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WO2018205567A1 - Procédé et dispositif d'accès à utiliser avec un canal de bande de fréquence sans licence - Google Patents

Procédé et dispositif d'accès à utiliser avec un canal de bande de fréquence sans licence Download PDF

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Publication number
WO2018205567A1
WO2018205567A1 PCT/CN2017/113913 CN2017113913W WO2018205567A1 WO 2018205567 A1 WO2018205567 A1 WO 2018205567A1 CN 2017113913 W CN2017113913 W CN 2017113913W WO 2018205567 A1 WO2018205567 A1 WO 2018205567A1
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WIPO (PCT)
Prior art keywords
channel
access
accessed
data transmission
unlicensed band
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Application number
PCT/CN2017/113913
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English (en)
Chinese (zh)
Inventor
王建中
Original Assignee
深圳市金立通信设备有限公司
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Publication of WO2018205567A1 publication Critical patent/WO2018205567A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0825—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision detection

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to an access method and apparatus for an unlicensed band channel.
  • Wireless spectrum resources are a reusable and irreplaceable natural resource in wireless communication technology, and play a vital role in the fields of mobile communication, broadcast television, aviation navigation, and space exploration.
  • the spectrum resources belong to national resources and are divided into licensed band resources and unlicensed band resources.
  • the licensed band resources need to be authorized by the state to be used.
  • the unlicensed band is open band and can be used without national license.
  • DFS Dynamic Frequency Selection
  • AP Access Point
  • RSSI Received Signal Strength Indicator
  • the 3rd Generation Partnership Project (3GPP) stipulates four channel access schemes for accessing the unlicensed band: no Listening After Listening (LBT) access, LBT access without back-off window, LBT access with fixed back-off window, and LBT access with back-off window adjustable.
  • the above channel access scheme may have the following problems: 1) If the channel is accessed in a non-LBT mode, when other devices or systems in the channel transmit data, interference may be caused to other devices or systems; 2) if LBT is used Access channel, after accessing the channel, the channel will be used until the next DFS period, which will cause some channels to be in a crowded state, some channels are idle, and channel resources are used unevenly; 3) use unlicensed bands The time of the channel is limited, and the time to access the channel again after the channel is used is uncertain, which easily causes the transmission delay.
  • the embodiment of the invention provides an access method and device for an unlicensed band channel, which can make channel resources of the unlicensed band get reasonable use.
  • a first aspect of the embodiments of the present invention provides a method for accessing an unlicensed band channel, including:
  • the second aspect of the embodiments of the present invention provides an access device for an unlicensed band channel, including:
  • a data transmission module configured to perform data transmission through an accessed channel of the unlicensed band
  • a channel listening module configured to listen to a channel state of a remaining channel of the unlicensed band
  • a channel determining module configured to determine a first channel from remaining channels of the unlicensed band according to the channel state
  • the first channel access module is configured to access the first channel for data transmission.
  • the access device of the unlicensed band channel provided by the second aspect of the present invention is used to perform the access method of the unlicensed band channel provided by the first aspect of the present invention.
  • the access device of the unlicensed band channel provided by the second aspect of the present invention is used to perform the access method of the unlicensed band channel provided by the first aspect of the present invention.
  • a third aspect of the embodiments of the present invention provides an access device for an unlicensed band channel, including a processor, a memory, and a communication interface, wherein the processor, the memory, and the communication interface are connected to each other, wherein the communication interface is used to receive and And transmitting, by the memory, an application code for storing an access device supporting an unlicensed band channel, the processor configured to perform the method of the first aspect above.
  • a fourth aspect of the embodiments of the present invention provides a computer storage medium storing a computer program, the computer program comprising program instructions, the program instructions, when executed by a processor, causing the processor to execute the above The method of the first aspect.
  • the channel state of the remaining other channels is also monitored, the first channel is selected from the remaining channels, and the first channel is accessed for data transmission.
  • the first letter in time Channels also avoid long-term access to a channel and interfere with the communication of other devices or systems on the channel.
  • FIG. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of accessing a channel of an unlicensed frequency band according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for accessing an unlicensed band channel according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for accessing a channel for accessing an unlicensed frequency band by using an LBT method according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of another method for accessing an unlicensed band channel according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of still another method for accessing an unlicensed band channel according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of channel access for detecting an idle channel and accessing an idle channel at different times according to an embodiment of the present invention
  • FIG. 8 is a schematic flowchart of still another method for accessing an unlicensed band channel according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an access device for an unlicensed band channel according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another access device for an unlicensed band channel according to an embodiment of the present invention.
  • FIG. 1 is a system architecture provided by an embodiment of the present invention.
  • a WIFI communication system a Bluetooth communication system, a Long Term Evolution (LTE) communication system, a Wideband Code Division Multiple Access (WCDMA) communication system, and a CDMA2000 (full name: Code Division Multiple Access 2000)
  • LTE Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA2000 full name: Code Division Multiple Access 2000
  • the communication system shares the channel resources of the unlicensed band to complete their respective independent communication. In a possible manner, a part of the channel of the unlicensed band is accessed by the communication device of the plurality of communication systems.
  • channel 1 in FIG. 1 is accessed by the WIFI system and the communication device of the LTE communication system, and the channel 1 is connected.
  • the schematic diagram can be as shown in FIG. 2, the communication device of the WIFI communication system and the communication device of the LTE communication system each occupy different time slots for data transmission; in another possible manner, in the case that the communication is not busy, Another portion of the licensed frequency band is only accessed by the communication device of one communication system.
  • channel 2 in Figure 1 is accessed by the communication device of the Bluetooth communication system, and channel 3 is accessed by the communication device of the WCDMA communication system.
  • the technical solution of the present invention is specifically applicable to an LTE communication system, a WCDMA communication system, a CDMA2000 communication system, etc., wherein the LTE communication system is a 4G communication system, a WCDMA communication system, and a CDMA2000 communication system is a 3G communication system, and all three communication systems have Its corresponding licensed band.
  • the LTE communication system is a 4G communication system
  • a WCDMA communication system and a CDMA2000 communication system is a 3G communication system
  • all three communication systems have Its corresponding licensed band.
  • the communication system in which the 4G communication system and the 3G communication system communicate using the licensed band can be deployed on the unlicensed band to ease the license.
  • the flow pressure of the frequency band As the frequency resources of the licensed band become increasingly tight, and the frequency resources of the unlicensed band are abundant, the communication system in which the 4G communication system and the 3G communication system communicate using the licensed band can be deployed on the unlicensed band to ease the license.
  • the technical solution of the present invention can also be applied to other communication systems that use the licensed band to communicate in a 5G communication system and a future communication system after the 5G system, and the specific implementation manner can refer to the LTE communication system that uses the licensed band to communicate or The specific implementation of the WCDMA communication system.
  • the implementation framework for deploying communication systems using licensed bands for communication on unlicensed bands has three main modes: the first mode is supplemental downlink (English: Supplement Downlink, SDL) mode, that is, the unlicensed band is only used for downlink data transmission, and the second mode is Carrier Aggregation (CA) mode, that is, the unlicensed band is used for uplink and uplink.
  • SDL Supplement Downlink
  • CA Carrier Aggregation
  • Road data transmission wherein, in the SDL mode and the CA mode, the channel of the unlicensed band is used only for data transmission, and the control command transmits the channel in the licensed band, so the technology of the SDL mode and the CA mode is also called the authorization auxiliary connection.
  • LAA Licensed-Assisted Access
  • SA Standalone
  • the technical solution of the present invention is also applicable to a communication system that always uses an unlicensed frequency band for communication, including, for example, a WIFI communication system, a Bluetooth communication system, and the like.
  • the full-duplex technology can be applied to the unlicensed frequency band.
  • the technical solution of the embodiment of the present invention can realize the detection of the data in the communication system adopting the full-duplex communication mode. Listening to the channel state of the remaining channels that are not currently accessed, determining the manner of accessing the idle channel according to the channel state and the listening time of the remaining channels, and ensuring continuity and reliability of the transmission.
  • FIG. 3 is a schematic flowchart of a method for accessing an unlicensed band channel according to an embodiment of the present invention.
  • an access method for an unlicensed band channel can be implemented in the system architecture corresponding to FIG.
  • the method as shown in the figure includes at least:
  • the accessed channel may include one or more channels of the unlicensed band, and if the accessed channel includes multiple unlicensed channels, the multiple unlicensed channels are simultaneously used in the CA mode. Data transfer.
  • the remaining channel refers to other channels in the unlicensed band that exclude the currently accessed channel.
  • the unlicensed band has a total of 4 channels, namely channel 1, channel 2, channel 3, and channel 4.
  • the remaining channels are channel 2 and channel 4, that is, Data transmission is performed through channel 1 and channel 2 while listening to the channel states of channel 2 and channel 4.
  • the channel state includes two states: an idle state and a non-idle state. If there is data transmission in the channel, the channel is in a non-idle state, and if there is no data transmission in the channel, the channel is empty. Idle state.
  • the channel state of the remaining channels of the unlicensed band may be monitored in at least three manners: 1) energy detection, determining a channel state of the remaining channel by detecting signal energy of the remaining channel, if the signal energy of the remaining channel is low The preset threshold is determined to be in an idle state; 2) carrier detection, determining a channel state of the remaining channel by detecting a signal characteristic in the remaining channel, detecting whether there is a scrambling code, a carrier frequency, etc. in the remaining channel, if If not, it is determined that the remaining channel is in an idle state; 3) energy carrier hybrid detection, which can combine the 1) and 2) modes, detect the signal strength and signal characteristics in the remaining channels, and comprehensively determine the channel state of the remaining channels.
  • data transmission may be performed on the accessed channel by using one or more antennas, wherein the data transmission includes receiving and transmitting data; and simultaneously listening to the remaining channels of the unlicensed band by using one antenna Channel status.
  • the antenna 1, antenna 2, and antenna 3 can be used for data transmission, and the antenna 2 is used to listen to the data.
  • the channel status of the remaining channels of the licensed band if there are currently four transmitting and receiving antennas, namely antenna 1, antenna 2, antenna 3, and antenna 4, the antenna 1, antenna 2, and antenna 3 can be used for data transmission, and the antenna 2 is used to listen to the data.
  • the channel status of the remaining channels of the licensed band if there are currently four transmitting and receiving antennas, namely antenna 1, antenna 2, antenna 3, and antenna 4, the antenna 1, antenna 2, and antenna 3 can be used for data transmission, and the antenna 2 is used to listen to the data.
  • the channel status of the remaining channels of the licensed band if there are currently four transmitting and receiving antennas, namely antenna 1, antenna 2, antenna 3, and antenna 4, the antenna 1, antenna 2, and antenna 3 can be used for data transmission, and the antenna 2 is used to listen to the data.
  • the channel status of the remaining channels of the licensed band if there are currently four transmitting and receiving antennas, namely antenna 1, antenna 2, antenna 3, and
  • the antenna may be allocated according to the amount of uplink data and the amount of downlink data. For example, if the amount of uplink data is greater than the amount of downlink data, more antennas are allocated for uplink transmission.
  • the first channel is a channel in an idle state.
  • whether the channel is in an idle state may be determined according to three manners of listening to the channel state of the remaining channel of the unlicensed band mentioned in step S102.
  • S104 Access the first channel for data transmission.
  • the first channel can be accessed by the following two forms:
  • the first channel can be accessed by using an LBT mode, where a specific flowchart for accessing a channel of the unlicensed band in an LBT manner is shown in FIG. 4, first, a channel in an unlicensed band. Send a smaller control packet, and then determine whether a transmission collision occurs by determining whether an acknowledgment message is received within a specified time. If an acknowledgment message is received within a specified time, indicating that no transmission conflict has occurred, it is determined that the transmission can be accessed. The channel performs data transmission; if an acknowledgment message is not received within the specified time, indicating that a transmission collision currently occurs, the retransmission is delayed according to a certain backoff algorithm.
  • the first channel becomes an accessed channel, and steps S101 to S104 may be performed cyclically until the data transmission is completed.
  • the specific process may be as shown in FIG. 5, and the unlicensed frequency band is adopted.
  • the idle channel described in step S4 of FIG. 5 corresponds to the first channel described in step S104 of FIG. 3, and the first channel is one of the idle channels that are detected during data transmission, and is accessed. After the first channel, the first channel becomes one of the accessed channels, and the access mode is the same as the access mode.
  • the form in which the channel performs data transmission is the same as the specific mode, and will not be described again.
  • the accessed channel includes multiple channels of the unlicensed band
  • the access duration of the target channel in each of the accessed channels reaches a third time threshold, releasing the Target channel.
  • the channel state of the remaining other channels is also monitored, and the first channel is selected from the remaining channels and the first channel is accessed. Data transmission is performed, and the channel state of the remaining channels is always monitored during the data transmission process.
  • the first channel in the idle state is detected, the first channel is accessed in the LBT mode for transmission, that is, while listening ( Listen And Talk (LAT) accesses the channel to ensure the continuity and reliability of data transmission. Accessing the first channel in time can also avoid long-term access to a certain channel and cause communication with other devices or systems on the channel. interference.
  • the first letter can be determined according to the service requirement of the user.
  • the channel performs the form of data transmission, that is, the form of accessing the first channel according to the service requirement of the user.
  • the first channel is accessed, and data is simultaneously transmitted through the accessed channel and the first channel in a carrier aggregation manner; Or if it is determined that the throughput required by the service of the user is less than the preset throughput, and the transmission delay corresponding to the service is greater than a preset delay threshold, releasing the accessed channel and switching access to the first channel Data transfer.
  • the data transmission is performed through the accessed channel and the first channel in a carrier aggregation manner to improve transmission efficiency; for example, the user is currently downloading a file with a small data through the user equipment, and the required information is needed at this time. If the throughput is small and there is no delay requirement, the first channel can be switched to perform data transmission.
  • the preset throughput and the preset delay threshold may be determined according to a transmission rate of a channel of the unlicensed band.
  • the form of accessing the first channel for data transmission may be determined according to the length of the listening time, where the listening time starts when accessing an idle channel for transmission, The time to hear the next idle channel ends.
  • S201 Perform data transmission through an accessed channel of the unlicensed band, and simultaneously listen to a channel state of the remaining channels of the unlicensed band.
  • step S201 can be referred to the description in steps S101 to S102 in the embodiment corresponding to FIG. 3, and details are not described herein again.
  • the listening time is the time starting point of the access time of the accessed channel with the latest access time in the accessed channel.
  • the access channels that have been accessed are channel A, channel B, and channel C, where the access time of channel A is 10:15:05, and the access time of channel B is 10:15: 06, channel The access time of C is 10:15:07, and 10:15:07 is used as the starting time of the listening time.
  • the first time threshold is a CA threshold
  • the first channel in an idle state is detected within a listening time less than the first time threshold
  • the first channel and the already The access channels are aggregated to simultaneously transmit data, that is, step S203 is performed. If the first channel in the idle state is not detected within the listening time less than the first time threshold, the listening is continued.
  • Access the first channel perform data transmission by using the accessed channel and the first channel in a carrier aggregation manner, and use a time of accessing the first channel as a time starting point of the listening time.
  • the first channel when accessing the first channel, the first channel becomes the accessed channel with the latest access time in the accessed channel, and the time of accessing the first channel is used as the time of the listening time.
  • the starting point continues to listen to the channel state of other channels except the currently accessed channel.
  • the second time threshold is a channel switching threshold
  • the third time threshold is a maximum duration of a single channel that can be used after accessing the channel of the unlicensed band, if the listening time is greater than the second time threshold.
  • the second time threshold may be the same as the first time threshold, that is, the CA threshold is the same as the channel switching threshold, that is, if the listening time is less than the first time threshold, step S203 is performed in the carrier aggregation mode. The access channel and the first channel are used at the same time. If the listening time is greater than the first time threshold, step S205 is performed to switch to access the first channel.
  • the second time threshold may be different from the first time threshold, that is, the CA threshold is different from the channel switching threshold, and if the time is greater than the first time threshold and less than the second time threshold, the detection time is detected.
  • the form of accessing the first channel may be determined according to the service requirement of the user, and the access to the first channel may be determined according to the service requirement of the user. The specific description of the form will not be repeated here.
  • the accessed channel includes multiple channels of the unlicensed band
  • the access duration of the target channel in each of the accessed channels reaches a third time threshold, releasing the Target channel.
  • Steps S201 to S206 will be specifically described below by way of example.
  • the first time threshold is 10s
  • the second time threshold is 15s
  • the third time threshold is 25s. If the channel 1 is accessed at 10:00:00, the time starting time of the listening time is set to 10. :00:00 starts timing; at 10:00:07, channel 2 is detected to be idle. At this time, the listening time is 7s, 7s ⁇ 10s, that is, listening within the listening time less than the first time threshold.
  • access channel 2 use channel 1 and channel 2 in carrier aggregation mode, and set the time start of the listening time to 10:00:07 to continue listening; when 10:00:15
  • the listening time is 8s, 8s ⁇ 10s, that is, when the idle channel is detected within the listening time less than the first time threshold, channel 1, channel 2, and channel 3 are used as carriers.
  • Aggregate mode is used, and the starting time of the listening time is set to 10:00:15 to continue listening; when the time reaches 10:00:25, the access duration of channel 1 reaches 25s, then channel 1 is released, Channel 2 and channel 3 continue to be used in carrier aggregation mode while continuing to listen.
  • 10:00:31 is heard
  • channel 4 is idle.
  • the listening time is 16s, 16s>15s, that is, when the idle channel is detected within the listening time greater than the second time threshold, then channel 2 and channel 3 are released, the access channel 4 is switched, and the listening time will be
  • the time starting point is set to 10:00:31 to continue listening.
  • 10:00:56 the idle channel except channel 4 is not heard, channel 4 is released, and the next access channel is awaited.
  • the channel state of the remaining other channels is also monitored, and the first channel is selected from the remaining channels, and determined according to the listening time. Accessing the first channel form, when the first channel in the idle state is detected in the listening time less than the first time threshold, the first channel is accessed by the carrier aggregation method for data transmission, and the data transmission is accelerated. When the first channel in the idle state is detected in the listening time greater than the second time threshold, the accessed channel is released, and the first channel is switched to avoid long-term access to a certain channel on the channel.
  • the communication of other devices or systems causes interference, and timely access to the first channel ensures continuity and reliability of data transmission.
  • FIG. 8 is a schematic flowchart of another method for accessing an unlicensed band channel according to an embodiment of the present invention, where the method includes:
  • whether the service requirement of the user is satisfied may be determined according to the transmission delay and the packet loss rate on the channel of the licensed frequency band in the past period of time;
  • the drop rate and congestion level on the channel of the licensed band determine whether the user's service requirements are met.
  • the transmission delay of the channel of the licensed frequency band is large or the packet loss rate is high in the past period of time, it is determined that the channel of the licensed frequency band cannot meet the service requirement of the user; for example, the licensed frequency band is used in the past period of time. If the drop rate is high or the channel congestion is high, it is determined that the channel of the licensed band cannot meet the user's service requirements.
  • the channel of the licensed band when it is detected that the channel of the licensed band always has a data transmission error in the past period of time, it is determined that the channel of the licensed band cannot satisfy the user's service requirement.
  • step S302 is performed; when the channel of the licensed frequency band satisfies the service requirement of the user, the data is directly transmitted on the channel of the licensed frequency band.
  • the load information of the unlicensed band can be determined by the average duty ratio of the channels of the unlicensed band detected over a period of time, wherein the smaller the average duty ratio, the lighter the load of the unlicensed band channel.
  • the channels of the unlicensed band have channel A, channel B and channel C respectively, and the average duty ratio of channel A is detected to be 30% in the same period of time, and the average duty ratio of channel B is 35%. With an average duty cycle of 50%, it is determined that the load of channel A is the lightest.
  • the second channel is determined to be idle by the energy detection, the carrier detection, or the energy carrier hybrid detection.
  • the energy detection the carrier detection, or the energy carrier hybrid detection.
  • step S305 is performed.
  • S305 Access the second channel in an LBT manner.
  • S306. Perform data transmission by using the second channel, and simultaneously listen to a channel state of a remaining channel of the unlicensed band.
  • the second channel after accessing the second channel, the second channel becomes an accessed channel, that is, the second channel corresponds to the accessed channel of step S101 in the embodiment corresponding to FIG. 1, and the remaining channel refers to the current channel.
  • Other channels of the unlicensed band that are not accessed.
  • S307. Determine, according to the channel state, whether a first channel in an idle state exists in a remaining channel of the unlicensed band.
  • step S102 the remaining channel state of the unlicensed band is described in step S102 in the embodiment corresponding to FIG. 3, and details are not described herein again.
  • step S308 is performed, otherwise, the channel state of the remaining channels of the unlicensed band is continuously monitored.
  • the downlink control message may be used to indicate that the user equipment accesses the first channel, and simultaneously performs data transmission by using the second channel and the first channel in a carrier aggregation manner; or for indicating The user equipment releases the second channel, and switches to access the first channel for data transmission.
  • the form of accessing the first channel for data transmission may be determined by a service requirement of the user, or may be determined by a listening time, and may also be determined by combining a service requirement of the user and a listening time.
  • the specific implementation logic has been introduced in the above method, and will not be described again.
  • S309 Access the first channel for data transmission, and perform data transmission by using the second channel and the first channel in a carrier aggregation manner.
  • the S307 to S310 may be cyclically executed according to the process steps corresponding to FIG. 5 until the data transmission is completed.
  • the accessed channel includes multiple channels of the unlicensed band
  • the access duration of the target channel in each of the accessed channels reaches a third time threshold, releasing the Target channel.
  • the second channel is accessed through the LBT, and the remaining channels are also intercepted while transmitting data through the second channel.
  • Channel state selecting the first channel from the remaining channels and accessing the first channel for data transmission, that is, accessing the channel in the manner of LAT, ensuring continuity and reliability of data transmission, and timely accessing the first channel can also be avoided Long-term access to a channel interferes with the communication of other devices or systems on the channel.
  • FIG. 9 is a schematic structural diagram of an access device for an unlicensed band channel according to an embodiment of the present invention. As shown in the figure, the device includes:
  • the data transmission module 410 is configured to perform data transmission by using an accessed channel of the unlicensed band
  • a channel listening module 420 configured to listen to a channel state of a remaining channel of the unlicensed band
  • a channel determining module 430 configured to determine a first channel from remaining channels of the unlicensed band according to the channel state
  • the first channel access module 440 is configured to access the first channel for data transmission.
  • the first channel access module 440 is specifically configured to:
  • the data transmission module 410 is specifically configured to:
  • the first channel access module 440 is specifically configured to:
  • the first channel is determined within a listening time that is less than the first time threshold, accessing the first channel, and simultaneously transmitting data through the accessed channel and the first channel in a carrier aggregation manner ;
  • the first channel is determined within a listening time that is greater than the second time threshold, releasing the access channel, and switching access to the first channel for data transmission, where the second time threshold is greater than or equal to the First time threshold.
  • the first channel access module 440 is specifically configured to:
  • the transmission delay corresponding to the service is greater than the preset delay threshold, releasing the accessed channel and switching access to the first channel data transmission.
  • the device further includes:
  • the load information intercepting module 450 is configured to listen to load information of all channels of the unlicensed band
  • a channel selection module 460 configured to select, according to the load information, a channel with the lightest load from all channels of the unlicensed band as a second channel;
  • the second channel access module 470 is configured to access the second channel.
  • the second channel access module 470 is specifically configured to:
  • the second channel is accessed if the second channel is in an idle state.
  • the device further includes:
  • the load evaluation module 480 is configured to determine whether the channel of the licensed frequency band meets a service requirement of the user;
  • the load information intercepting module 450 performs the step of listening to the load information of all channels of the unlicensed frequency band.
  • the channel determining module 430 is specifically configured to:
  • the device further includes:
  • the control message sending module 490 is configured to send a downlink control message to the user equipment by using a downlink control channel of the licensed frequency band, where the downlink control message is used to indicate that the user equipment accesses the first channel for data transmission.
  • the channel transmission module 410 is specifically configured to:
  • the device also includes:
  • An access time determining module 500 configured to separately determine an access duration of each accessed channel
  • the channel release module 510 is configured to release the target channel if an access duration of the target channel in each of the accessed channels reaches a third time threshold, where the third time threshold is greater than the second Time threshold.
  • each module may also correspond to the corresponding description of the method embodiment shown in FIG. 3, FIG. 5, FIG. 6, or FIG.
  • the unlicensed band channel access device performs data transmission through the accessed channel of the unlicensed band, and also listens to the channel state of the remaining other channels, from remaining Selecting the first channel in the channel and accessing the first channel for data transmission, that is, the LAT access channel ensures data continuity and reliability, and timely access to the first channel can also avoid long-term access to a certain channel. It interferes with the communication of other devices or systems on the channel.
  • FIG. 10 is an access device 60 for an unlicensed band channel according to an embodiment of the present invention.
  • the device includes a processor 61, a memory 62, and a communication interface 63.
  • the processor 61 is connected to the memory 62 and the communication interface 63, for example, the processor 61 can be connected to the memory 62 and the communication interface 63 via a bus.
  • the processor 61 is configured to support an access device of the unlicensed band channel to perform a corresponding function in the access method of the unlicensed band channel described in FIG. 3, FIG. 5, FIG. 6, or FIG.
  • the processor 61 can be a central processing unit (CPU), a network processor (in English: network processor, NP), a hardware chip, or any combination thereof.
  • the above hardware chip can It is an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), and a general array logic (GAL). Or any combination thereof.
  • the memory 62 is used to store program codes and the like.
  • the memory 62 may include a volatile memory (English: volatile memory), such as random access memory (English: random access memory, abbreviation: RAM); the memory 72 may also include non-volatile memory (English: non-volatile memory) For example, read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive , abbreviation: SSD); the memory 62 may also include a combination of the above types of memories.
  • ROM read-only memory
  • flash memory English: flash memory
  • HDD hard disk drive
  • SSD solid state drive
  • the communication interface 63 is for transmitting data.
  • the processor 61 can invoke the program code to perform the following operations:
  • the processor 61 accesses the first channel for data transmission, and specifically includes:
  • the processor 61 is specifically configured to perform data transmission by using an accessed channel of the at least one unlicensed band;
  • the processor 61 accesses the first channel for data transmission, and specifically includes:
  • the first channel is determined within a listening time that is less than the first time threshold, accessing the first channel, and simultaneously transmitting data through the accessed channel and the first channel in a carrier aggregation manner ;
  • the first channel is determined within a listening time greater than the second time threshold, releasing the connection And entering a channel, switching access to the first channel for data transmission, where the second time threshold is greater than or equal to the first time threshold.
  • the processor 61 accesses the first channel for data transmission, and specifically includes:
  • the transmission delay corresponding to the service is greater than the preset delay threshold, releasing the accessed channel and switching access to the first channel data transmission.
  • the method further includes:
  • the processor 61 accesses the second channel, and specifically includes:
  • the second channel is accessed if the second channel is in an idle state.
  • the processor 61 is further configured to:
  • the processor 61 determines the first channel from the remaining channels of the unlicensed frequency band according to the channel state, and specifically includes:
  • the method further includes:
  • the downlink control channel of the licensed frequency band is used to send a downlink control message to the user equipment, where the downlink control message is used to indicate that the user equipment accesses the first channel for data transmission.
  • the processor 61 performs data transmission through the accessed channel of the unlicensed band, and the specific package include:
  • the processor 61 is also used to:
  • each operation may also correspond to the corresponding description of the method embodiment shown in FIG. 3, FIG. 5, FIG. 6, or FIG.
  • An embodiment of the present invention further provides a computer storage medium storing a computer program, the computer program comprising program instructions, the program instructions, when executed by a processor, causing the processor to execute the foregoing embodiment Said method.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un procédé et un dispositif d'accès destinés à être utilisés avec un canal de bande de fréquence sans licence. Le procédé d'accès destiné à être utilisé avec un canal de bande de fréquence sans licence comprend les étapes suivantes : exécution d'une transmission de données au moyen d'un canal d'une bande de fréquence sans licence auquel on a accédé ; interception d'un état de canal des canaux restants de la bande de fréquence sans licence ; détermination d'un premier canal parmi les canaux restants de la bande de fréquence sans licence en fonction de l'état de canal ; accès au premier canal pour transmettre les données. La solution technique utilisée dans le mode de réalisation de la présente invention peut empêcher sur un canal une interférence avec d'autres dispositifs ou systèmes produite lors d'un accès à un canal de la bande de fréquence sans licence, et permet de commuter rapidement d'autres canaux actifs et d'y accéder pour la transmission, ce qui réduit le retard de transmission tandis que les ressources de canal de la bande de fréquence sans licence sont utilisées raisonnablement.
PCT/CN2017/113913 2017-05-11 2017-11-30 Procédé et dispositif d'accès à utiliser avec un canal de bande de fréquence sans licence WO2018205567A1 (fr)

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CN112312329B (zh) * 2019-08-01 2022-07-26 合肥炬芯智能科技有限公司 基于蓝牙广播的通信方法、系统及其主设备、从设备
CN111465106B (zh) * 2020-03-02 2023-11-14 浙江华云信息科技有限公司 一种用于智能电网的免授权频段通信方法
CN111465116A (zh) * 2020-03-02 2020-07-28 浙江华云信息科技有限公司 一种用于智能电网的免授权频段信道接入方法及装置
CN115039438B (zh) * 2020-05-15 2025-01-28 Oppo广东移动通信有限公司 一种发送数据包的方法及压缩设备
CN114071739A (zh) * 2020-08-06 2022-02-18 维沃移动通信有限公司 免授权频谱的信道接入方法、终端及网络侧设备
CN113194539A (zh) * 2021-04-07 2021-07-30 深圳市乙辰科技股份有限公司 频段干扰抑制方法及系统
CN117835350A (zh) * 2024-03-01 2024-04-05 武汉昊一源科技有限公司 信道切换方法、设备、计算机程序产品及存储介质

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