Method and terminal device for wireless communication and storage medium

Abstract

Provided are a method and a terminal device for wireless communication. The method comprises: a terminal device sending or receiving a first PSSCH in a first time slot, wherein the first time slot is also used for transmitting a first reference signal, and the first reference signal is used for sidelink positioning. In the embodiments of the present application, the terminal device can transmit a reference signal (i.e. a first reference signal) for sidelink positioning in a time slot for transmitting other sidelink information, that is, the first reference signal resource and the resource of other sidelink information share a resource pool, so as to realize sidelink positioning.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202380093180.X, entitled "Method and Terminal Apparatus for Wireless Communication," which entered the Chinese national phase of PCT international patent application PCT / CN2023 / 111226 filed on August 4, 2023. The contents of these applications are incorporated herein by reference in their entirety. Technical Field

[0002] This application relates to the field of communication technology, and more specifically, to a method and terminal device for wireless communication, as well as a storage medium. Background Technology

[0003] Some communication systems, such as new radio (NR) systems, have introduced sidelink-based positioning to enhance positioning technology. Determining the availability of reference signals for sidelink positioning, such as sidelink positioning reference signals (SL PRS), is a problem that needs to be solved. Summary of the Invention

[0004] This application provides a method and terminal device for wireless communication. The various aspects covered in this application are described below.

[0005] In a first aspect, a method for wireless communication is provided, comprising: a terminal device transmitting or receiving a first PSSCH in a first time slot, wherein the first time slot is further used to transmit a first reference signal, the first reference signal being used for lateral positioning.

[0006] In a second aspect, a terminal device is provided, the terminal device including a transceiver module for transmitting or receiving a first PSSCH in a first time slot, wherein the first time slot is further used to transmit a first reference signal, the first reference signal being used for lateral positioning.

[0007] Thirdly, a terminal device is provided, including a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to invoke the computer programs in the memory to cause the communication device to perform some or all of the steps in the method of the first aspect.

[0008] Fourthly, embodiments of this application provide a communication system that includes the aforementioned terminal device. In another possible design, the system may further include other devices that interact with the terminal device as described in the embodiments of this application.

[0009] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that causes a terminal device to perform some or all of the steps in the methods described above.

[0010] Sixthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a terminal device to perform some or all of the steps of the methods described in the above aspects. In some implementations, the computer program product may be a software installation package.

[0011] In a seventh aspect, embodiments of this application provide a computer program operable to cause a communication device to perform some or all of the steps in the methods described above.

[0012] Eighthly, embodiments of this application provide a chip including a memory and a processor, the processor being able to 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.

[0013] In this embodiment of the application, the terminal device can transmit a reference signal (i.e., a first reference signal) for lateral positioning in the time slots for transmitting and receiving other lateral information. In other words, the resources of the first reference signal and other lateral information share the resource pool to achieve lateral positioning. Attached Figure Description

[0014] Figure 1 This is a system architecture example diagram of a wireless communication system applicable to the embodiments of this application;

[0015] Figure 2 This is an example diagram illustrating a scenario of lateral communication within network coverage;

[0016] Figure 3 This is an example diagram of a scenario involving side-by-side communication within partial network coverage.

[0017] Figure 4 This is an example diagram illustrating a scenario of side-channel communication outside of network coverage;

[0018] Figure 5 This is a scenario example diagram based on side-by-side communication from a central control node;

[0019] Figure 6 This is an example diagram of a broadcast-based side-by-side communication method;

[0020] Figure 7 This is an example diagram of a side-by-side communication method based on unicast;

[0021] Figure 8This is an example diagram of a multicast-based side-by-side communication method;

[0022] Figure 9 This is an example diagram of the time slot structure of a side-following communication system;

[0023] Figure 10 This is an example diagram of the structure of a second-order SCI in a time slot;

[0024] Figure 11 This is an example diagram showing the temporal location of a PSCCH DMRS symbol within a time slot;

[0025] Figure 12 This is an example diagram of single-symbol DMRS frequency domain type 1;

[0026] Figure 13 This is an example diagram of resources used for transmitting DL PRS;

[0027] Figure 14 This is a schematic diagram of the structure of interwoven resource blocks;

[0028] Figure 15 This is an example diagram of the frame structure of the SL-U system;

[0029] Figure 16 Here is an example diagram of the RB set;

[0030] Figure 17 This is a flowchart illustrating a method for wireless communication provided in an embodiment of this application;

[0031] Figure 18 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application;

[0032] Figure 19 This is a schematic diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0033] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0034] Communication system architecture

[0035] Figure 1 This is a system architecture example diagram of a wireless communication system 100 applicable to embodiments of this 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 geographical area and may communicate with the terminal device 120 located within that coverage area.

[0036] Figure 1An exemplary network device and a terminal device are shown. Optionally, the wireless communication system 100 may include one or more network devices 110 and / or one or more terminal devices 120. For a network device 110, the one or more terminal devices 120 may all be located within the network coverage area of ​​the network device 110, or all may be located outside the network coverage area of ​​the network device 110, or some may be located within the coverage area of ​​the network device 110 and others outside the network coverage area. This application embodiment does not limit this.

[0037] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0038] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th generation (5G) systems or new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th generation mobile communication systems, satellite communication systems, and so on.

[0039] The terminal device in this application embodiment can 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 this application embodiment can be 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 connectivity, vehicle-mounted device, etc. The terminal devices in the embodiments of this application can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes, etc. Optionally, the UE can act as a base station. For example, the UE can act as a scheduling entity, providing sidelink signals between UEs in V2X or D2D, etc. For example, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through a base station.

[0040] The network device in this application embodiment can be a device for communicating with a terminal device. This network device can also be called an access network device or a wireless access network device, such as a base station. In this application embodiment, the network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master MeNB, auxiliary SeNB, multi-mode 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, micro base station, relay node, donor node, or similar entities, or combinations thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. Base stations can also be mobile switching centers, devices that perform base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, network-side devices in 6G networks, and devices that perform base station functions in future communication systems. Base stations can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0041] 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 depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0042] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0043] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0044] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform).

[0045] Side-to-side communication under different network coverage conditions

[0046] Sidelink communication refers to communication technologies based on sidelinks. Examples of sidelink communication include device-to-device (D2D) and vehicle-to-everything (V2X) communication. In traditional cellular systems, data transmission occurs between terminal devices and network devices, while sidelink communication supports direct data transmission between terminal devices. Compared to traditional cellular communication, direct data transmission between terminal devices offers higher spectral efficiency and lower latency. For example, V2X systems utilize sidelink communication technology.

[0047] In side-by-side communication, depending on the network coverage of the terminal device, side-by-side communication can be divided into side-by-side communication within network coverage, side-by-side communication with partial network coverage, and side-by-side communication outside network coverage.

[0048] Figure 2 This is an example diagram illustrating a scenario of lateral communication within network coverage. Figure 2 In the scenario shown, both terminal devices 120a are within the coverage area of ​​network device 110. Therefore, both terminal devices 120a can receive configuration signaling from network device 110 (configuration signaling in this application can also be replaced by configuration information), and determine the side-link configuration based on the configuration signaling from network device 110. After both terminal devices 120a have performed side-link configuration, side-link communication can be performed on the side-link link.

[0049] Figure 3 This is an example diagram illustrating a scenario involving side-by-side communication within partial network coverage. Figure 3In the scenario shown, terminal device 120a and terminal device 120b engage in sidelink communication. Terminal device 120a is within the coverage area of ​​network device 110, therefore it can receive configuration signaling from network device 110 and determine its sidelink configuration based on this signaling. Terminal device 120b is outside the network coverage area and cannot receive configuration signaling from network device 110. In this case, terminal device 120b can determine its sidelink configuration based on pre-configuration information and / or information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a, which is within the network coverage area. After both terminal devices 120a and 120b have performed sidelink configuration, sidelink communication can then commence on the sidelink link.

[0050] Figure 4 This is an example diagram illustrating a scenario of side-way communication outside network coverage. Figure 4 In the scenario shown, both terminal devices 120b are located outside the network coverage area. In this case, both terminal devices 120b can determine their side-link configuration based on pre-configuration information. After both terminal devices 120b have performed their side-link configuration, side-link communication can be performed on the side-link link.

[0051] Side-by-side communication based on the central control node

[0052] Figure 5 This diagram illustrates a scenario for side-by-side communication based on a central control node. In this scenario, multiple terminal devices can form a communication group, and this group includes a central control node. The central control node can be one of the terminal devices within the communication group (e.g., ...). Figure 5 The terminal device 1 in the central control node can also be called the clusterhead (CH) terminal device. The central control node can be responsible for performing one or more of the following functions: establishing a communication group, joining and leaving a communication group, coordinating resources within the communication group, allocating side-transmission resources to other terminal devices, receiving side-transmission feedback information from other terminal devices, and coordinating resources with other communication groups.

[0053] Data transmission method of side-by-side communication

[0054] Some lateral communication systems (such as Long Term Evolution Vehicle to Everything (LTE-V2X)) support broadcast-based data transmission (hereinafter referred to as broadcast transmission). For broadcast transmission, the receiving terminal can be any terminal device surrounding the sending terminal. Figure 6 For example, terminal device 1 is the sending terminal, and the corresponding receiving terminal is any terminal device around terminal device 1, such as... Figure 6 Terminal devices 2-6 in the middle.

[0055] In addition to broadcast transmission, some communication systems also support unicast-based data transmission (hereinafter referred to as unicast transmission) and / or multicast-based data transmission (hereinafter referred to as multicast transmission). For example, the new radio vehicle to everything (NR-V2X) aims to support autonomous driving. Autonomous driving places higher demands on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, wider coverage, and more flexible resource allocation. Therefore, to improve the performance of data interaction between vehicles, NR-V2X introduces unicast and multicast transmission.

[0056] For unicast transmission, the receiving terminal typically consists of only one terminal device. Figure 7 For example, unicast transmission occurs between terminal device 1 and terminal device 2. Terminal device 1 can be the sending terminal and terminal device 2 can be the receiving terminal, or terminal device 1 can be the receiving terminal and terminal device 2 can be the sending terminal.

[0057] For multicast transmission, the receiving terminal can be a terminal device within a communication group, or it can be a terminal device located within a certain transmission distance. Figure 8 For example, terminal device 1, terminal device 2, terminal device 3, and terminal device 4 constitute a communication group. If terminal device 1 sends data, then the other terminal devices in the group (terminal devices 2 to 4) can all be receiving terminals.

[0058] NR-V2X time slot structure

[0059] NR-V2X systems have lower latency than LTE-V2X systems; therefore, the multiplexing methods for the Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Shared Channel (PSSCH) in NR-V2X systems have been redesigned compared to LTE-V2X systems. NR-V2X time-domain resource allocation is done at the time slot level. Within a time slot, the first Orthogonal Frequency Division Multiplexing (OFDM) symbol is fixed for Automatic Gain Control (AGC). On the AGC symbol, the UE can copy the information transmitted on the second symbol. The last symbol of the time slot is reserved for transmit / receive transition, allowing the UE to switch from transmit (or receive) state to receive (or transmit) state.

[0060] In NR-V2X systems, the PSSCH and its associated PSCCH are transmitted in the same time slot. Except for the AGC symbol, the PSCCH can occupy 2 or 3 OFDM symbols, and the time domain position of the PSCCH can start from the second time domain symbol in the time slot that can be used for sideline transmission (the first time domain symbol is the AGC symbol).

[0061] The number of PRBs occupied by a PSCCH in the frequency domain is configurable. For example, a PSCCH can occupy {10, 12, 15, 20, 25} physical resource blocks (PRBs) in the frequency domain. In the frequency domain, the number of PRBs occupied by a PSCCH is within a sub-band of a PSSCH. If the number of PRBs occupied by a PSCCH is less than the size of a sub-channel of a PSSCH, or if the frequency domain resources of a PSSCH include multiple sub-channels, then the PSCCH can be frequency-division multiplexed with the PSSCH on the OFDM symbol where the PSCCH resides.

[0062] In NR-V2X systems, parameters sl-startSLsymbols and sl-lengthSLsymbols This can be used to configure the start and length of time-domain symbols (abbreviated as symbols) used for sideline transmission within a time slot. (The parameter is used to configure the start and length of the symbols.) sl- startSLsymbols and sl-lengthSLsymbols The last symbol in a configured time slot used for sideline transmission is used as the guard period (GP), and PSSCH and PSCCH can only use the remaining time-domain symbols.

[0063] In some embodiments, in NR-V2X, in addition to PSCCH and PSSCH, a physical sidelink feedback channel (PSFCH) may also exist in a sidelink time slot. If PSFCH transmission resources are configured in a time slot, PSSCH and PSCCH cannot occupy symbols used for PSFCH transmission, as well as the AGC and GP symbols preceding that symbol.

[0064] Figure 9 An example diagram of the time slot structure for some side-following communication systems (e.g., NR-V2X systems) is shown. Figure 9 As shown, the network configuration parameters sl-StartSymbol =3, sl-LengthSymbols =11, meaning that 11 symbols starting from symbol index 3 in a time slot are available for sideline transmission. This time slot contains PSFCH transmission resources, which occupy symbols 11 and 12. Symbol 11 serves as the AGC symbol for the PSFCH, while symbols 10 and 13 are used as GP symbols. Therefore, symbols 3 to 9 are available for PSSCH transmission. The PSCCH occupies three time-domain symbols, specifically symbols 3, 4, and 5. Symbol 3 is typically used as the AGC symbol.

[0065] PSSCH can be used to carry second-order sidelink control information (SCI) and sidelink shared channel (SL-SCH). Second-order SCI can include different SCI formats. For example, 3GPP R16 defines two second-order SCI formats: SCI format 2-A and SCI format 2-B. SCI format 2-B is suitable for multicast communication methods that use distance information for hybrid automatic repeat request (HARQ) feedback. SCI format 2-A is suitable for other scenarios, such as unicast, multicast, and broadcast communication methods that do not require sidelink HARQ feedback, unicast communication methods that require sidelink HARQ feedback, and multicast communication methods that require ACK or NACK feedback. 3GPP R17 introduced an additional second-order SCI format, SCI format 2-C, used to indicate reference resource sets and trigger signaling in specific situations.

[0066] Figure 10 An example diagram of the structure of a second-order SCI in a time slot is shown. Figure 10As shown, the modulation symbols of the second-order SCI begin mapping from the symbol containing the first PSSCH modulation / demodulation reference signal, using a frequency-domain-first, time-domain-later approach. On this symbol, they are multiplexed with the resource element (RE) of the demodulation reference signal (DMRS) through interleaving. Furthermore, the modulation symbols of the second-order SCI cannot be mapped to the RE containing the phase tracking reference signal (PT-RS).

[0067] In side-channel communication systems, whether the UE autonomously selects resources or determines transmission resources based on network-based side-channel resource scheduling, different UEs may transmit PSCCHs on the same time-frequency resources. To ensure that the receiver can detect at least one PSCCH in the event of PSCCH resource conflicts, LTE-V2X employs a PSCCH DMRS randomization design. Specifically, when transmitting a PSCCH, the UE can randomly select a value from {0, 3, 6, 9} as the cyclic shift for the DMRS. If multiple UEs transmit PSCCHs on the same time-frequency resources using different cyclic shifts, the receiving UE can still detect at least one PSCCH through orthogonal DMRSs. For the same purpose, NR-V2X introduces three PSCCH DMRS frequency domain orthogonal covering codes (OCCs) for the transmitting UE to randomly select, as shown in Table 1. The i-th bit of the OCC mask is applied to the i-th DMRS RE within the resource block (RB), thereby achieving the effect of distinguishing different UEs.

[0068] Table 1

[0069]

[0070] In some side-channel communication systems (such as NR-V2X systems), the DMRS of PSSCH borrows from the design in the NR Uu interface, employing 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. Table 2 shows the available DMRS patterns and the position of each DMRS symbol within a given number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols. Figure 11 The diagram shows the time-domain location of four DMRS symbols in a time slot when the PSSCH has 13 symbols.

[0071] Table 2

[0072]

[0073] In some embodiments, if multiple time-domain DMRS patterns are configured within the resource pool, the specific time-domain DMRS pattern to be used can be selected by the transmitting UE and indicated in the first-order SCI. This design allows high-speed moving UEs to select high-density DMRS patterns, thereby ensuring the accuracy of channel estimation; while for low-speed moving UEs, low-density DMRS patterns can be used, thereby improving spectral efficiency.

[0074] The generation method of PSSCH DMRS sequences is almost identical to that of PSCCH DMRS sequences; the only difference lies in the pseudo-random sequence. c ( m Initialization formula middle, , For scheduling the PSSCH of the PSCCH i Cyclic redundancy check (CRC) L For example, the number of bits for PSCCH CRC. L =24.

[0075] In NR communication systems, the PDSCH and PUSCH support two frequency domain DMRS patterns: DMRS frequency domain type 1 and DMRS frequency domain type 2. For each frequency domain type, there are two different types: single DMRS symbols and dual DMRS symbols. Single-symbol DMRS frequency domain type 1 supports 4 DMRS ports, while single-symbol DMRS frequency domain type 2 can support 6 DMRS ports. In the dual DMRS symbol case, the number of supported ports is doubled. However, in side-channel communication systems (such as NR-V2X), since the PSSCH may only need to support a maximum of two DMRS ports, it is possible to support only single-symbol DMRS frequency domain type 1. Figure 12 This is an example diagram of a single-symbol DMRS frequency domain type 1.

[0076] Transmission block size (TBS) of the side link

[0077] The PSSCH adopts the TBS determination mechanism from the Physical Downlink Shared Channel (PDSCH) and Physical Uplink Shared Channel (PUSCH) in NR. Specifically, the TBS is determined based on a reference value for the number of REs used for the PSSCH within the PSSCH time slot, thus ensuring the actual bit rate is as close as possible to the target bit rate. It's important to note that using a reference value for the number of REs, rather than the actual number, is to ensure that the number of REs used to determine the TBS remains constant during PSSCH retransmissions, resulting in identical determined TBSs. To achieve this, the reference value for the number of REs used by the PSSCH during the TBS determination process is used. Determined according to formula (0-1):

[0078]

[0079] in This represents the number of PRBs occupied by PSSCH. This refers to the number of REs used by the first-order SCI (including the REs used by the DMRS of PSCCH). This refers to the number of REs occupied by the second-order SCI. The number of reference REs available for PSSCH within a PRB is determined by formula (0-2):

[0080]

[0081] in:

[0082] , representing the number of subcarriers within a PRB;

[0083] This indicates the number of symbols available for sidetracking within a time slot, excluding the last GP symbol and the first symbol used for AGC.

[0084] 0 or 3, the specific value is indicated by the "PSFCH symbol count" field in the first-order SCI, which is a reference value for the number of symbols occupied by PSFCH.

[0085] The value is configured by the RRC layer parameters and is used as a reference value to represent the number of REs occupied by PT-RS and CSI-RS.

[0086] This represents the average number of DMRS REs in a time slot, which is related to the allowed DMRS patterns in the resource pool, as shown in Table 3.

[0087] Table 3

[0088]

[0089] Second-tier SCI

[0090] NR-V2X supports a two-stage SCI design. The first-stage SCI carries information related to resource sensing, including the time and frequency domain resources of the scheduled PSSCH, and also indicates the bit rate, format, and other information of the second-stage SCI. The second-stage SCI provides other information required for PSSCH decoding.

[0091] The second-order SCI has a 24-bit cyclic redundancy check (CRC) length, uses Polar coding, and is fixed to QPSK modulation. It shares the same transmission port as the data portion of the PSSCH, allowing demodulation using the PSSCH demodulation reference signal. However, unlike the PSSCH data portion, when the PSSCH uses dual-stream transmission, the second-order SCI transmits identical modulation symbols on both streams. This design ensures the second-order SCI's reception performance in highly correlated channels. The code rate of the second-order SCI can be dynamically adjusted within a certain range. The specific code rate is determined by the indicator value of the "Second-order SCI Code Rate Offset" field in the first-order SCI and the code rate corresponding to the MCS index indicated by the "MCS" field. Therefore, even after the code rate changes, the receiver does not need to perform blind detection on the second-order SCI. However, after determining the code rate of the second-order SCI using the first-order SCI, the receiver also needs to determine the number of REs occupied by the second-order SCI for decoding. The number of REs occupied by the second-order SCI... Determined by formula 0-3:

[0092]

[0093] in:

[0094] The number of bits in the second-order SCI information is determined by the format of the second-order SCI.

[0095] This indicates the CRC length of the second-order SCI, which is 24 bits.

[0096] For the bitrate offset of the second-order SCI, within a resource pool There are four selectable values, with a minimum of 1.125 and a maximum of 20. These four selectable values ​​are configured by RRC signaling. In a single transmission... The value is selected by the sending terminal and indicated by the "Second-order SCI rate offset" field in SCI format 1-A. Since the actual number of REs occupied by the second-order SCI is used when determining the TB size carried by the PSSCH, the rate used by the second-order SCI cannot be changed during a PSSCH retransmission process to ensure that the TB size determined by the receiving end is the same.

[0097] , which is the modulation order of the second-order SCI.

[0098] This refers to the bitrate corresponding to the MCS index indicated by the "MCS" field in SCI format 1-A, i.e., the bitrate used in the PSSCH data portion.

[0099] , indicating the first The number of REs available for mapping second-order SCI on each OFDM symbol. This indicates the number of REs within the transmit bandwidth of the PSSCH. For the first The number of REs used for PSCCH on each OFDM symbol.

[0100] ,and ,in:

[0101] Determined by the time slot structure of the sidelink, it represents the number of OFDM symbols that can be used for sidelinking in the current time slot, excluding the first AGC symbol and the last GP symbol.

[0102] The number of symbols used for PSFCH is indicated in the "PSFCH symbol count" field of SCI format 1-A.

[0103] The value range is 0~11, which represents the number of remaining REs in the PRB where the last second-order SCI modulation symbol is located. This parameter is used to ensure that the resources occupied by the second-order SCI are an integer number of PRBs.

[0104] RRC parameters sl-Scaling Maximum spectral efficiency of the configured / pre-configured second-order SCI.

[0105] Since a single PSSCH can be transmitted a maximum of 32 times in NR-V2X, if a PSFCH resource exists in the resource pool and its configuration period is 2 or 4, the available OFDM symbols within different time slots of a single PSSCH transmission may vary. This is calculated based on the actual number of OFDM symbols within a time slot. The number of symbols available for PSSCH transmission within a time slot may vary, leading to... Different, and Changes in this will cause changes in the size of the Transport Block Size (TBS) carried by the PSSCH. To ensure that the Transport Block Size (TBS) remains constant across multiple PSSCH transmissions, the calculation... The actual number of PSFCH symbols was not used at that time, and in the calculation At the same time, the number of REs occupied by PSSCH DMRS and PT-RS, which may change during retransmission, are not taken into account.

[0106] As mentioned earlier, the modulation symbols of the second-order SCI begin mapping from the symbol containing the first PSSCH modulation and demodulation reference signal, using a frequency-domain-first, time-domain-later approach. These symbols are then multiplexed with the RE of the DMRS via interleaving. Furthermore, the modulation symbols of the second-order SCI cannot be mapped to the RE of the PT-RS. Figure 10 As shown.

[0107] Downlink-based positioning

[0108] In downlink-based positioning, the parameter configuration for the downlink positioning reference signal (DL PRS) can include four layers, from highest to lowest: the frequency layer, the TRP layer, the PRS resource set, and the PRS resource. The parameter configuration for DL ​​PRS is described in detail below.

[0109] Network devices can provide DL PRS configuration for terminal devices across four positioning frequency layers. The parameter structure for each positioning frequency layer provides the following DL PRS configuration parameters: DL PRS subcarrier spacing; DL PRS cyclic prefix (CP) length; DL PRS frequency domain resource bandwidth; DL PRS resource frequency domain start frequency position; DL PRS frequency domain reference point "Point A"; and DL PRS comb size "Comb-N".

[0110] The frequency domain resource bandwidth of DL PRS can be determined by the number of PRBs allocated to DL PRS. In some cases, the minimum frequency domain resource bandwidth of DL PRS can be 24 PRBs, with a granularity of 4 PRBs. The maximum frequency domain resource bandwidth of DL PRS can be 272 PRBs.

[0111] The frequency domain starting frequency position of the DL PRS resource is used to indicate the index number of the starting PRB in the frequency domain resource allocation of the DL PRS. The index number of the PRB is defined relative to the frequency domain reference point "Point A" of the DL PRS.

[0112] The aforementioned DL PRS configuration parameters corresponding to each positioning frequency layer can be applied to all DL PRS resources contained within that positioning frequency layer. In other words, within a positioning frequency layer, all DL PRS from multiple different TRPs can use the same subcarrier spacing and CP length, the same comb size, be transmitted on the same frequency subband, and occupy the same bandwidth. This design allows terminal devices to simultaneously receive and measure DL PRS from multiple different TRPs on the same frequency point.

[0113] In some scenarios, the parameters of the TRP layer may include an ID parameter used to uniquely identify and locate the TRP, such as the physical cell ID of the TRP, the NR cell global identifier (NCGI) of the TRP, and the absolute radio frequency channel number (ARFCN) of the TRP. Typically, a maximum of two DL PRS resource sets can be configured within each TRP layer.

[0114] For each DL PRS resource set, the configuration parameters of the DL PRS resource set can be applied to all DL PRS resources contained in that DL PRS resource set. The configuration parameters of a DL PRS resource set include one or more of the following parameters: DL PRS resource set identification ID (using "..."). nr-DL-PRS-ResourceSetID The transmission period and time slot offset of DL PRS (indicated by ""). dl-PRS-Periodicity-and-ResourceSetSlotOffset The repetition factor of DL PRS resources (represented by ""). dl-PRS-ResourceRepetitionFactor The interval for repeated transmission of DL PRS resources (represented by ""). dl-PRS-ResourceTimeGap (represented by ""); the muting configuration of DL PRS; and the number of OFDM symbols occupied by DL PRS resources (represented by ""). dl-PRS-NumSymbols "express).

[0115] The aforementioned transmission period and timeslot offset of DL PRS are used to indicate the time-domain transmission behavior of all DL PRS resources in the DL PRS resource set. In some implementations, the minimum configurable DL PRS transmission period is 4 milliseconds, while the maximum configurable DL PRS transmission period is 10240 milliseconds. Currently, DL PRS configuration supports flexible subcarrier spacings including 15 kHz, 30 kHz, 60 kHz, and 120 kHz. The range of configurable DL PRS transmission period values ​​can be the same regardless of the subcarrier spacing. Figure 13 A schematic diagram of transmitting DL PRS resources is shown with a comb tooth size of 2 and RE offsets of 0 and 1 respectively.

[0116] The repetition factor of the aforementioned DL PRS resource indicates the number of times the DL PRS resource is repeatedly transmitted within each DL PRS transmission cycle. Currently, repeated transmissions of the same DL PRS resource can be used by terminal devices to aggregate the DLPRS energy from multiple transmissions, helping to increase the coverage distance of DL PRS and improve positioning accuracy. In the FR2 system, repeated transmissions of DL PRS resources can also be used by terminal devices for receive beam scanning. Terminal devices can use different receive beams to receive repeated transmissions of the same DL PRS resource, thereby finding the optimal TRP transmit beam and terminal device receive beam match. On the other hand, repeated transmissions of DL PRS resources increase DL PRS transmission overhead. Currently, to control transmission overhead, in the 3GPP NR R16 specification, the repetition factor of DL PRS resources takes values ​​of 1, 2, 4, 6, 8, 16, and 32.

[0117] The time interval for repeated transmission of the above-mentioned DL PRS resource is used to indicate the number of time slots between two consecutive repeated transmissions of the same DL PRS resource.

[0118] The aforementioned silent configuration of DL PRS is used to instruct DL PRS not to be transmitted on certain allocated time-frequency resources. Silent configuration can be understood as DL PRS not being transmitted on all allocated time-frequency resources, but intentionally not being transmitted on certain specified time-frequency resources. On the one hand, silent configuration can avoid DL PRS conflicts with other signals (e.g., SSB); on the other hand, silent configuration can avoid interference between signals transmitted by different TRPs. For example, silent configuration can instruct TRPs closer to the terminal device not to transmit DL PRS, while configuring TRPs farther from the terminal device to transmit DL PRS. In this way, the terminal device can receive DL PRS from the farther TRP without being interfered with by the TRP that instructs silence.

[0119] The number of OFDM symbols occupied by the DL PRS resource mentioned above is used to indicate the number of OFDM symbols allocated to a DL PRS resource within a time slot.

[0120] Typically, the DL PRS configuration parameters included in the TRP layer parameters can be applied to all DL PRS resources in the DL PRS resource set corresponding to the TRP layer. Therefore, DL PRS resources belonging to the same DL PRS resource set will send DL PRS with the same transmission period and the same number of repeated transmissions, and the DL PRS will occupy the same number of OFDM symbols.

[0121] In some implementations, for each DL PRS resource, the DL PRS configuration parameters may also include: the DL PRS resource identification ID (using "..."). nr-DL-PRS-ResourceID "" indicates); DL PRS sequence ID (using " dl-PRS-SequenceID (represented by ""); the initial frequency domain resource unit offset of DL PRS (represented by ""). dl-PRS-CombSizeN-AndReOffset The resource slot offset of DL PRS (represented by ""). dl-PRS-ResourceSlotOffset "Indicates); OFDM symbol offset of DL PRS (indicated by " dl- PRS-ResourceSymbolOffset (represented by ""); DL PRS quasi-co-location (QCL) information (represented by ""). dl-PRS-QCL-Info "express).

[0122] The aforementioned starting frequency domain resource cell offset for DL ​​PRS indicates the frequency domain resource cell offset value used for resource mapping on the first allocated OFDM symbol within a time slot. Typically, based on this parameter and the relative offset value defined in TS38.211, the terminal device can determine the frequency domain resource cell offset value used for resource mapping on each OFDM symbol.

[0123] The resource slot offset of the DL PRS mentioned above is used to indicate the slot offset relative to the DL PRS resource set. This parameter can determine the slot location of each DL PRS resource.

[0124] The OFDM symbol offset of the DL PRS mentioned above is used to indicate the time-frequency resource allocation location of the DL PRS resource within a time slot. This parameter can be used to indicate the index number of the starting OFDM symbol within the time slot.

[0125] The QCL information of the DL PRS mentioned above is used to indicate the QCL information of the DL PRS.

[0126] Sidelink over unlicensed spectrum (SL-U)

[0127] When performing sideline transmissions on unlicensed spectrum, sideline transmissions must meet specific regulatory requirements, including minimum occupied channel bandwidth (OCB) and maximum power spectral density (PSD) requirements. Regarding the OCB requirement, when a UE uses a channel for data transmission, the occupied channel bandwidth must be no less than 80% of the channel bandwidth. Regarding the maximum power spectral density requirement, the power transmitted by the UE per 1 MHz cannot exceed 10 dBm. To meet the OCB and PSD regulatory requirements, sideline transmissions on unlicensed spectrum require an interlaced resource block (IRB) structure. An IRB consists of N discrete RBs in the frequency domain, with a total of M IRBs within the frequency band. The m-th IRB includes RBs {m, M+m, 2M+m, 3M+m, ...}.

[0128] Figure 14 A schematic diagram of the structure of interwoven resource blocks is shown. For example... Figure 14 As shown, the system bandwidth includes 20 RBs, including 5 IRBs (i.e., M=5), and each IRB includes 4 RBs (i.e., N=4). The frequency domain spacing between two adjacent RBs belonging to the same IRB is the same, that is, they are 5 RBs apart. The numbers in the boxes in the figure represent the IRB indexes.

[0129] In the SL-U system, if an IRB-based resource allocation granularity is adopted, the PSCCH and PSSCH channels of the SL-U system should be based on the IRB structure. Figure 15 An example diagram of the frame structure of the SL-U system is shown, in which, Figure 15 The example frame structure diagram is an example of a frame structure that includes only PSCCH and PSSCH in a time slot, but not PSFCH. For example... Figure 15 As shown, the bandwidth includes 20 RBs, configured with 5 IRB resources, i.e., M=5. Each IRB resource includes 4 RBs, and the numbers in the boxes represent the IRB indices. Figure 15 In the system configuration, the PSSCH occupies one IRB resource and two OFDM symbols in the time domain. The PSSCH is granular at the IRB level, with the first symbol in the time slot being the AGC symbol and the last symbol being the GP symbol. Figure 15 In the diagram, PSSCH 1 occupies IRB#0 and IRB#1, and its corresponding PSCCH 1 occupies IRB#0. PSSCH 2 occupies IRB#2, and its corresponding PSCCH 2 also occupies IRB#2. It should be noted that, for simplicity... Figure 15 The resources occupied by the second-order SCI, as well as the resources occupied by PSCCH DMRS and PSSCH DMRS, are not shown in the figure.

[0130] On unlicensed spectrum, UEs can access the channel via Listen Before Talk (LBT). LBT is granular in the frequency domain, with each 20 MHz segment considered a Base Regulator (RB) set. A carrier can include multiple RB sets, with guard intervals between them, such as... Figure 16 As shown.

[0131] On unlicensed spectrum, the UE needs to perform a Level Bypass (LBT) before it can access the channel. However, the time it takes for the UE to complete the LBT is uncertain. In some implementations, if the UE is restricted to starting transmission from the beginning of a single time slot, it may miss its transmission opportunity because it has not completed the LBT before then. Therefore, SL-U considers adding a transmission starting point within a time slot, i.e., multi-start transmission. For example, the additional starting point could be the 3rd or 4th OFDM symbol within the time slot.

[0132] Lateral-link-based positioning

[0133] In 3GPP Release 17, the 3GPP RAN conducted research on sidelink-based positioning, including studies on "NR Positioning Enhancement" and "Scenarios and Requirements for In-Coverage, Partial-Coverage, and Out-of-Coverage NR Positioning Use Cases." The latter focused on V2X and public safety use cases. Furthermore, some organizations (such as the 3GPP SA1 working group) have also defined requirements for "ranging-based services" and positioning accuracy requirements for IoT use in out-of-coverage scenarios. 3GPP needs to research and develop sidelink-based positioning solutions to support the use cases, scenarios, and requirements identified in these activities.

[0134] To improve positioning accuracy, especially for UEs located outside cellular network coverage, 3GPP completed a feasibility and performance study of positioning technology based on lateral positioning reference signals in the early stages of Release 18. The next step is to standardize lateral positioning (including ranging / direction finding) solutions in NR systems. The standardization work for lateral positioning solutions mainly includes the following aspects.

[0135] Standardization Work 1: Standardization of the sidelink positioning reference signal (SL PRS). SL PRS can use a comb-based frequency domain structure (excluding full RE mapping modes) and a sequence format based on pseudo-random sequences. SL PRS can be designed using existing DL-PRS sequences as a starting point, supporting a maximum SL PRS bandwidth of 100MHz in FR1.

[0136] Standardization Work 2: Standardize measurements used for lateral positioning. For example, standardize measurements used to support SL RTT, SL-AOA, and SL-TDOA positioning methods.

[0137] Standardization Task 3: Standardize the SL PRS resource allocation scheme. For example, the SL PRS resource allocation scheme includes Scheme 1 and Scheme 2, where Scheme 1 corresponds to network-allocated SL PRS resources, and Scheme 2 corresponds to UE-selected SL PRS resources. In some implementations, the system supports SL PRS sharing a resource pool with Rel-16 / 17 / 18 side-channel communication and a dedicated SL PRS resource pool. In some implementations, for Scheme 2, it is necessary to study and standardize one or more of the following: channel-sensing-based resource selection, random resource selection, congestion control, and UE-coordinated resource selection.

[0138] Standardization work 4: Standardize the open-loop power control mechanism for SL PRS transmission, etc.

[0139] Some communication systems (such as NR systems) introduce lateral link-based positioning to enhance positioning technology. Determining the resources of reference signals, such as SL PRS, used for lateral link positioning is a problem that needs to be solved.

[0140] To address the aforementioned issues, this application provides a method for wireless communication. In this application embodiment, the terminal device can transmit a reference signal (i.e., a first reference signal) for lateral positioning during the time slots for transmitting and receiving other lateral information, thereby achieving lateral positioning.

[0141] This application does not limit the application scenarios of this technical solution. In some embodiments, the technical solution of this application can be applied to licensed spectrum scenarios. In some embodiments, the technical solution of this application can be applied to unlicensed spectrum scenarios.

[0142] The following is combined with Figure 17 This application introduces a method for wireless communication provided by an embodiment. Figure 17 This is a flowchart illustrating a method for wireless communication provided in an embodiment of this application. Figure 17 The method shown can be executed by a terminal device. This application does not specifically limit the terminal device; the terminal device can be any device related to lateral positioning.

[0143] Figure 17 The method shown may include step S1710.

[0144] In step S1710, the terminal device transmits or receives a first PSSCH in the first time slot. The first time slot is also used to transmit a first reference signal, which is used for lateral positioning.

[0145] In some embodiments, the first time slot may include resources in a shared resource pool between side-link communications. The shared resource pool between side-link communications can be understood as including PSSCH resources and resources for transmitting other side-link information besides PSSCH (such as signals for side-link positioning). For example, the resource pool may include SL PRS resources and PSSCH resources, etc.

[0146] In some embodiments, the first PSSCH described above can be any of the physical side-link shared channels mentioned above. For example, the first PSSCH can carry side-link data and / or second-order SCI.

[0147] In some embodiments, the first reference signal may be, for example, the SLPRS mentioned above. In other embodiments, the first reference signal may also be other signals used for lateral positioning in the communication system in the future.

[0148] In this embodiment of the application, the terminal device can transmit a reference signal (i.e., a first reference signal) for lateral positioning in the time slot for transmitting and receiving the first PSSCH. In other words, the first reference signal and the first PSSCH share a resource pool to achieve lateral positioning.

[0149] When the first reference signal shares a resource pool with the side-by-side communication, the first reference signal may be transmitted with different OFDM symbols in the same time slot (i.e., the first time slot) as the first PSSCH. Compared to the first time slot not transmitting the first reference signal, or the first time slot not having resources for transmitting the first reference signal, the number of OFDM symbols available for the first PSSCH to transmit in the first time slot is reduced.

[0150] To address the issue of determining the TBS in the first time slot under the aforementioned conditions, the TBS of the first PSSCH can be determined based on a first parameter, which is associated with a first reference signal. In some embodiments, the first parameter can be associated with the number of OFDM symbols occupied by the first reference signal. In other embodiments, the first parameter can be associated with a reference value for the number of OFDM symbols, which is associated with the first reference signal.

[0151] The following sections will describe the two methods (i.e., Example 1 and Example 2) for determining the TBS of the first PSSCH based on the first parameter.

[0152] Example 1

[0153] As mentioned earlier, the first parameter can be associated with the number of OFDM symbols occupied by the first reference signal. For example, the first parameter can be the number of OFDM symbols occupied by the first reference signal. Alternatively, the first parameter can be determined based on the number of OFDM symbols occupied by the first reference signal.

[0154] In some embodiments, the first parameter may be indicated based on first information, or in other words, the first information may indicate the first parameter. The first information may be carried in a second-order SCI associated with the first PSSCH. In some communication systems, SCI format 2-D has been introduced to support lateral positioning; therefore, the format of the second-order SCI mentioned here may be, for example, SCI format 2-D.

[0155] The first information can directly or indirectly indicate the first parameter. For example, the first information can contain the first parameter. Alternatively, the first information can indicate the first parameter through a configuration index or identifier.

[0156] To ensure the flexibility of TB transmission, the same TB does not always need to be transmitted in the same time slot as the first reference signal in N transmissions. For example, only the TB and the first reference signal are transmitted in the same time slot in M ​​transmissions, and the TB is transmitted separately in the other NM transmissions, that is, it is not transmitted together with the first reference signal, where M≤N.

[0157] In other words, during multiple transmissions of the same TB (including initial transmission and retransmission), the TB may not be transmitted with the first reference signal in some time slots, while it may be transmitted with the first reference signal in other time slots. In this case, if the size of the PSSCH TBS is determined according to the number of OFDM symbols actually occupied by the first reference signal, the size of the TB determined in different transmission processes may be different.

[0158] Therefore, the TBS of the second PSSCH can be the same as that of the first PSSCH to enable energy aggregation of multiple transmitted TBSs. Specifically, the TBS transmitted by the second PSSCH and the first PSSCH are the same. The second PSSCH mentioned here does not transmit the reference signal used for lateral positioning; that is, the second PSSCH can be transmitted independently of the aforementioned TBSs, and is not transmitted along with the first reference signal.

[0159] In some embodiments, the SCI format of the second-order SCI associated with the second PSSCH can be SCI format 2-D. For example, the number of OFDM symbols occupied by the first reference signal in the second PSSCH can be indicated by information (such as third information) carried in the second-order SCI associated with the second PSSCH, and the third information indicates that the number of OFDM symbols occupied by the first reference signal in the second PSSCH is 0.

[0160] However, in this case, if the number of OFDM symbols occupied by the first reference signal in the second-order SCI is 0, the PSSCH associated with the second-order SCI may be the aforementioned second PSSCH, or it may be another PSSCH other than the aforementioned second PSSCH.

[0161] Therefore, in some embodiments, the second-order SCI associated with the PSSCH may contain second information, which can be used to indicate whether the PSSCH is the aforementioned second PSSCH, or in other words, the TBS of the PSSCH can be determined based on the second information. For example, if the value of the second information is the first value, then the PSSCH is the aforementioned second PSSCH, that is, the TBS of the PSSCH is the same as the TBS of the first PSSCH. Alternatively, if the value of the second information is the second value, then the PSSCH is not the aforementioned second PSSCH, and the TBS of the PSSCH can be determined based on a reference value of the number of REs occupied by the PSSCH, that is, the TBS of the PSSCH can be determined based on the formula (0-1) mentioned above.

[0162] Alternatively, the second-order SCI associated with the second PSSCH may contain second information, which can be used to determine the TBS of the second PSSCH. For example, if the value of the second information is a first value, then the second information indicates that the TBS of the second PSSCH is the same as the TBS of the first PSSCH; and / or if the value of the second information is a second value, then the second information indicates that the TBS of the second PSSCH is determined based on a reference value of the number of REs occupied by the second PSSCH, that is, the TBS of the second PSSCH can be determined based on the formula (0-1) mentioned above.

[0163] As an example, the second information can be a specific bit field of the second-order SCI, such as 1 bit. When the value of this bit field is a specific value (i.e., the first value, such as 1), it indicates that the PSSCH associated with the second-order SCI is the second PSSCH, and the TBS of this PSSCH is the same as that of the first PSSCH. When the bit field is not a specific value (i.e., the second value), the PSSCH associated with the second-order SCI is not the second PSSCH, and the PSSCH is determined based on the reference value of its occupied RE number, that is, based on the formula (0-1) mentioned above. The size of the bit field and the specific value mentioned here are only given as examples. For example, the specific value mentioned here can also be 0, and this application does not limit it.

[0164] In other embodiments, the SCI format of the second-order SCI associated with the PSSCH not used for transmitting reference signals for lateral positioning can be SCI format 2-A, SCI format 2-B, and SCI format 2-C. Similarly, the PSSCH associated with this second-order SCI may be the aforementioned second PSSCH, or it may be a PSSCH other than the aforementioned second PSSCH.

[0165] Therefore, in some embodiments, if another terminal device receives a PSSCH associated with multiple second-order SCIs for transmitting the same TB, and at least one of the multiple second-order SCIs has an SCI format of 2-D, then the TBS of the PSSCHs associated with the multiple second-order SCIs is the same. For example, if another terminal device receives a second-order SCI associated with a first PSSCH and a second-order SCI associated with a second PSSCH, and at least one of the two second-order SCIs has an SCI format of 2-D, then the TBS of the first PSSCH is the same as the TBS of the second PSSCH. The other terminal device mentioned here is a terminal device that performs side-by-side communication with the terminal device in the embodiments of this application.

[0166] There are several ways to determine whether multiple PSSCHs are used to transmit the same TB. In other words, PSSCHs transmitting the same TB can satisfy one or more conditions. For example, the first and second PSSCHs mentioned earlier can satisfy one or more of the following: the source identifier indicated by the second-order SCI associated with the second PSSCH is the same as the source identifier indicated by the second-order SCI associated with the first PSSCH; the destination identifier indicated by the second-order SCI associated with the second PSSCH is the same as the destination identifier indicated by the second-order SCI associated with the first PSSCH; the HARQ process number indicated by the second-order SCI associated with the second PSSCH is the same as the HARQ process number indicated by the second-order SCI associated with the first PSSCH; and the new data indicator (NDI) indicated by the second-order SCI associated with the second PSSCH has the same value as the NDI indicated by the second-order SCI associated with the first PSSCH.

[0167] In some embodiments, the first PSSCH can be the PSSCH associated with the initial transmission process of a TB mentioned above. In other embodiments, compared to the second PSSCH, the first PSSCH can be the previous PSSCH received by another terminal device, or in other words, compared to the second PSSCH, the first PSSCH can be the PSSCH most recently received by another terminal device. In this way, when the PSSCH associated with the initial transmission process is lost or cannot be obtained, the TBS of the second PSSCH can be determined based on the most recently received PSSCH.

[0168] In this embodiment of the application, by determining the TBS of the first PSSCH based on a first parameter associated with the number of OFDM symbols actually occupied by the first reference signal, it is helpful to accurately adjust the TBS according to the available resources, thereby helping to improve spectral efficiency.

[0169] Example 2

[0170] As mentioned earlier, the first parameter can be associated with a reference value for the number of OFDM symbols, which here is associated with the first reference signal. For example, the first parameter can be a reference value for the number of OFDM symbols used for the first reference signal; or, the first parameter can be determined based on one or more resources used for transmitting the first reference signal within a time slot, such as the number of OFDM symbols occupied by one or more resources used for transmitting the first reference signal within a time slot. The number of OFDM symbols used for the first reference signal can be the number of OFDM symbols occupied by one or more resources used for transmitting the first reference signal within a time slot.

[0171] In some embodiments, the second-order SCI associated with the first PSSCH may include a first indicator field, which may be used to indicate the first parameter mentioned above.

[0172] In some embodiments, the number of bits occupied by the first indication field may be associated with the number of OFDM symbols used for the first reference signal, such as the number of bits occupied by the first indication field may be determined based on the number of values ​​of the number of OFDM symbols used for the first reference signal.

[0173] As an example, the number of OFDM symbols used for the first reference signal has A possible values ​​(i.e., the number of values ​​is A), and the number of bits occupied by the first indication field is... Where A is a positive integer greater than or equal to 1. That is, the first indication field can include A+1 values, one of which can be used to indicate that the first parameter is 0, and the other A values ​​of the first indication field can each be used to indicate one of the A values ​​of the first parameter for the number of OFDM symbols used for the first reference signal. In this way, the first indication field can be used to indicate multiple cases of the number of OFDM symbols used for the first reference signal, providing flexibility in its application.

[0174] It should be noted that the correspondence between the A+1 values ​​of the first indicator field and the multiple values ​​of the first parameter can be determined according to the usage requirements; the correspondence between the A+1 values ​​of the first indicator field and the multiple values ​​of the first parameter can be pre-configured or dynamically indicated, and this application does not limit either of them.

[0175] In some embodiments, the first indication field may occupy 1 bit, which may be used to indicate that the first parameter is 0 or X; wherein X is a positive integer greater than or equal to 1, and X is associated with the number of OFDM symbols used for the first reference signal.

[0176] For example, X can be the maximum of several possible values ​​for the number of OFDM symbols used for the first reference signal, which helps to avoid resource conflicts between TB and the first reference signal.

[0177] For example, X can be determined based on the average of multiple values ​​of the number of OFDM symbols used for the first reference signal. When the average of the multiple values ​​of the number of OFDM symbols used for the first reference signal is an integer, X can be the average of the multiple values ​​of the number of OFDM symbols used for the first reference signal; otherwise, X can be the value among the multiple values ​​of the number of OFDM symbols used for the first reference signal that is closest to the aforementioned average, or X can be the integer part of the aforementioned average, or the rounded value of the aforementioned average. As an example, if the number of OFDM symbols used for the first reference signal includes 1, 3, and 5, that is, the average of the various values ​​of the number of OFDM symbols used for the first reference signal is 3, then X can be 3; if the number of OFDM symbols used for the first reference signal includes 1, 2, and 5, that is, the average of the various values ​​of the number of OFDM symbols used for the first reference signal is 2.67, then X can be 2 (that is, the integer part of 2.67, or the value closest to 2.67 among the three values ​​of 1, 2, and 5), or X can be 3 (that is, the rounded value of 2.67).

[0178] To simplify the determination of X, for example, X can be the median value among various values ​​of the number of OFDM symbols used for the first reference signal. As an example, if the various values ​​of the number of OFDM symbols used for the first reference signal include 1, 2, and 4, that is, the median value of the various values ​​of the number of OFDM symbols used for the first reference signal is 2, then X can be 2.

[0179] The method described above for determining the first parameter based on the average or median of various values ​​of the number of OFDM symbols used for the first reference signal helps to balance the avoidance of resource conflicts between the TB and the first reference signal, as well as the improvement of spectral efficiency.

[0180] For example, X can be the most frequently used value among various options for the number of OFDM symbols used for the first reference signal. This most frequently used value can be associated with the application scenario of lateral positioning. For instance, in a first scenario, if the most frequently used value among various options for the number of OFDM symbols used for the first reference signal is Y, then in that scenario, the value of X can be Y. This helps reduce the probability of resource conflicts.

[0181] Table 4 shows the correspondence between various values ​​of the OFDM symbol number used for the first reference signal and X.

[0182] Table 4

[0183]

[0184] In some embodiments, the rule for determining X can be pre-configured or dynamically indicated. In other embodiments, the correspondence between various values ​​of the number of OFDM symbols for the first reference signal and X can be pre-configured, as shown in Table 4, or the correspondence between various values ​​of the number of OFDM symbols for the first reference signal and X can be dynamically indicated, as shown in the content of Table 4.

[0185] In some embodiments, the first parameter is indicated by the transmitting device of the first PSSCH to the receiving device of the first PSSCH via higher-layer signaling, which helps to save processing resources of the receiving device. The higher-layer signaling mentioned here may include, for example, sidelink positioning protocol (SLPP) signaling or RRC signaling.

[0186] To simplify the method for determining the first parameter, in some embodiments, the first parameter can be determined based on the value of the number of OFDM symbols used for the first reference signal. For example, if the number of OFDM symbols used for the first reference signal includes one value, then the first parameter can be that value. As another example, if the number of OFDM symbols used for the first reference signal includes multiple values, then the first parameter can be determined based on those multiple values.

[0187] The method for determining the first parameter based on various values ​​of the number of OFDM symbols used for the first reference signal can be one or more of the methods mentioned above for determining X based on various values ​​of the number of OFDM symbols used for the first reference signal. For the sake of brevity, these methods will not be elaborated here. Table 5 shows a correspondence between various values ​​of the number of OFDM symbols used for the first reference signal and the first parameter.

[0188] Table 5

[0189]

[0190] In some embodiments, the method for determining the first parameter based on multiple values ​​of the number of OFDM symbols for the first reference signal may differ from the method for determining X based on multiple values ​​of the number of OFDM symbols for the first reference signal mentioned above.

[0191] In some embodiments, the TBS of the first PSSCH can be determined based on a second parameter, which can be determined based on a first parameter; wherein the second parameter represents a reference value for the number of REs available for PSSCH within a PRB.

[0192] In some embodiments, the second parameter is further determined based on one or more of the following: a third parameter representing the number of subcarriers within a PRB; a fourth parameter representing the number of OFDM symbols available for sideline transmission within a time slot; a fifth parameter representing a reference value for the number of OFDM symbols occupied by the PSFCH; a sixth parameter representing a reference value for the number of REs occupied by the PT-RS and / or CSI-RS; and a seventh parameter representing the average number of DMRS REs in a time slot.

[0193] For example, the second parameter can satisfy the following formula:

[0194]

[0195] in, Indicates the first parameter. Indicates the second parameter. Indicates the third parameter. Indicates the fourth parameter. This represents the fifth parameter. This represents the sixth parameter. This represents the seventh parameter.

[0196] It should be noted that one or more resources used for transmitting the first reference signal within the aforementioned time slot may be configured / pre-configured within a resource pool, or determined by the transmitting and receiving devices through higher-layer signaling (e.g., SLPP layer signaling or RRC layer signaling).

[0197] In this embodiment, the TBS of the first PSSCH is determined based on a reference value of the number of OFDM symbols. The transmitting device of the first PSSCH does not need to dynamically indicate the OFDM symbols occupied by the first reference signal, which helps to simplify the signaling design.

[0198] As mentioned earlier, it is typically necessary to obtain the number of REs occupied by the second-order SCI in order to decode the second-order SCI. It was also mentioned earlier that the first reference signal may be transmitted as different OFDM symbols within the same time slot (i.e., the first time slot) as the first PSSCH. Compared to a first time slot where the first reference signal is not transmitted, or where there are no resources available for transmitting the first reference signal, the number of OFDM symbols available for the first PSSCH transmission in the first time slot is reduced.

[0199] To address the issue of determining the number of REs occupied by the second-order SCI associated with the first PSSCH in this situation, the method provided in this application will be described below in conjunction with Examples 3 to 5.

[0200] Example 3

[0201] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on the number of OFDM symbols used for the first reference signal, wherein the SCI format of the second-order SCI associated with the first PSSCH can be, for example, SCI format 2-D. For example, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot.

[0202] If the number of OFDM symbols contained in one or more resources used for the first reference signal within a time slot has only one value, then the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on that value. If the number of OFDM symbols contained in one or more resources used for the first reference signal within a time slot has multiple different values, then the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on these multiple different values. For example, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on the maximum number of OFDM symbols contained in the resources used for the first reference signal within the time slot (i.e., the maximum value among the multiple different values), which helps to avoid resource conflicts. As another example, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on the average or median value among the multiple values ​​of the number of OFDM symbols contained in the resources used for the first reference signal within the time slot. As an example, the method of determining based on the average or median value among the multiple values ​​can be one or more of the methods described above for determining the first parameter based on the multiple values ​​of the number of OFDM symbols occupied by one or more resources used for transmitting the first reference signal. For example, when the number of OFDM symbols included in the resources used for the first reference signal within the time slot includes multiple values, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on one of the pre-configured, pre-defined, or indicated values ​​among the above multiple values, such as the value of the first parameter in Table 5.

[0203] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, which is determined based on one or more of the following: a value determined according to the number of OFDM symbols contained in one or more resources for the first reference signal within a time slot; a ninth parameter representing the number of OFDM symbols available for sideline transmission within a time slot; and a tenth parameter representing the number of OFDM symbols occupied by the PSSCH.

[0204] For example, the eighth parameter satisfies the following formula:

[0205]

[0206] in, This represents the eighth parameter. This represents the ninth parameter. This represents the tenth parameter. This represents a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot, such as the maximum number of OFDM symbols contained in the resources used for the first reference signal within the time slot, or a value determined based on multiple possible values ​​for the number of OFDM symbols used for the first reference signal.

[0207] It should be noted that the resources used for the first reference signal within the time slot can be configured / pre-configured within the resource pool.

[0208] In this embodiment of the application, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the resources configured / pre-configured in the resource pool for transmitting the first reference signal. This helps to avoid resource conflicts between the OFDM symbols occupied by the second-order SCI and the OFDM symbols occupied by the first reference signal.

[0209] Example 4

[0210] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH may not be determined based on a first scaling factor. The first scaling factor is configured by higher-layer signaling, such as the RRC parameter sl-Scaling, or a pre-configured parameter used to determine the number of REs occupied by the second-order SCI. For example, the first scaling factor can be the maximum spectral efficiency in formula (0-3). .

[0211] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on one or more of the following: an eleventh parameter, representing the number of bits contained in the second-order SCI; a twelfth parameter, representing the CRC length of the second-order SCI; a thirteenth parameter, representing the code rate offset of the second-order SCI; a fourteenth parameter, representing the modulation order of the second-order SCI; a fifteenth parameter, representing the code rate corresponding to the PSSCH; and a sixteenth parameter, representing the remaining REs in the first PRB, where the first PRB is the PRB containing the last modulation symbol of the second-order SCI. As an example, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0212]

[0213] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This represents the eleventh parameter. This represents the twelfth parameter. This represents the thirteenth parameter. This represents the fourteenth parameter. This represents the fifteenth parameter. This represents the sixteenth parameter.

[0214] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, which is associated with a first scaling factor. For example, the first condition includes:

[0215]

[0216] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This indicates the number of remaining REs in the first PRB, which is the PRB containing the last modulation symbol of the second-order SCI. Indicates the first scaling factor. , This represents the number of OFDM symbols available for sideline transmission within a time slot. This indicates the number of OFDM symbols occupied by the PSFCH. Indicates the first The number of REs available for mapping second-order SCI on OFDM symbols. The value range is 0 to For example, the first condition mentioned above can be satisfied by adjusting the value of the fifteenth parameter R.

[0217] In this embodiment, not determining the number of REs occupied by the second-order SCI based on the first scaling factor helps avoid the impact on the number of REs occupied by the second-order SCI when the first PSSCH and the first reference signal are transmitted in the same time slot. For example, when the first condition is met, the determination of the number of REs occupied by the second-order SCI associated with the first PSSCH is independent of whether the first PSSCH and the first reference signal are transmitted in the same time slot, thereby avoiding the impact on the number of REs occupied by the second-order SCI when the first PSSCH and the first reference signal are transmitted in the same time slot.

[0218] Furthermore, the embodiments of this application do not determine the number of REs occupied by the second-order SCI based on the first scaling factor. In other words, the receiving device does not need to determine the format of the second-order SCI to be received in order to determine the number of REs occupied by the second-order SCI. Therefore, in some cases, it is not necessary to add information indicating the 2-D format of the second-order SCI to the first-order SCI, thereby helping to save resources.

[0219] Example 5

[0220] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on a second scaling factor, which is associated with the SCI format 2-D.

[0221] Since the second-order SCI 2-D (i.e., the second-order SCI in SCI format 2-D) is usually transmitted along with the first reference signal, the transmission of the first reference signal will affect the number of REs used by the second-order SCI 2-D. Based on this, the second scaling factor can be a scaling factor used to determine the number of REs used by the second-order SCI 2-D, or the second scaling factor can be a scaling factor not used to determine the number of REs used for other formats of the second-order SCI. For example, the second scaling factor differs from the first scaling factor, which is used to determine the number of REs used by the second-order SCI, and is associated with SCI format 2-A, SCI format 2-B, or SCI format 2-C. In other words, the first scaling factor is a scaling factor used to determine the number of REs used by the second-order SCI 2-A, 2-B, or 2-C.

[0222] The fact that the second-order SCI 2-D signal is transmitted together with the first reference signal affects the number of REs occupied by the second-order SCI 2-D signal. This can include reducing the number of OFDM symbols available for the second-order SCI 2-D signal, or in other words, reducing the number of REs that the second-order SCI 2-D signal can occupy. Therefore, in some embodiments, the second scaling factor can be smaller than the first scaling factor, thereby helping to reduce the number of REs occupied by the second-order SCI 2-D signal.

[0223] In some embodiments, the second scaling factor may be configured or pre-configured, such as through RRC parameters.

[0224] The method for determining the number of REs occupied by the second-order SCI through a second scaling factor in this application embodiment is easy to implement.

[0225] It should be noted that the values ​​and / or meanings of the above-mentioned third, fourth, fifth, sixth, seventh, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth parameters can be the same as the values ​​and / or meanings of the corresponding parameters in the formulas (0-1), (0-2), and (0-3) mentioned above.

[0226] It should be noted that the various embodiments mentioned in this application can be used in combination or individually, and the embodiments of this application are not limited in this respect. For example, the method for determining the TBS of the first PSSCH described above can be used in combination with the method for determining the number of REs occupied by the second-order SCI, or it can be used alone, etc.

[0227] The above text combined Figures 1 to 17 The method embodiments of this application are described in detail below, in conjunction with... Figure 18 and Figure 19 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0228] Figure 18 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application. Figure 18 The terminal device 1800 shown may include a determination module 1810.

[0229] The transceiver module 1810 can be used to send or receive a first PSSCH in a first time slot, wherein the first time slot is also used to transmit a first reference signal, the first reference signal being used for lateral positioning.

[0230] In some embodiments, the TBS of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal.

[0231] In some embodiments, the first parameter is associated with the first reference signal, including: the first parameter being the number of OFDM symbols occupied by the first reference signal; or, the first parameter being determined based on the number of OFDM symbols occupied by the first reference signal.

[0232] In some embodiments, the first parameter is indicated based on first information, which is carried in a second-order SCI associated with the first PSSCH.

[0233] In some embodiments, the format of the second-order SCI is SCI format 2-D.

[0234] In some embodiments, the TBS of the second PSSCH is the same as that of the first PSSCH, wherein the TB transmitted by the second PSSCH and the first PSSCH is the same.

[0235] In some embodiments, the second PSSCH does not transmit reference signals for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

[0236] In some embodiments, the second-order SCI associated with the second PSSCH includes second information used to determine the TBS of the second PSSCH.

[0237] In some embodiments, if the value of the second information is a first value, then the second information indicates that the TBS of the second PSSCH is the same as the TBS of the first PSSCH; and / or if the value of the second information is a second value, then the second information indicates that the TBS of the second PSSCH is determined based on a reference value of the number of REs occupied by the second PSSCH.

[0238] In some embodiments, the second-order SCI associated with the second PSSCH includes third information, which indicates the number of OFDM symbols occupied by the reference signal used for lateral positioning, and the number of OFDM symbols indicated by the third information is 0.

[0239] In some embodiments, the second PSSCH does not transmit reference signals for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-A, SCI format 2-B, or SCI format 2-C.

[0240] In some embodiments, the second PSSCH and the first PSSCH satisfy one or more of the following: the source identifier indicated by the second-order SCI associated with the second PSSCH is the same as the source identifier indicated by the second-order SCI associated with the first PSSCH; the destination identifier indicated by the second-order SCI associated with the second PSSCH is the same as the destination identifier indicated by the second-order SCI associated with the first PSSCH; the HARQ process number indicated by the second-order SCI associated with the second PSSCH is the same as the HARQ process number indicated by the second-order SCI associated with the first PSSCH; and the NDI indicated by the second-order SCI associated with the second PSSCH has the same value as the NDI indicated by the second-order SCI associated with the first PSSCH.

[0241] In some embodiments, the first parameter is associated with the first reference signal, including: the first parameter being a reference value for the number of OFDM symbols used for the first reference signal; or, the first parameter being determined based on one or more resources used for transmitting the first reference signal within a time slot.

[0242] In some embodiments, the second-order SCI associated with the first PSSCH includes a first indication field, which is used to indicate the first parameter.

[0243] In some embodiments, the number of bits occupied by the first indication field is associated with the number of OFDM symbols used for the first reference signal.

[0244] In some embodiments, the number of OFDM symbols used for the first reference signal has A possible values, and the number of bits occupied by the first indication field is... , where A is a positive integer greater than or equal to 1.

[0245] In some embodiments, the first indication field occupies 1 bit, which is used to indicate that the first parameter is 0 or X; wherein X is a positive integer greater than or equal to 1, and X is associated with the number of OFDM symbols used for the first reference signal.

[0246] In some embodiments, the first parameter is indicated by the transmitting device of the first PSSCH to the receiving device of the first PSSCH via higher-layer signaling.

[0247] In some embodiments, the higher-layer signaling includes SLPP signaling or RRC signaling.

[0248] In some embodiments, the TBS of the first PSSCH is determined based on a second parameter, which is determined based on the first parameter; wherein the second parameter represents a reference value for the number of REs available for PSSCH within a PRB.

[0249] In some embodiments, the second parameter is further determined based on one or more of the following: a third parameter representing the number of subcarriers within a PRB; a fourth parameter representing the number of OFDM symbols available for sideline transmission within a time slot; a fifth parameter representing a reference value for the number of OFDM symbols occupied by the PSFCH; a sixth parameter representing a reference value for the number of REs occupied by the PT-RS and / or CSI-RS; and a seventh parameter representing the average number of DMRS REs in a time slot.

[0250] In some embodiments, the second parameter satisfies the following formula:

[0251]

[0252] in, This represents the first parameter. This indicates the second parameter. This refers to the third parameter. This refers to the fourth parameter. This refers to the fifth parameter. This refers to the sixth parameter. This refers to the seventh parameter.

[0253] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the number of OFDM symbols contained in one or more resources within the time slot used for the first reference signal.

[0254] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the maximum number of OFDM symbols contained in the resources used for the first reference signal within the time slot.

[0255] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, which is determined based on one or more of the following: a value determined according to the number of OFDM symbols contained in one or more resources for the first reference signal within a time slot; a ninth parameter representing the number of OFDM symbols available for sideline transmission within a time slot; and a tenth parameter representing the number of OFDM symbols occupied by the PSSCH.

[0256] In some embodiments, the eighth parameter satisfies the following formula:

[0257]

[0258] in, This refers to the eighth parameter. This refers to the ninth parameter. This refers to the tenth parameter. This represents a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot.

[0259] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is not determined based on a first scaling factor, which is a parameter configured by higher-layer signaling to determine the number of REs occupied by the second-order SCI.

[0260] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on one or more of the following: an eleventh parameter, representing the number of bits contained in the second-order SCI; a twelfth parameter, representing the CRC length of the second-order SCI; a thirteenth parameter, representing the code rate offset of the second-order SCI; a fourteenth parameter, representing the modulation order of the second-order SCI; a fifteenth parameter, representing the code rate corresponding to the PSSCH; and a sixteenth parameter, representing the remaining number of REs in the first PRB, wherein the first PRB is the PRB containing the last modulation symbol of the second-order SCI.

[0261] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0262]

[0263] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This refers to the eleventh parameter. This refers to the twelfth parameter. This refers to the thirteenth parameter. This refers to the fourteenth parameter. This refers to the fifteenth parameter. This refers to the sixteenth parameter.

[0264] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, which is associated with the first scaling factor.

[0265] In some embodiments, the first condition includes:

[0266]

[0267] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This indicates the number of remaining REs in the first PRB, which is the PRB containing the last modulation symbol of the second-order SCI. This represents the first scaling factor. , This represents the number of OFDM symbols available for sideline transmission within a time slot. This indicates the number of OFDM symbols occupied by the PSFCH. Indicates the first The number of REs available for mapping second-order SCI on OFDM symbols. The value range is 0 to .

[0268] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on a second scaling factor, which is associated with the SCI format 2-D.

[0269] In some embodiments, the second scaling factor is different from the first scaling factor, the first scaling factor is used to determine the number of REs occupied by the second-order SCI, and the first scaling factor is associated with SCI format 2-A, SCI format 2-B or SCI format 2-C.

[0270] In some embodiments, the second scaling factor is smaller than the first scaling factor.

[0271] In some embodiments, the SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

[0272] In some embodiments, the transceiver module 1810 may be a processor 1910. The terminal device 1800 may also include a transceiver 1930 and a memory 1920, specifically as follows: Figure 19 As shown.

[0273] Figure 19 This is a schematic structural diagram of a communication device according to an embodiment of this application. Figure 19 The dashed lines indicate that the unit or module is optional. The device 1900 can be used to implement the methods described in the above method embodiments. The device 1900 can be a chip or a terminal device.

[0274] Apparatus 1900 may include one or more processors 1910. The processor 1910 may support apparatus 1900 in implementing the methods described in the preceding method embodiments. The processor 1910 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 other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0275] The apparatus 1900 may further include one or more memories 1920. The memories 1920 store a program that can be executed by the processor 1910, causing the processor 1910 to perform the methods described in the preceding method embodiments. The memories 1920 may be independent of the processor 1910 or integrated within the processor 1910.

[0276] The device 1900 may also include a transceiver 1930. The processor 1910 can communicate with other devices or chips via the transceiver 1930. For example, the processor 1910 can send and receive data with other devices or chips via the transceiver 1930.

[0277] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to the terminal device provided in this application, and the program causes a computer to execute the methods performed by the terminal device in various embodiments of this application.

[0278] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device provided in this application embodiment, and the program causes a computer to execute the methods executed by the terminal device in various embodiments of this application.

[0279] This application also provides a computer program. This computer program can be applied to the terminal device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device in various embodiments of this application.

[0280] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0281] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0282] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0283] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0284] In the embodiments of this application, the term "comprising" can refer to direct inclusion or indirect inclusion. Optionally, "comprising" in the embodiments of this application can be replaced with "instructing" or "used to determine". For example, "A includes B" can be replaced with "A instructs B" or "A is used to determine B".

[0285] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0286] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0287] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0288] In the various embodiments of this application, the order of the above-mentioned processes does not imply 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 this application.

[0289] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0290] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0291] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0292] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially 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, all or part of the processes or functions described in the embodiments of this application are generated. 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. 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 wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0293] The embodiments of this application also disclose at least the following solutions:

[0294] 1. A method for wireless communication, comprising:

[0295] The terminal device transmits or receives a first PSSCH in a first time slot, wherein the first time slot is also used to transmit a first reference signal, which is used for lateral positioning.

[0296] 2. According to the method of Scheme 1, wherein the TBS of the first PSSCH is determined based on the first parameter, and the first parameter is associated with the first reference signal.

[0297] 3. The method according to Scheme 2, wherein the first parameter is associated with the first reference signal, including:

[0298] The first parameter is the number of OFDM symbols occupied by the first reference signal; or,

[0299] The first parameter is determined based on the number of OFDM symbols occupied by the first reference signal.

[0300] 4. According to the method of Scheme 3, the first parameter is based on the indication of the first information, and the first information is carried in the second-order SCI associated with the first PSSCH.

[0301] 5. According to the method described in Scheme 4, the format of the second-order SCI is SCI format 2-D.

[0302] 6. The method according to any one of schemes 3 to 5, wherein the TBS of the second PSSCH is the same as the TBS of the first PSSCH, and wherein the TB transmitted by the second PSSCH and the first PSSCH is the same.

[0303] 7. According to the method of Scheme 6, wherein the second PSSCH does not transmit a reference signal for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

[0304] 8. According to the method of Scheme 7, wherein the second-order SCI associated with the second PSSCH contains second information, the second information being used to determine the TBS of the second PSSCH.

[0305] 9. The method according to Scheme 8, characterized in that:

[0306] If the value of the second information is the first value, then the second information indicates that the TBS of the second PSSCH is the same as the TBS of the first PSSCH; and / or

[0307] If the value of the second information is the second value, then the second information indicates that the TBS of the second PSSCH is determined based on a reference value of the number of REs occupied by the second PSSCH.

[0308] 10. The method according to any one of schemes 7 to 9, wherein the second-order SCI associated with the second PSSCH includes third information, the third information being used to indicate the number of OFDM symbols occupied by the reference signal for lateral positioning, and the number of OFDM symbols indicated by the third information is 0.

[0309] 11. According to the method of Scheme 6, wherein the second PSSCH does not transmit a reference signal for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-A, SCI format 2-B or SCI format 2-C.

[0310] 12. The method according to any one of claims 6 to 11, wherein the second PSSCH and the first PSSCH satisfy one or more of the following:

[0311] The source identifier indicated by the second-order SCI associated with the second PSSCH is the same as the source identifier indicated by the second-order SCI associated with the first PSSCH;

[0312] The destination identifier indicated by the second-order SCI associated with the second PSSCH is the same as the destination identifier indicated by the second-order SCI associated with the first PSSCH;

[0313] The HARQ process number indicated by the second-order SCI associated with the second PSSCH is the same as the HARQ process number indicated by the second-order SCI associated with the first PSSCH; and

[0314] The NDI indicated by the second-order SCI associated with the second PSSCH has the same value as the NDI indicated by the second-order SCI associated with the first PSSCH.

[0315] 13. The method according to Scheme 2, wherein the first parameter is associated with the first reference signal, including:

[0316] The first parameter is a reference value for the number of OFDM symbols used for the first reference signal; or,

[0317] The first parameter is determined based on one or more resources used for transmitting the first reference signal within the time slot.

[0318] 14. The method according to Scheme 13, wherein the second-order SCI associated with the first PSSCH includes a first indicator field, the first indicator field being used to indicate the first parameter.

[0319] 15. The method according to Scheme 14, wherein the number of bits occupied by the first indication field is associated with the number of OFDM symbols used for the first reference signal.

[0320] 16. According to the method of scheme 15, the number of OFDM symbols used for the first reference signal has A possible values, and the number of bits occupied by the first indication field is... , where A is a positive integer greater than or equal to 1.

[0321] 17. The method according to Scheme 14, wherein the first indication field occupies 1 bit, the 1 bit being used to indicate that the first parameter is 0 or X; wherein X is a positive integer greater than or equal to 1, and X is associated with the number of OFDM symbols used for the first reference signal.

[0322] 18. According to the method of scheme 13, wherein the first parameter is indicated by the transmitting device of the first PSSCH to the receiving device of the first PSSCH via higher layer signaling.

[0323] 19. The method according to Scheme 18, wherein the higher-layer signaling includes SLPP signaling or RRC signaling.

[0324] 20. The method according to any one of schemes 13 to 19, wherein the TBS of the first PSSCH is determined based on a second parameter, the second parameter being determined based on the first parameter; wherein the second parameter represents a reference value for the number of REs available for PSSCH within a PRB.

[0325] 21. The method according to Scheme 20, wherein the second parameter is further determined based on one or more of the following:

[0326] The third parameter represents the number of subcarriers within a PRB;

[0327] The fourth parameter represents the number of OFDM symbols available for sideline transmission within a time slot;

[0328] The fifth parameter represents a reference value for the number of OFDM symbols occupied by the PSFCH;

[0329] The sixth parameter represents a reference value for the number of REs used by PT-RS and / or CSI-RS; and

[0330] The seventh parameter represents the average number of DMRS REs in a time slot.

[0331] 22. According to the method described in Scheme 21, the second parameter satisfies the following formula:

[0332]

[0333] in, This represents the first parameter. This indicates the second parameter. This refers to the third parameter. This refers to the fourth parameter. This refers to the fifth parameter. This refers to the sixth parameter. This refers to the seventh parameter.

[0334] 23. According to the method of Scheme 1, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the number of OFDM symbols contained in one or more resources for the first reference signal within the time slot.

[0335] 24. According to the method of scheme 23, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the maximum number of OFDM symbols contained in the resources used for the first reference signal within the time slot.

[0336] 25. The method according to scheme 23 or 24, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, which is determined based on one or more of the following:

[0337] The value is determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot;

[0338] The ninth parameter represents the number of OFDM symbols available for sideline transmission within a time slot; and

[0339] The tenth parameter represents the number of OFDM symbols occupied by the PSFCH.

[0340] 26. According to the method described in Scheme 25, the eighth parameter satisfies the following formula:

[0341]

[0342] in, This refers to the eighth parameter. This refers to the ninth parameter. This refers to the tenth parameter. This represents a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot.

[0343] 27. According to the method of Scheme 1, the number of REs occupied by the second-order SCI associated with the first PSSCH is not determined based on the first scaling factor, wherein the first scaling factor is a parameter configured by higher-layer signaling to determine the number of REs occupied by the second-order SCI.

[0344] 28. The method according to scheme 27, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on one or more of the following:

[0345] The eleventh parameter indicates the number of bits contained in the second-order SCI;

[0346] The twelfth parameter represents the CRC length of the second-order SCI;

[0347] The thirteenth parameter represents the bitrate offset of the second-order SCI;

[0348] The fourteenth parameter represents the modulation order of the second-order SCI;

[0349] The fifteenth parameter represents the bitrate corresponding to PSSCH; and

[0350] The sixteenth parameter represents the number of remaining REs in the first PRB, where the first PRB is the PRB containing the last modulation symbol of the second-order SCI.

[0351] 29. The method according to any one of Schemes 28, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0352]

[0353] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This refers to the eleventh parameter. This refers to the twelfth parameter. This refers to the thirteenth parameter. This refers to the fourteenth parameter. This refers to the fifteenth parameter. This refers to the sixteenth parameter.

[0354] 30. The method according to any one of schemes 27 to 29, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, the first condition being associated with the first scaling factor.

[0355] 31. The method according to Scheme 30, wherein the first condition includes:

[0356]

[0357] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This indicates the number of remaining REs in the first PRB, which is the PRB containing the last modulation symbol of the second-order SCI. This represents the first scaling factor. , This represents the number of OFDM symbols available for sideline transmission within a time slot. This indicates the number of OFDM symbols occupied by the PSFCH. Indicates the first The number of REs available for mapping second-order SCI on OFDM symbols. The value range is 0 to .

[0358] 32. According to the method of Scheme 1, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on a second scaling factor, and the second scaling factor is associated with the SCI format 2-D.

[0359] 33. According to the method of scheme 32, the second scaling factor is different from the first scaling factor, the first scaling factor is used to determine the number of REs occupied by the second-order SCI, and the first scaling factor is associated with SCI format 2-A, SCI format 2-B or SCI format 2-C.

[0360] 34. The method according to scheme 33, wherein the second scaling factor is less than the first scaling factor.

[0361] 35. The method according to any one of schemes 23 to 34, wherein the SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

[0362] 36. A terminal device, comprising:

[0363] The transceiver module is used to send or receive a first PSSCH in a first time slot, wherein the first time slot is also used to transmit a first reference signal, the first reference signal being used for lateral positioning.

[0364] 37. The device according to Scheme 36, wherein the TBS of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal.

[0365] 38. The device according to claim 37, wherein the first parameter is associated with the first reference signal, including:

[0366] The first parameter is the number of OFDM symbols occupied by the first reference signal; or,

[0367] The first parameter is determined based on the number of OFDM symbols occupied by the first reference signal.

[0368] 39. The device according to Scheme 38, wherein the first parameter is based on first information indication, and the first information is carried in the second-order SCI associated with the first PSSCH.

[0369] 40. The device according to Scheme 39, wherein the format of the second-order SCI is SCI format 2-D.

[0370] 41. The device according to any one of schemes 38 to 40, wherein the TBS of the second PSSCH is the same as the TBS of the first PSSCH, and wherein the TB transmitted by the second PSSCH and the first PSSCH is the same.

[0371] 42. The device according to Scheme 41, wherein the second PSSCH does not transmit a reference signal for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

[0372] 43. The device according to claim 42, wherein the second-order SCI associated with the second PSSCH includes second information, the second information being used to determine the TBS of the second PSSCH.

[0373] 44. The device according to claim 43, characterized in that:

[0374] If the value of the second information is the first value, then the second information indicates that the TBS of the second PSSCH is the same as the TBS of the first PSSCH; and / or

[0375] If the value of the second information is the second value, then the second information indicates that the TBS of the second PSSCH is determined based on a reference value of the number of REs occupied by the second PSSCH.

[0376] 45. The device according to any one of schemes 42 to 44, wherein the second-order SCI associated with the second PSSCH includes third information, the third information being used to indicate the number of OFDM symbols occupied by the reference signal for lateral positioning, and the number of OFDM symbols indicated by the third information is 0.

[0377] 46. ​​The device according to Scheme 41, wherein the second PSSCH does not transmit a reference signal for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-A, SCI format 2-B or SCI format 2-C.

[0378] 47. The device according to any one of claims 41 to 46, wherein the second PSSCH and the first PSSCH satisfy one or more of the following:

[0379] The source identifier indicated by the second-order SCI associated with the second PSSCH is the same as the source identifier indicated by the second-order SCI associated with the first PSSCH;

[0380] The destination identifier indicated by the second-order SCI associated with the second PSSCH is the same as the destination identifier indicated by the second-order SCI associated with the first PSSCH;

[0381] The HARQ process number indicated by the second-order SCI associated with the second PSSCH is the same as the HARQ process number indicated by the second-order SCI associated with the first PSSCH; and

[0382] The NDI indicated by the second-order SCI associated with the second PSSCH has the same value as the NDI indicated by the second-order SCI associated with the first PSSCH.

[0383] 48. The device according to claim 37, wherein the first parameter is associated with the first reference signal, including:

[0384] The first parameter is a reference value for the number of OFDM symbols used for the first reference signal; or,

[0385] The first parameter is determined based on one or more resources used for transmitting the first reference signal within the time slot.

[0386] 49. The device according to Scheme 48, wherein the second-order SCI associated with the first PSSCH includes a first indication field, the first indication field being used to indicate the first parameter.

[0387] 50. The device according to claim 49, wherein the number of bits occupied by the first indication field is associated with the number of OFDM symbols used for the first reference signal.

[0388] 51. The device according to Scheme 50, wherein the number of OFDM symbols used for the first reference signal has A possible values, and the number of bits occupied by the first indication field is... , where A is a positive integer greater than or equal to 1.

[0389] 52. The device according to Scheme 49, wherein the first indication field occupies 1 bit, the 1 bit being used to indicate that the first parameter is 0 or X; wherein X is a positive integer greater than or equal to 1, and X is associated with the number of OFDM symbols used for the first reference signal.

[0390] 53. The device according to Scheme 48, wherein the first parameter is indicated by the transmitting device of the first PSSCH to the receiving device of the first PSSCH via higher-layer signaling.

[0391] 54. The device according to Scheme 53, wherein the higher-layer signaling includes SLPP signaling or RRC signaling.

[0392] 55. The device according to any one of schemes 48 to 54, wherein the TBS of the first PSSCH is determined based on a second parameter, the second parameter being determined based on the first parameter; wherein the second parameter represents a reference value for the number of REs available for PSSCH within a PRB.

[0393] 56. The device according to claim 55, wherein the second parameter is further determined based on one or more of the following:

[0394] The third parameter represents the number of subcarriers within a PRB;

[0395] The fourth parameter represents the number of OFDM symbols available for sideline transmission within a time slot;

[0396] The fifth parameter represents a reference value for the number of OFDM symbols occupied by the PSFCH;

[0397] The sixth parameter represents a reference value for the number of REs used by PT-RS and / or CSI-RS; and

[0398] The seventh parameter represents the average number of DMRS REs in a time slot.

[0399] 57. The device according to Scheme 56, wherein the second parameter satisfies the following formula:

[0400]

[0401] in, This represents the first parameter. This indicates the second parameter. This refers to the third parameter. This refers to the fourth parameter. This refers to the fifth parameter. This refers to the sixth parameter. This refers to the seventh parameter.

[0402] 58. The device according to Scheme 36, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the number of OFDM symbols contained in one or more resources for the first reference signal within the time slot.

[0403] 59. The device according to Scheme 58, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the maximum number of OFDM symbols contained in the resources used for the first reference signal within the time slot.

[0404] 60. The device according to scheme 58 or 59, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, said eighth parameter being determined based on one or more of the following:

[0405] The value is determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot;

[0406] The ninth parameter represents the number of OFDM symbols available for sideline transmission within a time slot; and

[0407] The tenth parameter represents the number of OFDM symbols occupied by the PSFCH.

[0408] 61. The device according to Scheme 60, wherein the eighth parameter satisfies the following formula:

[0409]

[0410] in, This refers to the eighth parameter. This refers to the ninth parameter. This refers to the tenth parameter. This represents a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal within the time slot.

[0411] 62. The device according to Scheme 36, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is not determined based on a first scaling factor, wherein the first scaling factor is a parameter configured by higher-layer signaling to determine the number of REs occupied by the second-order SCI.

[0412] 63. The device according to claim 62, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on one or more of the following:

[0413] The eleventh parameter indicates the number of bits contained in the second-order SCI;

[0414] The twelfth parameter represents the CRC length of the second-order SCI;

[0415] The thirteenth parameter represents the bitrate offset of the second-order SCI;

[0416] The fourteenth parameter represents the modulation order of the second-order SCI;

[0417] The fifteenth parameter represents the bitrate corresponding to PSSCH; and

[0418] The sixteenth parameter represents the number of remaining REs in the first PRB, where the first PRB is the PRB containing the last modulation symbol of the second-order SCI.

[0419] 64. The device according to any one of Schemes 63, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0420]

[0421] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This refers to the eleventh parameter. This refers to the twelfth parameter. This refers to the thirteenth parameter. This refers to the fourteenth parameter. This refers to the fifteenth parameter. This refers to the sixteenth parameter.

[0422] 65. The device according to any one of schemes 62 to 64, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, the first condition being associated with the first scaling factor.

[0423] 66. The device according to claim 65, wherein the first condition includes:

[0424]

[0425] in, This indicates the number of REs occupied by the second-order SCI associated with the first PSSCH. This indicates the number of remaining REs in the first PRB, which is the PRB containing the last modulation symbol of the second-order SCI. This represents the first scaling factor. , This represents the number of OFDM symbols available for sideline transmission within a time slot. This indicates the number of OFDM symbols occupied by the PSFCH. Indicates the first The number of REs available for mapping second-order SCI on OFDM symbols. The value range is 0 to .

[0426] 67. The device according to Scheme 36, wherein the number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on a second scaling factor, the second scaling factor being associated with the SCI format 2-D.

[0427] 68. The device according to Scheme 67, wherein the second scaling factor is different from the first scaling factor, the first scaling factor is used to determine the number of REs occupied by the second-order SCI, and the first scaling factor is associated with SCI format 2-A, SCI format 2-B or SCI format 2-C.

[0428] 69. The device according to Scheme 68, wherein the second scaling factor is smaller than the first scaling factor.

[0429] 70. The device according to any one of Schemes 58 to 69, wherein the SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

[0430] 71. A terminal device, comprising a memory and a processor, the memory for storing a program, and the processor for calling the program in the memory to cause the terminal device to perform the method as described in any one of claims 1-35.

[0431] 72. An apparatus comprising a processor for recalling a program from a memory to cause the apparatus to perform the method as described in any one of schemes 1-35.

[0432] 73. A chip, comprising a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in any one of claims 1-35.

[0433] 74. A computer-readable storage medium having a program stored thereon that causes a computer to perform the method as described in any one of claims 1-35.

[0434] 75. A computer program product, comprising a program that causes a computer to perform the method as described in any one of claims 1-35.

[0435] 76. A computer program, wherein the computer program causes a computer to perform the method as described in any one of schemes 1-35.

[0436] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for wireless communication, comprising: include: The terminal device transmits or receives a first PSSCH in a first time slot, wherein the first time slot is further used to transmit a first reference signal, the first reference signal being used for lateral positioning. The transport block size (TBS) of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal. The association of the first parameter with the first reference signal includes: the first parameter being a reference value for the number of OFDM symbols used for the first reference signal; or, the first parameter being determined based on one or more resources used to transmit the first reference signal within a time slot. The TBS of the first PSSCH is determined based on a second parameter, which is determined based on the first parameter. The second parameter represents a reference value for the number of resource units (REs) available for PSSCH within a physical resource block (PRB). The second parameter is also determined based on one or more of the following: The third parameter represents the number of subcarriers within a PRB; The fourth parameter represents the number of OFDM symbols available for sideline transmission within a time slot; The fifth parameter represents a reference value for the number of OFDM symbols occupied by the PSFCH; The sixth parameter represents a reference value for the number of REs used by PT-RS and / or CSI-RS; and The seventh parameter represents the average number of DMRS REs in a time slot. Wherein, the second parameter satisfies the following formula: wherein denotes the first parameter, denotes the second parameter, denotes the third parameter, denotes the fourth parameter, denotes the fifth parameter, denotes the sixth parameter, denotes the seventh parameter.

2. The method according to claim 1, characterized in that, The first parameter is associated with the first reference signal and further includes: The first parameter is the number of OFDM symbols occupied by the first reference signal; or, The first parameter is determined based on the number of OFDM symbols occupied by the first reference signal.

3. The method according to claim 2, characterized in that, The first parameter is based on the first information indication, which is carried in the second-order SCI associated with the first PSSCH.

4. The method according to claim 3, characterized in that, The format of the second-order SCI is SCI format 2-D.

5. The method according to any one of claims 2 to 4, characterized in that, The TBS of the second PSSCH is the same as that of the first PSSCH, wherein the TB transmitted by the second PSSCH and the first PSSCH are the same.

6. The method according to claim 5, characterized in that, The second PSSCH does not transmit reference signals for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-A, SCI format 2-B, or SCI format 2-C.

7. A terminal device, characterized in that, include: The transceiver module is configured to transmit or receive a first PSSCH in a first time slot, wherein the first time slot is further configured to transmit a first reference signal, the first reference signal being used for side-line positioning. The transport block size (TBS) of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal. The association of the first parameter with the first reference signal includes: the first parameter being a reference value for the number of OFDM symbols used for the first reference signal; or, the first parameter being determined based on one or more resources used to transmit the first reference signal within a time slot. The TBS of the first PSSCH is determined based on a second parameter, which is determined based on the first parameter. The second parameter represents a reference value for the number of resource units (REs) available for PSSCH within a physical resource block (PRB). The second parameter is also determined based on one or more of the following: The third parameter represents the number of subcarriers within a PRB; The fourth parameter represents the number of OFDM symbols available for sideline transmission within a time slot; The fifth parameter represents a reference value for the number of OFDM symbols occupied by the PSFCH; The sixth parameter represents a reference value for the number of REs used by PT-RS and / or CSI-RS; and The seventh parameter represents the average number of DMRS REs in a time slot. Wherein, the second parameter satisfies the following formula: in, This represents the first parameter. This indicates the second parameter. This refers to the third parameter. This refers to the fourth parameter. This refers to the fifth parameter. This refers to the sixth parameter. This refers to the seventh parameter.

8. The device according to claim 7, characterized in that, The first parameter is associated with the first reference signal and further includes: The first parameter is the number of OFDM symbols occupied by the first reference signal; or, The first parameter is determined based on the number of OFDM symbols occupied by the first reference signal.

9. The device according to claim 8, characterized in that, The first parameter is based on the first information indication, which is carried in the second-order SCI associated with the first PSSCH.

10. The device according to claim 9, characterized in that, The format of the second-order SCI is SCI format 2-D.

11. The device according to any one of claims 8 to 10, characterized in that, The TBS of the second PSSCH is the same as that of the first PSSCH, wherein the TB transmitted by the second PSSCH and the first PSSCH is the same, wherein the second PSSCH does not transmit reference signals for lateral positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-A, SCI format 2-B or SCI format 2-C.

12. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-6.

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