Method and terminal device for wireless communication

Abstract

Provided are a method for wireless communication and a terminal device, the method comprising: a terminal device sending or receiving a first PSSCH in a first time slot, the first time slot being further used for transmitting a first reference signal, the first reference signal being used for sidewalk positioning. In the embodiment of the invention, the terminal equipment can transmit the reference signal (namely the first reference signal) used for sidewalk positioning in the time slot for receiving and transmitting other sidewalk information, that is, the resource of the first reference signal and the resource of other sidewalk information share the resource pool, so that sidewalk positioning is realized.

Description

Method and terminal device for wireless communication Technical Field

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

[0002] Some communication systems, such as new radio (NR) systems, introduce sidelink-based positioning to enhance positioning technology. Determining the resources of reference signals used for sidelink positioning, such as the Sidelink Positioning Reference Signal (SLPRS), is a problem that needs to be solved.

[0003] Summary of the Invention

[0004] The present application provides a method and terminal device for wireless communication. The following introduces various aspects of the present application.

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

[0006] In a second aspect, a terminal device is provided, which includes a transceiver module for sending or receiving a first PSSCH in a first time slot, wherein the first time slot is also used to transmit a first reference signal, and the first reference signal is used for side positioning.

[0007] In a third aspect, a terminal device is provided, comprising 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 call the computer program in the memory so that the communication device executes part or all of the steps in the method of the first aspect.

[0008] In a fourth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device. In another possible design, the system may also include other devices that interact with the terminal device in the solution provided in the embodiment of the present application.

[0009] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device to execute part or all of the steps in the methods of the above aspects.

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

[0011] In a seventh aspect, an embodiment of the present application provides a computer program, which is operable to enable a communication device to execute part or all of the steps in the methods of the above aspects.

[0012] In an eighth aspect, an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0013] In an embodiment of the present application, the terminal device can transmit a reference signal (i.e., a first reference signal) for sideline positioning in the time slot for sending and receiving other sideline information. That is, the first reference signal resources and the resources of other sideline information share a resource pool to achieve sideline positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0015] FIG2 is a diagram showing an example of a sideline communication scenario within network coverage.

[0016] FIG3 is an example diagram of a side communication scenario with partial network coverage.

[0017] FIG4 is a diagram showing an example of a side communication scenario outside network coverage.

[0018] FIG5 is a diagram showing an example of a side communication scenario based on a central control node.

[0019] FIG6 is a diagram illustrating an example of a broadcast-based sideline communication method.

[0020] FIG. 7 is an exemplary diagram of a sideline communication method based on unicast.

[0021] FIG8 is an example diagram of a sideline communication method based on multicast.

[0022] FIG9 is a diagram showing an example of a time slot structure of a sideline communication system.

[0023] FIG10 is a diagram showing an example of the structure of the second-order SCI in a time slot.

[0024] FIG11 is an example diagram of the time domain positions of PSCCH DMRS symbols within a time slot.

[0025] FIG12 is an example diagram of single-symbol DMRS frequency domain type 1. FIG.

[0026] FIG. 13 is a diagram illustrating an example of resources for transmitting a DL PRS.

[0027] FIG14 is a schematic diagram of the structure of an interleaved resource block.

[0028] FIG15 is a diagram showing an example of a frame structure of the SL-U system.

[0029] FIG16 is a diagram illustrating an example of an RB set.

[0030] FIG17 is a flow chart of a method for wireless communication provided in an embodiment of the present application.

[0031] FIG18 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0032] FIG19 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

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

[0034] Communication system architecture

[0035] FIG1 is a diagram illustrating an exemplary system architecture of a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0036] FIG1 exemplarily shows a network device and a terminal device. 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 of the network device 110, or all be located outside the network coverage of the network device 110, or some may be located within the coverage of the network device 110 and others outside the network coverage of the network device 110. This is not limited in the embodiments of the present application.

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

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

[0039] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0040] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by 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 based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

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

[0043] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

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

[0045] Sideline communication under different network coverage conditions

[0046] Sidelink communication refers to a communication technology based on a sidelink. Sidelink communication can be, for example, device-to-device (D2D) or vehicle-to-everything (V2X) communication. In traditional cellular systems, communication data is received or sent between terminal devices and network devices, while sidelink communication supports direct communication and data transmission between terminal devices. Compared with traditional cellular communication, direct communication data transmission between terminal devices can have higher spectrum efficiency and lower transmission latency. For example, the vehicle networking system adopts sidelink communication technology.

[0047] In side communication, according to the network coverage of the terminal device, the side communication can be divided into side communication within the network coverage, side communication with partial network coverage, and side communication outside the network coverage.

[0048] Figure 2 illustrates an example scenario for sidelink communication within network coverage. In the scenario shown in Figure 2, both terminal devices 120a are within the coverage 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 sidelink configuration based on the configuration signaling from network device 110. After both terminal devices 120a have configured their sidelinks, sidelink communication can proceed on the sidelink.

[0049] Figure 3 is an example diagram of a sidelink communication scenario with partial network coverage. In the scenario shown in Figure 3, terminal device 120a performs sidelink communication with terminal device 120b. Terminal device 120a is located within the coverage range of network device 110, so terminal device 120a can receive the configuration signaling of network device 110 and determine the sidelink configuration based on the configuration signaling of network device 110. Terminal device 120b is located outside the network coverage and cannot receive the configuration signaling of network device 110. In this case, terminal device 120b can determine the sidelink configuration based on pre-configuration information and / or information carried in the physical sidelink broadcast channel (PSBCH) sent by terminal device 120a within the network coverage. After both terminal device 120a and terminal device 120b perform sidelink configuration, sidelink communication can be performed on the sidelink.

[0050] Figure 4 illustrates an example scenario for sidelink communication outside of network coverage. In the scenario shown in Figure 4, both terminal devices 120b are outside of network coverage. In this scenario, both terminal devices 120b can determine the sidelink configuration based on pre-configured information. After both terminal devices 120b have configured their sidelinks, sidelink communication can proceed over the sidelink.

[0051] Sideline communication based on central control node

[0052] Figure 5 is an example diagram of a sideline communication scenario based on a central control node. In this sideline communication scenario, multiple terminal devices can form a communication group, and the communication group has a central control node. The central control node can be a terminal device in the communication group (such as terminal device 1 in Figure 5), and the terminal device can also be called a cluster head (CH) terminal device. The central control node can be responsible for completing one or more of the following functions: establishing a communication group, joining and leaving group members of the communication group, coordinating resources within the communication group, allocating sideline transmission resources to other terminal devices, receiving sideline feedback information from other terminal devices, and coordinating resources with other communication groups.

[0053] Data transmission method of side communication

[0054] Some sidewalk 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 around the transmitting terminal. Taking Figure 6 as an example, terminal device 1 is the transmitting terminal, and the receiving terminal corresponding to the transmitting terminal is any terminal device around terminal device 1, for example, terminal device 2 to terminal device 6 in Figure 6.

[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) hopes to support autonomous driving. Autonomous driving places higher requirements on data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc. Therefore, in order to improve the performance of data interaction between vehicles, NR-V2X introduces unicast transmission and multicast transmission.

[0056] For unicast transmission, there is typically only one receiving terminal. For example, in Figure 7, unicast transmission occurs between terminal devices 1 and 2. Terminal device 1 can be the sending terminal, and terminal device 2 can be the receiving terminal, or vice versa.

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

[0058] NR-V2X time slot structure

[0059] The NR-V2X system has lower latency than the LTE-V2X system. Therefore, the multiplexing method of the physical sidelink control channel (PSCCH) and physical sidelink shared channel (PSSCH) of the NR-V2X system has been redesigned compared to the LTE-V2X system. The time domain resource allocation of NR-V2X is based on time slots. 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 sent on the second symbol. At the end of the time slot, a symbol is reserved for transceiver conversion, which is used for the UE to switch from the transmit (or receive) state to the receive (or transmit) state.

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

[0061] The number of PRBs occupied by the PSCCH in the frequency domain is configurable. For example, the 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 the PSCCH is within the range of a PSSCH subband. If the number of PRBs occupied by the PSCCH is less than the size of a PSSCH subchannel, or the PSSCH frequency domain resources include multiple subchannels, the PSCCH can be frequency-division multiplexed with the PSSCH in the OFDM symbol where the PSCCH resides.

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

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

[0064] Figure 9 shows an example diagram of the time slot structure of some sideline communication systems (such as NR-V2X systems). As shown in Figure 9, the network configuration parameters sl-StartSymbol=3, sl-LengthSymbols=11, that is, the 11 symbols starting from symbol index 3 in a time slot can be used for sideline transmission. There are PSFCH transmission resources in this time slot. The PSFCH occupies symbols 11 and 12, where symbol 11 is used as the AGC symbol of the PSFCH, and symbols 10 and 13 are used as GPs respectively. Therefore, the symbols that can be used for PSSCH transmission are symbols 3 to 9, where the PSCCH occupies 3 time domain symbols, that is, the PSCCH occupies symbols 3, 4, and 5, and symbol 3 is usually used as an AGC symbol.

[0065] PSSCH can be used to carry second-order sidelink control information (SCI) and sidelink shared channel (SL-SCH). The second-order SCI may include different SCI formats. For example, two second-order SCI formats are defined in 3GPP R16, namely SCI format 2-A and SCI format 2-B. SCI format 2-B is applicable to multicast communication modes that perform sidelink hybrid automatic repeat request (HARQ) feedback based on distance information; SCI format 2-A is applicable to other scenarios, such as unicast, multicast, and broadcast that do not require sidelink HARQ feedback, unicast communication modes that require sidelink HARQ feedback, and multicast communication modes that require feedback of positive acknowledgment (ACK) or negative acknowledgment (NACK). In 3GPP R17, an additional second-order SCI format, namely SCI format 2-C, is introduced to indicate reference resource sets and trigger signaling in specific circumstances.

[0066] Figure 10 shows an example of the second-order SCI structure in a time slot. As shown in Figure 10, the modulation symbols of the second-order SCI are mapped starting from the symbol containing the first PSSCH modulation and demodulation reference signal, first in the frequency domain and then in the time domain. This symbol is then interleaved and multiplexed with the resource elements (REs) of the demodulation reference signal (DMRS). Furthermore, the modulation symbols of the second-order SCI cannot be mapped to the REs containing the phase tracking reference signal (PT-RS).

[0067] In the sidewalk communication system, the UE's autonomous resource selection or the determination of transmission resources based on the network's sidewalk resource scheduling may cause different UEs to send PSCCH on the same time-frequency resources. In order to ensure that the receiver can detect at least one PSCCH in the event of a PSCCH resource conflict, LTE-V2X adopts a PSCCH DMRS randomization design scheme. Specifically, when sending PSCCH, the UE can randomly select a value from {0, 3, 6, 9} as the cyclic shift of the DMRS. If multiple UEs use different cyclic shifts to send PSCCH DMRS on the same time-frequency resources, the receiving UE can still detect at least one PSCCH through the orthogonal DMRS. For the same purpose, NR-V2X introduces three PSCCH DMRS frequency domain orthogonal covering codes (OCC) for the transmitting UE to randomly select, as shown in Table 1, where the i-th bit of the OCC mask is applied to the i-th DMRS RE in the resource block (RB), thereby achieving the effect of distinguishing different UEs.

[0068] Table 1

[0069] The DMRS of PSSCH in some sideline communication systems (such as NR-V2X systems) draws on the design of the NR Uu interface and adopts multiple time-domain PSSCH DMRS patterns. In a resource pool, the number of DMRS patterns that can be used is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and the number of PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol in the pattern are shown in Table 2. Figure 11 shows a schematic diagram of the time domain position of 4 DMRS symbols in a time slot when the PSSCH has 13 symbols.

[0070] Table 2

[0071] In some embodiments, if multiple time-domain DMRS patterns are configured within a resource pool, the transmitting UE can select the specific time-domain DMRS pattern to use and indicate this in the first-order SCI. This design allows high-speed UEs to select a high-density DMRS pattern, thereby ensuring channel estimation accuracy; while low-speed UEs can use a low-density DMRS pattern, thereby improving spectrum efficiency.

[0072] The generation method of the PSSCH DMRS sequence is almost identical to that of the PSCCH DMRS sequence. The only difference is the initialization formula c(m) of the pseudo-random sequence. init middle, p i The i-th cyclic redundancy check (CRC) bit of the PSCCH that schedules the PSSCH is L, which is the number of bits of the PSCCH CRC, for example, L=24.

[0073] In the NR communication system, two frequency domain DMRS patterns are supported in PDSCH and PUSCH, namely DMRS frequency domain type 1 and DMRS frequency domain type 2. For each frequency domain type, there are two different types: single DMRS symbol and double DMRS symbol. Single-symbol DMRS frequency domain type 1 supports 4 DMRS ports, and single-symbol DMRS frequency domain type 2 can support 6 DMRS ports. In the case of double DMRS symbols, the number of supported ports is doubled. However, in sideline communication systems (such as NR-V2X), since PSSCH only needs to support two DMRS ports at most, only single-symbol DMRS frequency domain type 1 can be supported. Figure 12 is an example diagram of a single-symbol DMRS frequency domain type 1.

[0074] Sidelink transmission block size (TBS)

[0075] PSSCH follows the TBS determination mechanism of the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) in NR, that is, the TBS can be determined based on the reference value of the number of REs used for PSSCH in the time slot where PSSCH is located, so that the actual code rate can be as close to the target code rate as possible. It should be noted that the purpose of using the reference value of the number of REs instead of the actual number of REs is to ensure that the number of REs used to determine the TBS remains unchanged during the PSSCH retransmission process, so that the determined TBS is the same. In order to achieve this goal, the reference value N of the number of REs occupied by PSSCH in the TBS determination process is used to determine the number of REs occupied by PSSCH. RE Determined by the formula (0-1):

[0076] where n PRB is the number of PRBs occupied by PSSCH, is the number of REs occupied by the first-order SCI (including the REs occupied by the DMRS of the PSCCH), is the number of REs occupied by the second-order SCI, N′ RE Indicates the number of reference REs that can be used for PSSCH within a PRB, determined by formula (0-2):

[0077] in:

[0078] Indicates the number of subcarriers in a PRB;

[0079] Indicates the number of symbols available for sidelink in a time slot, excluding the last GP symbol and the first symbol used for AGC.

[0080] or 3. The specific value is indicated by the "PSFCH symbol number" field in the first-order SCI, which is the reference value of the number of symbols occupied by PSFCH.

[0081] The value of is configured by the RRC layer parameters and is used to indicate the reference value of the number of REs occupied by PT-RS and CSI-RS.

[0082] It represents the average number of DMRS REs in a time slot and is related to the DMRS pattern allowed in the resource pool, as shown in Table 3.

[0083] Table 3

[0084] Second level SCI

[0085] NR-V2X supports a two-order SCI design. The first-order SCI carries information related to resource listening, including the time and frequency domain resources of the scheduled PSSCH, and indicates the bit rate, format, and other information of the second-order SCI. The second-order SCI provides other information required for PSSCH decoding.

[0086] The cyclic redundancy check (CRC) length of the second-order SCI is 24 bits, and it uses Polar coding and fixed QPSK modulation. It uses the same transmission port as the PSSCH data portion, so it can be demodulated using the PSSCH demodulation reference signal. However, unlike the transmission method of the PSSCH data portion, when the PSSCH adopts a dual-stream transmission method, the modulation symbols sent by the second-order SCI on both streams are exactly the same. This design can ensure the reception performance of the second-order SCI in highly correlated channels. The code rate of the second-order SCI can be dynamically adjusted within a certain range. The specific code rate used is determined by the code rate corresponding to the MCS index indicated by the "Second-order SCI Code Rate Offset" field in the first-order SCI and 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 the receiver determines the code rate of the second-order SCI through the first-order SCI, it also needs to determine the number of REs occupied by the second-order SCI in order to decode the second-order SCI. The number of REs occupied by the second-order SCI is Q' SCI2 Determined by formula 0-3:

[0087] in:

[0088] O SCI2 Indicates the number of second-order SCI information bits, which is determined by the second-order SCI format.

[0089] L SCI2 Indicates the CRC length of the second-order SCI, which is 24 bits.

[0090] is the rate offset of the second-order SCI, in a resource pool There are four optional values, the minimum optional value is 1.125, and the maximum optional value is 20. The above four optional values ​​are configured by RRC signaling. The value of is selected by the transmitting terminal and indicated by the "Second-order SCI Rate Offset" field in SCI format 1-A. Because the actual number of REs occupied by the second-order SCI is used to determine the TB size carried by the PSSCH, the code rate used by the second-order SCI cannot change during a PSSCH retransmission to ensure that the TB size determined by the receiver remains the same.

[0091] is the modulation order of the second-order SCI.

[0092] R is the code rate corresponding to the MCS index indicated by the "MCS" field in SCI format 1-A, that is, the code rate used in the PSSCH data part.

[0093] Indicates the number of REs that can be used to map the second-order SCI on the lth OFDM symbol, Indicates the number of REs within the transmission bandwidth of PSSCH, is the number of REs used for PSCCH in the lth OFDM symbol.

[0094] and in:

[0095] Determined by the sidelink timeslot structure, it indicates the number of OFDM symbols available for sidelink in the current timeslot, excluding the first AGC symbol and the last GP symbol.

[0096] The number of symbols used for PSFCH indicated by the "PSFCH symbol number" field in SCI format 1-A.

[0097] The value range of γ is 0 to 11, indicating the number of REs remaining 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.

[0098] α is the maximum spectral efficiency of the second-order SCI configured / pre-configured by the RRC parameter sl-Scaling.

[0099] Since a PSSCH can be transmitted up to 32 times in NR-V2X, if there are PSFCH resources in the resource pool and the configuration period of PSFCH resources is 2 or 4, the OFDM symbols available in the time slot where different transmissions of a PSSCH are located may change. The difference in the number of symbols available for PSSCH transmission in a time slot may cause Q′ SCI2Different, and Q′ SCI2 The change of will lead to the change of the size of the TB carried by PSSCH. In order to ensure that the transport block size (TBS) remains unchanged during multiple transmissions of PSSCH, The actual number of PSFCH symbols is not used. The number of REs occupied by the PSSCH DMRS and the number of REs occupied by the PT-RS, which may change during the retransmission process, are not taken into account.

[0100] As mentioned above, the modulation symbols of the second-order SCI are mapped starting from the symbol where the first PSSCH modulation and demodulation reference signal is located, first in the frequency domain and then in the time domain, and are multiplexed with the RE of the DMRS on this symbol through interleaving. In addition, the modulation symbols of the second-order SCI cannot be mapped to the RE where the PT-RS is located, as shown in Figure 10.

[0101] Downlink-based positioning

[0102] In downlink positioning, the downlink positioning reference signal (DL PRS) parameter configuration can include four layers: the positioning frequency layer, the TRP layer, the PRS resource set, and the PRS resource. The following describes the DL PRS parameter configuration in detail.

[0103] The network device can provide the terminal device with DL PRS configurations for four positioning frequency layers. The parameter structure of 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 frequency domain starting frequency position; DL PRS frequency domain reference point "Point A"; and DL PRS comb size "Comb-N".

[0104] The value of the frequency domain resource bandwidth of the DL PRS may be the number of PRBs allocated to the DL PRS. In some cases, the minimum value of the frequency domain resource bandwidth of the DL PRS may be 24 PRBs, and the granularity may be 4 PRBs. The maximum value of the frequency domain resource bandwidth of the DL PRS may be 272 PRBs.

[0105] The frequency domain starting frequency position of the DL PRS resource is used to indicate the index of the starting PRB of the DL PRS in the frequency domain resource allocation. The PRB index is defined relative to the frequency domain reference point "Point A" of the DL PRS.

[0106] The above DL PRS configuration parameters corresponding to each positioning frequency layer can be applied to all DL PRS resources contained in the positioning frequency layer. That is to say, in 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 sent on the same frequency subband, and occupy the same bandwidth. Such a design can support terminal devices to simultaneously receive and measure DL PRS from multiple different TRPs on the same frequency point.

[0107] In some scenarios, the parameters of the TRP layer may include an ID parameter for uniquely identifying and locating the TRP, such as the physical cell ID of the TRP, the NR cell global identifier (NCGI) of the TRP, the absolute radio frequency channel number (ARFCN) of the TRP, etc. Typically, up to two DL PRS resource sets can be configured in each TRP layer.

[0108] 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 this 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 (expressed by "nr-DL-PRS-ResourceSetID"); DL PRS transmission period and time slot offset (expressed by "dl-PRS-Periodicity-and-ResourceSetSlotOffset"); DL PRS resource repetition factor (expressed by "dl-PRS-ResourceRepetitionFactor"); DL PRS resource repeated transmission time interval (expressed by "dl-PRS-ResourceTimeGap"); DL PRS muting configuration; and the number of OFDM symbols occupied by DL PRS resources (expressed by "dl-PRS-NumSymbols").

[0109] The transmission period and time slot offset of the above-mentioned 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 value of the configurable DL PRS transmission period is 4 milliseconds, and the maximum value of the configurable DL PRS transmission period is 10240 milliseconds. Currently, the configuration of DL PRS supports flexible subcarrier spacing including 15KHz, 30KHz, 60KHz and 120KHz. In the case of different subcarrier spacing, the configurable DL PRS transmission period value range can be the same. Figure 13 shows a schematic diagram of resources for transmitting DL PRS when the comb size is 2 and the RE offset is 0 and 1 respectively.

[0110] The repetition factor of the above-mentioned DL PRS resource is used to indicate the number of repeated transmissions of the DL PRS resource in each DL PRS transmission cycle. At present, the repeated transmission of the same DL PRS resource can be used by the terminal device to aggregate the DL PRS energy of multiple transmissions, which helps to increase the coverage distance of the DL PRS and improve the positioning accuracy. In the FR2 system, the repeated transmission of the DL PRS resource can also be used by the terminal device to perform receiving beam scanning operations. The terminal device can use different receiving beams to receive the repeated transmission of the same DL PRS resource, so as to find the best TRP transmission beam and terminal device receiving beam matching. On the other hand, the repeated transmission of DL PRS resources will increase the transmission overhead of DL PRS. At present, in order to control the transmission overhead, in the 3GPP NR R16 specification, the repetition factor of DL PRS resources is 1, 2, 4, 6, 8, 16 and 32.

[0111] The time interval for repeated transmission of the DL PRS resource is used to indicate the number of time slots between two consecutive repeated transmissions of the same DL PRS resource.

[0112] The above-mentioned DL PRS silence configuration is used to instruct DL PRS not to send DL PRS on certain allocated time-frequency resources. The silence configuration can be understood as DL PRS not being sent on all allocated time-frequency resources, but intentionally not being sent on certain designated time-frequency resources. On the one hand, the silence configuration can avoid conflicts between DL PRS and other signals (such as SSB). On the other hand, the silence configuration can avoid interference between signals sent by different TRPs. For example, the silence configuration can instruct the TRP that is closer to the terminal device not to send DL PRS, and configure the TRP that is farther away from the terminal device to send DL PRS. In this way, the terminal device can receive the DL PRS from the farther TRP without being interfered with by the TRP that instructs silence.

[0113] The number of OFDM symbols occupied by the DL PRS resource is used to indicate the number of OFDM symbols allocated to one DL PRS resource within one time slot.

[0114] Typically, the DL PRS configuration parameters included in the parameters of the above-mentioned TRP layer can be applied to all DL PRS resources in the DL PRS resource set corresponding to the TRP layer. Therefore, the 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.

[0115] In some implementations, for each DL PRS resource, the DL PRS configuration parameters may also include: DL PRS resource identification ID (expressed by "nr-DL-PRS-ResourceID"); DL PRS sequence ID (expressed by "dl-PRS-SequenceID"); DL PRS starting frequency domain resource unit offset (expressed by "dl-PRS-CombSizeN-AndReOffset"); DL PRS resource slot offset (expressed by "dl-PRS-ResourceSlotOffset"); DL PRS OFDM symbol offset (expressed by "dl-PRS-ResourceSymbolOffset"); DL PRS quasi co-location (QCL) information (expressed by "dl-PRS-QCL-Info").

[0116] The starting frequency domain resource unit offset of the DL PRS is used to indicate the frequency domain resource unit offset value used for resource mapping on the first allocated OFDM symbol of the DL PRS resource in a time slot. Generally, based on this parameter and the relative offset value defined in TS38.211, the terminal device can determine the frequency domain resource unit offset value used for resource mapping on each OFDM symbol.

[0117] The resource time slot offset of the DL PRS is used to indicate the time slot offset relative to the DL PRS resource set. This parameter can determine the time slot position of each DL PRS resource.

[0118] The OFDM symbol offset of the DL PRS is used to indicate the time-frequency resource allocation position of the DL PRS resource in a time slot. This parameter can be used to indicate the index number of the starting OFDM symbol in the time slot.

[0119] The QCL information of the DL PRS is used to indicate the QCL information of the DL PRS.

[0120] Sidelink over unlicensed spectrum (SL-U)

[0121] When performing sidelink transmission on unlicensed spectrum, sidelink transmission needs to meet specific regulatory requirements, including minimum occupied channel bandwidth (OCB) and maximum power spectral density (PSD). For OCB requirements, when the UE uses the channel for data transmission, the occupied channel bandwidth must be no less than 80% of the channel bandwidth; for maximum power spectral density requirements, the power transmitted by the UE per 1MHz cannot exceed 10dBm. To meet OCB and PSD regulatory requirements, sidelink transmission on unlicensed spectrum needs to adopt an interlaced resource block (IRB) structure. An IRB consists of N discrete RBs in the frequency domain, and a total of M IRBs are included in the frequency band. The RBs included in the mth IRB are {m, M+m, 2M+m, 3M+m, ...}.

[0122] Figure 14 shows a schematic diagram of the interleaved resource block structure. As shown in Figure 14, the system bandwidth includes 20 RBs, including 5 IRBs (i.e., M = 5), each IRB includes 4 RBs (i.e., N = 4), and the frequency domain interval between two adjacent RBs in the same IRB is the same, i.e., 5 RBs apart. The numbers in the boxes in the figure represent the IRB index.

[0123] In the SL-U system, if IRB-based resource allocation granularity is adopted, channels such as the PSCCH and PSSCH in the SL-U system should all be based on the IRB structure. Figure 15 shows an example of the frame structure of the SL-U system. The example frame structure in Figure 15 is an example of a frame structure in which only the PSCCH and PSSCH are included in the time slot, without the PSFCH. As shown in Figure 15, the bandwidth includes 20 RBs, and 5 IRB resources are configured, i.e., M = 5. Each IRB resource includes 4 RBs, and the numbers in the boxes represent the IRB index. In Figure 15, the system configures the PSCCH to occupy one IRB resource and two OFDM symbols in the time domain. The PSSCH uses IRB granularity, with the first symbol in the time slot being an AGC symbol and the last symbol being a GP symbol. In Figure 15, PSSCH 1 occupies IRB #0 and IRB #1, with its corresponding PSCCH 1 occupying IRB #0. PSSCH 2 occupies IRB #2, with its corresponding PSCCH 2 also occupying IRB #2. It should be noted that, for simplicity, FIG15 does not illustrate the resources occupied by the second-order SCI and the resources occupied by the PSCCH DMRS and PSSCH DMRS.

[0124] In unlicensed spectrum, UEs can access channels using listen-before-talk (LBT). LBT uses a 20MHz granularity in the frequency domain, with each 20MHz interval being called an RB Set. A carrier can contain multiple RB Sets, separated by guard intervals, as shown in Figure 16.

[0125] In unlicensed spectrum, UEs must first perform LBT before they can access the channel. However, the time it takes for the UE to complete LBT is uncertain. In some implementations, if a UE is restricted to transmitting only from the start of a timeslot, it may miss a transmission opportunity due to failure to complete LBT before that time. Therefore, SL-U considers adding a transmission starting point within a timeslot, i.e., multi-starting point transmission. For example, the additional starting point can be the third or fourth OFDM symbol in the timeslot.

[0126] Sidelink-based positioning

[0127] In 3GPP R-17, 3GPP RAN conducted studies on sidelink-based positioning, for example, on "NR positioning enhancement" and "scenarios and requirements for NR positioning use cases in coverage, partial coverage and out of coverage". Among them, the study on "scenarios and requirements for NR positioning use cases in coverage, partial coverage and out of coverage" focused on V2X and public safety use cases. In addition, some organizations (such as the 3GPP SA1 working group) have also developed requirements for "ranging-based services" and positioning accuracy requirements for IoT use cases in out-of-coverage scenarios. 3GPP needs to study and develop sidelink-based positioning solutions to support the use cases, scenarios and requirements identified in these activities.

[0128] To improve positioning accuracy, especially for UEs outside cellular network coverage, 3GPP completed feasibility and performance studies of positioning technology based on sidestream positioning reference signals in the early stages of Release 18. Next, 3GPP will standardize solutions for sidestream positioning (including ranging and direction finding) in NR systems. This sidestream positioning solution primarily includes the following standardization work.

[0129] Standardization Work 1: Standardization of the Sidelink Positioning Reference Signal (SL PRS). The SL PRS can use a frequency-domain structure based on a comb pattern (including full RE mapping mode) and a pseudo-random sequence format. The SL PRS can be designed based on the existing DL-PRS sequence and support a maximum SL PRS bandwidth of 100 MHz in FR1.

[0130] Standardization work 2: Standardize the measurement quantities used for side-by-side positioning. For example, standardize the measurement quantities used to support SL RTT, SL-AOA, and SL-TDOA positioning methods.

[0131] Standardization work three: Standardize the resource allocation scheme of SL PRS. For example, the resource allocation scheme of SL PRS includes resource allocation scheme 1 and scheme 2, where scheme 1 corresponds to the network allocating SL PRS resources, and scheme 2 corresponds to the UE autonomously selecting SL PRS resources. In some implementations, the system supports SL PRS and Rel-16 / 17 / 18 sideline communication shared resource pool and SL PRS dedicated resource pool. In some implementations, for scheme 2, it is necessary to study and standardize one or more of the following: resource selection based on channel sensing, random resource selection, congestion control, and resource selection based on UE coordination.

[0132] Standardization work 4: Standardize the open-loop power control mechanism of SL PRS transmission, etc.

[0133] Some communication systems (such as NR systems) introduce sidelink-based positioning to enhance positioning technology. How to determine the resources of reference signals used for sidelink positioning, such as SL PRS, is a problem that needs to be solved.

[0134] To address the above issues, an embodiment of the present application provides a method for wireless communication. In this embodiment of the present application, a terminal device can transmit a reference signal (i.e., a first reference signal) for sidetrack positioning in a time slot for transmitting and receiving other sidetrack information to implement sidetrack positioning.

[0135] 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 scenarios using licensed spectrum. In some embodiments, the technical solution of this application can be applied to scenarios using unlicensed spectrum.

[0136] The following describes a method for wireless communication provided by an embodiment of the present application in conjunction with Figure 17. Figure 17 is a flow chart of a method for wireless communication provided by an embodiment of the present application. The method shown in Figure 17 can be executed by a terminal device. This embodiment of the present application does not specifically limit the terminal device; the terminal device can be any device related to side-by-side positioning.

[0137] The method shown in FIG. 17 may include step S1710 .

[0138] In step S1710, 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 sideways positioning.

[0139] In some embodiments, the first time slot may include resources in a shared resource pool between sideline communications. The shared resource pool between sideline communications may be understood as including PSSCH resources and resources for transmitting other sideline information other than PSSCH (e.g., signals for sideline positioning). For example, the resource pool may include SL PRS resources and PSSCH resources.

[0140] In some embodiments, the first PSSCH may be any of the physical sidelink shared channels mentioned above. For example, the first PSSCH may carry sidelink data and / or second-order SCI.

[0141] In some embodiments, the first reference signal may be, for example, the SL PRS mentioned above. In other embodiments, the first reference signal may also be other signals for sideways positioning used in the communication system in the future.

[0142] In an embodiment of the present application, the terminal device can transmit a reference signal (i.e., a first reference signal) for side positioning in the time slot of transmitting and receiving the first PSSCH, that is, the first reference signal and the first PSSCH share a resource pool to achieve side positioning.

[0143] When the first reference signal shares a resource pool with sidelink communication, the first reference signal and the first PSSCH may be transmitted in different OFDM symbols within the same time slot (i.e., the first time slot). Compared to not transmitting the first reference signal in the first time slot, or when there are no resources in the first time slot for transmitting the first reference signal, the number of OFDM symbols in the first time slot that can be used for transmitting the first PSSCH is reduced.

[0144] To address the issue of how to determine the TBS in the first time slot in the above situation, the TBS of the first PSSCH can be determined based on a first parameter, and the first parameter can be associated with the 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, where the reference value for the number of OFDM symbols mentioned here is associated with the first reference signal.

[0145] The above two methods (ie, embodiment 1 and embodiment 2) of determining the TBS of the first PSSCH based on the first parameter will be introduced below respectively.

[0146] Example 1

[0147] As mentioned above, the first parameter may be associated with the number of OFDM symbols occupied by the first reference signal. For example, the first parameter may be the number of OFDM symbols occupied by the first reference signal. In another example, the first parameter may be determined based on the number of OFDM symbols occupied by the first reference signal.

[0148] In some embodiments, the first parameter may be indicated based on the 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 is introduced to support sideline positioning. Therefore, the format of the second-order SCI mentioned herein may be, for example, SCI format 2-D.

[0149] The first information may directly or indirectly indicate the first parameter. For example, the first information may include the first parameter. In another example, the first information may indicate the first parameter via a configuration index or identifier.

[0150] To ensure the flexibility of TB transmission, the same TB may not always be sent in the same time slot as the first reference signal in N transmissions. For example, only the TB and the first reference signal are sent in the same time slot in M ​​transmissions, and the TB is sent alone in the other NM transmissions, that is, not together with the first reference signal, where M≤N.

[0151] That is, during multiple transmissions (including initial transmissions and retransmissions) of the same TB, the TB is not sent with the first reference signal in some time slots, and is sent with the first reference signal in other time slots. In this case, if the size of the PSSCH TBS is determined based on the number of OFDM symbols actually occupied by the first reference signal, the size of the TB determined during different transmissions may be different.

[0152] Therefore, the TBS of the second PSSCH can be the same as the TBS of the first PSSCH, so that energy can be aggregated for multiple transmitted TBs. The second PSSCH and the first PSSCH transmit the same TB. The second PSSCH mentioned here does not transmit the reference signal for side positioning. In other words, the second PSSCH can be sent separately for the TB mentioned above, and is not sent together with the first reference signal.

[0153] In some embodiments, the SCI format of the second-order SCI associated with the second PSSCH may be SCI format 2-D. For example, the number of OFDM symbols occupied by the first reference signal in the second PSSCH may 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.

[0154] However, in this case, if the number of OFDM symbols occupied by the first reference signal indicated in the second-order SCI is 0, the PSSCH associated with the second-order SCI may be the second PSSCH or other PSSCH except the second PSSCH.

[0155] Therefore, in some embodiments, the second-order SCI associated with the PSSCH may include second information, and the second information may be used to indicate whether the PSSCH is the second PSSCH mentioned above, or in other words, the TBS of the PSSCH may be determined based on the second information. For example, if the value of the second information is the first value, the PSSCH is the second PSSCH mentioned above, that is, the TBS of the PSSCH is the same as the TBS of the first PSSCH. For another example, if the value of the second information is the second value, the PSSCH is not the second PSSCH mentioned above, then the TBS of the PSSCH can be determined based on the 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.

[0156] Alternatively, the second-order SCI associated with the second PSSCH may include second information, and the second information may be used to determine the TBS of the second PSSCH. For example, if the value of the second information is the first value, 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 the second value, 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 may be determined based on the formula (0-1) mentioned above.

[0157] 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 the 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 the PSSCH is the same as the TBS of the first PSSCH. When the bit field is a non-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 the number of REs it occupies, that is, based on the formula (0-1) mentioned above. The size of the bit field mentioned here and the specific value are only given as examples. For example, the specific value mentioned here can also be 0, and this application does not limit this.

[0158] In other embodiments, the SCI format of the second-order SCI associated with the PSSCH not used to transmit the reference signal for sideline positioning may be SCI format 2-A, SCI format 2-B, and SCI format 2-C. Similarly, the PSSCH associated with the second-order SCI may be the second PSSCH described above, or may be a PSSCH other than the second PSSCH described above.

[0159] Therefore, in some embodiments, if another terminal device receives multiple second-order SCIs associated with a PSSCH for transmitting the same TB, and at least one of the multiple second-order SCIs has an SCI format 2-D format, then the TBSs of the PSSCHs associated with the multiple second-order SCIs are 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 2-D format, 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-line communication with the terminal device in the embodiment of the present application.

[0160] There are many ways to determine whether multiple PSSCHs are used to transmit the same TB, that is, the PSSCHs transmitting the same TB can meet one or more conditions. For example, the first PSSCH and the second PSSCH mentioned above can meet 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 (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.

[0161] In some embodiments, the first PSSCH may 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 may be the previous PSSCH received by another terminal device, or compared to the second PSSCH, the first PSSCH may 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.

[0162] In an embodiment of the present application, 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 helps to accurately adjust the TBS according to available resources, thereby helping to improve spectrum efficiency.

[0163] Example 2

[0164] As mentioned above, the first parameter can be associated with a reference value for the number of OFDM symbols. The reference value for the number of OFDM symbols mentioned 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 first parameter can be determined based on 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.

[0165] In some embodiments, the second-order SCI associated with the first PSSCH may include a first indication field, and the first indication field may be used to indicate the above-mentioned first parameter.

[0166] 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. For example, 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.

[0167] As an example, the number of OFDM symbols used for the first reference signal has A values ​​(ie, 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 that the first parameter is one of the A values ​​of the number of OFDM symbols used for the first reference signal. In this way, the first indication field can be used to indicate multiple situations of the number of OFDM symbols used for the first reference signal, providing flexibility.

[0168] It should be noted that the correspondence between the A+1 values ​​of the first indication field and the multiple values ​​of the first parameter can be determined according to usage requirements; the correspondence between the A+1 values ​​of the first indication field and the multiple values ​​of the first parameter can be pre-configured or dynamically indicated, and this application does not limit this.

[0169] In some embodiments, the first indication field may occupy 1 bit, and 1 bit 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.

[0170] For example, X may be a maximum value among multiple values ​​of the number of OFDM symbols used for the first reference signal, which helps to avoid resource conflict between the TB and the first reference signal.

[0171] For another example, X may be determined based on an average value among multiple values ​​of the number of OFDM symbols used for the first reference signal. When the average value of the multiple values ​​of the number of OFDM symbols used for the first reference signal is an integer, X may be the average value among the multiple values ​​of the number of OFDM symbols used for the first reference signal. Otherwise, X may be the value among the multiple values ​​of the number of OFDM symbols used for the first reference signal that is closest to the average value, or may be the integer portion of the average value, or a rounded value of the average value. As an example, if the values ​​of the number of OFDM symbols used for the first reference signal include 1, 3, and 5, that is, the average of the multiple values ​​of the number of OFDM symbols used for the first reference signal is 3, then X can be 3; if the multiple values ​​of the number of OFDM symbols used for the first reference signal include 1, 2, and 5, that is, the average of the multiple 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).

[0172] To simplify the method for determining X, for example, X may be a median value among multiple values ​​of the number of OFDM symbols used for the first reference signal. As an example, if the multiple 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 multiple values ​​of the number of OFDM symbols used for the first reference signal is 2, then X may be 2.

[0173] The above method of determining the first parameter based on the average or median value of multiple values ​​of the number of OFDM symbols used for the first reference signal helps to avoid resource conflicts between the TB and the first reference signal, as well as improve spectrum efficiency.

[0174] For another example, X may be the most frequently used value among multiple values ​​of the number of OFDM symbols used for the first reference signal. The most frequently used value mentioned here may be associated with the usage scenario of sidetrack positioning. For example, in the first scenario, if the most frequently used value among multiple values ​​of the number of OFDM symbols used for the first reference signal is Y, then in this scenario, the value of X may be Y. This helps reduce the probability of resource conflicts.

[0175] Table 4 provides a corresponding relationship table between various values ​​of the number of OFDM symbols used for the first reference signal and X.

[0176] Table 4

[0177] In some embodiments, the above-mentioned determination rule of X can be preconfigured or dynamically indicated. In other embodiments, the correspondence between various values ​​of the number of OFDM symbols used for the first reference signal and X can be preconfigured, such as Table 4, or the correspondence between various values ​​of the number of OFDM symbols used for the first reference signal and X can be dynamically indicated, such as the contents of Table 4.

[0178] In some embodiments, the first parameter is indicated by the first PSSCH transmitting device to the first PSSCH receiving device via high-layer signaling, which helps save processing resources of the receiving device. The high-layer signaling mentioned here may include, for example, sidelink positioning protocol (SLPP) signaling or RRC signaling.

[0179] 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 has one value, the first parameter can be the value of the number of OFDM symbols used for the first reference signal. For another example, if the number of OFDM symbols used for the first reference signal has multiple values, the first parameter can be determined based on the multiple values ​​of the number of OFDM symbols used for the first reference signal.

[0180] The method for determining the first parameter based on multiple values ​​of the number of OFDM symbols used for the first reference signal can be one or more of the multiple methods for determining X based on multiple values ​​of the number of OFDM symbols used for the first reference signal mentioned above. For the sake of brevity, these methods are not further described here. Table 5 provides a table of correspondences between multiple values ​​of the number of OFDM symbols used for the first reference signal and the first parameter.

[0181] Table 5

[0182] In some embodiments, the method for determining the first parameter based on multiple values ​​of the number of OFDM symbols used for the first reference signal may be different from the aforementioned method for determining X based on multiple values ​​of the number of OFDM symbols used for the first reference signal.

[0183] In some embodiments, the TBS of the first PSSCH may be determined based on a second parameter, and the second parameter may be determined based on the first parameter; wherein the second parameter represents a reference value of the number of REs available for the PSSCH within a PRB.

[0184] In some embodiments, the second parameter is also 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 of the number of OFDM symbols occupied by PSFCH; a sixth parameter representing a reference value of the number of REs occupied by PT-RS and / or CSI-RS; and a seventh parameter representing the average number of DMRS REs in a time slot.

[0185] For example, the second parameter may satisfy the following formula:

[0186] in, Represents the first parameter, N′ RE Represents the second parameter, Represents the third parameter, Represents the fourth parameter, Represents the fifth parameter, represents the sixth parameter, Indicates the seventh parameter.

[0187] It should be noted that the one or more resources used for sending the first reference signal in the above-mentioned time slot can be configured / pre-configured in the resource pool, or determined by the sending device and the receiving device through high-layer signaling (such as SLPP layer signaling or RRC layer signaling).

[0188] In an embodiment of the present application, 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, thereby helping to simplify the design of signaling.

[0189] As mentioned above, it is usually necessary to obtain the number of REs occupied by the second-order SCI in order to decode the second-order SCI. As mentioned above, the first reference signal and the first PSSCH may be transmitted in different OFDM symbols within the same time slot (i.e., the first time slot). Compared to not transmitting the first reference signal in the first time slot, or the absence of resources for transmitting the first reference signal in the first time slot, the number of OFDM symbols available for transmitting the first PSSCH in the first time slot is reduced.

[0190] In order to solve the problem of how to determine the number of REs occupied by the second-order SCI associated with the first PSSCH in this case, the method provided in the embodiments of the present application will be introduced in combination with Examples 3 to 5 below.

[0191] Example 3

[0192] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH may be determined based on the number of OFDM symbols used for the first reference signal, where the SCI format of the second-order SCI associated with the first PSSCH may be, for example, SCI format 2-D. For example, the number of REs occupied by the second-order SCI associated with the first PSSCH may be determined based on the number of OFDM symbols included in one or more resources used for the first reference signal within a time slot.

[0193] If the number of OFDM symbols contained in one or more resources used for the first reference signal in the 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 the value. If the number of OFDM symbols contained in one or more resources used for the first reference signal in the 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 the above 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 in the time slot (that is, the maximum value among the above multiple different values), which helps to avoid resource conflicts. For another example, the number of REs occupied by the second-order SCI associated with the first PSSCH can be determined based on the average value or median value of the multiple values ​​of the number of OFDM symbols contained in the resources used for the first reference signal in the time slot. As an example, the determination method based on the average value or median value among the above multiple values ​​can be one or more of the multiple methods for determining the first parameter based on the multiple values ​​of the number of OFDM symbols occupied by one or more resources used for sending the first reference signal. For example, when the number of OFDM symbols contained in the resources used for the first reference signal in 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 a pre-configured, pre-defined or indicated value among the above-mentioned multiple values, such as based on the value of the first parameter in Table 5.

[0194] 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, and the eighth parameter is determined based on one or more of the following: a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal in a time slot; a ninth parameter representing the number of OFDM symbols available for sideline transmission in a time slot; and a tenth parameter representing the number of OFDM symbols occupied by the PSFCH.

[0195] For example, the eighth parameter satisfies the following formula:

[0196] in, Represents the eighth parameter, Indicates the ninth parameter, Represents the tenth parameter, It represents a value determined based on the number of OFDM symbols contained in one or more resources used for the first reference signal in the time slot, such as the maximum number of OFDM symbols contained in the resources used for the first reference signal in the time slot, or determined based on multiple values ​​of the number of OFDM symbols used for the first reference signal.

[0197] It should be noted that the resources used for the first reference signal in the time slot may be configured / pre-configured in a resource pool.

[0198] In an embodiment of the present application, based on the resources configured / pre-configured in the resource pool for sending the first reference signal, the number of REs occupied by the second-order SCI associated with the first PSSCH is determined, which 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.

[0199] Example 4

[0200] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH may not be determined based on the first scaling factor. The first scaling factor is configured by higher-layer signaling, such as a parameter configured by the RRC parameter sl-Scaling or preconfigured for determining the number of REs occupied by the second-order SCI. For example, the first scaling factor may be the maximum spectral efficiency α in formula (0-3).

[0201] 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 indicating the number of bits contained in the second-order SCI; a twelfth parameter indicating the CRC length of the second-order SCI; a thirteenth parameter indicating the code rate offset of the second-order SCI; a fourteenth parameter indicating the modulation order of the second-order SCI; a fifteenth parameter indicating the code rate corresponding to the PSSCH; and a sixteenth parameter indicating the number of REs remaining in the first PRB, where the first PRB is the PRB where the last modulation symbol of the second-order SCI is located. As an example, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0202] Among them, Q′ SCI2 Indicates the number of REs occupied by the second-order SCI associated with the first PSSCH, O SCI2 Indicates the eleventh parameter, L SCI2 Represents the twelfth parameter, Indicates the thirteenth parameter, represents the fourteenth parameter, R represents the fifteenth parameter, and γ represents the sixteenth parameter.

[0203] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, and the first condition is associated with a first scaling factor. For example, the first condition includes:

[0204] Q′ SCI2 -γ is less than or equal to

[0205] Among them, Q′ SCI2 Indicates the number of REs occupied by the second-order SCI associated with the first PSSCH, γ indicates the number of REs remaining in the first PRB, the first PRB is the PRB where the last modulation symbol of the second-order SCI is located, α indicates the first scaling factor, Indicates the number of OFDM symbols available for sideline transmission in a time slot, Indicates the number of OFDM symbols occupied by PSFCH, Indicates the number of REs that can be used to map the second-order SCI on the lth OFDM symbol. The value of l ranges from 0 to 1. For example, the value of the fifteenth parameter R can be adjusted to meet the first condition.

[0206] In the embodiment of the present application, the number of REs occupied by the second-order SCI is not determined based on the first scaling factor, which helps to 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.

[0207] In addition, the embodiment of the present application does not determine the number of REs occupied by the second-order SCI based on the first scaling factor. In other words, the receiving device can determine the number of REs occupied by the second-order SCI to be received without determining the format of the second-order SCI to be received. Therefore, in some cases, it is not necessary to add information indicating the second-order SCI format 2-D to the first-order SCI, which helps save resources.

[0208] Example 5

[0209] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH may be determined based on a second scaling factor, where the second scaling factor is associated with SCI format 2-D.

[0210] Since the second-order SCI 2-D (i.e., the second-order SCI format is SCI format 2-D) is typically transmitted together with the first reference signal, the transmission of the first reference signal will affect the number of REs occupied 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 occupied by the second-order SCI 2-D, or the second scaling factor is not used to determine the scaling factor for the number of REs occupied by the second-order SCI of other formats. For example, the second scaling factor is different from the first scaling factor, which 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. In other words, the first scaling factor is a scaling factor used to determine the number of REs occupied by the second-order SCI 2-A, 2-B, or 2-C.

[0211] Transmitting the second-order SCI 2-D together with the first reference signal may affect the number of REs occupied by the second-order SCI 2-D. Transmitting the second-order SCI 2-D together with the first reference signal may result in fewer available OFDM symbols for the second-order SCI 2-D, or in other words, may reduce the number of REs that can be occupied by the second-order SCI 2-D. Therefore, in some embodiments, the second scaling factor may be smaller than the first scaling factor, thereby helping to reduce the number of REs occupied by the second-order SCI 2-D.

[0212] In some embodiments, the second scaling factor may be configured or preconfigured, such as by RRC parameter configuration or preconfiguration.

[0213] The method of determining the number of REs occupied by the second-order SCI by the second proportional factor in the embodiment of the present application is easy to implement.

[0214] It should be noted that the values ​​and / or meanings of the above-mentioned third parameter, fourth parameter, fifth parameter, sixth parameter, seventh parameter, ninth parameter, tenth parameter, eleventh parameter, twelfth parameter, thirteenth parameter, fourteenth parameter, fifteenth parameter and sixteenth parameter may be the same as the values ​​and / or meanings of the corresponding parameters in formula (0-1), formula (0-2) and formula (0-3) described above.

[0215] It should be noted that the various embodiments mentioned in this application can be used in combination or separately, and the embodiments of this application are not limited to this. For example, the above-mentioned method for determining the TBS of the first PSSCH can be used in combination with the method for determining the number of REs occupied by the second-order SCI, or can be used separately.

[0216] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 17. The device embodiment of the present application is described in detail below in conjunction with Figures 18 and 19. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0217] FIG18 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application. The terminal device 1800 shown in FIG18 may include a determination module 1810.

[0218] The transceiver module 1810 may be configured 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, and the first reference signal is used for sideways positioning.

[0219] 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.

[0220] In some embodiments, the first parameter is associated with the first reference signal, including: 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.

[0221] In some embodiments, the first parameter is indicated based on first information, and the first information is carried in a second-order SCI associated with the first PSSCH.

[0222] In some embodiments, the format of the second-stage SCI is SCI format 2-D.

[0223] In some embodiments, the TBS of the second PSSCH is the same as the TBS of the first PSSCH, wherein the TBs transmitted by the second PSSCH and the first PSSCH are the same.

[0224] In some embodiments, the second PSSCH does not transmit a reference signal for sideline positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

[0225] In some embodiments, the second-order SCI associated with the second PSSCH includes second information, and the second information is used to determine the TBS of the second PSSCH.

[0226] In some embodiments, if the value of the second information is a first value, 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, 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.

[0227] In some embodiments, the second-order SCI associated with the second PSSCH includes third information, where the third information is used to indicate the number of OFDM symbols occupied by a reference signal used for sideline positioning, and the number of OFDM symbols indicated by the third information is 0.

[0228] In some embodiments, the second PSSCH does not transmit a reference signal for sideline 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.

[0229] 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.

[0230] In some embodiments, the first parameter is associated with the first reference signal, including: the first parameter is a reference value of the number of OFDM symbols used for the first reference signal; or, the first parameter is determined based on one or more resources used for sending the first reference signal in a time slot.

[0231] In some embodiments, the second-order SCI associated with the first PSSCH includes a first indication field, and the first indication field is used to indicate the first parameter.

[0232] 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.

[0233] In some embodiments, the number of OFDM symbols used for the first reference signal has A values, and the number of bits occupied by the first indication field is Wherein, A is a positive integer greater than or equal to 1.

[0234] In some embodiments, the first indication field occupies 1 bit, and the 1 bit 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.

[0235] In some embodiments, the first parameter is indicated by the transmitting device of the first PSSCH to the receiving device of the first PSSCH through high-layer signaling.

[0236] In some embodiments, the higher layer signaling includes SLPP signaling or RRC signaling.

[0237] In some embodiments, the TBS of the first PSSCH is determined based on a second parameter, and the second parameter is determined based on the first parameter; wherein the second parameter represents a reference value of the number of REs that can be used for PSSCH within a PRB.

[0238] In some embodiments, the second parameter is also 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 of the number of OFDM symbols occupied by PSFCH; a sixth parameter representing a reference value of the number of REs occupied by PT-RS and / or CSI-RS; and a seventh parameter representing the average number of DMRS REs in a time slot.

[0239] In some embodiments, the second parameter satisfies the following formula:

[0240] in, represents the first parameter, N′ RE represents the second parameter, represents the third parameter, represents the fourth parameter, represents the fifth parameter, represents the sixth parameter, represents the seventh parameter.

[0241] 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 included in one or more resources used for the first reference signal in a time slot.

[0242] 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 included in the resources used for the first reference signal in the time slot.

[0243] 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, and the eighth parameter 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 used for the first reference signal in a time slot; a ninth parameter representing the number of OFDM symbols available for sideline transmission in a time slot; and a tenth parameter representing the number of OFDM symbols occupied by the PSFCH.

[0244] In some embodiments, the eighth parameter satisfies the following formula:

[0245] in, represents the eighth parameter, represents the ninth parameter, represents the tenth parameter, It represents a value determined according to the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot.

[0246] 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, and the first scaling factor is a parameter configured by higher layer signaling for determining the number of REs occupied by the second-order SCI.

[0247] 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, indicating the number of bits contained in the second-order SCI; a twelfth parameter, indicating the CRC length of the second-order SCI; a thirteenth parameter, indicating the code rate offset of the second-order SCI; a fourteenth parameter, indicating the modulation order of the second-order SCI; a fifteenth parameter, indicating the code rate corresponding to the PSSCH; and a sixteenth parameter, indicating the number of REs remaining in the first PRB, wherein the first PRB is the PRB where the last modulation symbol of the second-order SCI is located.

[0248] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula:

[0249] Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, SCI2 Indicates the eleventh parameter, L SCI2 represents the twelfth parameter, represents the thirteenth parameter, represents the fourteenth parameter, R represents the fifteenth parameter, and γ represents the sixteenth parameter.

[0250] In some embodiments, the number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, and the first condition is associated with the first scaling factor.

[0251] In some embodiments, the first condition includes:

[0252] Q′ SCI2 -γ is less than or equal to

[0253] Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, γ represents the number of REs remaining in the first PRB, the first PRB is the PRB where the last modulation symbol of the second-order SCI is located, α represents the first scaling factor, Indicates the number of OFDM symbols available for sideline transmission in a time slot, Indicates the number of OFDM symbols occupied by PSFCH, Indicates the number of REs that can be used to map the second-order SCI on the lth OFDM symbol. The value of l ranges from 0 to

[0254] 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, and the second scaling factor is associated with SCI format 2-D.

[0255] In some embodiments, the second scaling factor is different from a 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.

[0256] In some embodiments, the second scaling factor is smaller than the first scaling factor.

[0257] In some embodiments, the SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

[0258] In some embodiments, the transceiver module 1810 may be a processor 1910. The terminal device 1800 may further include a transceiver 1930 and a memory 1920, as specifically shown in FIG19 .

[0259] Figure 19 is a schematic structural diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 19 indicate that the unit or module is optional. The device 1900 can be used to implement the method described in the above method embodiment. The device 1900 can be a chip or a terminal device.

[0260] The device 1900 may include one or more processors 1910. The processor 1910 may support the device 1900 to implement the method described in the above method embodiment. 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 another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0261] The apparatus 1900 may further include one or more memories 1920. The memories 1920 store programs that can be executed by the processor 1910, causing the processor 1910 to perform the methods described in the above method embodiments. The memories 1920 may be independent of the processor 1910 or integrated into the processor 1910.

[0262] The apparatus 1900 may further include a transceiver 1930. The processor 1910 may communicate with other devices or chips via the transceiver 1930. For example, the processor 1910 may transmit and receive data with other devices or chips via the transceiver 1930.

[0263] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device provided in the present application, and the program enables a computer to execute the method performed by the terminal device in each embodiment of the present application.

[0264] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the present application, and the program causes a computer to execute the method performed by the terminal device in each embodiment of the present application.

[0265] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal device provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the terminal device in each embodiment of the present application.

[0266] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0267] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0268] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0269] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0270] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0271] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0272] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0273] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0274] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0275] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0276] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0277] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0278] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0279] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for wireless communication, characterized in that: include: The terminal device sends or receives a first PSSCH in a first time slot, wherein the first time slot is also used to transmit a first reference signal, and the first reference signal is used for side positioning.

2. The method according to claim 1, characterized in that The TBS of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal.

3. The method according to claim 2, characterized in that The first parameter is associated with the first reference signal, including: 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.

4. The method according to claim 3, characterized in that The first parameter is indicated based on first information, and the first information is carried in a second-order SCI associated with the first PSSCH.

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

6. The method according to any one of claims 3 to 5, characterized in that The TBS of the second PSSCH is the same as the TBS of the first PSSCH, wherein the TBs transmitted by the second PSSCH and the first PSSCH are the same.

7. The method according to claim 6, characterized in that The second PSSCH does not transmit a reference signal for sideline positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

8. The method according to claim 7, characterized in that The second-order SCI associated with the second PSSCH includes second information, and the second information is used to determine the TBS of the second PSSCH.

9. The method according to claim 8, characterized in that: If the value of the second information is the first value, 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, 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.

10. The method according to any one of claims 7 to 9, characterized in that The second-order SCI associated with the second PSSCH includes third information, where the third information is used to indicate the number of OFDM symbols occupied by the reference signal used for sideline positioning, and the number of OFDM symbols indicated by the third information is 0.

11. The method according to claim 6, characterized in that The second PSSCH does not transmit a reference signal for sideline 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. The method according to any one of claims 6 to 11, characterized in that 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 value of the NDI indicated by the second-order SCI associated with the second PSSCH is the same as the value of the NDI indicated by the second-order SCI associated with the first PSSCH.

13. The method according to claim 2, characterized in that The first parameter is associated with the first reference signal, including: The first parameter is a reference value of the number of OFDM symbols used for the first reference signal; or, The first parameter is determined based on one or more resources used for sending the first reference signal in a time slot.

14. The method according to claim 13, characterized in that The second-order SCI associated with the first PSSCH includes a first indication field, and the first indication field is used to indicate the first parameter.

15. The method according to claim 14, characterized in that The number of bits occupied by the first indication field is associated with the number of OFDM symbols used for the first reference signal.

16. The method according to claim 15, characterized in that The number of OFDM symbols used for the first reference signal has A values, and the number of bits occupied by the first indication field is Wherein, A is a positive integer greater than or equal to 1.

17. The method according to claim 14, characterized in that The first indication field occupies 1 bit, and the 1 bit 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.

18. The method according to claim 13, characterized in that The first parameter is indicated by the first PSSCH sending device to the first PSSCH receiving device through high-layer signaling.

19. The method according to claim 18, characterized in that The high-layer signaling includes SLPP signaling or RRC signaling.

20. The method according to any one of claims 13 to 19, characterized in that The TBS of the first PSSCH is determined based on a second parameter, and the second parameter is determined based on the first parameter; wherein the second parameter represents a reference value of the number of REs that can be used for PSSCH within a PRB.

21. The method according to claim 20, characterized in that The second parameter is also determined based on one or more of the following: The third parameter indicates the number of subcarriers in a PRB; The fourth parameter indicates the number of OFDM symbols available for sideline transmission in a time slot; The fifth parameter represents the reference value of the number of OFDM symbols occupied by PSFCH; A sixth parameter indicates a reference value of the number of REs occupied by the PT-RS and / or CSI-RS; as well as The seventh parameter indicates the average number of DMRS REs in a time slot.

22. The method according to claim 21, characterized in that The second parameter satisfies the following formula: in, represents the first parameter, N′ RE represents the second parameter, represents the third parameter, represents the fourth parameter, represents the fifth parameter, represents the sixth parameter, represents the seventh parameter.

23. The method according to claim 1, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot.

24. The method according to claim 23, characterized in that 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 included in the resources used for the first reference signal in the time slot.

25. The method according to claim 23 or 24, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, and the eighth parameter is determined based on one or more of the following: A value determined according to the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot; The ninth parameter indicates the number of OFDM symbols available for sideline transmission in a time slot; as well as The tenth parameter indicates the number of OFDM symbols occupied by PSFCH.

26. The method according to claim 25, characterized in that The eighth parameter satisfies the following formula: in, represents the eighth parameter, represents the ninth parameter, represents the tenth parameter, It represents a value determined according to the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot.

27. The method according to claim 1, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH is not determined based on a first proportionality factor, and the first proportionality factor is a parameter configured by high-layer signaling for determining the number of REs occupied by the second-order SCI.

28. The method according to claim 27, characterized in that 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: The eleventh parameter indicates the number of bits contained in the second-order SCI; The twelfth parameter indicates the CRC length of the second-order SCI; The thirteenth parameter indicates the code rate offset of the second-order SCI; The fourteenth parameter represents the modulation order of the second-order SCI; The fifteenth parameter indicates the code rate corresponding to PSSCH; as well as The sixteenth parameter indicates the number of REs remaining in the first PRB, where the first PRB is the PRB where the last modulation symbol of the second-order SCI is located.

29. The method according to any one of claims 28, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula: Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, SCI2 represents the eleventh parameter, L SCI2 represents the twelfth parameter, represents the thirteenth parameter, represents the fourteenth parameter, R represents the fifteenth parameter, and γ represents the sixteenth parameter.

30. The method according to any one of claims 27 to 29, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, and the first condition is associated with the first proportional factor.

31. The method according to claim 30, characterized in that The first condition includes: Q′ SCI2 -γ is less than or equal to Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, γ represents the number of REs remaining in the first PRB, the first PRB is the PRB where the last modulation symbol of the second-order SCI is located, α represents the first scaling factor, Indicates the number of OFDM symbols available for sideline transmission in a time slot. Indicates the number of OFDM symbols occupied by PSFCH, It indicates the number of REs that can be used to map the second-order SCI on the lth OFDM symbol. The value of l ranges from 0 to 32. The method according to claim 1, characterized in that 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 SCI format 2-D.

33. The method according to claim 32, characterized in that 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.

34. The method according to claim 33, characterized in that The second scaling factor is smaller than the first scaling factor.

35. The method according to any one of claims 23 to 34, characterized in that The SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

36. A terminal device, characterized in that: include: 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, and the first reference signal is used for side positioning.

37. The device according to claim 36, characterized in that The TBS of the first PSSCH is determined based on a first parameter, and the first parameter is associated with the first reference signal.

38. The device according to claim 37, characterized in that The first parameter is associated with the first reference signal, including: 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.

39. The device according to claim 38, characterized in that The first parameter is indicated based on first information, and the first information is carried in a second-order SCI associated with the first PSSCH.

40. The device according to claim 39, characterized in that The format of the second-order SCI is SCI format 2-D.

41. Apparatus according to any one of claims 38 to 40, characterised in that The TBS of the second PSSCH is the same as the TBS of the first PSSCH, wherein the TBs transmitted by the second PSSCH and the first PSSCH are the same.

42. The device according to claim 41, characterized in that The second PSSCH does not transmit a reference signal for sideline positioning, and the SCI format of the second-order SCI associated with the second PSSCH is SCI format 2-D.

43. The device according to claim 42, characterized in that The second-order SCI associated with the second PSSCH includes second information, and the second information is used to determine the TBS of the second PSSCH.

44. The device according to claim 43, characterized in that: If the value of the second information is the first value, 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, 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.

45. Apparatus according to any one of claims 42 to 44, characterised in that The second-order SCI associated with the second PSSCH includes third information, where the third information is used to indicate the number of OFDM symbols occupied by the reference signal used for sideline positioning, and the number of OFDM symbols indicated by the third information is 0.

46. ​​The apparatus according to claim 41, characterized in that The second PSSCH does not transmit a reference signal for sideline 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.

47. Apparatus according to any one of claims 41 to 46, characterised in that 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 value of the NDI indicated by the second-order SCI associated with the second PSSCH is the same as the value of the NDI indicated by the second-order SCI associated with the first PSSCH.

48. The apparatus according to claim 37, characterized in that The first parameter is associated with the first reference signal, including: The first parameter is a reference value of the number of OFDM symbols used for the first reference signal; or, The first parameter is determined based on one or more resources used for sending the first reference signal in a time slot.

49. The device according to claim 48, characterized in that The second-order SCI associated with the first PSSCH includes a first indication field, and the first indication field is used to indicate the first parameter.

50. The apparatus according to claim 49, characterized in that The number of bits occupied by the first indication field is associated with the number of OFDM symbols used for the first reference signal.

51. The device according to claim 50, characterized in that The number of OFDM symbols used for the first reference signal has A values, and the number of bits occupied by the first indication field is Wherein, A is a positive integer greater than or equal to 1.

52. The apparatus according to claim 49, characterized in that The first indication field occupies 1 bit, and the 1 bit 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.

53. The apparatus according to claim 48, characterized in that The first parameter is indicated by the first PSSCH sending device to the first PSSCH receiving device through high-layer signaling.

54. The device according to claim 53, characterized in that The high-layer signaling includes SLPP signaling or RRC signaling.

55. Apparatus according to any one of claims 48 to 54, characterised in that The TBS of the first PSSCH is determined based on a second parameter, and the second parameter is determined based on the first parameter; wherein the second parameter represents a reference value of the number of REs that can be used for PSSCH within a PRB.

56. The device according to claim 55, characterized in that The second parameter is also determined based on one or more of the following: The third parameter indicates the number of subcarriers in a PRB; The fourth parameter indicates the number of OFDM symbols available for sideline transmission in a time slot; The fifth parameter represents the reference value of the number of OFDM symbols occupied by PSFCH; A sixth parameter indicates a reference value of the number of REs occupied by the PT-RS and / or CSI-RS; as well as The seventh parameter indicates the average number of DMRS REs in a time slot.

57. The device according to claim 56, characterized in that The second parameter satisfies the following formula: in, represents the first parameter, N′ RE represents the second parameter, represents the third parameter, represents the fourth parameter, represents the fifth parameter, represents the sixth parameter, represents the seventh parameter.

58. The apparatus of claim 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 included in one or more resources used for the first reference signal in a time slot.

59. The device according to claim 58, characterized in that 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 included in the resources used for the first reference signal in the time slot.

60. The apparatus according to claim 58 or 59, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH is determined based on an eighth parameter, and the eighth parameter is determined based on one or more of the following: A value determined according to the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot; The ninth parameter indicates the number of OFDM symbols available for sideline transmission in a time slot; as well as The tenth parameter indicates the number of OFDM symbols occupied by PSFCH.

61. The device according to claim 60, characterized in that The eighth parameter satisfies the following formula: in, represents the eighth parameter, represents the ninth parameter, represents the tenth parameter, It represents a value determined according to the number of OFDM symbols included in one or more resources used for the first reference signal in a time slot.

62. The apparatus according to claim 36, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH is not determined based on a first proportionality factor, and the first proportionality factor is a parameter configured by high-layer signaling for determining the number of REs occupied by the second-order SCI.

63. The device according to claim 62, characterized in that 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: The eleventh parameter indicates the number of bits contained in the second-order SCI; The twelfth parameter indicates the CRC length of the second-order SCI; The thirteenth parameter indicates the code rate offset of the second-order SCI; The fourteenth parameter represents the modulation order of the second-order SCI; The fifteenth parameter indicates the code rate corresponding to PSSCH; as well as The sixteenth parameter indicates the number of REs remaining in the first PRB, where the first PRB is the PRB where the last modulation symbol of the second-order SCI is located.

64. The apparatus according to any one of claims 63, characterized in that The number of REs occupied by the second-order SCI associated with the first PSSCH satisfies the following formula: Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, SCI2 represents the eleventh parameter, L SCI2 represents the twelfth parameter, represents the thirteenth parameter, represents the fourteenth parameter, R represents the fifteenth parameter, and γ represents the sixteenth parameter.

65. Apparatus according to any one of claims 62 to 64, characterised in that The number of REs occupied by the second-order SCI associated with the first PSSCH satisfies a first condition, and the first condition is associated with the first proportional factor.

66. The device according to claim 65, characterized in that The first condition includes: Q′ SCI2 -γ is less than or equal to Among them, Q′ SCI2 represents the number of REs occupied by the second-order SCI associated with the first PSSCH, γ represents the number of REs remaining in the first PRB, the first PRB is the PRB where the last modulation symbol of the second-order SCI is located, α represents the first scaling factor, Indicates the number of OFDM symbols available for sideline transmission in a time slot. Indicates the number of OFDM symbols occupied by PSFCH, It indicates the number of REs that can be used to map the second-order SCI on the lth OFDM symbol. The value of l ranges from 0 to 67. The apparatus of claim 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, and the second scaling factor is associated with SCI format 2-D.

68. The device according to claim 67, characterized in that 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.

69. The device according to claim 68, characterized in that The second scaling factor is smaller than the first scaling factor.

70. Apparatus according to any one of claims 58 to 69, characterised in that The SCI format of the second-order SCI associated with the first PSSCH is SCI format 2-D.

71. A terminal device, characterized in that: It comprises a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method as described in any one of claims 1-35.

72. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to cause the device to execute a method as claimed in any one of claims 1 to 35.

73. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 35.

74. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 35.

75. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 35.

76. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 35.

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