Wireless communication method and terminal equipment

Abstract

The embodiment of the invention provides a wireless communication method and terminal equipment, which can realize effective multiplexing of a reference signal for absolute positioning and / or relative positioning and at least one side channel, reduce the influence of the transmission of the positioning reference signal on channel interception, and provide effective positioning information. The wireless communication method comprises the following steps: a first terminal device sends at least one reference signal and at least one sidewalk channel to a second terminal device in a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning.

Description

[0001] This application is a divisional application of the invention application with application date of December 27, 2021, application number 202180103620.6, and invention name “Wireless Communication Method and Terminal Device”. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and more specifically, to a method and terminal device for wireless communications. Background Art

[0003] In sidelink communications, in order to achieve positioning based on the sidelink, it is necessary to send a valid positioning reference signal on the sidelink. However, there may also be a sidelink channel sent by the terminal device on the sidelink. In this case, how to send the positioning reference signal is a problem that needs to be solved. Summary of the invention

[0004] The embodiments of the present application provide a wireless communication method and terminal device, which can realize the effective multiplexing of reference signals used for absolute positioning and / or relative positioning and at least one side channel, reduce the impact of the transmission of positioning reference signals on channel monitoring, and provide effective positioning information.

[0005] In a first aspect, a wireless communication method is provided, the method comprising:

[0006] The first terminal device sends at least one reference signal and at least one side channel to the second terminal device within a first time unit;

[0007] Therein, the at least one reference signal is used for absolute positioning and / or relative positioning.

[0008] In a second aspect, a wireless communication method is provided, the method comprising:

[0009] The second terminal device receives at least one reference signal and at least one side channel sent by the first terminal device within a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning.

[0010] In a third aspect, a terminal device is provided for executing the method in the first aspect.

[0011] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect.

[0012] In a fourth aspect, a terminal device is provided for executing the method in the second aspect.

[0013] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned second aspect.

[0014] In a fifth aspect, a terminal device is provided, comprising a processor and a memory; the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect.

[0015] In a sixth aspect, a terminal device is provided, comprising a processor and a memory; the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above second aspect.

[0016] In a seventh aspect, a device is provided for implementing the method in any one of the first to second aspects above.

[0017] Specifically, the apparatus includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the apparatus executes the method in any one of the first to second aspects described above.

[0018] In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to second aspects above.

[0019] In a ninth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to second aspects above.

[0020] In a tenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects above.

[0021] Through the above technical solution, the first terminal device sends at least one reference signal and at least one side channel to the second terminal device within the first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning. That is, the embodiment of the present application can realize the effective multiplexing of the reference signal used for absolute positioning and / or relative positioning and at least one side channel, reduce the impact of the transmission of the positioning reference signal on the channel listening, and provide effective positioning information. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a communication system architecture provided by this application.

[0023] Figure 2 It is a schematic diagram of another communication system architecture provided by the present application.

[0024] Figure 3 It is a schematic diagram of sideline communication within the network coverage area provided by the present application.

[0025] Figure 4 It is a schematic diagram of a partial network coverage side communication provided by the present application.

[0026] Figure 5 It is a schematic diagram of line communication outside the network coverage provided by the present application.

[0027] Figure 6 It is a schematic diagram of side communication with a central control node provided by the present application.

[0028] Figure 7 It is a schematic diagram of a unicast sideline communication provided by the present application.

[0029] Figure 8 It is a schematic diagram of a multicast side communication provided by the present application.

[0030] Fig. 9 It is a schematic diagram of a broadcast sideline communication provided by this application.

[0031] Fig.10 This is a schematic diagram provided by the present application of using part of the symbols in a time slot for side transmission.

[0032] Fig.11 It is a schematic diagram of a PSCCH and PSSCH time slot structure provided by the present application.

[0033] Fig.12 This is a schematic diagram of the time domain positions of 4 DMRS symbols when there are 13 PSSCH symbols provided by the present application.

[0034] Fig.13 This is a PSSCH DMRS frequency domain position diagram provided by this application.

[0035] Fig.14 It is a schematic interactive flowchart of a wireless communication method provided according to an embodiment of the present application.

[0036] Figures 15 to 17 They are respectively schematic diagrams of at least one reference signal provided according to embodiments of the present application.

[0037] Fig.18 This is a schematic diagram showing that an OFDM symbol for PRS transmission is located before a sideline communication OFDM symbol according to an embodiment of the present application.

[0038] Fig.19 It is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0039] Fig. 20 It is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

[0040] Fig.21 It is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0041] Fig. 22 It is a schematic block diagram of a device provided according to an embodiment of the present application.

[0042] Fig.23 It 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 the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Internet of Things (IoT), etc. things, IoT), Wireless 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 (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type 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, wherein 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, wherein 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 (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 function, 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 the embodiments 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 (for example, on airplanes, balloons and satellites, etc.).

[0051] In the embodiment of the present application, the terminal device can 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, an in-vehicle communication device, a wireless communication chip / application specific integrated circuit (ASIC) / system on chip (SoC), etc.

[0052] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as 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 powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices 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 types of 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 (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, 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 but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, 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), and 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 in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

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

[0058] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which 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 relationship 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 two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0060] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0061] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication 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 arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

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

[0064] Figure 2 Schematic diagram of another communication system applicable to the embodiment of the present application. The vehicle-mounted terminal (vehicle-mounted terminal 131 and vehicle-mounted terminal 132) autonomously selects transmission resources on the resources of the side link for data transmission. Optionally, the vehicle-mounted terminal can randomly select transmission resources, or select transmission resources by listening.

[0065] It should be noted that, in the sideline communication, according to the network coverage of the communicating terminal, it can be divided into the sideline communication within the network coverage, such as Figure 3As shown; some networks cover sideline communications, such as Figure 4 As shown; and network coverage outside the line communication, such as Figure 5 shown.

[0066] Figure 3 : In the sideline communication within the network coverage, all the terminals performing the sideline communication are within the coverage of the base station. Thus, the above terminals can perform the sideline communication based on the same sideline configuration by receiving the configuration signaling of the base station.

[0067] Figure 4 : In the case of partial network coverage for sidelink communication, some terminals performing sidelink communication are located within the coverage of the base station. These terminals can receive the configuration signaling of the base station and perform sidelink communication according to the configuration of the base station. However, terminals outside the network coverage cannot receive the configuration signaling of the base station. In this case, the terminals outside the network coverage will determine the sidelink configuration and perform sidelink communication based on the pre-configuration information and the information carried in the Physical Sidelink Broadcast Channel (PSBCH) sent by the terminals within the network coverage.

[0068] Figure 5 : For sideline communications outside the network coverage, all terminals performing sideline communications are located outside the network coverage, and all terminals determine the sideline configuration according to pre-configuration information to perform sideline communications.

[0069] Figure 6 : For side communication with a central control node, multiple terminals constitute a communication group. The communication group has a central control node, which can also be called a cluster header terminal (Cluster Header, CH). The central control node has one of the following functions: responsible for the establishment of the communication group; the joining and leaving of group members; coordinating resources, allocating side transmission resources to other terminals, and receiving side feedback information from other terminals; coordinating resources with other communication groups, etc.

[0070] It should be noted that device-to-device communication is a sidelink (SL) transmission technology based on device-to-device (D2D). Different from the traditional cellular system where communication data is received or sent by base stations, the Internet of Vehicles system uses direct terminal-to-terminal communication, so it has higher spectrum efficiency and lower transmission latency. 3GPP defines two transmission modes, namely: the first mode (sidelink resource allocation mode 1) and the second mode (sidelink resource allocation mode 2).

[0071] The first mode: The transmission resources of the terminal are allocated by the base station, and the terminal sends data on the sidelink according to the resources allocated by the base station; the base station can allocate resources for a single transmission to the terminal, or allocate resources for semi-static transmission to the terminal. Figure 3 As shown, the terminal is within the coverage of the network, and the network allocates transmission resources for sideline transmission to the terminal.

[0072] The second mode: The terminal selects a resource in the resource pool to transmit data. Figure 5 As shown, the terminal is located outside the cell coverage, and the terminal autonomously selects transmission resources from the pre-configured resource pool for side transmission; or, as shown Figure 3 As shown, the terminal autonomously selects transmission resources from the resource pool configured by the network for side transmission.

[0073] In some embodiments, the second mode resource selection is performed according to the following two steps:

[0074] Step 1: The terminal takes all available resources in the resource selection window as resource set A.

[0075] If the terminal sends data in some time slots in the listening window without listening, all resources on the corresponding time slots in the selection window are excluded. The terminal determines the corresponding time slot in the selection window using the value set of the "resource reservation period" field in the resource pool configuration used.

[0076] If the terminal detects a physical sidelink control channel (PSCCH) within the listening window, the reference signal received power (RSRP) of the PSCCH or the RSRP of the physical sidelink shared channel (PSSCH) scheduled by the PSCCH is measured. If the measured RSRP is greater than the sidelink RSRP (SL-RSRP) threshold, and the reserved resources are determined to be within the resource selection window according to 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 all resources before resource set A is excluded, the SL-RSRP threshold is raised by 3 decibels (dB) and step 1 is executed again. The possible values ​​of X are {20, 35, 50}, and the terminal determines the parameter X from the value set according to the priority of the data to be sent. At the same time, the SL-RSRP threshold is related to the priority carried in the PSCCH detected by the terminal and the priority of the data to be sent by the terminal. The terminal uses the remaining resources in set A after the resources are excluded as the candidate resource set.

[0077] Step 2: The terminal randomly selects several resources from the candidate resource set as the transmission resources for its initial transmission and retransmission.

[0078] In New Radio-Vehicle to Everything (NR-V2X), autonomous driving is supported, which puts higher requirements on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.

[0079] In LTE-V2X, broadcast transmission is supported, and in NR-V2X, unicast and multicast transmission are introduced. For unicast transmission, there is only one receiving terminal, such as Figure 7 As shown in FIG, UE1 and UE2 perform unicast transmission; for multicast transmission, the receiving end is all terminals in a communication group, or all terminals within a certain transmission distance, such as Figure 8 As shown, UE1, UE2, UE3 and UE4 form a communication group, in which UE1 sends data, and other terminal devices in the group are receiving terminals; for the broadcast transmission mode, the receiving end is any terminal around the sending terminal, such as Fig. 9 As shown, UE1 is a transmitting terminal, and other terminals around it, UE2-UE6 are all receiving terminals.

[0080] A resource pool is introduced in the sideline transmission system. The so-called resource pool is a collection of transmission resources. Whether it is a transmission resource configured by the network or a transmission resource selected by the terminal independently, it is a resource in the resource pool. The resource pool can be configured by pre-configuration or network configuration, and one or more resource pools can be configured. The resource pool is divided into a sending resource pool and a receiving resource pool. The sending resource pool is the transmission resources in the resource pool used to send sideline data; the receiving resource pool is the transmission resources in the resource pool where the terminal receives sideline data.

[0081] In order to better understand the embodiments of the present application, the time slot structure in NR-V2X related to the present application is described.

[0082] In NR-V2X, PSSCH and its associated PSCCH are transmitted in the same time slot, and PSCCH occupies 2 time domain symbols, or, PSCCH occupies 3 time domain symbols. The time domain resource allocation of NR-V2X is based on the time slot as the allocation granularity. The starting point and length of the time domain symbol used for sidelink transmission in a time slot are configured by the sidelink start symbol (sl-startSLsymbols) and the sidelink length symbol (sl-lengthSLsymbols). The last symbol in this part of symbols is used as the guard period (GP). PSSCH and PSCCH can only use the remaining time domain symbols. However, if the physical sidelink feedback channel (PSFCH) transmission resources are configured in a time slot, PSSCH and PSCCH cannot occupy the time domain symbols used for PSFCH transmission, as well as the automatic gain control (AGC) and GP symbols before the symbol.

[0083] like Fig.10 As shown, the network configuration sl-StartSymbol=3, sl-LengthSymbols=11, that is, 11 time domain 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 symbols 11 and 12, wherein symbol 11 is used as the AGC symbol of PSFCH, symbols 10 and 13 are used as GPs respectively, and the time domain symbols that can be used for PSSCH transmission are symbols 3 to 9. PSCCH occupies 3 time domain symbols, namely symbols 4, 5, and 6, and symbol 3 is usually used as an AGC symbol.

[0084] In NR-V2X, a side slot initially contains PSCCH, PSSCH, and possibly PSFCH, such as Fig.11As shown. It can be seen that in a time slot, the first orthogonal frequency-division multiplexing (OFDM) symbol is fixed for AGC. On the AGC symbol, the UE copies the information sent on the second symbol. A symbol is reserved at the end of the time slot 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, the PSCCH can occupy two or three OFDM symbols starting from the second sideline symbol. In the frequency domain, the number of physical resource blocks (PRBs) occupied by the PSCCH is within the subband range of a PSSCH. If the number of PRBs occupied by the PSCCH is less than the size of a subchannel of the PSSCH, or the frequency domain resources of the PSSCH include multiple subchannels, then the PSCCH can be frequency-division multiplexed with the PSSCH on the OFDM symbol where the PSCCH is located.

[0085] The demodulation reference signal (DMRS) of PSSCH in NR-V2X draws on the design in the NR Uu interface and adopts multiple time-domain PSSCH DMRS patterns. In 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 in the pattern are shown in Table 1. Fig.12 A schematic diagram of the time domain position of 4 DMRS symbols when the number of PSSCH symbols is 13 is given in FIG.

[0086] Table 1

[0087]

[0088] If multiple time-domain DMRS patterns are configured in the resource pool, the specific time-domain DMRS pattern to be used is selected by the transmitting UE and indicated in the first-order sidelink control information (SCI). This design allows high-speed UEs to select high-density DMRS patterns to ensure the accuracy of channel estimation, while for low-speed UEs, low-density DMRS patterns can be used to improve spectrum efficiency.

[0089] The generation method of the PSSCH DMRS sequence is almost the same as that of the PSCCH DMRS sequence. The only difference is the initialization formula c(m) of the pseudo-random sequence. init middle, pi The i-th cyclic redundancy check (CRC) of the PSCCH that schedules the PSSCH, where L=24 is the number of bits of the PSCCH CRC.

[0090] The NR physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) support two frequency domain DMRS patterns, namely DMRS frequency domain type 1 and DMRS frequency domain type 2, and for each frequency domain type, there are two different types of single DMRS symbols and double DMRS symbols. Single-symbol DMRS frequency domain type 1 supports 4 DMRS ports, and single-symbol DMRS frequency domain type 2 can support 6 DMRS ports. In the case of double DMRS symbols, the number of supported ports is doubled. However, in NR-V2X, since PSSCH only needs to support two DMRS ports at most, only single-symbol DMRS frequency domain type 1 is supported, such as Fig.13 As shown, resource elements (RE) #0, RE #2, RE #4, RE #6, RE #8, and RE #10 correspond to port 0 / port 1.

[0091] In order to facilitate a better understanding of the embodiments of the present application, the sidelink-based positioning related to the present application is explained.

[0092] The 3rd Generation Partnership Project (3GPP) Radio Access Network (RAN) conducted studies on "NR Positioning Enhancement" and "Scenarios and Requirements for NR Positioning Use Cases in Coverage, Partial Coverage and Out of Coverage". The "Scenarios and Requirements for NR Positioning Use Cases in Coverage, Partial Coverage and Out of Coverage" study focused on V2X and public safety use cases. Positioning accuracy requirements were developed for Industrial Internet of Things (IIOT) use cases in out of coverage scenarios. 3GPP needs to study and develop sidelink positioning solutions to support the use cases, scenarios and requirements identified in these activities.

[0093] In order to facilitate a better understanding of the embodiments of the present application, the problems solved by the present application are explained.

[0094] In order to achieve sidelink-based positioning, it is necessary to send a valid positioning reference signal on the sidelink. However, there may be sidelink channels and signals sent to the backward terminal on the sidelink. In this case, there is no effective solution for how to send the positioning reference signal.

[0095] Based on the above problems, the present application proposes a solution for sending a reference signal for positioning. A first terminal device sends at least one reference signal and at least one side channel to a second terminal device within a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning. That is, the embodiment of the present application can achieve effective multiplexing of the reference signal for absolute positioning and / or relative positioning and at least one side channel, reduce the impact of the sending of the positioning reference signal on the channel listening, and provide effective positioning information.

[0096] The technical solution of the present application is described in detail below through specific embodiments.

[0097] Fig.14 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application, such as Fig.14 As shown, the wireless communication method 200 may include at least part of the following contents:

[0098] S210, the first terminal device sends at least one reference signal and at least one side channel to the second terminal device within a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning;

[0099] S220: The second terminal device receives the at least one reference signal and the at least one side channel sent by the first terminal device within the first time unit.

[0100] In an embodiment of the present application, the first terminal device can send the at least one reference signal and the at least one side channel within the first time unit. That is, the embodiment of the present application can achieve effective multiplexing of the reference signal for absolute positioning and / or relative positioning and at least one side channel, reduce the impact of the transmission of the positioning reference signal on the channel listening, and provide effective positioning information.

[0101] In the embodiment of the present application, the at least one reference signal is used for absolute positioning and / or relative positioning. That is, after receiving the at least one reference signal, the second terminal device can perform absolute positioning and / or relative positioning based on the at least one reference signal.

[0102] For example, the reference signals in the at least one reference signal are all used for absolute positioning, that is, the second terminal device can determine its global positioning coordinates based on the at least one reference signal.

[0103] For another example, the reference signals in the at least one reference signal are all used for relative positioning, that is, the second terminal device can determine its distance and / or direction relative to the first terminal device based on the at least one reference signal.

[0104] For another example, the at least one reference signal includes reference signal 1 and reference signal 2, wherein reference signal 1 is used for absolute positioning and reference signal 2 is used for relative positioning. That is, the second terminal device can determine its global positioning coordinates based on reference signal 1, and the second terminal device can determine its distance and / or direction relative to the first terminal device based on reference signal 2.

[0105] For another example, the at least one reference signal includes a reference signal 3, wherein the reference signal 3 is used for absolute positioning and relative positioning. That is, the second terminal device can determine its global positioning coordinates based on the reference signal 3, and the second terminal device can determine its distance and / or direction relative to the first terminal device based on the reference signal 3.

[0106] In some embodiments, the time unit is a time slot or a subframe. That is, the first time unit may be a time slot or a subframe. Preferably, the first time unit is a time slot. In addition, other time units in the embodiments of the present application may also be time slots or subframes, and the second time unit mentioned in the subsequent embodiments may also be a time slot or a subframe. Preferably, the second time unit is a time slot. Of course, the time unit may also be a symbol, or a frame, or a millisecond (ms), etc., which is not limited in the present application.

[0107] In some embodiments, the at least one side channel includes but is not limited to at least one of the following: PSSCH, PSCCH, PSFCH.

[0108] In an embodiment of the present application, the first terminal device may be a backward terminal, that is, a terminal that is compatible with previous protocol versions. Specifically, for the backward terminal, the resource pool for sending the reference signal for positioning may be the same as the resource pool for sending PSCCH / PSSCH, that is, the reference signal for positioning and PSCCH / PSSCH may be sent in the same time slot.

[0109] In some embodiments, the first terminal device sends redundant information to the second terminal device on the first resource within the first time unit. Specifically, the first terminal device sends redundant information to ensure the transmission bandwidth and transmission period of the at least one side channel (such as PSSCH) sent within the first time unit.

[0110] In some embodiments, when the data to be transmitted within the first time unit is less than a preset value, the first terminal device sends redundant information to the second terminal device on the first resource within the first time unit.

[0111] For example, the preset value is agreed upon by a protocol, or the preset value is configured by a network device, or the preset value is determined by the first terminal device, or the preset value is determined by negotiation between the first terminal device and the second terminal device.

[0112] In some embodiments, the first resource is determined by the first terminal device based on a transmission requirement of the at least one reference signal.

[0113] In some embodiments, the value range of the frequency domain resources occupied by the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the frequency domain resources occupied by the at least one reference signal is configured by a network device.

[0114] In some embodiments, the value range of the sending period corresponding to the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the sending period corresponding to the at least one reference signal is configured by a network device.

[0115] In some embodiments, the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is agreed upon by a protocol or preconfigured, or the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is configured by a network device.

[0116] In an embodiment of the present application, if the first terminal device is in the Mode 1 resource pool (i.e., the resource pool determined based on the above-mentioned first mode), and the base station is configured to report the positioning status, then if the first terminal device has accurate geographic location information, the positioning status should be reported to the base station. Alternatively, if the base station is configured to report relative positioning requirements, then when the first terminal device has a relative positioning requirement, the relative positioning requirement can be reported to the base station. The base station can allocate specific transmission resources (i.e., first resources) to the first terminal device, allowing the first terminal device to use part or all of the specific transmission resources to send redundant information. For example, if the first terminal device uses the lowest bit rate to send the data in the cache and it is still not enough to fill the specific transmission resource, the first terminal device allows the use of additional resources to send redundant information.

[0117] In an embodiment of the present application, if the first terminal device operates in a Mode 2 resource pool (i.e., a resource pool determined based on the above-mentioned second mode). If the resource pool allows terminals with accurate geographic location information to send redundant information, or the resource pool allows terminals with relative positioning requirements to send redundant information, then when the first terminal device performs resource selection, it can determine the size of the occupied frequency domain resources, the sending period, and the number of transmissions in each period according to the transmission requirements of the positioning reference signal. Preferably, the value range of one or more of the resource size, the sending period, and the number of transmissions in each period can be configured, pre-configured, or agreed upon by the base station. When the first terminal device uses the selected resources to send, if the first terminal device uses the lowest bit rate to send the data in the cache and it is still not enough to fill the sending resources, the first terminal device allows the sending of redundant information.

[0118] In an embodiment of the present application, by allowing terminals that meet the conditions for sending positioning signals to send redundant information, the bandwidth, period, number of times, etc. of the sent PSSCH DMRS can be guaranteed when the terminal does not have enough data to send, so as to ensure the accuracy of positioning.

[0119] It should be noted that the PSSCH DMRS may be: a DMRS sent via the PSSCH.

[0120] In embodiment 1, the at least one side channel includes at least a PSSCH, and the at least one reference signal is a DMRS transmitted through the PSSCH. That is, part or all of the PSSCH DMRS can be used as a reference signal for positioning.

[0121] In some implementations of Embodiment 1, the PSSCH satisfies at least one of the following:

[0122] The channel bandwidth occupied by the PSSCH is not less than W;

[0123] The PSSCH is sent periodically;

[0124] The PSSCH is sent periodically, and the number of times the PSSCH is sent in each period is not less than N;

[0125] The PSSCH is sent by selecting resources in the resource pool, and the value of the sidelink resource reselection counter (SL_RESOURCE_RESELECTION_COUNTER) is not less than C;

[0126] The PSSCH is sent via the authorized resources configured by the network device;

[0127] Wherein, W, N and C are all positive integers, and the values ​​of W, N and C are agreed upon or pre-configured by the protocol, or the values ​​of W, N and C are configured by the network device.

[0128] It should be noted that the method of selecting resources in the resource pool can be the second mode mentioned above. SL_RESOURCE_RESELECTION_COUNTER indicates the number of cycles during which the first terminal device can use the resource after reselecting the resource according to Mode 2. For example, if the value of W is not less than 24 PRBs and the PSSCH is sent periodically, the DMRS of the PSSCH can be used as a positioning reference signal.

[0129] In some implementations of Embodiment 1, the PSSCH carries first indication information, or the PSCCH used to schedule the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning. Specifically, the second terminal device can obtain the at least one reference signal based on the first indication information, and perform absolute positioning and / or relative positioning according to the at least one reference signal.

[0130] For example, in Example 1, if the DMRS sent through the PSSCH is used for absolute positioning, when the first terminal device has accurate geographic location information (for example, it can receive accurate GNSS signals), the PSSCH can be used to indicate that the DMRS of the PSSCH can be used for absolute positioning, or the PSCCH that schedules the PSSCH can be used to indicate that the DMRS of the PSSCH can be used for absolute positioning. For example, in the PSCCH that schedules the PSSCH, 1 bit is used to indicate that the DMRS of the scheduled PSSCH can be used for absolute positioning. Alternatively, if the DMRS sent through the PSSCH is used for relative positioning, the first terminal device can indicate that the DMRS of the PSSCH can be used for relative positioning through the PSSCH, or the first terminal device can indicate that the DMRS of the PSSCH can be used for relative positioning through the PSCCH that schedules the PSSCH.

[0131] In Embodiment 2, the at least one side channel includes at least PSSCH, and the at least one reference signal includes M1 first-type reference signals and M2 second-type reference signals, where M1 and M2 are both positive integers; wherein the M1 first-type reference signals are DMRS sent via the PSSCH, and the M2 second-type reference signals are positioning reference signals (PRS) sent within the time-frequency range of the PSSCH. That is, in Embodiment 2, the reference signal that can be used for positioning includes the DMRS sent via the PSSCH, and in addition thereto, other reference signals may also be included, such as the PRS sent within the time-frequency range of the PSSCH.

[0132] In some implementations of Embodiment 2, the PSSCH satisfies at least one of the following:

[0133] The channel bandwidth occupied by the PSSCH is not less than W;

[0134] The PSSCH is sent periodically;

[0135] The PSSCH is sent periodically, and the number of times the PSSCH is sent in each period is not less than N;

[0136] The PSSCH is sent by selecting resources in the resource pool, and the value of the sidelink resource reselection counter (SL_RESOURCE_RESELECTION_COUNTER) is not less than C;

[0137] The PSSCH is sent via the authorized resources configured by the network device;

[0138] Wherein, W, N and C are all positive integers, and the values ​​of W, N and C are agreed upon or pre-configured by the protocol, or the values ​​of W, N and C are configured by the network device.

[0139] It should be noted that the method of selecting resources in the resource pool can be the second mode mentioned above. SL_RESOURCE_RESELECTION_COUNTER indicates the number of cycles during which the first terminal device can use the resource after reselecting the resource according to Mode 2. For example, if the value of W is not less than 24 PRBs and the PSSCH is sent periodically, the DMRS of the PSSCH can be used as a positioning reference signal.

[0140] In some implementations of Example 2, the PSSCH carries first indication information, or the PSCCH used to schedule the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning. For example, in the PSCCH that schedules the PSSCH, 1 bit is used to indicate that the scheduled PSSCH contains a reference signal for positioning. Specifically, the second terminal device can obtain the at least one reference signal based on the first indication information, and perform absolute positioning and / or relative positioning according to the at least one reference signal.

[0141] In Embodiment 2, Example 1, the M2 second-type reference signals are sent via OFDM symbols adjacent to one or more DMRS symbols of the PSSCH.

[0142] Optionally, in Example 1, the resource elements (REs) occupied by the PRS sent on adjacent symbols are different from the REs occupied by the DMRS. For example, the DMRS on the DMRS symbol occupies odd REs, and the PRS on the adjacent symbol occupies even REs. An example is Fig.15 shown.

[0143] Optionally, in Example 1, the DMRS sequence sent on adjacent symbols is the same as the PRS sequence. For example, the DMRS sequence sent on an OFDM symbol and the PRS sequence sent on an OFDM symbol adjacent to it may be the same. In this way, the DMRS density used for positioning in the frequency domain can be guaranteed, while ensuring that the DMRS at the DMRS position determined according to the existing rules remains unchanged, thereby avoiding the impact on the backward terminal channel monitoring.

[0144] Optionally, in Example 1, when the first terminal device performs rate matching on the PSSCH, the number of REs occupied by the PRS is not considered, and when performing resource mapping on the PSSCH modulation symbols, the PSSCH modulation symbols mapped to the PRS REs should be punctured.

[0145] Optionally, in Example 1, the second terminal device can determine whether the PSSCH contains a reference signal for positioning based on the corresponding indication information in the PSCCH or PSSCH sent by the first terminal device. If it contains a reference signal for positioning, the second terminal device can calculate the positioning information based on the DMRS of the PSSCH sent by the first terminal device and the additionally sent PRS.

[0146] In embodiment 2, example 2, the M2 reference signals are sent through K OFDM symbols, the K OFDM symbols are obtained by adjusting the RE positions occupied by DMRS on K DMRS symbols, and the K DMRS symbols are different from the DMRS symbols occupied by the M1 first-class reference signals, and K is a positive integer.

[0147] Optionally, in Example 2, the DMRS sent on the K DMRS symbols are not used for channel sensing; and / or, the DMRS sent via the PSCCH in the first time unit is used for channel sensing.

[0148] Specifically, in Example 2, if the first terminal device sends a reference signal for absolute positioning or relative positioning, and the PSSCH time domain sent simultaneously contains multiple DMRS symbols, the position of the RE occupied by the DMRS on one or more DMRS symbols can be changed, and the DMRS sent on other OFDM symbols can be combined as the positioning reference signal. For example, the position of the RE occupied by the DMRS on the i-th DMRS symbol remains unchanged, and the RE occupied by the DMRS on the i+1-th DMRS symbol is increased by one relative to the RE position of the original DMRS. For example, Fig.16 As shown, three DMRS symbols are sent in PSSCH. In each DMRS symbol, the REs occupied by DMRS are RE#0, RE#2, RE#4, RE#6, RE#8 and RE#10 in a PRB. The RE positions occupied by DMRS sent in the first DMRS symbol and the third DMRS symbol remain unchanged, and the RE positions occupied by DMRS sent in the second DMRS symbol are increased by 1 relative to the initial positions, i.e., RE#1, RE#3, RE#5, RE#7, RE#9 and RE#11. Since the DMRS sent in the second DMRS symbol changes, the backward terminal cannot use the DMRS for channel sensing. Preferably, in this case, the resource pool should be configured to perform channel sensing through the DMRS of PSCCH. In this way, the DMRS density used for positioning in the frequency domain can be guaranteed.

[0149] In Embodiment 2, Example 3, the M2 second-type reference signals are sent through REs not occupied by DMRS in the DMRS symbols occupied by the M1 first-type reference signals.

[0150] Optionally, in Example 3, the DMRS sequence and PRS sequence sent on the same DMRS symbol are the same.

[0151] Specifically, in Example 3, if the first terminal device sends a reference signal for absolute positioning or relative positioning, the first terminal device sends an additional PRS on REs not occupied by DMRS in one or more DMRS symbols of the PSSCH sent simultaneously, and combines the DMRS sent on the OFDM symbol as a positioning reference signal. Fig.17 As shown, three DMRS symbols are sent in PSSCH. On each DMRS symbol, the REs occupied by DMRS are RE#0, RE#2, RE#4, RE#6, RE#8 and RE#10 within a PRB. On the REs not occupied by DMRS, i.e., RE#1, RE#3, RE#5, RE#7, RE#9 and RE#11, the first terminal device sends an additional PRS.

[0152] Optionally, in Example 3, when the first terminal device performs rate matching on the PSSCH, the number of REs occupied by the additionally transmitted PRS is not considered, and when performing resource mapping on the PSSCH modulation symbols, the PSSCH modulation symbols mapped to the PRSRE should be punctured.

[0153] In Example 3, the DMRS sequence sent on the DMRS symbol and the PRS sequence sent on the symbol can be the same. In this way, the DMRS density used for positioning in the frequency domain can be guaranteed, while the DMRS at the DMRS position determined according to the existing rules is guaranteed to remain unchanged, thereby avoiding the impact on the backward terminal channel monitoring.

[0154] In some implementations of Example 2, when performing rate matching on the PSSCH, the first terminal device does not consider the number of REs occupied by the M2 second-type reference signals; and / or, when performing resource mapping on the modulation symbols of the PSSCH, the first terminal device punctures the PSSCH modulation symbols mapped to the REs occupied by the M2 second-type reference signals.

[0155] In Embodiment 3, the at least one side channel includes at least PSSCH, and the at least one reference signal includes M3 third-category reference signals and M4 fourth-category reference signals, where M3 and M4 are both positive integers; wherein the M3 third-category reference signals are DMRS sent via the PSSCH, and the M4 fourth-category reference signals are PRS sent outside the time-frequency range of the PSSCH. That is, in Embodiment 3, the reference signal that can be used for positioning includes the DMRS sent via the PSSCH, and in addition thereto, other reference signals may also be included, such as PRS sent outside the time-frequency range of the PSSCH.

[0156] In some implementations of Embodiment 3, the PSSCH satisfies at least one of the following:

[0157] The channel bandwidth occupied by the PSSCH is not less than W;

[0158] The PSSCH is sent periodically;

[0159] The PSSCH is sent periodically, and the number of times the PSSCH is sent in each period is not less than N;

[0160] The PSSCH is sent by selecting resources in the resource pool, and the value of the sidelink resource reselection counter (SL_RESOURCE_RESELECTION_COUNTER) is not less than C;

[0161] The PSSCH is sent via the authorized resources configured by the network device;

[0162] Wherein, W, N and C are all positive integers, and the values ​​of W, N and C are agreed upon or pre-configured by the protocol, or the values ​​of W, N and C are configured by the network device.

[0163] It should be noted that the method of selecting resources in the resource pool can be the second mode mentioned above. SL_RESOURCE_RESELECTION_COUNTER indicates the number of cycles during which the first terminal device can use the resource after reselecting the resource according to Mode 2. For example, if the value of W is not less than 24 PRBs and the PSSCH is sent periodically, the DMRS of the PSSCH can be used as a positioning reference signal.

[0164] In some implementations of Example 3, the PSSCH carries first indication information, or the PSCCH used to schedule the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning. For example, in the PSCCH that schedules the PSSCH, 1 bit is used to indicate that the scheduled PSSCH contains a reference signal for positioning. Specifically, the second terminal device can obtain the at least one reference signal based on the first indication information, and perform absolute positioning and / or relative positioning according to the at least one reference signal.

[0165] In Embodiment 3, Example 4, the M4 fourth-type reference signals are sent via the first OFDM symbol for sidelink in the first time unit.

[0166] Optionally, in Example 4, the M4 fourth-category reference signals are sent through REs at odd positions on the first OFDM symbol for side travel within the first time unit, or the M4 fourth-category reference signals are sent through REs at even positions on the first OFDM symbol for side travel within the first time unit.

[0167] Specifically, in Example 4, the PRS is located in the first OFDM symbol for sideline in the time slot, that is, the AGC symbol. The first terminal device can send a comb-shaped PRS on the AGC symbol, for example, only sending PRS on odd or even REs, so that the second terminal device can perform AGC adjustment on the starting half symbol of the first OFDM symbol for sideline, and use the second half symbol for positioning measurement.

[0168] In Embodiment 3, Example 5, the M4 fourth-type reference signals are sent through the second resource within the first time unit; wherein the second resource is distributed in at least one OFDM symbol within the first time unit with a first period.

[0169] Optionally, in Example 5, the at least one OFDM symbol does not overlap with an OFDM symbol used for sideline transmission in the first time unit, or the at least one OFDM symbol overlaps with at most one OFDM symbol among the OFDM symbols used for sideline transmission in the first time unit.

[0170] Optionally, in Example 5, the index of the first OFDM symbol used for PRS transmission in the first time unit is not greater than the index of the first OFDM symbol used for sidelink in the first time unit.

[0171] Optionally, in Example 5, the first period is agreed upon or preconfigured by a protocol, or the first period is configured by a network device; and / or the at least one OFDM symbol is agreed upon or preconfigured by a protocol, or the at least one OFDM symbol is configured by a network device.

[0172] Specifically, the first time unit is a time slot, and the resources for PRS transmission appear in one or more OFDM symbols in the time slot with a certain period, and the one or more OFDM symbols do not overlap with the OFDM symbols configured for the side transmission of the backward terminal at all, or overlap with at most one of the OFDM symbols. Preferably, the period of resources used for PRS transmission and the OFDM symbols in the time slot are configured or pre-configured by the base station, and the index of the first OFDM symbol that can be used for PRS transmission in a time slot is not greater than the first OFDM symbol used for side transmission configured by sl-startSLsymbols in the time slot. For example, the starting point of the OFDM symbol for PRS transmission is configured by the side PRS start side symbol (sl-PRS-startSLsymbols), and the number of OFDM symbols used for PRS transmission continuously starting from sl-PRS-startSLsymbols is configured by the side PRS length symbol (sl-PRS-LengthSymbols). For example, as Fig.18As shown, sl-PRS-startSLsymbols=0, sl-PRS-startSLsymbols=3.

[0173] Optionally, in Example 5, when no transmission resources dedicated to PRS are configured in the second time unit in the resource pool, transmission of PSCCH and / or PSSCH is allowed on OFDM symbols that can be used for PRS transmission and are configured in the second time unit.

[0174] Specifically, if a time slot in a resource pool is not configured with PRS transmission resources, the OFDM symbols configured in the time slot that can be used for PRS transmission can be used for the transmission of PSCCH and / or PSSCH of the terminal that can identify the configuration signaling, and the backward terminal still uses the OFDM symbols configured by the two parameters sl-startSLsymbols and sl-LengthSymbols to transmit the side channel. For example, if the period of a dedicated PRS in a resource pool is 10 time slots, located in the time slots indexed as #0, #10, #20, ..., then the OFDM symbols configured by sl-PRS-startSLsymbols=0 and sl-PRS-startSLsymbols in these time slots are used to send dedicated PRS, and in other time slots, these OFDM symbols are used to send PSCCH and / or PSSCH.

[0175] Optionally, in Example 5, PRS is always transmitted together with PSSCH, and the PRB occupied by PRS is the same as the PRB occupied by PSSCH transmitted together.

[0176] Therefore, in the embodiment of the present application, the first terminal device sends at least one reference signal and at least one side channel to the second terminal device within the first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning. That is, the embodiment of the present application can realize the effective multiplexing of the reference signal used for absolute positioning and / or relative positioning and at least one side channel, reduce the influence of the sending of the positioning reference signal on the channel listening, and provide effective positioning information.

[0177] In an embodiment of the present application, the reference signal used for positioning may be the DMRS of the PSSCH, or the reference signal used for positioning may be the DMRS of the PSSCH and other additionally transmitted reference signals. Other additionally transmitted signals may be transmitted within the time-frequency range of the PSSCH, occupying symbols where the DMRS is located or symbols adjacent to the DMRS; or, other additionally transmitted signals may be located on side symbols in the time slot that are different from those used by the backward terminal. According to the method proposed in the present application, effective multiplexing of reference signals used for positioning and channels such as PSCCH, PSSCH, and PSFCH may be achieved, reducing the impact of the transmission of positioning reference signals on the channel monitoring of backward terminals, and providing effective positioning information.

[0178] Combination of the above Figures 14 to 18 , describes in detail the method embodiment of the present application, and the following is combined with Figure 19 to Figure 20 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0179] Fig.19 Schematic block diagram of a terminal device 300 according to an embodiment of the present application is shown. The terminal device 300 is a first terminal device, such as Fig.19 As shown, the terminal device 300 includes:

[0180] The communication unit 310 is used to send at least one reference signal and at least one side channel to the second terminal device within a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning.

[0181] In some embodiments, the communication unit 310 is further configured to send redundant information to the second terminal device on a first resource within the first time unit.

[0182] In some embodiments, the communication unit 310 is specifically used to:

[0183] When the amount of data to be transmitted within the first time unit is less than a preset value, redundant information is sent to the second terminal device on the first resource within the first time unit.

[0184] In some embodiments, the first resource is determined by the first terminal device based on a transmission requirement of the at least one reference signal.

[0185] In some embodiments, the value range of the frequency domain resources occupied by the at least one reference signal is agreed upon or preconfigured by a protocol, or the value range of the frequency domain resources occupied by the at least one reference signal is configured by a network device; and / or,

[0186] The value range of the transmission period corresponding to the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the transmission period corresponding to the at least one reference signal is configured by a network device; and / or,

[0187] The range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is agreed upon by the protocol or pre-configured, or the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is configured by the network device.

[0188] In some embodiments, the at least one sidelink channel includes at least a physical sidelink shared channel PSSCH, and the at least one reference signal is a demodulation reference signal DMRS sent via the PSSCH.

[0189] In some embodiments, the at least one side channel includes at least a PSSCH, and the at least one reference signal includes M1 first-type reference signals and M2 second-type reference signals, where M1 and M2 are both positive integers;

[0190] The M1 first-type reference signals are DMRS sent through the PSSCH, and the M2 second-type reference signals are positioning reference signals PRS sent within the time-frequency range of the PSSCH.

[0191] In some embodiments, the M2 second-type reference signals are sent via orthogonal frequency division multiplexing OFDM symbols adjacent to one or more DMRS symbols of the PSSCH.

[0192] In some embodiments, the resource elements REs occupied by the PRS transmitted on adjacent symbols are different from the REs occupied by the DMRS.

[0193] In some embodiments, the DMRS sequence sent on adjacent symbols is the same as the PRS sequence.

[0194] In some embodiments, the M2 reference signals are sent via K OFDM symbols, the K OFDM symbols are obtained by adjusting RE positions occupied by DMRS on K DMRS symbols, and the K DMRS symbols are different from the DMRS symbols occupied by the M1 first type reference signals, and K is a positive integer.

[0195] In some embodiments, the DMRS sent on the K DMRS symbols are not used for channel sensing; and / or,

[0196] The DMRS sent through the physical sidelink control channel PSCCH in the first time unit is used for channel sensing.

[0197] In some embodiments, the M2 second-type reference signals are sent through REs not occupied by DMRS in the DMRS symbols occupied by the M1 first-type reference signals.

[0198] In some embodiments, the DMRS sequence and the PRS sequence sent on the same DMRS symbol are the same.

[0199] In some embodiments, the terminal device 300 further includes: a processing unit 320;

[0200] When performing rate matching on the PSSCH, the processing unit 320 is used to ignore the number of REs occupied by the M2 second-type reference signals; and / or,

[0201] When performing resource mapping on the modulation symbols of the PSSCH, the processing unit 320 is used to puncture the PSSCH modulation symbols mapped to the REs occupied by the M2 second-type reference signals.

[0202] In some embodiments, the at least one side channel includes at least a PSSCH, and the at least one reference signal includes M3 third-type reference signals and M4 fourth-type reference signals, where M3 and M4 are both positive integers;

[0203] Among them, the M3 third-type reference signals are DMRS sent through the PSSCH, and the M4 fourth-type reference signals are PRS sent outside the time-frequency range of the PSSCH.

[0204] In some embodiments, the M4 fourth-type reference signals are sent via the first OFDM symbol for sidelink in the first time unit.

[0205] In some embodiments, the M4 fourth-type reference signals are sent through REs at odd positions on the first OFDM symbol for side travel within the first time unit, or the M4 fourth-type reference signals are sent through REs at even positions on the first OFDM symbol for side travel within the first time unit.

[0206] In some embodiments, the M4 fourth-type reference signals are sent via a second resource within the first time unit;

[0207] The second resource is distributed in at least one OFDM symbol in the first time unit with a first period.

[0208] In some embodiments, the at least one OFDM symbol does not overlap with an OFDM symbol used for sideline transmission in the first time unit, or the at least one OFDM symbol overlaps with at most one OFDM symbol among the OFDM symbols used for sideline transmission in the first time unit.

[0209] In some embodiments, the index of the first OFDM symbol used for PRS transmission in the first time unit is not greater than the index of the first OFDM symbol used for sidelink in the first time unit.

[0210] In some embodiments, the first period is agreed upon or preconfigured by a protocol, or the first period is configured by a network device; and / or the at least one OFDM symbol is agreed upon or preconfigured by a protocol, or the at least one OFDM symbol is configured by a network device.

[0211] In some embodiments, when no transmission resources dedicated to PRS are configured in a second time unit in the resource pool, transmission of PSCCH and / or PSSCH is allowed on OFDM symbols that are configured in the second time unit and can be used for PRS transmission.

[0212] In some embodiments, the PSSCH satisfies at least one of the following:

[0213] The channel bandwidth occupied by the PSSCH is not less than W;

[0214] The PSSCH is sent periodically;

[0215] The PSSCH is sent periodically, and the number of times the PSSCH is sent in each period is not less than N;

[0216] The PSSCH is sent by selecting resources in a resource pool, and the value of the sidelink resource reselection counter is not less than C;

[0217] The PSSCH is sent via the authorized resources configured by the network device;

[0218] Wherein, W, N and C are all positive integers, and the values ​​of W, N and C are agreed upon or pre-configured by the protocol, or the values ​​of W, N and C are configured by the network device.

[0219] In some embodiments, the PSSCH carries first indication information, or the PSCCH used for scheduling the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning.

[0220] In some embodiments, the at least one sidelink channel includes at least one of the following: PSSCH, PSCCH, physical sidelink feedback channel PSFCH.

[0221] In some embodiments, the time unit is a time slot or a subframe.

[0222] 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.

[0223] It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the first terminal device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the terminal device 300 are respectively to implement Figures 14 to 18 The corresponding process of the first terminal device in the method 200 shown in FIG. 2 is not repeated here for the sake of brevity.

[0224] Fig. 20 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. The terminal device 400 is a second terminal device, such as Fig. 20 As shown, the terminal device 400 includes:

[0225] The communication unit 410 is used to receive at least one reference signal and at least one side channel sent by the first terminal device within the first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning.

[0226] In some embodiments, the communication unit 410 is further used to receive redundant information sent by the first terminal device on the first resource within the first time unit.

[0227] In some embodiments, the redundant information is sent by the first terminal device when the data to be transmitted within the first time unit is less than a preset value.

[0228] In some embodiments, the first resource is determined by the first terminal device based on a transmission requirement of the at least one reference signal.

[0229] In some embodiments, the value range of the frequency domain resources occupied by the at least one reference signal is agreed upon or preconfigured by a protocol, or the value range of the frequency domain resources occupied by the at least one reference signal is configured by a network device; and / or,

[0230] The value range of the transmission period corresponding to the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the transmission period corresponding to the at least one reference signal is configured by a network device; and / or,

[0231] The range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is agreed upon by the protocol or pre-configured, or the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is configured by the network device.

[0232] In some embodiments, the at least one sidelink channel includes at least a physical sidelink shared channel PSSCH, and the at least one reference signal is a demodulation reference signal DMRS sent via the PSSCH.

[0233] In some embodiments, the at least one side channel includes at least a PSSCH, and the at least one reference signal includes M1 first-type reference signals and M2 second-type reference signals, where M1 and M2 are both positive integers;

[0234] The M1 first-type reference signals are DMRS sent through the PSSCH, and the M2 second-type reference signals are positioning reference signals PRS sent within the time-frequency range of the PSSCH.

[0235] In some embodiments, the M2 second-type reference signals are sent via orthogonal frequency division multiplexing OFDM symbols adjacent to one or more DMRS symbols of the PSSCH.

[0236] In some embodiments, the resource elements REs occupied by the PRS transmitted on adjacent symbols are different from the REs occupied by the DMRS.

[0237] In some embodiments, the DMRS sequence sent on adjacent symbols is the same as the PRS sequence.

[0238] In some embodiments, the M2 reference signals are sent via K OFDM symbols, the K OFDM symbols are obtained by adjusting RE positions occupied by DMRS on K DMRS symbols, and the K DMRS symbols are different from the DMRS symbols occupied by the M1 first type reference signals, and K is a positive integer.

[0239] In some embodiments, the DMRS sent on the K DMRS symbols are not used for channel sensing; and / or,

[0240] The DMRS sent through the physical sidelink control channel PSCCH in the first time unit is used for channel sensing.

[0241] In some embodiments, the M2 second-type reference signals are sent through REs not occupied by DMRS in the DMRS symbols occupied by the M1 first-type reference signals.

[0242] In some embodiments, the DMRS sequence and the PRS sequence sent on the same DMRS symbol are the same.

[0243] In some embodiments, when performing rate matching on the PSSCH, the number of REs occupied by the M2 second-type reference signals is not considered; and / or, when performing resource mapping on the modulation symbols of the PSSCH, puncturing is performed on the PSSCH modulation symbols mapped to the REs occupied by the M2 second-type reference signals.

[0244] In some embodiments, the at least one side channel includes at least a PSSCH, and the at least one reference signal includes M3 third-type reference signals and M4 fourth-type reference signals, where M3 and M4 are both positive integers;

[0245] Among them, the M3 third-type reference signals are DMRS sent through the PSSCH, and the M4 fourth-type reference signals are PRS sent outside the time-frequency range of the PSSCH.

[0246] In some embodiments, the M4 fourth-type reference signals are sent via the first OFDM symbol for sidelink in the first time unit.

[0247] In some embodiments, the M4 fourth-type reference signals are sent through REs at odd positions on the first OFDM symbol for side travel within the first time unit, or the M4 fourth-type reference signals are sent through REs at even positions on the first OFDM symbol for side travel within the first time unit.

[0248] In some embodiments, the M4 fourth-type reference signals are sent via a second resource within the first time unit;

[0249] The second resource is distributed in at least one OFDM symbol in the first time unit with a first period.

[0250] In some embodiments, the at least one OFDM symbol does not overlap with an OFDM symbol used for sideline transmission in the first time unit, or the at least one OFDM symbol overlaps with at most one OFDM symbol among the OFDM symbols used for sideline transmission in the first time unit.

[0251] In some embodiments, the index of the first OFDM symbol used for PRS transmission in the first time unit is not greater than the index of the first OFDM symbol used for sidelink in the first time unit.

[0252] In some embodiments, the first period is agreed upon or preconfigured by a protocol, or the first period is configured by a network device; and / or the at least one OFDM symbol is agreed upon or preconfigured by a protocol, or the at least one OFDM symbol is configured by a network device.

[0253] In some embodiments, when no transmission resources dedicated to PRS are configured in a second time unit in the resource pool, transmission of PSCCH and / or PSSCH is allowed on OFDM symbols that are configured in the second time unit and can be used for PRS transmission.

[0254] In some embodiments, the PSSCH satisfies at least one of the following:

[0255] The channel bandwidth occupied by the PSSCH is not less than W;

[0256] The PSSCH is sent periodically;

[0257] The PSSCH is sent periodically, and the number of times the PSSCH is sent in each period is not less than N;

[0258] The PSSCH is sent by selecting resources in a resource pool, and the value of the sidelink resource reselection counter is not less than C;

[0259] The PSSCH is sent via the authorized resources configured by the network device;

[0260] Wherein, W, N and C are all positive integers, and the values ​​of W, N and C are agreed upon or pre-configured by the protocol, or the values ​​of W, N and C are configured by the network device.

[0261] In some embodiments, the PSSCH carries first indication information, or the PSCCH used for scheduling the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning.

[0262] In some embodiments, the at least one sidelink channel includes at least one of the following: PSSCH, PSCCH, physical sidelink feedback channel PSFCH.

[0263] In some embodiments, the time unit is a time slot or a subframe.

[0264] 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.

[0265] It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the second terminal device in the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the terminal device 400 are respectively to implement Figures 14 to 18 The corresponding process of the second terminal device in the method 200 shown in FIG. 2 is not repeated here for the sake of brevity.

[0266] Fig.21 It is a schematic structural diagram of a communication device 500 provided in an embodiment of the present application. Fig.21 The communication device 500 shown includes a processor 510, and the processor 510 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0267] In some embodiments, Fig.21 As shown, the communication device 500 may further include a memory 520. The processor 510 may call and run a computer program from the memory 520 to implement the method in the embodiment of the present application.

[0268] The memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .

[0269] In some embodiments, Fig.21 As shown, the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0270] The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, and the number of the antennas may be one or more.

[0271] In some embodiments, the communication device 500 may specifically be the first terminal device of the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the first terminal device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0272] In some embodiments, the communication device 500 may specifically be the second terminal device of the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the second terminal device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0273] Fig. 22 It is a schematic structural diagram of the device of an embodiment of the present application. Fig. 22 The device 600 shown 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.

[0274] In some embodiments, Fig. 22 As shown, the apparatus 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0275] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0276] In some embodiments, the apparatus 600 may further include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0277] In some embodiments, the apparatus 600 may further include an output interface 640. The processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0278] In some embodiments, the apparatus may be applied to the first terminal device in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the first terminal device in the various methods in the embodiments of the present application, which will not be described in detail here for the sake of brevity.

[0279] In some embodiments, the apparatus may be applied to a second terminal device in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the second terminal device in each method of the embodiments of the present application, which will not be described in detail here for the sake of brevity.

[0280] In some embodiments, the device mentioned in the embodiments of the present application may also be a chip, for example, a system-on-chip, a system-on-chip, a chip system, or a system-on-chip chip.

[0281] Fig.23 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. Fig.23 As shown, the communication system 700 includes a first terminal device 710 and a second terminal device 720 .

[0282] Among them, the first terminal device 710 can be used to implement the corresponding functions implemented by the first terminal device in the above method, and the second terminal device 720 can be used to implement the corresponding functions implemented by the second terminal device in the above method. For the sake of brevity, they will not be repeated here.

[0283] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. 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.

[0284] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can 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 can 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.

[0285] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0286] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0287] In some embodiments, the computer-readable storage medium can be applied to the first terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0288] In some embodiments, the computer-readable storage medium can be applied to the second terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the second terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0289] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0290] In some embodiments, the computer program product can be applied to the first 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 first terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0291] In some embodiments, the computer program product can be applied to the second 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 second terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0292] The embodiment of the present application also provides a computer program.

[0293] In some embodiments, the computer program can be applied to the first 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 first terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0294] In some embodiments, the computer program can be applied to the second 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 second terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0295] Those of ordinary skill 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 to be beyond the scope of this application.

[0296] Those skilled in the art can 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.

[0297] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0298] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0299] 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.

[0300] 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. In view of such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform 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.

[0301] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The first terminal device sends at least one reference signal and at least one side channel to the second terminal device within a first time unit; Therein, the at least one reference signal is used for absolute positioning and / or relative positioning.

2. The method according to claim 1, characterized in that The method further comprises: The first terminal device sends redundant information to the second terminal device on a first resource within the first time unit.

3. The method according to claim 2, characterized in that The first terminal device sends redundant information to the second terminal device on a first resource within the first time unit, including: When the amount of data to be transmitted within the first time unit is less than a preset value, the first terminal device sends redundant information to the second terminal device on the first resource within the first time unit.

4. The method according to claim 2 or 3, characterized in that The first resource is determined by the first terminal device based on a transmission requirement of the at least one reference signal.

5. The method according to claim 4, characterized in that The value range of the frequency domain resources occupied by the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the frequency domain resources occupied by the at least one reference signal is configured by a network device; and / or, The value range of the transmission period corresponding to the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the transmission period corresponding to the at least one reference signal is configured by a network device; and / or, The range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is agreed upon or pre-configured by the protocol, or the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is configured by the network device.

6. The method according to any one of claims 1 to 5, characterized in that The at least one side channel includes at least a PSSCH, and the at least one reference signal includes M1 first-type reference signals and M2 second-type reference signals, where M1 and M2 are both positive integers; The M1 first-type reference signals are DMRS sent through the PSSCH, and the M2 second-type reference signals are positioning reference signals PRS sent within the time-frequency range of the PSSCH.

7. The method according to claim 6, characterized in that The M2 second-type reference signals are sent via orthogonal frequency division multiplexing OFDM symbols adjacent to one or more DMRS symbols of the PSSCH.

8. The method according to claim 6 or 7, characterized in that The PSSCH carries first indication information, or the PSCCH used for scheduling the PSSCH carries first indication information; wherein the first indication information is used to indicate that the at least one reference signal is used for absolute positioning and / or relative positioning.

9. The method according to any one of claims 1 to 8, characterized in that The at least one sidelink channel includes at least one of the following: PSSCH, PSCCH, and physical sidelink feedback channel PSFCH.

10. The method according to any one of claims 1 to 9, characterized in that The time unit is a time slot or a subframe.

11. A wireless communication method, characterized in that: include: The second terminal device receives at least one reference signal and at least one side channel sent by the first terminal device within a first time unit; wherein the at least one reference signal is used for absolute positioning and / or relative positioning.

12. The method according to claim 11, characterized in that The method further comprises: The second terminal device receives redundant information sent by the first terminal device on the first resource within the first time unit; The redundant information is sent by the first terminal device when the data to be transmitted within the first time unit is less than a preset value.

13. The method according to claim 12, characterized in that The first resource is determined by the first terminal device based on a transmission requirement of the at least one reference signal; The value range of the frequency domain resources occupied by the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the frequency domain resources occupied by the at least one reference signal is configured by a network device; and / or, The value range of the transmission period corresponding to the at least one reference signal is agreed upon or pre-configured by a protocol, or the value range of the transmission period corresponding to the at least one reference signal is configured by a network device; and / or, The range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is agreed upon or pre-configured by the protocol, or the range of values ​​of the number of times the reference signal is sent in each period in the sending period corresponding to the at least one reference signal is configured by the network device.

14. 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, so that the terminal device executes the method as described in any one of claims 1 to 10, or the terminal device executes the method as described in any one of claims 11 to 13.

Images