the unavailable state, the processing flow ends.

Wherein, the agreed number is an integer greater than or equal to 1.

In the embodiment of the present invention, after the unlicensed cell is converted from the unavailable state to the available state, the base station does not immediately send the synchronization signal to the UE, but first determines whether the unlicensed cell is missed during the unavailable state. The timing of the transmission of a predetermined number of synchronization signals. If the transmission timing of the predetermined number of synchronization signals is missed, the synchronization signal is additionally transmitted. If the transmission timing of the predetermined number of synchronization signals is not missed, there is no need to additionally transmit the synchronization signal. By such a mechanism of judging whether to miss the transmission of the synchronization signal, it is possible to effectively avoid the huge system overhead caused by the base station unnecessarily transmitting the synchronization signal to the UE without the downlink synchronization being lost due to the unlicensed cell being unavailable.

After detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station may determine whether the unlicensed cell misses the transmission timing of the agreed number of synchronization signals during the unavailable state in the following two ways:

In the first mode, the base station determines whether the synchronization signal sending timer expires; if the synchronization signal sending timer expires, it determines that the transmission timing of the predetermined number of synchronization signals is missed during the last time the unlicensed cell is in the unavailable state.

Wherein, the synchronization signal sending timer starts timing after each successful transmission of the synchronization signal, and timing The period is a predetermined number of times of the transmission period of the synchronization signal, which may be configured or agreed in advance by the base station and the UE.

The second mode, the base station acquires the first time corresponding to the current specified frame number, and obtains the second time of the last successful transmission of the synchronization signal; calculates the time difference between the first time and the second time; and determines the time difference Whether it is greater than a predetermined number of times of the transmission period of the synchronization signal; if the time difference is greater than a predetermined number of times of the transmission period of the synchronization signal, determining that the base station misses the predetermined number of synchronization signals during the unavailable state of the unlicensed cell The timing of the transmission.

The current specified frame number is a combination of the current system frame number, the current subframe number, the current system frame number, and the current subframe number. The first time and the second time are only used to distinguish between the time when the base station acquires the current specified frame number and the time when the base station successfully transmits the synchronization signal last time, and have no other special meaning.

It should be noted that, in the embodiment of the present invention, the base station determines whether to additionally transmit the synchronization signal by determining whether to miss the transmission timing of the predetermined number of periodic synchronization signals. Similarly, after receiving the unlicensed cell available indication sent by the base station, the UE also determines whether to initiate the synchronization signal receiving operation by using a similar method to the base station, and if the unlicensed cell is in the unavailable state, it is missed. When the receiving timing of the number of synchronization signals is agreed, the data receiving operation is started; if the receiving timing of the predetermined number of synchronization signals is not missed during the time when the unlicensed cell is in the unavailable state, the processing flow ends.

The specific mode is as follows: when the UE determines whether the subscription timing of the predetermined number of synchronization signals is missed during the unavailable state in the unlicensed cell, the specific manner is as follows:

In the first mode, it is determined whether the synchronization signal receiving timer expires; if the synchronization signal receiving timer expires, it is determined that the receiving timing of the predetermined number of synchronization signals is missed during the time when the unauthorized cell is in an unavailable state.

The synchronization signal receiving timer starts counting every time the synchronization signal is successfully received, and the timing period is a predetermined number of times of the transmission period of the synchronization signal.

The second method is: acquiring a first time corresponding to the current specified frame number; acquiring a second time when the synchronization signal is successfully received last time; calculating a time difference between the first time and the second time; determining whether the time difference is It is greater than the agreed number of times of the transmission period of the synchronization signal; if the time difference is greater than the agreed number of times of the transmission period of the synchronization signal, it is determined that the reception timing of the synchronization signal is missed during the time when the unlicensed cell is in the unavailable state.

305. If the base station misses the sending occasion of the predetermined number of synchronization signals in the process that the unlicensed cell is in the unavailable state, the base station adds the UE to the UE through the unauthorized cell currently in the available state. Send a sync signal.

When the base station detects that the unlicensed cell is converted from the unavailable state to the available state, and misses the transmission timing of the agreed number of synchronization signals in the process that the unlicensed cell is in the unavailable state, immediately passes the currently available unlicensed cell. The UE additionally transmits a synchronization signal. Wherein, "immediately" refers to starting to additionally transmit a synchronization signal within one subframe after the unauthorized cell is switched from the unavailable state to the available state. Since the unlicensed cell is divided into multiple unlicensed channels, when the synchronization signal is additionally sent to the UE through the unlicensed cell, the following manner can be implemented:

When the contention-free channel is one, the synchronization signal is additionally sent to the UE through the unlicensed channel; when there are multiple unlicensed channels that are contending, for each of the unlicensed channels that are contending, each of the exemptions is passed. The channel additionally transmits a synchronization signal to the UE.

It should be noted that, since the base station periodically sends a synchronization signal to the UE, after the base station additionally transmits the synchronization signal, the base station may periodically pass the unlicensed cell according to the timing of the synchronization signal pre-configured or agreed by the base station and the UE. A synchronization signal is sent to the UE. Alternatively, after additionally transmitting the synchronization signal, the base station may further recalculate the transmission timing of the subsequent synchronization signal according to the timing of additionally transmitting the synchronization signal and the pre-configured or agreed synchronization signal transmission period; according to the recalculated transmission timing, periodically The synchronization signal is transmitted through the unlicensed cell. In a specific implementation, any one of the foregoing two manners may be used to send a subsequent synchronization signal, which is not specifically limited in this embodiment of the present invention.

In the embodiment of the present invention, after receiving the available indication of the unlicensed cell, if the UE determines that the receiving time of the predetermined number of synchronization signals is missed during the unavailable state of the unlicensed cell, the UE starts the synchronization signal receiving operation. It is ready to receive the synchronization signal additionally transmitted by the base station. When the UE initiates the synchronization signal receiving operation, the UE may be implemented by searching for a synchronization signal on at least one of the unlicensed channels of the unlicensed cell; and after receiving the synchronization signal, receiving the synchronization signal.

The method provided by the embodiment of the present invention, when detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission timing of the agreed number of synchronization signals in the process that the unlicensed cell is in the unavailable state at one time. Determining whether to additionally send a synchronization signal; if the base station determines that the transmission timing of the predetermined number of synchronization signals is missed, the synchronization signal is additionally sent to the UE through the available unlicensed cell; if the base station determines that the transmission of the predetermined number of synchronization signals is not missed At the timing, the synchronization signal is not additionally transmitted, and the problem that the UE may lose the downlink synchronization when the unlicensed cell is unavailable is solved, and the huge system caused by the base station additionally transmitting the synchronization signal to the UE after each competition to the unlicensed frequency resource is avoided. Overhead.

In addition, the UE side judges whether to miss the reception timing of the predetermined number of synchronization signals by the same method. Determining whether to start the receiving operation of the synchronization signal; if the UE determines that the receiving timing of the predetermined number of synchronization signals is missed, the receiving operation of the synchronization signal is started; if the UE determines that the receiving timing of the predetermined number of synchronization signals is not missed, the synchronization is not started. The receiving operation of the signal further avoids the overhead of the system and the waste of resources.

FIG. 4 is a flowchart of a data transmission method according to an embodiment of the present invention. Taking the system information transmitted between the base station and the UE as an example, referring to FIG. 4, the method process provided by the embodiment of the present invention includes:

401. The base station periodically sends system information to the UE by using an unlicensed cell.

In the embodiment of the present invention, the system information is divided into a MIB (Main Information Block) and various SIBs (System Information Blocks). Among them, the MIB and various SIBs are sent on a periodic basis, but their transmission periods may be different. For example, the MIB always transmits on a subframe with a subframe number of 0, and the scheduling period is 10 ms. The initial HARQ version is transmitted in subframe 0 of the radio frame whose system frame number modulo 4 is 0, and the four HARQ versions are sequentially transmitted in subframe 0 of 4 consecutive system frames. SIB1 is always transmitted in subframe 5 of the system frame whose system frame number modulo 2 is 0, and the scheduling period is 20 ms. The initial HARQ version of SIB1 is transmitted in subframe 5 of the system frame whose system frame number modulo 8 is 0, and the four HARQ versions are sequentially transmitted in subframe 5 of the system frame in which four system frame numbers modulo 2 are 0. The description of the system information in the embodiment of the present invention is applicable to the MIB and various SIBs, respectively.

402. When the unlicensed cell transitions from an available state to an unavailable state, the base station stops transmitting system information.

This step is the same as the implementation shown in step 302 in the foregoing embodiment, and details are not described herein again.

403. The base station detects whether the unlicensed cell is converted from an unavailable state to an available state. When the unlicensed cell is converted from the unavailable state to the available state, the base station sends an unlicensed cell available indication to the UE by using an unlicensed cell that is currently in an available state.

This step is the same as the implementation shown in step 303 in the foregoing embodiment, and details are not described herein again.

404. The base station determines, when the unlicensed cell is in an unavailable state, whether to miss the sending timing of the agreed number of system information; if the base station misses the sending of the agreed number of system information in the process that the unlicensed cell is unavailable in the last time At the timing, the following step 405 is performed; if the base station does not miss the transmission timing of the predetermined number of system information in the process that the unlicensed cell is in the unavailable state at one time, the processing flow ends.

This step is the same as the implementation shown in step 304 in the foregoing embodiment, and details are not described herein again.

405. If the base station misses the agreed number in the process of being unavailable in the unlicensed cell once When the system information is sent, the base station additionally sends system information to the UE through the unlicensed cell that is currently in an available state.

When the base station detects that the unlicensed cell is converted from the unavailable state to the available state, and misses the transmission timing of the agreed number of system information in the process that the unlicensed cell is in the unavailable state at one time, the base station is in the default time of the unlicensed cell. In the window, and before the next transmission timing of the system information arrives, the system information is additionally transmitted to the UE through the unlicensed cell currently in the available state. The time window may be configured by the base station and the UE in advance, and may be a fixed size or a flexible size, which is not specifically limited in this embodiment of the present invention. Since the unlicensed cell is divided into multiple unlicensed channels, when the system information is additionally sent to the UE through the unlicensed cell, the following manner can be implemented:

When the contention-free channel is one, the system information is additionally sent to the UE through the unlicensed channel; when there are multiple unlicensed channels that are contending, one of the plurality of unlicensed channels is selected according to the configuration rule. The system information is additionally sent to the UE through the grant channel.

In the embodiment of the present invention, after receiving the available indication of the unlicensed cell, if the UE determines that the receiving time of the agreed number of system information is missed during the unavailable state of the unlicensed cell, the system starts the system information receiving operation. Prepare to receive additional system information sent by the base station. The implementation manner of the synchronization signal receiving operation shown in step 305 above may be adopted by the UE when the system information receiving operation is started, and details are not described herein again.

It should be noted that, since the base station periodically sends the system information to the UE, after the base station additionally sends the system information, the base station may periodically pass the unlicensed cell according to the system information transmission timing preset or agreed by the base station and the UE. Send system information to the UE. Alternatively, after additionally transmitting the system information, the base station may recalculate the transmission timing of the subsequent system information according to the time of additionally transmitting the system information and the pre-configured or agreed system information transmission period; according to the recalculated transmission timing, periodically System information is transmitted through an unlicensed cell. In the specific implementation, the system information may be sent by using any one of the foregoing two methods, which is not specifically limited in this embodiment of the present invention.

The method provided by the embodiment of the present invention, when detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission timing of the agreed number of system information in the process that the unlicensed cell is in the unavailable state at one time. Determining whether to additionally send system information; if the base station judges that the transmission timing of the agreed number of system information is missed, the system information is additionally transmitted to the UE through the available unlicensed cell; if the base station determines that the transmission timing of the agreed number of system information is not missed , the system information is not sent additionally, and the UE may not be able to receive the system in time when the unlicensed cell is unavailable. The problem of unified information, while avoiding the huge overhead caused by the base station to additionally send system information to the UE after each competition to the unlicensed frequency resource.

In addition, the UE side determines whether to miss the receiving occasion of the predetermined number of system information to determine whether to start the receiving operation of the system information by the same method; if the UE determines that the receiving timing of the agreed number of system information is missed, the system information is started to be received. If the UE determines that the receiving time of the agreed number of system information is not missed, the receiving operation of the system information is not started, and the overhead of the system and the waste of resources are further avoided.

FIG. 5 is a flowchart of a data transmission method according to an embodiment of the present invention. For example, as shown in FIG. 5, the method flow provided by the embodiment of the present invention includes:

501. The base station sends a paging message to the UE according to a specific rule by the unlicensed cell.

In an embodiment of the invention, the specific rules are generated by the base station. For example, the base station acquires a special identification code on a SIM (Subscriber Identity Module) card of each UE, and the special identification code corresponding to each UE is fixed and unique. The special identification code corresponding to each UE is divided by a positive integer of 4, 8, or the like; if the special identification code corresponding to a certain UE can divide the positive integer or the remainder into a specified value, a paging message is sent to the UE. Of course, the specific rules may be other forms in addition to the above-mentioned forms, and the embodiment of the present invention does not specifically limit this. The base station configures the sending timing of the paging message for the UE according to the specific rule. After the paging message is configured for the UE, the paging message can be sent to the UE according to the paging message sending occasion.

502. When the unlicensed cell transitions from the available state to the unavailable state, the base station stops sending the paging message.

503. The base station detects whether the unlicensed cell is converted from an unavailable state to an available state. When the unlicensed cell transitions from the unavailable state to the available state, the base station sends an unlicensed cell available indication to the UE.

504. The base station determines, when the unlicensed cell is in an unavailable state, whether to miss the sending occasion of the predetermined number of paging messages; if the base station misses the agreed number of paging messages in the process that the unlicensed cell is unavailable in the last time At the transmission timing, the following step 505 is performed; if the base station does not miss the transmission timing of the predetermined number of paging messages during the unavailable state of the unlicensed cell, the processing flow ends.

In the embodiment of the present invention, after the base station is converted from the unavailable state to the available state by the unlicensed cell, Instead of immediately sending a paging message to the UE, it first determines whether the transmission timing of the agreed number of paging messages is missed during the time when the unlicensed cell is in an unavailable state. If the transmission timing of the agreed number of paging messages is missed, an additional paging message is sent. If the transmission timing of the predetermined number of paging messages is not missed, there is no need to additionally send a paging message.

After detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station may determine, in the following manner, whether the unlicensed cell misses the transmission timing of the agreed number of paging messages during the unavailable state:

Obtaining, by the base station, the first time corresponding to the current specified frame number, and acquiring the second time of the last paging message sending time in the last available state of the unlicensed cell; determining the second time according to the pre-configured paging message sending opportunity Whether the time of sending the appointed number of paging messages occurs in the time period until the first time; if the sending timing of the agreed number of paging messages occurs in the time period from the second time to the first time, it is determined that The sending opportunity of the base station missing the agreed number of paging messages during the last time the unlicensed cell is in the unavailable state. On the contrary, there is no missed transmission timing of the agreed number of paging messages. The current specified frame number is a combination of the current system frame number, the current subframe number, the current system frame number, and the current subframe number.

It should be noted that, in the embodiment of the present invention, the base station determines whether to additionally send a paging message by determining whether to miss the transmission timing of the agreed number of paging messages. Similarly, after receiving the unlicensed cell available indication sent by the base station, the UE also determines whether to initiate the paging message receiving operation by using a method similar to the base station, if the unlicensed cell is in an unavailable state at the same time. If the receiving timing of the predetermined number of paging messages is missed, the data receiving operation is started; if the receiving timing of the agreed number of paging messages is not missed during the unavailable state of the unauthorized cell, the processing flow ends. The receiving timing of the paging message may be determined by the UE according to the special identifier code on the SIM card, which is not specifically limited in this embodiment of the present invention. The manner in which the reception timing is calculated according to the special identification code may be agreed in advance by the UE and the base station.

The specific mode is as follows: The UE determines whether to miss the receiving occasion of the predetermined number of paging messages in the process of the unavailable state in the unlicensed cell.

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is the current system frame number or the current subframe number; and obtaining a second time when the last paging message is sent in the last available state of the unlicensed cell; Pre-configured paging message receiving timing, determining whether a predetermined number of paging messages are received in the time period from the second time to the first time; the second time to the first time occurs during the time period When the number of receiving paging messages is received, it is determined that the license is small. The receiving opportunity of the last missed number of paging messages during the last unavailable state of the zone.

505. If the base station misses the sending occasion of the agreed number of paging messages in the process that the unlicensed cell is in the unavailable state, the base station additionally sends the paging message to the UE by using the unlicensed cell that is currently in the available state.

When the base station detects that the unlicensed cell is converted from the unavailable state to the available state, and misses the sending occasion of the agreed number of paging messages in the process that the unlicensed cell is in the unavailable state, when there is a paging message waiting to be sent When the base station is in the preset time window of the unlicensed cell, and before the next transmission timing of the system information arrives, the base station additionally sends a paging message to the UE through the unlicensed cell currently in the available state. The time window may be configured by the base station and the UE in advance, and may be a fixed size or a flexible size, which is not specifically limited in this embodiment of the present invention. As the unlicensed cell is divided into multiple unlicensed channels, when the paging message is additionally sent to the UE through the unlicensed cell, the system information sending manner shown in step 405 in the foregoing embodiment may be adopted. Narration.

Wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message transmission timing is a paging message transmission timing of the specific UE.

In the embodiment of the present invention, after receiving the available indication of the unlicensed cell, the UE starts to receive the paging message if it determines that the receiving time of the agreed number of paging messages is missed during the unavailable state of the unlicensed cell. Operation, preparing to receive an additional paging message sent by the base station. When the UE initiates the paging message receiving operation, the UE may adopt the implementation manner of the synchronization signal receiving operation shown in step 305 above, and details are not described herein. It should be noted that, in order to save power and improve the probability that the UE correctly receives the paging message, the base station may send multiple times for the same paging message.

According to the method provided by the embodiment of the present invention, when detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission timing of the agreed number of paging messages in the process of the unlicensed cell being unavailable. Sending a paging message additionally; if the base station judges that the transmission timing of the agreed number of paging messages is missed, the paging message is additionally sent to the UE through the available unlicensed cell; if the base station determines that the number of paging messages is not missed, At the timing, the paging message is not sent, and the problem that the UE may not receive the paging message when the unlicensed cell is unavailable is solved, and the base station is prevented from additionally sending the UE to the UE after each competition to the unlicensed frequency resource. The huge overhead caused by the message.

In addition, the UE side determines whether to miss the receiving occasion of the paging message by the same method to determine whether to initiate the receiving operation of the paging message; if the UE determines that the receiving timing of the agreed number of paging messages is missed, the paging is started. The receiving operation of the message; if the UE determines that the receiving occasion of the predetermined number of paging messages is not missed, the receiving operation of the paging message is not started, thereby further avoiding system overhead and waste of resources.

FIG. 6 is a flowchart of a data transmission method according to an embodiment of the present invention. Taking the communication data between the base station and the UE as an example, referring to FIG. 6, the method flow provided by the embodiment of the present invention includes:

601. After the unlicensed cell transitions from the unavailable state to the available state, the base station sends the communication data to the UE by using the first unlicensed channel of the unlicensed cell that is currently in the available state.

It should be noted that the unlicensed cell corresponding to the base station may be divided into one or more channels. For example, if the bandwidth of the unlicensed cell is 80 MHz, it may be divided into four 20 MHz unlicensed channels. The four unlicensed channels share a set of HARQ entities of the unlicensed cell. The four unlicensed channels are all configured with resources for feedback data reception indication. That is, when the UE feeds back the data reception indication to the base station, it can be implemented by any one of the above four unlicensed channels.

When there is communication data to be transmitted, the base station may use the LBT mode to compete for multiple channels in the process of competing for the unlicensed frequency resource. As long as the base station successfully contends to the frequency resource corresponding to an unlicensed channel, the unlicensed cell immediately Convert from unavailable state to available state. The base station selects an available first unlicensed channel to transmit communication data to the UE according to pre-configured or agreed rules, such as channel usage priority. The number of the unlicensed cells may be limited to four, five, or six, and the like, and is not specifically limited in this embodiment of the present invention, and may be determined by factors such as the bandwidth of the unlicensed cell. The process in which the base station sends data to the UE through the first unlicensed channel may be referred to as HARQ initial transmission.

602. If the UE fails to receive the communication data sent by the base station, the UE receives a reception failure indication of the communication data according to the HARQ timing relationship.

After starting the communication data receiving operation, the UE receives the communication data sent by the base station through the unlicensed cell currently in an available state. The UE may receive the communication data by searching for communication data on at least one of the unlicensed channels of the unlicensed cell, and receiving the communication data after searching for the communication data. If the communication data fails to be received, for example, the CRC (Cyclic Redundancy Check) check fails, the UE feeds back the communication data to the base station through the unlicensed cell at the time of feeding back the data reception indication to the base station according to the HARQ timing relationship. Receive failure indication. The HARQ timing relationship means that if the base station sends communication data to the UE in the nth subframe, the UE will feed back to the base station in the n+th subframe. Data reception indication. The k is a positive integer, and is not limited to the FDD (Frequency Division Duplex) mode k=4, and the TDD (Time Division Duplex) mode k>3. .

The base station sends an unlicensed channel used by the communication data to the UE, and the unlicensed channel used by the UE to feed back the data reception indication to the base station may be inconsistent. For example, the base station sends the communication data using the first unlicensed channel, and the UE feeds back the data reception indication to the base station to use the designated unlicensed channel except the first exempted channel. The specified unlicensed channel may be specified by the base station, or may be obtained by the UE in the LBT mode according to the preset rule, which is not specifically limited in this embodiment of the present invention.

603. After receiving the reception failure indication of the communication data fed back by the UE, the base station resends the communication data that the UE does not successfully receive through the available unlicensed channel.

After receiving the reception failure indication of the communication data fed back by the UE, the base station detects whether the unlicensed cell is in an available state. According to the state of the unlicensed cell, the communication data that is not successfully received may be retransmitted to the UE in the following two manners.

In the first mode, if the unlicensed cell is in an available state, the base station resends the communication data that the UE does not successfully receive to the UE through the second unlicensed channel that has contend for the frequency resource.

In the second mode, if the unlicensed cell is in an unavailable state, the base station uses the LBT mode for frequency resource competition for each of the unlicensed channels of the unlicensed cell. When competing for a frequency resource corresponding to an unlicensed channel, the base station resends the communication data that the UE does not successfully receive to the UE through the third unlicensed channel that has contend for the frequency resource. When competing for the frequency resources corresponding to the multiple unlicensed channels, the base station may select among the plurality of available unlicensed channels according to the configuration rule, select a specific unlicensed channel as the third unlicensed channel, and resend the UE to the UE. Successfully received communication data.

For the UE, all the unlicensed channels of the unlicensed cell share a set of HARQ entities of the unlicensed cell, and the first, second, and third unlicensed channels are the same or different exempted channels. The process in which the base station retransmits the previously unsuccessfully received communication data to the UE may be referred to as HARQ retransmission.

At the same time, the UE searches for communication data on at least one available unlicensed channel after detecting that the unlicensed cell is converted from the unavailable state to the available state. If the UE searches for the communication data and successfully decodes the communication data after receiving the communication data, the UE is in the priority one or the set is available at the time of feeding back the communication data reception indication to the base station according to the HARQ timing relationship. The reception success indication of the feedback communication data on the status unlicensed channel. The unlicensed channel used by the UE to feed back the data receiving indication to the base station may be specified by the base station, or may be obtained by the UE in the LBT mode, which is not specifically limited in this embodiment of the present invention. Similarly, feedback this time the data received successfully indicates the letter used. The channel may be different from the channel used for the last feedback data reception failure indication.

The method provided by the embodiment of the present invention, if the UE fails to receive the communication data sent by the base station, returns a reception failure indication of the communication data to the base station according to the HARQ timing relationship. After receiving the reception failure indication of the communication data fed back by the UE, the base station retransmits the communication data that the UE does not successfully receive through the available unlicensed channel. Since the unlicensed cell is divided into multiple unlicensed channels that can independently compete for frequency resources, the base station can independently compete for frequency resources for each of the unlicensed channels, and only needs to successfully compete for an unlicensed channel, and the base station can pass the The unlicensed cell and the UE perform data transmission, which solves the problem that the HARQ transmission and feedback are often interrupted due to the unavailability of the unlicensed cell, thereby affecting the transmission efficiency.

FIG. 7 is a schematic structural diagram of a data transmission apparatus provided by the present invention. The data transmission device is applied to a base station. Referring to FIG. 7, the apparatus includes: a detection module 701, a determination module 702, and an information transmission module 703.

The detecting module 701 is connected to the determining module 702, and configured to detect whether the unlicensed cell is converted from an unavailable state to an available state. The determining module 702 is connected to the information sending module 703, and is configured to convert the unlicensed cell from an unavailable state to an available state. In the state, it is determined whether the transmission time of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state; the information sending module 703 is configured to miss the appointment if the unlicensed cell is in the unavailable state at one time. The number of transmission times of the specific communication information is additionally transmitted to the UE by the unlicensed cell currently in the available state; wherein the transmission timing and the number of appointments of the specific communication information are configured or agreed in advance by the base station and the UE.

Optionally, the unlicensed cell includes at least one unlicensed channel, and the detecting module is configured to respectively compete for the frequency resource corresponding to each of the unlicensed channels; when competing for the frequency resource corresponding to the at least one unlicensed channel, determining that the unlicensed cell is determined by The unavailable state is converted to an available state.

Optionally, when the specific communication information is the system information or the paging message, the information sending module is configured to: when the contention-free channel is one, use the unlicensed channel to additionally send the specific communication information to the UE; When there are multiple unlicensed channels, one of the plurality of unlicensed channels is selected according to the configuration rule, and the specific communication information is additionally transmitted to the UE by selecting the unlicensed channel.

Optionally, when the specific communication information is a synchronization signal, the information sending module is configured to additionally send the specific communication information to the UE through the unlicensed channel for each of the unlicensed channels that are contending.

Optionally, when the specific communication information is a synchronization signal or system information, the determining module is configured to determine Whether the information sending timer expires; if the information sending timer expires, it determines the sending timing of missing the specified number of specific communication information in the unlicensed cell once in the unavailable state; wherein the information sending timer is successfully sent every time The timing is started after the specific communication information, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the transmission period is configured or agreed in advance by the base station and the UE.

Optionally, when the specific communication information is the synchronization signal or the system information, the determining module is configured to acquire the first time corresponding to the current specified frame number, where the current specified frame number is the current system frame number, the current subframe number, and the current system frame. The combination of the number and the current subframe number; obtaining the second time of the last successful transmission of the specific communication information; calculating the time difference between the first time and the second time; determining whether the time difference is greater than the transmission period of the specific communication information If the time difference is greater than the agreed number of times of the transmission period of the specific communication information, it is determined that the transmission timing of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in the unavailable state.

Optionally, when the specific communication information is a paging message, the determining module is configured to obtain a first time corresponding to the current specified frame number, where the current specified frame number is the current system frame number or the current subframe number, the current system frame number, and The combination of the current subframe number; obtaining the second time when the last paging message is sent in the last available state of the unlicensed cell; determining the second time to the first according to the pre-configured or agreed paging message transmission timing Whether the scheduled number of paging messages is sent during the time period; the timing of the scheduled number of paging messages occurring during the second time to the first time is determined to be on the unlicensed cell. The timing of the missed appointment of a number of paging messages during an unavailable state.

Optionally, when the specific communication information is a synchronization signal, the information sending module is configured to start to use the unlicensed cell currently in an available state to the UE in one subframe after the unlicensed cell is converted from the unavailable state to the available state. Additional sync signals are sent.

Optionally, when the specific communication information is the system information or the paging message, the information sending module is configured to be in the first preset time window of the unlicensed cell, and before the next time the system information is sent, the current information is The available state of the unlicensed cell additionally sends system information to the UE; or, when there is a paging message waiting to be sent, in the second preset time window of the unlicensed cell, and before the next paging message is sent, Sending a paging message to the UE by the unlicensed cell currently in an available state; wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message is sent at a timing of sending a paging message of the specific UE .

Optionally, the information sending module is further configured to: when the specific communication information is the synchronization signal or the system information, after the specific communication information is additionally sent, the specific communication information pre-configured or agreed according to the base station and the UE Sending timing, periodically transmitting specific communication information through the unlicensed cell; or, when the specific communication information is the synchronization signal or system information, after additionally transmitting the specific communication information, according to the time and pre-configuration or agreement of additionally transmitting the specific communication information The specific communication information transmission period recalculates the transmission timing of the subsequent specific communication information; periodically transmits the specific communication information through the unlicensed cell according to the recalculated transmission timing.

Optionally, the device further includes:

The available indication sending module is configured to: when the unlicensed cell is converted from the unavailable state to the available state, send an unlicensed cell available indication to the UE by the unlicensed cell currently in the available state; or, when the unlicensed cell is changed from the unavailable state When the state is in the available state, the unlicensed cell available indication is sent to the UE by the other cell serving the UE. The unlicensed cell available indication is used to indicate to the UE whether to determine whether the number of the reserved number is missed during the unavailable state of the unlicensed cell. The timing of reception of specific communication information.

Optionally, the device further includes:

a data sending module, configured to send, by the first unlicensed channel of the unlicensed cell currently in an available state, communication data to the UE after the unlicensed cell is converted from the unavailable state to the available state, where the unlicensed cell includes one or more exemptions Authorized channel;

And a detecting module, configured to: if receiving the receiving failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at the time of retransmitting the communication data next time;

a data sending module, configured to: if the unlicensed cell is in an available state, resend the communication data that the UE does not successfully receive to the UE by using the second unlicensed channel that has contend for the frequency resource in the unlicensed cell; if the unlicensed cell is unavailable With the state, the frequency resources corresponding to each of the unlicensed channels are respectively contending, and when competing for the frequency resources corresponding to the at least one unlicensed channel, the UE is resent to the UE through the third unlicensed channel that has contend for the frequency resource. Communication data to;

For all the unlicensed channels of the UE, the unlicensed cell shares a set of HARQ entities of the unlicensed cell, and the first, second, and third unlicensed channels are the same or different exempted channels.

The device provided by the embodiment of the present invention, when detecting that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission of the specified number of specific communication information in the process of the unlicensed cell being in the unavailable state. Timing to decide whether to send specific communication information additionally; if the base station judges that the transmission timing of the specified number of specific communication information is missed, the specific communication information is additionally sent to the UE through the available unlicensed cell; if the base station determines that the specified number of specifics are not missed When the communication information is sent, no specific communication information is sent, which solves when the unlicensed cell is unavailable. The UE may not be able to receive the problem of specific communication information, and at the same time avoid the huge overhead caused by the base station to additionally transmit specific communication information to the UE each time it competes for the unlicensed frequency resource. In addition, since an unlicensed cell is divided into an unlicensed channel capable of independently competing for frequency resources, the base station can independently compete for frequency resources for each of the unlicensed channels, and only needs to successfully compete for an unlicensed channel, and the base station can The data transmission by the unlicensed cell and the UE solves the problem that the HARQ transmission and feedback are often interrupted due to the unavailability of the unlicensed cell, thereby affecting the transmission efficiency.

FIG. 8 is a schematic structural diagram of a data transmission apparatus provided by the present invention. The data transmission device is applied to the UE. Referring to FIG. 8, the apparatus includes: a determining module 801, a starting module 802, and an information receiving module 803.

The determining module 801 is connected to the initiating module 802, and is configured to determine, when the unlicensed cell is in the unavailable state, whether to miss the receiving occasion of the specified number of specific communications information after receiving the unlicensed cell available indication sent by the base station. The initiating module 802 and the information receiving module 803 are configured to start a specific communication information receiving operation if the receiving time of the predetermined number of specific communication information is missed during the unavailable state of the unlicensed cell, and the information receiving module 803 uses And receiving, by the base station, specific communication information that is additionally sent by the unlicensed cell that is currently in an available state; wherein, the receiving occasion of the specific communication information is configured or agreed in advance by the base station and the UE.

Optionally, when the specific communication information is the synchronization signal or the system information, the determining module is configured to determine whether the information receiving timer expires; if the information receiving timer expires, determining that the unlicensed cell is in an unavailable state The timing of receiving the predetermined number of specific communication information is missed; wherein the information receiving timer starts counting every time the specific communication information is successfully received, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the transmission period is performed by the base station and the UE. Pre-configure or contract.

Optionally, when the specific communication information is the synchronization signal or the system information, the determining module is configured to acquire the first time corresponding to the current specified frame number, where the current specified frame number is the current system frame number, the current subframe number, and the current system frame. Combination of the number and the current subframe number; obtaining the second time when the last successful reception of the specific communication information;

Calculating a time difference between the first time and the second time; determining whether the time difference is greater than a predetermined number of times of the transmission period of the specific communication information; if the time difference is greater than the transmission period of the specific communication information The number of appointments is determined to determine the reception timing of missing a predetermined number of specific communication information during the last time the unlicensed cell is in an unavailable state.

Optionally, when the specific communication information is a paging message, the determining module is configured to acquire a first time corresponding to the currently specified frame number, where the current specified frame number is a current system frame number, a current subframe number, a current system frame number, and The combination of the current subframe number; obtaining the second time when the last paging message is sent in the last available state of the unlicensed cell; determining the timing at the second time according to the pre-configured or agreed paging message reception timing Whether the receiving timing of the predetermined number of paging messages occurs in the time period; if the receiving timing of the agreed number of paging messages occurs in the time period from the second time to the first time, determining the unlicensed cell The receiving opportunity of the last number of paging messages is missed during the last unavailable state; wherein, when the paging message is the paging message of the UE, the paging message is sent at the timing of the paging message of the UE.

Optionally, the startup module is configured to search for specific communication information on the at least one unauthorized channel of the unlicensed cell; after searching for the specific communication information, receive the specific communication information.

Optionally, the device further includes:

a data receiving module, configured to receive, by the base station, communication data sent by an unlicensed cell that is currently in an available state;

a receiving feedback module, configured to: when receiving the communication data fails, feed back, to the base station, a reception failure indication of the communication data according to the HARQ timing relationship;

a searching module, configured to search for retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to the HARQ timing relationship;

a data receiving module, configured to receive the communication data after searching for the communication data;

And receiving a feedback module, configured to: if the communication data is successfully decoded, feed back a success indication of the communication data to the base station.

The apparatus provided by the embodiment of the present invention, after the UE receives the available indication of the unlicensed cell, and learns that the unlicensed cell transitions from the unavailable state to the available state, the UE determines whether to miss the specified number of specific communication information by using the same method as the base station side. Receive timing; if the UE determines that the reception timing of the predetermined number of specific communication information is missed, the receiving operation of the specific communication information is initiated; if the UE determines that the receiving timing of the predetermined number of specific communication information is not missed, the reception of the specific communication information is not initiated. The operation avoids the overhead of the system and the waste of resources. In addition, since an unlicensed cell is divided into an unlicensed channel capable of independently competing for frequency resources, the UE can independently compete for frequency resources for each of the unlicensed channels, and only needs to successfully compete for an unlicensed channel, and the UE can Pass the exempted cell and base The station performs data transmission, which solves the problem that the HARQ transmission and feedback are often interrupted due to the unavailability of the unlicensed cell, thereby affecting the transmission efficiency.

It should be noted that, when the data transmission device provided by the foregoing embodiment performs data transmission, only the division of each functional module described above is illustrated. In actual applications, the function distribution may be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. In addition, the data transmission apparatus and the data transmission method embodiment provided by the foregoing embodiments are in the same concept, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention. Referring to FIG. 9, a receiver 901, a transmitter 902, a memory 903, and a processor 904, the receiver 901, the transmitter 902, and the memory 903 are included. Connected to the processor 904, the memory 903 stores program code, and the processor 904 is configured to call the program code to perform the following operations:

Detecting whether the unlicensed cell is converted from the unavailable state to the available state; when the unlicensed cell is converted from the unavailable state to the available state, determining whether the agreed number of specific communications information is missed during the last time the unlicensed cell is in the unavailable state Sending time; if the transmission opportunity of the predetermined number of specific communication information is missed during the unavailable state in the unlicensed cell, the specific communication information is additionally sent to the UE through the unlicensed cell currently in the available state; wherein, the specific communication information The transmission timing and the number of appointments are pre-configured or agreed by the base station and the UE.

Optionally, the processor 904 is further configured to invoke the program code to perform the following operations:

When there are multiple unlicensed channels that are contending, one of the plurality of unlicensed channels is selected according to the configuration rule, and the specific communication information is additionally sent to the UE by selecting the unlicensed channel.

For each of the unlicensed channels that are contending, an additional pass is sent to the UE through the unlicensed channel. Letter information.

Determine whether the information sending timer expires;

Calculating a time difference between the first time and the second time;

Within one subframe after the unlicensed cell transitions from the unavailable state to the available state, the synchronization signal is additionally transmitted to the UE through the unlicensed cell currently in the available state.

Within the first preset time window of the exempted cell, and the next time the system information is sent Previously, the system information is additionally sent to the UE through the unlicensed cell currently in an available state; or

When the specific communication information is the synchronization signal or the system information, after the specific communication information is additionally transmitted, the specific communication information is periodically sent through the unlicensed cell according to the specific communication information transmission timing preset or agreed by the base station and the UE; or

When the specific communication information is the synchronization signal or the system information, after the specific communication information is additionally transmitted, the transmission timing of the subsequent specific communication information is recalculated according to the timing of additionally transmitting the specific communication information and the pre-configured or agreed-up specific communication information transmission period; The specific communication information is periodically transmitted through the unlicensed cell according to the recalculated transmission opportunity.

If the unlicensed cell is in an available state, retransmitting the communication data that the UE does not successfully receive to the UE by using the second unlicensed channel that has contend for the frequency resource in the unlicensed cell;

If the unlicensed cell is in an unavailable state, it competes for the frequency resource corresponding to each of the unlicensed channels, and when competing for the frequency resource corresponding to the at least one unlicensed channel, The third unlicensed channel of the source resends the communication data that the UE does not successfully receive to the UE;

When the base station provided by the embodiment of the present invention detects that the unlicensed cell transitions from the unavailable state to the available state, the base station determines whether to miss the transmission of the specified number of specific communication information in the process that the unlicensed cell is in the unavailable state. Timing to decide whether to send specific communication information additionally; if the base station judges that the transmission timing of the specified number of specific communication information is missed, the specific communication information is additionally sent to the UE through the available unlicensed cell; if the base station determines that the specified number of specifics are not missed When the communication information is sent, the specific communication information is not additionally transmitted, and the problem that the UE may not receive the specific communication information when the unlicensed cell is unavailable is solved, and the base station is prevented from each time after competing for the unlicensed frequency resource. The huge overhead caused by the UE to additionally transmit specific communication information. In addition, since an unlicensed cell is divided into an unlicensed channel capable of independently competing for frequency resources, the base station can independently compete for frequency resources for each of the unlicensed channels, and only needs to successfully compete for an unlicensed channel, and the base station can The data transmission by the unlicensed cell and the UE solves the problem that the HARQ transmission and feedback are often interrupted due to the unavailability of the unlicensed cell, thereby affecting the transmission efficiency.

FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. Referring to FIG. 10, the system includes: a receiver 1001, a transmitter 1002, a memory 1003, and a processor 1004. The receiver 1001, the transmitter 1002, and the memory are provided. 1003 is respectively connected to the processor 1004. The memory 1003 stores program code, and the processor 1004 is configured to call the program code to perform the following operations:

After receiving the unlicensed cell available indication sent by the base station, determining whether the unlicensed cell misses the receiving occasion of the specified number of specific communication information during the last unavailable state; if the unlicensed cell is in the unavailable state Receiving a specific communication information receiving operation in the case of missing a predetermined number of communication information; receiving a specific communication information additionally transmitted by the base station through an unlicensed cell currently in an available state; wherein, the receiving timing of the specific communication information is performed by the base station and the UE Pre-configure or contract.

Optionally, the processor 1004 is further configured to invoke the program code to perform the following operations:

When the unlicensed cell includes multiple unlicensed channels, the unlicensed cell available indication includes information of the unlicensed channel in an available state.

Determine whether the information receiving timer expires;

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number or a current subframe number, a current system frame number, and a current subframe number;

Calculating a time difference between the first time and the second time;

After searching for specific communication information, receiving specific communication information.

If the communication data fails to be received, the communication data is fed back to the base station according to the HARQ timing relationship. Receiving a failure indication;

Searching for communication data on at least one available unlicensed channel of the unlicensed cell according to the HARQ timing relationship;

Receiving the communication data after searching for the communication data;

In the user equipment provided by the embodiment of the present invention, after the UE receives the available indication of the unlicensed cell, and learns that the unlicensed cell transitions from the unavailable state to the available state, the UE determines whether to miss the specified number of specific communication information by using the same method as the base station side. The receiving timing determines whether to initiate the receiving operation of the specific communication information; if the UE determines that the receiving opportunity of the predetermined number of specific communication information is missed, the receiving operation of the specific communication information is initiated; if the UE determines that the specified number of specific communication information is not missed At the receiving occasion, the receiving operation of the specific communication information is not started, and the overhead of the system and the waste of resources are further avoided.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A data transmission method, characterized in that the method comprises:

Detecting whether the unlicensed cell is converted from an unavailable state to an available state;

Determining, when the unlicensed cell transitions from the unavailable state to the available state, whether a transmission timing of the agreed number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

If the transmission opportunity of the predetermined number of specific communication information is missed during the unavailable state of the unlicensed cell, the specific communication information is additionally sent to the user equipment UE by the unlicensed cell currently in an available state;

The sending timing and the agreed number of the specific communication information are configured or agreed in advance by the base station and the UE.
The method according to claim 1, wherein the unlicensed cell comprises at least one unlicensed channel, and the detecting whether the unlicensed cell is converted from an unavailable state to an available state comprises:

Competing for frequency resources corresponding to each of the unlicensed channels;

When competing for the frequency resource corresponding to the at least one unlicensed channel, it is determined that the unlicensed cell is converted from the unavailable state to the available state.
The method according to claim 2, wherein when the specific communication information is system information or a paging message, the unlicensed cell currently in an available state additionally transmits the specific to the user equipment UE Communication information, including:

When the contention-free channel is one, the specific communication information is additionally sent to the UE through the unlicensed channel;

When there are multiple unlicensed channels that are contending, an unlicensed channel is selected among the plurality of unlicensed channels according to the configuration rule, and the specific communication information is additionally sent to the UE by selecting an unlicensed channel.
The method according to claim 2, wherein when the specific communication information is a synchronization signal, the unlicensed cell currently in an available state additionally transmits the specific communication information to the user equipment UE, including :

For each of the unlicensed channels that are contending, the UE is additionally sent through the unlicensed channel The specific communication information.
The method according to claim 1, wherein when the specific communication information is a synchronization signal or system information, the determining whether a predetermined number of specifics are missed during the last time the unlicensed cell is in an unavailable state When to send communication information, including:

Determine whether the information sending timer expires;

And if the information sending timer expires, determining, when the unlicensed cell is in an unavailable state, missing the sending occasion of the specified number of the specific communications information;

The information sending timer starts counting every time the specific communication information is successfully sent, and the timing period is a predetermined number of times of the sending period of the specific communication information, and the sending period is performed by the base station and the UE. Pre-configure or contract.
The method according to claim 1, wherein when the specific communication information is a synchronization signal or system information, the determining whether the number of reservations is missed during the last time the unlicensed cell is in an unavailable state The timing of sending specific communication information, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a current system frame number, a current subframe number, or a combination of the current system frame number and the current subframe number;

Obtaining a second time when the last successful transmission of the specific communication information is obtained;

Calculating a time difference between the first time and the second time;

Determining whether the time difference is greater than a predetermined number of times of a transmission period of the specific communication information;

If the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, determining that the transmission timing of the predetermined number of the specific communication information is missed during the last time the unlicensed cell is in an unavailable state .
The method according to claim 1, wherein when the specific communication information is a paging message, the determining whether to miss an agreed number of the specifics during the last time the unlicensed cell is in an unavailable state When to send communication information, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number;

Obtaining a second time when the last paging message is sent in the last available state of the unlicensed cell;

Determining, according to a pre-configured or agreed-up paging message sending occasion, whether a predetermined number of sending times of the paging message occurs in a time period from the second time to the first time;

Determining, at a time interval from the second time to the first time, a timing of sending the agreed number of the paging messages, determining that the missed status in the unauthorized state is missed The timing of the transmission of the number of the paging messages is agreed.
The method according to claim 1, wherein when the specific communication information is a synchronization signal, the unlicensed cell currently in an available state additionally transmits the specific communication information to the user equipment UE, including :

Within one subframe after the unlicensed cell transitions from the unavailable state to the available state, the synchronization signal is additionally transmitted to the UE through the unlicensed cell currently in an available state.
The method according to claim 1, wherein when the specific communication information is system information or a paging message, the unlicensed cell currently in an available state additionally transmits the specific to the user equipment UE Communication information, including:

The system information is additionally sent to the UE by the unlicensed cell currently in an available state, in a first preset time window of the unlicensed cell, and before the next time the transmission opportunity of the system information arrives; or,

When there is a paging message waiting to be sent, in the second preset time window of the unlicensed cell, and before the next transmission timing of the paging message arrives, the unlicensed cell currently in an available state is passed. Sending the paging message to the UE additionally;

Wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message sending occasion is a paging message sending occasion of the specific UE.
The method of claim 1 further comprising:

When the specific communication information is a synchronization signal or system information, after the specific communication information is additionally sent, periodically, according to the specific communication information transmission timing that is pre-configured or agreed by the base station and the UE, Authorizing the cell to send the specific communication information; or,

When the specific communication information is a synchronization signal or system information, after additionally transmitting the specific communication information, recalculating the subsequent specific according to the time at which the specific communication information is additionally transmitted and the pre-configured or agreed-up specific communication information transmission period Timing of transmission of communication information; transmission based on recalculation Timing, the specific communication information is periodically sent through the unlicensed cell.
The method of claim 1 further comprising:

And when the unlicensed cell is converted from an unavailable state to an available state, sending, by the unlicensed cell currently in an available state, an unlicensed cell available indication to the UE; or

And when the unlicensed cell is converted from an unavailable state to an available state, sending, by the other cell serving the UE, the unlicensed cell available indication to the UE;

The unlicensed cell available indication is used to instruct the UE to determine whether to receive an appointment number of the specific communication information in the process that the unlicensed cell is in an unavailable state.
The method of claim 1 further comprising:

After the unlicensed cell is converted from the unavailable state to the available state, the communication data is sent to the UE by using the first unlicensed channel of the unlicensed cell currently in an available state, where the unlicensed cell includes one or more Unlicensed channel;

If receiving the reception failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at a time of retransmitting the communication data next time;

If the unlicensed cell is in an available state, retransmitting, by the second unlicensed channel that has contend for the frequency resource in the unlicensed cell, the communication data that is not successfully received by the UE;

If the unlicensed cell is in an unavailable state, the frequency resources corresponding to each of the unlicensed channels are respectively contending, and when competing for the frequency resource corresponding to the at least one unlicensed channel, the third unlicensed channel that has contend for the frequency resource is used. Resending the communication data that the UE did not successfully receive to the UE;

For the UE, all the unlicensed channels of the unlicensed cell share a set of hybrid automatic repeat request HARQ entities of the unlicensed cell, and the first, second, and third exempted channels are the same or Different exempted channels.
A data transmission method, characterized in that the method comprises:

After receiving the unlicensed cell available indication sent by the base station, determining whether a receiving occasion of the predetermined number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

If the receiving opportunity of the specified number of the specific communication information is missed during the last time the unlicensed cell is in the unavailable state, the specific communication information receiving operation is initiated;

Receiving, by the base station, the specific communication information that is additionally sent by the unlicensed cell that is currently in an available state;

The receiving occasion of the specific communication information and the number of appointments are configured or agreed in advance by the base station and the UE.
The method according to claim 13, wherein when the unlicensed cell includes a plurality of unlicensed channels, the unlicensed cell available indication includes information of an unlicensed channel in an available state.
The method according to claim 13, wherein when the specific communication information is a synchronization signal or system information, the determining whether a predetermined number of specifics are missed during the last time the unlicensed cell is in an unavailable state The timing of receiving communication information, including:

Determine whether the information receiving timer expires;

If the information receiving timer expires, determining a receiving occasion that misses the predetermined number of the specific communication information during the last time the unlicensed cell is in an unavailable state;

The information receiving timer starts counting every time the specific communication information is successfully received, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the sending period is performed by the base station and the The UE is configured or agreed in advance.
The method according to claim 13, wherein when the specific communication information is a synchronization signal or system information, the determining whether a predetermined number of specifics are missed during the last time the unlicensed cell is in an unavailable state The timing of receiving communication information, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number or a current subframe number, the current system frame number, and the current subframe number;

Obtaining a second time when the specific communication information is successfully received last time;

Calculating a time difference between the first time and the second time;

Determining whether the time difference is greater than a predetermined number of times of a transmission period of the specific communication information;

If the time difference is greater than a predetermined number of times of the transmission period of the specific communication information, determining that the predetermined number of the specifics are missed during the last time the unlicensed cell is in an unavailable state The timing of receiving communication information.
The method according to claim 13, wherein when the specific communication information is a paging message, the determining whether to miss an agreed number of specific communication information during the last time the unlicensed cell is in an unavailable state Receiving opportunities, including:

Obtaining a first time corresponding to the current specified frame number, where the current specified frame number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number;

Obtaining a second time when the last paging message is sent in the last available state of the unlicensed cell;

Determining, according to a pre-configured or agreed paging message receiving occasion, whether a predetermined number of receiving occasions of the paging message occurs within a time period from the second time to the first time;

Determining, when the receiving time of the predetermined number of the paging messages occurs in the time period from the second time to the first time, determining that the unlicensed cell is in an unavailable state last time Missing the reception timing of the predetermined number of the paging messages;

Wherein, when the paging message is a paging message of the UE, the paging message sending occasion is a paging message sending occasion of the UE.
The method of claim 13, wherein the initiating the specific communication information receiving operation comprises:

Searching for the specific communication information on at least one unauthorized channel of the unlicensed cell;

After searching for the specific communication information, the specific communication information is received.
The method according to claim 13, wherein the method further comprises: after receiving the unlicensed cell available indication sent by the base station, the method further comprises:

Receiving, by the base station, communication data sent by the unlicensed cell currently in an available state;

If the communication data fails to be received, feeding back a failure indication indication of the communication data to the base station according to the hybrid automatic repeat request HARQ timing relationship;

Searching for the retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to a HARQ timing relationship;

Receiving the communication data after searching the communication data;

If the communication data is successfully decoded, the receiving success of the communication data is fed back to the base station Show.
A data transmission device, characterized in that the device comprises:

a detecting module, configured to detect whether an unlicensed cell is converted from an unavailable state to an available state;

a judging module, configured to determine, when the unlicensed cell transitions from an unavailable state to an available state, whether a transmission timing of the specified number of specific communication information is missed during the last unavailable state of the unlicensed cell;

The information sending module is configured to: if the sending opportunity of the specified number of specific communication information is missed during the unavailable state in the unlicensed cell, send the additional data to the user equipment UE by using the unlicensed cell currently in an available state. The specific communication information;

The sending timing and the agreed number of the specific communication information are configured or agreed in advance by the base station and the UE.
The apparatus according to claim 20, wherein the unlicensed cell comprises at least one unlicensed channel, and the detecting module is configured to compete for frequency resources corresponding to each of the unlicensed channels respectively; when competing for at least one exemption When the frequency resource corresponding to the channel is authorized, it is determined that the unlicensed cell is converted from an unavailable state to an available state.
The device according to claim 21, wherein when the specific communication information is system information or a paging message, the information sending module is configured to: when the contention-free channel is one, pass the The unlicensed channel additionally sends the specific communication information to the UE; when there are multiple unlicensed channels that are contending, an unlicensed channel is selected among the plurality of unlicensed channels according to the configuration rule, by selecting an unlicensed channel The specific communication information is additionally transmitted to the UE.
The device according to claim 21, wherein when the specific communication information is a synchronization signal, the information sending module is configured to use the unlicensed channel for each of the unlicensed channels that are contending The UE additionally transmits the specific communication information.
The device according to claim 20, wherein when the specific communication information is a synchronization signal or system information, the determining module is configured to determine whether the information sending timer expires; if the information sending timer expires Determining that the unlicensed cell was previously unavailable. The transmission timing of the predetermined number of the specific communication information is missed; wherein the information transmission timer starts timing after each successful transmission of the specific communication information, and the timing period is an agreement of a transmission period of the specific communication information. A multiple of the transmission period is configured or agreed in advance by the base station and the UE.
The device according to claim 20, wherein, when the specific communication information is a synchronization signal or system information, the determining module is configured to acquire a first time corresponding to a currently specified frame number, the current designated frame The number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number; obtaining a second time of successfully transmitting the specific communication information for the last time; calculating the first time and a time difference between the second times; determining whether the time difference is greater than a predetermined number of times of a transmission period of the specific communication information; if the time difference is greater than a convention of a transmission period of the specific communication information A multiple of the number of transmissions is determined to be missed when the unlicensed cell is in an unavailable state.
The device according to claim 20, wherein when the specific communication information is a paging message, the determining module is configured to acquire a first time corresponding to a currently specified frame number, where the currently specified frame number is a combination of a current system frame number or a current subframe number, the current system frame number, and the current subframe number; acquiring a second time when the last paging message is sent in the last available state of the unlicensed cell And determining, according to a pre-configured or agreed paging message sending occasion, whether a predetermined number of transmission timings of the paging messages occur in the time period from the second time to the first time; Determining a transmission timing of the predetermined number of the paging messages within a time period from the time to the first time, determining that the number of the subscriptions missed during the last time the unlicensed cell is unavailable The timing at which the paging message is sent.
The apparatus according to claim 20, wherein, when the specific communication information is a synchronization signal, the information transmitting module is configured to: after the unlicensed cell is converted from an unavailable state to a usable state, Within the frame, the synchronization signal is additionally transmitted to the UE through the unlicensed cell currently in an available state.
The device according to claim 20, wherein when the specific communication information is system information or a paging message, the information sending module is configured to use the first preset of the unauthorized cell Within the time window, and before the next transmission timing of the system information arrives, the system information is additionally transmitted to the UE through the unlicensed cell currently in an available state; or, when there is a paging message waiting to be sent, The second predetermined time window of the unlicensed cell, and the next time the sending opportunity of the paging message arrives, the paging message is additionally sent to the UE by the unlicensed cell currently in an available state. ;

Wherein, when the paging message waiting to be sent is a paging message of a specific UE, the paging message sending occasion is a paging message sending occasion of the specific UE.
The device according to claim 20, wherein the information sending module is further configured to: when the specific communication information is a synchronization signal or system information, after additionally transmitting the specific communication information, according to the base station Sending the specific communication information periodically through the unlicensed cell with a specific communication information transmission timing pre-configured or agreed by the UE; or when the specific communication information is a synchronization signal or system information, additionally transmitting After the specific communication information, re-calculate the transmission timing of the subsequent specific communication information according to the timing of additionally transmitting the specific communication information and the pre-configured or agreed-up specific communication information transmission period; periodically pass according to the recalculated transmission timing The unlicensed cell transmits the specific communication information.
The device of claim 20, wherein the device further comprises:

An available indication sending module, configured to send, by the unlicensed cell currently in an available state, a cell available indication to the UE when the unlicensed cell transitions from an unavailable state to an available state; or, when the exempt authorization When the cell is converted from the unavailable state to the available state, the cell available indication is sent to the UE by other cells serving the UE; wherein the cell available indication is used to indicate that the UE determines that the license is not authorized. Whether the cell is missed by the appointed number of the specific communication information during the last unavailable state.
The device of claim 20, wherein the device further comprises:

a data sending module, configured to send, by the first unlicensed channel that is currently in an available state, communication data to the UE after the unlicensed cell is converted from an unavailable state to an available state, where the The authorized cell includes one or more unlicensed channels;

The detecting module is configured to: if receiving the receiving failure indication of the communication data fed back by the UE, detecting whether the unlicensed cell is in an available state at a time of retransmitting the communication data next time;

The data sending module is configured to: if the unlicensed cell is in an available state, resend to the UE by using the second unlicensed channel that has contend for the frequency resource in the unlicensed cell that the UE is not successfully received. The communication data; if the unlicensed cell is in an unavailable state, respectively contending for the frequency resource corresponding to each of the unlicensed channels, and when competing for the frequency resource corresponding to the at least one unlicensed channel, The third grant-free channel resends the communication data that the UE did not successfully receive to the UE;

For the UE, all the unlicensed channels of the unlicensed cell share a set of hybrid automatic repeat request HARQ entities of the unlicensed cell, and the first, second, and third exempted channels are the same or Different exempted channels.
A data transmission device, characterized in that the device comprises:

a judging module, configured to: after receiving an unlicensed cell available indication sent by the base station, determine whether a receiving occasion of the specified number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state;

And activating a module, if the receiving opportunity of the specified number of the specific communication information is missed during the unavailable state in the unlicensed cell, starting the specific communication information receiving operation;

An information receiving module, configured to receive the specific communication information that is sent by the base station by using the unlicensed cell that is currently in an available state;

The receiving occasion of the specific communication information and the number of appointments are configured or agreed in advance by the base station and the user equipment UE.
The apparatus according to claim 32, wherein when the unlicensed cell includes a plurality of unlicensed channels, the cell available indication includes information of an unlicensed channel in an available state.
The device according to claim 32, wherein when the specific communication information is a synchronization signal or system information, the determining module is configured to determine whether the information receiving timer times out; if the information receiving timer expires Determining, at the time when the unlicensed cell is in the unavailable state, the subscription time of the predetermined number of the specific communication information is missed; wherein the information receiving timer is after each successful receiving of the specific communication information The timing is started, and the timing period is a predetermined number of times of the transmission period of the specific communication information, and the transmission period is configured or agreed in advance by the base station and the UE.
The device according to claim 32, wherein, when the specific communication information is a synchronization signal or system information, the determining module is configured to acquire a first time corresponding to a currently specified frame number, the current designated frame The number is a combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number; and a second time when the last successful reception of the specific communication information is obtained;

Calculating a time difference between the first time and the second time; determining whether the time difference is greater than a predetermined number of times of a sending period of the specific communication information; if the time difference is greater than the specific And a predetermined number of times of the transmission period of the communication information, determining the reception timing of missing the predetermined number of the specific communication information in the process that the unlicensed cell is in the unavailable state.
The device according to claim 32, wherein, when the specific communication information is a paging message, the determining module is configured to acquire a first time corresponding to a currently specified frame number, where the currently specified frame number is Combination of a current system frame number, a current subframe number, the current system frame number, and the current subframe number; acquiring a second time when the last paging message is sent in the last available state of the unlicensed cell Receiving, according to a pre-configured or agreed paging message receiving occasion, determining whether a predetermined number of receiving times of the paging message occur in the time period from the second time to the first time; Determining the receiving occasion of the predetermined number of the paging messages in the time period from the second time to the first time, determining that the number of missed appointments in the unlicensed cell is in the unavailable state The timing of receiving the paging message;

Wherein, when the paging message is a paging message of the UE, the paging message sending occasion is a paging message sending occasion of the UE.
The apparatus according to claim 32, wherein the activation module is configured to search for the specific communication information on at least one unauthorized channel of the unlicensed cell; after searching for the specific communication information, Receiving the specific communication information.
The device of claim 32, wherein the device further comprises:

a data receiving module, configured to receive communication data that is sent by the base station by using the unlicensed cell that is currently in an available state;

The receiving feedback module is configured to: when the receiving the communication data fails, feed back, according to the hybrid automatic repeat request HARQ timing relationship, the receiving failure indication of the communication data to the base station;

a searching module, configured to search for the retransmitted communication data on at least one available unlicensed channel of the unlicensed cell according to a HARQ timing relationship;

The data receiving module is configured to receive the communication data after searching the communication data;

The receiving feedback module is configured to feed back, to the base station, a reception success indication of the communication data if the communication data is successfully decoded.
A base station, comprising: a receiver, a transmitter, a memory, and a processor, wherein the receiver, the transmitter, and the memory are respectively connected to the processor, and the memory stores a program code, The processor is configured to invoke the program code and perform the following operations:

Detecting whether the unlicensed cell is converted from the unavailable state to the available state; when the unlicensed cell is converted from the unavailable state to the available state, determining whether the agreed number of times is missed during the last unavailable state of the unlicensed cell The timing of the transmission of the specific communication information; if the transmission opportunity of the predetermined number of specific communication information is missed during the unavailable state of the unlicensed cell, the user equipment UE is additionally added by the unlicensed cell currently in the available state. Transmitting the specific communication information; wherein the transmission timing of the specific communication information and the number of appointments are configured or agreed in advance by the base station and the UE.
A user equipment, comprising: a receiver, a transmitter, a memory, and a processor, wherein the receiver, the transmitter, and the memory are respectively connected to the processor, and the memory stores a program code The processor is configured to invoke the program code and perform the following operations:

After receiving the unlicensed cell available indication sent by the base station, determining whether the subscription time of the specified number of specific communication information is missed during the last time the unlicensed cell is in an unavailable state; if it is in the unauthorized area Initiating the specific communication information receiving operation when a predetermined number of the specific communication information reception opportunities are missed during the unavailable state process; receiving the specific communication that the base station additionally transmits through the unauthorized cell currently in an available state Information; wherein the reception timing of the specific communication information and the number of appointments are configured or agreed in advance by the base station and the user equipment UE.