Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: when a first channel satisfies a first condition, a communication device sends the first channel in an SCSt mode, wherein the first condition is related to one or more of the following pieces of information: the type of the first channel, the priority corresponding to the first channel, an initial value of a channel access counter corresponding to the first channel, and information borne by the first channel. Even if the communication device has no available COT, the communication device may send the first channel in the SCSt mode if the first condition is satisfied. In the SCSt mode, the number of transmissions is relatively low and the transmission time is relatively short, so that sending the first channel in the SCSt mode can reduce the energy consumption of performing a type 1 channel access process of sending the first channel.

Description

Wireless communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method and a communication device. Background Art

[0002] Devices that need to communicate in unlicensed spectrum and lack available channel occupancy time (COT) must access a Type 1 channel. However, this requires the device to monitor the channel for a significant period of time. During this period, the device cannot enter a sleep state, resulting in higher power consumption.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method and a communication device. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a wireless communication method is provided, the method comprising: when a first channel satisfies a first condition, the communication device sends the first channel through a short control signaling transmission (SCSt); wherein the first condition is related to one or more of the following information: the type of the first channel; the priority corresponding to the first channel; the initial value of the channel access counter corresponding to the first channel; and the information carried by the first channel.

[0006] According to a second aspect, a wireless communication method is provided, the method comprising: a communication device performing a channel access process; wherein parameters of the channel access process are related to capabilities of the communication device.

[0007] In a third aspect, a communication device is provided, which includes: a sending unit, used to send a first channel through an SCSt method when the first channel meets a first condition; wherein the first condition is related to one or more of the following information: the type of the first channel; the priority corresponding to the first channel; the initial value of the channel access counter corresponding to the first channel; and the information carried by the first channel.

[0008] In a fourth aspect, a communication device is provided, comprising: an execution unit configured to execute a channel access process; wherein parameters of the channel access process are related to capabilities of the communication device.

[0009] In a fifth aspect, a communication device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the communication device executes part or all of the steps in the method of the first aspect and / or the second aspect.

[0010] In a sixth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned communication device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0011] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device to execute part or all of the steps in the methods of the above aspects.

[0012] In an eighth 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, wherein the computer program is operable to cause a communication device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0013] In a ninth aspect, an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] Even if the communication device does not have an available COT, if the first condition is met, the communication device can use SCSt to send the first channel. Because the number of transmissions and the transmission time are both shorter in the SCSt mode, sending the first channel in the SCSt mode can reduce the energy consumption of sending the first channel for the type 1 channel access process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0016] FIG2 is a diagram showing an example of a time slot structure in a sideline communication system.

[0017] FIG3 is a diagram illustrating an example of a sidelink timeslot structure in which physical sidelink feedback channel (PSFCH) resources are configured.

[0018] FIG4 is a diagram showing an example of a side slot structure in which no PSFCH resources are configured.

[0019] FIG5 is an example diagram of a single-symbol demodulation reference symbol (DMRS) frequency domain type 1. FIG.

[0020] FIG6 is an example diagram of a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH) resource pool.

[0021] FIG7 is a schematic diagram of an interlaced resource block (IRB).

[0022] FIG8 is a schematic diagram of a frame structure.

[0023] FIG9 is a schematic diagram of a resource block (RB) set of a 60 MHz carrier bandwidth.

[0024] FIG10 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0025] FIG11 is a schematic flowchart of another wireless communication method provided in an embodiment of the present application.

[0026] FIG12 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0027] FIG13 is a schematic structural diagram of another communication device provided in an embodiment of the present application.

[0028] FIG14 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solution in this application will be described below with reference to the accompanying drawings.

[0030] Communication System

[0031] Figure 1 is a diagram illustrating the system architecture of a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 located within the coverage area.

[0032] Optionally, the wireless communication system 100 may include multiple network devices and the coverage area of ​​each network device may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

[0033] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0034] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0035] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity that provides sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) communication. For example, a cellular phone and a car communicate with each other using sidelink signals. Cell phones and smart home devices can communicate with each other without relaying the communication signal through a base station. Optionally, the terminal device can be used to act as a base station.

[0036] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device (D2D), vehicle-to-vehicle (V2V), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, and a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form adopted by the network equipment.

[0037] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0038] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0039] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0040] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0041] Sideline communication

[0042] Sidelink communication (or sidelink transmission) refers to a communication technology based on sidelink (SL). Sidelink communication can be, for example, D2D or V2X. Sidelink communication supports direct communication and data transmission between terminal devices. Direct communication data transmission between terminal devices can achieve higher spectrum efficiency and lower transmission latency. For example, the Internet of Vehicles system uses sidelink communication technology.

[0043] In side communication, according to the network coverage of the terminal device, side communication can be divided into side communication within the network coverage, side communication with partial network coverage, side communication outside the network coverage and side communication controlled by the central node.

[0044] Time Slot Structure in Sideline Communication System

[0045] The following takes the NR-V2X system as an example to illustrate the time slot structure in the sideline communication system.

[0046] In NR-V2X, PSSCH and its associated PSCCH can be transmitted in the same time slot. Among them, PSCCH can occupy 2 or 3 time domain symbols. The time domain resource allocation of NR-V2X can be based on the time slot as the allocation granularity. The starting point and length of the time domain symbol used for side transmission in a time slot are configured by the parameters sl-startSLsymbols and sl-lengthSLsymbols. The last symbol in the time domain symbol used for side transmission can be used as a guard period (GP), and PSSCH and PSCCH can only use the remaining time domain symbols. However, if PSFCH transmission resources are configured in a time slot, PSSCH and PSCCH cannot occupy the time domain symbol used for PSFCH transmission, as well as the automatic gain control (AGC) and GP symbols before the symbol.

[0047] As shown in Figure 2, the network configuration sl-StartSymbol = 3, sl-LengthSymbols = 11. This configuration indicates that: 11 time domain symbols starting from symbol index 3 in a time slot can be used for sidelink transmission; PSFCH transmission resources are available in this time slot; the PSFCH occupies symbols 11 and 12; symbol 11 is used as the AGC symbol for the PSFCH; symbols 10 and 13 are used as GPs, respectively; time domain symbols available for PSSCH transmission are symbols 3 to 9; the PSCCH occupies three time domain symbols, namely symbols 3, 4, and 5; and symbol 3 is usually used as the AGC symbol.

[0048] In NR-V2X, in addition to PSCCH and PSSCH, PSFCH may also exist in a sideline time slot. As shown in Figure 3, in a time slot, the first orthogonal frequency division multiplexing (OFDM) symbol is fixed for automatic gain control AGC. On the AGC symbol, the UE copies the information sent on the second symbol. At the end of the time slot, one symbol is reserved for transceiver conversion, which is used for the UE to switch from the transmit (or receive) state to the receive (or transmit) state. In the remaining OFDM symbols, PSCCH can occupy two or three OFDM symbols starting from the second sideline symbol. In the frequency domain, the number of physical resource blocks (PRBs) occupied by PSCCH is within the subband range of a PSSCH. If the number of PRBs occupied by PSCCH is less than the size of a subchannel of PSSCH, or the frequency domain resources of PSSCH include multiple subchannels, PSCCH can be frequency-division multiplexed with PSSCH on the OFDM symbol where PSCCH is located.

[0049] The DMRS for the PSSCH in NR-V2X draws on the design of the NR Uu interface and uses multiple time-domain PSSCH DMRS patterns. Within a resource pool, the number of available DMRS patterns is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol within the pattern are shown in Table 1. Figure 4 shows a schematic diagram of the time-domain positions of four DMRS symbols when the PSSCH has 13 symbols.

[0050] Table 1

[0051] If multiple time-domain DMRS patterns are configured within the resource pool, the transmitting terminal device selects the specific time-domain DMRS pattern to use and indicates this in the first-order SCI. This design allows high-speed terminal devices to select a high-density DMRS pattern, thereby ensuring channel estimation accuracy, while low-speed terminal devices can use a low-density DMRS pattern, thereby improving spectral efficiency.

[0052] The generation method of the PSSCH DMRS sequence is almost identical to that of the PSCCH DMRS sequence. The only difference is the initialization formula c(m) of the pseudo-random sequence. init middle, Among them, p i The ith CRC bit of the PSCCH that schedules the PSSCH. L may be the number of bits of the PSCCH CRC, for example, L=24.

[0053] In the NR communication system, two frequency domain DMRS patterns are supported in PDSCH and PUSCH, namely DMRS frequency domain type 1 and DMRS frequency domain type 2. For each frequency domain type, there are two different types: single DMRS symbol and double DMRS symbol. Single-symbol DMRS frequency domain type 1 supports 4 DMRS ports, and single-symbol DMRS frequency domain type 2 can support 6 DMRS ports. In the case of double DMRS symbols, the number of supported ports is doubled. However, in sideline communication systems (such as NR-V2X), since PSSCH only needs to support two DMRS ports at most, only single-symbol DMRS frequency domain type 1 can be supported. Figure 5 is an example diagram of a single-symbol DMRS frequency domain type 1.

[0054] Determination of frequency domain resources in sideline communication systems

[0055] The following takes the NR-V2X system as an example to illustrate the determination of frequency domain resources in the sideline communication system.

[0056] Similar to LTE-V2X, the frequency domain resources in the NR-V2X resource pool are contiguous, and the frequency domain resource allocation granularity is also subchannels. A subchannel can contain any of {10, 12, 15, 20, 50, 75, 100} PRBs. The minimum subchannel size is 10 PRBs, significantly larger than the minimum subchannel size of 4 PRBs in LTE-V2X. This is primarily because the frequency domain resources of the PSCCH in NR-V2X are located within the first subchannel of its associated PSSCH. The frequency domain resources of the PSCCH are less than or equal to the size of a single PSSCH subchannel, while the time domain resources of the PSCCH occupy two or three OFDM symbols. If the subchannel size is configured too small, the available PSCCH resources will be limited, increasing the code rate and degrading PSCCH detection performance. In NR-V2X, the PSSCH subchannel size and the PSCCH frequency domain resource size are configured independently, but the PSCCH frequency domain resources must be less than or equal to the PSSCH subchannel size. The following describes the configuration parameters in the NR-V2X resource pool configuration information, which can be used to determine the frequency domain resources of the PSCCH and PSSCH resource pools.

[0057] The subchannel size (sl-SubchannelSize) indicates the number of consecutive PRBs in a subchannel in the resource pool. The value range of this parameter can be {10, 12, 15, 20, 50, 75, 100} PRBs.

[0058] The number of subchannels (sl-NumSubchannel) may indicate the number of subchannels included in the resource pool.

[0059] The subchannel start RB index (sl-StartRB-Subchannel) may indicate the start PRB index of the first subchannel in the resource pool.

[0060] The PRB number (sl-RB-Number) may indicate the number of consecutive PRBs included in the resource pool.

[0061] The PSCCH frequency domain resource indication (sl-FreqResourcePSCCH) can indicate the frequency domain resource size of the PSCCH, and the value range is {10, 12, 15, 20, 25} PRB.

[0062] When the UE determines the resource pool for PSSCH transmission or reception, the frequency domain resources included in the resource pool are sl-NumSubchannel consecutive subchannels starting with the PRB indicated by sl-StartRB-Subchannel. If the number of PRBs included in the final sl-NumSubchannel consecutive subchannels is less than the number of PRBs indicated by sl-RB-Number, the remaining PRBs cannot be used for PSSCH transmission or reception.

[0063] In NR-V2X, the frequency domain starting position of the PSCCH and the first subchannel of its associated PSSCH are aligned. Therefore, the starting position of each PSSCH subchannel is the frequency domain starting position of a possible PSCCH.

[0064] Based on the above parameters, the frequency domain range of the PSCCH and PSSCH resource pools can be determined. Figure 6 shows an example of the PSCCH and PSSCH resource pools in NR-V2X.

[0065] In NR-V2X, PSCCH can be used to carry side control information related to resource sensing. For example, the side control information may include one or more of the following: priority of the scheduled transmission; frequency domain resource allocation, which indicates the number of frequency domain resources of the PSSCH in the current time slot scheduled by the PSCCH, and the number and starting position of the frequency domain resources of up to two retransmission resources reserved; time domain resource allocation, which indicates the time domain positions of up to two retransmission resources; reference signal pattern of the PSSCH; second-order SCI format; second-order SCI code rate offset; number of PSSCH DMRS ports; modulation and coding scheme MCS; MCS table indication; number of PSFCH symbols; resource reservation period, which is used to reserve resources for another TB transmission in the next period. If inter-TB resource reservation is not activated in the resource pool configuration, this information bit field does not exist; reserved bits. The reserved bits can be 2 to 4 bits, and the specific number of bits is configured or pre-configured by the network.

[0066] Since the PSCCH is always transmitted in the same time slot as the scheduled PSSCH, and the starting position of the PRB occupied by the PSCCH is the starting position of the first subchannel of the scheduled PSSCH, the sidelink control information (SCI) format 1-A does not explicitly indicate the time-frequency domain starting position of the scheduled PSSCH.

[0067] Sidelink transmissions in unlicensed spectrum

[0068] Unlicensed spectrum is spectrum designated by countries and regions for use by radio equipment. This spectrum is generally considered shared spectrum, meaning that as long as communications equipment meets national or regional regulatory requirements for the spectrum, it can use it without having to apply for exclusive spectrum authorization from the national or regional spectrum management agency. Unlicensed spectrum may also be referred to as shared spectrum, unlicensed spectrum, unlicensed frequency band, or unlicensed frequency band.

[0069] For sidelink transmissions over unlicensed spectrum (SL-U), sidelink transmissions must meet specific regulatory requirements, which may include minimum occupied channel bandwidth (OCB) and / or maximum power spectral density (PSD).

[0070] OCB requirements can require that the channel bandwidth occupied by a UE during data transmission must not be less than 80% of the channel bandwidth. Maximum power spectral density requirements can require that the UE's transmitted power per 1MHz cannot exceed 10dBm. To meet OCB and PSD regulatory requirements, sidelink transmissions in unlicensed spectrum can adopt an IRB structure. An IRB consists of N discrete RBs in the frequency domain, with a total of M IRBs within the frequency band. The mth IRB includes RBs in the order {m, M+m, 2M+m, 3M+m, ...}.

[0071] Figure 7 is a schematic diagram of an IPB. As shown in Figure 7, the system bandwidth includes 20 RBs, including 5 IRBs (i.e., M=5). Each IRB includes 4 RBs (i.e., N=4). The frequency domain interval between two adjacent RBs in the same IRB is the same, i.e., 5 RBs apart. The numbers in the boxes in the figure represent the IRB indexes.

[0072] In the SL-U system, if IRB-based resource allocation granularity is adopted, channels such as the PSCCH and PSSCH in the SL-U system should all be based on the IRB structure. Figure 8 illustrates a frame structure in which only the PSCCH and PSSCH are included in a time slot, excluding the PSFCH. The bandwidth shown in Figure 8 includes 20 RBs, with five IRB resources configured (i.e., M = 5). Each IRB resource consists of four RBs, and the numbers in the boxes represent the IRB index. In Figure 8, the system configures the PSCCH to occupy one IRB resource and two OFDM symbols in the time domain. The PSSCH uses IRB granularity, with the first symbol in the time slot being an AGC symbol and the last symbol being a GP symbol. As shown in Figure 8, PSSCH1 occupies IRB#0 and IRB#1, with its corresponding PSCCH1 occupying IRB#0. PSSCH2 occupies IRB#2, with its corresponding PSCCH2 also occupying IRB#2. It should be noted that for simplicity, Figure 8 does not depict the resources occupied by the second-order SCI, the PSCCH DMRS, and the PSSCH DMRS.

[0073] In the unlicensed spectrum, the UE accesses the channel through LBT. LBT uses a granularity of 20 MHz in the frequency domain. Every 20 MHz is called an RB set. A carrier can include multiple RB sets, and there is a guard interval between RB sets, as shown in Figure 8.

[0074] LBT

[0075] In unlicensed spectrum, communication devices can use the unlicensed spectrum according to the "listen-before-talk" (LBT) principle.

[0076] The LBT principle may include: before a communication device uses a channel on an unlicensed spectrum to send a signal, it must first perform LBT. In the case of a successful LBT, the result of the channel monitoring is that the channel is idle. Only when the channel is idle can the communication device send a signal through the channel. If the channel monitoring result of the communication device on the channel is that the channel is busy or LBT fails, then the communication device cannot send a signal through the channel. In addition, in order to ensure fairness in the use of spectrum resources of the shared spectrum, if a communication device succeeds in LBT on a channel on an unlicensed spectrum, the duration for which the communication device can use the channel for communication transmission cannot exceed a certain duration. By limiting the maximum duration for communication after a successful LBT, this mechanism can give different communication devices the opportunity to access the shared channel, thereby allowing different communication systems to coexist in a friendly manner on the shared spectrum.

[0077] LBT can be implemented with a granularity of 20 MHz in the frequency domain. Each 20 MHz interval is called an RB Set. A carrier can include multiple RB Sets. RB Sets can be separated by guard intervals. Figure 9 shows a schematic diagram of RB Sets for a 60 MHz carrier bandwidth.

[0078] Channel access in unlicensed spectrum

[0079] A communication device can access a channel using either Type 1 or Type 2 LBT. Type 1 access is possible when the device does not have available channel occupancy time (COT). Type 2 access is possible when the device has available COT.

[0080] The following describes in detail the Type 1 channel access method and the Type 2 channel access method using a network device as an example. It is understandable that the channel monitoring process of other communication devices such as terminal devices using the Type 1 channel access method or the Type 2 channel access method is similar.

[0081] Type 1 channel access

[0082] Type 1 channel access is also known as multi-slot channel detection with random backoff based on contention window size adjustment. In Type 1, a channel access priority class (CAPC) p is selected based on the priority of the service to be transmitted. The communication device can initiate channel occupation with a length of Tmcot based on the channel access priority class p.

[0083] The default channel access mode on the network device side is type 1 channel access mode. Table 2 shows the channel access priority and its corresponding parameters when the network device performs type 1 channel access mode. In Table 2, m p It can refer to the number of fallback slots corresponding to the channel access priority p, CW p It can refer to the contention window (CW) size corresponding to the channel access priority p. min,p It can refer to the CW corresponding to the channel access priority p p Minimum value, CW max,p It can refer to the CW corresponding to the channel access priority p p The maximum value, T mcot,p It refers to the maximum channel occupancy time corresponding to the channel access priority p.

[0084] Table 2

[0085] The network device can select the corresponding channel access priority p based on the priority of the service to be transmitted, and obtain the COT on the unlicensed spectrum carrier using the Type 1 channel access method based on the channel access parameters corresponding to the channel access priority p in Table 2. Within the obtained COT, the network device can transmit continuously or discontinuously.

[0086] The above-mentioned type 1 LBT initiated by the network device may specifically include arrangement 1 to step 5.

[0087] Step 1: Network device sets counter N=N init Where N init is 0 to CW p Then, proceed to step 4.

[0088] Step 2: If N>0, the network device decrements the counter by 1, that is, N=N-1.

[0089] Step 3: The network device makes the channel length T sl (T sl The LBT listening slot (9 μs) is detected. If the listening slot is idle, proceed to step 4; otherwise, proceed to step 5.

[0090] Step 4: If N=0, the network device ends the channel access process; otherwise, execute step 2.

[0091] Step 5: The network device performs a time-length T on the channel. d (where T d =16+m p The monitoring slot detection result can be divided into two cases: one case is that at least one monitoring slot is occupied; the other case is that all monitoring slots are idle.

[0092] If the channel monitoring result is T d If all monitoring time slots are idle within the time, go to step 4; otherwise, go to step 5.

[0093] If the channel access process is completed, the network device can use the channel for transmission. In addition, the maximum time length that the network device can use the channel for transmission cannot exceed T mcot,p .

[0094] Before the network device starts step 1 of the above type 1 channel access method, the network device needs to maintain and adjust the contention window CW p Initially, the contention window CW p The size is set to the minimum value CW min,pDuring transmission, the contention window CW p The size of the CW can be determined based on the ACK or NACK information received from the terminal by the network device. p If the contention window CW p Increased to maximum CW max,p , and the maximum competition window CW max,p After a certain number of times, the competition window CW p The size can be reset to the minimum value CW min,p .

[0095] It should be noted that after a communication device successfully performs the above-mentioned Type 1 LBT, it can initiate a channel occupancy time COT on the unlicensed spectrum carrier. The communication device can transmit within the COT or share the COT with other communication devices. If the communication device does not immediately access the channel for data transmission, if the communication device needs to transmit later, it does not need to perform the above-mentioned Type 1 LBT again, but only needs to perform a shorter LBT. For example, the communication device can only perform a time of T sl +T d If the channel is idle during the monitoring period, the communication device can access the channel for transmission. If the channel is busy, the communication device needs to perform type 1 LBT again before initiating COT.

[0096] Type 2 channel access

[0097] Type 2 channel access may include type 2A (type2A), type 2B (type2B), and type 2C (type2C).

[0098] When a communication device transmits within a COT, it can access the channel using LBT of type 2A / 2B / 2C.

[0099] Under Type 2A channel access, the communication device can perform 25μs of channel monitoring before starting transmission and transmit after successful channel monitoring. Under Type 2B channel access, the communication device can perform 16μs of channel monitoring before starting transmission and transmit after successful channel monitoring. The gap between the starting position of the transmission and the end position of the previous transmission is 16μs. Under Type 2C channel access, the communication device can transmit directly. The gap between the starting position of the transmission and the end position of the previous transmission is no more than 16μs, and the length of the transmission does not exceed 584μs.

[0100] In the SL-U system, when there is no available COT, the communication device can access the channel to send the synchronization signal block (synchronizing signal / PBCH block, SS / PBCH block) through type 2A when the following conditions are met: the transmission duration does not exceed 1ms; the duty cycle of sending S-SSB does not exceed 1 / 20.

[0101] SCSt

[0102] To improve the probability of successful channel access when transmitting control signaling in unlicensed spectrum, a short control signaling transmission method has been introduced. When using short signaling transmission, a device can access the channel and transmit without sensing the channel, but conditions 1 and 2 must be met. Condition 1: Within a 50ms observation period, the number of short control signaling transmissions must be less than or equal to 50. Condition 2: Within a 50ms observation period, the duration of short control signaling transmissions must not exceed 2.5ms.

[0103] Reduced capability (RedCap) terminal devices

[0104] Some scenarios (such as smart homes and smart factories) require terminal devices to reduce complexity and cost, size, and energy consumption. To meet these requirements, some communication systems have introduced low-capability terminal devices (referred to as low-capability devices).

[0105] In some embodiments, compared with ordinary terminal devices, low-capability terminal devices can reduce the requirements of at least one of the following nine terminal capabilities, thereby reducing complexity and cost.

[0106] (1) Reduce the maximum bandwidth of the terminal device

[0107] For example, in the FR1 band, the maximum bandwidth of low-capability devices is reduced from 100 MHz to 20 MHz. Meanwhile, in the FR2 band, the maximum bandwidth of low-capability devices is reduced to 100 MHz.

[0108] (2) Reduce the number of receiving (Rx) antennas in terminal equipment

[0109] For example, on frequency bands where ordinary NR terminal devices are required to support at least 2 receive antenna ports, the minimum number of receive antennas supported by low-capability devices is 1. On these frequency bands, the number of receive antennas supported by low-capability devices can also be 2.

[0110] For example, on frequency bands where a normal NR UE is required to support at least 4 receive antenna ports, the minimum number of receive antennas supported by low-capability devices is 1. On these frequency bands, the number of receive antennas supported by low-capability devices may also be 2.

[0111] (3) Reduce the number of multiple input multiple output (MIMO) layers in terminal devices

[0112] For example, for a low-capability device with one receiving antenna, one layer of downlink (DL) MIMO may be supported. For a low-capability device with two receiving antennas, two layers of DL MIMO may be supported.

[0113] (4) Reduce the maximum modulation order

[0114] For example, for uplink (UL), in the FR1 frequency band, the highest modulation order is reduced from 64QAM to 16QAM; in the FR2 frequency band, the highest modulation order is reduced from 64QAM to 16QAM.

[0115] For example, for DL, in the FR1 frequency band, the highest modulation order is reduced from 256QAM to 64QAM; in the FR2 frequency band, the highest modulation order is reduced from 64QAM to 16QAM.

[0116] (5) Using half duplex frequency division duplex (HD-FDD)

[0117] (6) Relax the processing time of terminal equipment

[0118] (7) Reduce the maximum number of data resource bearers (DRBs) that the terminal must support

[0119] (8) Reduce the size of the layer 2 cache

[0120] (9) Reduce the length of packet data convergence protocol (PDCP) / RLC sequence number (SN)

[0121] As mentioned above, when no COT is available, a communication device must access a Type 1 channel to communicate on the unlicensed spectrum. However, this Type 1 channel access process requires the communication device to monitor the channel for a long time. During this monitoring period, the communication device cannot enter a sleep state (e.g., deep sleep), resulting in higher power consumption.

[0122] To address the above problems, the present application proposes the technical solutions shown in Figures 10 and 11 , which are described below.

[0123] The methods shown in Figures 10 and 11 can both be executed by a communication device, which may include the terminal device and / or network device described above.

[0124] Exemplarily, the communication device may include a low-capability terminal device. The low-capability terminal device may meet the requirements for low-capability terminal devices described above. For example, the low-capability terminal device may meet one or more of the following requirements: support one receive antenna; maximum transmit bandwidth less than or equal to the fifth threshold; maximum modulation order less than or equal to the sixth threshold; and belong to the first device type defined by the standard. The fifth threshold may be 20 MHz; the sixth threshold may be 64QAM; and the first device type may be a low-capability terminal type defined by the standard.

[0125] Figure 10 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application. The method shown in Figure 10 may include step S1010.

[0126] Step S1010: When the first channel satisfies the first condition, the communication device may send the first channel via the SCSt method.

[0127] It should be noted that the first channel may include a side channel. For example, the side channel may include a channel that carries data or does not carry data. Exemplarily, the side channel may include a PSSCH that carries an SL-SCH and / or a PSSCH that does not carry an SL-SCH. For another example, the side channel may include a PSFCH.

[0128] Therefore, based on this application, even if the communication device does not have an available COT, if the first condition is met, the communication device can use the SCSt method to send the first channel. Because the number of transmissions and the transmission time of the SCSt method are both shorter, sending the first channel using the SCSt method can reduce the energy consumption of sending the first channel for Type 1 LBT.

[0129] In particular, compared to conventional terminal devices, low-capability terminal devices are more sensitive to power consumption and require lower amounts of data to be transmitted. Therefore, transmitting the first channel via SCSt is feasible for low-capability terminal devices. Furthermore, the above analysis shows that using SCSt to transmit the first channel can reduce energy consumption. Therefore, the technical solution proposed in this application is more capable of meeting the power consumption requirements of low-capability terminal devices.

[0130] When the first channel is transmitted via SCSt, the communication device can access the channel. The channel access type can be Type 2. For example, the communication device can access the channel of Type 2A. It is understood that the duration of the channel access of Type 2A is much shorter than the duration of the channel access of Type 1. Therefore, based on the present application, the channel access duration can be shortened before meeting the requirements of the unlicensed spectrum.

[0131] In some embodiments, the first condition may be related to the transmission duration of the continuous transmission of the first or more channels, and / or the duty cycle of the first channel. The first channel may belong to the one or more channels that are continuously transmitted. In other words, the present application may allow the terminal device to use SCSt to transmit the first channel under the condition that the transmission duration and duty cycle restrictions are met, thereby reducing the energy loss of the terminal device performing type 1 channel access.

[0132] Illustratively, the first condition may include one or more of the following: the terminal device is a low-capability terminal; the transmission duration of one or more channels transmitted continuously is less than or equal to a first threshold; and the duty cycle of the first channel is less than or equal to a second threshold. The first threshold may be, for example, 1 ms; and the second threshold may be, for example, 1 / 20.

[0133] In some embodiments, the first condition may be related to one or more of the following information: the type of the first channel, the priority corresponding to the first channel, the initial value of the channel access counter corresponding to the first channel, and the information carried by the first channel.

[0134] The type of the first channel may be used to indicate one or more of the following information about the first channel: channel type, channel function, whether the channel carries data, etc. For example, the channel type may include: PSSCH or PSFCH. For another example, whether the channel carries data may include: whether the channel carries SL-SCH or not.

[0135] As a possible implementation, the first condition may include: the type of the first channel includes one or more of the following: PSSCH, PSFCH. That is, when the first device sends the first channel in SCSt mode, it needs to at least meet the following conditions: the first channel includes PSSCH and / or PSFCH.

[0136] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH.

[0137] The priority corresponding to the first channel may be used to indicate a channel access priority of the first channel. For example, the priority corresponding to the first channel may be represented by a CAPC.

[0138] It should be noted that the higher the priority corresponding to the first channel, the lower the value corresponding to the priority can be. Alternatively, the higher the priority corresponding to the first channel, the higher the value corresponding to the priority can be. For ease of description, the embodiments below are described using the example of a case where the higher the priority corresponding to the first channel, the lower the priority value. It is understood that the embodiments below can be simply adjusted to accommodate cases where the priority corresponding to the first channel is higher and the priority value is higher, and this application does not elaborate on this.

[0139] As a possible implementation, the first condition may include: the priority value corresponding to the first channel is greater than or equal to the third threshold. That is, in this embodiment, when the first device sends the first channel via the SCSt method, it is necessary to at least meet the following conditions: the priority value corresponding to the first channel is larger, or the priority value corresponding to the first channel is lower.

[0140] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH; the value of the priority corresponding to the first channel is greater than or equal to the third threshold.

[0141] It can be understood that, when the priority value corresponding to the first channel is larger (i.e., the priority is lower), if the communication device uses the channel access method of type 1, the channel access time corresponding to the priority value is longer. Taking the priority represented by CPAC as an example, when the value of CAPC is larger, the communication device may use a larger CW p Value determination N init , which results in a longer channel access time. In this case, based on the present application, the first channel can be transmitted in an SCSt manner to avoid unnecessary energy consumption caused by a longer channel access time.

[0142] It should be noted that the present application does not limit the value of the third threshold. For example, the third threshold can be a positive integer. Exemplarily, the third threshold can be 3 or 4.

[0143] It should be noted that the third threshold may satisfy one or more of the following: network device configuration, pre-configuration, and standard definition.

[0144] As a possible implementation, the first condition may include: an initial value of a channel access counter corresponding to the first channel is greater than or equal to a fourth threshold. That is, in this embodiment, when the first device sends the first channel via the SCSt method, it is necessary to at least meet the following conditions: the initial value of the channel access counter corresponding to the first channel is greater than or equal to the fourth threshold.

[0145] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH; the initial value of the channel access counter corresponding to the first channel is greater than or equal to the fourth threshold.

[0146] The channel access counter is described below. During the channel access process, the communication device can reduce the value of the channel access counter. When the value of the channel access counter is reduced to 0, the communication device can end the channel access process. It can be seen that the larger the initial value of the channel access counter, the longer the channel access process takes. The value of the channel access counter can be represented by N as described above, and the initial value of the channel access counter can be represented by N as described above. init express.

[0147] As analyzed above, the larger the initial value of the channel access counter, the longer the type 1 channel access process takes. In this case, based on this application, the first channel can be transmitted using the SCSt method to avoid unnecessary energy consumption caused by the long channel access time.

[0148] It should be noted that the present application does not limit the value of the fourth threshold. For example, the fourth threshold can be a positive integer.

[0149] It should be noted that the fourth threshold may satisfy one or more of the following: network device configuration, pre-configuration, and standard definition.

[0150] In some embodiments, the first condition may include: the information carried by the first channel includes specific information. That is, in this embodiment, when the first device sends the first channel via SCSt, it is necessary to at least meet the following conditions: the information carried by the first channel includes specific information.

[0151] Only when the first channel carries specific information can the first channel be sent through the SCSt method, which can avoid the situation where the first channel carries any information and occupies the channel, resulting in excessive channel occupancy.

[0152] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH; the information carried by the first channel only includes specific information.

[0153] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH; the information carried by the first channel includes specific information; the initial value of the channel access counter corresponding to the first channel is greater than or equal to the fourth threshold.

[0154] The specific information may satisfy one or more of the following: network device configuration, pre-configuration, and standard definition.

[0155] Optionally, the specific information may include one or more of the following information: COT request information, MAC CE, and MAC header.

[0156] The COT request information can be used to trigger another communication device to share an available COT with the communication device. Therefore, based on the COT request information, the communication device can obtain a shared COT, thereby avoiding performing type 1 channel access.

[0157] For example, the first condition may include one or more of the following: the transmission duration of one or more channels sent continuously does not exceed 1ms; the duty cycle of sending the first channel does not exceed 1 / 20; the first channel includes one or more of PSSCH of SL-SCH, PSSCH that does not carry SL-SCH, and PSFCH; the information carried by the first channel includes COT request information.

[0158] Figure 11 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application. The method shown in Figure 11 may include step S1110.

[0159] Step S1110: The communication device performs a channel access process.

[0160] Exemplarily, the parameters of the channel access process may include one or more of the parameters shown in Table 2. Optionally, the parameters of the channel access process may include parameters related to the channel access duration. The parameters related to the channel access duration may include one or more of the following: an initial value of a channel access counter, and a contention window size.

[0161] The parameters of the channel access process include the contention window size (through CW p For example, the CW signal used by the low-capability terminal device when performing type 1 channel access can be p The value of N can avoid the low-capability terminal device from selecting a larger channel access counter initial value (through N init indicates) is used for type 1 channel access and consumes too much energy.

[0162] In step S1110, the parameters of the channel access process are related to the capabilities of the communication device. For example, if the communication device is not a low-capability terminal device, the parameters of the channel access process can be set according to relevant technologies. For another example, if the communication device is a low-capability terminal device, the parameters of the channel access process can be set according to a first rule. Based on the first rule, the duration of the channel access process executed by the communication device can be shorter than that of a non-low-capability terminal device.

[0163] As can be seen, in this application, the parameter selection of the channel access process takes into account the capabilities of the communication device. Therefore, the duration of the channel access process can be controlled according to the capabilities of the communication device, thereby avoiding the problem of the channel access process taking a long time for communication devices with higher energy consumption requirements.

[0164] The channel access process of step S1110 may be of type 1. Although the present application may use type 1 channel access, since the channel access parameters are affected by the capabilities of the communication device, the channel access time may be shorter than that of type 1 channel access in the related art. Therefore, the method shown in FIG11 can still reduce the impact of the channel access duration on power consumption to a certain extent.

[0165] In some embodiments, the parameters of the channel access process may be parameters corresponding to the first priority. Alternatively, the first priority may be indicated by a CAPC. The value of the first priority may be less than or equal to the value of the priority corresponding to the signal to be transmitted.

[0166] For example, the value of the first priority can be represented by x, and the priority of the signal to be transmitted can be represented by p. In some embodiments, regardless of the value of p, x can be a fixed value. The fixed value can be a smaller value within the range of values ​​of p. For example, x can be 1 or 2. In some embodiments, x can vary with p, but x is always less than or equal to p.

[0167] In related technologies, channel access process parameters are determined based on the priority of the signal to be transmitted. In the present application, channel access parameters are determined based on the first priority. The value of the first priority can be less than or equal to the value of the priority of the signal to be transmitted. Therefore, if the communication device is a low-capability terminal device, the priority can be increased to shorten the channel access process.

[0168] It should be noted that the first priority may meet one or more of the following: network device configuration, pre-configuration, and standard definition.

[0169] In some embodiments, the parameters of the channel access process may be determined based on the interval in which the priority corresponding to the signal to be transmitted falls. For example, if the value of the priority corresponding to the signal to be transmitted falls within a first interval, the parameters of the channel access process may be the parameters corresponding to the first priority. For another example, if the value of the priority corresponding to the signal to be transmitted falls within a second interval, the parameters of the channel access process may be the parameters corresponding to the second priority. The first interval or the second interval may be a numerical range or a single value.

[0170] For example, when p≤3, x may be 1. For another example, when p=4, the corresponding x may be 2.

[0171] It should be noted that the second priority may meet one or more of the following: network device configuration, pre-configuration, and standard definition.

[0172] In some embodiments, the first rule may include that parameters of the channel access procedure may be determined based on a minimum configurable duration of the channel access procedure.

[0173] For example, for CW p , in the case of low-capability terminal equipment, CW p Can be set to CW min,p For example, if the channel access priority value of the signal to be transmitted by the communication device is p, then when the communication device initiates the LBT of type 1, the counter N can be set to N init Where N init Can be 0 to CW p A random number uniformly distributed between CW p Always CW as defined in Table 2 min,x . Wherein, x may represent the value of the first priority.

[0174] In some embodiments, after the communication device accesses the channel, the maximum duration of the generated COT can be determined according to the first priority. For example, after the communication device successfully performs type 1 channel access, the maximum duration of the generated COT can be T defined in Table 2. mcot,xWhen the first priority value is smaller than the priority value corresponding to the signal to be transmitted, the maximum duration of the generated COT is smaller than the maximum duration of the COT determined by the priority value corresponding to the signal to be transmitted, thereby preventing the communication device from occupying the channel for too long.

[0175] In some embodiments, the first rule may include that the parameters of the channel access process remain unchanged. For example, when the communication device initiates a type 1 LBT, the communication device may always follow the CW min,p Determine N init value, thereby avoiding generating an excessively large counter value, and further preventing the channel access process from taking too long.

[0176] For example, the parameters of the channel access process may not be updated based on HARQ-ACK feedback. For example, if the priority p corresponding to the signal to be transmitted is greater than or equal to a certain value (such as 3 or 4), due to the allowed CW p If there is a larger value in the value, the low-capability terminal device can always use CW p Set to CW min,p , i.e. not updating CW based on HARQ-ACK feedback p .

[0177] For example, when the priority of the signal to be transmitted is p, for PSCCH / PSSCH transmission without HARQ-ACK feedback, regardless of whether PSFCH resources are configured in the resource pool, the low-capability terminal device can use CW p Set to CW min,p , instead of CW p Update to a larger allowed value.

[0178] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0179] FIG12 is a schematic structural diagram of a communication device 1200 provided in an embodiment of the present application. The communication device 1200 may include a sending unit 1210 .

[0180] The sending unit 1210 is used to send the first channel via the SCSt method when the first channel meets the first condition; wherein the first condition is related to one or more of the following information: the type of the first channel; the priority corresponding to the first channel; the initial value of the channel access counter corresponding to the first channel; and the information carried by the first channel.

[0181] In some embodiments, the first condition includes one or more of the following: the type of the first channel includes one or more of the following: PSSCH, PSFCH; the priority value corresponding to the first channel is greater than or equal to the third threshold; the initial value of the channel access counter corresponding to the first channel is greater than or equal to the fourth threshold.

[0182] In some embodiments, the third threshold or the fourth threshold satisfies one or more of the following: network device configuration, pre-configuration, and standard definition.

[0183] In some embodiments, the first condition includes: the information carried by the first channel includes specific information, and the specific information includes one or more of the following information: COT request information, MAC CE, and MAC header.

[0184] In some embodiments, the specific information satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

[0185] In some embodiments, the device 1200 is further used to: perform a channel access process; wherein the type of the channel access process is type 2.

[0186] In some embodiments, the communication device 1200 is a low-capability terminal device.

[0187] In some embodiments, the low-capability terminal device satisfies one or more of the following: supports one receiving antenna; the maximum transmission bandwidth is less than or equal to the fifth threshold; the maximum modulation order is less than or equal to the sixth threshold; and belongs to the first device type defined by the standard.

[0188] In some embodiments, the fifth threshold is 20 MHz.

[0189] In some embodiments, the sixth threshold is 64QAM.

[0190] In some embodiments, the first channel is a side channel.

[0191] In an optional embodiment, the sending unit 1210 may be a transceiver 1430. The communication device 1200 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0192] FIG13 is a schematic structural diagram of a communication device 1300 provided in an embodiment of the present application. The communication device 1300 includes an execution unit 1310 .

[0193] The execution unit 1310 is configured to execute a channel access process, wherein parameters of the channel access process are related to the capabilities of the communication device.

[0194] In some embodiments, when the communication device is a low-capability terminal device, the parameters of the channel access process are set according to the first rule.

[0195] In some embodiments, the first rule includes: parameters of the channel access process are parameters corresponding to the first priority.

[0196] In some embodiments, the value of the first priority is smaller than the value of the priority corresponding to the signal to be transmitted by the communication device.

[0197] In some embodiments, the first priority satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

[0198] In some embodiments, the parameters of the channel access process are parameters corresponding to the first priority, including: when the priority value corresponding to the signal to be transmitted by the terminal device belongs to the first interval, the parameters of the channel access process are parameters corresponding to the first priority.

[0199] In some embodiments, the first priority is indicated by a CAPC.

[0200] In some embodiments, the first rule includes: determining parameters of the channel access procedure based on a minimum configurable duration of the channel access procedure.

[0201] In some embodiments, the first rule includes that parameters of the channel access procedure remain unchanged.

[0202] In some embodiments, the low-capability terminal device satisfies one or more of the following: supports one receiving antenna; the maximum transmission bandwidth is less than or equal to the fifth threshold; the maximum modulation order is less than or equal to the sixth threshold; and belongs to the first device type defined by the standard.

[0203] In some embodiments, the fifth threshold is 20 MHz.

[0204] In some embodiments, the sixth threshold is 64QAM.

[0205] In some embodiments, the type of channel access procedure is Type 1.

[0206] In some embodiments, the channel access procedure parameters include one or more of the following: a channel access counter initial value, a contention window size.

[0207] In an optional embodiment, the execution unit 1310 may be a processor 1410. The communication device 1300 may further include a transceiver 1430 and a memory 1420, as specifically shown in FIG14 .

[0208] Figure 14 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 14 indicate that the unit or module is optional. Apparatus 1400 may be used to implement the method described in the above method embodiment. Apparatus 1400 may be a chip or a communication device (e.g., a terminal device or a network device).

[0209] The device 1400 may include one or more processors 1410. The processor 1410 may support the device 1400 to implement the method described in the above method embodiment. The processor 1410 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0210] The apparatus 1400 may further include one or more memories 1420. The memories 1420 store programs that can be executed by the processor 1410, causing the processor 1410 to perform the methods described in the above method embodiments. The memories 1420 may be independent of the processor 1410 or integrated into the processor 1410.

[0211] The apparatus 1400 may further include a transceiver 1430. The processor 1410 may communicate with other devices or chips via the transceiver 1430. For example, the processor 1410 may transmit and receive data with other devices or chips via the transceiver 1430.

[0212] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the communication device provided in the present invention, and the program enables a computer to execute the method performed by the communication device in each embodiment of the present invention.

[0213] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in the present application, and the program causes a computer to execute the method performed by the communication device in each embodiment of the present application.

[0214] The embodiments of the present application also provide a computer program. The computer program can be applied to the communication device provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the communication device in each embodiment of the present application.

[0215] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0216] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0217] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0218] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0219] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0220] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0221] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0222] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0223] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0224] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0225] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0226] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0227] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0228] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that, it includes: When the first channel meets the first condition, the communication device transmits the first channel by using the short control signaling transmission SCSt mode; wherein, the first condition is related to one or more of the following information: the type of the first channel; the priority corresponding to the first channel; the initial value of the channel access counter corresponding to the first channel; the information carried by the first channel.

2. The method according to claim 1, characterized in that, the first condition includes one or more of the following: the type of the first channel includes one or more of the following: physical sidelink shared channel PSSCH, physical sidelink feedback channel PSFCH; the value of the priority corresponding to the first channel is greater than or equal to a third threshold; the initial value of the channel access counter corresponding to the first channel is greater than or equal to a fourth threshold.

3. The method according to claim 2, characterized in that, the third threshold or the fourth threshold satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

4. The method according to any one of claims 1-3, characterized in that, the first condition includes: the information carried by the first channel includes specific information, and the specific information includes one or more of the following information: channel occupancy time COT request information, media access control layer control element MAC CE, MAC header.

5. The method according to claim 4, characterized in that, the specific information satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

6. The method according to any one of claims 1-5, characterized in that, it further includes: the communication device performs a channel access procedure; wherein, the type of the channel access procedure is type 2.

7. The method according to any one of claims 1-6, characterized in that, the communication device is a low-capability terminal device.

8. The method according to claim 7, characterized in that, the low-capability terminal device satisfies one or more of the following: supports one receiving antenna; the maximum transmission bandwidth is less than or equal to a fifth threshold; the maximum modulation order is less than or equal to a sixth threshold; belongs to the first device type defined by the standard.

9. The method according to claim 8, characterized in that, the fifth threshold is 20 MHz.

10. The method according to claim 8 or 9, characterized in that, the sixth threshold is 64QAM.

11. The method according to any one of claims 1-10, characterized in that, the first channel is a sidelink channel.

12. A wireless communication method, characterized in that, it includes: the communication device performs a channel access procedure; wherein, the parameters of the channel access procedure are related to the capabilities of the communication device.

13. The method according to claim 12, characterized in that, when the communication device is a low-capability terminal device, the parameters of the channel access procedure are set according to the first rule.

14. The method according to claim 13, characterized in that, The first rule includes: The parameters of the channel access process are the parameters corresponding to the first priority.

15. The method according to claim 14, wherein, the value of the first priority is less than the value of the priority corresponding to the signal to be transmitted by the communication device.

16. The method according to claim 14 or 15, wherein, the first priority satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

17. The method according to any one of claims 14-16, wherein, the parameters of the channel access process being the parameters corresponding to the first priority include: when the value of the priority corresponding to the signal to be transmitted by the terminal device belongs to the first interval, the parameters of the channel access process are the parameters corresponding to the first priority.

18. The method according to any one of claims 14-17, wherein, the first priority is indicated by the Channel Access Priority CAPC.

19. The method according to any one of claims 13-18, wherein, the first rule includes: The parameters of the channel access process are determined based on the minimum duration that the channel access process can configure.

20. The method according to any one of claims 13-19, wherein, the first rule includes: The parameters of the channel access process remain unchanged.

21. The method according to any one of claims 13-20, wherein, the low-capability terminal device satisfies one or more of the following: supports one receiving antenna; the maximum transmission bandwidth is less than or equal to the fifth threshold; the maximum modulation order is less than or equal to the sixth threshold; belongs to the first device type defined by the standard.

22. The method according to claim 21, wherein, the fifth threshold is 20 MHz.

23. The method according to claim 21 or 22, wherein, the sixth threshold is 64QAM.

24. The method according to any one of claims 12-23, wherein, the type of the channel access process is type 1.

25. The method according to any one of claims 12-24, wherein, the channel access process parameters include one or more of the following: the initial value of the channel access counter, the size of the contention window.

26. A communication device, wherein, comprising: a sending unit, configured to transmit the first channel in a Short Control Signaling Transmission SCSt manner when the first channel meets the first condition; wherein, the first condition is related to one or more of the following information: the type of the first channel; the priority corresponding to the first channel; the initial value of the channel access counter corresponding to the first channel; the information carried by the first channel.

27. The device according to claim 26, wherein, the first condition includes one or more of the following: the type of the first channel includes one or more of the following: Physical Sidelink Shared Channel PSSCH, Physical Sidelink Feedback Channel PSFCH; the value of the priority corresponding to the first channel is greater than or equal to the third threshold; The initial value of the channel access counter corresponding to the first channel is greater than or equal to the fourth threshold.

28. The device according to claim 27, wherein, the third threshold or the fourth threshold satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

29. The device according to any one of claims 26-28, wherein, the first condition includes: the information carried by the first channel includes specific information, and the specific information includes one or more of the following information: channel occupancy time COT request information, media access control layer control unit MAC CE, MAC header.

30. The device according to claim 29, wherein, the specific information satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

31. The device according to any one of claims 26-30, wherein, the device is further configured to: perform a channel access process; wherein, the type of the channel access process is type 2.

32. The device according to any one of claims 26-31, wherein, the communication device is a low-capability terminal device.

33. The device according to claim 32, wherein, the low-capability terminal device satisfies one or more of the following: supports one receiving antenna; the maximum transmission bandwidth is less than or equal to the fifth threshold; the maximum modulation order is less than or equal to the sixth threshold; belongs to the first device type defined by the standard.

34. The device according to claim 33, wherein, the fifth threshold is 20 MHz.

35. The device according to claim 33 or 34, wherein, the sixth threshold is 64QAM.

36. The device according to any one of claims 26-35, wherein, the first channel is a sidelink channel.

37. A communication device, wherein, comprises: an execution unit for performing a channel access process; wherein, the parameters of the channel access process are related to the capabilities of the communication device.

38. The device according to claim 37, wherein, when the communication device is a low-capability terminal device, the parameters of the channel access process are set according to the first rule.

39. The device according to claim 38, wherein, the first rule includes: the parameters of the channel access process are the parameters corresponding to the first priority.

40. The device according to claim 39, wherein, the value of the first priority is less than the value of the priority corresponding to the signal to be transmitted by the communication device.

41. The device according to claim 39 or 40, wherein, the first priority satisfies one or more of the following: network device configuration, pre-configuration, standard definition.

42. The device according to any one of claims 39-41, wherein, the parameters of the channel access process being the parameters corresponding to the first priority include: when the value of the priority corresponding to the signal to be transmitted by the terminal device belongs to the first interval, the parameters of the channel access process are the parameters corresponding to the first priority.

43. The device according to any one of claims 39 - 42, characterized in that, the first priority is indicated by a Channel Access Priority CAPC.

44. The device according to any one of claims 38 - 43, characterized in that, the first rule includes: the parameters of the channel access process are determined based on the minimum duration that the channel access process can be configured.

45. The device according to any one of claims 38 - 44, characterized in that, the first rule includes: the parameters of the channel access process remain unchanged.

46. The device according to any one of claims 38 - 45, characterized in that, the low - capability terminal device satisfies one or more of the following: supports one receive antenna; the maximum transmission bandwidth is less than or equal to a fifth threshold; the maximum modulation order is less than or equal to a sixth threshold; belongs to a first device type defined by the standard.

47. The device according to claim 46, characterized in that, the fifth threshold is 20 MHz.

48. The device according to claim 46 or 47, characterized in that, the sixth threshold is 64QAM.

49. The device according to any one of claims 37 - 48, characterized in that, the type of the channel access process is type 1.

50. The device according to any one of claims 37 - 49, characterized in that, the channel access process parameters include one or more of the following: the initial value of the channel access counter, the size of the contention window.

51. A communication device, characterized in that, comprises a memory and a processor, the memory is used for storing programs, and the processor is used for calling the programs in the memory so that the communication device executes the method according to any one of claims 1 - 50.

52. A device, characterized in that, comprises a processor, which is used for calling a program from a memory so that the device executes the method according to any one of claims 1 - 50.

53. A chip, characterized in that, comprises a processor, which is used for calling a program from a memory so that the device installed with the chip executes the method according to any one of claims 1 - 50.

54. A computer - readable storage medium, characterized in that, a program is stored thereon, and the program enables a computer to execute the method according to any one of claims 1 - 50.

55. A computer program product, characterized in that, comprises a program, and the program enables a computer to execute the method according to any one of claims 1 - 50.

56. A computer program, characterized in that, the computer program enables a computer to execute the method according to any one of claims 1 - 50.

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