WO2021062874A1

WO2021062874A1 - Method for determining contention window size, network device, and terminal device

Info

Publication number: WO2021062874A1
Application number: PCT/CN2019/109820
Authority: WO
Inventors: 吴作敏
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-10-03
Filing date: 2019-10-03
Publication date: 2021-04-08
Also published as: CN114208080B; CN114208080A

Abstract

Disclosed are a method for determining a contention window size (CWS), a network device, and a terminal device. The method comprises: determining a reference time unit on an unlicensed carrier; and determining a CWS on the unlicensed carrier according to the reference time unit. The embodiments of the present application can be used for determining or adjusting the CWS in a channel access solution on the unlicensed carrier, so as to achieve friendly coexistence between systems on an unlicensed spectrum.

Description

Method for determining the size of the competition window, network equipment, terminal equipment

Technical field

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.

Background technique

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.

In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, some countries or regions have stipulated the legal requirements that must be met when using unlicensed spectrum. For example, communication equipment follows the "Listen Before Talk (LBT)" principle, that is, the communication equipment needs to perform channel detection before sending signals on channels of unlicensed spectrum, only when the channel detection result is channel When it is idle, the communication device can send signals; if the channel detection result of the communication device on the channel of the unlicensed spectrum is that the channel is busy, the communication device cannot send signals.

The communication device performs channel detection on the unlicensed carrier according to the contention window size (Contention Window Size, CWS). However, the current competition window size is determined based on the Long Term Evolution-Licensed-Assisted Access (LTE-LAA) system. The NR system on the unlicensed frequency band supports more flexibility than the LTE-LAA system. Time slot structure, scheduling timing and Hybrid Automatic Repeat (HARQ) timing, how to perform reference time unit and competition in the NR (NR-based access to unlicensed spectrum, NR-U) system on the unlicensed frequency band The determination of the window size to realize the friendly coexistence between the systems on the unlicensed spectrum is a problem that needs to be solved urgently at present.

Summary of the invention

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. Friendly coexistence between the two.

In the first aspect, an embodiment of the present application provides a method for determining CWS, including:

Determining a reference time unit on an unlicensed carrier, where 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, where the CWS is used to perform channel detection on the unlicensed carrier.

In a second aspect, 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.

In a third aspect, 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. In a possible design, 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. Further, 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. Further, 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.

In a fourth aspect, 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.

In a fifth aspect, 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.

In a sixth 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.

In a seventh aspect, 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.

In an eighth aspect, 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.

In a ninth 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.

It can be seen that in this embodiment of the application, 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 In the CWS, the CWS is used to perform channel detection on the unlicensed carrier to achieve friendly coexistence between systems on the unlicensed spectrum.

Description of the drawings

The following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art.

Fig. 1 is a schematic structural diagram of a possible communication system disclosed in an embodiment of the present application;

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;

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.

Detailed ways

The following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Exemplarily, 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. Optionally, 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.

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. 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". Examples of 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. 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.

Optionally, direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.

Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, 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.

Optionally, 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.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be called communication devices. Taking the communication system 100 shown in FIG. 1 as an example, 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.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

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. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, 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. Only when the channel detection result is that the channel is idle, 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. Optionally, the bandwidth of the LBT is 20 MHz, or an integer multiple of 20 MHz.

In the embodiment of the present application, the communication device may adopt a corresponding channel access scheme to perform LBT operation. In order to facilitate understanding, 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 μs.

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 (Cat-3LBT): LBT with random fallback based on a fixed contention window size (Contention Window Size, CWS). At this time, 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 (Cat-4LBT): LBT based on random fallback of variable CWS. At this time, 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.

As an example, the specific implementation for the above Cat-4LBT channel access scheme is as follows:

1) Set the counter N=N _init , where N _init is a random number uniformly distributed between 0 and CWp;

2) Perform channel idle detection (Clear Channel Assessment, 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;

3) If the channel is detected to be busy, then the channel idle state for a certain period of time needs to be detected before the CCA time slot detection can be restored;

4) When N=0, 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).

Among them, 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.

From the above description, the difference between 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.

In addition, Cat-3LBT and Cat-4LBT can further distinguish the priority of the channel access scheme according to the priority of the transmission service. In other words, 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.

Table 1: Uplink channel access parameters

As shown in Table 1, when the backoff parameter in the channel access sub-scheme is 2, the minimum CWS is 3, the maximum CWS is 7, and the maximum channel occupancy time is 2ms, the corresponding channel access priority is 1 (ie Cat-4 Highest priority). When 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. When 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. When 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.

Correspondingly, the channel access parameters under different priorities during downlink channel access can be as shown in Table 2.

Table 2: Downlink channel access parameters

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.

In order to better understand the method for determining the size of the contention window disclosed in the embodiments of the present application, network equipment, terminal equipment, the following describes the related concepts of signal transmission on the unlicensed spectrum.

CWS: Refers to the length of the contention window, which can be used for channel detection of unlicensed carriers.

Maximum Channel Occupancy Time (MCOT): refers to the maximum length of time allowed to use unlicensed spectrum channels for signal transmission after successful LBT. There are different MCOTs under different channel access priorities. Exemplarily, the current maximum value of MCOT may be 10 ms. It should be understood that the MCOT is the time occupied by signal transmission.

Channel Occupancy Time (COT): 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. Among them, 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 (gNB-initiated COT): 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 (UE-initiated COT): 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 (DL burst): 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 μs. If the gap between two downlink transmissions performed by the network device is greater than a preset value, for example, 16 μs, then the two downlink transmissions are considered to belong to two downlink transmission opportunities.

Uplink transmission opportunity (UL burst): 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 μs. If the gap between two uplink transmissions performed by the UE is greater than a preset value such as 16 μs, then the two uplink transmissions are considered to belong to two uplink transmission opportunities.

Based on the schematic diagram of the communication system shown in FIG. 1, please refer to FIG. 2, which 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.

Among them, 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.

Optionally, the reference time unit may include one or more time units.

Optionally, the reference time unit may include part or all of the time units in a transmission opportunity.

In the embodiment of the present application, the physical uplink channel includes a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH). Wherein, 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. Optionally, when the PUSCH includes the UL-SCH, the PUSCH is transmitted based on a code block group (CBG).

S202: Determine the CWS on the unlicensed carrier according to the reference time unit.

In this step, the CWS can be determined according to the physical uplink channel transmitted on the reference time unit. When the channels or signals transmitted on the reference time unit are not the same, the method of determining or adjusting the CWS is also different.

Optionally, 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. Optionally, 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). In other words, the first channel access priority can be represented by p.

In the embodiment of the present application, 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.

Optionally, 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. As shown in Figure 3, in the first downlink transmission opportunity within the channel occupation time initiated by the network device, 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. In this downlink transmission opportunity, 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.

In an implementation manner, 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).

Wherein, the CSI Part 1 or CSI Part 2 reflects the downlink channel quality status of the terminal device.

Optionally, the physical uplink channel includes PUCCH.

Optionally, 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.

Optionally, the reference time unit is used to transmit the UCI.

It should be understood that when 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. For example, 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. LBT, if LBT succeeds, HARQ feedback or CSI report is performed on the uplink resource, if LBT fails, HARQ feedback or CSI report is not performed on the uplink resource, or the terminal device does not receive the HARQ feedback or CSI report triggered by the network device Authorization information, 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.

Optionally, 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.

It should be understood that since the HARQ-ACK information, CSI part 1 and CSI part 2 included in UCI can be independently coded, 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.

Optionally, if the CRC corresponding to the at least one UCI is determined to be successful by the network device, 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.

Optionally, if the CRC corresponding to all UCIs in the UCI is determined by the network device to be successful, 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.

Optionally, if the number of UCIs in the UCI that are determined by the network device to be successful in the CRC check or the UCI ratio exceeds a preset value, 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.

Optionally, if the number of UCIs in the UCI that are determined by the network device to fail the CRC check or the UCI ratio exceeds a preset value, 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.

In an implementation manner, 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:

If the proportion of CBGs successfully received by the network device on the reference time unit is less than a first threshold, perform an increase operation to determine the CWS;

If the proportion of CBGs successfully received by the network device on the reference time unit is greater than or equal to the first threshold, perform a reduction operation to determine the CWS;

If the proportion of TBs successfully received by the network device in the reference time unit is less than a second threshold, perform an increase operation to determine the CWS;

If the proportion of TBs successfully received by the network device on the reference time unit is greater than or equal to the second threshold, perform a reduction operation to determine the CWS;

Wherein, the TB successfully received by the network device is determined according to the CBG successfully received by the network device.

It should be understood that if UL-SCH includes CBG-based transmission, on the receiving side, 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.

Optionally, the network device may convert the CBG decoding result into the TB decoding result, which may include at least one of the following methods:

If the CRC check of all CBGs included in the TB passes and the CRC check of the TB passes, the decoding result of the TB is considered correct, otherwise, the decoding result of the TB is considered wrong;

If the CRC of all CBGs included in the TB passes, the decoding result of the TB is considered correct, otherwise, the decoding result of the TB is considered incorrect;

If the proportion of CBGs that pass the CRC check in all CBGs included in the TB is greater than or equal to the third threshold, the decoding result of the TB is considered correct; otherwise, the decoding result of the TB is considered incorrect;

If the CRC of the first N consecutive CBGs among all the CBGs included in the TB passes, 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.

Optionally, the third threshold is 80%.

Optionally, 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.

Optionally, 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. As shown in Fig. 4, in the reference time unit in the channel occupancy time initiated by the terminal device, the terminal device performs physical uplink channel transmission, for example, the terminal device performs PUSCH or PUCCH transmission. In this reference time unit, 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.

Optionally, the physical uplink channel includes PUCCH.

Optionally, the reference time unit is used to transmit the UCI.

Optionally, the reference time unit is used to transmit the UCI, and 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.

In one implementation, 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.

Optionally, 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.

On the unlicensed spectrum, 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.

Optionally, 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.

Optionally, 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:

If the CRC corresponding to the at least one UCI is determined to be successful by the network device, 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;

If the CRC corresponding to all UCIs in the UCI is determined by the network device to be successful, 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;

If the number of UCIs or UCI ratios in the UCI whose CRC check is determined to be successful by the network device exceeds a preset value, 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;

If the number of UCIs or UCI ratios in the UCI that are determined by the network device to fail the CRC check exceeds a preset value, 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.

It should be noted that in this case, when 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.

Correspondingly, if the terminal device receives the ACK corresponding to the first HARQ process in the downlink feedback information, it 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.

Optionally, when the method in the embodiment of the present application is applied to a network device, performing a reduction operation to determine the CWS includes at least one of the following situations:

It is determined that 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;

Assuming that the previous CWS was the second CWS and the CWS was the first CWS, determining that the second CWS is the first CWS, or keeping the second CWS unchanged;

Assuming that the previous CWS is the second CWS, and the CWS is the first CWS, if the second CWS is the initial value, that is, the minimum value in the value range of the CWS under the corresponding priority, it is determined that 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.

Optionally, when the method in the embodiment of the present application is applied to a network device, performing an adding operation to determine the CWS includes at least one of the following situations:

Assuming that the previous CWS was the second CWS, the CWS was the first CWS, and 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.

Optionally, when the method in the embodiment of the present application is applied to a terminal device, performing a reduction operation to determine the CWS includes at least one of the following situations:

Set the CWS to the minimum value in the value range of the CWS, such as the minimum value of the CWS in Table 1, or set the CWS to the initial value;

Assuming that the previous CWS is the second CWS, and the CWS is the first CWS, if the second CWS is the initial value, that is, the minimum value in the value range of the CWS under the corresponding priority, it is determined that 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.

Optionally, when the method in the embodiment of the present application is applied to a terminal device, performing an adding operation to determine the CWS includes at least one of the following situations:

Assuming that the previous CWS was the second CWS, the CWS was the first CWS, and 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. If the second CWS is the maximum value in the CWS range under the corresponding priority, the second CWS should be increased. In order to keep the maximum value of the first CWS unchanged, but after the maximum value is maintained for K times, the first CWS is reset to the initial value, 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 foregoing mainly introduces the solution of the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, the terminal equipment and the network equipment include hardware structures and/or software modules corresponding to the respective functions. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, 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. For example, 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. As shown in FIG. 5, 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, and the first communication unit 503 may be a transceiver, a transceiver circuit, a radio frequency chip, or the like.

Wherein, 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.

Specifically, the physical uplink channel carries at least one of uplink control information UCI and uplink shared channel UL-SCH.

Specifically, 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.

Specifically, the reference time unit is used for transmitting the UCI, and 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.

Specifically, if the CRC corresponding to the at least one UCI is determined to be successful by the network device, 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.

Specifically, if the CRC corresponding to the UCI is determined to be successful by the network device, the first processing unit is configured to: perform a reduction operation to determine the CWS; or,

If the CRC corresponding to the at least one UCI is determined by the network device to fail the check, the first processing unit is configured to perform an adding operation to determine the CWS.

Specifically, 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:

If the proportion of TBs successfully received by the network device in the reference time unit is greater than or equal to the second threshold, perform a reduction operation to determine the CWS.

Specifically, 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. When the first storage unit 501 is a memory, the first processing unit 502 is a processor, and the first communication unit 503 is a communication interface, the terminal device involved in the embodiment of the present application may be the network device shown in FIG. 6.

In the case of using an integrated unit, 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. For example, 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., and the second storage unit 701 may be a memory.

Wherein, 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.

In a possible example, if the second communication unit 703 receives uplink grant or downlink feedback information on the first time domain resource, 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.

In a possible example, 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.

In a possible example, 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.

In a possible example, 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.

In a possible example, 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.

In a possible example, 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.

In a possible example, 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.

In a possible example, the channel access scheme corresponding to the reference time unit is a type 4 channel access scheme.

In a possible example, 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 :

If 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;

If 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;

If 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.

In a possible example, 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.

In a possible example, 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:

If 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;

If the second communication unit 703 receives a second downlink authorization in the random access response window, and the data scheduled by the second downlink authorization includes the random access response corresponding to the random access preamble, it is determined The CWS is the minimum value;

If 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 does not include the random access The random access response corresponding to the preamble, where the random access preamble is transmitted through the target PRACH resource, then the CWS is increased or the CWS remains unchanged;

If 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;

If 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.

In a possible example, 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:

If 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 ；

If 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;

If 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;

If 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.

In a possible example, 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:

If 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;

If 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;

If 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.

If 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;

If 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;

Wherein, 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.

In a possible example, 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. When the second processing unit 702 is a processor, the second communication unit 703 is a communication interface, and 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. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in an access network device, a target network device, or a core network device. Of course, 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.

Those skilled in the art should be aware that, in one or more of the foregoing examples, 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. When implemented by 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. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. 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. For example, 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.

The specific implementations described above further describe the purpose, technical solutions, and beneficial effects of the embodiments of the application in detail. It should be understood that the foregoing descriptions are only specific implementations of the embodiments of the application, and are not used for To limit the protection scope of the embodiments of the application, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the application shall be included in the protection scope of the embodiments of the application.

Claims

A method for determining the size of the competition window CWS is characterized in that it includes:

Determining a reference time unit on an unlicensed carrier, where 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, where the CWS is used to perform channel detection on the unlicensed carrier.
The method according to claim 1, wherein the method is applied to a network device, wherein the physical uplink channel carries at least one of uplink control information UCI and uplink shared channel UL-SCH.
The method according to claim 2, wherein the physical uplink channel carries the UCI and does not carry the UL-SCH, wherein the UCI includes hybrid automatic retransmission request response HARQ information, the first part of the channel status At least one of the information CSI Part 1 and the second part of channel state information CSI Part 2.
The method according to claim 3, wherein the reference time unit is used to transmit the UCI, and the determining the CWS on the unlicensed carrier according to the reference time unit comprises:

The CWS is determined according to a cyclic redundancy check CRC corresponding to at least one UCI included in the UCI.
The method according to claim 4, wherein the determining the CWS according to the cyclic redundancy check CRC corresponding to the at least one UCI comprises:

If the CRC corresponding to the at least one UCI is determined by the network device to be successful, perform a reduction operation to determine the CWS; or,

If the CRC corresponding to the UCI is determined by the network device to fail the verification, an addition operation is performed to determine the CWS.
The method according to claim 4, wherein the determining the CWS according to the cyclic redundancy check CRC corresponding to the at least one UCI comprises:

If the CRC corresponding to the UCI is determined by the network device to be successful, perform a reduction operation to determine the CWS; or,

If the CRC corresponding to the at least one UCI is determined by the network device to fail the verification, an addition operation is performed to determine the CWS.
The method according to claim 2, wherein the physical uplink channel carries the UL-SCH, wherein the UL-SCH includes transmission based on a code block group CBG, and the determination is based on the reference time unit The CWS on the unlicensed carrier includes at least one of the following:

If the proportion of CBGs successfully received by the network device on the reference time unit is less than a first threshold, perform an increase operation to determine the CWS;

If the proportion of CBGs successfully received by the network device on the reference time unit is greater than or equal to the first threshold, perform a reduction operation to determine the CWS;

If the proportion of TBs successfully received by the network device in the reference time unit is less than a second threshold, perform an increase operation to determine the CWS;

If the proportion of TBs successfully received by the network device on the reference time unit is greater than or equal to the second threshold, perform a reduction operation to determine the CWS;

Wherein, the TB successfully received by the network device is determined according to the CBG successfully received by the network device.
The method according to claim 7, wherein 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 according to any one of claims 2 to 8, wherein the reference time unit comprises a time unit in the channel occupation time initiated by the network device, and the network device is in the channel occupation time The physical downlink shared channel PDSCH dedicated to the terminal equipment is not transmitted in the first transmission opportunity.
The method according to claim 1, wherein the method is applied to a terminal device, wherein the physical uplink channel carries the UCI and does not carry the UL-SCH, wherein the UCI includes a hybrid automatic request At least one of the retransmission response HARQ information, the first part of channel state information CSI Part 1, and the second part of channel state information CSI Part 2.
The method according to claim 10, wherein the reference time unit is used to transmit the UCI, and the determining the CWS on the unlicensed carrier according to the reference time unit comprises:

The CWS is determined according to a detection result corresponding to at least one UCI included in the UCI.
The method according to claim 11, wherein the determining the CWS according to a detection result corresponding to at least one UCI included in the UCI comprises:

The CWS is determined according to downlink feedback information, where the downlink feedback information includes a detection result corresponding to the at least one UCI, and the downlink feedback information is sent by the network device.
The method according to claim 12, wherein 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 detection result corresponding to the at least one UCI includes:

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 method according to claim 13, wherein 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, comprising:

If the CRC corresponding to the at least one UCI is determined to be successful by the network device, the feedback information corresponding to the first HARQ process includes an acknowledgement ACK; or,

If the CRC corresponding to the UCI is determined by the network device to fail the check, the feedback information corresponding to the first HARQ process includes a negative acknowledgement NACK.
The method according to any one of claims 12 to 14, wherein the terminal device determining the CWS according to downlink feedback information comprises:

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the at least one type of UCI is successfully checked by the network device, execute a reduction operation to determine the CWS;

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the UCI is determined by the network device to be a check failure, perform an add operation to determine the CWS.
The method according to claim 13, wherein 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, comprising:

If the CRC corresponding to the UCI is determined by the network device to be successful, the feedback information corresponding to the first HARQ process includes an acknowledgement ACK; or,

If the CRC corresponding to the at least one UCI is determined by the network device to fail the check, the feedback information corresponding to the first HARQ process includes a negative acknowledgement NACK.
The method according to any one of claims 12, 13, and 16, wherein the terminal device determining the CWS according to downlink feedback information comprises:

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the UCI is successfully verified by the network device, perform a reduction operation to determine the CWS;

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the at least one UCI is determined by the network device to be a check failure, perform an adding operation to determine the CWS.
The method according to any one of claims 10 to 17, wherein the reference time unit comprises a time unit in the channel occupation time initiated by the terminal device, and the channel access scheme corresponding to the reference time unit It is a type 4 channel access scheme.
A network device, characterized in that the network device includes a first processing unit, wherein:

The first processing unit is used to determine a reference time unit on an unlicensed carrier, and the reference time unit is used to transmit a physical uplink channel; the first processing unit is also used to determine the unlicensed time unit according to the reference time unit The CWS on the carrier, where the CWS is used to perform channel detection on the unlicensed carrier.
The network device according to claim 19, wherein the physical uplink channel carries at least one of uplink control information UCI and uplink shared channel UL-SCH.
The network device according to claim 20, wherein the physical uplink channel carries the UCI and does not carry the UL-SCH, wherein the UCI includes HARQ information, the first part of the channel At least one of the state information CSI Part1 and the second part of the channel state information CSI Part 2.
The network device according to claim 21, wherein the reference time unit is used to transmit the UCI, and the first processing unit is used to determine the CWS on the unlicensed carrier according to the reference time unit, Including: the first processing unit is configured to determine the CWS according to a cyclic redundancy check CRC corresponding to at least one UCI included in the UCI.
The network device according to claim 22, wherein the first processing unit is configured to determine the CWS according to a cyclic redundancy check (CRC) corresponding to at least one UCI included in the UCI, comprising:

If the CRC corresponding to the at least one UCI is determined to be successful by the network device, the first processing unit is configured to: perform a reduction operation to determine the CWS; or,

If the CRC corresponding to the UCI is determined by the network device to fail the check, the processing unit is configured to perform an adding operation to determine the CWS.
The network device according to claim 22, wherein the first processing unit is configured to determine the CWS according to a cyclic redundancy check (CRC) corresponding to at least one UCI included in the UCI, comprising:

If the CRC corresponding to the UCI is determined by the network device to be successful, the first processing unit is configured to: perform a reduction operation to determine the CWS; or,

If the CRC corresponding to the at least one UCI is determined by the network device to fail the check, the first processing unit is configured to perform an adding operation to determine the CWS.
The network device according to claim 20, wherein the physical uplink channel carries the UL-SCH, wherein the UL-SCH includes transmission based on a code block group CBG, and the first processing unit is configured to The determination of the CWS on the unlicensed carrier according to the reference time unit includes at least one of the following:

If the proportion of CBGs successfully received by the network device on the reference time unit is less than a first threshold, the first processing unit is configured to: perform an increase operation to determine the CWS;

If the proportion of the CBG successfully received by the network device on the reference time unit is greater than or equal to the first threshold, the first processing unit is configured to: perform a reduction operation to determine the CWS;

If the proportion of TBs successfully received by the network device in the reference time unit is less than a second threshold, the first processing unit is configured to: perform an increase operation to determine the CWS;

If the proportion of TBs successfully received by the network device on the reference time unit is greater than or equal to the second threshold, the first processing unit is configured to: perform a reduction operation to determine the CWS;

Wherein, the TB successfully received by the network device is determined according to the CBG successfully received by the network device.
The network device according to claim 25, wherein 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 network device according to any one of claims 19 to 26, wherein the reference time unit comprises a time unit in the channel occupation time initiated by the network device, and the network device is in the channel occupation time The physical downlink shared channel PDSCH dedicated to the terminal equipment is not transmitted in the first transmission opportunity in.
A terminal device, characterized in that the terminal device includes a second processing unit, wherein:

The second processing unit is used to determine a reference time unit on an unlicensed carrier, the reference time unit is used to transmit a physical uplink channel; the second processing unit is also used to determine the unlicensed time unit according to the reference time unit The CWS on the carrier, where the CWS is used to perform channel detection on the unlicensed carrier.
The terminal device according to claim 28, wherein the physical uplink channel carries the UCI and does not carry the UL-SCH, wherein the UCI includes HARQ information, the first partial channel At least one of the state information CSI Part1 and the second part of the channel state information CSI Part 2.
The terminal device according to claim 29, wherein the reference time unit is used to transmit the UCI, and the second processing unit is further used to determine the CWS on the unlicensed carrier according to the reference time unit. ,include:

The second processing unit is further configured to determine the CWS according to a detection result corresponding to at least one UCI included in the UCI.
The terminal device according to claim 30, wherein the second processing unit is further configured to determine the CWS according to a detection result corresponding to at least one UCI included in the UCI, comprising:

The second processing unit is further configured to determine the CWS according to downlink feedback information, wherein the downlink feedback information includes a detection result corresponding to the at least one UCI, and the downlink feedback information is sent by the network device .
The terminal device according to claim 31, wherein the physical uplink channel comprises a first physical uplink shared channel PUSCH, and the first PUSCH corresponds to a first hybrid automatic retransmission HARQ process, and the downlink feedback information The detection result corresponding to the at least one UCI includes:

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 terminal device according to claim 32, wherein 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, including:

If the CRC corresponding to the at least one UCI is determined to be successful by the network device, the feedback information corresponding to the first HARQ process includes an acknowledgement ACK; or,

If the CRC corresponding to the UCI is determined by the network device to fail the check, the feedback information corresponding to the first HARQ process includes a negative acknowledgement NACK.
The terminal device according to any one of claims 31 to 33, wherein the second processing unit is further configured to determine the CWS according to downlink feedback information, comprising:

If the terminal device determines that the CRC corresponding to the at least one UCI is successfully checked by the network device according to the downlink feedback information, the second processing unit is further configured to: perform a reduction operation to determine the CWS;

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the UCI is determined to have failed by the network device, the second processing unit is further configured to perform an adding operation to determine the CWS.
The terminal device according to claim 32, wherein 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, including:

If the CRC corresponding to the UCI is determined by the network device to be successful, the feedback information corresponding to the first HARQ process includes an acknowledgement ACK; or,

If the CRC corresponding to the at least one UCI is determined by the network device to fail the check, the feedback information corresponding to the first HARQ process includes a negative acknowledgement NACK.
The method according to any one of claims 31, 32, 35, wherein the second processing unit is further configured to determine the CWS according to downlink feedback information, comprising:

If the terminal device determines that the CRC corresponding to the UCI is successfully verified by the network device according to the downlink feedback information, the second processing unit is further configured to: perform a reduction operation to determine the CWS;

If the terminal device determines, according to the downlink feedback information, that the CRC corresponding to the at least one UCI is determined to have failed the verification by the network device, the second processing unit is further configured to perform an adding operation to determine the CWS.
The method according to any one of claims 28 to 36, wherein the reference time unit comprises a time unit in the channel occupation time initiated by the terminal device, and the channel access scheme corresponding to the reference time unit It is a type 4 channel access scheme.
A network device, characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, The program includes instructions for performing the steps in the method according to any one of claims 1-9.
A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1-9.
A terminal device, characterized by comprising a processor, a memory, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, the program Including instructions for performing the steps in the method according to any one of claims 1, 10-18.
A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1, 10-18.