Wireless communication method, terminal device and network device

Abstract

A wireless communication method, a terminal device and a network device, the method comprising: a terminal device sending an SL PRS and / or a physical channel according to one or more SL PRS resources configured in a time slot, the physical channel being used for indicating the sending of the SL PRS, the SL PRS resource corresponds to one or more initial orthogonal frequency division multiplexing (OFDM) symbol positions which can be used for sending the SL PRS.

Description

Wireless communication method, terminal device and network device Technical Field

[0001] The embodiments of the present application relate to the field of communications, and specifically to a wireless communication method, terminal device, and network device. Background Art

[0002] In some scenarios, in order to improve positioning accuracy, especially to achieve positioning of terminal devices located outside the coverage of a cellular network, positioning based on sidelink (SL) positioning reference signals (PRS) is introduced.

[0003] In the unlicensed spectrum, the terminal device accesses the channel through Listen Before Talk (LBT), so the time for the terminal device to complete LBT is uncertain. If the terminal device fails to complete LBT before the SL PRS resource, it will miss the transmission opportunity. Therefore, how to perform SL PRS transmission or SL PRS scheduling is an urgent problem to be solved.

[0004] Summary of the Invention

[0005] The present application provides a wireless communication method, terminal device, and network device, which are conducive to increasing the probability of SL PRS transmission on unlicensed spectrum, thereby improving positioning accuracy.

[0006] In a first aspect, a method for wireless communication is provided, comprising: a terminal device sends a SL PRS and / or a physical channel according to one or more side positioning reference signal SL PRS resources configured in a time slot, wherein the physical channel is used to indicate the sending of the SL PRS, wherein the SL PRS resources correspond to one or more starting orthogonal frequency division multiplexing OFDM symbol positions that can be used to send the SL PRS.

[0007] According to a second aspect, a method for wireless communication is provided, comprising: a terminal device sends a side positioning reference signal SL PRS according to a side positioning reference signal SL PRS resource configured in a time slot; and sends a physical channel according to a physical channel resource configured in a time slot, wherein the physical channel is used to indicate the sending of the SL PRS; wherein the physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing OFDM symbol positions that can be used to send the physical channel, and the SL PRS resource is after the physical channel resource; or the SL PRS resource is configured with a plurality of starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

[0008] According to a third aspect, a method for wireless communication is provided, comprising: a network device configures one or more side positioning reference signal (SL PRS) resources within a time slot for a terminal device, wherein the one or more SL PRS resources are used by the terminal device to send SL PRS and / or a physical channel, and the physical channel is used to indicate the sending of the SL PRS, wherein the SL PRS resources correspond to one or more starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send SL PRS.

[0009] In a fourth aspect, a method for wireless communication is provided, including: a network device configures a side positioning reference signal SL PRS resource and a physical channel resource within a time slot for a terminal device, wherein the physical channel resource is configured with multiple starting orthogonal frequency division multiplexing OFDM symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or the SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send a SL PRS, and the physical channel resource is after the SL PRS resource.

[0010] In a fifth aspect, a terminal device is provided for executing the method in any one of the first to second aspects or their respective implementations. Specifically, the terminal device includes a functional module for executing the method in any one of the first to second aspects or their respective implementations.

[0011] In a sixth aspect, a network device is provided for executing the method in any one of the third to fourth aspects or their respective implementations. Specifically, the network device includes a functional module for executing the method in any one of the third to fourth aspects or their respective implementations.

[0012] In a seventh aspect, a terminal device is provided, comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the method of any one of the first to second aspects or their respective implementations.

[0013] In an eighth aspect, a network device is provided, comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the method of any one of the third to fourth aspects or their respective implementations.

[0014] In a ninth aspect, a chip is provided for implementing the method described in any one of the first to fourth aspects or their respective implementations. Specifically, the chip includes a processor configured to retrieve and execute a computer program from a memory, causing a device equipped with the chip to perform the method described in any one of the first to fourth aspects or their respective implementations.

[0015] In a tenth aspect, a computer-readable storage medium is provided for storing a computer program, which enables a computer to execute the method of any one of the first to fourth aspects or its various implementations.

[0016] In an eleventh aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method of any one of the first to fourth aspects or any of their implementations.

[0017] In the twelfth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the above-mentioned first to fourth aspects or their respective implementations.

[0018] Through the above technical solution, one or more resources are configured in the time slot, and the resources correspond to one or more starting OFDM symbol positions that can be used to send SL PRS and / or physical channels. The terminal device can start sending SL PRS and / or physical channels from the starting OFDM symbol positions that can be used to send SL PRS and / or physical channels corresponding to the one or more resources, which is beneficial to increase the probability of SL PRS transmission on the unlicensed spectrum and improve the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

[0020] FIG2 is a schematic diagram of another communication system architecture provided in an embodiment of the present application.

[0021] FIG3 is a schematic diagram of a time slot structure in NR-V2X.

[0022] FIG4 is a schematic diagram of another time slot structure in NR-V2X.

[0023] FIG5 is a schematic diagram of the time domain positions of four DMRS symbols when the number of PSSCH symbols is 13.

[0024] FIG6 is a schematic diagram of a DMRS port pattern.

[0025] FIG7 is a schematic diagram of the frequency domain range of a PSCCH and PSSCH resource pool.

[0026] FIG8 is a schematic diagram of a subframe structure of an NR system.

[0027] FIG9 is a schematic diagram of a method for determining time domain resources in an NR-V2X system.

[0028] FIG10 is a schematic diagram of an interleaved resource block.

[0029] FIG11 is a schematic diagram of a frame structure based on interleaved resource blocks.

[0030] FIG12 is a schematic diagram of an RB set.

[0031] FIG13 is a schematic interaction diagram of a wireless communication method provided according to an embodiment of the present application.

[0032] FIG14 is a schematic diagram of resources according to an embodiment of the present application.

[0033] FIG15 is a schematic diagram of RE offset of resources according to an embodiment of the present application.

[0034] FIG16 is a schematic diagram of resources according to another embodiment of the present application.

[0035] Figure 17 is a schematic interaction diagram of a wireless communication method provided according to an embodiment of the present application.

[0036] Figure 18 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0037] Figure 19 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

[0038] Figure 20 is a schematic block diagram of a network device provided according to an embodiment of the present application.

[0039] Figure 21 is a schematic block diagram of a network device provided according to an embodiment of the present application.

[0040] Figure 22 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0041] Figure 23 is a schematic block diagram of a chip provided according to an embodiment of the present application.

[0042] Figure 24 is a schematic block diagram of a communication system provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. With respect to the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0045] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0046] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0047] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as an unshared spectrum.

[0048] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0049] The terminal device can be a station (ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0050] In an embodiment of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0051] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0052] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0053] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device or base station (gNB) in an NR network, or a network device in a future evolved PLMN network or a network device in an NTN network, etc.

[0054] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0055] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0056] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0057] The terms used in the embodiments of this application are intended only to explain the specific embodiments of this application and are not intended to limit this application. The terms "first," "second," "third," and "fourth," etc. in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions.

[0058] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0059] In the description of 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 being indicated, configuration and being configured, etc.

[0060] 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.

[0061] 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.

[0062] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0063] Figure 1 is a schematic diagram of a communication system applicable to embodiments of the present application. Transmission resources for vehicle-mounted terminals (vehicle-mounted terminal 121 and vehicle-mounted terminal 122) are allocated by base station 110. The vehicle-mounted terminals transmit data on the sidelink based on the resources allocated by base station 110. Specifically, base station 110 can allocate resources for a single transmission to a terminal, or it can allocate resources for semi-static transmission to the terminal.

[0064] Figure 2 is a schematic diagram of another communication system applicable to an embodiment of the present application. Vehicle-mounted terminals (vehicle-mounted terminal 131 and vehicle-mounted terminal 132) autonomously select transmission resources on the sidelink for data transmission. Alternatively, the vehicle-mounted terminals can select transmission resources randomly or through interception.

[0065] Unlicensed spectrum (also known as shared spectrum or license-exempt spectrum) is a spectrum divided by countries and regions that can be used for radio equipment communications. This spectrum is generally considered to be shared spectrum, that is, as long as communication equipment in different communication systems meets the regulatory requirements set by the country or region on this spectrum, they can use this spectrum without applying for exclusive spectrum authorization from the government.

[0066] In the NR-V2X system, the Physical Sidelink Shared Channel (PSSCH) and its associated Physical Sidelink Control Channel (PSCCH) are transmitted in the same time slot. The PSCCH occupies two or three Orthogonal Frequency-Division Multiplexing (OFDM) symbols. NR-V2X time domain resource allocation uses time slots as the granularity. The starting point and length of the OFDM symbol used for sidelink transmission in a time slot are configured by the parameters sidelink start symbol (sl-startSLsymbols) and sidelink symbol length (sl-lengthSLsymbols). The last OFDM symbol in this part of symbols is used as the guard period (GP). PSSCH and PSCCH can only use the remaining OFDM symbols. However, if the transmission resources of the physical sidelink feedback channel (PSFCH) are configured in a time slot, PSSCH and PSCCH cannot occupy the OFDM symbol used for PSFCH transmission, as well as the automatic gain control (AGC) and GP symbols before the OFDM symbol.

[0067] As shown in Figure 3, the network configuration sl-StartSymbol=3, sl-LengthSymbols=11, that is, the 11 OFDM symbols starting from symbol index 3 in a time slot can be used for sideline transmission. There are PSFCH transmission resources in the time slot. The PSFCH occupies OFDM symbol 11 and OFDM symbol 12, among which OFDM symbol 11 is used as the AGC symbol of PSFCH, and OFDM symbols 10 and 13 are used as GPs respectively. The OFDM symbols that can be used for PSSCH transmission are symbol 3 to symbol 9, and PSCCH occupies 3 OFDM symbols, namely symbols 3, 4, and 5. Symbol 3 is usually used as an AGC symbol.

[0068] In NR-V2X, in addition to PSCCH and PSSCH, PSFCH may also exist in a sidelink time slot, as shown in Figure 4. It can be seen that in a time slot, the first OFDM symbol is fixed for AGC. On the AGC symbol, the UE copies the information sent on the second OFDM symbol. At the end of the time slot, there is an OFDM symbol reserved for transceiver conversion, which is used for the UE to switch from the transmit (or receive) state to the receive (or transmit) state. In the remaining OFDM symbols, PSCCH can occupy two or three OFDM symbols starting from the second OFDM symbol. In the frequency domain, the number of physical resource blocks (PRBs) occupied by PSCCH is within the subband range of a PSSCH. If the number of PRBs occupied by PSCCH is less than the size of a subchannel of PSSCH, or the frequency domain resources of PSSCH include multiple subchannels, then PSCCH can be frequency-division multiplexed with PSSCH on the OFDM symbol where PSCCH is located.

[0069] The PSSCH demodulation reference signal (DMRS) in NR-V2X draws on the design of the Uu interface in the NR system and adopts multiple time-domain PSSCH DMRS patterns. Within a resource pool, the number of available DMRS patterns is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol within the pattern are shown in Table 1. Figure 5 shows a schematic diagram of the time-domain position of four DMRS symbols when the PSSCH has 13 symbols.

[0070] Table 1

[0071]

[0072]

[0073] If multiple time-domain DMRS patterns are configured in the resource pool, the specific time-domain DMRS pattern to be used can be selected by the transmitting UE and indicated in the first-order Sidelink Control Information (SCI). This design allows UEs moving at high speeds to select a high-density DMRS pattern, thereby ensuring channel estimation accuracy, while UEs moving at low speeds can use a low-density DMRS pattern, thereby improving spectrum efficiency.

[0074] 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 CRC bit of the PSCCH that schedules the PSSCH, where L=24 is the number of bits of the PSCCH CRC.

[0075] In the NR system, PDSCH and PUSCH support two frequency domain DMRS patterns, 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, single symbol DMRS frequency domain type 2 can support 6 DMRS ports, and in the case of double DMRS symbols, the number of supported ports is doubled. However, in NR-V2X, since PSSCH only needs to support a maximum of two DMRS ports, only single symbol DMRS frequency domain type 1 is supported, as shown in Figure 6.

[0076] Similar to LTE-V2X, the frequency domain resources in the NR-V2X resource pool are contiguous, and the frequency domain resource allocation granularity is also subchannel. The number of PRBs included in a subchannel is {10, 12, 15, 20, 50, 75, 100}. The minimum subchannel size is 10 PRBs, which is much larger than the minimum subchannel size of 4 PRBs in LTE-V2X. This is mainly because the frequency domain resources of the PSCCH in NR-V2X are located in the first subchannel of its associated PSSCH. The frequency domain resources of the PSCCH are less than or equal to the size of a PSSCH subchannel, while the time domain resources of the PSCCH occupy two or three OFDM symbols. If the subchannel size is configured too small, the available PSCCH resources will be limited, the code rate will increase, and the detection performance of the PSCCH will be reduced. In NR-V2X, the PSSCH subchannel size and the PSCCH frequency domain resource size are configured independently, but the PSCCH frequency domain resources must be less than or equal to the PSSCH subchannel size. The following configuration parameters in the NR-V2X resource pool configuration information are used to determine the frequency domain resources of the PSCCH and PSSCH resource pools:

[0077] Subchannel size (sl-SubchannelSize): indicates the number of consecutive PRBs included in a subchannel in the resource pool, and the value range is {10, 12, 15, 20, 50, 75, 100} PRBs;

[0078] Number of subchannels (sl-NumSubchannel): indicates the number of subchannels included in the resource pool;

[0079] Subchannel start RB index (sl-StartRB-Subchannel): indicates the start PRB index of the first subchannel in the resource pool;

[0080] PRB number (sl-RB-Number): indicates the number of consecutive PRBs included in the resource pool;

[0081] PSCCH frequency domain resource indication (sl-FreqResourcePSCCH): indicates the frequency domain resource size of PSCCH, and the value range is {10, 12, 15, 20, 25} PRB;

[0082] When the UE determines the resource pool for PSSCH transmission or PSSCH reception, the frequency domain resources included in the resource pool are sl-NumSubchannel consecutive subchannels starting from the PRB indicated by sl-StartRB-Subchannel. If the number of PRBs contained in the final sl-NumSubchannel consecutive subchannels is less than the number of PRBs indicated by sl-RB-Number, the remaining PRBs cannot be used for PSSCH transmission or reception.

[0083] In NR-V2X, the frequency domain starting position of the first subchannel of the PSCCH and its associated PSSCH is aligned. Therefore, the starting position of each PSSCH subchannel is the possible frequency domain starting position of the PSCCH. The frequency domain range of the resource pool of PSCCH and PSSCH can be determined according to the above parameters, as shown in Figure 7.

[0084] In NR-V2X, the PSCCH is used to carry side control information related to resource sensing, including:

[0085] The priority of the scheduled transmission;

[0086] Frequency domain resource allocation information, indicating the number of frequency domain resources of the PSSCH in the current time slot scheduled by the PSCCH, and the number and starting position of the frequency domain resources of a maximum of two retransmission resources reserved;

[0087] Time domain resource allocation information, indicating the time domain locations of up to two retransmission resources;

[0088] Reference signal pattern for PSSCH;

[0089] Second level SCI format;

[0090] Second-order SCI rate offset;

[0091] Number of PSSCH DMRS ports;

[0092] Modulation and coding scheme MCS;

[0093] MCS form instructions;

[0094] Number of PSFCH symbols;

[0095] Resource reservation period, reserves resources for transmission by another TB in the next period. If inter-TB resource reservation is not activated in the resource pool configuration, this information bit field does not exist.

[0096] Reserved bits: 2 to 4 bits. The specific number of bits is configured or pre-configured by the network.

[0097] Since the PSCCH is always transmitted in the same time slot as the scheduled PSSCH, and the starting position of the PRB occupied by the PSCCH is the starting position of the first subchannel of the scheduled PSSCH, the SCI format 1-A does not explicitly indicate the time-frequency domain starting position of the scheduled PSSCH.

[0098] In NR-V2X, the transmission of PSCCH / PSSCH is based on the time slot level, that is, only one PSCCH / PSSCH can be transmitted in one time slot. It does not support the transmission of multiple PSCCH / PSSCH in one time slot through time division multiplexing (TDM). The PSCCH / PSSCH between different users can be multiplexed in one time slot through frequency division multiplexing (FDM). The time domain resources of PSSCH in NR-V2X are based on time slot granularity, but unlike the PSSCH in LTE-V2X that occupies all the time domain symbols in a subframe, the PSSCH in NR-V2X can occupy part of the symbols in a time slot. This is mainly because in the LTE system, uplink or downlink transmissions are also based on subframe granularity, so side transmissions are also based on subframe granularity (special subframes in the TDD system are not used for side transmissions). The NR system uses a flexible time slot structure, that is, a time slot includes both uplink and downlink symbols, which can achieve more flexible scheduling and reduce latency. A typical NR system subframe is shown in Figure 8. A time slot can include downlink (DL) symbols, uplink (UL) symbols, and flexible symbols. Downlink symbols are located at the beginning of the time slot, and uplink symbols are located at the end of the time slot. There are flexible symbols between the downlink and uplink symbols. The number of various symbols in each time slot is configurable.

[0099] The sidelink transmission system can share a carrier with the cellular system. In this case, sidelink transmission can only use the cellular system's uplink transmission resources. For NR-V2X, if sidelink transmission still needs to occupy all time-domain symbols in a timeslot, the network must configure a timeslot full of uplink symbols for sidelink transmission. This will significantly impact the uplink and downlink data transmission of the NR system and reduce system performance. Therefore, NR-V2X supports the use of a portion of the time-domain symbols in a timeslot for sidelink transmission, that is, a portion of the uplink symbols in a timeslot are used for sidelink transmission. In addition, considering that sidelink transmission includes AGC symbols and GP symbols, if the number of uplink symbols available for sidelink transmission is small, removing AGC symbols and GP symbols will leave even fewer symbols available for transmitting valid data, resulting in low resource utilization. Therefore, in NR-V2X, the minimum number of time-domain symbols occupied by sidelink transmission is seven (including GP symbols). When the sidelink transmission system uses a dedicated carrier, there is no issue of sharing transmission resources with other systems, and all symbols in the timeslot can be configured for sidelink transmission.

[0100] In the NR-V2X system, the time domain resources of the resource pool are also indicated by a bitmap. Considering the flexible time slot structure in the NR system, the length of the bitmap has been extended to support a bitmap length range of [10:160]. The method of using the bitmap to determine the time slot position belonging to the resource pool within a system frame number (SFN) period is the same as in LTE-V2X, but with the following two differences:

[0101] 1. The total number of time slots included in an SFN cycle is 10240×2 μ , where the parameter μ is related to the subcarrier spacing;

[0102] 2. If at least one of the time-domain symbols Y, Y+1, Y+2, …, Y+X-1 included in a time slot is not configured as an uplink symbol by the network's TDD-UL-DL-ConfigCommon signaling, then the time slot cannot be used for sidelink transmission. Where Y and X represent sl-StartSymbol and sl-LengthSymbols, respectively.

[0103] The specific steps include:

[0104] Step 1: Remove the time slots that do not belong to the resource pool within the SFN cycle, including synchronization time slots and time slots that cannot be used for sideline transmission. The remaining time slots are represented as the remaining time slot set, and the remaining time slots are renumbered as

[0105] Among them, N S_SSBIndicates the number of synchronization time slots in an SFN cycle; the synchronization time slot is determined according to the synchronization-related configuration parameters (see Section 5.4), and is related to the SSB transmission cycle and the number of SSB transmission resources configured in the cycle.

[0106] N nonSL Indicates the number of time slots in an SFN cycle that do not comply with the uplink symbol start point and number configuration: If at least one of the time domain symbols Y, Y+1, Y+2, …, Y+X-1 included in a time slot is not semi-statically configured as an uplink symbol, then the time slot cannot be used for sidelink transmission, where Y and X represent sl-StartSymbol and sl-LengthSymbols, respectively.

[0107] Step 2: Determine the number of reserved time slots and the corresponding time domain positions.

[0108] If the number of time slots in the remaining time slot set cannot be divided by the bitmap length, the number of reserved time slots and the corresponding time domain positions need to be determined. r (0≤r<10240×2 μ -N S_SSB -N nonSL ) satisfies the following conditions, then the time slot is a reserved time slot:

[0109]

[0110] Among them, N reserved =(10240×2 μ -N S_SSB -N nonSL )modL bitmap , represents the number of reserved time slots,

[0111] L bitmap Indicates the length of the bitmap, m = 0, ..., N reserved -1.

[0112] Step 3: Remove the reserved time slots from the remaining time slot set. The remaining time slot set is represented as a logical time slot set. The time slots in the time slot set are all time slots that can be used in the resource pool. The time slots in the logical time slot set are renumbered as Among them, T max =10240×2 μ -N S_SSB -N nonSL -N reserved .

[0113] Step 4: Determine the time slots in the logical time slot set that belong to the resource pool according to the bitmap.

[0114] The bitmap in the resource pool configuration information is For a time slot in a logical time slot set When bk′=1, the time slot belongs to the resource pool, where k′=k mod L bitmap .

[0115] Step 5: Renumber the time slots belonging to the resource pool determined in step 4 in order Among them, T′ max Indicates the number of time slots included in the resource pool.

[0116] As shown in Figure 9, an SFN cycle (or DFN cycle) includes 10240 subframes. The period of the synchronization signal is 160 ms. Two synchronization subframes are included in one synchronization cycle. Therefore, there are a total of 128 synchronization subframes in one SFN cycle. The length of the bitmap used to indicate the time domain resources of the resource pool is 10 bits. Therefore, two reserved subframes are required. The number of remaining subframes is (10240-128-2=10110), which is divisible by the length of the bitmap of 10. The remaining subframes are renumbered as 0, 1, 2, ..., 10109. The first three bits of the bitmap are 1, and the remaining seven bits are 0. That is, among the remaining subframes, the first three subframes in every 10 subframes belong to the resource pool, and the remaining subframes do not belong to the resource pool. Since the bitmap needs to be repeated 1011 times in the remaining subframes to indicate whether all subframes belong to the resource pool, and each bitmap period includes 3 subframes, a total of 3033 subframes belong to the resource pool in one SFN period.

[0117] 3GPP defines two transmission modes, which are respectively referred to as: a first mode (sidelink resource allocation mode 1) and a second mode (sidelink resource allocation mode 2).

[0118] Mode 1: The terminal's transmission resources are allocated by the base station, and the terminal transmits data on the sidelink based on the allocated resources. The base station can allocate resources for either single transmission or semi-static transmission. As shown in Figure 3, when the terminal is within network coverage, the network allocates transmission resources for sidelink transmission.

[0119] Mode 2: The terminal selects a resource from the resource pool for data transmission. As shown in Figure 5, if the terminal is outside the cell coverage area, it autonomously selects a transmission resource from the pre-configured resource pool for sideline transmission. Alternatively, as shown in Figure 3, the terminal autonomously selects a transmission resource from the network-configured resource pool for sideline transmission.

[0120] The second mode of resource selection is supported in NR-V2X, that is, the UE excludes the resources reserved by other UEs based on the PSCCH sent by other UEs detected, and selects resources for data transmission from the remaining resources.

[0121] The second mode resource selection is performed in two steps:

[0122] Step 1: The UE takes all available resources in the resource selection window as resource set A.

[0123] If the UE sends data in certain time slots within the listening window and does not listen, all resources in the corresponding time slots in the selection window for these time slots are excluded. The UE determines the corresponding time slots in the selection window using the value set of the "resource reservation period" field in the resource pool configuration used.

[0124] If the UE detects a PSCCH within the listening window, it measures the RSRP of the PSCCH or the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than the SL-RSRP threshold, and the reserved resources are determined to be within the resource selection window based on the resource reservation information in the sidelink control information transmitted in the PSCCH, the corresponding resources are excluded from set A. If the remaining resources in resource set A are less than X% of the total resources of resource set A before resource exclusion, the SL-RSRP threshold is raised by 3dB and step 1 is repeated. The possible values ​​of X are {20, 35, 50}, and the UE determines the parameter X from this value set based on the priority of the data to be transmitted. At the same time, the SL-RSRP threshold is related to the priority carried in the PSCCH detected by the UE and the priority of the data to be transmitted by the UE. The UE uses the remaining resources in set A after resource exclusion as the candidate resource set.

[0125] Step 2: The UE randomly selects several resources from the candidate resource set as the transmission resources for its initial transmission and retransmission.

[0126] In some scenarios, consider researching and developing sidelink positioning solutions to support the use cases, scenarios and requirements identified in these activities. In order to improve positioning accuracy, especially to achieve positioning of UEs outside the coverage of cellular networks, positioning based on sidelink positioning reference signals is introduced. Sidelink (SL) positioning reference signals (PRS) can be sent in a dedicated resource pool. However, in order to support sidelink positioning and sidelink communication, the UE also needs to send and receive UE mutual discovery information, configuration information, measurement reporting information related to sidelink positioning, and control and data information related to sidelink communication, etc., and this information needs to be carried through sidelink channels such as PSCCH and / or PSSCH.

[0127] When performing sidelink transmission over unlicensed spectrum (SL-U), sidelink transmission must meet specific regulatory requirements, including minimum occupied channel bandwidth (OCB) and maximum power spectral density (PSD). For OCB requirements, the UE must occupy no less than 80% of the channel bandwidth when using the channel for data transmission. For maximum power spectral density requirements, the UE's transmit power per 1MHz cannot exceed 10dBm. To meet OCB and PSD regulatory requirements, sidelink transmission over unlicensed spectrum must adopt an interlaced resource block (IRB) structure. An IRB consists of N discrete RBs in the frequency domain, with a total of M IRBs within the frequency band. The mth IRB consists of RBs in the order {m, M+m, 2M+m, 3M+m, ...}.

[0128] As shown in Figure 10, 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 intervals of two adjacent RBs belonging to the same IRB are the same, i.e., they are 5 RBs apart. The numbers in the boxes in the figure represent the IRB indexes.

[0129] 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. In this case, the frame structure of the SL-U system is shown in Figure 11, where the numbers within the boxes represent the IRB indexes. Figure 11 illustrates a frame structure where only the PSCCH and PSSCH are included in a time slot, excluding the PSFCH. The bandwidth shown in Figure 11 includes 20 RBs, with five IRB resources configured (i.e., M = 5). Each IRB resource consists of four RBs, and the numbers within the boxes represent the IRB indexes. In Figure 11, the system configures the PSCCH to occupy one IRB resource, occupying 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 11, PSSCH1 occupies IRB#0 and IRB#1, with its corresponding PSCCH1 occupying IRB#0. PSSCH2 occupies IRB#2, with its corresponding PSCCH2 also occupying IRB#2. It should be noted that, for the sake of simplicity, FIG11 does not show the resources occupied by the second-order SCI and the resources occupied by the PSCCH DMRS and PSSCH DMRS.

[0130] In the unlicensed spectrum, the UE accesses the channel through Listen Before Talk (LBT). LBT uses a granularity of 20 MHz in the frequency domain, and each 20 MHz is called an RB Set. A carrier can include multiple RB Sets, and there is a guard interval between RB Sets, as shown in Figure 12.

[0131] On the unlicensed spectrum, the UE needs to perform LBT first and can access the channel only after passing LBT. However, the time for the UE to complete LBT is uncertain. The UE may miss the transmission opportunity because it fails to complete LBT before the SL PRS resource. Therefore, how to perform SL PRS transmission or SL PRS scheduling is an urgent problem that needs to be solved.

[0132] FIG13 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG13 , the method 200 includes at least part of the following:

[0133] S210, the terminal device sends a side positioning reference signal SL PRS and / or a physical channel according to one or more resources configured in the time slot, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, or the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0134] Therefore, in an embodiment of the present application, there can be multiple starting OFDM symbol positions that can be used to send SL PRS and / or physical channels within a time slot (i.e., multiple allowed starting OFDM symbol positions that can be used to send SL PRS and / or physical channels). In this way, the terminal device can start sending SL PRS and / or physical channels at the nearest starting OFDM symbol position after LBT is successful, thereby increasing the probability of SL PRS transmission on the unlicensed spectrum and improving the positioning accuracy.

[0135] In some embodiments, the physical channel may include PSCCH and / or PSSCH.

[0136] In some embodiments, the one resource may include an SL PRS resource or a physical channel resource, the SL PRS resource may be used for sending an SL PRS, and the physical channel resource may be used for sending a physical channel.

[0137] In some other embodiments, the multiple resources may include multiple SL PRS resources or multiple physical channel resources, the SL PRS resources may be used for sending SL PRS, and the physical channel resources may be used for sending physical channels.

[0138] In some embodiments, the one or more resources may be pre-configured, or defined by a standard, or may be configured by a network device. For example, the method 200 further includes:

[0139] S201: A terminal device receives resource configuration information sent by a network device, where the resource configuration information is used to configure one or more resources.

[0140] The following describes the configuration of the one or more resources in conjunction with specific embodiments.

[0141] Embodiment 1: A plurality of resources are pre-configured or configured in a time slot, and each resource corresponds to (or is configured with) a starting OFDM symbol position that can be used to send an SL PRS and / or a physical channel.

[0142] In some embodiments, the multiple resources correspond to different starting OFDM symbol positions that can be used to send SL PRS and / or physical channels. That is, there are multiple starting OFDM symbol positions that can be used to send SL PRS and / or physical channels in a time slot. In other words, there are multiple starting OFDM symbol positions allowed for sending SL PRS and / or physical channels in a time slot.

[0143] For example, multiple SL PRS resources are pre-configured or configured in a time slot, and each SL PRS resource corresponds to a starting OFDM symbol position that can be used to send SL PRS. The starting OFDM symbol positions that can be used to send SL PRS corresponding to the multiple SL PRS resources are different. The terminal device can start sending SL PRS from the starting OFDM symbol position that can be used to send SL PRS corresponding to the multiple SL PRS resources.

[0144] For another example, multiple physical channel resources are pre-configured or configured within a time slot, and each physical channel resource corresponds to a starting OFDM symbol position that can be used to send a physical channel. The multiple physical channel resources correspond to different starting OFDM symbol positions that can be used to send a physical channel. The terminal device can start sending a physical channel from the starting OFDM symbol position that can be used to send a physical channel corresponding to the multiple physical channel resources.

[0145] In some embodiments, each resource among the multiple resources is determined according to corresponding resource configuration information, and the starting OFDM symbol positions determined according to the resource configuration information corresponding to the multiple resources are different.

[0146] For example, the multiple resources are multiple SL PRS resources, and each SL PRS resource is determined according to corresponding SL PRS resource configuration information.

[0147] As an example and not a limitation, the resource configuration information is used to configure but not limited to at least one of the following:

[0148] The starting OFDM symbol position of the resource, the number of OFDM symbols included in the resource (i.e., symbol length), the ending OFDM symbol position of the resource, the bandwidth of the resource, the comb size of the resource, the resource element (RE) offset of the resource, and the sequence identifier (ID) of the SL PRS.

[0149] In some embodiments, the resource configuration information is pre-configured, or configured by the network device, or pre-defined by a standard.

[0150] It should be understood that the configuration method of each parameter in the resource configuration information may be the same or different.

[0151] For example, some parameters in the resource configuration information are pre-configured, and other parameters are configured by the network device.

[0152] For another example, some parameters in the resource configuration information are defined by the standard, while other parameters are configured by the network device.

[0153] In some embodiments, the OFDM symbols included in the resource are consecutive or non - consecutive.

[0154] In some embodiments, the multiple resources overlap in the time domain.

[0155] For example, the starting OFDM symbol positions of the multiple resources are different, but the included OFDM symbol positions overlap.

[0156] As an example, resource x and resource y can be configured or pre - configured, where resource x includes OFDM symbols #a to #N, and resource y includes OFDM symbols #b to #N, where a < b < N ≤ K, and K is the total number of OFDM symbols in a time slot.

[0157] In a specific embodiment, as shown in FIG. 14, assuming there are 14 OFDM symbols in a time slot, i.e., OFDM symbols #0 to #13, and the last OFDM symbol #13 is used for transceiver conversion. Three SL PRS resources with different starting OFDM symbol positions can be configured in the time slot. For example, resource #0 starting from OFDM symbol #0 occupies OFDM symbols #0 to #12, resource #1 starting from OFDM symbol #4 occupies OFDM symbols #4 to #12, and resource #2 starting from OFDM symbol #8 occupies OFDM symbols #8 to #12.

[0158] In some embodiments, the bandwidth of the resource can be pre - configured, configured by a network device, defined by a standard, or can also default to the bandwidth of the resource pool.

[0159] In some embodiments, the comb - tooth size of the resource can refer to the interval between two adjacent resource elements (REs) used to transmit the same SL PRS or the same physical channel. For resources with different starting OFDM symbol positions, the comb - tooth size can be different. For example, in the example of FIG. 14, the comb - tooth size of resource #0 can be 12, the comb - tooth size of resource #1 can be 8, and the comb - tooth size of resource #2 can be 4.

[0160] In some embodiments, the RE offset of the resource can refer to the offset of the first RE on the first OFDM symbol used to transmit the SL PRS or the physical channel relative to the starting point of the physical resource block (PRB). The RE offset can be configured by a network device, pre - configured, or can also be determined by a terminal device. FIG. 15 is a schematic diagram of resources with a comb - tooth size of 2 and RE offsets of 0 and 1 respectively.

[0161] In some embodiments, the SL PRS sequence ID is used to generate the SL PRS sequence transmitted on the SL PRS resource.

[0162] In this embodiment 1, the terminal device can select resources at multiple different starting OFDM symbol positions within a time slot when performing resource selection. When the network device allocates resources to the terminal device, it can also allocate resources at multiple different starting OFDM symbol positions within a time slot to the same terminal device. After the LBT is successful, the terminal device can start sending SL PRS and / or physical channels on the resources at the earliest selected starting OFDM symbol position. For example, in the example of Figure 14, the terminal device can select resource #0, resource #1 and resource #2. If the terminal device completes LBT before OFDM symbol #3, the terminal device can start sending SL PRS and / or physical channels from the starting OFDM symbol position of resource #1.

[0163] For a receiving terminal, it can detect the SL PRS and / or physical channel sent by other terminal devices only from a configured or pre-configured starting OFDM symbol position, where the physical channel is used to indicate the sending of the SL PRS.

[0164] Embodiment 2: A resource is configured or pre-configured within a time slot, and the one resource corresponds to (or is configured with) a plurality of starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0165] For example, one SL PRS resource is configured or pre-configured in a time slot, and the one SL PRS resource corresponds to multiple starting OFDM symbol positions that can be used to send SL PRS.

[0166] For another example, one physical channel resource is configured or pre-configured in a time slot, and the one physical channel resource corresponds to a plurality of starting OFDM symbol positions that can be used to send physical channels.

[0167] In some embodiments, the multiple starting OFDM symbol positions that can be used to send the SL PRS and / or physical channel include other starting OFDM symbol positions other than the first starting OFDM symbol position that can be used to send the SL PRS and / or physical channel, or additional starting OFDM symbol positions. That is, in this embodiment 2, there can be one basic starting OFDM symbol position and one or more additional starting OFDM symbol positions in a time slot.

[0168] In some embodiments, the one resource is determined according to first resource configuration information.

[0169] For example, the one resource is a SL PRS resource, and the one SL PRS resource can be determined according to the first SL PRS resource configuration information.

[0170] As an example and not a limitation, the first resource configuration information is used to configure but not limited to at least one of the following:

[0171] Multiple starting OFDM symbol positions of the resource, the number of OFDM symbols included in the resource (ie, symbol length), the bandwidth of the resource, the comb tooth size of the resource, the RE offset of the resource, the sequence ID of the SL PRS, and the ending OFDM symbol position of the resource.

[0172] In some embodiments, the first resource configuration information is pre-configured, or configured by a network device, or pre-defined.

[0173] It should be understood that the configuration method of each parameter in the first resource configuration information can be the same, or can also be different.

[0174] For example, some parameters in the first resource configuration information are pre-configured, and other parameters are configured by the network device.

[0175] For another example, some parameters in the first resource configuration information are defined by the standard, and other parameters are configured by the network device.

[0176] It should be noted that the specific implementation of the number of OFDM symbols included in the resources, the bandwidth of the resources, the RE offset, the sequence ID of the SL PRS, etc., refers to the relevant description of the aforementioned embodiment 1, and for the sake of brevity, it will not be repeated here.

[0177] In some embodiments, the number of OFDM symbols included in the resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0178] In some embodiments, the number of OFDM symbols contained in the resource may refer to the maximum number of OFDM symbols used to send the SL PRS and / or the physical channel.

[0179] In a specific embodiment, as shown in FIG16 , assuming that there are 14 OFDM symbols in a time slot, namely OFDM symbols #0 to #13, a resource includes OFDM symbols #0 to #12 in the time slot, and the allowed starting OFDM symbol positions include OFDM symbol #0 and OFDM symbol #4. A terminal device using this resource can start transmitting the SL PRS and / or physical channel at the nearest starting OFDM symbol position after LBT succeeds.

[0180] The following describes how to determine the comb size of a resource.

[0181] Method 1: The comb size of the resource is pre-configured or configured by the network device.

[0182] Mode 2: The comb tooth size of the resource is based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the resource (i.e., the ending OFDM symbol position). min Sure.

[0183] Optionally, the last OFDM symbol of the resource may be configured or pre-configured, for example, the resource configuration information may configure the starting OFDM symbol position and the ending OFDM symbol position of a resource.

[0184] For example, the comb size of the resource is equal to N min -1. Since the first OFDM symbol in a time slot is used for AGC adjustment, in order to ensure that the SL PRS or physical channel sent in the available OFDM symbol occupies all REs, the comb tooth size can be equal to N min -1.

[0185] In a specific example, as shown in FIG16 , the number of OFDM symbols between the last allowed starting OFDM symbol #4 and the last OFDM symbol #12 of the resource is 9, and the comb size sent in the SL PRS resource should be 8.

[0186] In mode 2, if the terminal device sends an SL PRS or physical channel before the last starting OFDM symbol, the SL PRS or physical channel sent by the terminal device in the last starting OFDM symbol may be a repetition of the SL PRS or physical channel sent by the terminal device in the first starting OFDM symbol or the OFDM symbol after the first starting OFDM symbol.

[0187] For example, the terminal device sends SL PRS on OFDM symbol #i, and OFDM symbol #i is located before the last starting OFDM symbol #s. Then the SL PRS sent by the terminal device on OFDM symbol #i can be the same as the SL PRS sent by the terminal device on OFDM symbol #[s+N min -mod(si,N min )+1], where i and s are the indices of the OFDM symbol in the time slot.

[0188] Based on the method 2 to determine the comb tooth size of the resource, the terminal device does not need to dynamically adjust the SL PRS transmission sequence and / or encoding for indicating the physical channel of the SL PRS according to the starting OFDM position of the SL PRS, which is conducive to reducing the implementation complexity of the terminal device.

[0189] In this embodiment 2, after the LBT is successful, the terminal device can start sending the SL PRS and / or physical channel at the nearest starting OFDM symbol position, which is conducive to improving the probability of SL PRS transmission and improving the accuracy of positioning. For example, in the example of Figure 16, if the terminal device completes LBT before OFDM symbol #3, the terminal device can start sending the SL PRS and / or physical channel from OFDM symbol #4.

[0190] For a receiving terminal, it can detect the SL PRS and / or physical channel sent by other terminal devices only from a configured or pre-configured starting OFDM symbol position, where the physical channel is used to indicate the sending of the SL PRS.

[0191] Embodiment 3: One resource is configured or pre-configured within a time slot, and the one resource is configured to send the SL PRS and / or the latest starting OFDM symbol position of the physical channel.

[0192] In this embodiment 3, the terminal device may start sending the SL PRS and / or the physical channel from the first OFDM symbol after the LBT is successful. The OFDM symbol position at which the terminal device starts sending the SL PRS and / or the physical channel is no later than the latest starting OFDM symbol position.

[0193] In some embodiments, the one resource is determined based on second resource configuration information, wherein the second resource configuration information includes first indication information, and the first indication information is used to indicate the latest starting OFDM symbol position. For example, the first indication information can be the index of the latest starting OFDM symbol, or the index of the maximum starting OFDM symbol.

[0194] In some embodiments, the second resource configuration information is further used to configure but not limited to at least one of the following:

[0195] The resources include the number of OFDM symbols (ie, symbol length), the bandwidth of the resources, the comb tooth size of the resources, the RE offset of the resources, the sequence ID of the SL PRS, and the end OFDM symbol position of the resources.

[0196] The specific implementation of the resources including the number of OFDM symbols, resource bandwidth, RE offset, SL PRS sequence ID, etc., refers to the relevant description of the aforementioned embodiment 1, and will not be repeated here for the sake of brevity.

[0197] In some embodiments, the second resource configuration information may be pre-configured, configured by the network device, or defined by a standard.

[0198] It should be understood that the configuration method of each parameter in the second resource configuration information can be the same, or can also be different.

[0199] For example, some parameters in the second resource configuration information are pre-configured, and other parameters are configured by the network device.

[0200] For another example, some parameters in the second resource configuration information are defined by the standard, and other parameters are configured by the network device.

[0201] The following describes how to determine the comb size of a resource.

[0202] Mode 1: The comb tooth size of the resource is pre-configured or configured by the network device.

[0203] Mode 2: The comb tooth size of the resource is based on the number N of OFDM symbols between the latest starting OFDM symbol position and the last OFDM symbol of the resource. min For example, the comb tooth size of the resource is equal to N min For the specific implementation, please refer to the relevant description in Example 2, which will not be repeated here for the sake of brevity.

[0204] Mode 3: The comb tooth size of the resource is determined according to the number of OFDM symbols actually used to send the SL PRS and / or the physical channel. Determining the comb tooth size based on this mode 3 is conducive to selecting a more optimal comb tooth size.

[0205] For example, if the number of OFDM symbols actually used for SL PRS is M, the terminal device can select a size less than or equal to M from multiple candidate comb tooth sizes as the comb tooth size of the resource. Optionally, the multiple candidate comb tooth sizes can include some or all of {1, 2, 4, 6, 8, 12}.

[0206] In this embodiment 3, the terminal device can start sending SL PRS and / or physical channel from the starting point of the first OFDM symbol after LBT is successful, wherein the first OFDM symbol used to send SL PRS and / or physical channel should not be later than the latest allowed starting OFDM symbol position.

[0207] In summary, in an embodiment of the present application, multiple resources are configured or pre-configured within a time slot, and each of the multiple resources corresponds to a starting OFDM symbol position that can be used to send SL PRS and / or physical channels. The terminal device can start sending SL PRS and / or physical channels from the starting OFDM symbol position corresponding to the multiple resources that can be used to send SL PRS and / or physical channels; or, a resource is configured or pre-configured within a time slot, and the one resource is configured with multiple starting OFDM symbol positions that can be used to send SL PRS and / or physical channels. The terminal device can start sending SL PRS and / or physical channels from the multiple starting OFDM symbol positions corresponding to the one resource that can be used to send SL PRS and / or physical channels; or, a resource can be configured or pre-configured within a time slot, and the resource can be configured with the latest starting OFDM symbol position that can be used to send SL PRS and / or physical channels. The terminal device starts sending SL PRS and / or physical channels from the starting point of the first OFDM symbol after the LBT is successful, which is beneficial to increase the probability of SL PRS transmission on the unlicensed spectrum and improve the positioning accuracy.

[0208] FIG17 is a schematic diagram of a wireless communication method 300 according to another embodiment of the present application. As shown in FIG17 , the method 300 includes at least part of the following:

[0209] S310, the terminal device sends a side positioning reference signal SL PRS according to the SL PRS resources configured in the time slot; and

[0210] A physical channel is sent according to the physical channel resources configured in the time slot, and the physical channel is used to indicate the sending of the SL PRS.

[0211] In some embodiments, the physical channels may include PSCCH and / or PSSCH.

[0212] Embodiment 4: The physical channel resources are configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send physical channels, and the SL PRS resources are located after the physical channel resources.

[0213] Optionally, in this embodiment 4, there is a separate OFDM symbol for physical channel transmission at the beginning of a time slot, and the physical channel is used to indicate the transmission of the SL PRS.

[0214] In a specific embodiment, multiple starting OFDM symbol positions are configured in a time slot, and the multiple starting OFDM symbol positions can be used to send physical channels. For example, if a time slot includes 14 OFDM symbols, OFDM symbol #0 and OFDM symbol #3 or 4 can be used to start sending the physical channel.

[0215] In this embodiment 4, by configuring physical channel resources with multiple starting OFDM symbol positions, the starting OFDM symbol positions of the SL PRS resources configured in the time slot are also different accordingly. For example, if the starting OFDM symbol position of the physical channel is later, the number of OFDM symbols that can be used for SL PRS transmission is also smaller, that is, the fewer SL PRS resources are configured in the time slot, or in other words, the SL PRS resources occupy fewer OFDM symbols.

[0216] Embodiment 5: The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send SL PRS, and the physical channel resource is after the SL PRS resource.

[0217] Therefore, by configuring the SL PRS resources with multiple starting OFDM symbol positions, the starting OFDM symbol positions of the physical channel resources configured in the time slot are also different accordingly.

[0218] Optionally, the physical channel resources include, after the SL PRS resources:

[0219] The physical channel resources are located in the last m OFDM symbols available for sideline transmission in a time slot (ie, excluding GP symbols), where m is a positive integer.

[0220] In some embodiments, the SL PRS resource is determined according to first SL PRS resource configuration information, where the first SL PRS resource configuration information is used to configure at least one of the following:

[0221] Multiple starting OFDM symbol positions of SL PRS resources;

[0222] The number of OFDM symbols included in the SL PRS resource;

[0223] Bandwidth of SL PRS resources;

[0224] comb size of SL PRS resources;

[0225] RE offset of SL PRS resources;

[0226] Sequence ID of SL PRS;

[0227] End OFDM symbol position of SL PRS.

[0228] Among them, the specific implementation of the starting OFDM symbol position of the SL PRS resource, the number of OFDM symbols included in the SL PRS resource, the bandwidth of the SL PRS resource, the comb tooth size of the SL PRS resource, the RE offset of the SL PRS resource, the sequence ID of the SL PRS, etc., refer to the relevant description of Example 2 in method 200, and will not be repeated here for the sake of brevity.

[0229] In some embodiments, the number of OFDM symbols occupied by the SL PRS resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0230] In some embodiments, the comb size of the SL PRS resource is pre-configured or configured by the network device.

[0231] In some embodiments, the comb tooth size of the SL PRS resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the SL PRS resource. min Sure.

[0232] In some embodiments, the comb size of the SL PRS resource is equal to N min -1.

[0233] In some embodiments, the first SL PRS resource configuration information is pre-configured, or configured by a network device, or defined by a standard.

[0234] In summary, in the embodiment of the present application, multiple starting OFDM symbol positions for sending physical channels are configured or pre-configured in the time slot. For physical channels sent at different starting OFDM symbol positions for sending physical channels, the starting OFDM symbol positions of the SL PRS resources in the time slot are also different accordingly. Therefore, the terminal device can send SL PRS or physical channels at multiple different starting OFDM symbol positions. Or

[0235] Multiple starting OFDM symbol positions for sending SL PRS are configured or pre-configured in the time slot. For the SL PRS sent at different starting OFDM symbol positions for sending SL PRS, the starting OFDM symbol positions of the physical channel resources in the time slot are also different accordingly. Therefore, the terminal device can send SL PRS or physical channels at multiple different starting OFDM symbol positions.

[0236] The above text, in combination with Figures 13 to 17, describes in detail the method embodiment of the present application. The following text, in combination with Figures 18 to 24, describes in detail the device embodiment of the present application. It should be understood that the device embodiment and the method embodiment correspond to each other, and similar descriptions can refer to the method embodiment.

[0237] FIG18 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in FIG18 , the terminal device 400 includes:

[0238] The communication unit 410 is used to send a side positioning reference signal SL PRS and / or a physical channel according to one or more resources configured in the time slot, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, or the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0239] In some embodiments, a plurality of resources are configured within the time slot, and each resource is configured with a starting OFDM symbol position that can be used to send the SL PRS and / or the physical channel.

[0240] In some embodiments, the multiple resources correspond to different starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0241] In some embodiments, the multiple resources overlap in the time domain.

[0242] In some embodiments, each resource among the multiple resources is determined according to corresponding resource configuration information, and the starting OFDM symbol positions determined according to the resource configuration information corresponding to the multiple resources are different.

[0243] In some embodiments, the resource configuration information is used to configure at least one of the following:

[0244] The starting OFDM symbol position of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the resource unit RE offset of the resource, and the sequence identifier of the SL PRS.

[0245] In some embodiments, the resource configuration information is pre-configured, or configured by the network device, or pre-defined by a standard.

[0246] In some embodiments, one resource is configured in the time slot, and the one resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0247] In some embodiments, the one resource is determined according to first resource configuration information.

[0248] In some embodiments, the first resource configuration information is used to configure at least one of the following: multiple starting OFDM symbol positions of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

[0249] In some embodiments, the number of OFDM symbols included in the resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0250] In some embodiments, the comb size of the resource is pre-configured or configured by the network device.

[0251] In some embodiments, the comb tooth size of the resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the plurality of starting OFDM symbol positions and the last OFDM symbol of the resource. min Sure.

[0252] In some embodiments, the comb size of the resource is equal to N min -1.

[0253] In some embodiments, the first resource configuration information is pre-configured, or configured by a network device, or pre-defined.

[0254] In some embodiments, one resource is configured within the time slot, and the one resource is configured for sending the SL PRS and / or the latest starting OFDM symbol position of the physical channel.

[0255] In some embodiments, the terminal device starts sending the SL PRS and / or the OFDM symbol position of the physical channel no later than the latest starting OFDM symbol position.

[0256] In some embodiments, the communication unit 410 is further used to: start sending SL PRS and / or the physical channel at the first OFDM symbol position after the success of listen-before-talk LBT, wherein the first OFDM symbol position is no later than the latest starting OFDM symbol position.

[0257] In some embodiments, the one resource is determined according to second resource configuration information, wherein the second resource configuration information includes first indication information, and the first indication information is used to indicate the latest starting OFDM symbol position.

[0258] In some embodiments, the second resource configuration information is further used to configure at least one of the following: the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

[0259] In some embodiments, the comb size of the resource is pre-configured or configured by the network device.

[0260] In some embodiments, the comb tooth size of the resource is determined based on the number N of OFDM symbols between the latest starting OFDM symbol position and the last OFDM symbol of the resource. min Sure.

[0261] In some embodiments, the comb size of the resource is equal to N min -1.

[0262] In some embodiments, the comb tooth size of the resource is determined according to the number of OFDM symbols actually used to send the SL PRS and / or the physical channel.

[0263] In some embodiments, the second resource configuration information is pre-configured, or configured by a network device, or pre-defined by a standard.

[0264] In some embodiments, the physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

[0265] Alternatively, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0266] It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the above-mentioned and other operations and / or functions of each unit in the terminal device 400 are respectively for realizing the corresponding processes of the terminal device in the method 200 shown in Figures 13 to 16. For the sake of brevity, they will not be repeated here.

[0267] FIG19 shows a schematic block diagram of a terminal device 500 according to an embodiment of the present application. As shown in FIG19 , the terminal device 500 includes:

[0268] The communication unit 510 is configured to send a sidelink positioning reference signal SL PRS according to the SL PRS resources configured in the time slot; and

[0269] Sending a physical channel according to the physical channel resources configured in the time slot, where the physical channel is used to indicate the sending of the SL PRS;

[0270] The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or

[0271] The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

[0272] In some embodiments, the physical channel resources, subsequent to the SL PRS resources, include:

[0273] The physical channel resources are located in the last m OFDM symbols available for sideline transmission in a time slot, where m is a positive integer.

[0274] In some embodiments, the SL SPRS resource is configured with multiple starting OFDM symbol positions that can be used to send SL PRS, and the SL PRS resource is determined based on first SL PRS resource configuration information, and the first SL PRS resource configuration information includes at least one of the following: multiple starting OFDM symbol positions of the SL PRS resource, the number of OFDM symbols of the SL PRS resource, the bandwidth of the SL PRS resource, the comb tooth size of the SL PRS resource, the RE offset of the SL PRS resource, and the sequence identifier of the SL PRS.

[0275] In some embodiments, the number of OFDM symbols occupied by the SL PRS resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0276] In some embodiments, the comb size of the SL PRS resource is pre-configured or configured by the network device.

[0277] In some embodiments, the comb tooth size of the SL PRS resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the SL PRS resource. min Sure.

[0278] In some embodiments, the comb size of the SL PRS resource is equal to N min -1.

[0279] In some embodiments, the first SL PRS resource configuration information is pre-configured, or configured by a network device, or pre-defined.

[0280] In some embodiments, the physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

[0281] In some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0282] It should be understood that the terminal device 500 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the above-mentioned and other operations and / or functions of each unit in the terminal device 500 are respectively for realizing the corresponding processes of the terminal device in the method 300 shown in Figure 17. For the sake of brevity, they will not be repeated here.

[0283] FIG20 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 1000 of FIG20 includes:

[0284] Communication unit 1010 is used to configure one or more resources within a time slot for a terminal device, and the one or more resources are used by the terminal device to send a side positioning reference signal SL PRS and / or a physical channel, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, and the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0285] In some embodiments, a plurality of resources are configured in the time slot, and each resource is configured with a starting OFDM symbol position that can be used to send the SL PRS and / or the physical channel.

[0286] In some embodiments, the multiple resources correspond to different starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0287] In some embodiments, the multiple resources overlap in the time domain.

[0288] In some embodiments, each of the multiple resources is configured by corresponding resource configuration information, and the starting OFDM symbol positions configured by the resource configuration information corresponding to the multiple resources are different.

[0289] In some embodiments, the resource configuration information is used to configure at least one of the following:

[0290] The starting OFDM symbol position of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the resource unit RE offset of the resource, and the sequence identifier of the SL PRS.

[0291] In some embodiments, one resource is configured in the time slot, and the one resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

[0292] In some embodiments, the one resource is configured via first resource configuration information.

[0293] In some embodiments, the first resource configuration information is used to configure at least one of the following: multiple starting OFDM symbol positions of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

[0294] In some embodiments, the number of OFDM symbols included in the resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0295] In some embodiments, the comb size of the resource is pre-configured or configured by the network device.

[0296] In some embodiments, the comb tooth size of the resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the plurality of starting OFDM symbol positions and the last OFDM symbol of the resource. min Sure.

[0297] In some embodiments, the comb size of the resource is equal to N min -1.

[0298] In some embodiments, one resource is configured in the time slot, and the one resource is configured to send the SL PRS and / or the latest starting OFDM symbol position of the physical channel.

[0299] In some embodiments, the terminal device starts sending the SL PRS and / or the OFDM symbol position of the physical channel no later than the latest starting OFDM symbol position.

[0300] In some embodiments, the one resource is configured through second resource configuration information, wherein the second resource configuration information includes first indication information, and the first indication information is used to indicate the latest starting OFDM symbol position.

[0301] In some embodiments, the second resource configuration information is further used to configure at least one of the following: the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

[0302] In some embodiments, the comb size of the resource is pre-configured or configured by the network device.

[0303] In some embodiments, the comb tooth size of the resource is determined based on the number N of OFDM symbols between the latest starting OFDM symbol position and the last OFDM symbol of the resource. min Sure.

[0304] In some embodiments, the comb size of the resource is equal to N min -1.

[0305] In some embodiments, the comb tooth size of the resource is determined according to the number of OFDM symbols actually used to send the SL PRS and / or the physical channel.

[0306] In some embodiments, the physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

[0307] In some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0308] It should be understood that the network device 1000 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the above-mentioned and other operations and / or functions of each unit in the network device 1000 are respectively for implementing the corresponding processes of the network device in the method 200 shown in Figures 13 to 16. For the sake of brevity, they will not be repeated here.

[0309] FIG21 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 1100 of FIG21 includes:

[0310] The communication unit 1110 is configured to configure the sideline positioning reference signal SL PRS resources and physical channel resources in the time slot for the terminal device.

[0311] The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or

[0312] The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

[0313] In some embodiments, the physical channel resources, subsequent to the SL PRS resources, include:

[0314] The physical channel resources are located in the last m OFDM symbols available for sideline transmission in a time slot, where m is a positive integer.

[0315] In some embodiments, the SL SPRS resource is configured with a plurality of starting OFDM symbol positions that can be used to send the SL PRS, and the SL PRS resource is configured by first SL PRS resource configuration information, and the first SL PRS resource configuration information is used to configure at least one of the following:

[0316] Multiple starting OFDM symbol positions of SL PRS resources, number of OFDM symbols of SL PRS resources, bandwidth of SL PRS resources, comb tooth size of SL PRS resources, RE offset of SL PRS resources, and sequence identifier of SL PRS.

[0317] In some embodiments, the number of OFDM symbols occupied by the SL PRS resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

[0318] In some embodiments, the comb size of the SL PRS resource is pre-configured or configured by the network device.

[0319] In some embodiments, the comb tooth size of the SL PRS resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the SL PRS resource. min Sure.

[0320] In some embodiments, the comb size of the SL PRS resource is equal to N min -1.

[0321] In some embodiments, the first SL PRS resource configuration information is pre-configured, or configured by a network device, or pre-defined.

[0322] In some embodiments, the physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

[0323] In some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0324] It should be understood that the network device 1100 according to the embodiment of the present application may correspond to the network device in the embodiment of the method of the present application, and the above-mentioned and other operations and / or functions of each unit in the network device 1100 are respectively for realizing the corresponding processes of the network device in the method 300 shown in Figure 17. For the sake of brevity, they will not be repeated here.

[0325] Figure 22 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device 600 shown in Figure 22 includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0326] Optionally, as shown in FIG22 , the communication device 600 may further include a memory 620. The processor 610 may call and execute a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0327] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0328] Optionally, as shown in FIG22 , the communication device 600 may further include a transceiver 630 , and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0329] The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of antennas may be one or more.

[0330] Optionally, the communication device 600 may specifically be a network device in an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0331] Optionally, the communication device 600 may specifically be a mobile terminal / terminal device in an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0332] Figure 23 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in Figure 23 includes a processor 710, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0333] Optionally, as shown in FIG23 , the chip 700 may further include a memory 720 , wherein the processor 710 may call and execute a computer program from the memory 720 to implement the method in the embodiment of the present application.

[0334] The memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .

[0335] Optionally, the chip 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0336] Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0337] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0338] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0339] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0340] FIG24 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application. As shown in FIG24 , the communication system 900 includes a terminal device 910 and a network device 920 .

[0341] Among them, the terminal device 910 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 920 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be repeated here.

[0342] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0343] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0344] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0345] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0346] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0347] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0348] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0349] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0350] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0351] The embodiment of the present application also provides a computer program.

[0352] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0353] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0354] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0355] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0360] 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 the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device sends a side positioning reference signal SL PRS and / or a physical channel according to one or more resources configured in the time slot, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, or the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

2. The method according to claim 1, characterized in that A plurality of resources are configured in the time slot, and each resource is configured with a starting OFDM symbol position that can be used to send the SL PRS and / or the physical channel.

3. The method according to claim 2, characterized in that The multiple resources correspond to different starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

4. The method according to claim 2 or 3, characterized in that The multiple resources overlap in the time domain.

5. The method according to any one of claims 2 to 4, characterized in that Each resource among the multiple resources is determined according to corresponding resource configuration information, and the starting OFDM symbol positions determined according to the resource configuration information corresponding to the multiple resources are different.

6. The method according to claim 5, characterized in that The resource configuration information is used to configure at least one of the following: The starting OFDM symbol position of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the resource unit RE offset of the resource, and the sequence identifier of the SL PRS.

7. The method according to claim 5 or 6, characterized in that The resource configuration information is pre-configured, or configured by the network device, or pre-defined by a standard.

8. The method according to claim 1, characterized in that One resource is configured in the time slot, and the one resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

9. The method according to claim 8, characterized in that The one resource is determined according to the first resource configuration information.

10. The method according to claim 9, characterized in that The first resource configuration information is used to configure at least one of the following: multiple starting OFDM symbol positions of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

11. The method according to claim 10, characterized in that The number of OFDM symbols included in the resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

12. The method according to claim 10 or 11, characterized in that The comb size of the resource is pre-configured or configured by the network device.

13. The method according to claim 10 or 11, characterized in that The comb tooth size of the resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the resource. min Sure.

14. The method according to claim 13, characterized in that The comb size of the resource is equal to N min -1.

15. The method according to any one of claims 9 to 14, characterized in that The first resource configuration information is preconfigured, or configured by a network device, or predefined.

16. The method according to claim 1, characterized in that One resource is configured in the time slot, and the one resource is configured to send the SL PRS and / or the latest starting OFDM symbol position of the physical channel.

17. The method according to claim 16, characterized in that The terminal device starts sending the SL PRS and / or the OFDM symbol position of the physical channel no later than the latest starting OFDM symbol position.

18. The method according to claim 16 or 17, characterized in that The method further comprises: The terminal device starts sending SL PRS and / or the physical channel at the first OFDM symbol position after the listen-before-talk LBT is successful, wherein the first OFDM symbol position is no later than the latest starting OFDM symbol position.

19. The method according to any one of claims 16 to 18, characterized in that The one resource is determined according to second resource configuration information, wherein the second resource configuration information includes first indication information, and the first indication information is used to indicate the latest starting OFDM symbol position.

20. The method according to claim 19, characterized in that The second resource configuration information is further used to configure at least one of the following: the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

21. The method according to claim 20, characterized in that The comb size of the resource is pre-configured or configured by the network device.

22. The method according to claim 20, characterized in that The comb tooth size of the resource is determined by the number N of OFDM symbols between the latest starting OFDM symbol position and the last OFDM symbol of the resource. min Sure.

23. The method according to claim 22, characterized in that The comb size of the resource is equal to N min -1.

24. The method according to claim 20, characterized in that The comb tooth size of the resource is determined according to the number of OFDM symbols actually used to send the SL PRS and / or the physical channel.

25. The method according to any one of claims 19 to 24, characterized in that The second resource configuration information is preconfigured, or configured by a network device, or predefined by a standard.

26. The method according to any one of claims 1 to 25, characterized in that The physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

27. A wireless communication method, characterized in that: include: The terminal device sends the SL PRS according to the side positioning reference signal SL PRS resources configured in the time slot; and Sending a physical channel according to the physical channel resources configured in the time slot, where the physical channel is used to indicate the sending of the SL PRS; The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

28. The method according to claim 27, characterized in that The physical channel resources are subsequent to the SL PRS resources and include: The physical channel resources are located in the last m OFDM symbols available for sideline transmission in a time slot, where m is a positive integer.

29. The method according to claim 27 or 28, characterized in that The SL SPRS resource is configured with a plurality of starting OFDM symbol positions that can be used to send the SL PRS. The SL PRS resource is determined according to first SL PRS resource configuration information, and the first SL PRS resource configuration information includes at least one of the following: Multiple starting OFDM symbol positions of SL PRS resources, number of OFDM symbols of SL PRS resources, bandwidth of SL PRS resources, comb tooth size of SL PRS resources, RE offset of SL PRS resources, and sequence identifier of SL PRS.

30. The method according to claim 29, wherein The number of OFDM symbols occupied by the SL PRS resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

31. The method according to claim 29 or 30, characterized in that The comb tooth size of the SL PRS resource is pre-configured or configured by the network device.

32. The method according to claim 29 or 30, characterized in that The comb tooth size of the SL PRS resource is determined by the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the SL PRS resource. min Sure.

33. The method according to claim 32, characterized in that The comb size of the SL PRS resource is equal to N min -1.

34. The method according to any one of claims 29 to 33, wherein: The first SL PRS resource configuration information is pre-configured, or configured by a network device, or pre-defined.

35. The method according to any one of claims 27 to 34, characterized in that The physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

36. A wireless communication method, characterized in that: include: The network device configures one or more resources within a time slot for the terminal device, and the one or more resources are used by the terminal device to send a side positioning reference signal SL PRS and / or a physical channel, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, and the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

37. The method according to claim 36, wherein A plurality of resources are configured in the time slot, and each resource is configured with a starting OFDM symbol position that can be used to send the SL PRS and / or the physical channel.

38. The method according to claim 37, wherein The multiple resources correspond to different starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

39. The method according to claim 37 or 38, characterized in that The multiple resources overlap in the time domain.

40. The method according to any one of claims 37 to 39, wherein Each resource among the multiple resources is configured by corresponding resource configuration information, and the starting OFDM symbol positions configured by the resource configuration information corresponding to the multiple resources are different.

41. The method according to claim 40, wherein The resource configuration information is used to configure at least one of the following: The starting OFDM symbol position of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the resource unit RE offset of the resource, and the sequence identifier of the SL PRS.

42. The method according to claim 36, wherein One resource is configured in the time slot, and the one resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

43. The method according to claim 42, characterized in that The one resource is configured by first resource configuration information.

44. The method according to claim 43, wherein The first resource configuration information is used to configure at least one of the following: multiple starting OFDM symbol positions of the resource, the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

45. The method according to claim 44, wherein The number of OFDM symbols included in the resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

46. ​​The method according to claim 44 or 45, characterized in that The comb size of the resource is pre-configured or configured by the network device.

47. The method according to claim 44 or 45, characterized in that The comb tooth size of the resource is determined based on the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the resource. min Sure.

48. The method according to claim 47, wherein The comb size of the resource is equal to N min -1.

49. The method according to claim 36, wherein One resource is configured in the time slot, and the one resource is configured to send the SL PRS and / or the latest starting OFDM symbol position of the physical channel.

50. The method according to claim 49, wherein The terminal device starts sending the SL PRS and / or the OFDM symbol position of the physical channel no later than the latest starting OFDM symbol position.

51. The method according to claim 49 or 50, characterized in that The one resource is configured through second resource configuration information, wherein the second resource configuration information includes first indication information, and the first indication information is used to indicate the latest starting OFDM symbol position.

52. The method according to claim 51, characterized in that The second resource configuration information is further used to configure at least one of the following: the number of OFDM symbols included in the resource, the bandwidth of the resource, the comb tooth size of the resource, the RE offset of the resource, and the sequence identifier of the SL PRS.

53. The method according to claim 52, characterized in that The comb size of the resource is pre-configured or configured by the network device.

54. The method according to claim 52, wherein The comb tooth size of the resource is determined by the number N of OFDM symbols between the latest starting OFDM symbol position and the last OFDM symbol of the resource. min Sure.

55. The method according to claim 54, characterized in that The comb size of the resource is equal to N min -1.

56. The method according to claim 52, wherein The comb tooth size of the resource is determined according to the number of OFDM symbols actually used to send the SL PRS and / or the physical channel.

57. The method according to any one of claims 36 to 56, wherein: The physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

58. A wireless communication method, characterized in that: include: The network equipment configures the sideline positioning reference signal SL PRS resources and physical channel resources in the time slot for the terminal equipment. The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

59. The method according to claim 58, characterized in that The physical channel resources are subsequent to the SL PRS resources and include: The physical channel resources are located in the last m OFDM symbols available for sideline transmission in a time slot, where m is a positive integer.

60. The method according to claim 58 or 59, characterized in that The SL SPRS resource is configured with a plurality of starting OFDM symbol positions that can be used to send the SL PRS. The SL PRS resource is configured by first SL PRS resource configuration information, and the first SL PRS resource configuration information is used to configure at least one of the following: Multiple starting OFDM symbol positions of SL PRS resources, number of OFDM symbols of SL PRS resources, bandwidth of SL PRS resources, comb tooth size of SL PRS resources, RE offset of SL PRS resources, and sequence identifier of SL PRS.

61. The method according to claim 60, characterized in that The number of OFDM symbols occupied by the SL PRS resource is counted starting from the first starting OFDM symbol position among the multiple starting OFDM symbol positions.

62. The method according to claim 60 or 61, characterized in that The comb tooth size of the SL PRS resource is pre-configured or configured by the network device.

63. The method according to claim 60 or 61, characterized in that The comb tooth size of the SL PRS resource is determined by the number N of OFDM symbols between the last starting OFDM symbol position in the multiple starting OFDM symbol positions and the last OFDM symbol of the SL PRS resource. min Sure.

64. The method according to claim 63, wherein The comb size of the SL PRS resource is equal to N min -1.

65. The method according to any one of claims 60 to 64, wherein: The first SL PRS resource configuration information is pre-configured, or configured by a network device, or pre-defined.

66. The method according to any one of claims 58 to 65, wherein: The physical channel includes a physical sidelink control channel PSCCH and / or a physical sidelink shared channel PSSCH.

67. A terminal device, characterized in that: include: A communication unit is used to send a side positioning reference signal SL PRS and / or a physical channel according to one or more resources configured in a time slot, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, or the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

68. A terminal device, characterized in that: include: A communication unit, configured to send a side positioning reference signal (SL PRS) according to the SL PRS resources configured in the time slot; and Sending a physical channel according to the physical channel resources configured in the time slot, where the physical channel is used to indicate the sending of the SL PRS; The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

69. A network device, characterized in that include: A communication unit is used to configure one or more resources within a time slot for a terminal device, wherein the one or more resources are used by the terminal device to send a side positioning reference signal SL PRS and / or a physical channel, and the physical channel is used to indicate the sending of the SL PRS, wherein the resource corresponds to a starting orthogonal frequency division multiplexing OFDM symbol position that can be used to send the SL PRS and / or the physical channel, and the resource corresponds to multiple starting OFDM symbol positions that can be used to send the SL PRS and / or the physical channel.

70. A network device, characterized in that include: The communication unit is used to configure the side positioning reference signal SL PRS resources and physical channel resources in the time slot for the terminal device, The physical channel resource is configured with a plurality of starting orthogonal frequency division multiplexing (OFDM) symbol positions that can be used to send a physical channel, and the SL PRS resource is after the physical channel resource; or The SL PRS resource is configured with multiple starting OFDM symbol positions that can be used to send the SL PRS, and the physical channel resource is after the SL PRS resource.

71. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to perform the method according to any one of claims 1 to 26, or the method according to any one of claims 27 to 35.

72. A network device, characterized in that include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 36 to 57, or the method according to any one of claims 58 to 66.

73. A chip, characterized in that include: A processor for calling and running a computer program from a memory so that a device equipped with the chip performs the method according to any one of claims 1 to 26, or the method according to any one of claims 27 to 35, or the method according to any one of claims 36 to 57, or the method according to any one of claims 58 to 66.

74. A computer-readable storage medium, characterized in that Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 26, or the method according to any one of claims 27 to 35, or the method according to any one of claims 36 to 57, or the method according to any one of claims 58 to 66.

75. A computer program product, characterized in that Comprising computer program instructions which cause a computer to perform the method of any one of claims 1 to 26, or the method of any one of claims 27 to 35, or the method of any one of claims 36 to 57, or the method of any one of claims 58 to 66.

76. A computer program, characterized in that The computer program causes a computer to perform the method of any one of claims 1 to 26, or the method of any one of claims 27 to 35, or the method of any one of claims 36 to 57, or the method of any one of claims 58 to 66.

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