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WO2021062874A1 - Procédé de détermination d'une taille de fenêtre de contention, dispositif réseau et équipement terminal - Google Patents

Procédé de détermination d'une taille de fenêtre de contention, dispositif réseau et équipement terminal Download PDF

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Publication number
WO2021062874A1
WO2021062874A1 PCT/CN2019/109820 CN2019109820W WO2021062874A1 WO 2021062874 A1 WO2021062874 A1 WO 2021062874A1 CN 2019109820 W CN2019109820 W CN 2019109820W WO 2021062874 A1 WO2021062874 A1 WO 2021062874A1
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WIPO (PCT)
Prior art keywords
network device
cws
uci
time unit
reference time
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PCT/CN2019/109820
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English (en)
Chinese (zh)
Inventor
吴作敏
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201980099240.2A priority Critical patent/CN114208080B/zh
Priority to PCT/CN2019/109820 priority patent/WO2021062874A1/fr
Publication of WO2021062874A1 publication Critical patent/WO2021062874A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • This application relates to the field of communication technology, in particular to a method for determining the size of a competition window, network equipment, and terminal equipment.
  • Unlicensed spectrum is a spectrum that can be used for radio equipment communications divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, communication devices in different communication systems as long as they meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, it is not necessary to apply for a proprietary spectrum authorization from the government.
  • LBT Listen Before Talk
  • the communication device performs channel detection on the unlicensed carrier according to the contention window size (Contention Window Size, CWS).
  • the current competition window size is determined based on the Long Term Evolution-Licensed-Assisted Access (LTE-LAA) system.
  • LTE-LAA Long Term Evolution-Licensed-Assisted Access
  • the NR system on the unlicensed frequency band supports more flexibility than the LTE-LAA system.
  • HARQ Hybrid Automatic Repeat
  • the embodiment of this application provides a method for determining the size of the contention window.
  • Network equipment and terminal equipment can be used to determine or adjust the CWS in the channel access scheme on the unlicensed carrier, so as to realize the difference between the systems on the unlicensed spectrum.
  • an embodiment of the present application provides a method for determining CWS, including:
  • the CWS on the unlicensed carrier is determined according to the reference time unit, where the CWS is used to perform channel detection on the unlicensed carrier.
  • an embodiment of the present invention provides a network device, the network device includes a processing unit configured to determine a reference time unit on an unlicensed carrier, and the reference time unit is used to transmit a physical uplink channel; The processing unit is further configured to determine the CWS on the unlicensed carrier according to the reference time unit, and the CWS is used to perform channel detection on the unlicensed carrier.
  • embodiments of the present application provide a terminal device, which has a function of implementing the behavior of the terminal device in the above method design.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the terminal device includes a processor, and the processor is configured to support the terminal device to perform the corresponding function in the foregoing method.
  • the terminal device may also include a communication interface, and the communication interface is used to support communication between the terminal device and the network device.
  • the terminal device may further include a memory, which is configured to be coupled with the processor and stores necessary program instructions and data of the terminal device.
  • an embodiment of the present invention provides a network device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by The processor executes, and the program includes instructions for executing steps in any method applied to a network device in the first aspect of the embodiments of the present invention.
  • an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the implementation of the present invention For example, part or all of the steps described in any method applied to a network device in the first aspect.
  • embodiments of the present invention provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute Part or all of the steps described in any method applied to a network device in the first aspect of the embodiments of the invention.
  • the computer program product may be a software installation package.
  • an embodiment of the present application provides a terminal device, including a processor, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be processed by the processor.
  • the program includes instructions for executing steps in any method applied to a terminal device in the first aspect of the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the For example, part or all of the steps described in any method applied to a terminal device in the first aspect.
  • embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute Part or all of the steps described in any method applied to a terminal device in the first aspect of the application embodiments.
  • the computer program product may be a software installation package.
  • the network device or the terminal device determines the reference time unit on the unlicensed carrier, the reference time unit is used to transmit the physical uplink channel, and the channel access scheme on the unlicensed carrier is determined according to the reference time unit
  • the CWS is used to perform channel detection on the unlicensed carrier to achieve friendly coexistence between systems on the unlicensed spectrum.
  • Fig. 1 is a schematic structural diagram of a possible communication system disclosed in an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a method for determining CWS disclosed in an embodiment of the present application
  • FIG. 3 is a schematic diagram of a CWS adjustment method on the network device side disclosed in an embodiment of the present application
  • FIG. 4 is a schematic diagram of a CWS adjustment method on the terminal device side disclosed in an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a network device disclosed in an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of another network device disclosed in an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of another terminal device disclosed in an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced long term evolution
  • NR New Radio
  • NR Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX Wireless Local Area Networks
  • WLAN Wireless Fidelity
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN wireless local area networks
  • IoT Internet of Things
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio telephone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be called communication devices.
  • the communication device may include a network device 110 having a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiment of the present application.
  • the method in the embodiments of the present application can be applied to unlicensed spectrum communication, and can also be applied to other communication scenarios, such as a licensed spectrum communication scenario.
  • Unlicensed spectrum is the spectrum that can be used for radio equipment communication divided by the country and region. This spectrum can be considered as a shared spectrum, that is, communication devices in different communication systems can meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, it is not necessary to apply for a proprietary spectrum authorization from the government.
  • LBT Listen Before Talk
  • communication devices can follow the principle of Listen Before Talk (LBT) when communicating on unlicensed spectrum, that is, Before the communication device transmits signals on the channels of the unlicensed spectrum, it needs to perform channel detection (or called channel detection) first.
  • LBT Listen Before Talk
  • the communication device can transmit signals; if the communication device is in The result of channel sensing on the unlicensed spectrum is that the channel is busy, and signal transmission cannot be performed.
  • the bandwidth of the LBT is 20 MHz, or an integer multiple of 20 MHz.
  • the communication device may adopt a corresponding channel access scheme to perform LBT operation.
  • a corresponding channel access scheme to perform LBT operation.
  • several channel access schemes are introduced below.
  • Type 1 (Cat-1LBT): Transmit immediately after the switching gap ends, that is, there is no need to detect whether the channel is idle. This type 1 channel access scheme is suitable for transmission switching within a COT.
  • the switching gap may not exceed a specific period of time, for example, 16 ⁇ s.
  • Cat-2LBT Type 2 (Cat-2LBT): It can be called LBT without random back-off. Signal transmission can be performed when the channel is idle within a single detection time, and signal transmission cannot be performed when the channel is occupied.
  • Type 3 LBT with random fallback based on a fixed contention window size (Contention Window Size, CWS).
  • CWS Contention Window Size
  • the communication device determines that CWS is CWp, where CWp is a fixed value, and the communication device takes the value according to CWp A random number N is generated, and the communication device performs channel detection on the unlicensed spectrum, and can perform signal transmission after the channel detection succeeds in all N time slots.
  • Type 4 LBT based on random fallback of variable CWS.
  • the communication device determines that CWS is CWp and CWp is a variable value.
  • the communication device generates a random number N according to the value of CWp.
  • Channel detection is performed on the licensed spectrum, and signal transmission can be performed after the channel detection is successful in N time slots.
  • N init N init , where N init is a random number uniformly distributed between 0 and CWp;
  • CCA time slot detection if the CCA time slot detection is successful, decrement the above counter by 1; otherwise, continue channel detection until the detection is successful;
  • the channel detection process ends, and the communication device can transmit downlink signals such as a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) or a physical downlink control channel (Physical Downlink Control Channel, PDCCH).
  • PDSCH Physical Downlink Shared Channel
  • PDCCH Physical Downlink Control Channel
  • the contention window size CWS is a value of a certain size used for channel detection of unlicensed channels, and the number of time slots for channel idle detection of unlicensed channels can be determined according to this value.
  • Cat-3LBT and Cat-4LBT lies in whether the CWS is a fixed value or a variable value.
  • More preferred channel access solutions can be Cat-1LBT, Cat-2LBT and Cat-4LBT.
  • Cat-3LBT and Cat-4LBT can further distinguish the priority of the channel access scheme according to the priority of the transmission service.
  • Cat-3LBT and Cat-4LBT may have different channel access sub-schemes, and different channel access sub-schemes may correspond to different service transmission priorities.
  • Table 1 shows the channel access parameters under different priorities during uplink channel access.
  • the corresponding channel access priority is 1 (ie Cat-4 Highest priority).
  • the backoff parameter in the channel access sub-scheme is 2, the minimum CWS is 7, the maximum CWS is 15, and the maximum channel occupancy time is 4 ms, the corresponding channel access priority is 2.
  • the backoff parameter in the channel access sub-solution is 3, the minimum CWS is 15, the maximum CWS is 1023, and the maximum channel occupancy time is 6ms or 10ms, the corresponding channel access priority is 3.
  • the backoff parameter in the channel access sub-scheme is 7, the minimum CWS is 15, the maximum CWS is 1023, and the maximum channel occupancy time is 6ms or 10ms, the corresponding channel access priority is 4.
  • the channel access parameters under different priorities during downlink channel access can be as shown in Table 2.
  • the embodiments of the present application are mainly applied to the determination or adjustment of the CWS in the channel access process performed according to the type 4 channel access scheme.
  • CWS Refers to the length of the contention window, which can be used for channel detection of unlicensed carriers.
  • MCOT Maximum Channel Occupancy Time
  • Channel Occupancy Time refers to the length of time for signal transmission using unlicensed spectrum channels after successful LBT.
  • the signal occupancy channel may be discontinuous during this length of time.
  • one COT is less than or equal to 20ms, and , The length of time occupied by signal transmission in the COT is less than or equal to MCOT.
  • Network equipment channel occupation time also known as COT initiated by the network equipment or channel occupation initiated by the network equipment, refers to a channel occupation time obtained after the successful LBT of the network equipment.
  • the channel occupation time of the network equipment can be used for downlink transmission, and can also be used for terminal equipment to perform uplink transmission under certain conditions.
  • Terminal equipment channel occupation time also called COT initiated by the terminal equipment or channel occupation initiated by the terminal equipment, which refers to a channel occupation time obtained by the terminal equipment after successful LBT.
  • Downlink transmission opportunity A group of downlink transmissions (that is, including one or more downlink transmissions) performed by a network device, the group of downlink transmissions is continuous transmission (that is, there is no gap between multiple downlink transmissions), or the group of downlink transmissions There is a gap in the transmission but the gap is less than or equal to a preset value such as 16 ⁇ s. If the gap between two downlink transmissions performed by the network device is greater than a preset value, for example, 16 ⁇ s, then the two downlink transmissions are considered to belong to two downlink transmission opportunities.
  • Uplink transmission opportunity A group of uplink transmissions performed by a terminal device (that is, including one or more uplink transmissions), the group of uplink transmissions is continuous transmission (that is, there is no gap between multiple uplink transmissions), or the group There is a gap in the uplink transmission but the gap is less than or equal to a preset value such as 16 ⁇ s. If the gap between two uplink transmissions performed by the UE is greater than a preset value such as 16 ⁇ s, then the two uplink transmissions are considered to belong to two uplink transmission opportunities.
  • FIG. 2 is a schematic flowchart of a method for determining CWS according to an embodiment of the present invention, and the method includes some or all of the following contents:
  • S201 Determine a reference time unit on an unlicensed carrier, where the reference time unit is used to transmit a physical uplink channel.
  • the time unit may include subframes, time slots, or mini time slots.
  • the time length of one subframe is 1 millisecond (ms), and one slot includes 14 symbols.
  • the mini-slot includes an integer number of symbols, such as 2, 4, or 7 symbols.
  • the reference time unit may include one or more time units.
  • the reference time unit may include part or all of the time units in a transmission opportunity.
  • the physical uplink channel includes a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH).
  • the PUSCH may not include the uplink shared channel (Uplink Shared Channel(s), UL-SCH) but only includes the uplink control information (Uplink Control Information, UCI) such as UCI only on PUSCH, or the PUSCH may also Can include UL-SCH.
  • UCI Uplink Control Information
  • the PUSCH is transmitted based on a code block group (CBG).
  • CBG code block group
  • S202 Determine the CWS on the unlicensed carrier according to the reference time unit.
  • the CWS can be determined according to the physical uplink channel transmitted on the reference time unit.
  • the method of determining or adjusting the CWS is also different.
  • the determining the CWS on the unlicensed carrier according to the reference time unit includes: determining the CWS on the unlicensed carrier according to the reference time unit and the first channel access priority.
  • the first channel access priority is CWS for channel detection.
  • the first channel access priority includes at least one of the channel access priorities in Table 1 (for example, when a terminal device performs channel access) or Table 2 (for example, when a network device performs channel access).
  • the first channel access priority can be represented by p.
  • the CWS in the channel access scheme on the unlicensed carrier is determined according to the reference time unit, where the reference time unit is used to transmit the physical uplink channel, and the CWS is used to perform channel detection on the unlicensed carrier. Realize the friendly coexistence between systems on the unlicensed spectrum.
  • the method for determining CWS proposed in the embodiment of the present invention can be applied to a network device, and the method includes at least part of the following content.
  • the reference time unit includes a time unit in the channel occupancy time initiated by the network device, and the network device does not transmit terminal device-specific physical information in the first transmission opportunity in the channel occupancy time.
  • Downlink shared channel Physical Downlink Shared Channel, PDSCH.
  • Figure 3 shows a schematic diagram of applying an embodiment of the present application to determine the CWS on the network device side.
  • the network device uses the resources in the downlink transmission opportunity to send the uplink authorization of the terminal device, and uses the uplink authorization to schedule the physical Uplink channel transmission, for example, scheduling terminal equipment to perform PUSCH or PUCCH transmission.
  • the downlink shared channel (Downlink Shared Channel (s), DL-SCH) of the terminal device is not included. Therefore, in the next CWS adjustment of the network device, the CWS can be determined or adjusted according to the reception of the PUSCH or PUCCH on part or all of the time units within the channel occupation time of this time.
  • s Downlink Shared Channel
  • the physical uplink channel carries the UCI and does not carry the UL-SCH, where the UCI includes HARQ information, the first part of channel state information CSI Part 1, and the first part of the channel state information. At least one of the two parts of channel state information CSI Part 2.
  • the HARQ information includes Hybrid Automatic Repeat-reQuest Acknowledgement (HARQ-ACK) information corresponding to the PDSCH received by the terminal device, and the HARQ-ACK information includes Acknowledgement (ACK) or negative response. (Negative Acknowledgement, NACK).
  • HARQ-ACK Hybrid Automatic Repeat-reQuest Acknowledgement
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • the CSI Part 1 or CSI Part 2 reflects the downlink channel quality status of the terminal device.
  • the physical uplink channel includes PUCCH.
  • the physical uplink channel includes PUSCH, and the PUSCH does not include UL-SCH but only UCI, that is, the PUSCH is UCI only on PUSCH.
  • the reference time unit is used to transmit the UCI.
  • the uplink information transmitted on the reference time unit includes UCI such as HARQ-ACK information, CSI Part 1 or CSI Part 2, it can be considered that the network device expects to receive the UCI information on the reference time unit and cannot be considered as a terminal.
  • the device must have sent the UCI information on the reference time unit.
  • the network device sends a PDCCH, and through the PDCCH triggers the terminal device to perform HARQ feedback or CSI report through the uplink resource on the reference time unit, such as PUCCH resource or PUSCH resource, and the terminal device receives the PDCCH before the reference time unit.
  • the terminal device does not perform HARQ feedback or CSI reporting on the uplink resource. Since the network device sends the PDCCH, no matter whether the terminal device transmits the UCI information on the uplink resource, the network device will perform the detection of the UCI information on the uplink resource.
  • the determining the CWS on the unlicensed carrier according to the reference time unit includes: determining according to a cyclic redundancy check (CRC) corresponding to at least one UCI included in the UCI The CWS.
  • CRC cyclic redundancy check
  • the network device can perform a CRC check on the UCI information expected to be received on the receiving side, and check it according to the CRC.
  • CWS can be determined or adjusted based on the results of the test.
  • the network device performs a reduction operation to determine the CWS; or, if the CRC corresponding to all UCIs in the UCI is checked The network device determines that the verification fails, and the network device performs an adding operation to determine the CWS.
  • the network device performs a reduction operation to determine the CWS; or, if the CRC corresponding to the at least one UCI is checked The network device determines that the verification fails, and the network device performs an adding operation to determine the CWS.
  • the network device performs a reduction operation to determine the CWS. For example, suppose that the network device expects to receive P UCIs in the reference time unit. Among the P UCIs, the number of UCIs that have succeeded in the CRC check of the network device is Q. Then when Q is greater than or equal to the preset value, or when Q/ When P is greater than or equal to a preset ratio, the network device performs a reduction operation to determine the CWS.
  • the network device performs an increase operation to determine the CWS. For example, suppose that the network device expects to receive P UCIs on the reference time unit. Among the P UCIs, the number of UCIs that failed the CRC check of the network device is R, then when R is greater than or equal to the preset value, or when R/ When P is greater than or equal to a preset ratio, the network device performs an increase operation to determine the CWS.
  • the physical uplink channel carries the UL-SCH, where the UL-SCH includes transmission based on a code block group CBG, and the determination is made according to the reference time unit on the unlicensed carrier
  • the CWS includes at least one of the following:
  • the TB successfully received by the network device is determined according to the CBG successfully received by the network device.
  • the network device can determine the CWS according to the CBG decoding result, or the network device can also convert the CBG decoding result into the TB decoding result. And according to the decoding result of TB, the CWS is determined.
  • the network device may convert the CBG decoding result into the TB decoding result, which may include at least one of the following methods:
  • the decoding result of the TB is considered correct, otherwise, the decoding result of the TB is considered wrong;
  • the decoding result of the TB is considered correct, otherwise, the decoding result of the TB is considered incorrect;
  • the decoding result of the TB is considered correct; otherwise, the decoding result of the TB is considered incorrect;
  • the decoding result of the TB is considered correct; otherwise, the decoding result of the TB is considered incorrect, where N is a positive integer.
  • the third threshold is 80%.
  • the TB successfully received by the network device is determined according to the CBG successfully received by the network device, including one of the following situations:
  • All CBGs included in the TB are successfully received by the network device, and the TB is considered to be successfully received by the network device;
  • the proportion of the CBG included in the TB that is successfully received by the network device is greater than or equal to a third threshold, and the TB is considered to be successfully received by the network device;
  • the first N consecutive CBGs included in the TB are successfully received by the network device, and the TB is considered to be successfully received by the network device, where N is a positive integer.
  • the method for determining CWS proposed in the embodiment of the present invention can be applied to a terminal device, and the method includes at least part of the following content.
  • the reference time unit includes a time unit in the channel occupation time initiated by the terminal device, and the channel access scheme corresponding to the reference time unit is a type 4 channel access scheme.
  • the reference time unit includes part or all of the time units in the channel occupation time initiated by the terminal device.
  • Figure 4 shows a schematic diagram of applying an embodiment of the present application to determine the CWS on the terminal device side.
  • the terminal device performs physical uplink channel transmission, for example, the terminal device performs PUSCH or PUCCH transmission.
  • the transmission of the uplink shared channel UL-SCH of the terminal equipment is not included. Therefore, in the next CWS adjustment of the terminal device, the CWS can be determined or adjusted according to the reception of the PUSCH or PUCCH in part or all of the time units during the channel occupation time.
  • the physical uplink channel carries the UCI and does not carry the UL-SCH, where the UCI includes HARQ information, the first part of channel state information CSI Part 1, and the first part of the channel state information. At least one of the two parts of channel state information CSI Part 2.
  • the HARQ information includes Hybrid Automatic Repeat-reQuest Acknowledgement (HARQ-ACK) information corresponding to the PDSCH received by the terminal device, and the HARQ-ACK information includes Acknowledgement (ACK) or negative response. (Negative Acknowledgement, NACK).
  • HARQ-ACK Hybrid Automatic Repeat-reQuest Acknowledgement
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • the CSI Part 1 or CSI Part 2 reflects the downlink channel quality status of the terminal device.
  • the physical uplink channel includes PUCCH.
  • the physical uplink channel includes PUSCH, and the PUSCH does not include UL-SCH but only UCI, that is, the PUSCH is UCI only on PUSCH.
  • the reference time unit is used to transmit the UCI.
  • the reference time unit is used to transmit the UCI
  • the determining the CWS on the unlicensed carrier according to the reference time unit includes: detecting corresponding to at least one UCI included in the UCI As a result, the CWS was confirmed.
  • the terminal device when the terminal device receives the downlink information of the network device, such as PDCCH or PDSCH or downlink feedback information (Downlink Feedback Information, DFI), if the terminal device receives the downlink information at the same time as the reference time unit The length of time between the moments when the UCI is sent meets the processing delay of the UCI sent on the reference time unit by the network device, and the downlink information includes the indication information of the detection result of the UCI by the network device, then the terminal device The CWS is determined according to the downlink information.
  • the downlink information of the network device such as PDCCH or PDSCH or downlink feedback information (Downlink Feedback Information, DFI)
  • DFI Downlink Feedback Information
  • the terminal device determining the CWS according to a detection result corresponding to at least one UCI included in the UCI includes: determining the CWS according to downlink feedback information, wherein the downlink feedback information includes the At least one detection result corresponding to UCI, and the downlink feedback information is sent by the network device.
  • the terminal device can receive the DFI sent by the network device, where the DFI includes the HARQ feedback information corresponding to all the uplink HARQ processes of the terminal device. If the terminal device transmits UCI through the PUSCH, but the UL-SCH is not included in the PUSCH, normally, the network device does not need to feed back the feedback information corresponding to the HARQ process of the PUSCH. In order to enable the terminal device to obtain information for CWS adjustment in this case, the network device can use the feedback information corresponding to the HARQ process to indicate the UCI detection result of the HARQ process by the network device.
  • the physical uplink channel includes a first physical uplink shared channel PUSCH, the first PUSCH corresponds to a first hybrid automatic retransmission HARQ process, and the downlink feedback information includes the at least one detection corresponding to UCI
  • the results include:
  • the feedback information corresponding to the first HARQ process in the downlink feedback information includes a detection result corresponding to the at least one UCI.
  • the feedback information corresponding to the first HARQ process includes the detection result corresponding to the at least one UCI, including at least one of the following situations:
  • the first HARQ process corresponds to ACK; or, if the CRC corresponding to all UCIs in the UCI is determined by the network device to fail the verification , The first HARQ process corresponds to NACK;
  • the first HARQ process corresponds to ACK; or, if the CRC corresponding to the at least one UCI is determined by the network device to fail the check , The first HARQ process corresponds to NACK;
  • the first HARQ process corresponds to ACK. For example, suppose that the network device expects to receive P UCIs in the reference time unit. Among the P UCIs, the number of UCIs that have succeeded in the CRC check of the network device is Q. Then when Q is greater than or equal to the preset value, or when Q/ When P is greater than or equal to the preset ratio, the first HARQ process corresponds to ACK;
  • the first HARQ process corresponds to NACK. For example, suppose that the network device expects to receive P UCIs in the reference time unit. Among the P UCIs, the number of UCIs that failed the CRC check of the network device is R, then when R is greater than or equal to the preset value, or when R/ When P is greater than or equal to the preset ratio, the first HARQ process corresponds to NACK.
  • the feedback information corresponding to the first HARQ process is NACK, it does not mean that the first HARQ process should be retransmitted the next time it is used for UL-SCH transmission.
  • the terminal device can perform a reduction operation to determine the CWS; or, if the terminal device receives the first HARQ process in the downlink feedback information, A NACK corresponding to a HARQ process can be added to determine the CWS.
  • performing a reduction operation to determine the CWS includes at least one of the following situations:
  • the CWS is an initial value, and the initial value is as shown in Table 2 above. Different channel access priorities correspond to different value ranges of CWS, and the initial value is the minimum value in the value range of CWS;
  • the second CWS is the initial value, that is, the minimum value in the value range of the CWS under the corresponding priority
  • the second CWS is the first CWS.
  • the first CWS if the second CWS is not the minimum value in the CWS value range under the corresponding priority, the second CWS can be reduced to the initial value or the minimum value of the CWS corresponding to the corresponding priority in Table 2.
  • the value is the first CWS, or it can be reduced from the second CWS to the next smaller number in the CWS range corresponding to the priority in Table 2 as the first CWS, or it can be a comparison to the second CWS
  • the first CWS is determined by exponential reduction, for example, it is reduced by a power of 2, or the first CWS may be determined in a linear reduction manner for the second CWS, etc., which is not limited here.
  • performing an adding operation to determine the CWS includes at least one of the following situations:
  • the CWS was the first CWS
  • the next larger number in the CWS range increased to the corresponding priority based on the second CWS was the first CWS, or it could be Increase in accordance with the exponential, for example, increase in the power of 2, or can also increase linearly, which is not limited here, where, if the second CWS is the maximum value in the CWS range under the corresponding priority, the increase operation is Keep the second CWS unchanged and determine it as the first CWS, but when the maximum value is maintained for K times, reset the first CWS to the initial value.
  • K is the number determined by the network device according to the channel access priority. , The value of K ranges from 1 to 8, for example.
  • performing a reduction operation to determine the CWS includes at least one of the following situations:
  • the second CWS is the initial value, that is, the minimum value in the value range of the CWS under the corresponding priority
  • the second CWS is the first CWS.
  • the first CWS if the second CWS is not the minimum value in the CWS value range under the corresponding priority, the second CWS can be reduced to the initial value or the minimum value of the CWS corresponding to the priority in Table 1.
  • the value is the first CWS, or it can be reduced from the second CWS to the next smaller number in the CWS range corresponding to the priority in Table 1 as the first CWS, or it can be a comparison to the second CWS
  • the first CWS is determined by exponential reduction, for example, it is reduced by a power of 2, or the first CWS may be determined in a linear reduction manner for the second CWS, etc., which is not limited here.
  • performing an adding operation to determine the CWS includes at least one of the following situations:
  • the CWS was the first CWS
  • the next larger number in the corresponding CWS range was increased on the basis of the second CWS to be the first CWS, or it could be an exponential increase For example, it increases by a power of 2, or it can also increase linearly, which is not limited here.
  • the second CWS is the maximum value in the CWS range under the corresponding priority
  • the second CWS should be increased.
  • K is a number determined by the terminal device according to the channel access priority, The value of K ranges from 1 to 8, for example.
  • the embodiments of the present application can be used to determine or adjust the CWS in the channel access scheme on the unlicensed carrier, so as to realize the friendly coexistence between the systems on the unlicensed spectrum.
  • the terminal equipment and the network equipment include hardware structures and/or software modules corresponding to the respective functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the terminal device into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated unit can be realized in the form of hardware or software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 5 is a schematic structural diagram of a network device disclosed in an embodiment of the present application.
  • the network device 500 includes: a first storage unit 501, a first processing unit 502, and a first communication unit 503.
  • the first storage unit 501 is used to store the program code and data of the terminal device.
  • the first communication unit 503 is used to support communication between the terminal device and other devices, for example, communication with a network device.
  • the storage unit 501 may be a memory
  • the first processing unit 502 may be a processor or a controller
  • the first communication unit 503 may be a transceiver, a transceiver circuit, a radio frequency chip, or the like.
  • the first processing unit 502 is configured to determine a reference time unit on an unlicensed carrier, the reference time unit is used to transmit a physical uplink channel; the CWS on the unlicensed carrier is determined according to the reference time unit, and the CWS is It is used to perform channel detection on the unlicensed carrier.
  • the physical uplink channel carries at least one of uplink control information UCI and uplink shared channel UL-SCH.
  • the physical uplink channel carries the UCI and does not carry the UL-SCH, where the UCI includes hybrid automatic retransmission request response HARQ information, the first part of channel state information CSI Part 1 and the second part of the channel At least one of the status information CSI Part 2.
  • the reference time unit is used for transmitting the UCI
  • the first processing unit is used for determining the CWS on the unlicensed carrier according to the reference time unit, including: the first processing unit is used for The CWS is determined according to a cyclic redundancy check CRC corresponding to at least one UCI included in the UCI.
  • the first processing unit is configured to: perform a reduction operation to determine the CWS; or, if the UCI corresponds to The CRC is determined by the network device as a check failure, and the processing unit is configured to perform an adding operation to determine the CWS.
  • the first processing unit is configured to: perform a reduction operation to determine the CWS; or,
  • the first processing unit is configured to perform an adding operation to determine the CWS.
  • the physical uplink channel carries the UL-SCH, where the UL-SCH includes transmission based on a code block group CBG, including at least one of the following:
  • the TB successfully received by the network device is determined according to the CBG successfully received by the network device, including one of the following situations: all CBGs included in the TB are successfully received by the network device The TB is considered to be successfully received by the network device; the proportion of the CBG included in the TB that is successfully received by the network device is greater than or equal to a third threshold, and the TB is considered to be successfully received by the network device; The first N consecutive CBGs included in the TB are successfully received by the network device, and the TB is considered to be successfully received by the network device, where N is a positive integer.
  • the reference time unit includes a time unit in the channel occupation time initiated by the network device, and the network device does not transmit the terminal device-specific physical downlink shared channel PDSCH in the first transmission opportunity in the channel occupation time .
  • Fig. 6 is a schematic structural diagram of another network device disclosed in an embodiment of the present application.
  • the terminal device involved in the embodiment of the present application may be the network device shown in FIG. 6.
  • FIG. 7 shows a block diagram of a possible functional unit composition of the terminal device involved in the above embodiment.
  • the terminal device 700 includes: a second second storage unit 701, a second second storage unit 701, and a second second storage unit 701; The processing unit 702 and the second second communication unit 703.
  • the second processing unit 702 is used to control and manage the actions of the terminal device.
  • the second processing unit 702 is used to support the terminal device to perform steps 201 and 202 in FIG. 2 and/or other processes used in the technology described herein.
  • the second communication unit 703 is used to support communication between the terminal device and other devices, for example, communication with a network device.
  • the terminal device may also include a second storage unit 701 for storing program codes and data of the terminal device.
  • the second processing unit 702 may be a processor or a controller
  • the second communication unit 703 may be a transceiver, a transceiver circuit, a radio frequency chip, etc.
  • the second storage unit 701 may be a memory.
  • the second processing unit 702 is used to determine a reference time unit on an unlicensed carrier, and to determine a CWS on the unlicensed carrier according to the reference time unit, and the CWS is used to perform an operation on the unlicensed carrier.
  • Channel detection is used to determine a reference time unit on an unlicensed carrier, and to determine a CWS on the unlicensed carrier according to the reference time unit, and the CWS is used to perform an operation on the unlicensed carrier.
  • the reference time unit includes the time unit in the first uplink transmission opportunity, where the second communication unit 703 The length of time between the end position of an uplink transmission opportunity and the start position of the first time domain resource is greater than or equal to the first time domain length, and the first uplink transmission opportunity is before the first time domain resource The most recent uplink transmission opportunity.
  • the first time domain length is pre-configured or agreed upon by the protocol; or the first time domain length is sent by the network device to the terminal device through instruction information; or the first time domain length It is associated with the processing capability of the network device; or the first time domain length is associated with the channel access priority.
  • the reference time unit includes the first time unit in the first uplink transmission opportunity; and/or,
  • the reference time unit includes the first time unit for transmitting a complete PUSCH in the first uplink transmission opportunity.
  • the reference time unit includes a time unit in a second uplink transmission opportunity, where the second communication unit 703 is within a second time domain length after the start of transmission of the second uplink transmission opportunity The uplink authorization or downlink feedback information sent by the network device is not received.
  • the second time domain length is pre-configured or agreed upon by agreement; or the second time domain length is sent by the network device to the terminal device through instruction information; or The second time domain length is associated with the processing capability of the network device; or the second time domain length is associated with the time domain length of the second uplink transmission opportunity; or the second time domain length corresponds to CWS Associated with the channel detection time.
  • the reference time unit includes the first time unit in the second uplink transmission opportunity; and/or,
  • the reference time unit includes the first time unit for transmitting a complete PUSCH in the second uplink transmission opportunity.
  • the reference time unit includes a time unit for sending a random access preamble; and/or,
  • the reference time unit includes a time unit for sending uplink control information.
  • the channel access scheme corresponding to the reference time unit is a type 4 channel access scheme.
  • HARQ-ACK information is transmitted on the reference time unit, and the second processing unit 702 determines the CWS on the unlicensed carrier according to the reference time unit, including at least one of the following situations :
  • the second communication unit 703 receives the first downlink grant, and the first downlink grant includes new data scheduling information of the first HARQ process, and the HARQ-ACK information includes the first HARQ Affirmative response information corresponding to the process, determining that the CWS is the minimum;
  • the second communication unit 703 receives the first downlink grant, and the first downlink grant does not include the new data scheduling information of the HARQ process corresponding to the HARQ-ACK information, add the CWS or keep all The CWS is unchanged;
  • the second communication unit 703 does not receive the first downlink grant of the HARQ process corresponding to the HARQ-ACK information, add the CWS or keep the CWS unchanged.
  • the reference time unit is located before the time when the second communication unit 703 receives the first downlink authorization, and the end time of the reference time unit is the same as that of the second communication unit 703.
  • the length of time between the moments of the first downlink authorization is greater than or equal to the length of the first time domain.
  • the random access preamble is transmitted on the reference time unit, and the second processing unit 702 determines the CWS on the unlicensed carrier according to the reference time unit, including at least one of the following situations: Species:
  • the second communication unit 703 receives the second downlink grant within the random access response window, the data scheduled by the second downlink grant includes the random access response corresponding to the target PRACH resource, and the random access preamble If the code is transmitted through the target PRACH resource, it is determined that the CWS is the minimum value;
  • the CWS is the minimum value
  • the data scheduled by the second downlink grant includes the random access response corresponding to the target PRACH resource and does not include the random access
  • the second communication unit 703 does not receive the second downlink grant within the random access response window, where the second downlink grant is used to schedule the transmission of the random access response corresponding to the target PRACH resource, the random access
  • the preamble is transmitted through the target PRACH resource, then the CWS is added or the CWS remains unchanged;
  • the second communication unit 703 determines the CWS in the random access response window and does not receive the second downlink authorization, the second downlink authorization is used to schedule the transmission of the random access response corresponding to the target PRACH resource If the random access preamble is transmitted through the target PRACH resource, the CWS remains unchanged.
  • the first PUSCH is transmitted on the reference time unit, and the first PUSCH corresponds to the second HARQ process, and the second processing unit 702 determines the unlicensed carrier according to the reference time unit.
  • CWS including at least one of the following situations:
  • the second communication unit 703 receives the first uplink grant, and the first uplink grant includes new data transmission information for scheduling at least one HARQ process in the second HARQ process, it is determined that the CWS is the minimum value ;
  • the second communication unit 703 receives the first downlink feedback information, and the first downlink feedback information includes the acknowledgement ACK information corresponding to at least one HARQ process in the second HARQ process, it is determined that the CWS is the minimum value;
  • the second communication unit 703 receives the first uplink grant, and the first uplink grant does not include new data transmission information for scheduling at least one HARQ process in the second HARQ process, add the CWS;
  • the second communication unit 703 receives the first downlink feedback information, and the first downlink feedback information does not include the acknowledgement ACK information corresponding to at least one HARQ process in the second HARQ process, add all The CWS.
  • the message 3 in the random access process is transmitted on the reference time unit, and the second processing unit 702 determines the CWS on the unlicensed carrier according to the reference time unit, including the following situations At least one of:
  • the second communication unit 703 receives a third downlink authorization, and the third downlink authorization is used to schedule the transmission of message 4 in the random access process, determine that the CWS is the minimum value;
  • the second communication unit 703 receives a second uplink authorization, and the second uplink authorization is used to schedule the retransmission of the message 3, determine that the CWS is the minimum value;
  • the second communication unit 703 receives a second uplink authorization, and the second uplink authorization is used to schedule the retransmission of the message 3, the CWS is added or the CWS remains unchanged.
  • the message 3 in the random access process is transmitted on the reference time unit, and the second processing unit 702 determines the CWS on the unlicensed carrier according to the reference time unit, including the following situations At least one of:
  • the second communication unit 703 does not receive the second uplink authorization and/or the third downlink authorization within the third time domain length after the end of the transmission of the message 3, determine the CWS, increase the CWS or keep the CWS unchanged;
  • the second communication unit 703 determines the CWS within the third time domain length after the end of the message 3 transmission, and the second communication unit 703 does not receive the second uplink authorization and/or third Downlink authorization, keep the CWS unchanged;
  • the third downlink grant is used to schedule the transmission of the message 4 in the random access process, and the second uplink grant is used to schedule the retransmission of the message 3.
  • the third time domain length is pre-configured or agreed upon by agreement; or the third time domain length is sent to the terminal device by the network device through instruction information; or the third time domain length The length of the time domain is associated with the processing capability of the network device.
  • Fig. 8 is a schematic structural diagram of another terminal device disclosed in an embodiment of the present application.
  • the second processing unit 702 is a processor
  • the second communication unit 703 is a communication interface
  • the second storage unit 701 is a memory
  • the terminal device involved in the embodiment of the present application may be the terminal device shown in FIG. 8.
  • the embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal in the above method embodiment Part or all of the steps described by the device.
  • the embodiments of the present application also provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the method embodiments described above. Part or all of the steps described in the terminal device.
  • the computer program product may be a software installation package.
  • the steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the ASIC may be located in an access network device, a target network device, or a core network device.
  • the processor and the storage medium may also exist as discrete components in the access network device, the target network device, or the core network device.
  • the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)) )Wait.

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

Abstract

L'invention concerne un procédé de détermination d'une taille de fenêtre de contention (CWS), un dispositif réseau et un équipement terminal. Le procédé consiste à : déterminer une unité de temps de référence sur une porteuse sans licence; et déterminer une CWS sur la porteuse sans licence en fonction de l'unité de temps de référence. Les modes de réalisation de la présente demande peuvent être utilisés pour déterminer ou ajuster la CWS dans une solution d'accès à un canal sur la porteuse sans licence, pour obtenir une coexistence conviviale entre des systèmes sur un spectre sans licence.
PCT/CN2019/109820 2019-10-03 2019-10-03 Procédé de détermination d'une taille de fenêtre de contention, dispositif réseau et équipement terminal Ceased WO2021062874A1 (fr)

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PCT/CN2019/109820 WO2021062874A1 (fr) 2019-10-03 2019-10-03 Procédé de détermination d'une taille de fenêtre de contention, dispositif réseau et équipement terminal

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