Lateral communication method, device, equipment, storage medium and program product

Abstract

The invention discloses a sidewalk communication method and device, equipment, a storage medium and a program product, and relates to the technical field of communication. The method comprises: a first terminal device transmitting first information, the first information being used for indicating a transmission mode of an SL PRS (1210). The first terminal device sends the first information used for indicating the sending mode of the SL PRS to the second terminal device, and instructs the second terminal device to receive the SL PRS, so that the resource utilization efficiency on a sidewalk carrier and the performance of a sidewalk positioning and sidewalk communication system are improved.

Description

[0001] This application is a divisional application of the PCT international patent application PCT / CN2022 / 123348 with an application date of September 30, 2022, which entered the Chinese national phase with Chinese patent application number 202280097370.4 and the invention name being "Side communication method, device, equipment, storage medium and program product". Technical Field

[0002] The embodiments of the present application relate to the field of communication technology, and in particular to a sideline communication method, apparatus, device, storage medium and program product. Background Art

[0003] In SL (Sidelink) communication, SL PRS (Sidelink Positioning Reference Signal) is introduced. Based on this, the sidelink communication process between terminal devices needs further research. Summary of the invention

[0004] The embodiments of the present application provide a sideline communication method, device, equipment, storage medium and program product. The technical solution is as follows:

[0005] According to one aspect of an embodiment of the present application, a sideline communication method is provided, the method being executed by a first terminal device, the method comprising:

[0006] Send first information, where the first information is used to indicate a sending method of the SL PRS.

[0007] According to one aspect of an embodiment of the present application, a sideline communication method is provided, the method being executed by a second terminal device, the method comprising:

[0008] First information is received, where the first information is used to indicate a sending method of the SL PRS.

[0009] According to one aspect of an embodiment of the present application, a side communication device is provided, the device comprising:

[0010] The sending module is used to send first information, where the first information is used to indicate the sending method of the SL PRS.

[0011] According to one aspect of an embodiment of the present application, a side communication device is provided, the device comprising:

[0012] The receiving module is used to receive first information, where the first information is used to indicate a sending method of the SL PRS.

[0013] According to one aspect of an embodiment of the present application, a terminal device is provided, the terminal device comprising a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the above-mentioned sideline communication method.

[0014] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is used to be executed by a processor to implement the above-mentioned side communication method.

[0015] According to one aspect of an embodiment of the present application, a chip is provided, wherein the chip includes a programmable logic circuit and / or program instructions, and when the chip is running, it is used to implement the above-mentioned side communication method.

[0016] According to one aspect of an embodiment of the present application, a computer program product is provided, which includes a computer program stored in a computer-readable storage medium, and a processor reads and executes the computer program from the computer-readable storage medium to implement the above-mentioned side communication method.

[0017] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0018] The first information for indicating the sending method of SL PRS is sent to the second terminal device through the first terminal device, instructing the second terminal to receive SL PRS, thereby improving the resource utilization efficiency on the sidecarrier and the performance of the sidecar positioning and sidecar communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of sideline communication within the coverage area of ​​a network provided by an embodiment of the present application;

[0021] Figure 3 It is a schematic diagram of partial network coverage side communication provided by an embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of line communication outside the network coverage provided by an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of unicast provided by an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of multicast provided by an embodiment of the present application;

[0025] Figure 7is a schematic diagram of broadcasting provided by an embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of NR-V2X time domain resource allocation provided by an embodiment of the present application;

[0027] Fig. 9 is a schematic diagram of a PSCCH and PSSCH time slot structure provided by an embodiment of the present application;

[0028] Fig.10 It is a schematic diagram of the time domain positions of 4 DMRS symbols when the number of PSSCH symbols is 13 provided by an embodiment of the present application;

[0029] Fig.11 is a schematic diagram of the frequency domain position of a PSSCH DMRS provided by an embodiment of the present application;

[0030] Fig.12 is a flow chart of a side communication method provided by an embodiment of the present application;

[0031] Fig.13 is a schematic diagram of a side communication method provided by an embodiment of the present application;

[0032] Fig.14 is a schematic diagram of a side communication method provided by another embodiment of the present application;

[0033] Fig.15 is a schematic diagram of a side communication method provided by another embodiment of the present application;

[0034] Fig.16 is a schematic diagram of a first resource pool and a second resource pool provided by an embodiment of the present application;

[0035] Fig.17 It is a schematic diagram of the time-frequency resource location of a resource pool provided by an embodiment of the present application;

[0036] Fig.18 is a schematic diagram of a resource mapping relationship provided by an embodiment of the present application;

[0037] Fig.19 is a schematic diagram of resource selection provided by an embodiment of the present application;

[0038] Fig. 20 It is a schematic diagram of the time-frequency resource location of a resource subset provided by an embodiment of the present application;

[0039] Fig.21 is a schematic diagram of a first resource subset and a second resource subset provided by an embodiment of the present application;

[0040] Fig. 22is a schematic diagram of a resource mapping relationship provided by another embodiment of the present application;

[0041] Fig.23 is a schematic diagram of a resource mapping relationship provided by another embodiment of the present application;

[0042] Fig.24 is a block diagram of a side communication device provided by an embodiment of the present application;

[0043] Fig.25 is a block diagram of a side communication device provided by another embodiment of the present application;

[0044] Fig.26 is a block diagram of a side communication device provided by another embodiment of the present application;

[0045] Fig. 27 It is a structural diagram of a terminal device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0047] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0048] Please refer to Figure 1 , which shows a schematic diagram of a network architecture provided by an embodiment of the present application. The network architecture may include: a core network 11, an access network 12 and a terminal device 13.

[0049] The core network 11 includes several core network devices. The functions of the core network devices are mainly to provide user connection, user management, and service bearing, and to provide an interface to the external network as a bearer network. For example, the core network of the 5G (5th Generation) NR (New Radio) system may include devices such as AMF (Access and Mobility Management Function) entity, UPF (User Plane Function) entity, and SMF (Session Management Function) entity.

[0050] The access network 12 includes several access network devices 14. The access network in the 5G NR system can be called NG-RAN (New Generation-Radio Access Network). The access network device 14 is a device deployed in the access network 12 to provide wireless communication functions for the terminal device 13. The access network device 14 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in the 5G NR system, it is called gNodeB or gNB. With the evolution of communication technology, the name "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 13 are collectively referred to as access network devices. In addition, in the embodiments of the present application, the network devices mentioned refer to access network devices, such as base stations, unless otherwise specified.

[0051] The number of terminal devices 13 is usually multiple, and one or more terminal devices 13 can be distributed in each cell managed by an access network device 14. The terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile stations (Mobile Station, MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The access network device 14 communicates with the core network device through some air technology, such as the NG interface in the 5G NR system. The access network device 14 communicates with the terminal device 13 through some air technology, such as the Uu interface. In addition, in the embodiments of the present application, terminal devices and UE are usually used interchangeably, but they express the same meaning.

[0052] Terminal devices 13 and terminal devices 13 (for example, vehicle-mounted devices and other devices (such as other vehicle-mounted devices, mobile phones, RSU (Road Side Unit), etc.)) can communicate with each other through a direct communication interface (such as a PC5 interface). Accordingly, the communication link established based on the direct communication interface can be called a direct link or SL. SL transmission is the direct communication data transmission between terminal devices through a side link. Different from the traditional cellular system in which communication data is received or sent through access network equipment, SL transmission has the characteristics of short delay and low overhead, and is suitable for communication between two terminal devices with close geographical locations (such as vehicle-mounted devices and other peripheral devices with close geographical locations). It should be noted that in Figure 1In this application, only the vehicle-to-vehicle communication in the V2X (vehicle to everything) scenario is used as an example. SL technology can be applied to scenarios where various terminal devices communicate directly with each other. In other words, the terminal device in this application refers to any device that communicates using SL technology.

[0053] The "5G NR system" in the embodiment of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art may understand its meaning. The technical solution described in the embodiment of the present application may be applicable to a 5G NR system or to a subsequent evolution system of the 5G NR system.

[0054] Before introducing the technical solution of this application, some background technical knowledge involved in this application is first introduced and explained. The following related technologies can be combined arbitrarily with the technical solution of the embodiment of this application as optional solutions, and they all belong to the protection scope of the embodiment of this application. The embodiment of this application includes at least part of the following contents.

[0055] 1. Sideline communication in different network coverage environments

[0056] In sideline communication, according to the network coverage of the communicating terminal devices, it can be divided into sideline communication within network coverage, sideline communication with partial network coverage, and sideline communication outside network coverage.

[0057] In the sideline communication within the network coverage, all the terminal devices performing the sideline communication are within the coverage of the same access network device (base station), so that the above terminal devices can perform the sideline communication based on the same sideline configuration by receiving the configuration signaling of the access network device (base station). Figure 2 As shown, UE1 and UE2 are both within the coverage of base station 1.

[0058] In the case of partial network coverage for sideline communications, some terminal devices performing sideline communications are located within the coverage of the access network device (base station). These terminal devices can receive the configuration signaling of the access network device (base station) and perform sideline communications according to the configuration of the access network device (base station). However, terminal devices outside the network coverage cannot receive the configuration signaling of the access network device (base station). In this case, the terminal devices outside the network coverage will determine the sideline configuration based on the pre-configuration information and the information carried in the sideline broadcast channel PSBCH sent by the terminal devices within the network coverage, and perform sideline communications. For example, Figure 3 As shown, UE1 is located within the network coverage of base station 1, and UE2 is located outside the network coverage of base station 1.

[0059] For sideline communication outside the network coverage, all terminal devices performing sideline communication are located outside the network coverage, and all terminal devices determine the sideline configuration according to the pre-configuration information to perform sideline communication. Figure 4 As shown, UE1 and UE2 are both located outside the network coverage of base station 1.

[0060] 2. D2D / V2X

[0061] Device-to-device communication is a sidelink transmission technology based on D2D. It is different from the traditional cellular system where communication data is received or sent by base stations, so it has higher spectrum efficiency and lower transmission latency. The Internet of Vehicles system uses direct communication between terminal devices. 3GPP (3rd Generation Partnership Project) defines two transmission modes: mode 1 and mode 2.

[0062] The first mode: The transmission resources of the terminal device are allocated by the base station, and the terminal device 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 2 As shown, the terminal devices are all located within the network coverage area, and the base station allocates transmission resources for side transmission to the terminal devices.

[0063] The second mode: The terminal device selects a resource in the resource pool to transmit data. Figure 4 As shown, the terminal devices are all located outside the cell coverage, and the terminal devices autonomously select transmission resources from the pre-configured resource pool for side transmission; or, as shown Figure 2 As shown, the terminal device autonomously selects transmission resources from the resource pool configured by the base station for side transmission.

[0064] The second mode resource selection is performed in the following two steps:

[0065] Step 1: The terminal device takes all available resources in the resource selection window as resource set A.

[0066] If the terminal device sends data in some time slots in the listening window and does not listen, 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 "resourcereservation period" field in the resource pool configuration used.

[0067] If the terminal detects PSCCH (Physical Sidelink Control Channel) within the listening window, measure the RSRP (Reference Signal Received Power) of the PSCCH or the RSRP of the PSSCH (Physical Sidelink Shared Channel) scheduled by the PSCCH. If the measured RSRP is greater than the SL-RSRP (Sidelink Reference Signal Received Power) threshold, and the reserved resources are determined to be within the resource selection window based on the resource reservation information in the sidelink control information transmitted in the PSCCH, then exclude the corresponding resources from set A. If the remaining resources in resource set A are less than X% of all resources before resource exclusion in resource set A, raise the SL-RSRP threshold by 3dB and re-execute step 1. The possible values ​​of X are {20, 35, 50}, and the terminal device determines parameter X from the value set according to the priority of the data to be sent. Meanwhile, the SL-RSRP threshold is related to the priority carried in the PSCCH detected by the terminal device and the priority of the data to be sent by the terminal device. The terminal device uses the remaining resources in set A after resource exclusion as the candidate resource set.

[0068] Step 2: The terminal device randomly selects several resources from the candidate resource set as the transmission resources for its initial transmission and retransmission.

[0069] 3.NR-V2X

[0070] In NR-V2X, autonomous driving needs to be 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.

[0071] 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 device, such as Figure 5 As shown, unicast transmission is performed between UE1 and UE2. For multicast transmission, the receiving terminal devices are all terminal devices in a communication group, or all terminal devices within a certain transmission distance, such as Figure 6 As shown in the figure, UE1, UE2, UE3 and UE4 form a communication group, in which UE1 sends data, and the other terminal devices in the group (UE2, UE3 and UE4) are all receiving terminal devices. For the broadcast transmission mode, the receiving terminal device is any terminal device around the sending terminal device, such as Figure 7 As shown, UE1 is a transmitting terminal device, and other terminal devices around it, UE2, UE3, UE4, UE5 and UE6 are all receiving terminal devices.

[0072] 4.Time slot structure in NR-V2X

[0073] In NR-V2X, PSSCH and its associated PSCCH are transmitted in the same time slot, and PSCCH occupies 2 or 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 symbols used for sidelink transmission in a time slot are configured by the parameters sl-startSLsymbols and sl-lengthSLsymbols. The last symbol in this part of symbols is used as the GP (Guard period). PSSCH and PSCCH can only use the remaining time domain symbols, but if PSFCH (Physical Sidelink Feedback Channel) 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 AGC (Automatic Gain Control) and GP symbols before the symbol.

[0074] like Figure 8 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, and symbols 10 and 13 are used as GPs respectively. The time domain symbols that can be used for PSSCH transmission are symbols 3 to 9, and PSCCH occupies 3 time domain symbols, namely symbols 3, 4, and 5, and symbol 3 is usually used as an AGC symbol.

[0075] In NR-V2X, in addition to PSCCH and PSSCH, there may also be PSFCH in a side slot. Fig. 9As shown, in a time slot, the first OFDM (Orthogonal Frequency Division Multiplexing) symbol is fixed for AGC. On the AGC symbol, the UE (User Equipment) 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 PRBs (Physical Resource Blocks) 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.

[0076] The DMRS (Demodulation Reference Signal) 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.10 The time domain positions of 4 DMRS symbols when the number of PSSCH symbols is 13 are shown.

[0077] Table 1: Number and position of DMRS symbols for different PSSCH and PSCCH symbol numbers

[0078]

[0079] If multiple time-domain DMRS patterns are configured in the resource pool, the specific time-domain DMRS pattern used is selected by the transmitting UE and indicated in the first-order SCI (Sidelink Control Information). 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.

[0080] 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, P i The i-th CRC (Cyclic Redundancy Check) of the PSCCH that schedules the PSSCH, L=24, is the number of bits of the PSCCH CRC.

[0081] NR PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel) 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, single symbol DMRS frequency domain type 2 can support 6 DMRS ports, and in the case of double DMRS symbols, the number of ports supported by both types is doubled. However, in NR-V2X, such as Fig.11 As shown, since PSSCH only needs to support two DMRS ports at most, only single-symbol DMRS frequency domain type 1 is supported.

[0082] 5. Positioning based on sidelink

[0083] In 3GPP R-17, 3GPP 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, and the results of the study were recorded in TR38.845. In addition, SA1 developed requirements for "Ranging-based services" in TS22.261 and positioning accuracy requirements for IIoT use cases in out-of-coverage scenarios in TS22.104. 3GPP needs to study and develop sidelink positioning solutions to support the use cases, scenarios and requirements identified in these activities. In order to improve positioning accuracy, especially to achieve positioning of terminals located outside the coverage of cellular networks, 3GPP introduced positioning based on sidelink positioning reference signals in Rel-18. According to the current conclusions, the sideline positioning reference signal SL PRS can be sent in a dedicated resource pool. However, in order to support sideline positioning and sideline communication, the terminal device also needs to send and receive terminal mutual discovery information, configuration information, measurement reporting information related to sideline positioning, as well as control and data information related to sideline communication, etc., and this information needs to be carried through sideline channels such as PSCCH and / or PSSCH.

[0084] Based on the above content, the present application proposes a sidewalk communication method, which supports sidewalk positioning and sidewalk communication by sending a first message for indicating the sending method of SL PRS.

[0085] Please refer to Fig.12 , which shows a flow chart of a sideline communication method provided by an embodiment of the present application. The method is executed by a first terminal device. The method may include the following step 1210.

[0086] Step 1210: The first terminal device sends first information to the second terminal device, where the first information is used to indicate a sending method of the sidelink SL PRS.

[0087] Correspondingly, the second terminal device receives the first information sent by the first terminal device.

[0088] In some embodiments, the sending method of SL PRS includes at least one of the following: time domain resource position of SL PRS; frequency domain resource position of SL PRS; repetition period of SL PRS; identification information of the sending terminal of SL PRS; identification information of the receiving terminal of SL PRS; sequence information of SL PRS.

[0089] The time domain resource position of the SL PRS refers to the position of the time domain resources occupied by the SL PRS in the resource pool.

[0090] The frequency domain resource position of the SL PRS refers to the position of the frequency domain resources occupied by the SL PRS in the resource pool.

[0091] The repetition period of the SL PRS refers to the time interval for repeated transmission of the SL PRS.

[0092] The identification information of the sending terminal of the SL PRS refers to the identification information of the terminal device sending the SL PRS indicated by the above-mentioned first information, for example, the ID (Identifier) ​​of the terminal device sending the SL PRS.

[0093] The identification information of the receiving terminal of the SL PRS refers to the identification information of the terminal device that receives the SL PRS indicated by the above-mentioned first information, for example, the ID of the terminal device that receives the SL PRS.

[0094] The sequence information of the SL PRS refers to information on the sequence of symbols constituting the SL PRS.

[0095] In some embodiments, the first information can be used to indicate the position of the time domain resources occupied by the SL PRS in the resource pool, and can also be used to indicate the relationship between the position of the time domain resources occupied by the SL PRS in the resource pool and the reference time domain resource position. The reference time domain resource position can be configured or pre-configured by the network, and this application does not limit this.

[0096] Exemplarily, the first information may be used to indicate the time slot position occupied by the SL PRS in the resource pool, and may also be used to indicate the relationship between the time slot position occupied by the SL PRS in the resource pool and the reference time slot position.

[0097] In some embodiments, the first terminal device sends the first information to the second terminal device in a unicast manner. Fig.13 As shown, UE1 unicasts the first information to UE2.

[0098] In some embodiments, the first terminal device is a sending terminal device, and the second terminal device is a receiving terminal device. Fig.13 As shown, UE1 sends first information to UE2, and the first information is used to indicate the sending method of SL PRS sent by UE1 to UE2.

[0099] In some embodiments, the first terminal device is not a sender terminal device, and the second terminal device is a receiver terminal device. Fig.13 As shown, UE1 sends first information to UE2, and the first information is used to indicate the sending method of SL PRS sent by UE3 to UE2.

[0100] In some embodiments, the first terminal device is not a sender terminal device, and the second terminal device is not a receiver terminal device. Fig.13 As shown, UE1 sends first information to UE2, and the first information is used to indicate the sending method of SL PRS sent by UE3 to UE4.

[0101] In some embodiments, the first terminal device sends the first information to the second terminal device in a multicast manner, and the second terminal device is a terminal device in the multicast group. Fig.14 As shown, UE2, UE3 and UE4 serve as a multicast group, and UE1 multicasts the first information to the multicast group where UE2, UE3 and UE4 are located.

[0102] In some embodiments, the first terminal device is a sender terminal device, and the second terminal device is located in a multicast group. Fig.14 As shown, UE2, UE3 and UE4 are used as a multicast group, and UE1 multicasts the first information to the multicast group where UE2, UE3 and UE4 are located, and the first information is used to instruct UE1 to send SL PRS to UE2.

[0103] In some embodiments, the first terminal device is a sender terminal device, and the second terminal device is not located in the multicast group. Fig.14 As shown, UE2, UE3 and UE4 are used as a multicast group. UE1 multicasts the first information to the multicast group where UE2, UE3 and UE4 are located. The first information is used to instruct UE1 to send SL PRS to UE5.

[0104] In some embodiments, the first terminal device is not a sender terminal device, and the second terminal device is located in a multicast group. Fig.14 As shown, UE2, UE3 and UE4 are used as a multicast group. UE1 multicasts the first information to the multicast group where UE2, UE3 and UE4 are located. The first information is used to instruct UE5 to send SL PRS to UE3.

[0105] In some embodiments, the first terminal device is not a sender terminal device, and the second terminal device is not located in the multicast group. Fig.14 As shown, UE2, UE3 and UE4 are used as a multicast group. UE1 multicasts the first information to the multicast group where UE2, UE3 and UE4 are located. The first information is used to instruct UE5 to send SL PRS to UE6.

[0106] In some embodiments, the first terminal sends the first information to the second terminal device in a broadcasting manner, and the second terminal device is any terminal device that meets the broadcasting condition. The broadcasting condition includes that the second terminal device is within a range threshold of the first terminal device. For example, Fig.15 As shown, UE1 broadcasts the first information to UE2, UE3, UE4 and UE5.

[0107] In some embodiments, the first terminal device is a sending terminal device, and the second terminal device meets the broadcast condition. Fig.15 As shown, UE1 broadcasts first information to UE2, UE3, UE4 and UE5, and the first information is used to indicate the sending method of UE1 to send SL PRS to UE2.

[0108] In some embodiments, the first terminal device is a sending terminal device, and the second terminal device does not meet the broadcast condition. Fig.15 As shown, UE1 broadcasts first information to UE2, UE3, UE4 and UE5, and the first information is used to indicate the sending method of UE1 to send SL PRS to UE6.

[0109] In some embodiments, the first terminal device is not a sender terminal device, and the second terminal device meets the broadcast condition. Fig.15 As shown, UE1 broadcasts first information to UE2, UE3, UE4 and UE5, and the first information is used to indicate the sending method of UE2 to send SL PRS to UE3.

[0110] In some embodiments, the first terminal device is not a sending terminal device, and the second terminal device does not meet the broadcast condition. Fig.15 As shown, UE1 broadcasts first information to UE2, UE3, UE4 and UE5, and the first information is used to instruct UE2 to send SL PRS to UE6.

[0111] The technical solution provided in the embodiment of the present application sends first information for indicating the sending method of SL PRS to the second terminal device through the first terminal device, instructing the second terminal to receive SL PRS, thereby improving the resource utilization efficiency on the sidecarrier and the performance of the sidecar positioning and sidecar communication system.

[0112] In some embodiments, the resource pool used for sending the first information is a first resource pool, the resource pool used for sending the SL PRS is a second resource pool, and the first resource pool and the second resource pool are different resource pools.

[0113] For example, Fig.16As shown, resource pool 1 is the first resource pool, resource pool 2 is the second resource pool, and the first information sent in resource pool 1 is used to indicate the sending method of the SL PRS sent in resource pool 2.

[0114] In some embodiments, the first resource pool and the second resource pool occupy different time domain resources; and / or the first resource pool and the second resource pool occupy different frequency domain resources.

[0115] Exemplarily, the first resource pool and the second resource pool occupy different time domain resources, such as Fig.17 As shown, resource pool 1 and resource pool 2 occupy different time domain resources, but occupy the same frequency domain resources.

[0116] Exemplarily, the first resource pool and the second resource pool occupy different frequency domain resources, such as Fig.17 As shown, resource pool 1 and resource pool 3 occupy different frequency domain resources, but occupy the same time domain resources.

[0117] Exemplarily, the first resource pool and the second resource pool occupy different time domain resources and different frequency domain resources, such as Fig.17 As shown, resource pool 2 and resource pool 3 occupy different time domain resources and different frequency domain resources.

[0118] In some embodiments, there is a mapping relationship between the resources in the first resource pool and the first resource in the second resource pool.

[0119] Exemplarily, there is a corresponding relationship between the resource for sending the first information in the first resource pool and the resource for sending the first SL PRS in the second resource pool. Fig.18 As shown, resource pool 1 is the first resource pool, resource pool 2 is the second resource pool, and when the first information is sent on resource 10 of resource pool 1, the resource occupied by the first SL PRS in resource pool 2 is resource 20; when the first information is sent on resource 11 of resource pool 1, the resource occupied by the first SL PRS in resource pool 2 is resource 21.

[0120] In some embodiments, a constraint condition is satisfied between the first time unit and the second time unit, the first time unit is a time unit where resources for sending the first information are located, and the second time unit is a time unit where the first resource for sending the SL PRS is located.

[0121] In some embodiments, the constraint condition includes: the interval duration between the first time unit and the second time unit is greater than or equal to a minimum threshold value, and / or less than or equal to a maximum threshold value.

[0122] Exemplarily, the interval duration between the first time slot and the second time slot is greater than or equal to a minimum threshold value, and / or less than or equal to a maximum threshold value.

[0123] In some embodiments, the minimum threshold value can be defined by a standard or configured or pre-configured by the network, and the present application does not limit this. The setting of the minimum threshold value is used to provide the receiving terminal device of the SL PRS with time to decode the above first information.

[0124] In some embodiments, the maximum threshold value is related to the priority of the SL PRS.

[0125] Exemplarily, the higher the priority of the SL PRS, the larger its maximum threshold value, so that the terminal device allowed to send a high-priority SL PRS can send the first information corresponding to the SL PRS earlier, enabling the receiving terminal device to perform resource reservation earlier.

[0126] In some embodiments, the first information is further used to indicate the index of the second resource pool.

[0127] Exemplarily, there are multiple second resource pools, and the first information is further used to indicate the index of the second resource pool where the resources occupied by the SL PRS are located. For example, as Fig.17 shown, resource pool 1 is the first resource pool, and resource pools 2 and 3 are the second resource pools. If the resource pool where the resources occupied by the SL PRS are located is resource pool 2, the first information is further used to indicate the index of resource pool 2; if the resource pool where the resources occupied by the SL PRS are located is resource pool 3, the first information is further used to indicate the index of resource pool 3.

[0128] In some embodiments, the first information is carried by at least one of the following information: MAC CE (Media Access Control Control Element), 2nd-stage-SCI (Second-stage Sidelink Control Information).

[0129] In some embodiments, the first information is carried and sent on at least one of the following channels: PSCCH, PSSCH.

[0130] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource pool: the first information item, which is used to indicate the PRB occupied by the SL PRS; the second information item, which is used to indicate the repetition period of the SL PRS; the third information item, which is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; the fourth information item, which is used to indicate the RE (Resource Element) occupied by the SL PRS.

[0131] Exemplarily, the first information is carried in MAC CE information, and the information item included in the first information is a field.

[0132] The first information item is the RSL (Reference Slot Location) field, which is used to indicate the PRB occupied by the SL PRS, for example, to indicate the reference time domain resource location. The length of this field can be 17 bits or (10+[log 2 (10·2μ)]) bits, where μ is the frequency domain resource granularity occupied by SL PRS, that is, the subcarrier spacing index of the carrier occupied by SL PRS, and the value range is 0, 1, 2, and 3, corresponding to 15KHz, 30KHz, 60KHz and 120KHz respectively. 10 bits in the RSL field are used to indicate the SFN (System Frame Number) index, and the remaining bits are used to indicate the time slot index within the SFN.

[0133] In some embodiments, the reference time domain resource position is the position of the time slot where the first resource of the first resource combination is located.

[0134] The second information item is RC i Field, which indicates the repetition period of SL PRS. Exemplarily, this field is used to indicate a resource combination, each resource combination indicates at most 3 time slots for SL PRS and frequency domain resources for SL PRS in two time slots, which may include the repetition period of SL PRS.

[0135] The third information item is SYM i，j A field is used to indicate the OFDM symbol occupied by the SL PRS. Exemplarily, this field is used to indicate the OFDM symbol used for the SL PRS in the jth time slot indicated by the i-th resource combination.

[0136] The fourth information item is RE i,j A field is used to indicate the REs occupied by the SL PRS. Exemplarily, this field is used to indicate the REs used for the SL PRS in the jth time slot indicated by the i-th resource combination.

[0137] In some embodiments, the MAC CE information also includes at least one of the following fields.

[0138] First resource location i-1 Field, which is used to indicate the interval of the time slot where the first resource of the i-th resource combination is located relative to the reference time slot; First resource location 0The Firstresource location field is used to indicate the position of the time slot where the first resource of the second resource combination is located relative to the reference time slot, and so on. Since the reference time domain resource location indicated in the RSL field can be used as the position of the time slot where the first resource of the first resource combination is located, the Firstresource location field is used to indicate the position of the time slot where the first resource of the first resource combination is located relative to the reference time slot. i-1 The field no longer needs to indicate the position of the time slot where the first resource of the first resource combination is located.

[0139] The DstID field is used to indicate the identification information of the receiving terminal device of the SL PRS.

[0140] The SrID field is used to indicate the identification information of the sending terminal device of the SL PRS.

[0141] The SqID field is used to indicate the sequence information of the SL PRS, where the sequence information of the SL PRS includes at least the identification information of the SL PRS sequence.

[0142] In some embodiments, the first information is carried in 2nd-stage-SCI information, and the information item included in the first information is a bit field.

[0143] In some embodiments, the first information is carried by the format 2-C of the 2nd-stage-SCI. The Source ID bit field and the Destination ID bit field in 2-C can be used to indicate the identification information of the SL PRS sender terminal device and the identification information of the receiver terminal device, respectively. The SL PRS Resource combinations bit field, the First resource location bit field, the Reference slot location bit field and the Lowest subChannel indices bit field can be used to indicate the time domain resource location, frequency domain resource location and repetition period occupied by the SL PRS. And one or more bit fields in the HARQ process number bit field, the New data indicator bit field, the Redundancy version bit field, the HARQ feedback enabled / disabled indicator bit field and the CSI request bit field in 2-C can be used to indicate other SL PRS transmission mode information, for example, the OFDM symbols occupied by the SL PRS, the RE occupied by the SLPRS and other information. The channel used for scheduling the SCI format 2-C should indicate through a specific bit that the SCI format 2-C carries the first information. For example, it is indicated by a specific bit in the Reserved bit field.

[0144] In some embodiments, the first information may be carried by a newly defined second-stage SCI format different from SCI formats 2-A, 2-B, and 2-C, and the 2nd-stage SCI format field in the channel that schedules the newly defined second-stage SCI format shall be set to "11", and the newly defined second-stage SCI format shall include at least one or more of the following bit fields:

[0145] A bit field used to indicate the identification information of the SL PRS sending terminal device; a bit field used to indicate the identification information of the receiving terminal device; a bit field used to indicate the time domain resource position occupied by the SL PRS; a bit field used to indicate the frequency domain resource position occupied by the SL PRS; a bit field used to indicate the repetition period of the SL PRS; a bit field used to indicate the OFDM symbol occupied by the SL PRS; a bit field used to indicate the RE occupied by the SL PRS.

[0146] In some embodiments, the first information is carried in MAC CE information and 2nd-stage-SCI information.

[0147] In some embodiments, the first information carried in the MAC CE information and the 2nd-stage-SCI information is the same information. Exemplarily, the first information carried in the MAC CE includes the time domain resource position of the SL PRS; the frequency domain resource position of the SL PRS; the repetition period of the SL PRS; the identification information of the sending terminal of the SL PRS; the identification information of the receiving terminal of the SL PRS; and the sequence information of the SL PRS. The first information carried in the 2nd-stage-SCI information also includes the time domain resource position of the SL PRS; the frequency domain resource position of the SL PRS; the repetition period of the SL PRS; the identification information of the sending terminal of the SL PRS; the identification information of the receiving terminal of the SL PRS; and the sequence information of the SL PRS.

[0148] In some embodiments, the first information carried in the MAC CE information and the 2nd-stage-SCI information is different information. Exemplarily, the first information carried in the MAC CE includes the time domain resource location of the SL PRS; the frequency domain resource location of the SL PRS; and the repetition period of the SL PRS. The first information carried in the 2nd-stage-SCI information includes the identification information of the sending terminal of the SL PRS; the identification information of the receiving terminal of the SL PRS; and the sequence information of the SL PRS.

[0149] It should be noted that if there is a mapping relationship between the resources in the first resource pool and the first resource in the second resource pool, the first information may not indicate the time domain resource position occupied by the first SL PRS.

[0150] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource pool and the frequency domain resource granularity occupied by the SLPRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SLPRS allowed in the second resource pool; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource pool and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain RE interval of the SL PRS allowed in the second resource pool.

[0151] In some embodiments, the first terminal device detects information sent by other terminal devices in the first resource pool to indicate the sending of SL PRS, and uses the resources in the resource selection window in the second resource pool as a candidate resource set; based on the information sent by other terminal devices to indicate the sending of SL PRS, the resources in the candidate resource set are excluded to obtain the remaining resources in the candidate resource set; and the sending resources of SL PRS are selected from the remaining resources.

[0152] For example, Fig.19 As shown, resource pool 1 is the first resource pool, and resource pool 2 and resource pool 3 are the second resource pool. The first terminal device detects the information (information 1 and information 2) sent by other terminal devices in resource pool 1 to indicate the sending of SL PRS, and uses the resources in resource pool 2 and resource pool 3 that are located in the resource selection window as candidate resource set 1910; according to information 1 and information 2, the resources in candidate resource set 1910 are excluded to obtain the remaining resources in the candidate resource set; and the sending resources of SL PRS are selected from the remaining resources. For example, the resource occupied by SL PRS of information 1 is resource 1, and the resource occupied by SLPRS of information 2 is resource 2, then resource 1 and resource 2 are excluded to obtain the remaining resources in the candidate resource set; and the sending resources of SL PRS are selected from the remaining resources.

[0153] In some embodiments, the resources in the candidate resource set can be excluded according to the priority of the SL PRS and the information sent by other terminal devices to indicate the sending of the SLPRS, so as to obtain the remaining resources in the candidate resource set; and the sending resources of the SL PRS can be selected from the remaining resources.

[0154] Exemplarily, the SL-RSRP threshold is determined according to the priority of the SL PRS, and resources whose RSRP of the SL PRS is higher than the SL-RSRP threshold among the occupied resources are excluded.

[0155] The resources in the second resource pool are excluded to avoid conflicts in resource selection and improve the reliability of side communication.

[0156] The technical solution provided in the embodiment of the present application provides a method for sending the first information and SL PRS in different resource pools. The first resource pool is used to send the first information, and the second resource pool is used to send the SL PRS. The first information is carried by MAC CE information and / or 2nd-stage-SCI information to ensure the sending of SL PRS and the corresponding first information, thereby improving the reliability of side communication.

[0157] In some embodiments, the resource pool used for sending the first information is the same resource pool as the resource pool used for sending the SL PRS.

[0158] In some embodiments, the resource pool includes a first resource subset and a second resource subset, the first resource subset is a resource subset used for sending first information, and the second resource subset is a resource subset used for sending SL PRS; wherein the first resource subset and the second resource subset occupy different time domain resources in the resource pool, and / or the first resource subset and the second resource subset occupy different frequency domain resources in the resource pool.

[0159] Exemplarily, the first resource subset and the second resource subset occupy different time domain resources in the resource pool. Exemplarily, Fig. 20 As shown, the first resource subset is subset 1, the second resource subset is subset 2, and subset 1 and subset 2 occupy different time domain resources in the resource pool.

[0160] Exemplarily, the first resource subset and the second resource subset occupy different frequency domain resources in the resource pool. Exemplarily, Fig. 20 As shown, the first resource subset is subset 3, the second resource subset is subset 2, and subset 3 and subset 2 occupy different frequency domain resources in the resource pool.

[0161] Exemplarily, the first resource subset and the second resource subset occupy different time domain resources and different frequency domain resources in the resource pool. Exemplarily, Fig. 20 As shown, the first resource subset is subset 4, the second resource subset is subset 2, and subset 4 and subset 2 occupy different time domain resources and different frequency domain resources in the resource pool.

[0162] In some embodiments, the first information sent using any resource in the first resource subset includes an information item indicating the time-frequency resources occupied by the SL PRS in the second resource subset.

[0163] That is, there is no mapping relationship between any resource in the first resource subset and the resource in the second resource subset. When the first information is sent using any resource in the first resource subset, the first information includes an information item for indicating the time-frequency resources occupied by the SL PRS in the second resource subset.

[0164] For example, Fig.21 As shown, the first resource subset is subset 1, the second resource subset is subset 2, and the first information sent in subset 1 is used to indicate the sending method of the SL PRS sent in subset 2.

[0165] In some embodiments, for a first time unit belonging to a first resource subset, the first time unit includes N subchannels, and the N subchannels correspond one-to-one to N SL PRS resources within a first time domain range belonging to a second resource subset; wherein, the first information sent in the i-th subchannel among the N subchannels is used to reserve the i-th SL PRS resource among the N SL PRS resources, N is an integer greater than 1, and i is a positive integer less than or equal to N.

[0166] For example, Fig. 22 As shown, the first resource subset is subset 1, and the second resource subset is subset 2. Subset 1 includes a first time unit 2210 and a second time unit 2220, and the first time unit 2210 includes four subchannels: channel 1, channel 2, channel 3, and channel 4. Subset 2 includes a first time domain range 2230 and a second time domain range 2240, and the first time domain range 2230 includes four resources: resource 1, resource 2, resource 3, and resource 4. The four subchannels of the first time unit 2210 correspond one-to-one to the four resources of the first time domain range 2230. Channel 1 is used to send the first information for reserving resource 1; channel 2 is used to send the first information for reserving resource 2; channel 3 is used to send the first information for reserving resource 3; channel 4 is used to send the first information for reserving resource 4.

[0167] There is a mapping relationship between the resources in the first resource subset and the resources in the second resource subset. There is no need to indicate the time-frequency resources occupied by SLPRS, nor is there a need to exclude resources in the second resource subset. While ensuring the reliability of side communications, the workload of the first terminal device sending the first information is reduced.

[0168] In some embodiments, the complete frequency domain resources corresponding to the first time unit include a first part of frequency domain resources and a second part of frequency domain resources; the first part of frequency domain resources includes N subchannels; the second part of frequency domain resources is used to send other side positioning related information except the first information.

[0169] For example, Fig.23As shown, the first resource subset is subset 1, and the second resource subset is subset 2. Subset 1 includes a first time unit 2310 and a second time unit 2320. The complete frequency domain resources corresponding to the first time unit 2310 include a first part of frequency domain resources 2311 and a second part of frequency domain resources 2312; the first part of frequency domain resources 2311 includes four sub-channels of channel 1, channel 2, channel 3 and channel 4. Subset 2 includes a first time domain range 2330 and a second time domain range 2340. The first time domain range 2330 includes four resources of resource 1, resource 2, resource 3 and resource 4. The four sub-channels of the first time unit 2310 correspond one-to-one to the four resources of the first time domain range 2330. Channel 1 is used to send the first information for reserving resource 1; channel 2 is used to send the first information for reserving resource 2; channel 3 is used to send the first information for reserving resource 3; channel 4 is used to send the first information for reserving resource 4.

[0170] The resources within the same time unit are further divided, with the first part of the frequency domain resources being used to send the first information, and the second part of the frequency domain resources being used to send other sideline positioning related information except the first information, thereby improving the utilization rate of the resources in the first resource subset.

[0171] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource subset: a first information item, the first information item is used to indicate the physical resource block PRB occupied by the SL PRS; a second information item, the second information item is used to indicate the repetition period of the SL PRS; a third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; and a fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

[0172] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource subset and the frequency domain resource granularity occupied by the SL PRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource subset; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource subset and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain interval of the SL PRS allowed in the second resource subset.

[0173] It should be noted that this embodiment and the above embodiment have the same concept. For details not described in detail in this embodiment, please refer to the above embodiment and will not be described in detail here.

[0174] The technical solution provided in the embodiment of the present application sends first information for indicating the sending method of SL PRS to the second terminal device through the first terminal device, instructing the second terminal to receive SL PRS, thereby improving the resource utilization efficiency on the sidecarrier and the performance of the sidecar positioning and sidecar communication system.

[0175] In addition, a method for sending the first information and the SL PRS in the same resource pool is provided, wherein the resource pool is divided into two subsets: a first resource subset for sending the first information and a second resource subset for sending the SL PRS, and there can be a one-to-one correspondence between the resources in the first resource subset for sending the first information and the resources in the second resource subset for sending the SL PRS. The first information does not need to indicate the time-frequency resources occupied by the SL PRS, nor does it need to exclude the resources in the second resource subset, thereby ensuring the reliability of the side communication while reducing the workload of the first terminal device sending the first information.

[0176] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0177] Please refer to Fig.24 , which shows a block diagram of a side communication device provided by an embodiment of the present application. The device has the function of implementing the above-mentioned side communication method example, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the first terminal device introduced above, or it can be set in the first terminal device. Fig.24 As shown, the device 2400 may include: a sending module 2410.

[0178] The sending module 2410 is used to send first information, where the first information is used to indicate a sending method of a sideline positioning reference signal SLPRS.

[0179] In some embodiments, the sending method of the SL PRS includes at least one of the following: the time domain resource position of the SL PRS; the frequency domain resource position of the SL PRS; the repetition period of the SL PRS; the identification information of the sending terminal of the SL PRS; the identification information of the receiving terminal of the SL PRS; and the sequence information of the SL PRS.

[0180] In some embodiments, the resource pool used for sending the first information is a first resource pool, the resource pool used for sending the SLPRS is a second resource pool, and the first resource pool and the second resource pool are different resource pools.

[0181] In some embodiments, the first resource pool and the second resource pool occupy different time domain resources; and / or, the first resource pool and the second resource pool occupy different frequency domain resources.

[0182] In some embodiments, there is a mapping relationship between the resources in the first resource pool and the first resource in the second resource pool; and / or, a constraint condition is satisfied between the first time unit and the second time unit, the first time unit is the time unit where the resources for sending the first information are located, and the second time unit is the time unit where the first resource for sending the SLPRS is located.

[0183] In some embodiments, the constraint condition includes: the interval duration between the first time unit and the second time unit is greater than or equal to a minimum threshold value, and / or less than or equal to a maximum threshold value.

[0184] In some embodiments, the maximum threshold is related to the priority of the SL PRS.

[0185] In some embodiments, the first information is further used to indicate an index of the second resource pool.

[0186] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource pool: a first information item, the first information item is used to indicate the physical resource block PRB occupied by the SL PRS; a second information item, the second information item is used to indicate the repetition period of the SL PRS; a third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; and a fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

[0187] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource pool and the frequency domain resource granularity occupied by the SL PRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource pool; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource pool and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain RE interval of the SL PRS allowed in the second resource pool.

[0188] In some embodiments, Fig.25 As shown, the device 2400 also includes a processing module 2420.

[0189] The processing module 2420 is used to detect the information sent by other terminal devices in the first resource pool to indicate the sending of SL PRS, and use the resources in the resource selection window in the second resource pool as a candidate resource set; according to the information sent by the other terminal devices to indicate the sending of SL PRS, exclude the resources in the candidate resource set to obtain the remaining resources in the candidate resource set; and select the sending resources of the SL PRS from the remaining resources.

[0190] In some embodiments, the resource pool used for sending the first information is the same resource pool as the resource pool used for sending the SL PRS.

[0191] In some embodiments, the resource pool includes a first resource subset and a second resource subset, the first resource subset is a resource subset used for sending the first information, and the second resource subset is a resource subset used for sending the SL PRS; wherein the first resource subset and the second resource subset occupy different time domain resources in the resource pool, and / or the first resource subset and the second resource subset occupy different frequency domain resources in the resource pool.

[0192] In some embodiments, the first information sent using any resource in the first resource subset includes an information item for indicating the time-frequency resources occupied by the SL PRS in the second resource subset.

[0193] In some embodiments, for a first time unit belonging to the first resource subset, the first time unit includes N subchannels, and the N subchannels correspond one-to-one to N SLPRS resources within a first time domain range belonging to the second resource subset; wherein, the first information sent in the i-th subchannel among the N subchannels is used to reserve the i-th SL PRS resource among the N SL PRS resources, N is an integer greater than 1, and i is a positive integer less than or equal to N.

[0194] In some embodiments, the complete frequency domain resources corresponding to the first time unit include a first part of frequency domain resources and a second part of frequency domain resources; the first part of frequency domain resources includes the N sub-channels; the second part of frequency domain resources is used to send other side positioning related information except the first information.

[0195] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource subset: a first information item, the first information item is used to indicate the physical resource block PRB occupied by the SL PRS; a second information item, the second information item is used to indicate the repetition period of the SL PRS; a third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; and a fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

[0196] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource subset and the frequency domain resource granularity occupied by the SL PRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource subset; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource subset and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain interval of the SL PRS allowed in the second resource subset.

[0197] In some embodiments, the first information is carried by at least one of the following information: media access layer control element MAC CE, second-stage sidelink control information 2nd-stage-SCI.

[0198] In some embodiments, the first information is sent by carrying at least one of the following channels: a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH.

[0199] The technical solution provided in the embodiment of the present application sends first information for indicating the sending method of SL PRS to the second terminal device through the first terminal device, instructing the second terminal to receive SL PRS, thereby improving the resource utilization efficiency on the sidecarrier and the performance of the sidecar positioning and sidecar communication system.

[0200] Please refer to Fig.26 , which shows a block diagram of a side communication device provided by an embodiment of the present application. The device has the function of implementing the above-mentioned side communication method example, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the second terminal device introduced above, or it can be set in the second terminal device. Fig.26 As shown, the device 2600 may include: a receiving module 2610.

[0201] The receiving module 2610 is used to receive first information, where the first information is used to indicate a sending method of a sideline positioning reference signal SLPRS.

[0202] In some embodiments, the sending method of the SL PRS includes at least one of the following: the time domain resource position of the SL PRS; the frequency domain resource position of the SL PRS; the repetition period of the SL PRS; the identification information of the sending terminal of the SL PRS; the identification information of the receiving terminal of the SL PRS; and the sequence information of the SL PRS.

[0203] In some embodiments, the resource pool used for sending the first information is a first resource pool, the resource pool used for sending the SLPRS is a second resource pool, and the first resource pool and the second resource pool are different resource pools.

[0204] In some embodiments, the first resource pool and the second resource pool occupy different time domain resources; and / or, the first resource pool and the second resource pool occupy different frequency domain resources.

[0205] In some embodiments, there is a mapping relationship between the resources in the first resource pool and the first resource in the second resource pool; and / or, a constraint condition is satisfied between the first time unit and the second time unit, the first time unit is the time unit where the resources for sending the first information are located, and the second time unit is the time unit where the first resource for sending the SLPRS is located.

[0206] In some embodiments, the constraint condition includes: the interval duration between the first time unit and the second time unit is greater than or equal to a minimum threshold value, and / or less than or equal to a maximum threshold value.

[0207] In some embodiments, the maximum threshold is related to the priority of the SL PRS.

[0208] In some embodiments, the first information is further used to indicate an index of the second resource pool.

[0209] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource pool: a first information item, the first information item is used to indicate the physical resource block PRB occupied by the SL PRS; a second information item, the second information item is used to indicate the repetition period of the SL PRS; a third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; and a fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

[0210] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource pool and the frequency domain resource granularity occupied by the SL PRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource pool; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource pool and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain interval of the SL PRS allowed in the second resource pool.

[0211] In some embodiments, the sending resources of the SL PRS are selected from the remaining resources obtained after excluding the resources in the candidate resource set, and the candidate resource set is initialized to the resources in the second resource pool that are within the resource selection window.

[0212] In some embodiments, the resource pool used for sending the first information is the same resource pool as the resource pool used for sending the SL PRS.

[0213] In some embodiments, the resource pool includes a first resource subset and a second resource subset, the first resource subset is a resource subset used for sending the first information, and the second resource subset is a resource subset used for sending the SL PRS; wherein the first resource subset and the second resource subset occupy different time domain resources in the resource pool, and / or the first resource subset and the second resource subset occupy different frequency domain resources in the resource pool.

[0214] In some embodiments, the first information sent using any resource in the first resource subset includes an information item for indicating the time-frequency resources occupied by the SL PRS in the second resource subset.

[0215] In some embodiments, for a first time unit belonging to the first resource subset, the first time unit includes N subchannels, and the N subchannels correspond one-to-one to N SLPRS resources within a first time domain range belonging to the second resource subset; wherein, the first information sent in the i-th subchannel among the N subchannels is used to reserve the i-th SL PRS resource among the N SL PRS resources, N is an integer greater than 1, and i is a positive integer less than or equal to N.

[0216] In some embodiments, the complete frequency domain resources corresponding to the first time unit include a first part of frequency domain resources and a second part of frequency domain resources; the first part of frequency domain resources includes the N sub-channels; the second part of frequency domain resources is used to send other side positioning related information except the SL PRS.

[0217] In some embodiments, the number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource subset: a first information item, the first information item is used to indicate the physical resource block PRB occupied by the SL PRS; a second information item, the second information item is used to indicate the repetition period of the SL PRS; a third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; and a fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

[0218] In some embodiments, the number of bits of the first information item is determined according to the number of PRBs included in the second resource subset and the frequency domain resource granularity occupied by the SL PRS; and / or, the number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource subset; and / or, the number of bits of the third information item is determined according to the number of OFDM symbols included in a time slot in the second resource subset and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, the number of bits of the fourth information item is determined according to the frequency domain interval of the SL PRS allowed in the second resource subset.

[0219] In some embodiments, the first information is carried by at least one of the following information: media access layer control element MAC CE, second-stage sidelink control information 2nd-stage-SCI.

[0220] In some embodiments, the first information is sent by carrying at least one of the following channels: a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH.

[0221] The technical solution provided in the embodiment of the present application sends first information for indicating the sending method of SL PRS to the second terminal device through the first terminal device, instructing the second terminal to receive SL PRS, thereby improving the resource utilization efficiency on the sidecarrier and the performance of the sidecar positioning and sidecar communication system.

[0222] Please refer to Fig. 27, which shows a schematic diagram of the structure of a terminal device provided by an embodiment of the present application. The terminal device 2700 may include: a processor 2701, a transceiver 2702 and a memory 2703. The processor 2701 is used to execute the functions of the above-mentioned processing module 2420, and the transceiver 2702 is used to implement the functions of the above-mentioned sending module 2410 and / or receiving module 2610.

[0223] The processor 2701 includes one or more processing cores, and the processor 2701 executes various functional applications and information processing by running software programs and modules. The processor 2701 is used to execute other steps except the sending and receiving steps executed by the terminal device in the above method embodiment.

[0224] The transceiver 2702 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, and the wireless communication component may include a wireless communication chip and a radio frequency antenna. The transceiver 2702 is used to perform the sending and / or receiving steps performed by the terminal device in the above method embodiment.

[0225] The memory 2703 may be connected to the processor 2701 and the transceiver 2702 .

[0226] The memory 2703 may be used to store a computer program executed by the processor, and the processor 2701 is used to execute the computer program to implement each step in the above method embodiment.

[0227] In an exemplary embodiment, when the terminal device is a first terminal device, the processor 2701 is used to send first information, where the first information is used to indicate a sending method of the SL PRS.

[0228] In another exemplary embodiment, when the terminal device is a second terminal device, the processor 2701 is used to receive first information, where the first information is used to indicate a sending method of a sideline positioning reference signal SL PRS.

[0229] For details not described in detail in this embodiment, please refer to the above embodiments, which will not be described in detail here.

[0230] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

[0231] The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned side communication method. Optionally, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disks, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0232] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions, and when the chip is running, it is used to implement the above-mentioned side communication method.

[0233] An embodiment of the present application also provides a computer program product, which includes computer instructions. The computer instructions are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned side communication method.

[0234] 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.

[0235] 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.

[0236] In some embodiments of the present application, "predefined" 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, predefined can refer to what is defined in the protocol.

[0237] In some 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, which is not limited in the present application.

[0238] The term "multiple" as used herein refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0239] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0240] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order to that shown in the figure. The embodiments of the present application are not limited to this.

[0241] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0242] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sideline communication method, It is characterized in that The method is performed by a first terminal device, and the method includes: The first information is sent, where the first information is used to indicate a sending method of a side positioning reference signal SL PRS.

2. The method according to claim 1, It is characterized in that The SL PRS is sent in at least one of the following ways: The time domain resource location of the SL PRS; The frequency domain resource location of the SL PRS; a repetition period of the SL PRS; Identification information of the sending terminal of the SL PRS; Identification information of the receiving terminal of the SL PRS; Sequence information of the SL PRS.

3. The method according to claim 1 or 2, It is characterized in that The resource pool used for sending the first information is the same resource pool as the resource pool used for sending the SL PRS.

4. The method according to claim 3, It is characterized in that The resource pool includes a first resource subset and a second resource subset, the first resource subset is a resource subset used for sending the first information, and the second resource subset is a resource subset used for sending the SL PRS; wherein the first resource subset and the second resource subset occupy different time domain resources in the resource pool, and / or the first resource subset and the second resource subset occupy different frequency domain resources in the resource pool.

5. The method according to claim 4, It is characterized in that The first information sent using any resource in the first resource subset includes an information item for indicating the time-frequency resources occupied by the SL PRS in the second resource subset.

6. The method according to claim 4, It is characterized in that For the first time unit belonging to the first resource subset, the first time unit includes N subchannels, and the N subchannels correspond one-to-one to the N SL PRS resources within the first time domain range belonging to the second resource subset; wherein, the first information sent in the i-th subchannel among the N subchannels is used to reserve the i-th SL PRS resource among the N SL PRS resources, N is an integer greater than 1, and i is a positive integer less than or equal to N.

7. The method according to any one of claims 4 to 6, It is characterized in that The number of bits of at least one of the following information items in the first information is determined according to the configuration of the second resource subset: A first information item, where the first information item is used to indicate a physical resource block PRB occupied by the SL PRS; a second information item, where the second information item is used to indicate a repetition period of the SL PRS; A third information item, the third information item is used to indicate the orthogonal frequency division multiplexing OFDM symbol occupied by the SL PRS; A fourth information item, the fourth information item is used to indicate the resource element RE occupied by the SL PRS.

8. The method according to claim 7, It is characterized in that The number of bits of the first information item is determined according to the number of PRBs included in the second resource subset and the frequency domain resource granularity occupied by the SL PRS; and / or, The number of bits of the second information item is determined according to the number of repetition periods of the SL PRS allowed in the second resource subset; and / or, The number of bits of the third information item is determined according to the number of OFDM symbols contained in a time slot in the second resource subset and the minimum number of OFDM symbols allowed to be occupied by the SL PRS; and / or, The number of bits of the fourth information item is determined according to the frequency domain interval of the SL PRS allowed in the second resource subset.

9. The method according to any one of claims 1 to 8, It is characterized in that The first information is carried and sent on at least one of the following channels: a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH.

10. A terminal device, It is characterized in that The terminal device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 9.

Images