WO2018166471A1

WO2018166471A1 - Method and apparatus for uplink transmission

Info

Publication number: WO2018166471A1
Application number: PCT/CN2018/078978
Authority: WO
Inventors: 黄曲芳; 徐小英
Original assignee: 华为技术有限公司
Priority date: 2017-03-14
Filing date: 2018-03-14
Publication date: 2018-09-20
Also published as: CN108574983B; CN108574983A

Abstract

Disclosed are a method and apparatus for uplink transmission, belonging to the technical field of communications, and being able to improve the probability of correct reception of uplink data by means of a wireless access device in a plurality of air interface formats so as to improve the efficiency of uplink transmission in an NR system. The method comprises: a UE determining a start time of an uplink transmission time unit used for uplink transmission according to a TA quantity used; the UE determining, at least from a first air interface format and a second air interface format, a target air interface format required when executing uplink transmission, the length of a symbol in the first air interface format being greater than the length of a symbol in the second air interface format, and a first TA effective time period of a TA quantity in the first air interface format being greater than a second TA effective time period of a TA quantity in the second air interface format; and when the start time of the uplink transmission time unit is reached, if the TA effective time period of the target air interface format has not ended, the UE using the target air interface format to execute uplink transmission.

Description

Uplink transmission method and device

The present application claims the priority of the Chinese Patent Application, which is filed on March 14, 2017, the Chinese Patent Application No. PCT Application No. .

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to an uplink transmission method and apparatus.

Background technique

In a long term evolution (LTE) system, each user equipment (UE) in a cell can be synchronized with a wireless access device (eg, a base station) by a timing advance (TA) amount, thereby Determine the time when the UE sends the uplink subframe when the uplink transmission is performed. As shown in FIG. 1 , the UE determines that the time of the downlink subframe 1 sent by the base station is T1, and the UE shifts forward according to the foregoing TA amount, and can determine the start time T2 of sending the uplink subframe 2 to the base station, and subsequently, when T2 When the time comes, the UE can transmit uplink to the base station through the uplink subframe 2. However, the base station and the UE have a certain transmission delay. If the base station does not receive the uplink subframe 2 within a certain period of time, the uplink data sent by the UE through the uplink subframe 2 cannot be correctly received.

Since the distance between the UE and the base station is changed in real time, in order to ensure that the base station can correctly receive the uplink subframe 2 sent by the UE, the effective duration of the TA amount can be set in each uplink transmission process, for example, Each time the UE updates the amount of TA used by it, a timing advance timer (TAT) is started, as shown in FIG. 1, so that when the T2 time comes, only when the TAT has not timed out, That is, when the currently used TA amount is valid, the UE is allowed to perform uplink transmission with the base station through the uplink subframe 2.

In the new radio (NR) defined by the fifth generation mobile communication system, there may be multiple configuration parameters of the air interface format in a cell, for example, a numerology. By setting these configuration parameters, the length of the symbol in different air interface formats can be different. For example, as shown in FIG. 2, the length of one symbol in the air interface format 1 is the length of four symbols in the air interface format 2. Since the configuration parameters in different air interface formats may be different, how to use these different air interface formats for effective uplink transmission becomes an urgent problem to be solved.

Summary of the invention

An embodiment of the present invention provides an uplink transmission method and apparatus, which can improve the probability that a wireless access device correctly receives uplink data in multiple air interface formats, so as to improve uplink transmission efficiency in an air interface of a fifth generation mobile communication system.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides an uplink transmission method, including: determining, by a UE, a start time of an uplink transmission time unit for uplink transmission according to a TA amount used by the UE; and further, the UE may at least from the first air interface format And the second air interface format (the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format), determining a target air interface format required to perform the current uplink transmission, where the TA is in the first air interface format The first TA effective duration of the quantity is greater than the second TA effective duration of the TA quantity in the second air interface format; then, when the start time of the uplink transmission time unit comes, if the TA effective duration corresponding to the target air interface format is not ended That is, the amount of the foregoing TA is still valid in the target air interface format, and the UE can perform the uplink transmission by using the target air interface format.

In the embodiment of the present invention, the effective time of the TA amount that is set each time in the second air interface format is shorter, and the effective time of the TA amount that is set each time in the first air interface format is longer. The reason is that the CP time window in the second air interface format with a shorter symbol length is smaller than the CP time window in the first air interface format with a longer symbol length, when the second TA valid time corresponding to the second air interface format is shorter. The UE uses the second air interface format to transmit the uplink transmission time unit, which can improve the probability that the uplink transmission time unit received by the wireless access device falls within its CP time window. The CP time window in the first air interface format is large. Therefore, when the first TA effective time length corresponding to the first air interface format is long, the uplink transmission time unit received by the wireless access device falls within its CP time window. The probability is still high. In this way, the probability that the wireless access device correctly receives the uplink transmission time unit can be improved while the TA amount is not frequently updated, thereby improving the uplink transmission efficiency in the NR system.

In a first possible implementation manner of the first aspect, when the start time of the uplink transmission time unit comes, the method further includes: if the TA effective duration corresponding to the target air interface format is ended, that is, If the above TA amount is invalid in the target air interface format, the UE may cancel the uplink transmission.

Based on the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, when the first TA valid duration is not ended, and the second TA valid duration ends, the UE is released The uplink configuration resource configured on the second air interface format, where the uplink configuration resource includes at least one of a PUCCH resource, an SRS resource, a HARQ feedback resource, and a PUSCH resource. In this way, after the second TA effective duration is over, the UE performs uplink transmission by using the uplink configuration resources, thereby reducing the risk that the uplink transmission time unit received by the wireless access device falls outside its CP time window.

In a third possible implementation manner of the first aspect, the target air interface format is a second air interface format, and the target air interface format is corresponding to the second possible implementation manner. The validity period of the TA is the effective duration of the second TA. The method further includes: when the first TA valid period ends, the method further includes: sending, by the UE, the first indication information to the wireless access device by using the first air interface format. The first indication information is used to notify the wireless access device that the second TA validity period has ended. Then, after receiving the first indication information, the wireless access device may re-transmit an instruction for updating the amount of TA used by the UE to trigger the UE to re-determine the start time of the uplink transmission time unit and start timing. The validity time of the second TA is definitely not finished, and the UE can perform a new uplink transmission by using the second air interface format (ie, the target air interface format).

In a fourth possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, when the first TA valid duration ends, the second TA valid duration ends The UE releases the configured uplink configuration resource in the first air interface format, where the uplink configuration resource includes at least one of a PUCCH resource, an SRS resource, a HARQ feedback resource, and a PUSCH resource. Therefore, after the end of the first TA effective period, the UE still uses the uplink configuration resources to perform uplink transmission with the radio access device, thereby reducing the uplink transmission time unit received by the radio access device from falling outside the CP time window. risk.

In a fifth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, when the first TA valid duration ends, the second TA valid duration ends The method further includes: the UE initiating random access to the wireless access device on the third air interface format (the third air interface format is any one of the air interface format sets to which the LCH of the uplink data to be transmitted belongs) Establish a connection relationship between the UE and the wireless access device.

According to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the UE, according to the priority of the LCH in each air interface format in the air interface format set, from the air interface format set Determine one as the third air interface format.

According to the fifth or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the UE receives the second indication information that is sent by the wireless access device, where the second indication information includes at least An index of the fourth air interface format, where the fourth air interface format is any air interface format except the third air interface format; the UE initiates random access to the wireless access device in the at least one fourth air interface format. In this way, the random access initiated by the UE can be dispersed into other multiple air interface formats, thereby reducing the collision phenomenon caused by multiple UEs simultaneously transmitting random access in the same air interface format.

According to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the UE initiates random access to the wireless access device in the at least one fourth air interface format, including: Determining, by the at least one fourth air interface format, an air interface format that satisfies a random access condition, where the random access condition includes at least one of an air interface format supported by the UE and a bandwidth range supported by the UE; the UE Random access is initiated to the wireless access device on an air interface format that satisfies the random access condition.

Based on any one of the first aspect to the eighth possible implementation of the first aspect, in a ninth possible implementation of the first aspect, when the instruction for updating the amount of TA used by the UE is acquired The UE starts a first time advance timer TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format. The time duration of the first TAT is the first TA effective duration, and the timing of the second TAT. The duration is the effective duration of the second TA.

In a tenth possible implementation manner of the first aspect, the UE receives the configuration information sent by the wireless access device, where the first aspect is used in any one of the ninth possible implementation manners of the first aspect, where The configuration information includes a correspondence between the first air interface format and the first TA effective duration, and a correspondence between the second air interface format and the second TA effective duration.

In a second aspect, an embodiment of the present invention provides a random access method, including: a UE initiates random access to a wireless access device in a first air interface format; and the UE receives indication information sent by the wireless access device, where the indication information is The index includes at least one candidate air interface format, and the candidate air interface format is any air interface format except the first air interface format. In addition, the UE initiates random access to the wireless access device in at least one candidate air interface format.

Based on the second aspect, in a first possible implementation manner of the second aspect, the UE initiates random access to the radio access device in the at least one candidate air interface format, including: determining, by the UE, from at least one candidate air interface format that the content is satisfied. An air interface format of a random access condition, where the random access condition includes at least one of an air interface format supported by the UE and a bandwidth range supported by the UE; and the UE initiates to the wireless access device in an air interface format that satisfies the random access condition. Random access.

In a third aspect, an embodiment of the present invention provides an uplink transmission method, including: determining, by a radio access device, a first TA effective duration of a TA amount in a first air interface format for a UE, and the TA amount in a second air interface format. The second TA effective duration, wherein the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, the first TA effective duration is greater than the second TA effective duration; the wireless access device The UE sends configuration information, where the configuration information carries a correspondence between the first air interface format and the first TA effective duration, and a correspondence between the second air interface format and the second TA effective duration.

According to the third aspect, in a first possible implementation manner of the third aspect, when the first TA valid duration is not ended, and the second TA valid duration ends, the method further includes: the wireless access device receiving the UE And sending the first indication information, where the first indication information is used to notify the wireless access device that the second TA validity period has ended.

According to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, when the first TA valid duration ends and the second TA valid duration ends, the method further The method includes: the wireless access device establishes a connection with the UE by using random access on the first air interface format.

According to a second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the method further includes: the wireless access device sends the second indication information to the UE, where the second indication information includes An index of at least one candidate air interface format, where the candidate air interface format is any air interface format except the first air interface format.

In a fourth aspect, an embodiment of the present invention provides a UE, including: a determining unit, configured to: determine, according to a used time advance TA amount, a start time of an uplink transmission time unit for uplink transmission; and, at least from the first The target air interface format required for performing the uplink transmission is determined in the air interface format and the second air interface format, where the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, and the number of the TA amount in the first air interface format The effective duration of the TA is greater than the second TA effective duration of the TA amount in the second air interface format; the execution unit is configured to: when the start time of the uplink transmission time unit comes, if the TA effective time of the target air interface format If not, the uplink transmission is performed using the target air interface format.

According to the fourth aspect, in a first possible implementation manner of the fourth aspect, the performing unit is further configured to: when the start time of the uplink transmission time unit comes, if the TA effective time corresponding to the target air interface format has been When it is finished, the uplink transmission is cancelled.

According to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the executing unit is further configured to: when the first TA valid duration is not ended, the second TA is valid At the end of the duration, the uplink configuration resource configured in the second air interface format is released, and the uplink configuration resource includes at least one of a PUCCH resource, an SRS resource, a HARQ feedback resource, and a PUSCH resource.

In a third possible implementation manner of the fourth aspect to the fourth aspect, in the third possible implementation manner of the fourth aspect, the target air interface format is a second air interface format, the target air interface format The corresponding TA effective duration is the second TA effective duration, and the UE further includes: a sending unit, configured to: when the first TA valid duration is not ended, and when the second TA valid duration ends, use the first air interface format to the wireless access The device sends the first indication information, where the first indication information is used to notify the wireless access device that the second TA validity period has ended.

Based on any one of the third possible implementation manners of the fourth aspect to the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the execution unit is further configured to: when the first TA is valid After the second TA valid duration ends, the uplink configuration resource configured in the first air interface format is released, and the uplink configuration resource includes at least one of a PUCCH resource, an SRS resource, a HARQ feedback resource, and a PUSCH resource.

Based on any one of the fourth possible implementation manners of the fourth aspect to the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the UE further includes: a random access unit, configured to: when The first TA valid duration ends, and when the second TA valid duration ends, the random access is initiated to the wireless access device in the third air interface format, where the third air interface format is the air interface to which the logical channel LCH of the uplink data to be transmitted belongs. Any of the format collections.

The fifth possible implementation manner of the fourth aspect, in the sixth possible implementation manner of the fourth aspect, the determining unit is further configured to: according to the priority of the LCH in each air interface format in the air interface format set Determining one of the air interface format sets as the third air interface format.

According to the fifth or sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the UE further includes an acquiring unit, where the acquiring unit is configured to receive, by the wireless access device, a second indication information, where the second indication information includes an index of at least one fourth air interface format, where the fourth air interface format is any air interface format except the third air interface format; the random access unit is further configured to: at the at least one The fourth air interface format initiates random access to the wireless access device.

The seventh possible implementation manner of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the determining unit is further configured to: determine, from the at least one fourth air interface format, that one meets a random access condition The air interface format includes at least one air interface format supported by the UE and at least one of the bandwidth ranges supported by the UE; the random access unit is specifically configured to: in an air interface format that satisfies the random access condition A random access is initiated to the wireless access device.

Based on any one of the eighth possible implementation manners of the fourth aspect to the fourth aspect, in a ninth possible implementation manner of the fourth aspect, when the instruction for updating the amount of TA used by the UE is acquired The execution unit is further configured to: start a first time advance timer TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format, where the time duration of the first TAT is the first TA effective duration The timing of the second TAT is the effective duration of the second TA.

According to any one of the ninth possible implementation manners of the fourth aspect to the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the acquiring unit is further configured to: receive the wireless access device The configuration information that is sent, the configuration information includes a correspondence between the first air interface format and the first TA effective duration, and a correspondence between the second air interface format and the second TA effective duration.

In a fifth aspect, an embodiment of the present invention provides a radio access device, including: a determining unit, configured to determine, for a UE, a first TA effective duration of a TA amount in a first air interface format, and in a second air interface format, The second TA effective duration of the TA quantity, wherein the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, the first TA effective duration is greater than the second TA effective duration; the transmission unit is configured to The configuration information is sent to the UE, where the configuration information carries a correspondence between the first air interface format and the first TA effective duration, and a correspondence between the second air interface format and the second TA effective duration.

According to the fifth aspect, in a first possible implementation manner of the fifth aspect, the transmitting unit is further configured to: when the first TA valid duration is not ended, and when the second TA valid duration ends, receive the UE sending The first indication information is used to notify the wireless access device that the second TA validity period has ended.

According to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the transmitting unit is further configured to: when the first TA valid duration ends, the second TA At the end of the effective duration, a connection is established with the UE by random access on the first air interface format.

According to a second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the transmitting unit is further configured to: send, to the UE, second indication information, where the second indication information includes at least one An index of the candidate air interface format. The candidate air interface format is any air interface format except the first air interface format.

In a sixth aspect, an embodiment of the present invention provides a UE, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when the UE is running The processor executes the computer-executed instructions stored by the memory to cause the UE to perform any of the uplink transmission methods described above.

According to a seventh aspect, an embodiment of the present invention provides a wireless access device, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute an instruction, and the processor is connected to the memory through the bus. When the wireless access device is in operation, the processor executes the computer stored instructions stored in the memory to cause the wireless access device to perform any of the above uplink transmission methods.

According to an eighth aspect, an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores an instruction, when the instruction is executed on any one of the UEs, enabling the UE to perform any one of the foregoing uplink transmissions. method.

According to a ninth aspect, an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores an instruction, when the instruction is run on any one of the wireless access devices, causing the wireless access device to perform Any of the above uplink transmission methods.

In a tenth aspect, an embodiment of the present invention provides a computer program product, including an instruction, when the UE is running on any of the foregoing UEs, to enable the UE to perform any of the foregoing uplink transmission methods.

In an eleventh aspect, an embodiment of the present invention provides a computer program product, including instructions, when the wireless access device is configured to perform any of the foregoing uplink transmission methods.

In the embodiment of the present invention, the names of the UE and the wireless access device are not limited to the device itself. In actual implementation, the devices may appear under other names. As long as the functions of the respective devices are similar to the embodiments of the present invention, they are within the scope of the claims and the equivalents thereof.

In addition, the technical effects brought by the design method of any one of the second aspect to the eleventh aspect can be referred to the technical effects brought by different design methods in the above first aspect, and details are not described herein again.

DRAWINGS

1 is a schematic diagram of a usage scenario of a TA amount in the prior art;

2 is a schematic diagram of different air interface formats in the NR system;

FIG. 3 is a schematic structural diagram of a system of an uplink transmission system according to an embodiment of the present disclosure;

4 is a schematic diagram of a usage scenario of a TA amount in different air interface formats in the prior art;

FIG. 5 is a schematic diagram of an application scenario of an uplink transmission method according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram 1 of a UE according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram 1 of a wireless access device according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart diagram of an uplink transmission method according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of a random access method according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram 2 of a UE according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram 2 of a wireless access device according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram 3 of a UE according to an embodiment of the present disclosure.

detailed description

In the following, the terms "first" and "second" are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specified.

The embodiment of the present invention provides an uplink transmission method, which is applicable to the uplink transmission system shown in FIG. 3, and includes a wireless access device 11 and at least one user equipment 12.

User equipment (UE) 12, which may also be called a terminal, may specifically be a mobile phone, a tablet computer, a notebook computer, a UMPC (Ultra-mobile Personal Computer), a netbook, a PDA (Personal Digital Assistant, an individual). The digital assistant), the in-vehicle terminal in the Internet of Vehicles, and the radio frequency identifier in the Internet of Things, etc., are not limited in this embodiment of the present invention.

The radio access device 11 may be an access point (AP), a base station (for example, a macro base station, a micro base station, a repeater, etc.), and the embodiment of the present invention does not impose any limitation.

In addition, the transmission time unit involved in the embodiment of the present invention may specifically include an uplink transmission time unit and a downlink transmission time unit. The uplink transmission time unit refers to a time granularity for uplink transmission, and the downlink transmission time unit refers to a time granularity for downlink transmission. The transmission time unit may specifically be a subframe, a symbol, a slot, a mini-slot, an aggregation slot or an aggregation microslot. Taking a subframe as an example, in an LTE system, the length of one subframe is generally 1 ms, and in the NR of a 5G (5th-Generation, fifth-generation mobile communication system), the length of one subframe can be connected by wireless. The device settings are not limited in this embodiment of the present invention.

In addition, in the NR system, a plurality of air interface formats can be configured in one cell by numerology parameters. Wherein, for any two air interface formats, when at least one parameter in the parameters of the subcarrier spacing, the symbol length, and the cyclic prefix (CP) time window are different, the two air interface formats are Different air interface formats.

Then, in a different air interface format, the first air interface format with a longer symbol length and the second air interface format with a shorter symbol length are used as an example, and the UE can determine an uplink transmission time unit for uplink transmission according to the same TA amount. The start time, at this time, the start time of the uplink transmission time unit is the same in the first air interface format and the second air interface format. However, in an aspect of the embodiment of the present invention, different TA effective durations may be respectively set for the first air interface format and the second air interface format. For example, the TA effective duration (ie, the first TA effective duration) of the TA amount set in the first air interface format is greater than the TA effective duration (ie, the second TA effective duration) of the TA amount in the second air interface format.

If the UE determines to perform uplink transmission using the first air interface format, when the start time of the uplink transmission time unit comes, if the first TA validity period has not ended, the UE may perform the current uplink transmission, otherwise, the UE cancels the current time. Uplink transmission. Correspondingly, if the UE determines to perform uplink transmission using the second air interface format, when the start time of the uplink transmission time unit comes, if the second TA validity period has not ended, the UE may perform the current uplink transmission, otherwise, the UE Cancel this upstream transmission. In this way, the UE can manage the uplink transmission process in different air interface formats by using the effective duration of the TA in different air interface formats, thereby improving the uplink transmission efficiency in multiple air interface formats.

Further, the foregoing CP time window refers to a time range in which the wireless access device can correctly receive the uplink transmission time unit sent by the UE. When the time when the wireless access device receives the uplink transmission time unit is located in the CP time window, the uplink data in the uplink transmission time unit may be correctly received by the wireless access device; otherwise, the wireless access device cannot correctly receive the UE. Upstream data.

As shown in FIG. 4, in the air interface format 1 and the air interface format 2, the CP time window in the air interface format 1 with a large symbol length is long, and the CP time window in the air interface format 2 with a small symbol length is short. At this time, as shown in FIG. 4, regardless of the air interface format, the UE can determine the time T3 at which the uplink transmission time unit is transmitted according to the amount of TA currently used. When the T3 time comes, if the TAT does not time out, the UE can complete the uplink transmission using the air interface format 1 or the air interface format 2.

However, if the timing of the TAT is long, that is, the effective time of the TA is long, then for the air interface format 2, as shown in FIG. 4, when the T3 time comes, the TAT still does not time out. At this time, due to its CP time window Short, the uplink subframe sent by the UE using air interface format 2 is likely to fall outside its CP time window. However, if the timing of the TAT is short, that is, the effective time of the TA is short, the UE needs to frequently update the amount of TA used by the UE, which increases the uplink transmission cost. Moreover, the UE may need to use the air interface format 2 for uplink transmission in a few cases, and frequently updating the amount of TA used by the UE undoubtedly wastes a large amount of transmission resources.

In this case, in the uplink transmission method provided by the embodiment of the present invention, a plurality of air interface formats in a cell may be divided into a plurality of types of air interface formats, for example, at least a first air interface format and a second air interface format. The length of the symbol in any air interface format in the first air interface format is greater than the length of the symbol in each air interface format in the second air interface format. Moreover, since the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, the CP time window in the first air interface format can be set correspondingly larger, and the CP time window in the second air interface format is correspondingly larger. It is also correspondingly smaller.

Correspondingly, the wireless access device can set a corresponding TA effective duration for each air interface format, for example, setting the first TA effective duration to correspond to the first air interface format, and setting the second TA effective duration and the second air interface format. Correspondingly, the first TA effective duration is greater than the second TA effective duration.

Then, as shown in FIG. 5, during uplink transmission, the UE may update the TA used by itself according to an instruction received from the wireless access device for updating the amount of TA used by the UE, for example, a TA command (TA command). the amount. Further, the UE may calculate a start time T of an uplink transmission time unit for uplink transmission according to the TA amount and a start time of the downlink transmission time unit, where the uplink transmission time unit is the uplink in FIG. 5 in the first air interface format. The transmission time unit A, in the second air interface format, the uplink transmission time unit is the uplink transmission time unit B in FIG. 5, that is, the same TA amount is applicable to each air interface format before being updated. At the same time, after receiving the foregoing instruction for updating the amount of TA used by the UE, the UE triggers the UE to start timing, wherein the TA amount is valid only for the first air interface format within the first TA effective duration, and the TA amount is only in the The second TA valid period is valid for the second air interface format.

The UE may determine the target air interface format required for performing the uplink transmission from the first air interface format and the second air interface format, for example, the determined target air interface format is the second air interface format. Then, when the start time T of the uplink transmission time unit B comes, if the TA effective duration corresponding to the second air interface format (that is, the second TA effective duration) has ended, the UE may determine that the second air interface format is unavailable. The uplink transmission is performed, thereby canceling the current uplink transmission; if the second TA effective duration is not yet completed, the UE may determine that the second air interface format can be used for uplink transmission, thereby performing the uplink transmission using the second air interface format.

It can be seen that, in the embodiment of the present invention, the same TA quantity is set for all kinds of air interface formats in the cell, but different TA effective durations are set for different types of air interface formats, that is, each time in the second air interface format is set. The updated TA amount has a shorter effective time, and the TA amount set for each update in the first air interface format has a longer effective time. The reason is that the CP time window in the second air interface format is smaller than the CP time window in the first air interface format. When the second TA effective time length corresponding to the second air interface format is shorter, the UE uses the second air interface format to transmit the uplink transmission time. The unit can improve the probability that the uplink transmission time unit received by the wireless access device falls within its CP time window. The CP time window in the first air interface format is large. Therefore, when the first TA effective time length corresponding to the first air interface format is long, the probability that the uplink transmission time unit received by the wireless access device falls within its CP time window. Still higher.

Illustratively, the radio access device may determine, according to the size of the CP time window and the speed of the UE in different air interface formats, the effective duration of the foregoing TA amount in different air interface formats, for example, the wireless access device according to the first The size of the CP time window in the air interface format and the speed of the UE, the first TAT configuration parameter for indicating the validity time of the first TA in the first air interface format is generated for the UE, and the wireless access device may also be according to the second The size of the CP time window in the air interface format and the speed of the UE, the second TAT configuration parameter for indicating the second TA effective duration in the second air interface format is generated for the UE. In addition, the wireless access device sends the first TAT configuration parameter and the second TAT configuration parameter to the UE, and when the UE receives the TA command, simultaneously starts the first TAT corresponding to the first TAT configuration parameter, and the second TAT. The second TAT corresponding to the configuration parameter.

In the embodiment of the present invention, the TA effective duration adapted to the CP time window size can be set for different types of air interface formats, as compared with the prior art TA effective time length for all the air interface formats. Specifically, when the length of the symbol in the air interface format is long, the corresponding CP time window is large, and even if the effective duration of the TA (ie, the first TA effective duration) is set in the air interface format, the wireless access is long. The probability that the uplink transmission time unit received by the device falls within its CP time window is still high; correspondingly, when the length of the symbol in the air interface format is short, the corresponding CP time window is small, then it can be set in the The effective duration of the TA (the second TA effective duration) in the air interface format is shorter to reduce the probability that the uplink transmission time unit received by the wireless access device falls outside its CP time window. It can be seen that by setting the effective duration of the TA for the different types of air interface formats to adapt to the CP time window size, the probability that the wireless access device correctly receives the uplink transmission time unit can be improved while not updating the TA amount frequently, thereby improving the probability Uplink transmission efficiency in the air interface of the fifth generation mobile communication system.

It should be noted that, in the embodiment of the present invention, only the air interface formats of the first air interface format and the second air interface format are illustrated. It can be understood that a cell may include an N (N>1) air interface format, and One or more air interface formats may be included in each air interface format, which is not limited in this embodiment of the present invention.

For the hardware structure of the UE in the embodiment of the present invention, reference may be made to the components of the UE shown in FIG. 6.

As shown in FIG. 6, the foregoing UE may specifically include: a radio frequency (RF) circuit 320, a memory 330, an input unit 340, a display unit 350, a gravity sensor 360, an audio circuit 370, a processor 380, and a power source 390. component. Those skilled in the art will appreciate that the UE structure illustrated in FIG. 6 does not constitute a limitation to the UE, may include more or fewer components than illustrated, or combine some components, or different component arrangements.

The following describes the components of the UE in detail with reference to FIG. 6:

The RF circuit 320 can be used for receiving and transmitting information during the transmission or reception of information or during a call. In particular, after receiving the downlink information of the wireless access device, the processor 380 processes the uplink information. In addition, the uplink data is sent to the wireless access device. . Generally, RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, and the like. In addition, RF circuitry 320 can also communicate with the network and other devices via wireless communication.

The memory 330 can be used to store software programs and modules, and the processor 380 executes various functional applications and data processing of the UE by running software programs and modules stored in the memory 330.

The input unit 340 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the UE. Specifically, the input unit 340 may include a touch panel 341 and other input devices 342.

The display unit 350 can be used to display information input by the user or information provided to the user as well as various menus of the UE. The display unit 350 may include a display panel 351. Alternatively, the display panel 351 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

The UE may also include a gravity sensor 360 and other sensors, such as a light sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., and details are not described herein.

Audio circuitry 370, speaker 371, microphone 372 can provide an audio interface between the user and the UE. The audio circuit 370 can transmit the converted electrical data of the received audio data to the speaker 371, and convert it into a sound signal output by the speaker 371; on the other hand, the microphone 372 converts the collected sound signal into an electrical signal, by the audio circuit 370. After receiving, it is converted into audio data, and then the audio data is output to the RF circuit 320 for transmission to, for example, another UE, or the audio data is output to the memory 330 for further processing.

The processor 380 is the control center of the UE, and connects various parts of the entire UE using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 330, and calling data stored in the memory 330, executing The UE performs various functions and processes data to monitor the UE as a whole. Alternatively, processor 380 can include one or more processing units.

Although not shown, the UE may further include a power supply, a wireless (Fidelity Fidelity) module, a Bluetooth module, and the like, and details are not described herein.

The hardware structure of the wireless access device in the embodiment of the present invention can be referred to FIG. 7.

As shown in FIG. 7, the radio access device includes: a baseband unit (BBU), a radio remote unit (RRU), and an antenna. The BBU and the RRU can be connected by using an optical fiber, and the RRU is re-passed. The coaxial cable and the power splitter (coupler) are connected to the antenna, and generally one BBU can be connected to multiple RRUs.

The RRU can include four modules: a digital intermediate frequency module, a transceiver module, a power amplifier module, and a filtering module. The digital intermediate frequency module is used for modulation and demodulation of optical transmission, digital up-conversion, digital-to-analog conversion, etc.; the transceiver module completes the conversion of the intermediate frequency signal to the radio frequency signal; and after the amplification of the power amplifier module and the filtering of the filtering module, the RF signal is transmitted through the antenna. Launched.

The BBU is used to complete the baseband processing functions (encoding, multiplexing, modulation, and spreading) of the air interface (ie, the interface between the UE and the wireless access device), the radio network controller (RNC), and the wireless connection. The interface function of the logical interface between the devices, signaling processing, local and remote operation and maintenance functions, and the working status monitoring and alarm information reporting function of the wireless access device.

Hereinafter, an uplink transmission method provided by an embodiment of the present invention is described in detail in conjunction with a specific embodiment. As shown in FIG. 8, the method includes:

700. The UE receives the configuration information sent by the wireless access device, where the configuration information includes a correspondence between the first air interface format and the first TAT, and a correspondence between the second air interface format and the second TAT.

The length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, and the CP time window in the first air interface format is larger than the CP time window in the second air interface format; the time duration of the first TAT is greater than The timing of the second TAT.

Before the UE performs the uplink transmission, the radio access device may pre-divide the N air interface formats in the cell where the UE is located, for example, divide the N air interface formats into the first air interface format and the second air interface format according to the size of the CP time window. The CP time window in the first air interface format is larger than the CP time window in the second air interface format. Moreover, the wireless access device sets a TAT for each air interface format to implement the timing of the effective duration of the same TA amount in each air interface format. For example, the first TAT is set for the first air interface format, and the second TAT is set for the second air interface format, and the time duration of the first TAT is greater than the time duration of the second TAT.

In step 700, the wireless access device carries the corresponding relationship between the first air interface format and the first TAT, and the correspondence between the second air interface format and the second TAT in the configuration information, and sends the information to the configuration information. UE. In this way, the UE can determine the effective duration of the TA amount in different air interface formats according to the correspondence between the different air interface formats and the TAT in the configuration information.

In addition, after receiving the foregoing configuration information, the UE may send a response response to the wireless access device, that is, notify the wireless access device that the UE has received the configuration information.

701. The UE receives a TA command sent by the wireless access device, where the TA command is used to update the amount of TA used by the UE.

702. The UE determines, according to the updated TA quantity, a start time of an uplink transmission time unit used for uplink transmission.

The start time of the uplink transmission time unit determined by the UE using the updated TA amount may be a time point, that is, a start time of the uplink transmission time unit, or may be a time range, for example, an uplink transmission time unit. The starting time is T4-T5. At this time, the starting time of the uplink transmission time unit may be any time in T4-T5.

Exemplarily, the UE may forward the determined start position of the downlink transmission time unit to the time after the updated TA amount as the start time of the uplink transmission time unit.

The specific value of the foregoing TA is changed according to the distance between the UE and the wireless access device. Therefore, if the wireless access device does not adjust the TA amount for a long time, the amount of TA saved by the UE may be invalid. If the UE determines the starting position of the uplink transmission time unit by using the dead TA amount, the radio access device cannot correctly receive the uplink transmission time unit sent by the UE.

Thus, the wireless access device can periodically or aperiodically send a TA command to the UE to update its TA amount, eg, a TA command. The TA command may directly carry the specific value of the amount of the TA that the UE needs to update. In this case, the UE may directly update the currently used TA amount to the specific value of the TA amount carried in the first indication information. Alternatively, the TA command may also carry a TA offset, and the UE subsequently adjusts the TA amount according to the TA offset according to the current TA offset, and obtains the updated TA amount, which is used by the embodiment of the present invention. No restrictions are imposed.

In steps 701-702, after receiving the TA command, the UE may determine the updated TA amount according to the above method. Furthermore, the UE may offset the TA amount forward based on the determined start time of the downlink transmission time unit, thereby obtaining the start time of the uplink transmission time unit.

Subsequently, when the UE needs to send uplink data to the radio access device, the UE may send the uplink data to the radio access device by using the corresponding uplink transmission resource when the uplink transmission time unit arrives.

703. The UE starts a first TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format.

After the UE performs step 701, that is, after receiving the first indication information, the UE may be triggered to perform step 703, that is, start a first TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format. In addition, in the implementation of the present invention, starting a TAT, for example, starting the first TAT means: if the first TAT has not been started, triggering the first TAT to start timing, and if the first TAT is currently running, triggering the first TAT Start timing again.

It should be noted that the embodiment of the present invention does not limit the sequence between step 702 and step 703. After performing step 701, the UE may perform steps 702 and 703 at the same time.

704. The UE determines, from the first air interface format and the second air interface format, a target air interface format that is required to perform the uplink transmission.

In step 704, when the UE needs to send uplink data to the radio access device, the radio access device allocates uplink transmission resources for uplink transmission to the UE, and each type of uplink transmission resource uniquely corresponds to an air interface format, so After obtaining the uplink transmission resource, the UE may determine an air interface format corresponding to the uplink transmission resource when performing the uplink transmission, for example, the air interface format A. If the air interface format A belongs to the first air interface format, the UE may determine that the target air interface format is the first air interface format. If the air interface format A belongs to the second air interface format, the UE may determine that the target air interface format is the second air interface format.

705. When the start time of the uplink transmission time unit arrives, if the TAT corresponding to the target air interface format has ended, the UE determines that the target air interface format cannot be used for uplink transmission, and if the TAT corresponding to the target air interface format is not ended, the UE determines The target air interface format can be used for uplink transmission.

In step 705, when the start time of the uplink transmission time unit determined in step 702 comes, the UE determines whether the TAT corresponding to the target air interface format ends. The second air interface format is used as the target air interface format. In this case, the TAT corresponding to the target air interface format is the second TAT. If the second TAT is ended, that is, the state of the second TAT is the timeout state, the second air interface is indicated. The effective duration of the TA amount in the format has been completed. At this time, the second air interface format is not used to complete the uplink transmission. Correspondingly, if the second TAT has not ended yet, that is, the state of the second TAT is the timing state, The current amount of the TA is still valid in the second air interface format. Then, the UE may determine that the second air interface format is available for uplink transmission. Subsequently, the UE may use the second air interface format to complete the current uplink transmission resource.

In the embodiment of the present invention, the timing of the first TAT is greater than the timing of the second TAT, that is, the effective duration of the TA amount in the first air interface format is greater than the effective duration of the TA amount in the second air interface format.

In this way, for the second air interface format, since the CP time window is small, the uplink transmission time unit received by the wireless access device has a greater risk of falling outside of its CP time window, and therefore, the corresponding TA amount When the effective duration is also short, it can be ensured that the uplink transmission time unit received by the wireless access device falls within the CP time window within the effective duration of the TA amount, and the probability of exceeding the second TAT time period is exceeded. Afterwards, the UE cannot use the second air interface format for uplink transmission, thereby reducing the risk that the uplink transmission time unit received by the wireless access device falls outside its CP time window.

Correspondingly, for the first air interface format, since the CP time window is large, the uplink transmission time unit received by the wireless access device has a small risk of falling outside its CP time window, and therefore, even its corresponding TA When the effective duration of the quantity is also long, it can also ensure that the uplink transmission time unit received by the wireless access device falls within the CP time window within the effective duration of the TA amount, so that the wireless access device does not need to The UE is frequently instructed to update the TA amount.

It can be seen that, in the embodiment of the present invention, by setting the TA effective duration that adapts to the CP time window size for different types of air interface formats, the wireless access device can correctly receive the uplink transmission time unit while not updating the TA amount frequently. The probability of increasing the uplink transmission efficiency in the NR system.

Further, in the embodiment of the present invention, different TA effective durations are set for different types of air interface formats, that is, a first TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format. Moreover, the timing of the first TAT is greater than the timing of the second TAT. Then, when the UE simultaneously starts the first TAT and the second TAT, three timing states occur. According to the order of time, the three timing states are: the first TAT has not timed out, and the second TAT has not timed out (timed state 1); the first TAT has not timed out, and the second TAT has timed out (timed state 2); The first TAT times out and the second TAT times out (timed state 3).

For the timing state 1, that is, the first TAT does not time out, and the second TAT does not time out, at this time, the above TA amount is valid in both the first air interface format and the second air interface format, then, regardless of the UE determining in step 704 The destination air interface format is the air interface format, and the UE can directly perform the uplink transmission by using the target air interface format.

The first TAT does not time out when the second TAT times out. At this time, the UE releases the configured uplink configuration on the second air interface format corresponding to the second TAT. Resources.

Specifically, the foregoing uplink configuration resource may include: a physical uplink control channel (PUCCH) resource configured on the second air interface format, and a sounding reference signal (SRS) resource is used. And a resource for transmitting hybrid automatic repeat reques (HARQ), and at least one of physical uplink shared channel (PUSCH) resources. In this way, after the second TAT timeout, the UE still uses the uplink configuration resources to perform uplink transmission, thereby reducing the risk that the uplink transmission time unit received by the wireless access device falls outside its CP time window.

In addition, some uplink configuration resources may be shared to the second air interface format and the first air interface format. For example, the radio access device configures the radio resource A for the UE, and the radio resource A can be used in the second air interface format. Used on the first air interface format. Then, when the UE performs the uplink transmission, the uplink transmission may be completed by using the second air interface format or the first air interface format according to the service type of the data to be sent.

When the second TAT times out, and the first TAT does not time out, since the TA amount is still valid in the first air interface format, that is, the first air interface format can still be used for uplink transmission, then, once the UE is released, This part of the uplink configuration resource may cause the UE to use the uplink configuration resource to complete the uplink transmission. Therefore, for this part of the uplink configuration resource, the UE may temporarily not process.

In addition, if there is a HARQ process in the second air interface format, the UE may clear the buffer corresponding to the HARQ process, because in the application scenario of the synchronous uplink non-adaptive retransmission, there is data in the cache corresponding to the HARQ process, and the UE The data may be automatically retransmitted. Therefore, after the UE clears the buffer corresponding to the HARQ process, the UE can be prevented from automatically retransmitting the data in the HARQ cache by using the amount of TA that has failed in the second air interface format.

When the second TAT expires, the timing state 2 is entered, that is, the first TAT does not time out, and the second TAT times out. At this time, the TA amount is valid in the first air interface format, and is invalid in the second air interface format. Then, when the target air interface format is the first air interface format, the UE may perform the uplink transmission by using the first air interface format (ie, the target air interface format).

When the target air interface format is the second air interface format, since the TA amount is invalid in the second air interface format, the UE may send the first indication to the wireless access device by using the first air interface format in which the TA amount is still valid. Information, the first indication information is used to notify the wireless access device that the second TAT has timed out.

Specifically, the first indication information may be a scheduling request (SR) indication or a buffer status report (BSR) indication, etc., and the embodiment of the present invention does not impose any limitation. For example, the UE may The second indication information is carried in a media access control (MAC) sub-header or a MAC CE (MAC Control Element) to be sent to the radio access device.

After receiving the first indication information, the radio access device may re-send the TA command to the UE to trigger the UE to re-determine the start time of the uplink transmission time unit, and restart the first TAT and the second TAT. In this way, the second TAT that is just started is usually not timed out. In this case, the UE can perform a new uplink transmission by using the second air interface format (ie, the target air interface format).

Further, when the first TAT also times out, the second TAT with a shorter timeout has timed out. At this time, the UE may further release the configured uplink configuration resources in the first air interface format.

Similarly, the foregoing uplink configuration resource may include: a PUCCH resource configured on the first air interface format, a resource used for transmitting the SRS, and at least one of a resource for transmitting HARQ feedback and a PUSCH resource. In this way, after the first TAT is timed out, the UE still uses these uplink configuration resources to perform uplink transmission with the wireless access device, thereby reducing the risk that the uplink transmission time unit received by the wireless access device falls outside its CP time window.

In addition, for the uplink configuration resource corresponding to the second air interface format and the first air interface format, the amount of the TA is invalid in the first air interface format and the second air interface format, that is, in the first air interface format and the second air interface format. Cannot be used for uplink transmission, therefore, the UE can release this part of the uplink configuration resources.

Further, when the first TAT expires, the timing state 3 is entered, that is, the first TAT times out, and the second TAT also times out. At this time, regardless of whether the target air interface format is the first air interface format or the second air interface format, the UE cannot use the uplink air interface format for the current uplink transmission, then the UE needs to initiate random access to the wireless access device to establish the UE and The connection relationship between wireless access devices.

For the specific method for the UE to initiate the random access to the radio access device, refer to steps 801-804 in the following embodiments, and details are not described herein again.

Further, in order to meet the large-capacity and high-rate transmission requirements of the mobile communication system, a high-frequency band greater than 6 GHz is introduced for communication to utilize its large-bandwidth, high-rate transmission characteristics. Since the path loss of the high frequency communication (ie, the attenuation generated during the transmission of the wireless signal between the UE and the wireless access device) is high, the UE can perform uplink with the wireless access device through a beam (or beam group). Transmission to ensure propagation distance and high beam gain. The beam refers to a spatial resource with energy transmission directivity. Correspondingly, a beam group refers to a group of spatial resources with energy transmission directivity.

At this time, the radio access device may configure the amount of TA corresponding to different beams (or beam groups) for each UE in each air interface format. For example, if the second air interface format includes three sets of beam groups, that is, beam group 1, beam group 2, and beam group 3, then each beam group can be configured to correspond to one TA amount. The multiple beams (or groups of beams) in the same air interface format may share the same TA effective duration, or may set a corresponding TA effective duration for each beam (or beam group).

Generally, when communicating in a high frequency band, the CP time window set by the wireless access device is generally small. Therefore, when the UE performs uplink transmission through a beam (or beam group) and a wireless access device in any air interface format, the TA The effective duration is generally less than the effective duration of the TA when communicating in the low frequency band.

At this time, the UE can still adjust the TA amount according to the TA command for updating the TA amount sent by the radio access device, except that the UE can determine which beam (or beam group) corresponding to the amount of TA needs to be updated.

In a possible implementation manner, the radio access device may directly carry the identifier of the target beam (or target beam group) corresponding to the TA quantity to be updated in the TA command, for example, the index of the beam group 1, such that the UE The amount of TA corresponding to beam group 1 can be updated based on the index.

In another possible implementation, the UE may use the beam (or beam group) used by the wireless receiving device to send the TA command as the target beam (or target beam group) corresponding to the amount of TA to be updated, and further determine Update the amount of TA corresponding to the target beam (or target beam group).

Optionally, after receiving the TA command, the UE starts the TAT corresponding to the target beam (or the target beam group). When the TAT times out, the UE only releases the uplink configuration resource corresponding to the target beam (or the target beam group). The uplink configuration resource corresponding to all the beams (or the beam groups) in the target air interface format to which the target beam (or the target beam group) belongs may be released, which is not limited in this embodiment of the present invention.

In addition, if the TATs of all the beams (or the beam groups) in a cell are timed out, the UE can release the UE and the cell in addition to the uplink configuration resources corresponding to all the beams (or beam groups) in the target air interface format. Corresponding data in the HARQ cache.

Further, after the first TAT and the second TAT enter the foregoing timing state 3, the UE cannot use the target air interface format for the first air interface format or the second air interface format, so the UE needs to use the current uplink transmission. Therefore, the UE needs to A random access is initiated to the wireless access device to establish a connection between the UE and the wireless access device.

Specifically, the embodiment of the present invention provides a random access method. As shown in FIG. 9, the method includes the following steps 801-804.

It should be noted that the random access method shown in the following steps 801-804 is applicable not only to the random access triggered by the first TAT timeout and the second TAT timeout (entry timing state 3), but also It is applied to the scenario in which random access is required in any scenario. For example, the process of performing radio resource control (RRC) connection re-establishment in the UE, the handover process, and the process of receiving downlink data in the RRC connection state, in the RRC connection state. The method of sending the uplink data or the random access that is triggered in the RRC connection state is applicable to the random access method provided in the following steps 801-804, which is not limited in this embodiment of the present invention.

801. The UE initiates random access to the wireless access device in a third air interface format.

Specifically, the UE may determine, according to a logical channel (LCH, logical channel) where the uplink data to be sent, a set of air interface formats to which the LCH belongs.

For example, the logical channel LCH of the uplink data to be sent is the LCH 1, and the air interface format corresponding to the LCH 1 is the first air interface format. Then, the set of all the air interface formats in the first air interface format can be used as the air interface format set. That is, the air interface format set to which the LCH 1 belongs is determined.

In the following, the UE may arbitrarily select a third air interface format from the air interface format set. For example, the LCH 1 has the highest priority in the air interface format A, that is, the air interface format A has the highest priority. A is in the third air interface format and initiates random access to the wireless access device in the third air interface format.

802. The UE receives the second indication information that is sent by the wireless access device, where the second indication information includes an index of the at least one fourth air interface format, where the fourth air interface format is any air interface format except the third air interface format.

At the same time, multiple UEs may initiate random access to the wireless access device on the same air interface format. If the number of UEs is too large, some UEs may not respond to random access successfully. In this case, the wireless access device may send the second indication information to the UE. For convenience of description, the following is referred to as a back off indication (other naming may also be used), and the backoff indication is used to indicate that the UE waits for a certain period of time. After random access is initiated again. For example, the backoff indication includes a time range of 200 milliseconds (ms) to 700 ms. Then, the UE can select a value between 200 ms and 700 ms, for example, 500 ms. Then, when the UE receives the foregoing backoff indication, wait Random access will be initiated again after 500ms.

In the embodiment of the present invention, when the number of UEs that initiate random access is greater than a certain threshold, the wireless access device may send the second indication information to one or more UEs that cannot successfully access, where the second indication information includes An index of at least one fourth air interface format, that is, indicating that the UE can continue to initiate random access on the fourth air interface format.

For example, an air interface format list may be defined in the protocol to indicate a correspondence between different air interface formats and air interface format indexes. In this way, the wireless access device may send the index of the available air interface format to the UE in the backing indication according to the air interface format list, and send the information to the UE according to the air interface format list. The air interface format corresponding to the index of the air interface format in the backoff indication in the air interface format list is the fourth air interface format.

Alternatively, the air interface format may be broadcasted by the system information of the cell in which the UE is located, and the mapping between the air interface format and the air interface format index may be indicated, so that the wireless access device carries the index of the fourth air interface format. After the fallback indication is sent to the UE, the UE determines that the air interface format corresponding to the index of the air interface format in the backoff indication is the fourth air interface format according to the air interface format list obtained from the system information.

It should be noted that the fourth air interface format may be one or multiple, and the embodiment of the present invention does not impose any limitation. When only one fourth air interface format is included, the UE may directly initiate random access to the wireless access device on the fourth air interface format; when multiple fourth air interface formats are included, the following steps 803-804 may be continued. 803. The UE determines, from the at least one fourth air interface format, an air interface format that satisfies a random access condition.

Exemplarily, the random access condition may specifically be a bandwidth range supported by the UE. For example, the bandwidth supported by the UE ranges from 3.5 GHz to 4.0 GHz. Then, if there are air interface formats that do not satisfy the bandwidth limitation of 3.5 GHz-4.0 GHz in the multiple fourth air interface formats indicated by the foregoing back indication, the UE determines It does not satisfy the random access condition; otherwise, the UE determines that it satisfies the above random access condition. For example, the random access condition may be at least one air interface format supported by the UE. Then, if there are air interface formats supported by the UE in the multiple fourth air interface formats indicated by the back indication, the UE determines that the random access is satisfied. The access condition; otherwise, if the air interface format supported by the UE does not exist in the multiple fourth air interface formats indicated by the back indication, the UE determines that the random access condition is met, and the UE may continue to be in the third The random access is initiated to the wireless access device again in the air interface format. Of course, if there are multiple air interface formats that satisfy the above random access conditions, the UE may randomly select one.

Alternatively, the radio access device may also send the random access condition to the UE in advance, so that the UE may also determine an air interface that satisfies the pre-acquired random access condition according to the random access condition acquired from the radio access device. format.

For example, the random access condition may be: when the path loss is greater than the first preset value, the UE selects the first air interface format indicated in the back indication, otherwise, the UE selects the second air interface indicated in the back indication format. For example, the random access condition may be: when the reason for triggering the random access is that the first TAT and the second TAT are timed out, the UE selects the first air interface format indicated in the back indication, otherwise, the UE selects the back indication. The second air interface format indicated in .

In this way, the UE can distribute the random access initiated by the UE to other air interface formats according to its own restriction condition and the reason for triggering the random access, thereby reducing multiple UEs to be simultaneously sent in the same air interface format. The conflict caused by random access.

It is to be understood that the foregoing only exemplifies a possible implementation of several random access conditions, and a specific random access condition may be set by a person skilled in the art according to actual experience, which is not limited in this embodiment of the present invention.

804. The UE initiates random access to the wireless access device on an air interface format that satisfies the foregoing random access condition.

The solution provided by the embodiment of the present invention is mainly introduced from the perspective of interaction between the network elements. It can be understood that, in order to implement the above functions, the foregoing UE, the wireless access device, and the like include a hardware structure and/or a software module corresponding to each function. Those skilled in the art will readily appreciate that the embodiments of the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the embodiments of the invention.

The embodiments of the present invention may perform the division of the function modules on the UE, the wireless access device, and the like according to the foregoing method. For example, each function module may be divided according to each function, or two or more functions may be integrated into one process. In the module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.

FIG. 10 is a schematic diagram of a possible structure of a UE involved in the foregoing embodiment, where the UE includes: an obtaining unit 91, a determining unit 92, a sending unit 93, Execution unit 94 and random access unit 95.

The obtaining unit 91 is configured to support the UE to perform the processes 700-701 in FIG. 8 and the 802 in FIG. 9; the determining unit 92 is configured to support the UE to perform the processes 702, 704-705 in FIG. 8 and 803 in FIG. 9; The sending unit 93 is configured to support the UE to send the first indication information to the wireless access device, where the first indication information is used to notify the wireless access device that the second TA validity period has ended. The random access unit 95 is for supporting the UE to perform the

processes

801 and 804 in FIG. For the description of the function of the corresponding function module, reference may be made to the foregoing method embodiments, and details are not described herein again.

FIG. 11 is a schematic diagram showing a possible structure of a radio access device involved in the foregoing embodiment, where the radio access device includes: a determining unit 101, and a transmission. Unit 102.

The determining unit 101 is configured to determine, for the user equipment UE, a first TA effective duration of the time advance TA amount in the first air interface format, and a second TA effective duration of the TA amount in the second air interface format, where the first The length of the symbol in the air interface format is greater than the length of the symbol in the second air interface format, and the first TA effective duration is greater than the second TA effective duration; the transmission unit 102 is configured to send configuration information to the UE, where the configuration information carries the first air interface format and the first Correspondence between a TA effective duration and a correspondence between the second air interface format and the second TA effective duration.

Further, the transmitting unit 102 is further configured to: when the first TA active duration is not ended, and the second TA valid duration ends, receive the first indication information sent by the UE, where the first indication information is used to notify the wireless access device of the second The TA effective duration has ended.

Further, the transmitting unit 102 is further configured to: when the first TA valid duration ends, and when the second TA valid duration ends, establish a connection with the UE by using random access on the first air interface format.

Further, the transmitting unit 102 is further configured to: send the second indication information to the UE, where the second indication information includes an index of the at least one candidate air interface format, where the candidate air interface format is any air interface format except the first air interface format.

In the case of employing an integrated unit, FIG. 12 shows a possible structural diagram of a UE (or a wireless access device) involved in the above embodiment. The UE (or wireless access device) includes a processing module 1302 and a communication module 1303. The processing module 1302 is configured to perform control management on the action of the UE. The communication module 1303 is configured to support communication between the UE and other network entities. The UE may further include a storage module 1301 for storing program codes and data of the UE (or the wireless access device).

The processing module 1302 may be a processor or a controller, for example, may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application specific integrated circuit (Application-Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 1303 may be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 1301 may be a memory.

When the processing module 1302 is a processor, the communication module 1303 is an RF transceiver circuit, and the storage module 1301 is a memory, the UE involved in the embodiment of the present invention may be the UE shown in FIG. 6.

When the processing module 1302 is a processor, the communication module 1303 is an RF transceiver circuit, and the storage module 1301 is a memory, the wireless access device according to the embodiment of the present invention may be the wireless access device shown in FIG.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it may occur in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. . Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

An uplink transmission method, comprising:

The user equipment UE determines the start time of the uplink transmission time unit for uplink transmission according to the used time advance TA amount;

Determining, by the UE, at least a first air interface format and a second air interface format, a target air interface format required to perform the uplink transmission, where a length of a symbol in the first air interface format is greater than a length of a symbol in the second air interface format The first TA effective duration of the TA amount in the first air interface format is greater than the second TA effective duration of the TA amount in the second air interface format;

When the start time of the uplink transmission time unit comes, if the TA effective duration corresponding to the target air interface format does not end, the UE performs the uplink transmission by using the target air interface format.
The method according to claim 1, wherein when the start time of the uplink transmission time unit comes, the method further includes:

If the TA effective duration corresponding to the target air interface format has ended, the UE cancels the uplink transmission.
The method according to claim 1 or 2, wherein the method further comprises:

When the first TA valid duration is not completed, and the second TA valid duration ends, the UE releases the configured uplink configuration resource in the second air interface format, where the uplink configuration resource includes a physical uplink. At least one of a control channel PUCCH resource, a transmission sounding reference signal SRS resource, a transmission hybrid automatic repeat request HARQ feedback resource, and a physical uplink shared channel PUSCH resource.
The method according to any one of claims 1 to 3, wherein the target air interface format is the second air interface format, and the TA effective duration corresponding to the target air interface format is the second TA effective duration ,

The method further includes: when the first TA valid duration is not ended, and the second TA valid duration is ended, the method further includes:

The first indication information is sent by the UE to the wireless access device by using the first air interface format, where the first indication information is used to notify the wireless access device that the validity period of the second TA has ended.
The method according to any one of claims 1 to 4, wherein the method further comprises:

When the first TA effective duration ends, and the second TA valid duration ends, the UE releases the configured uplink configuration resource in the first air interface format, where the uplink configuration resource includes a PUCCH resource and an SRS resource. At least one of a HARQ feedback resource and a PUSCH resource.
The method according to any one of claims 1 to 5, wherein when the first TA valid duration ends and the second TA valid duration ends, the method further includes:

The UE initiates a random access to the radio access device in a third air interface format, where the third air interface format is any one of the air interface format sets to which the logical channel LCH of the uplink data to be transmitted belongs.
The method of claim 6 wherein the method further comprises:

The UE determines one of the air interface format sets as the third air interface format according to the priority of the LCH in each air interface format in the air interface format set.
The method according to claim 6 or 7, wherein the method further comprises:

Receiving, by the UE, second indication information that is sent by the wireless access device, where the second indication information includes an index of at least one fourth air interface format, where the fourth air interface format is any other than the third air interface format. Air interface format;

The UE initiates random access to the wireless access device on the at least one fourth air interface format.
The method according to claim 8, wherein the UE initiates random access to the wireless access device in the at least one fourth air interface format, including:

The UE determines, from the at least one fourth air interface format, an air interface format that satisfies a random access condition, where the random access condition includes at least one air interface format supported by the UE and a bandwidth range supported by the UE. At least one;

The UE initiates random access to the wireless access device on an air interface format that satisfies the random access condition.
The method of any of claims 1-9, wherein the method further comprises:

When acquiring an instruction for updating the amount of TA used by the UE, the UE starts a first time advance timer TAT corresponding to the first air interface format, and a second corresponding to the second air interface format In the TAT, the time duration of the first TAT is the first TA effective duration, and the timing of the second TAT is the second TA effective duration.
The method according to any one of claims 1 to 10, wherein the method further comprises:

Receiving, by the UE, configuration information that is sent by the wireless access device, where the configuration information includes a correspondence between the first air interface format and the first TA effective duration, and the second air interface format and the The correspondence between the effective durations of the second TAs.
An uplink transmission method, comprising:

The wireless access device determines, for the user equipment UE, a first TA effective duration of the time advance TA amount in the first air interface format, and a second TA effective duration of the TA amount in the second air interface format, where the first The length of the symbol in the air interface format is greater than the length of the symbol in the second air interface format, and the first TA effective duration is greater than the second TA effective duration;

The wireless access device sends configuration information to the UE, where the configuration information carries a correspondence between the first air interface format and the first TA effective duration, and the second air interface format and the The correspondence between the effective durations of the second TAs.
The method according to claim 12, wherein when the first TA valid duration is not ended and the second TA valid duration ends, the method further includes:

The wireless access device receives the first indication information sent by the UE, where the first indication information is used to notify the wireless access device that the second TA effective duration has ended.
The method according to claim 12 or 13, wherein when the first TA valid duration ends and the second TA valid duration ends, the method further includes:

The wireless access device establishes a connection with the UE by using random access on the first air interface format.
The method of claim 14, wherein the method further comprises:

The wireless access device sends the second indication information to the UE, where the second indication information includes an index of at least one candidate air interface format, and the candidate air interface format is any air interface format except the first air interface format.
A user equipment (UE), comprising:

a determining unit, configured to: determine a start time of an uplink transmission time unit used for uplink transmission according to a used time advance TA amount; and determine, when the uplink transmission is performed, at least from the first air interface format and the second air interface format a target air interface format, where the length of the symbol in the first air interface format is greater than the length of the symbol in the second air interface format, and the first TA effective duration of the TA amount is greater than Determining the second TA effective duration of the TA amount in the second air interface format;

And an execution unit, configured to: when the start time of the uplink transmission time unit comes, if the TA effective duration corresponding to the target air interface format is not ended, performing the uplink transmission by using the target air interface format.
The UE of claim 16 wherein:

The execution unit is further configured to: when the start time of the uplink transmission time unit comes, if the TA effective duration corresponding to the target air interface format has ended, cancel the uplink transmission.
The UE according to claim 16 or 17, wherein

The execution unit is further configured to: when the first TA valid duration is not completed, and when the second TA valid duration ends, release the configured uplink configuration resource in the second air interface format, where the uplink configuration is performed. The resource includes at least one of a physical uplink control channel PUCCH resource, a transmission sounding reference signal SRS resource, a transmission hybrid automatic repeat request HARQ feedback resource, and a physical uplink shared channel PUSCH resource.
The UE according to any one of claims 16 to 18, wherein the target air interface format is the second air interface format, and the TA effective duration corresponding to the target air interface format is the second TA effective duration. The UE further includes:

a sending unit, configured to send, by using the first air interface format, first indication information to the wireless access device, when the first TA valid duration is not completed, and the second TA valid duration ends, where An indication message is used to notify the wireless access device that the second TA validity period has ended.
The UE according to any one of claims 16 to 19, characterized in that

The execution unit is further configured to: when the first TA valid duration ends, and when the second TA valid duration ends, release the configured uplink configuration resource in the first air interface format, where the uplink configuration resource is configured At least one of a PUCCH resource, an SRS resource, a HARQ feedback resource, and a PUSCH resource is included.
The UE according to any one of claims 16 to 20, wherein the UE further comprises:

a random access unit, configured to: when the first TA valid duration ends, and when the second TA valid duration ends, initiate random access to the wireless access device in a third air interface format, the third The air interface format is any one of the air interface format sets to which the logical channel LCH of the uplink data to be transmitted belongs.
The UE according to claim 21, characterized in that

The determining unit is further configured to: determine, according to a priority of the LCH in each air interface format in the air interface format set, one of the air interface format sets as the third air interface format.
The UE according to claim 21 or 22, wherein the UE further comprises an obtaining unit,

The acquiring unit is configured to receive the second indication information that is sent by the wireless access device, where the second indication information includes an index of at least one fourth air interface format, where the fourth air interface format is the third air interface Any air interface format outside the format;

The random access unit is further configured to: initiate random access to the wireless access device in the at least one fourth air interface format.
The UE according to claim 23, characterized in that

The determining unit is further configured to: determine, from the at least one fourth air interface format, an air interface format that satisfies a random access condition, where the random access condition includes at least one air interface format supported by the UE and the At least one of the bandwidth ranges supported by the UE;

The random access unit is specifically configured to: initiate random access to the wireless access device on an air interface format that satisfies the random access condition.
The UE according to any one of claims 16 to 24, wherein when an instruction for updating the amount of TA used by the UE is acquired,

The execution unit is further configured to: start a first time advance timer TAT corresponding to the first air interface format, and a second TAT corresponding to the second air interface format, where a time duration of the first TAT is The first TA is valid for a duration, and the timing of the second TAT is the second TA effective duration.
The UE according to any one of claims 16 to 25, characterized in that

The acquiring unit is further configured to: receive configuration information sent by the wireless access device, where the configuration information includes a correspondence between the first air interface format and the first TA effective duration, and the The correspondence between the two air interface format and the second TA effective duration.
A wireless access device, comprising:

a determining unit, configured to determine, for the user equipment UE, a first TA effective duration of the time advance TA amount in the first air interface format, and a second TA effective duration of the TA amount in the second air interface format, where the The length of the symbol in an air interface format is greater than the length of the symbol in the second air interface format, and the first TA effective duration is greater than the second TA effective duration;

a transmission unit, configured to send configuration information to the UE, where the configuration information carries a correspondence between the first air interface format and the first TA effective duration, and the second air interface format and the first The correspondence between the effective durations of the two TAs.
The wireless access device of claim 27, wherein

The transmitting unit is further configured to: when the first TA valid duration is not ended, and when the second TA valid duration ends, receive the first indication information sent by the UE, where the first indication information is used to notify The second TA effective duration of the wireless access device has ended.
A wireless access device according to claim 27 or 28, characterized in that

The transmitting unit is further configured to: when the first TA valid duration ends, and when the second TA valid duration ends, establish a connection with the UE by using random access on the first air interface format.
The wireless access device of claim 29, wherein

The transmitting unit is further configured to: send the second indication information to the UE, where the second indication information includes an index of at least one candidate air interface format, where the candidate air interface format is any other than the first air interface format. Air interface format.