Method for sending, method for receiving and device for direct link positioning reference signal

Abstract

The present application provides a sending method, a receiving method and an apparatus for a direct link positioning reference signal, wherein the sending method applied to the first terminal includes: obtaining the time-frequency resource configuration parameters of the SL PRS; determining the first resource, and sending the SL PRS or the SL PRS and the first indication information on the first resource according to the time-frequency resource configuration parameters, the first indication information being used to indicate the transmission parameter information on the first resource. In an embodiment of the present application, by obtaining the time-frequency resource configuration parameters of the SL PRS, and carrying the SL PRS on the first resource for sending and receiving according to the time-frequency resource configuration parameters, and cooperating with the first indication information, it is beneficial to realize the transmission of the SL PRS when there is no base station involved in the scheduling and the physical layer channel structure is different from the existing uplink and downlink, and it is convenient to locate the sidelink according to the SL PRS.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method for sending, a method for receiving, and a device for a direct link positioning reference signal. Background Art

[0002] 3GPP Release 16 carried out the research and standardization of NR Positioning. Within the coverage of the cellular network, the base station sends a cell-specific downlink positioning reference signal (PRS) signal, and the terminal sends an uplink sounding reference signal (SRS) for uplink positioning. Correspondingly, the reference signal time difference (RSTD) is measured, or the reference signal received power (RSRP) of the downlink positioning reference signal (DL PRS) is measured, or the time difference between the terminal receiving the DL PRS and sending the SRS is measured; the base station can measure the uplink relative time of arrival (RTOA), the RSRP of the SRS, the time difference between the 5G base station (gNB) receiving the SRS and the gNB sending the DL PRS, and the angle measurement value. By processing the measured values, the position of the user equipment (UE) is calculated.

[0003] Research and standardization work on sidelink Positioning is being actively carried out, but sidelink is different from downlink and uplink. Since there may not be a scenario of gNB scheduling, it is necessary to redesign the corresponding sidelink-PRS based on its own resource selection and physical layer structure characteristics to adapt to the sidelink Positioning technology. Release-16 / 17 sidelink does not introduce positioning-related features, and since the physical layer channel structure of sidelink is completely different from that of downlink and uplink, the existing DL PRS and SRS for positioning cannot be directly applied to sidelink. Summary of the invention

[0004] The technical purpose to be achieved by the embodiments of the present application is to provide a method for sending, a method for receiving and an apparatus for direct link positioning reference signals, so as to solve the current problem that positioning cannot be performed due to the lack of base station participation in scheduling and the physical layer channel structure being different from the known channel.

[0005] In order to solve the above technical problems, an embodiment of the present application provides a method for sending a direct link positioning reference signal SL PRS, which is applied to a first terminal and includes:

[0006] Obtaining time-frequency resource configuration parameters of a sidelink positioning reference signal (SLPRS);

[0007] Determine a first resource, and send an SL PRS or an SL PRS and first indication information on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate transmission parameter information on the first resource.

[0008] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, the first resource is determined in at least one of the following resource sets:

[0009] A first preset dedicated resource set;

[0010] Physical Sidelink Control Channel (PSCCH) resource set.

[0011] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0012] SL PRS time domain symbol number configuration information;

[0013] Time domain symbol position configuration information of SL PRS;

[0014] Frequency domain pattern configuration information of SL PRS;

[0015] Configuration information of the first frequency domain starting physical resource block (PRB) of the SL PRS;

[0016] Frequency domain starting subchannel configuration information of SL PRS;

[0017] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0018] Configuration information of the first occurrence period of SL PRS;

[0019] Sequence initialization ID configuration information of SL PRS.

[0020] Further, in the method for sending the direct link positioning reference signal SL PRS as described above, the first indication information is carried by at least one of the following:

[0021] Sidelink Control Information (SCI);

[0022] Sidelink Positioning Information (SPI);

[0023] Media Access Control Control Element (MAC CE);

[0024] Radio Resource Control (RRC) signaling;

[0025] Through link data packets;

[0026] Physical Sidelink Control Channel (PSCCH);

[0027] Physical Sidelink Shared Channel (PSSCH);

[0028] Physical Sidelink Broadcast Channel (PSBCH);

[0029] Physical Sidelink Feedback Channel (PSFCH);

[0030] Physical Sidelink Discovery Channel (PSDCH);

[0031] Physical Sidelink Positioning Channel (PSPCH).

[0032] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the transmission parameter information includes at least one of the following:

[0033] The number of time domain symbols of SL PRS;

[0034] The time domain symbol position of SL PRS;

[0035] Frequency domain pattern of SL PRS;

[0036] The first frequency domain starting PRB of the SL PRS;

[0037] The frequency domain starting subchannel of SL PRS;

[0038] The first frequency domain bandwidth of SL PRS;

[0039] The first occurrence cycle of SL PRS;

[0040] Sequence initialization ID of SL PRS;

[0041] SL PRS identification information.

[0042] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0043] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0044] A second frequency domain starting PRB of the first preset dedicated resource set;

[0045] a second frequency domain bandwidth of the first preset dedicated resource set;

[0046] a second occurrence period of the first preset dedicated resource set;

[0047] The number of SL PRS transmissions in each cycle;

[0048] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0049] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth (Bandwidth Part, referred to as BWP), occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0050] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when multiple first terminals share the first preset dedicated resource set, the method includes any one of the following:

[0051] The mapping position of the SL PRS and / or the code division multiplexing mode used correspond to the user identification of the first terminal or the second terminal, and the code division multiplexing mode is an orthogonal cover code (OCC) or a cyclic shift (CS);

[0052] Alternatively, a mapping position of the SL PRS and / or a code division multiplexing mode used is made to correspond to a resource mapping position of the SLPRS request signaling sent by the second terminal;

[0053] Alternatively, the SL PRS and at least one of the following are sent on a first preset dedicated resource set: PSCCH, PSSCH, PSPCH;

[0054] Alternatively, the SL PRS is sent on a first preset dedicated resource set, and at least one of the following is sent on a remaining resource set of the time slot where the SL PRS is located or on a first time slot separated from the first preset dedicated resource set by a preset number of time domain resources: PSCCH, PSSCH, PSPCH;

[0055] Among them, PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of SL PRS, and PSSCH or PSPCH is also used to carry positioning information.

[0056] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, when the first resource is determined in the direct link shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS satisfies at least one of the following conditions:

[0057] The first frequency domain bandwidth is the same as the third frequency domain bandwidth of the PSSCH resource set;

[0058] The first frequency domain bandwidth fully occupies the current resource pool;

[0059] The first frequency domain bandwidth spans across multiple resource pools;

[0060] The first frequency domain bandwidth occupies the entire BWP;

[0061] The first frequency domain bandwidth occupies the entire carrier.

[0062] Optionally, in the method for sending the direct link positioning reference signal SL PRS as described above, only the SL PRS is transmitted in the first resource, or the SL PRS and at least one of the following are transmitted in the first resource:

[0063] Demodulation reference signal of physical Sidelink control channel (PSSCH DMRS for short);

[0064] A first SCI for indicating decoding of a PSSCH;

[0065] A second SCI for indicating SL PRS transmission parameters and / or positioning information;

[0066] Dedicated information used to indicate SL PRS transmission parameters and / or positioning information;

[0067] MAC CE used to indicate SL PRS transmission parameters and / or positioning information;

[0068] RRC signaling for indicating SL PRS transmission parameters and / or positioning information;

[0069] Data information, data information can be used to indicate positioning information.

[0070] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, a mapping rule of the SL PRS on the first resource includes at least one of the following:

[0071] The orthogonal frequency division multiplexing (OFDM) symbol carrying the SL PRS only maps the SL PRS;

[0072] The SL PRS is not mapped on the OFDM symbol containing the first signal, and the first signal includes part or all of the first SCI, PSSCHDMRS, channel state information reference signal CSI RS, and phase tracking reference signal PTRS;

[0073] When the SL PRS has a resource conflict with part or all of the first signal, the SL-PRS is punctured, or the first signal is punctured;

[0074] When a resource conflict occurs between the SL PRS and data information, puncturing or rate matching is performed on the data information.

[0075] Specifically, as described above, in the method for sending a direct link positioning reference signal SL PRS, when the first frequency domain bandwidth spans multiple resource pools, each corresponding resource pool is provided with a PSCCH and / or a PSSCH.

[0076] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when the SL PRS and the first indication information are sent on the first resource, the first SCI is transmitted on the multiple resource pools spanned; wherein the multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in the corresponding resource pools.

[0077] Preferably, in the method for sending a direct link positioning reference signal SL PRS as described above, when the SL PRS and the first indication information are sent on the first resource, the first indication information is transmitted on at least one resource pool among the multiple resource pools spanned; wherein, when the first indication information is transmitted on more than one resource pool, the transmission configuration parameters indicated by the multiple first indication information are the same.

[0078] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the SL PRS sequence initialization ID is determined according to cyclic redundancy check (CRC) information of the first stage SCI, or according to the positioning priority of the first terminal.

[0079] Optionally, in the method for sending the direct link positioning reference signal SL PRS as described above, the first frequency domain starting PRB or the frequency domain starting subchannel is determined according to any one of the following:

[0080] The starting PRB position of the resource pool;

[0081] The third frequency domain starting PRB position of the bandwidth part BWP;

[0082] The frequency domain position of the common reference point Point A of the resource block grid;

[0083] The starting PRB position of PSCCH or PSSCH;

[0084] The starting PRB position of the carrier.

[0085] In another preferred embodiment of the present application, a method for receiving a direct link positioning reference signal SL PRS is provided, which is applied to a second terminal and includes:

[0086] Obtain the time-frequency resource configuration parameters of SL PRS;

[0087] The SL PRS or the SL PRS and the first indication information are received on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate the transmission parameter information on the first resource.

[0088] Preferably, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the first resource belongs to at least one of the following resource sets:

[0089] A first preset dedicated resource set;

[0090] Physical direct link shared channel PSSCH resource set.

[0091] Specifically, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the time-frequency resource configuration parameter includes at least one of the following:

[0092] SL PRS time domain symbol number configuration information;

[0093] Time domain symbol position configuration information of SL PRS;

[0094] Frequency domain pattern configuration information of SL PRS;

[0095] The first frequency domain starting PRB configuration information of SL PRS;

[0096] Frequency domain starting subchannel configuration information of SL PRS;

[0097] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0098] Configuration information of the first occurrence period of SL PRS;

[0099] Sequence initialization ID configuration information of SL PRS.

[0100] Preferably, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the first indication information is carried by at least one of the following:

[0101] Through link control information SCI;

[0102] Direct link positioning information SPI;

[0103] Media access control element MAC CE;

[0104] Radio Resource Control (RRC) signaling;

[0105] Through link data packets;

[0106] Physical direct link control channel PSCCH;

[0107] Physical direct link shared channel PSSCH;

[0108] Physical direct link broadcast channel PSBCH;

[0109] Physical direct link feedback channel PSFCH;

[0110] Physical direct link discovery channel PSDCH;

[0111] The physical direct link positioning channel PSPCH.

[0112] Specifically, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the transmission parameter information includes at least one of the following:

[0113] The number of time domain symbols of SL PRS;

[0114] The time domain symbol position of SL PRS;

[0115] Frequency domain pattern of SL PRS;

[0116] The first frequency domain starting PRB of the SL PRS;

[0117] The frequency domain starting subchannel of SL PRS;

[0118] The first frequency domain bandwidth of SL PRS;

[0119] The first occurrence cycle of SL PRS;

[0120] Sequence initialization ID of SL PRS;

[0121] SL PRS identification information.

[0122] Further, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, when the first resource belongs to the first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0123] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0124] A second frequency domain starting PRB of the first preset dedicated resource set;

[0125] a second frequency domain bandwidth of the first preset dedicated resource set;

[0126] a second occurrence period of the first preset dedicated resource set;

[0127] The number of SL PRS transmissions in each cycle;

[0128] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0129] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0130] Specifically, in the method for receiving the direct link positioning reference signal SL PRS as described above, when the first resource belongs to the first preset dedicated resource set, the method further includes any one of the following:

[0131] Determine, according to the user identifier of the first terminal or the second terminal, a mapping position of the SL PRS and / or a code division multiplexing mode used, where the code division multiplexing mode is OCC or CS;

[0132] Alternatively, determining the mapping position of the SL PRS and / or the code division multiplexing mode used according to the resource mapping position in the SL PRS request signaling sent by the second terminal;

[0133] Alternatively, the user information of the first terminal and the time-frequency resource information of the SL PRS are determined according to the received PSCCH, PSSCH or PSPCH, and / or the positioning information is determined according to the PSSCH or PSPCH, wherein the PSCCH, PSSCH, PSPCH are carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources.

[0134] In yet another preferred embodiment of the present application, a device for sending a direct link positioning reference signal SL PRS is provided, which is applied to a first terminal and includes:

[0135] The first processing module is used to obtain the time-frequency resource configuration parameters of the SL PRS;

[0136] The second processing module is used to determine the first resource, and send the SL PRS or the SL PRS and the first indication information on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate the transmission parameter information on the first resource.

[0137] Preferably, in the sending device as described above, the first resource is determined in at least one of the following resource sets:

[0138] A first preset dedicated resource set;

[0139] Physical direct link shared channel PSSCH resource set.

[0140] Specifically, in the transmitting device as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0141] SL PRS time domain symbol number configuration information;

[0142] Time domain symbol position configuration information of SL PRS;

[0143] Frequency domain pattern configuration information of SL PRS;

[0144] The first frequency domain starting PRB configuration information of SL PRS;

[0145] Frequency domain starting subchannel configuration information of SL PRS;

[0146] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0147] Configuration information of the first occurrence period of SL PRS;

[0148] Sequence initialization ID configuration information of SL PRS.

[0149] Further, in the sending device as described above, the first indication information is carried by at least one of the following:

[0150] Through link control information SCI;

[0151] Direct link positioning information SPI;

[0152] Media access control element MAC CE;

[0153] Radio Resource Control (RRC) signaling;

[0154] Through link data packets;

[0155] Physical direct link control channel PSCCH;

[0156] Physical direct link shared channel PSSCH;

[0157] Physical direct link broadcast channel PSBCH;

[0158] Physical direct link feedback channel PSFCH;

[0159] Physical direct link discovery channel PSDCH;

[0160] The physical direct link positioning channel PSPCH.

[0161] Specifically, in the sending device as described above, the transmission parameter information includes at least one of the following:

[0162] The number of time domain symbols of SL PRS;

[0163] The time domain symbol position of SL PRS;

[0164] Frequency domain pattern of SL PRS;

[0165] The first frequency domain starting PRB of the SL PRS;

[0166] The frequency domain starting subchannel of SL PRS;

[0167] The first frequency domain bandwidth of SL PRS;

[0168] The first occurrence cycle of SL PRS;

[0169] Sequence initialization ID of SL PRS;

[0170] SL PRS identification information.

[0171] Preferably, in the sending device as described above, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0172] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0173] A second frequency domain starting PRB of the first preset dedicated resource set;

[0174] a second frequency domain bandwidth of the first preset dedicated resource set;

[0175] a second occurrence period of the first preset dedicated resource set;

[0176] The number of SL PRS transmissions in each cycle;

[0177] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0178] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0179] Preferably, the sending device as described above, when multiple first terminals share the first preset dedicated resource set, further includes a fifth processing module configured to:

[0180] The mapping position of the SL PRS and / or the code division multiplexing mode used correspond to the user identity of the first terminal or the second terminal, where the code division multiplexing mode is an orthogonal cover code OCC or a cyclic shift CS;

[0181] Alternatively, a mapping position of the SL PRS and / or a code division multiplexing mode used is made to correspond to a resource mapping position of the SLPRS request signaling sent by the second terminal;

[0182] Alternatively, the SL PRS and at least one of the following are sent on a first preset dedicated resource set: PSCCH, PSSCH, PSPCH;

[0183] Alternatively, the SL PRS is sent on a first preset dedicated resource set, and at least one of the following is sent on a remaining resource set of the time slot where the SL PRS is located or on a first time slot separated from the first preset dedicated resource set by a preset number of time domain resources: PSCCH, PSSCH, PSPCH;

[0184] Among them, PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of SL PRS, and PSSCH or PSPCH is also used to carry positioning information.

[0185] Specifically, in the transmitting device as described above, when the first resource is determined in a direct link shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS satisfies at least one of the following conditions:

[0186] The first frequency domain bandwidth is the same as the third frequency domain bandwidth of the PSSCH resource set;

[0187] The first frequency domain bandwidth fully occupies the current resource pool;

[0188] The first frequency domain bandwidth spans across multiple resource pools;

[0189] The first frequency domain bandwidth occupies the entire BWP;

[0190] The first frequency domain bandwidth occupies the entire carrier.

[0191] Optionally, the sending device as described above transmits only the SL PRS in the first resource, or transmits the SL PRS and at least one of the following in the first resource:

[0192] Demodulation reference signal PSSCH DMRS of physical direct link control channel;

[0193] A first SCI for indicating decoding of a PSSCH;

[0194] A second SCI for indicating SL PRS transmission parameters and / or positioning information;

[0195] Dedicated information used to indicate SL PRS transmission parameters and / or positioning information;

[0196] MAC CE used to indicate SL PRS transmission parameters and / or positioning information;

[0197] RRC signaling for indicating SL PRS transmission parameters and / or positioning information;

[0198] Data information, data information can be used to indicate positioning information.

[0199] Preferably, in the sending device as described above, the mapping rule of the SL PRS on the first resource includes at least one of the following:

[0200] The OFDM symbol carrying the SL PRS only maps the SL PRS;

[0201] The SL PRS is not mapped on the OFDM symbol containing the first signal, and the first signal includes part or all of the first SCI, PSSCHDMRS, channel state information reference signal CSI RS, and phase tracking reference signal PTRS;

[0202] When the SL PRS has a resource conflict with part or all of the first signal, the SL-PRS is punctured, or the first signal is punctured;

[0203] When a resource conflict occurs between the SL PRS and data information, puncturing or rate matching is performed on the data information.

[0204] Specifically, as described above, in the transmitting device, when the first frequency domain bandwidth spans multiple resource pools, each corresponding resource pool is provided with a PSCCH and / or a PSSCH.

[0205] Preferably, as the sending device described above, when sending the SL PRS and the first indication information on the first resource, the first SCI is transmitted on the multiple resource pools spanned; wherein the multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in the corresponding resource pool.

[0206] Preferably, as the sending device as described above, when sending SL PRS and the first indication information on the first resource, the first indication information is transmitted on at least one resource pool among the multiple resource pools spanned; wherein, when the first indication information is transmitted on more than one resource pool, the transmission configuration parameters indicated by the multiple first indication information are the same.

[0207] Specifically, in the sending device as described above, the SL PRS sequence initialization ID is determined according to the cyclic redundancy check CRC information of the first stage SCI, or according to the positioning priority of the first terminal.

[0208] Optionally, in the transmitting device as described above, the first frequency domain starting PRB or the frequency domain starting subchannel is determined according to any one of the following:

[0209] The starting PRB position of the resource pool;

[0210] The third frequency domain starting PRB position of the bandwidth part BWP;

[0211] The frequency domain position of the common reference point Point A of the resource block grid;

[0212] The starting PRB position of PSCCH or PSSCH;

[0213] The starting PRB position of the carrier.

[0214] In another preferred embodiment of the present application, a device for receiving a direct link positioning reference signal SL PRS is provided, which is applied to a second terminal and includes:

[0215] The third processing module is used to obtain the time-frequency resource configuration parameters of the SL PRS;

[0216] The fourth processing module is used to determine the first resource, and receive the SL PRS or the SL PRS and the first indication information on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate the transmission parameter information on the first resource.

[0217] Preferably, in the receiving device as described above, the first resource belongs to at least one of the following resource sets:

[0218] A first preset dedicated resource set;

[0219] Physical direct link shared channel PSSCH resource set.

[0220] Specifically, in the receiving device as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0221] SL PRS time domain symbol number configuration information;

[0222] Time domain symbol position configuration information of SL PRS;

[0223] Frequency domain pattern configuration information of SL PRS;

[0224] The first frequency domain starting PRB configuration information of SL PRS;

[0225] Frequency domain starting subchannel configuration information of SL PRS;

[0226] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0227] Configuration information of the first occurrence period of SL PRS;

[0228] Sequence initialization ID configuration information of SL PRS.

[0229] Preferably, in the receiving device as described above, the first indication information is carried by at least one of the following:

[0230] Through link control information SCI;

[0231] Direct link positioning information SPI;

[0232] Media access control element MAC CE;

[0233] Radio Resource Control (RRC) signaling;

[0234] Through link data packets;

[0235] Physical direct link control channel PSCCH;

[0236] Physical direct link shared channel PSSCH;

[0237] Physical direct link broadcast channel PSBCH;

[0238] Physical direct link feedback channel PSFCH;

[0239] Physical direct link discovery channel PSDCH;

[0240] The physical direct link positioning channel PSPCH.

[0241] Specifically, in the receiving device as described above, the transmission parameter information includes at least one of the following:

[0242] The number of time domain symbols of SL PRS;

[0243] The time domain symbol position of SL PRS;

[0244] Frequency domain pattern of SL PRS;

[0245] The first frequency domain starting PRB of the SL PRS;

[0246] The frequency domain starting subchannel of SL PRS;

[0247] The first frequency domain bandwidth of SL PRS;

[0248] The first occurrence cycle of SL PRS;

[0249] Sequence initialization ID of SL PRS;

[0250] SL PRS identification information.

[0251] Further, in the receiving device as described above, when the first resource belongs to a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0252] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0253] A second frequency domain starting PRB of the first preset dedicated resource set;

[0254] a second frequency domain bandwidth of the first preset dedicated resource set;

[0255] a second occurrence period of the first preset dedicated resource set;

[0256] The number of SL PRS transmissions in each cycle;

[0257] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0258] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0259] Specifically, the receiving device as described above, when the first resource belongs to the first preset dedicated resource set, further includes a sixth processing module, configured to:

[0260] Determine, according to the user identifier of the first terminal or the second terminal, a mapping position of the SL PRS and / or a code division multiplexing mode used, where the code division multiplexing mode is OCC or CS;

[0261] Alternatively, determining the mapping position of the SL PRS and / or the code division multiplexing mode used according to the resource mapping position in the SL PRS request signaling sent by the second terminal;

[0262] Alternatively, the user information of the first terminal and the time-frequency resource information of the SL PRS are determined according to the received PSCCH, PSSCH or PSPCH, and / or the positioning information is determined according to the PSSCH or PSPCH, wherein the PSCCH, PSSCH, PSPCH are carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources.

[0263] In another preferred embodiment of the present application, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by a processor, the method for sending the direct link positioning reference signal SL PRS applied to the first terminal as described above is implemented, or the method for receiving the direct link positioning reference signal SLPRS applied to the second terminal as described above is implemented.

[0264] Compared with the prior art, the method for sending, method for receiving and device for direct link positioning reference signal provided in the embodiment of the present application have at least the following beneficial effects:

[0265] In an embodiment of the present application, by obtaining the time-frequency resource configuration parameters of the SL PRS, and carrying the SL PRS on the first resource for sending and receiving according to the time-frequency resource configuration parameters, and can be coordinated with the first indication information, it is beneficial to realize the transmission of the SL PRS when there is no base station involved in the scheduling and the physical layer channel structure is different from the existing uplink and downlink, and it is convenient to locate the sidelink according to the SL PRS. BRIEF DESCRIPTION OF THE DRAWINGS

[0266] Figure 1 A schematic diagram of a flow chart of a method for sending a direct link positioning reference signal SL PRS of the present application;

[0267] Figure 2 It is a schematic diagram of the frequency domain pattern during repeated mapping;

[0268] Figure 3 A schematic diagram of the configuration of a first preset dedicated resource set;

[0269] Figure 4 A schematic diagram of a structure for sending PSCCH, PSSCH and SL PRS on a first preset dedicated resource set;

[0270] Figure 5 One of the schematic diagrams of multiplexing the same first preset dedicated resource set for multiple user terminals;

[0271] Figure 6 Schematic diagram 2 of multiplexing the same first preset dedicated resource set for multiple user terminals;

[0272] Figure 7 is a schematic diagram of a first frequency domain bandwidth spanning multiple resource pools;

[0273] Figure 8 It is a schematic diagram of mapping only SL PRS on the first preset dedicated resource set; Fig. 9 It is a schematic diagram when SL PRS is not multiplexed with PSCCH, data information Data and PSSCH DMRS;

[0274] Fig.10 It is a schematic diagram of SL PRS and PSSCH DMRS multiplexing;

[0275] Fig.11 One of the schematic diagrams is that PSCCH and / or PSSCH are all set in multiple resource pools spanned by the first frequency domain bandwidth;

[0276] Fig.12 The second schematic diagram is that PSCCH and / or PSSCH are all set in multiple resource pools spanned by the first frequency domain bandwidth;

[0277] Fig.13 A schematic diagram of a flow chart of a method for receiving a direct link positioning reference signal SL PRS of the present application;

[0278] Fig.14 A schematic diagram of the structure of a device for sending a direct link positioning reference signal SL PRS of the present application;

[0279] Fig.15 It is a structural diagram of a device for receiving a direct link positioning reference signal SL PRS of the present application. DETAILED DESCRIPTION

[0280] In order to make the technical problems, technical solutions and advantages to be solved by the application clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the application. In addition, for clarity and brevity, the description of known functions and structures has been omitted.

[0281] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0282] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0283] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0284] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0285] See also Figure 1A preferred embodiment of the present application provides a method for sending a direct link positioning reference signal SL PRS, which is applied to a first terminal and includes:

[0286] Step S101, obtaining time-frequency resource configuration parameters of SL PRS;

[0287] Step S102: determine a first resource, and send a SL PRS or a SL PRS and first indication information on the first resource according to a time-frequency resource configuration parameter, where the first indication information is used to indicate transmission parameter information on the first resource.

[0288] In a preferred embodiment of the present application, a method for sending SL PRS applied to a first terminal is provided, which specifically includes: obtaining resource configuration parameters of SL PRS before sending so as to configure on the corresponding resources according to the resource configuration parameters so as to carry SL PRS on the corresponding resources, and sending SL PRS to the corresponding second terminal when sending resources, and further, determining the first resource for sending SL PRS so that SL PRS is carried on the first resource for sending, thereby ensuring the feasibility of sending SL PRS, wherein when sending SL PRS on the first resource, only SL PRS may be sent, or SL PRS and first indication information for indicating transmission parameter information on the first resource may be sent. In a specific embodiment, when the time-frequency resource configuration information is jointly determined by the first terminal and the second terminal, only SL PRS may be sent to locate the sidelink; when there is information determined only by the first terminal in the time-frequency resource configuration information of SL PRS, SL PRS and first indication information need to be sent on the first resource to locate the sidelink, so that the second terminal can accurately obtain all time-frequency resource configuration information of SL PRS according to the first indication information, thereby ensuring accurate transmission of SL PRS.

[0289] To summarize, in an embodiment of the present application, by obtaining the time-frequency resource configuration parameters of the SL PRS, and carrying the SL PRS on a predetermined first resource for transmission according to the time-frequency resource configuration parameters, and cooperating with the first indication information, it is beneficial to realize the transmission of the SL PRS when there is no base station involved in the scheduling and the physical layer channel structure is different from the existing uplink and downlink, and it is convenient to locate the sidelink according to the SL PRS.

[0290] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, the first resource is determined in at least one of the following resource sets:

[0291] A first preset dedicated resource set;

[0292] Physical direct link shared channel PSSCH resource set.

[0293] In a preferred embodiment of the present application, the first resource can be determined in a single resource set or in multiple resource sets, wherein the resource set includes but is not limited to a first preset dedicated resource set and a PSSCH resource set, etc. In a specific embodiment, when the first resource is jointly determined by the first preset dedicated resource set and the PSSCH resource set, the SL PRS can be carried on the resources of the first preset dedicated resource set, and the first indication information is carried on the resources of the PSSCH resource set.

[0294] Preferably, by configuring the first preset dedicated resource set, the impact on traditional terminals can be avoided, and the interference of other signals to SL PRS can be reduced. At the same time, a larger frequency domain bandwidth can be allocated to SL PRS, which is conducive to ensuring positioning accuracy.

[0295] It should be noted that the resource collection here can also be represented by a resource pool, etc.

[0296] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0297] SL PRS time domain symbol number configuration information;

[0298] Time domain symbol position configuration information of SL PRS;

[0299] Frequency domain pattern configuration information of SL PRS;

[0300] The first frequency domain starting PRB configuration information of SL PRS;

[0301] Frequency domain starting subchannel configuration information of SL PRS;

[0302] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0303] Configuration information of the first occurrence period of SL PRS;

[0304] Sequence initialization ID configuration information of SL PRS.

[0305] In a specific embodiment of the present application, the time-frequency resource configuration parameters of the SL PRS are illustrated by way of example. In actual configuration, the time-frequency resource configuration parameters may include at least one of the above items.

[0306] It should be noted that each of the above-mentioned time-frequency resource configuration parameters can be configured or pre-configured through RRC signaling, or determined according to the first terminal's own information. When determined by the first terminal's own information, it is necessary to indicate through the first indication information so that the receiving end receiving the SL PRS can accurately obtain the SL PRS according to the first indication information.

[0307] It should also be noted that in a specific embodiment of the present application, the frequency domain pattern configuration information of the SL PRS is a comb-shaped size, including but not limited to the comb size (comb size), the resource element (RE) of each PRB of the starting symbol, and the mapping offset of the RE granularity on each symbol. For the case where each symbol is repeatedly mapped, only the RE mapping position in each PRB in the frequency domain is required, see Figure 2 , where the left side is an illustration of the frequency domain pattern on the right side after offset. For the user terminal, the comb tooth size is 4, the mapping RE position revealed on each PRB of the starting symbol is index = 0, and the mapping offset on each symbol is {0,2,1,3}.

[0308] It should be noted that the granularity of the first frequency domain bandwidth in the first frequency domain bandwidth configuration information of SL PRS is subchannel or PRB, and the time-frequency resource configuration parameters include the first frequency domain starting PRB configuration information of SL PRS, and may not include the frequency domain starting subchannel configuration information of SL PRS; or, the time-frequency resource configuration parameters include the frequency domain starting subchannel configuration information of SL PRS, and may not include the first frequency domain starting PRB configuration information of SL PRS.

[0309] Further, in the method for sending the direct link positioning reference signal SL PRS as described above, the first indication information is carried by at least one of the following:

[0310] Sidelink Control Information (SCI);

[0311] Sidelink Positioning Information (SPI);

[0312] Media Access Control Control Element (MAC CE);

[0313] Radio Resource Control (RRC) signaling;

[0314] Through link data packets;

[0315] Physical Sidelink Control Channel (PSCCH);

[0316] Physical Sidelink Shared Channel (PSSCH);

[0317] Physical Sidelink Broadcast Channel (PSBCH);

[0318] Physical Sidelink Feedback Channel (PSFCH);

[0319] Physical Sidelink Discovery Channel (PSDCH);

[0320] Physical Sidelink Positioning Channel (PSPCH).

[0321] Here, it should be noted that “SPI” refers to the type of indication information used to indicate positioning related information on the direct link, but the name of the type of indication information indicating positioning related information is not limited to SPI.

[0322] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the transmission parameter information includes at least one of the following:

[0323] The number of time domain symbols of SL PRS;

[0324] The time domain symbol position of SL PRS;

[0325] Frequency domain pattern of SL PRS;

[0326] The first frequency domain starting PRB of the SL PRS;

[0327] The frequency domain starting subchannel of SL PRS;

[0328] The first frequency domain bandwidth of SL PRS;

[0329] The first occurrence cycle of SL PRS;

[0330] Sequence initialization ID of SL PRS;

[0331] SL PRS identification information.

[0332] It should be noted that since the first indication information is used to indicate the transmission parameter information on the first resource, the type of the transmission parameter information corresponds to the type of the resource configuration parameter, and the number of types of transmission parameter information in actual transmission corresponds to the number of types of resource configuration parameters determined based on the first terminal's own information, thereby ensuring the integrity of the first indication information when it is indicated.

[0333] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0334] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0335] A second frequency domain starting PRB of the first preset dedicated resource set;

[0336] a second frequency domain bandwidth of the first preset dedicated resource set;

[0337] a second occurrence period of the first preset dedicated resource set;

[0338] The number of SL PRS transmissions in each cycle;

[0339] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0340] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0341] In a preferred implementation of the present application, when the first resource needs to be determined in the first preset dedicated resource set, the first preset dedicated resource set will be configured first, that is, the symbol position in the time slot corresponding to the first preset dedicated resource set, the second frequency domain starting PRB, the second frequency domain bandwidth, the second occurrence period, the number of SL PRS transmissions in each period, and the number of time domain resources between two adjacent SL PRSs in each period are first obtained through RRC signaling configuration or pre-configuration, such as Figure 3 As shown, period is the period of the first preset dedicated resource, slot is the time slot, and PRS is the SL PRS. Since the configuration of the above configuration parameters will change the structure of the time slot, there is a certain impact on the calculation of the transport block size (Transport blockSize, referred to as TBS), so it is necessary to introduce a new information field in the first stage SCI to indicate the number of symbols or specific overhead occupied by the SL PRS when calculating the TBS in the current time slot.

[0342] Specifically, in this embodiment, an example is given of the second frequency domain bandwidth occupation mode, wherein the second frequency domain bandwidth can occupy the current resource pool, span multiple resource pools, occupy the entire partial bandwidth BWP, occupy the entire carrier and / or occupy a preset number of PRBs. In actual use, the second frequency domain bandwidth can be determined according to the actual occupied bandwidth of the SL PRS.

[0343] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when multiple first terminals share the first preset dedicated resource set, the method includes any one of the following:

[0344] The mapping position of the SL PRS and / or the code division multiplexing mode used correspond to the user identity of the first terminal or the second terminal, where the code division multiplexing mode is an orthogonal cover code OCC or a cyclic shift CS;

[0345] Alternatively, a mapping position of the SL PRS and / or a code division multiplexing mode used is made to correspond to a resource mapping position of the SLPRS request signaling sent by the second terminal;

[0346] Alternatively, the SL PRS and at least one of the following are sent on a first preset dedicated resource set: PSCCH, PSSCH, PSPCH;

[0347] Alternatively, the SL PRS is sent on a first preset dedicated resource set, and at least one of the following is sent on a remaining resource set of the time slot where the SL PRS is located or on a first time slot separated from the first preset dedicated resource set by a preset number of time domain resources: PSCCH, PSSCH, PSPCH;

[0348] Among them, PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of SL PRS, and PSSCH or PSPCH is also used to carry positioning information.

[0349] In another preferred embodiment of the present application, multiple first terminals can reuse the same dedicated resources in the first preset dedicated resource set. At this time, in order to ensure the accuracy of positioning, the resources corresponding to different first terminals are orthogonalized, for example, by establishing a corresponding relationship between the mapping position of the SL PRS and / or the code division multiplexing method used and the resource mapping position in the terminal or SL PRS request signaling; or the remaining resource set in the same time slot or the first time slot with a preset number of time domain resources is sent to indicate user information time-frequency resource information PSCCH, PSSCH and / or PSPCH, wherein PSSCH or PSPCH is also used to carry positioning information (such as Figure 4 Through the above operation, the resources occupied by multiple user terminals can be orthogonal (as shown in Figure 5 The user information includes but is not limited to the source ID of the user terminal.

[0350] It should be noted that the above-mentioned code division multiplexing mode is orthogonal cover code OCC or cyclic shift CS, which is related to the sequence type adopted by SL PRS. When the Gold sequence is adopted, the code division multiplexing mode is OCC, and when the ZC sequence is adopted, the code division multiplexing mode is CS.

[0351] Specifically, PSCCH, PSSCH, and PSPCH can be carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources, see Figure 6 shown.

[0352] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, when the first resource is determined in the direct link shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS satisfies at least one of the following conditions:

[0353] The first frequency domain bandwidth is the same as the third frequency domain bandwidth of the PSSCH resource set;

[0354] The first frequency domain bandwidth fully occupies the current resource pool;

[0355] The first frequency domain bandwidth spans across multiple resource pools;

[0356] The first frequency domain bandwidth occupies the entire BWP;

[0357] The first frequency domain bandwidth occupies the entire carrier.

[0358] In another preferred embodiment of the present application, when the first resource is determined in the PSSCH resource set, the first frequency domain bandwidth of the SLPRS is limited, wherein the first frequency domain bandwidth can be selected as needed to be the same as the third frequency domain bandwidth of the PSSCH resource set, fill the current resource pool, span multiple resource pools, fill the entire BWP, or fill the entire carrier, which is conducive to reducing resource waste while ensuring transmission requirements. When the first frequency domain bandwidth fills the current resource pool, spans multiple resource pools, fills the entire BWP, or fills the entire carrier (such as Figure 7 As shown, Figure 7 The first frequency domain bandwidth in the method spans multiple resource pools), so that the bandwidth occupied by SL-PRS will not be restricted, and a certain positioning accuracy can be guaranteed.

[0359] Optionally, in the method for sending the direct link positioning reference signal SL PRS as described above, only the SL PRS is transmitted in the first resource, or the SL PRS and at least one of the following are transmitted in the first resource:

[0360] Demodulation reference signal PSSCH DMRS of physical direct link control channel;

[0361] A first SCI for indicating decoding of a PSSCH;

[0362] A second SCI for indicating SL PRS transmission parameters and / or positioning information;

[0363] Dedicated information used to indicate SL PRS transmission parameters and / or positioning information;

[0364] MAC CE used to indicate SL PRS transmission parameters and / or positioning information;

[0365] RRC signaling for indicating SL PRS transmission parameters and / or positioning information;

[0366] Data information, data information can be used to indicate positioning information.

[0367] Optionally, when the first resource is determined in the PSSCH resource set, the first resource will transmit other related information while transmitting the SL PRS, such as: PSSCH DMRS; a first SCI indicating the decoded PSSCH; a second SCI, dedicated information, MAC CE and / or RRC signaling indicating SL PRS transmission parameters and / or positioning information; data information indicating positioning information, etc., so that the second terminal used to receive the first resource can accurately know the location of the SL PRS and the positioning information.

[0368] It should be noted that the above-mentioned first SCI, second SCI and dedicated information may be at least one of the first stage SCI, the second stage SCI or the third stage SCI dedicated to indicating transmission parameters and / or positioning information.

[0369] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, the mapping rule of the SL PRS on the first resource includes at least one of the following:

[0370] The OFDM symbol carrying the SL PRS only maps the SL PRS;

[0371] The SL PRS is not mapped on the OFDM symbol containing the first signal, and the first signal includes part or all of the first SCI, PSSCHDMRS, channel state information reference signal CSI RS, and phase tracking reference signal PTRS;

[0372] When the SL PRS has a resource conflict with part or all of the first signal, the SL-PRS is punctured, or the first signal is punctured;

[0373] When a resource conflict occurs between the SL PRS and data information, puncturing or rate matching is performed on the data information.

[0374] In a specific embodiment of the present application, when the first resource is determined in the PSSCH resource set, the mapping of the SL PRS on the first resource should be mapped according to a preset mapping rule, wherein the mapping rule includes:

[0375] In order to avoid resource conflicts between SL PRS and other information and not reduce the power spectral density (PSD) of SL PRS, only SL PRS is mapped in the OFDM symbol carrying SL PRS, and other information is not mapped, such as Figure 8 As shown, it is a schematic diagram of mapping only SL PRS on the first preset dedicated resource set;

[0376] At the same time, since SL PRS is prone to resource conflict with the first signal, it is necessary to avoid mapping SL PRS on OFDM symbols containing the first signal, where the first signal includes but is not limited to the first SCI, PSSCH DMRS, channel state information reference signal (CSI RS for short), phase tracking reference signal (PTRS for short) or part of all;

[0377] When, due to factors such as resource limitations, it is inevitable that the OFDM symbol carrying SL PRS needs to map other information, if a resource conflict occurs between SL PRS and other information, the SL PRS or other information is processed according to the specific type of other information. Specifically, when the SL PRS has a resource conflict with part or all of the first signal, the SL-PRS is punctured, or the first signal is punctured; when the SL PRS has a resource conflict with data information, the data information is punctured or rate matched.

[0378] In a specific embodiment of the present application, an example is given of a sending method when the SL PRS is carried by the PSSCH and the SL PRS and the PSSCH occupy the same bandwidth, wherein: Fig. 9 It is a schematic diagram when SL PRS and PSCCH, data information Data and PSSCH DMRS are not multiplexed; Fig.10This is a schematic diagram of SL PRS and PSSCH DMRS multiplexing; specifically, when PSSCH DMRS and SL PRS are multiplexed, the PSSCH DMRS can be directly used or the PSSCH DMRS and SL PRS can be used for positioning; further, when PSSCH DMRS and SL PRS are mapped to the same OFDM symbol, the PSSCH DMRS can be used as the SL PRS on the symbol.

[0379] Through the above-mentioned setting of SL PRS, the compatibility with R16 and R17 user terminals is better, the original resource perception mechanism is not damaged, the first-stage SCI does not need to be modified, and there is no need to specifically set the resource perception reference signal of R16 and R17 to be PSSCH DMRS.

[0380] It should be noted that the SL PRS can be continuous or discontinuous in the time domain. In addition to being used for positioning, the SL PRS can also be used for auxiliary channel estimation. Specifically, as described above, in the method for sending the direct link positioning reference signal SL PRS, when the first frequency domain bandwidth spans multiple resource pools, each corresponding resource pool is provided with a PSCCH and / or a PSSCH.

[0381] Here, it should be noted that when the first resource is determined in the PSSCH resource set, PSCCH and / or PSSCH (such as Fig.11 or Fig.12 as shown) in order to accurately know the complete SL PRS.

[0382] Preferably, in the method for sending the direct link positioning reference signal SL PRS as described above, when the SL PRS and the first indication information are sent on the first resource, the first SCI is transmitted on the multiple resource pools spanned; wherein the multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in the corresponding resource pools.

[0383] Here, it should be noted that when the first frequency domain bandwidth spans multiple resource pools and the first resource is also used to send the first indication information, the first SCI is transmitted in each one; wherein, multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in their respective corresponding resource pools, so as to accurately obtain the complete SL PRS by decoding the PSSCH.

[0384] Preferably, in the method for sending a direct link positioning reference signal SL PRS as described above, when the SL PRS and the first indication information are sent on the first resource, the first indication information is transmitted on at least one resource pool among the multiple resource pools spanned; wherein, when the first indication information is transmitted on more than one resource pool, the transmission configuration parameters indicated by the multiple first indication information are the same.

[0385] Here, it should be noted that when the first frequency domain bandwidth spans multiple resource pools and the first resource also sends a first indication information, the first indication information is transmitted on the multiple resource pools spanned; wherein the transmission configuration parameters indicated by the multiple first indication information are the same, so as to accurately obtain the complete SL PRS.

[0386] Specifically, in the method for sending the direct link positioning reference signal SL PRS as described above, the SL PRS sequence initialization ID is determined according to the cyclic redundancy check CRC information of the first stage SCI, or is determined according to the positioning priority of the first terminal.

[0387] In a specific embodiment of the present application, the method for obtaining the SL PRS sequence initialization ID in the time-frequency resource configuration parameters is limited, wherein the SL PRS sequence initialization ID can be determined based on the cyclic redundancy check CRC information of the first stage SCI and generated by its corresponding information bits, or determined based on the positioning priority of the first terminal.

[0388] Optionally, in the method for sending the direct link positioning reference signal SL PRS as described above, the first frequency domain starting PRB or the frequency domain starting subchannel is determined according to any one of the following:

[0389] The starting PRB position of the resource pool;

[0390] The third frequency domain starting PRB position of the bandwidth part BWP;

[0391] The frequency domain position of the common reference point Point A of the resource block grid;

[0392] The starting PRB position of PSCCH or PSSCH;

[0393] The starting PRB position of the carrier.

[0394] In another preferred embodiment of the present application, the method for obtaining the first frequency domain starting PRB or the frequency domain starting subchannel in the time-frequency resource configuration parameters of the SL PRS is limited, wherein the starting PRB position of the resource pool, the third frequency domain starting PRB position of the bandwidth part BWP, the frequency domain position of the common reference point Point A of the resource block grid, the starting PRB position of the PSCCH or PSSCH, and the starting PRB position of the carrier can all be used as reference information of the first frequency domain starting PRB or the frequency domain starting subchannel. When determining the first frequency domain starting PRB or the frequency domain starting subchannel, the above reference information can be directly used as the first frequency domain starting PRB or the frequency domain starting subchannel, or a preset offset can be performed on the basis of the above reference information.

[0395] See also Fig.13 In another preferred embodiment of the present application, a method for receiving a direct link positioning reference signal SLPRS is provided, which is applied to a second terminal and includes:

[0396] Step S1301, obtaining time-frequency resource configuration parameters of SL PRS;

[0397] Step S1302: determine a first resource, and receive a SL PRS or a SL PRS and first indication information on the first resource according to a time-frequency resource configuration parameter, where the first indication information is used to indicate transmission parameter information on the first resource.

[0398] In a preferred embodiment of the present application, a receiving method for SL PRS applied to a second terminal is provided, which specifically includes: when receiving SL PRS, the resource configuration parameters of SL PRS will be obtained first, and after determining the first resource for sending SL PRS, SL PRS can be received on the corresponding first resource according to the resource configuration parameters. When receiving SL PRS on the first resource, only SL PRS can be received according to the type of sending resource, or SL PRS and first indication information for indicating transmission parameter information on the first resource can be received. In a specific embodiment, when the time-frequency resource configuration information is jointly determined by the first terminal and the second terminal, only SL PRS can be received to locate the sidelink; when the time-frequency resource configuration information of SL PRS contains information determined only by the first terminal, it is necessary to receive SL PRS and the first indication information on the first resource to locate the sidelink, so that the second terminal can accurately obtain all time-frequency resource configuration information of SL PRS according to the first indication information, and ensure accurate transmission of SL PRS.

[0399] To summarize, in an embodiment of the present application, by obtaining the time-frequency resource configuration parameters of the SL PRS, and receiving the SL PRS from the first resource according to the time-frequency resource configuration parameters, and cooperating with the first indication information, it is beneficial to realize the transmission of the SL PRS when there is no base station involved in the scheduling and the physical layer channel structure is different from the existing uplink and downlink, and it is convenient to locate the sidelink according to the SL PRS.

[0400] Preferably, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the first resource belongs to at least one of the following resource sets:

[0401] A first preset dedicated resource set;

[0402] Physical direct link shared channel PSSCH resource set.

[0403] In a preferred embodiment of the present application, the first resource can be determined in a single resource set or in multiple resource sets, wherein the resource set includes but is not limited to a first preset dedicated resource set and a PSSCH resource set, etc. In a specific embodiment, when the first resource is jointly determined by the first preset dedicated resource set and the PSSCH resource set, the SL PRS can be carried on the resources of the first preset dedicated resource set, and the first indication information is carried on the resources of the PSSCH resource set.

[0404] Preferably, by configuring the first preset dedicated resource set, the impact on traditional terminals can be avoided, and the interference of other signals to SL PRS can be reduced. At the same time, a larger frequency domain bandwidth can be allocated to SL PRS, which is conducive to ensuring positioning accuracy.

[0405] It should be noted that the resource collection here can also be represented by a resource pool, etc.

[0406] Specifically, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the time-frequency resource configuration parameter includes at least one of the following:

[0407] SL PRS time domain symbol number configuration information;

[0408] Time domain symbol position configuration information of SL PRS;

[0409] Frequency domain pattern configuration information of SL PRS;

[0410] The first frequency domain starting PRB configuration information of SL PRS;

[0411] Frequency domain starting subchannel configuration information of SL PRS;

[0412] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0413] Configuration information of the first occurrence period of SL PRS;

[0414] Sequence initialization ID configuration information of SL PRS.

[0415] In a specific embodiment of the present application, the time-frequency resource configuration parameters of the SL PRS are illustrated by way of example. In actual configuration, the time-frequency resource configuration parameters may include at least one of the above items.

[0416] It should be noted that each of the above-mentioned time-frequency resource configuration parameters can be configured or pre-configured through RRC signaling, or determined according to the first indication information. When determined according to the first indication information, it means that this part of the information is determined based on the first terminal's own information.

[0417] It should also be noted that in a specific embodiment of the present application, the frequency domain pattern configuration information of the SL PRS is a comb-shaped size, including but not limited to the comb size (comb size), the resource element (RE) of each PRB of the starting symbol, and the mapping offset of the RE granularity on each symbol. For the case where each symbol is repeatedly mapped, only the RE mapping position in each PRB in the frequency domain is required, see Figure 2 For the user terminal, the comb tooth size is 4, the mapping RE position revealed on each PRB of the starting symbol is index = 0, and the mapping offset on each symbol is {0, 2, 1, 3}.

[0418] It should be noted that the granularity of the first frequency domain bandwidth in the first frequency domain bandwidth configuration information of SL PRS is subchannel or PRB, and the time-frequency resource configuration parameters include the first frequency domain starting PRB configuration information of SL PRS, and may not include the frequency domain starting subchannel configuration information of SL PRS, or the time-frequency resource configuration parameters include the frequency domain starting subchannel configuration information of SL PRS, and may not include the first frequency domain starting PRB configuration information of SL PRS.

[0419] Preferably, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the first indication information is carried by at least one of the following:

[0420] Through link control information SCI;

[0421] Direct link positioning information SPI;

[0422] Media access control element MAC CE;

[0423] Radio Resource Control (RRC) signaling;

[0424] Through link data packets;

[0425] Physical direct link control channel PSCCH;

[0426] Physical direct link shared channel PSSCH;

[0427] Physical direct link broadcast channel PSBCH;

[0428] Physical direct link feedback channel PSFCH;

[0429] Physical direct link discovery channel PSDCH;

[0430] The physical direct link positioning channel PSPCH.

[0431] Here, it should be noted that “SPI” refers to the type of indication information used to indicate positioning related information on the direct link, but the name of the type of indication information indicating positioning related information is not limited to SPI.

[0432] Specifically, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, the transmission parameter information includes at least one of the following:

[0433] The number of time domain symbols of SL PRS;

[0434] The time domain symbol position of SL PRS;

[0435] Frequency domain pattern of SL PRS;

[0436] The first frequency domain starting PRB of the SL PRS;

[0437] The frequency domain starting subchannel of SL PRS;

[0438] The first frequency domain bandwidth of SL PRS;

[0439] The first occurrence cycle of SL PRS;

[0440] Sequence initialization ID of SL PRS;

[0441] SL PRS identification information.

[0442] It should be noted that since the first indication information is used to indicate the transmission parameter information on the first resource, the type of the transmission parameter information corresponds to the type of the resource configuration parameter, and the number of types of transmission parameter information in actual transmission corresponds to the number of types of resource configuration parameters determined based on the first terminal's own information, thereby ensuring the integrity of the first indication information when it is indicated.

[0443] Further, in the above-mentioned method for receiving the direct link positioning reference signal SL PRS, when the first resource belongs to the first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0444] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0445] A second frequency domain starting PRB of the first preset dedicated resource set;

[0446] a second frequency domain bandwidth of the first preset dedicated resource set;

[0447] a second occurrence period of the first preset dedicated resource set;

[0448] The number of SL PRS transmissions in each cycle;

[0449] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0450] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0451] In a preferred implementation of the present application, when the first resource needs to be determined in the first preset dedicated resource set, the first preset dedicated resource set will be configured first, that is, the symbol position in the time slot corresponding to the first preset dedicated resource set, the second frequency domain starting PRB, the second frequency domain bandwidth, the second occurrence period, the number of SL PRS transmissions in each period, and the number of time domain resources between two adjacent SL PRSs in each period are first obtained through RRC signaling configuration or pre-configuration, such as Figure 3 As shown. Since the configuration of the above configuration parameters will change the structure of the time slot, which has a certain impact on the calculation of TBS, it is necessary to introduce a new information field in the first stage SCI to indicate the number of symbols or specific overhead occupied by SL PRS when calculating TBS in the current time slot.

[0452] Specifically, in this embodiment, an example is given of the second frequency domain bandwidth occupation mode, wherein the second frequency domain bandwidth can occupy the current resource pool, span multiple resource pools, occupy the entire partial bandwidth BWP, occupy the entire carrier and / or occupy a preset number of PRBs. In actual use, the second frequency domain bandwidth can be determined according to the actual occupied bandwidth of the SL PRS.

[0453] Specifically, in the method for receiving the direct link positioning reference signal SL PRS as described above, when the first resource belongs to the first preset dedicated resource set, the method further includes any one of the following:

[0454] Determine, according to the user identifier of the first terminal or the second terminal, a mapping position of the SL PRS and / or a code division multiplexing mode used, where the code division multiplexing mode is OCC or CS;

[0455] Alternatively, determining the mapping position of the SL PRS and / or the code division multiplexing mode used according to the resource mapping position in the SL PRS request signaling sent by the second terminal;

[0456] Alternatively, the user information of the first terminal and the time-frequency resource information of the SL PRS are determined according to the received PSCCH, PSSCH or PSPCH, and / or the positioning information is determined according to the PSSCH or PSPCH, wherein the PSCCH, PSSCH, PSPCH are carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources.

[0457] In another preferred embodiment of the present application, multiple first terminals can reuse the same dedicated resource in the first preset dedicated resource set. At this time, in order to ensure the accuracy of positioning, the resources corresponding to different first terminals are orthogonalized. Therefore, when sending, the multiple resources are orthogonalized according to the preset rules. Therefore, when receiving, it is necessary to determine the corresponding first resource again according to the preset rules, wherein the resource receiving method corresponds to the resource sending method, for example, when mapping by user identification (such as Figure 4 As shown), the mapping position of the SL PRS and / or the code division multiplexing method used are determined according to the user identification of the first terminal or the second terminal, thereby determining the corresponding SL PRS; when indicated by at least one of PSCCH, PSSCH and PSPCH (such as Figure 5 As shown), obtain the PSCCH, PSSCH and / or PSPCH at a preset position, and determine the user information of the first terminal and the time-frequency resource information of the SL PRS according to the PSCCH, PSSCH or PSPCH, and / or determine the positioning information according to the PSSCH or PSPCH. The user information includes but is not limited to the source ID of the user terminal.

[0458] Specifically, PSCCH, PSSCH, and PSPCH can be carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources, see Figure 6 shown.

[0459] It should be noted that the above-mentioned code division multiplexing mode is orthogonal cover code OCC or cyclic shift CS, which is related to the sequence type adopted by SL PRS. When the Gold sequence is adopted, the code division multiplexing mode is OCC, and when the ZC sequence is adopted, the code division multiplexing mode is CS.

[0460] See also Fig.14 In another preferred embodiment of the present application, a device for sending a direct link positioning reference signal SLPRS is provided, which is applied to a first terminal and includes:

[0461] The first processing module 1401 is used to obtain the time-frequency resource configuration parameters of the SL PRS;

[0462] The second processing module 1402 is used to determine the first resource, and send the SL PRS or the SL PRS and the first indication information on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate the transmission parameter information on the first resource.

[0463] Preferably, in the sending device as described above, the first resource is determined in at least one of the following resource sets:

[0464] A first preset dedicated resource set;

[0465] Physical direct link shared channel PSSCH resource set.

[0466] Specifically, in the transmitting device as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0467] SL PRS time domain symbol number configuration information;

[0468] Time domain symbol position configuration information of SL PRS;

[0469] Frequency domain pattern configuration information of SL PRS;

[0470] The first frequency domain starting PRB configuration information of SL PRS;

[0471] Frequency domain starting subchannel configuration information of SL PRS;

[0472] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0473] Configuration information of the first occurrence period of SL PRS;

[0474] Sequence initialization ID configuration information of SL PRS.

[0475] Further, in the sending device as described above, the first indication information is carried by at least one of the following:

[0476] Through link control information SCI;

[0477] Direct link positioning information SPI;

[0478] Media access control element MAC CE;

[0479] Radio Resource Control (RRC) signaling;

[0480] Through link data packets;

[0481] Physical direct link control channel PSCCH;

[0482] Physical direct link shared channel PSSCH;

[0483] Physical direct link broadcast channel PSBCH;

[0484] Physical direct link feedback channel PSFCH;

[0485] Physical direct link discovery channel PSDCH;

[0486] The physical direct link positioning channel PSPCH.

[0487] Specifically, in the sending device as described above, the transmission parameter information includes at least one of the following:

[0488] The number of time domain symbols of SL PRS;

[0489] The time domain symbol position of SL PRS;

[0490] Frequency domain pattern of SL PRS;

[0491] The first frequency domain starting PRB of the SL PRS;

[0492] The frequency domain starting subchannel of SL PRS;

[0493] The first frequency domain bandwidth of SL PRS;

[0494] The first occurrence cycle of SL PRS;

[0495] Sequence initialization ID of SL PRS;

[0496] SL PRS identification information.

[0497] Preferably, in the sending device as described above, when the first resource is determined in a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0498] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0499] A second frequency domain starting PRB of the first preset dedicated resource set;

[0500] a second frequency domain bandwidth of the first preset dedicated resource set;

[0501] a second occurrence period of the first preset dedicated resource set;

[0502] The number of SL PRS transmissions in each cycle;

[0503] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0504] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0505] Preferably, the sending device as described above, when multiple first terminals share the first preset dedicated resource set, further includes a fifth processing module configured to:

[0506] The mapping position of the SL PRS and / or the code division multiplexing mode used correspond to the user identity of the first terminal or the second terminal, where the code division multiplexing mode is an orthogonal cover code OCC or a cyclic shift CS;

[0507] Alternatively, a mapping position of the SL PRS and / or a code division multiplexing mode used is made to correspond to a resource mapping position of the SLPRS request signaling sent by the second terminal;

[0508] Alternatively, the SL PRS and at least one of the following are sent on a first preset dedicated resource set: PSCCH, PSSCH, PSPCH;

[0509] Alternatively, the SL PRS is sent on a first preset dedicated resource set, and at least one of the following is sent on a remaining resource set of the time slot where the SL PRS is located or on a first time slot separated from the first preset dedicated resource set by a preset number of time domain resources: PSCCH, PSSCH, PSPCH;

[0510] Among them, PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of SL PRS, and PSSCH or PSPCH is also used to carry positioning information.

[0511] Specifically, in the transmitting device as described above, when the first resource is determined in a direct link shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS satisfies at least one of the following conditions:

[0512] The first frequency domain bandwidth is the same as the third frequency domain bandwidth of the PSSCH resource set;

[0513] The first frequency domain bandwidth fully occupies the current resource pool;

[0514] The first frequency domain bandwidth spans across multiple resource pools;

[0515] The first frequency domain bandwidth occupies the entire BWP;

[0516] The first frequency domain bandwidth occupies the entire carrier.

[0517] Optionally, the sending device as described above transmits only the SL PRS in the first resource, or transmits the SL PRS and at least one of the following in the first resource:

[0518] Demodulation reference signal PSSCH DMRS of physical direct link control channel;

[0519] A first SCI for indicating decoding of a PSSCH;

[0520] A second SCI for indicating SL PRS transmission parameters and / or positioning information;

[0521] Dedicated information used to indicate SL PRS transmission parameters and / or positioning information;

[0522] MAC CE used to indicate SL PRS transmission parameters and / or positioning information;

[0523] RRC signaling for indicating SL PRS transmission parameters and / or positioning information;

[0524] Data information, data information can be used to indicate positioning information.

[0525] Preferably, in the sending device as described above, the mapping rule of the SL PRS on the first resource includes at least one of the following:

[0526] The OFDM symbol carrying the SL PRS only maps the SL PRS;

[0527] The SL PRS is not mapped on the OFDM symbol containing the first signal, and the first signal includes part or all of the first SCI, PSSCHDMRS, channel state information reference signal CSI RS, and phase tracking reference signal PTRS;

[0528] When the SL PRS has a resource conflict with part or all of the first signal, the SL-PRS is punctured, or the first signal is punctured;

[0529] When a resource conflict occurs between the SL PRS and data information, puncturing or rate matching is performed on the data information.

[0530] Specifically, as described above, in the transmitting device, when the first frequency domain bandwidth spans multiple resource pools, each corresponding resource pool is provided with a PSCCH and / or a PSSCH.

[0531] Preferably, as the sending device described above, when sending the SL PRS and the first indication information on the first resource, the first SCI is transmitted on the multiple resource pools spanned; wherein the multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in the corresponding resource pool.

[0532] Preferably, as the sending device as described above, when sending SL PRS and the first indication information on the first resource, the first indication information is transmitted on at least one resource pool among the multiple resource pools spanned; wherein, when the first indication information is transmitted on more than one resource pool, the transmission configuration parameters indicated by the multiple first indication information are the same.

[0533] Specifically, in the sending device as described above, the SL PRS sequence initialization ID is determined according to the cyclic redundancy check CRC information of the first stage SCI, or according to the positioning priority of the first terminal.

[0534] Optionally, in the transmitting device as described above, the first frequency domain starting PRB or the frequency domain starting subchannel is determined according to any one of the following:

[0535] The starting PRB position of the resource pool;

[0536] The third frequency domain starting PRB position of the bandwidth part BWP;

[0537] The frequency domain position of the common reference point Point A of the resource block grid;

[0538] The starting PRB position of PSCCH or PSSCH;

[0539] The starting PRB position of the carrier.

[0540] An embodiment of the sending device of the present application is a sending device corresponding to the embodiment of the method for sending a direct link positioning reference signal SL PRS applied to the second terminal. All implementation means in the embodiment of the method for sending a direct link positioning reference signal SL PRS applied to the second terminal are applicable to the embodiment of the sending device and can achieve the same technical effect.

[0541] See also Fig.15 In another preferred embodiment of the present application, a device for receiving a direct link positioning reference signal SLPRS is provided, which is applied to a second terminal and includes:

[0542] The third processing module 1501 is used to obtain the time-frequency resource configuration parameters of the SL PRS;

[0543] The fourth processing module 1502 is used to determine the first resource, and receive the SL PRS or the SL PRS and first indication information on the first resource according to the time-frequency resource configuration parameters, where the first indication information is used to indicate the transmission parameter information on the first resource.

[0544] Preferably, in the receiving device as described above, the first resource belongs to at least one of the following resource sets:

[0545] A first preset dedicated resource set;

[0546] Physical direct link shared channel PSSCH resource set.

[0547] Specifically, in the receiving device as described above, the time-frequency resource configuration parameter includes at least one of the following:

[0548] SL PRS time domain symbol number configuration information;

[0549] Time domain symbol position configuration information of SL PRS;

[0550] Frequency domain pattern configuration information of SL PRS;

[0551] The first frequency domain starting PRB configuration information of SL PRS;

[0552] Frequency domain starting subchannel configuration information of SL PRS;

[0553] First frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB;

[0554] Configuration information of the first occurrence period of SL PRS;

[0555] Sequence initialization ID configuration information of SL PRS.

[0556] Preferably, in the receiving device as described above, the first indication information is carried by at least one of the following:

[0557] Through link control information SCI;

[0558] Direct link positioning information SPI;

[0559] Media access control element MAC CE;

[0560] Radio Resource Control (RRC) signaling;

[0561] Through link data packets;

[0562] Physical direct link control channel PSCCH;

[0563] Physical direct link shared channel PSSCH;

[0564] Physical direct link broadcast channel PSBCH;

[0565] Physical direct link feedback channel PSFCH;

[0566] Physical direct link discovery channel PSDCH;

[0567] The physical direct link positioning channel PSPCH.

[0568] Specifically, in the receiving device as described above, the transmission parameter information includes at least one of the following:

[0569] The number of time domain symbols of SL PRS;

[0570] The time domain symbol position of SL PRS;

[0571] Frequency domain pattern of SL PRS;

[0572] The first frequency domain starting PRB of the SL PRS;

[0573] The frequency domain starting subchannel of SL PRS;

[0574] The first frequency domain bandwidth of SL PRS;

[0575] The first occurrence cycle of SL PRS;

[0576] Sequence initialization ID of SL PRS;

[0577] SL PRS identification information.

[0578] Further, in the receiving device as described above, when the first resource belongs to a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include:

[0579] The symbol positions occupied by the first preset dedicated resource set in each time slot;

[0580] A second frequency domain starting PRB of the first preset dedicated resource set;

[0581] a second frequency domain bandwidth of the first preset dedicated resource set;

[0582] a second occurrence period of the first preset dedicated resource set;

[0583] The number of SL PRS transmissions in each cycle;

[0584] The number of time domain resources between two adjacent SL PRSs in each cycle;

[0585] Among them, the second frequency domain bandwidth occupancy mode includes occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying at least one of the preset number of PRBs.

[0586] Specifically, the receiving device as described above, when the first resource belongs to the first preset dedicated resource set, further includes a sixth processing module, configured to:

[0587] Determine, according to the user identifier of the first terminal or the second terminal, a mapping position of the SL PRS and / or a code division multiplexing mode used, where the code division multiplexing mode is OCC or CS;

[0588] Alternatively, determining the mapping position of the SL PRS and / or the code division multiplexing mode used according to the resource mapping position in the SL PRS request signaling sent by the second terminal;

[0589] Alternatively, the user information of the first terminal and the time-frequency resource information of the SL PRS are determined according to the received PSCCH, PSSCH or PSPCH, and / or the positioning information is determined according to the PSSCH or PSPCH, wherein the PSCCH, PSSCH, PSPCH are carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources.

[0590] An embodiment of the receiving device of the present application is a receiving device corresponding to the embodiment of the receiving method of the direct link positioning reference signal SL PRS applied to the second terminal. All implementation means in the embodiment of the receiving method of the direct link positioning reference signal SL PRS applied to the second terminal are applicable to the embodiment of the receiving device and can achieve the same technical effect.

[0591] In another preferred embodiment of the present application, a computer-readable storage medium is also provided, on which a computer program is stored. When the computer program is executed by a processor, the method for sending the direct link positioning reference signal SL PRS applied to the first terminal as described above is implemented, or the method for receiving the direct link positioning reference signal SLPRS applied to the second terminal as described above is implemented.

[0592] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0593] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0594] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for sending a direct link positioning reference signal SL PRS, applied to a first terminal, characterized in that: include: Obtain the time-frequency resource configuration parameters of SL PRS; Determine a first resource, and send the SL PRS or SLPRS and first indication information on the first resource according to the time-frequency resource configuration parameter, where the first indication information is used to indicate transmission parameter information on the first resource; The first resource is determined from at least one of the following resource sets: A first preset dedicated resource set; Physical direct link shared channel PSSCH resource set; The mapping rule of the SL PRS on the first resource includes at least one of the following: The orthogonal frequency division multiplexing OFDM symbol carrying the SL PRS only maps the SL PRS; The SL PRS is not mapped on an OFDM symbol containing a first signal, wherein the first signal includes part or all of a first SCI for indicating decoding of the PSSCH, a demodulation reference signal PSSCH DMRS of a physical direct link control channel, a channel state information reference signal CSI RS, and a phase tracking reference signal PTRS; When a resource conflict occurs between the SL PRS and the PTRS, the SL PRS performs puncturing on the PTRS; When a resource conflict occurs between the SL PRS and the data information on the first resource, performing puncturing or rate matching on the data information; The symbols mapping the SL PRS are continuous.

2. The method for sending a direct link positioning reference signal SL PRS according to claim 1, characterized in that: The time-frequency resource configuration parameter includes at least one of the following: The time domain symbol number configuration information of the SL PRS; Time domain symbol position configuration information of the SL PRS; Frequency domain pattern configuration information of the SL PRS; First frequency domain starting PRB configuration information of the SL PRS; Frequency domain starting subchannel configuration information of the SL PRS; The first frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB; Configuration information of the first occurrence period of the SL PRS; The sequence initialization ID configuration information of the SL PRS.

3. The method for sending a direct link positioning reference signal SL PRS according to claim 1, characterized in that: The first indication information is carried by at least one of the following: Through link control information SCI; Direct link positioning information SPI; Media access control element MAC CE; Radio Resource Control (RRC) signaling; Through link data packets; Physical direct link control channel PSCCH; Physical direct link shared channel PSSCH; Physical direct link broadcast channel PSBCH; Physical direct link feedback channel PSFCH; Physical direct link discovery channel PSDCH; The physical direct link positioning channel PSPCH.

4. The method for sending a direct link positioning reference signal SL PRS according to claim 1, characterized in that: The transmission parameter information includes at least one of the following: The number of time domain symbols of the SL PRS; The time domain symbol position of the SL PRS; The frequency domain pattern of the SL PRS; A first frequency domain starting PRB of the SL PRS; The frequency domain starting subchannel of the SL PRS; A first frequency domain bandwidth of the SL PRS; The first occurrence period of the SL PRS; The SL PRS identification information.

5. The method for sending a direct link positioning reference signal SL PRS according to claim 1, characterized in that: When the first resource is determined in the first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include: The symbol positions occupied by the first preset dedicated resource set in each time slot; A second frequency domain starting PRB of the first preset dedicated resource set; a second frequency domain bandwidth of the first preset dedicated resource set; a second occurrence period of the first preset dedicated resource set; The number of transmissions of the SL PRS in each cycle; The number of time domain resources between two adjacent SL PRSs in each cycle; Among them, the second frequency domain bandwidth occupancy mode includes at least one of occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying a preset number of PRBs.

6. The method for sending a direct link positioning reference signal SL PRS according to claim 5, characterized in that: When multiple first terminals share the first preset dedicated resource set, the method includes any one of the following: The mapping position of the SL PRS and / or the code division multiplexing mode used correspond to the user identification of the first terminal or the second terminal, where the code division multiplexing mode is an orthogonal cover code OCC or a cyclic shift CS; Alternatively, the mapping position of the SL PRS and / or the code division multiplexing mode used are made to correspond to the resource mapping position of the SL PRS request signaling sent by the second terminal; Alternatively, the SL PRS and at least one of the following are sent on the first preset dedicated resource set: PSCCH, PSSCH, PSPCH; Alternatively, the SL PRS is sent on the first preset dedicated resource set, and at least one of the following is sent on the remaining resource set of the time slot where the SL PRS is located or on the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources: PSCCH, PSSCH, PSPCH; The PSCCH, PSSCH or PSPCH is used to carry user information indicating the first terminal and time-frequency resource information of the SLPRS, and the PSSCH or PSPCH is also used to carry positioning information.

7. The method for sending a direct link positioning reference signal SL PRS according to claim 1, characterized in that: When the first resource is determined in the direct link shared channel PSSCH resource set, the first frequency domain bandwidth of the SL PRS is the same as the third frequency domain bandwidth of the PSSCH resource set.

8. The method for sending a direct link positioning reference signal SL PRS according to claim 7, characterized in that: Only the SL PRS is transmitted on the first resource, or the SL PRS and at least one of the following are transmitted on the first resource: the PSSCH DMRS; the first SCI; A second SCI for indicating the SL PRS transmission parameter and / or positioning information; Dedicated information for indicating the SL PRS transmission parameters and / or positioning information; A MAC CE used to indicate the SL PRS transmission parameters and / or positioning information; RRC signaling used to indicate the SL PRS transmission parameters and / or positioning information; The data information.

9. The method for sending a direct link positioning reference signal SL PRS according to claim 8, characterized in that: When the first frequency domain bandwidth spans multiple resource pools, each corresponding resource pool is provided with a PSCCH and / or a PSSCH.

10. The method for sending a direct link positioning reference signal SL PRS according to claim 9, characterized in that: When the SL PRS and the first indication information are sent on the first resource, the first SCI is transmitted on the multiple resource pools spanned; wherein the multiple first SCIs respectively indicate the transmission configuration parameters of the PSSCH resource set in the corresponding resource pool.

11. The method for sending a direct link positioning reference signal SL PRS according to claim 9, characterized in that: When the SL PRS and the first indication information are sent on the first resource, the first indication information is transmitted on at least one resource pool among the multiple resource pools spanned; wherein, when the first indication information is transmitted on more than one resource pool, the transmission configuration parameters indicated by the multiple first indication information are the same.

12. The method for sending a direct link positioning reference signal SL PRS according to claim 2, characterized in that: The SL PRS sequence initialization ID is determined according to cyclic redundancy check CRC information of the first stage SCI, or according to the positioning priority of the first terminal.

13. The method for sending a direct link positioning reference signal SL PRS according to claim 2 or 4, characterized in that: The first frequency domain starting PRB or the frequency domain starting subchannel is determined according to any one of the following: The starting PRB position of the resource pool; The third frequency domain starting PRB position of the bandwidth part BWP; The frequency domain position of the common reference point Point A of the resource block grid; The starting PRB position of PSCCH or PSSCH; The starting PRB position of the carrier.

14. A method for receiving a direct link positioning reference signal SL PRS, applied to a second terminal, characterized in that: include: Obtain the time-frequency resource configuration parameters of SL PRS; Determine a first resource, and receive the SL PRS or SLPRS and first indication information on the first resource according to the time-frequency resource configuration parameter, where the first indication information is used to indicate transmission parameter information on the first resource; The first resource belongs to at least one of the following resource sets: A first preset dedicated resource set; Physical direct link shared channel PSSCH resource set; The mapping rule of the SL PRS on the first resource includes at least one of the following: The orthogonal frequency division multiplexing OFDM symbol carrying the SL PRS only maps the SL PRS; The SL PRS is not mapped on an OFDM symbol containing a first signal, wherein the first signal includes part or all of a first SCI for indicating decoding of the PSSCH, a demodulation reference signal PSSCH DMRS of a physical direct link control channel, a channel state information reference signal CSI RS, and a phase tracking reference signal PTRS; When a resource conflict occurs between the SL PRS and the PTRS, the SL PRS performs puncturing on the PTRS; When a resource conflict occurs between the SL PRS and the data information on the first resource, performing puncturing or rate matching on the data information; The symbols mapping the SL PRS are continuous.

15. The method for receiving a direct link positioning reference signal SL PRS according to claim 14, characterized in that: The time-frequency resource configuration parameter includes at least one of the following: The time domain symbol number configuration information of the SL PRS; Time domain symbol position configuration information of the SL PRS; Frequency domain pattern configuration information of the SL PRS; First frequency domain starting PRB configuration information of the SL PRS; Frequency domain starting subchannel configuration information of the SL PRS; The first frequency domain bandwidth configuration information of the SL PRS, wherein the granularity of the first frequency domain bandwidth is a subchannel or a PRB; Configuration information of the first occurrence period of the SL PRS; The sequence initialization ID configuration information of the SL PRS.

16. The method for receiving a direct link positioning reference signal SL PRS according to claim 14, characterized in that: The first indication information is carried by at least one of the following: Through link control information SCI; Direct link positioning information SPI; Media access control element MAC CE; Radio Resource Control (RRC) signaling; Through link data packets; Physical direct link control channel PSCCH; Physical direct link shared channel PSSCH; Physical direct link broadcast channel PSBCH; Physical direct link feedback channel PSFCH; Physical direct link discovery channel PSDCH; The physical direct link positioning channel PSPCH.

17. The method for receiving a direct link positioning reference signal SL PRS according to claim 14, characterized in that: The transmission parameter information includes at least one of the following: The number of time domain symbols of the SL PRS; The time domain symbol position of the SL PRS; The frequency domain pattern of the SL PRS; A first frequency domain starting PRB of the SL PRS; The frequency domain starting subchannel of the SL PRS; A first frequency domain bandwidth of the SL PRS; The first occurrence period of the SL PRS; The SL PRS identification information.

18. The method for receiving a direct link positioning reference signal SL PRS according to claim 14, characterized in that: When the first resource belongs to a first preset dedicated resource set, the configuration parameters of the first preset dedicated resource set include: The symbol positions occupied by the first preset dedicated resource set in each time slot; A second frequency domain starting PRB of the first preset dedicated resource set; a second frequency domain bandwidth of the first preset dedicated resource set; a second occurrence period of the first preset dedicated resource set; The number of transmissions of the SL PRS in each cycle; The number of time domain resources between two adjacent SL PRSs in each cycle; Among them, the second frequency domain bandwidth occupancy mode includes at least one of occupying the current resource pool, spanning multiple resource pools, occupying the entire partial bandwidth BWP, occupying the entire carrier and occupying a preset number of PRBs.

19. The method for receiving a direct link positioning reference signal SL PRS according to claim 18, characterized in that: When the first resource belongs to a first preset dedicated resource set, the method further includes any one of the following: Determine, according to a user identifier of the first terminal or the second terminal, a mapping position of the SL PRS and / or a code division multiplexing mode used, where the code division multiplexing mode is OCC or CS; Alternatively, determining the mapping position of the SL PRS and / or the code division multiplexing mode used according to the resource mapping position in the SL PRS request signaling sent by the second terminal; Alternatively, the user information of the first terminal and the time-frequency resource information of the SLPRS are determined according to the received PSCCH, PSSCH or PSPCH, and / or the positioning information is determined according to the PSSCH or PSPCH, wherein the PSCCH, the PSSCH, the PSPCH are carried on the first preset dedicated resource set, the remaining resources of the time slot where the SL PRS is located, or the first time slot that is separated from the first preset dedicated resource set by a preset number of time domain resources.

20. A device for transmitting a direct link positioning reference signal SL PRS, applied to a first terminal, characterized in that: include: The first processing module is used to obtain the time-frequency resource configuration parameters of the SL PRS; A second processing module is used to determine a first resource, and send the SL PRS or the SL PRS and first indication information on the first resource according to the time-frequency resource configuration parameter, where the first indication information is used to indicate transmission parameter information on the first resource; The first resource is determined from at least one of the following resource sets: A first preset dedicated resource set; Physical direct link shared channel PSSCH resource set; The mapping rule of the SL PRS on the first resource includes at least one of the following: The orthogonal frequency division multiplexing OFDM symbol carrying the SL PRS only maps the SL PRS; The SL PRS is not mapped on an OFDM symbol containing a first signal, wherein the first signal includes part or all of a first SCI for indicating decoding of the PSSCH, a demodulation reference signal PSSCH DMRS of a physical direct link control channel, a channel state information reference signal CSI RS, and a phase tracking reference signal PTRS; When a resource conflict occurs between the SL PRS and the PTRS, the SL PRS performs puncturing on the PTRS; When a resource conflict occurs between the SL PRS and the data information on the first resource, performing puncturing or rate matching on the data information; The symbols mapping the SL PRS are continuous.

21. A device for receiving a direct link positioning reference signal SL PRS, applied to a second terminal, characterized in that: include: The third processing module is used to obtain the time-frequency resource configuration parameters of the SL PRS; a fourth processing module, configured to determine a first resource, and receive the SL PRS or the SL PRS and first indication information on the first resource according to the time-frequency resource configuration parameter, wherein the first indication information is used to indicate transmission parameter information on the first resource; The first resource belongs to at least one of the following resource sets: A first preset dedicated resource set; Physical direct link shared channel PSSCH resource set; The mapping rule of the SL PRS on the first resource includes at least one of the following: The orthogonal frequency division multiplexing OFDM symbol carrying the SL PRS only maps the SL PRS; The SL PRS is not mapped on an OFDM symbol containing a first signal, wherein the first signal includes part or all of a first SCI for indicating decoding of the PSSCH, a demodulation reference signal PSSCH DMRS of a physical direct link control channel, a channel state information reference signal CSI RS, and a phase tracking reference signal PTRS; When a resource conflict occurs between the SL PRS and the PTRS, the SL PRS performs puncturing on the PTRS; When a resource conflict occurs between the SL PRS and the data information on the first resource, performing puncturing or rate matching on the data information; The symbols mapping the SL PRS are continuous.

22. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method for sending a direct link positioning reference signal SL PRS applied to a first terminal as described in any one of claims 1 to 12, or the method for receiving a direct link positioning reference signal SL PRS applied to a second terminal as described in any one of claims 14 to 19.

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