MÉTODO DE TRANSMISSÃO DE ENLACE LATERAL E DISPOSITIVO TERMINAL

Abstract

Provided are a sidelink transmission method and a terminal device. The method comprises: a terminal device sends or receives a first sidelink positioning reference signal in a first resource pool, wherein the first resource pool is one of the following: a dedicated resource pool for a sidelink positioning reference signal; and a shared resource pool for a sidelink positioning reference signal and a sidelink data channel.

Description

1 / 68 SIDE LINK TRANSMISSION METHOD AND TERMINAL DEVICE FIELD OF TECHNIQUE

[001] This application relates to the field of communication technologies and, more specifically, to a side-link transmission method and a terminal device. BACKGROUND

[002] A sidelink positioning reference signal (SL PRS) can be transmitted within a dedicated resource pool for an SL PRS or a shared resource pool for both an SL PRS and a sidelink data channel. How to indicate a transmission resource for an SL PRS within the shared resource pool or the dedicated resource pool is a problem to be solved. SUMMARY

[003] The embodiments of this application provide a side-link transmission method and a terminal device. The following describes in detail various aspects involved in the embodiments of this application.

[004] According to a first aspect, a side-link transmission method is provided. The side-link transmission method includes: transmitting or receiving, by a terminal device within a first resource pool, a first side-link positioning reference signal, where the first resource pool is one of the following: a resource pool dedicated to a side-link positioning reference signal; or a resource pool shared for a side-link positioning reference signal. Petition 870250084704, dated 09 / 19 / 2025, p. 8 / 184 2 / 68 lateral link placement and a lateral link data channel.

[005] According to a second aspect, a terminal device is provided. The terminal device includes: a communications module, configured to transmit or receive, within a first resource pool, a first side-link positioning reference signal, where the first resource pool is one of the following: a resource pool dedicated to a side-link positioning reference signal; or a resource pool shared for a side-link positioning reference signal and a side-link data channel.

[006] According to a third aspect, a terminal device is provided, and the terminal device includes a transceiver, a memory, and a processor. The memory is configured to store a program, and the processor is configured to: invoke a program in memory and control the transceiver to receive or transmit a signal, so that a terminal device executes the method according to the first aspect.

[007] According to a fourth aspect, an apparatus is provided. The apparatus includes a processor, configured to invoke a program from memory to make the apparatus execute the method according to the first aspect.

[008] According to a fifth aspect, a chip is provided. The chip includes a processor configured to invoke a program from memory to cause a device in which the chip is installed to execute the method according to the first aspect. Petition 870250084704, dated 09 / 19 / 2025, page 9 / 184 3 / 68

[009] According to a sixth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores a program that causes a computer to execute the method according to the first aspect.

[0010] According to a seventh aspect, a computer program product is provided, and the computer program product includes a program that causes a computer to execute the method according to the first aspect.

[0011] According to an eighth aspect, a computer program is provided, where the computer program causes a computer to execute the method according to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an example diagram of a system architecture for a wireless communications system to which embodiments of this application are applicable.

[0013] Figure 2 is an example diagram of a resource pool for physical sidelink control channels (PSCCH) and physical sidelink control channels (PSSCH).

[0014] Figure 3 is a schematic diagram of a slot structure in a new radio (NR) system.

[0015] Figure 4 is an example diagram of a resource selection process in a second resource selection mode.

[0016] Figure 5 is an example diagram of features for transmitting a reference signal of Petition 870250084704, dated 09 / 19 / 2025, page 10 / 184 4 / 68 Downlink Positioning Reference Signal (DL PRS).

[0017] Figure 6 is a schematic structural diagram of an interlocked feature block.

[0018] Figure 7 is an example diagram of a frame structure for a sidelink over unlicensed spectrum (SL-U) system.

[0019] Figure 8 is an example diagram of resource block (RB) sets.

[0020] Figure 9 is a schematic flowchart of a side link transmission method according to one embodiment of this request.

[0021] Figure 10 is an illustrative diagram of the association relationships between PSCCH resources and SL PRS resources, according to one modality of this request.

[0022] Figure 11 is an example of a diagram of association relationships between PSCCH resources and SL PRS resources according to another modality of this request.

[0023] Figure 12 is an example of a diagram of association relationships between PSCCH resources and SL PRS resources according to another modality of this request.

[0024] Figure 13 is a schematic structural diagram of a terminal device, according to an embodiment of this application.

[0025] Figure 14 is a schematic structural diagram of an apparatus according to an embodiment of this application. DESCRIPTION OF MODALITIES

[0026] Technical solutions in this request are Petition 870250084704, dated 09 / 19 / 2025, page 11 / 184 5 / 68 described below with reference to the attached drawings. COMMUNICATIONS SYSTEM ARCHITECTURE

[0027] Figure 1 is an example diagram of a system architecture for a wireless communications system 100 to which embodiments of this application are applicable. The wireless communications system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with a terminal device 120 within that coverage.

[0028] Figure 1 shows a network device and a terminal device as examples. Optionally, the wireless communications system 100 may include one or more network devices 110 and / or one or more terminal devices 120. For a network device 110, one or more terminal devices 120 may be located within the network coverage of the network device 110, or may be located outside the network coverage of the network device 110, or may be located partially within the network coverage of the network device 110 and partially outside the network coverage of the network device 110, which is not limited to the embodiments of this application.

[0029] Optionally, the 100 wireless communications system may additionally include another network entity, such as a network controller or a mobility management entity, which is not limited to the embodiments of this application.

[0030] It should be understood that the technical solutions of the modalities of this request can be applied to various Petition 870250084704, dated 09 / 19 / 2025, page 12 / 184 6 / 68 communication systems, such as a fifth-generation (5G) system or a new radio (NR) system, a long-term evolution (LTE) system, a frequency division duplex (FDD) LTE system, and a time division duplex (TDD) LTE system. The technical solutions provided in this application may additionally be applied to a future communications system, such as a 6th-generation mobile communications system or a satellite communications system.

[0031] The terminal device in embodiments of this application may also be referred to as user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile site, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communications device, a user agent, or a user appliance. The terminal device in embodiments of this application may be a device that provides the user with voice and / or data connectivity and is capable of connecting people, objects, and machines, such as a portable device or a vehicle-mounted device that has wireless connectivity.The terminal device in embodiments of this application may be a mobile phone, a tablet computer (Pad), a notebook, a handheld computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, or a wireless control terminal. Petition 870250084704, dated 09 / 19 / 2025, page 13 / 184 7 / 68 industrial (industrial control), a wireless terminal in autonomous driving (self-driving), a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or similar. Optionally, the UE can be configured to function as a base station. For example, the UE can function as a scheduling entity, providing a side link signal between UEs in V2X, D2D, or similar. For example, a cell phone and a vehicle communicate with each other through a side link signal. A cell phone and a smart home device communicate with each other without relaying a communication signal through a base station.

[0032] The network device in the embodiments of this application may be a device for communicating with the terminal device. The network device may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of this application may be a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. The base station may broadly encompass the following various names, or may be replaced by the following names, such as a Node B, an evolved Node B (eNB), a next-generation Node B (gNB), a relay station, an access point, a transmitting and receiving point (TRP), a point of Petition 870250084704, dated 09 / 19 / 2025, p. 14 / 184 8 / 68 transmitting point (TP), a master eNode (MeNB), a secondary eNode (SeNB), a multi-pattern radio node (MSR), a home base station, a network controller, an access node, a radio node, an access point (AP), a transmitting node, a transceiver node, a baseband unit (BBU), a remote radio unit (RRU), an active antenna unit (AAU), a remote radio head (RRH), a central unit (CU), a distributed unit (DU), and a positioning node. The base station may be a macro base station, a micro base station, a relay node, a donor node, or similar, or a combination thereof. Alternatively, the base station may be a communications module, a modem, or a chip housed in the device or apparatus described above.Alternatively, the base station may be a mobile switching center, a device that functions as a base station in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, a device that functions as a base station in a future communications system, or similar. The base station may support networks of the same access technology or different access technologies. A specific technology and a specific device used by the network device are not limited in the embodiments of this application.

[0033] The base station can be stationary or mobile. For example, a helicopter or an unmanned aerial vehicle can be configured to act as a mobile base station, and one or more cells can move based on the Petition 870250084704, dated 09 / 19 / 2025, page 15 / 184 9 / 68 mobile base station position. In another example, a helicopter or an unmanned aerial vehicle can be configured to serve as a device communicating with another base station.

[0034] In some deployments, the network device in the embodiments of this application may be a CU or a DU, or the network device includes both a CU and a DU. The gNB may additionally include an AAU.

[0035] The network device and the terminal device may be deployed on land, including in indoor or outdoor environments, portable or vehicle-mounted, may be deployed on the water surface, or may be deployed on an airplane, a balloon, or a satellite in the air. In the embodiments of this application, a scenario in which the network device and the terminal device are located is not limited.

[0036] It should be understood that all or part of the communication device functions in this application may alternatively be implemented by software functions running on hardware or by virtualization functions instantiated on a platform (e.g., a cloud platform). DETERMINATION OF A RESOURCE IN THE FREQUENCY DOMAIN NR-V2X

[0037] As with LTE-V2X, frequency-domain resources within an NRV2X resource cluster can be contiguous, and the granularity of frequency-domain resource allocation can be a subchannel. Generally, the number of physical resource blocks (PRBs) included in a subchannel is {10, 12, 15, 20, 50, 75, 100}, where the smallest subchannel size is Petition 870250084704, dated 09 / 19 / 2025, page 16 / 184 10 / 68 of 10 PRBs, that is, much larger than the smallest subchannel size in LTE-V2X: 4 PRBs. This is mainly because a frequency-domain feature of a PSCCH in NR-V2X is located in the first subchannel of a PSSCH associated with the PSCCH, a frequency-domain feature of the PSCCH is smaller than or equal to the size of a PSSCH subchannel, and a time-domain feature of the PSCCH occupies two or three orthogonal frequency-division multiplexing (OFDM) symbols. If the configured subchannel size is relatively small, there may be very few resources available to the PSCCH, resulting in an increased bit error rate and degradation of the PSCCH's detection performance. In NR-V2X, the size of a PSSCH subchannel and the size of a frequency-domain feature of a PSCCH are configured independently. The feature size in the PSCCH frequency domain is generally smaller than or equal to the PSSCH subchannel size.

[0038] In some implementations, the following configuration parameters in the NR-V2X resource pool configuration information are used to determine the frequency domain resources within a resource pool for a PSCCH and a PSSCH: subchannel size (sl-SubchannelSize), number of subchannels (sl-NumSubchannel), subchannel start resource block (RB) index (sl-StartRB-Subchannel), number of PRBs (sl-RB-Number), and PSCCH frequency domain resource indicator (sl-FreqResourcePSCCH).

[0039] The previous subchannel size may indicate a number of consecutive PRBs included in a subchannel in a resource pool. A subchannel size value may be {10, 12, 15, 20, 50, 75, 100} PRBs.

[0040] The number of subchannels mentioned above Petition 870250084704, dated 09 / 19 / 2025, page 17 / 184 11 / 68 may indicate the number of subchannels included in a feature set.

[0041] The initial RB index of the mentioned subchannel may indicate the initial PRB index of the first subchannel in a resource pool.

[0042] The number of PRBs mentioned above may indicate a number of consecutive PRBs included in a set of features.

[0043] The frequency domain feature indicator above can indicate the size of a frequency domain feature of a PSCCH. Typically, a frequency domain feature indicator value for PSCCH is {10, 12, 15, 20, 25} PRBs.

[0044] In some implementations, when a terminal device determines a resource pool used for PSSCH transmission or reception, a frequency domain resource included in the resource pool may be slNumSubchannel consecutive subchannels starting from a PRB indicated by sl-StartRB-Subchannel. If the number of PRBs included in the consecutive subchannels sl-NumSubchannel is less than the number of PRBs indicated by sl-RB-Number, the remaining PRBs cannot be used for PSSCH transmission or reception.

[0045] In NR-V2X, a start location in the frequency domain of a PSCCH can be aligned with a start location in the frequency domain of the first subchannel of a PSSCH associated with the PSCCH. Therefore, a start location of each subchannel of the PSSCH is a possible start location in the frequency domain of the PSCCH. The frequency domain ranges of the resource pool for the PSCCH and the PSSCH can Petition 870250084704, dated 09 / 19 / 2025, page 18 / 184 12 / 68 to be determined based on the parameters mentioned above. Figure 2 is a schematic diagram of a resource grouping for a PSCCH and a PSSCH.

[0046] Typically, the PSCCH is used to carry sidelink control information related to resource listening. In some implementations, the information carried by the PSCCH may include one or more of the following: a scheduled transmission priority, frequency domain resource allocation, time domain resource allocation, a PSSCH reference signal pattern, a second-stage sidelink control information (SCI) format, a second-stage SCI bit rate offset, a number of PSSCH demodulation reference signal (DMRS) ports, a modulation and coding scheme (MCS), an MCS table indicator, a number of physical sidelink feedback channel (PSFCH) symbols, a resource reservation period, a reserved bit, or similar.

[0047] Frequency domain resource allocation is used to indicate a quantity of frequency domain resources of a PSSCH within a current slot scheduled by means of a PSCCH, and an initial quantity and location of frequency domain resources of a maximum of two reserved relay resources.

[0048] Time-domain resource allocation is used to indicate time-domain locations of at most two relay resources.

[0049] The resource reservation period is Petition 870250084704, dated 09 / 19 / 2025, page 19 / 184 13 / 68 is used to reserve a resource used to transmit another transport block (TB) in a subsequent period. Typically, this information bit field does not exist when resource reservation between TBs is not enabled in a resource pool configuration.

[0050] A number of reserved bits, usually two to four bits, can be configured by a network or pre-configured.

[0051] Because the PSCCH and the scheduled PSSCH are transmitted in the same slot, and an initial location of a PRB occupied by the PSCCH may be an initial location of the first subchannel of the scheduled PSSCH, an initial location of the scheduled PSSCH in the time-frequency domain is not explicitly indicated in the PSCCH above (i.e., an SCI 1-A format). DETERMINATION OF A RESOURCE IN THE NRV2X TIME DOMAIN (SLOT)

[0052] In NR-V2X, PSCCH / PSSCH transmission is generally performed on a slot basis. In other words, only one PSCCH / PSSCH can be transmitted in a slot, and the transmission of a plurality of PSCCHs / PSSCHs in a time-division multiplexing (TDM) manner in a slot is not supported. Furthermore, PSCCHs / PSSCHs from different users can be multiplexed in a slot via frequency division multiplexing (FDM).

[0053] A time-domain feature of a PSSCH in NR-V2X can be at a range granularity. However, in contrast to a PSSCH in LTE-V2X, which occupies all time-domain symbols in a subframe, a PSSCH in Petition 870250084704, dated 09 / 19 / 2025, page 20 / 184 14 / 68 NR-V2X can occupy several symbols in a slot. This is mainly because, in an LTE system, uplink or downlink transmission is done at a subframe granularity. Therefore, sidelink transmission is also at a subframe granularity (a special subframe in a TDD system is not used for sidelink transmission). In an NR system, a flexible slot structure is used. Specifically, a slot includes both an uplink symbol and a downlink symbol, so that more flexible scheduling can be implemented and delay can be reduced.

[0054] Figure 3 is a schematic diagram of a slot structure in an NR system. Referring to Figure 3, a slot may include a downlink (DL) symbol, an uplink (UL) symbol, and a flexible symbol. The downlink symbol may be located at an initial position in the slot, the uplink symbol may be located at an final position in the slot, and the flexible symbol is located between the downlink symbol and the uplink symbol. Furthermore, the number of symbols in each slot is configurable.

[0055] Currently, an operator can be shared between a side-link transmission system and a cellular system. In this case, side-link transmission can only be performed using an uplink transmission resource of the cellular system. For NRV2X, if it is still necessary to occupy all symbols in the time domain within a slot for side-link transmission, a network is required to configure all the Petition 870250084704, dated 09 / 19 / 2025, page 21 / 184 15 / 68 uplink symbols in a slot for side-link transmission. This significantly impacts both uplink and downlink data transmission in the NR system, degrading system performance. Therefore, in NR-V2X, support is provided for using some time-domain symbols in a slot for side-link transmission; that is, some uplink symbols in a slot are used for side-link transmission. Additionally, an automatic gain control (AGC) symbol and a guard period (GP) symbol are included in side-link transmission. Considering this, if there is a relatively small number of uplink symbols that can be used for side-link transmission, fewer symbols remain available to transmit valid data after the AGC and GP symbols are removed, resulting in very low resource utilization.Therefore, at least seven symbols in the time domain (including one GP symbol) are occupied for side-link transmission in NR-V2X. When the side-link transmission system uses a dedicated carrier, there is no problem of sharing transmission resources with another system, and all symbols in the slot can be configured to be used for side-link transmission.

[0056] In NR-V2X, a starting point and duration of time-domain symbols used for side-link transmission in a slot can be configured using the parameters: a starting symbol location (slStartSymbol) and a number of symbols (sl-LengthSymbols). The last symbol among the symbols in the time domain used Petition 870250084704, dated 09 / 19 / 2025, page 22 / 184 16 / 68 for side link transmission is used as the GP guard period. Only symbols in time domains other than GP can be used for a PSSCH and a PSCCH. However, if a PSFCH transmission resource is configured in a slot, the PSSCH and PSCCH cannot occupy a time domain symbol used for PSFCH transmission, nor an AGC symbol and a GP symbol before the time domain symbol.

[0057] In an NR-V2X system, a time-domain resource in a resource pool is indicated by a bitmap. Considering a flexible slot structure in the NR system, the bitmap length is extended, and the bitmap length range is [10:160]. One way to determine, using a bitmap, the location of a slot belonging to a resource pool in a system frame number period (system frame number, SFN) in NR-V2X is similar to that of LTE-V2X, and the two methods differ from each other in the following two aspects.

[0058] First, a total quantity of „ , , 10240 x 2^ intervals included in an SFN period and , where a parameter F is related to a spacing value between subcarriers.

[0059] Secondly, if at least one symbol in the time domain in time domain symbols yy 4- iy 4- 7 y + X_1r TΤΛ j. indultoem umslot is not configured as an uplink symbol using TDDUL-DL-ConfigCommon signaling from the network device, the slot cannot be used for sidelink transmission. In this document, Y and X represent sl-StartSymbol and slLengthSymbols, respectively. Petition 870250084704, dated 09 / 19 / 2025, page 23 / 184 17 / 68

[0060] A method for determining the location of a slot belonging to a resource pool in a period SEN may include the following steps 1 through 5.

[0061] In step 1, a slot that does not belong to the resource pool in the SEN period is removed. The slot that does not belong to the resource pool may include a synchronization slot, a slot that cannot be used for side link transmission, and the like. The remaining slots are expressed as a set of remaining slots, and the remaining slots are (IO,!!, · · jfJQJ+OXjU.Hj NrôoU.-i)) renumbered as

[0062] In this context, denotes a number of synchronization slots within an SFN period, and the synchronization slot is determined based on configuration parameters related to synchronization, which are related to the transmission period of the synchronization signal block (synchronization signal block, SSB), the number of SSB transmission resources configured within the period, and the like.

[0063] ° denotes a number of intervals within a SEN period that do not conform to a starting point configuration and a number of uplink symbols. If at least one time-domain symbol in the time-domain symbols γ γ _L iy _i_ 2 Y + X_ 1 ' ' ' included in a slot is not semi-statically configured as an uplink symbol, the slot cannot be used for side-link transmission, where Y and X represent slStartSymbol and sl-LengthSymbol, respectively.

[0064] In stage 2, a number of slots Petition 870250084704, dated 09 / 19 / 2025, page 24 / 184 18 / 68 reserved and a corresponding location in the time domain are determined.

[0065] If a number of slots in the remaining slot set cannot be divided exactly by the length of a bitmap, a number of reserved slots and a corresponding location in the time domain need to be determined. In some implementations, if a slot ΓΓ(0 Ü ·' < 10240 x 2* — «a — NnSoU. ) J.· ^· Nrsenado od L. o Zi tD -LLd slot is a reserved slot. [00 66] Where, ^reserved — (10240x 2 — AfsS!S—) mod , e represents the number of reserved slots, ^bitmapm=°..... represents the bitmap length, and

[0067] In step 3, the reserved slots are removed from the remaining set of slots, to obtain a set called the logical slot set.

[0068] All slots in the slot set mentioned above are slots that can be used in a resource pool. The ranges in the logical range set are f^-SL ^SL· ^SL j renumbered as \ o ' i >···> Tmax-i^ where = 10240 X 2“ — AÇ— A^,

[0069] In step 4, based on the bitmap, a slot is determined that is in the logical slot set and that belongs to the resource pool.

[0070] A bitmap in the information of {b0,blr...,bL3 configuration of the resource set and - aitmap For Petition 870250084704, dated 09 / 19 / 2025, page 25 / 184 19 / 68 (O < it < (10240 x 2“- „a- -. 64«,™™ )} an interval in the set of logical intervals, when 1 jor is met, the interval is an interval belonging to the resource pool, where kf= kmodL·^^

[0071] In step 5, the range determined in step 4 and belonging to the resource pool is renumbered as ^fSL· T c Τ' _ 11 Τ' , where {0, 1, ..., e 1, e represents a number of ranges included in the resource pool. SECOND METHOD OF RESOURCE SELECTION IN NR SL:

[0072] The second resource selection mode can also be referred to as resource allocation mode 2. In resource allocation mode 2, an upper layer of an end device can request the end device's physical layer to determine a subset of resources. Then, the upper layer of the end device can select, from the subset of resources determined by the physical layer, a resource used for PSSCH / PSCCH transmission.

[0073] If the aforementioned resource selection process is expected to be triggered, the upper layer of the terminal device may provide, within a slot, the physical layer with the following parameters related to PSSCH / PSCCH transmission: a resource pool corresponding to the resource subset; a physical layer priority (a remaining packet delay budget, remaining PDB); and a quantity (^subCH) of subchannels used for PSSCH / PSCCH transmission in a Petition 870250084704, dated 09 / 19 / 2025, page 26 / 184 20 / 68 slot.

[0074] Optionally, the upper layer of the terminal device may also provide the physical layer with a resource reservation period (Γ^τ_τχ). The unit of the resource reservation period is usually milliseconds (ms).

[0075] The process of determining the resource subset can be affected by the following parameters configured by the upper layer: sl-SelectionWindowList, slThresPSSCH-RSRP-List, sl-RS-ForSensing, slResourceReservePeriodList, sl-SensingWindow, slTxPercentageList and sl-PreemptionEnable.

[0076] sl-SelectionWindowList in the previous parameters can be used to set a minimum value of Timin for different values ​​of . ^2min can be set to a value defined by sl-SelectionWindowList for Vriorx.

[0077] The sl-ThresPSSCH-RSRP list in the previous parameters can be used to configure a reference signal receiving power (RSRP) limit corresponding to each combination (Pt' Pi), where Pi denotes a priority indicated in the received SCIs, and Priorx

[0078] The sl-RS-ForSensing in the parameters mentioned above can be used to instruct the terminal device to perform feature exclusion based on a PSSCH-RSRP or PSCCH-RSRP measurement result.

[0079] sl-ResourceReservePeriodList in the parameters above can be used to indicate an available resource reservation period in the resource pool. Petition 870250084704, dated 09 / 19 / 2025, page 27 / 184 21 / 68

[0080] sl-SensingWindow in the previous parameters T can be used to indicate a starting point of a T resource listening window. o can be defined as a number of slots corresponding to sl-SensingWindow (in milliseconds).

[0081] sl-TxPercentageList in the mentioned y parameters can be used to set a proportion of the remaining resources obtained after deleting resources. By Pr^°rxr it can be set to sl-TxPercentageList (Pr^°rx) .

[0082] sl-PreemptionEnable in the above parameters can be used to indicate whether resource preemption is enabled within the resource pool, and a resource preemption priority value Hΐ”'θ in the case where resource preemption is enabled.

[0083] If the top layer of the device p The terminal provides a resource reservation period r'P_TX, p P * r^pjix can be converted into a quantity of r^P-TX logical slots.

[0084] As shown in Figure 4, a process for determining the subset of features by the physical layer of the terminal device may include step (1) through step (7) below.

[0085] In step (1), a single-slot candidate resource used for transmission can be defined as r çfSL subCH consecutive subchannels within a slot v. The subchannel indices are x+j, / —θ' ' '—. The terminal device assumes that any ^subCH consecutive subchannels within a Petition 870250084704, dated 09 / 19 / 2025, page 28 / 184 22 / 68 time range + + correspond to a single slot feature. T

[0086] 1 in the time range mentioned above may n < t < TT satisfy— 1—proc;Lf and a value of 1 may be determined by the terminal device implementation. When the subcarrier spacing is 15 kHz, 30 kHz, 60 kHz or 120 T kHz, the value of proc / 1 θ 3 slots, 5 slots, 9 slots or 17 slots.

[0087] If 2™» is less than the remaining packet delay budget of a data packet in the unit of 71£ TCT slots, 2™» — 2 — , and a value of 2 can be determined t by implementing the terminal device. Otherwise, 2 equals PDB. The PDB can be indicated by the upper layer of T terminal device. A set of values ​​for 2mtn can be {1, 5, 10, 20}^^ intervals, where = 0, 1, 2, 3 correspond to the cases where the subcarrier spacing is 15 kHz, 30 kHz, 60 kHz, and 120 kHz, respectively. The terminal device T can determine 2mtn from the set of values ​​based on a Priorx priority of the data to be transmitted by the terminal device.

[0088] A total quantity of single-slot candidate resources is

[0089] In step (2), a resource listening window is defined as slots within a range of [ « _ T VI _ T'SA Tz 0' Ρί'οε,ο)fonde for a definition of 0, and reference made to the previous description. When the spacing of T subcarrier and 15 kHz, 30 kHz, 60 kHz or 120 kHz,1proc,a Petition 870250084704, dated 09 / 19 / 2025, p. 29 / 184 23 / 68 corresponds to one slot, one slot, two slots, or four slots. The terminal device must listen to a slot that is within the resource listening window and that belongs to a side-link resource pool, unless the terminal device performs a transmit operation within a slot.

[0090] In step (3), the parameter is set to a valuel° set by sl-ThresPSSCH-RSRPList, where *—Pi +—0 * . w

[0091] In step (4), the set θ initialized for all single-slot candidate features.

[0092] In step (5), if the following conditions are met, the terminal device must delete a candidate p ç resource from .

[0093] Condition 1: The terminal device does not listen to a slot in step (2). p

[0094] Condition 2: For a number of logical slots corresponding to any resource reservation period allowed in a resource pool configured by slResourceReservePeriodList, Y=ηιιP .

[0095] In step (6), if the following conditions are met, the terminal device must delete a resource P Ç candidate ^y of .

[0096] Condition 1: The terminal device receives pSL in SCI 1-A format in slot m, where a Resource Reservation Period field (if any) and a Priority field indicate, respectively, and Pr^°R^.

[0097] Condition 2: The RSRP measured for ICS Petition 870250084704, dated 09 / 19 / 2025, p. 30 / 184 24 / 68 gone where p' rsvpRX from where in a range 1, 2 represents whether one overlaps with the other. Cftnel 1 If a quantity of logical slots rsvp_RX q slot rtence a um i unto received is greater than T / ι(ρΓίοΛΑ,ρΓΪοΓΛ).

[0098] Condition 3: When a reserved PSSCH resource indicated in a received SCI 1-A format overlaps with rsvp.ix, or a received rsvp.ix format includes a 'Resource Reservation Period' field, it is assumed that a reserved resource indicated in the SCI of the same .SL format is D d tx f In this case, converted Ιρ,π>ρ κλΙ r ft-fSL· fJSL f.fSL > f-SL — „β,ίΊ,l7 otherwise, n denotes the first , Ct-fSL· ífSL f.fSL > slot, after slot n, which belongs to V4· n 'L7. otherwise,—.1««1 denotes a value in milliseconds T r converted from 2. '««1 denotes a quantity of opportunities fj-fSL· ífSL f.fSL > PSSCH transmission slots to be selected. V4· n '*-7. denotes a set of logical slots included in the current resource pool.

[0099] In step (7), if the amount of single slot resources remaining in the set is less than ' ^total, the terminal device increases the value of by 3 dB and executes step (4).

[00100] The physical layer of the terminal device reports to a MAC layer. Petition 870250084704, dated 09 / 19 / 2025, page 31 / 184 25 / 68 POSITIONING BASED ON DOWNWARD LINKAGE

[00101] In downlink-based localization, the parameter configuration for a downlink positioning reference signal (downlink positioning reference signal, DL PRS) can include four levels from highest to lowest: positioning frequency layer (frequency layer), TRP layer, PRS feature set, and PRS feature. The parameter configuration for a DL PRS is described in detail below.

[00102] A network device can provide a terminal device with DL PRS configurations for four positioning frequency layers. The following DL PRS configuration parameters are provided in a parameter structure for each positioning frequency layer: a DL PRS subcarrier spacing; a DL PRS cyclic prefix length (cyclic prefix, CP); a DL PRS frequency domain resource bandwidth; a DL PRS frequency domain initial frequency position; a DL PRS frequency domain reference point Point A; and a DL PRS CombN interleaving size.

[00103] A resource bandwidth value in the frequency domain of the DL PRS can be a number of PRBs allocated to the DL PRS. In some cases, a minimum resource bandwidth value in the frequency domain of the DL PRS can be 24 PRBs, with a granularity of 4 PRBs. A maximum resource bandwidth value in the frequency domain of the DL PRS can be 272 PRBs.

[00104] The initial frequency position in the domain Petition 870250084704, dated 09 / 19 / 2025, page 32 / 184 26 / 68 of the DL PRS resource frequency is used to indicate an index number of an initial DL PRS PRB in the frequency domain resource allocation. An index number of a PRB is defined relative to the reference point in the frequency domain, Point A of the DL PRS.

[00105] The DL PRS configuration parameters mentioned above, corresponding to each positioning frequency layer, can be applied to all DL PRS features included in the positioning frequency layer. That is, in a positioning frequency layer, all DL PRSs from a plurality of different TRPs can use the same subcarrier spacing and CP length and the same interleaving size, be transmitted in the same frequency subband, and occupy the same bandwidth. Such a configuration can allow the terminal device to simultaneously receive and measure DL PRSs from a plurality of different TRPs on the same frequency.

[00106] In some scenarios, TRP layer parameters may include a parameter to uniquely identify and locate a TRP ID, such as a TRP physical cell ID, a TRP NR global cell identifier (NCGI), or an absolute radio frequency channel number (ARFCN) of the TRP. Typically, a maximum of two sets of DL PRS features can be configured in each TRP layer.

[00107] The configuration parameters of each DL PRS resource set can be applied to all DL PRS resources included in the DL PRS resource set. The configuration parameters of a DL PRS resource set include one or more of the following parameters: an ID identity. Petition 870250084704, dated 09 / 19 / 2025, page 33 / 184 27 / 68 of the DL PRS resource set (represented by nr-DL-PRSResourceSetlD”); a transmission period and slot offset of a DL PRS (represented by dl-PRS-Periodicity-andResourceSetSlotOffset); a repetition factor of a DL PRS resource (represented by dl-PRS-ResourceRepetitionFactor”); a time interval for repeated transmissions of a DL PRS resource (represented by dl-PRS-ResourceTimeGap); a DL PRS muting setting; and a number of OFDM symbols occupied by the DL PRS resource (represented by dl-PRS-NumSymbols).

[00108] The transmission period and slot offset of a DL PRS are used to indicate the time-domain transmission behavior of all DL PRS features in the DL PRS feature set. In some implementations, a minimum value for a configurable DL PRS transmission period is 4 milliseconds, and a maximum value for a configurable DL PRS transmission period is 10,240 milliseconds. Currently, DL PRS configuration supports flexible subcarrier spacings: including 15 kHz, 30 kHz, 60 kHz, and 120 kHz. In the case of different subcarrier spacings, the configurable DL PRS transmission period can have the same range of values. Figure 5 is a schematic diagram showing the resources for transmitting a DL PRS in the case where the trace size is 2 and the resource element (RE) offsets are 0 and 1, respectively.

[00109] A DL PRS resource replay factor is used to indicate the number of repeated transmissions of a DL PRS resource in each DL PRS transmission period. Currently, the repeated transmission of the same DL PRS resource Petition 870250084704, dated 09 / 19 / 2025, page 34 / 184 28 / 68 can be used by the terminal device to aggregate the DL PRS energy from a plurality of transmissions, which facilitates increasing the coverage distance of a DL PRS and improving positioning accuracy. In an FR2 system, repeated transmission of the DL PRS feature can also be used by the terminal device to perform receive beam scanning operations. The terminal device can use different receive beams to receive repeated transmissions of the same DL PRS feature, in order to find an ideal TRP transmission beam that matches the terminal device's receive beam. However, repeated transmission of the DL PRS feature increases the DL PRS transmission overhead. Currently, to control transmission overhead, the DL PRS feature repetition factor is defined as 1, 2, 4, 6, 8, 16, or 32 in the 3GPP NR R16 specification.

[00110] A time interval between repeated transmissions of the DL PRS resource is used to indicate the number of slots between two consecutive repeated transmissions of the same DL PRS resource.

[00111] The DL PRS muting setting is used to indicate that no DL PRS is transmitted on some allocated time-frequency resources. The muting setting can be understood as follows: a DL PRS is not transmitted on all allocated time-frequency resources, and is intentionally not transmitted on some designated time-frequency resources. The muting setting can prevent a conflict between a DL PRS and another signal (such as an SSB). Additionally, the muting setting can prevent interference between signals transmitted by different TRPs. For example, the setting Petition 870250084704, dated 09 / 19 / 2025, page 35 / 184 29 / 68 silencing can be used to instruct a TRP that is closer to the terminal device not to transmit a DL PRS and to instruct a TRP that is farther from the terminal device to transmit a DL PRS. In this way, the terminal device may not be interfered with by a TRP indicating silencing and receives a DL PRS from the more distant TRP.

[00112] The number of OFDM symbols occupied by the DL PRS resource is used to indicate the number of OFDM symbols allocated to a DL PRS resource in a slot.

[00113] Generally, the DL PRS configuration parameters included in the TRP layer parameters can be applied to all DL PRS resources in a resource set. DL PRS corresponds to the TRP layer. Therefore, within the DL PRS resources belonging to the same resource set. DL PRSs are transmitted within the same transmission period and repeatedly transmitted the same number of times, and DL PRSs occupy the same number of OFDM symbols.

[00114] In some implementations, for each DL PRS resource, the DL PRS configuration parameters may also include: a DL PRS resource identifier (ID) (represented by nr-DL-PRS-ResourceID); a DL PRS sequence ID (represented by dl-PRS-SequenceID); an initial offset of the resource unit in the frequency domain of a DL PRS (represented by dl-PRS-CombSizeNAndReOffset”); a DL PRS resource slot offset (represented by dl-PRS-ResourceSlotOffset); a DL PRS OFDM symbol offset (represented by dlPRS-ResourceSymbolOffset”); and DL PRS quasi-co-location (QCL) information (represented by dl-PRS-QCLInfo”). Petition 870250084704, dated 09 / 19 / 2025, page 36 / 184 30 / 68

[00115] The initial offset of the resource unit in the frequency domain of a DL PRS is used to indicate a frequency domain offset value of the resource unit used for resource mapping in the 1st allocated OFDM symbol of the DL PRS resource in a slot. Generally, based on this parameter and a relative offset value defined in TS 38.211, the terminal device can determine, for each OFDM symbol, a frequency domain offset value of the resource unit used for resource mapping in the respective OFDM symbol.

[00116] The DL PRS feature slot offset is used to indicate a slot offset relative to a set of DL PRS features. This parameter can be used to determine a slot position of a respective DL PRS feature.

[00117] The DL PRS OFDM symbol offset is used to indicate a time-frequency resource allocation position of a DL PRS resource in a slot. This parameter can be used to indicate an index number of an initial OFDM symbol in a slot.

[00118] DL PRS QCL information is used to indicate the QCL information of a DL PRS. SL-U

[00119] When sidelink transmission is carried out in unlicensed spectrum, the sidelink transmission must meet specific regulatory requirements, including a minimum occupied channel bandwidth (OCB) and a maximum power spectral density (PSD). For the OCB requirement, when a UE carries out the transmission of Petition 870250084704, dated 09 / 19 / 2025, page 37 / 184 31 / 68 data using this channel, the bandwidth of the occupied channel must not be less than 80% of the bandwidth of a channel. For the maximum power spectral density requirement, the UE transmission power per 1 MHz must not exceed 10 dBm. To meet OCB and PSD regulatory requirements, it is necessary to use an interleaved resource block (interleaved resource block, IRB) structure for sidelink transmission in unlicensed spectrum. An IRB includes N RBs that are discrete in the frequency domain, a total of M IRBs are included in a frequency band range, and the RBs included in the mth IRB are {m, M+m, 2M+m, 3M+m, ...}.

[00120] Figure 6 is a schematic structural block diagram of interlocking features. As shown in Figure 6, a system bandwidth includes 20 RBs, including 5 IRBs (i.e., M = 5), each IRB includes 4 RBs (i.e., N = 4), and any two adjacent RBs belonging to the same IRB have the same spacing in the frequency domain, i.e., 5 RBs. The boxed numbers in Figure 6 represent IRB indices.

[00121] In an SL-U system, if an IRB-based resource allocation granularity is used, channels such as PSCCH and PSSCH in the SL-U system are all based on an IRB structure. Figure 7 is an example diagram of a frame structure for an SL-U system, where the frame structure in Figure 7 shows that a slot includes only one PSCCH and one PSSCH and does not include PSFCH. As shown in Figure 7, a bandwidth includes 20 RBs, with 5 IRB resources being configured, i.e., M = 5, each IRB resource includes 4 RBs, and the numbers in the boxes represent the IRB indices. In Petition 870250084704, dated 09 / 19 / 2025, page 38 / 184 32 / 68 Figure 7 shows that the system configures the PSCCH to occupy one IRB resource and two OFDM symbols in the time domain. The PSSCH is at the granularity of a PSSCH. The first symbol in the slot is an AGC symbol, and the last symbol is a GP symbol. In Figure 7, PSSCH 1 occupies IRBs #0 and #1, and a corresponding PSCCH 1 occupies IRBs #0. A PSSCH 2 occupies IRBs #2, and a corresponding PSCCH 2 also occupies IRBs #2. It should be noted that, for simplicity, the resources occupied by the second-stage SCI and the resources occupied by a PSCCH DMRS and a DMRS of PSSCH are not shown in Figure 7.

[00122] In the unlicensed spectrum, the UE can perform listen before talk (LBT) before accessing a channel. LBT is performed with 20 MHz granularity in the frequency domain, and each 20 MHz can be referred to as an RB set. A carrier can include a plurality of RB sets, with a guard period between RB sets, as shown in Figure 8.

[00123] In unlicensed spectrum, an UE is required to perform the LBT first and then access a channel after the LBT is successful. However, the timing of when the UE completes the LBT is uncertain. In some implementations, if the UE is restricted to performing transmission only at one starting point of a slot, the UE may miss a transmission opportunity because it failed to complete the LBT before the starting point. Therefore, in SL-U, it is configured to add an additional transmission starting point within a slot, i.e., transmission is performed at a plurality of starting points. For example, an additional starting point could be the 3rd or 4th OFDM symbol in the slot. Petition 870250084704, dated 09 / 19 / 2025, page 39 / 184 33 / 68 POSITIONING BASED ON LATERAL LINK

[00124] In 3GPP R-17, 3GPP RAN studies lateral link-based positioning, for example, it studies “NR positioning enhancement” and “NR positioning use case scenarios and requirements in coverage, partial coverage, and out of coverage.” The study on “NR positioning use case scenarios and requirements in coverage, partial coverage, and out of coverage” focuses on V2X and public safety use cases. Additionally, some organizations (e.g., the 3GPP SA1 working group) formulate a “range-based service” requirement and establish a positioning accuracy requirement for IoT use in an out-of-coverage scenario. 3GPP is required to study and develop a lateral link-based positioning solution to support the use cases, scenarios, and requirements determined in these activities.

[00125] To improve positioning accuracy, especially for implementing UE positioning outside of cellular network coverage, 3GPP completed feasibility and performance research on a side-link positioning reference signal-based positioning technology in an earlier phase of R18. Subsequently, a side-link positioning-based solution (including range / direction measurement) in an NR system will be standardized. The side-link positioning-based solution mainly covers the following aspects of standardization.

[00126] Standardization work 1: Standardization of sidelink positioning reference signals (SL PRS). The SL PRS can Petition 870250084704, dated 09 / 19 / 2025, page 40 / 184 34 / 68 uses an interlacing-based structure (without excluding a full RE mapping mode) in the frequency domain and utilizes a sequence format based on a pseudo-random sequence. SL PRS can be designed based on an existing DL-PRS sequence and support an SL PRS bandwidth of up to 100 MHz in FR1.

[00127] Standardization work 2: standardization of a measurement quantity used for side link positioning. For example, the standardization is used to support measurement quantities for the SL RTT, SL-AOA and SL-TDOA positioning methods.

[00128] Standardization Work 3: Standardization of a resource allocation scheme for an SL PRS. For example, a resource allocation scheme for an SL PRS includes a resource allocation scheme 1 and a resource allocation scheme 2, where scheme 1 corresponds to the allocation of SL PRS resources performed by the network and scheme 2 corresponds to the selection of an SL PRS resource performed independently by the UE. In some implementations, the system supports a shared resource pool for both an SL PRS and side-link communication in Rel-16 / 17 / 18, as well as a dedicated resource pool for an SL PRS. In some implementations, for scheme 2, it is necessary to study and standardize one or more of the following: channel listening-based resource selection, random resource selection, congestion control, or UE coordination-based resource selection.

[00129] Standardization work 4: Standardization of an open-loop power control mechanism for Petition 870250084704, dated 09 / 19 / 2025, p. 41 / 184 35 / 68 SL PRS transmission, and similar.

[00130] As mentioned above, an SL PRS can be transmitted within a dedicated resource pool for the SL PRS or in a shared resource pool for the SL PRS and a side-link data channel (such as a PSSCH). In either the shared resource pool or the dedicated resource pool, how to specify a transmission resource and / or a transmission method for the SL PRS is a problem to be solved.

[00131] The modalities of this request are described in detail below by means of examples.

[00132] The provisions of this application may apply to licensed spectrum or may apply to unlicensed spectrum.

[00133] The SL PRS resource mentioned in the embodiments of this application may refer to a time-frequency resource that is used to transmit an SL PRS within a slot.

[00134] In some embodiments, an SL PRS resource may include one or more of the following features: an identity (ID) of the SL PRS resource, an interleaving size and an RE offset of an SL PRS transmitted within the SL PRS resource, an initial OFDM symbol of the SL PRS resource in a slot, and a number of consecutive OFDM symbols occupied by the SL PRS resource, or RBs occupied by the SL PRS resource within the OFDM symbols.

[00135] In some embodiments, the SL PRS resources in a resource set can be determined based on configuration information from a network device.

[00136] In some modalities, the SL PRS resources within a resource pool can be determined based Petition 870250084704, dated 09 / 19 / 2025, page 42 / 184 36 / 68 in pre-configuration information.

[00137] In some modes, the network device configuration information or pre-configuration information may indicate all the above characteristics of the SL PRS feature.

[00138] In some embodiments, the network device configuration or pre-configuration information may indicate some of the aforementioned characteristics of the SL PRS resource. For example, the network device configuration or pre-configuration information may indicate an SL PRS resource ID, an interleaving size and RE offset of an SL PRS transmitted within the SL PRS resource, as well as an initial OFDM symbol of the SL PRS resource within a slot and a number of consecutive OFDM symbols occupied by the SL PRS resource, without explicitly indicating the RBs occupied by the SL PRS resource. In this case, the RBs occupied by the SL PRS resource may be the same as the RBs configured in the resource pool.

[00139] Figure 9 is a schematic flowchart of a side-link transmission method according to one embodiment of this application. With reference to Figure 9, in step S910, a terminal device transmits or receives, within a first resource pool, a first SL PRS. The first resource pool may be a resource pool dedicated to an SL PRS or it may be a resource pool shared for both an SL PRS and a side-link data channel (such as a PSSCH). OPTION 1: THE FIRST RESOURCE POOL IS A RESOURCE POOL DEDICATED TO A PRS SL

[00140] In some modalities, one or more Petition 870250084704, dated 09 / 19 / 2025, page 43 / 184 37 / 68 PSCCH resources can be configured / pre-configured in a slot in the dedicated resource pool for SL PRS.

[00141] In some modes, one or more SL PRS resources can be configured / pre-configured within a slot in the resource pool dedicated to SL PRS.

[00142] In some embodiments, the SCI carried by a PSCCH transmitted on a PSCCH resource within a slot is used to schedule an SL PRS resource associated with the PSCCH resource within the slot. In other words, the SCI are used to schedule an SL PRS transmitted on an SL PRS resource associated with the PSCCH resource within the slot.

[00143] In some embodiments, a slot may include one or more groups of OFDM symbols (ofDM symbol set). A group of OFDM symbols may include a plurality of consecutive OFDM symbols in a slot. A group of OFDM symbols may include one or more SL PRS features. For example, a group of OFDM symbols may include an SL PRS feature. As another example, a group of OFDM symbols may include a plurality of PRS features located at different positions in the frequency domain.

[00144] In some modes, the SL PRS resource IDs within a slot in the first resource pool may be consecutive.

[00145] In some modes, the IDs of SL PRS resources within a group of OFDM symbols may be consecutive.

[00146] In some modes, there may be a one-to-one mapping relationship between a PSCCH resource and an SL PRS resource in the first resource pool.

[00147] In some modalities, there may be a Petition 870250084704, dated 09 / 19 / 2025, page 44 / 184 38 / 68 one-to-many mapping relationship between a PSCCH resource and an SL PRS resource in the first resource pool.

[00148] In some modes, there may be a many-to-one mapping relationship between a PSCCH resource and an SL PRS resource in the first resource pool. MODE 1.1: THERE IS A ONE-TO-ONE MAPPING RELATIONSHIP BETWEEN A PSCCH RESOURCE AND AN SL PRS RESOURCE IN THE FIRST RESOURCE POOL.

[00149] In some modes, a PSCCH resource within a slot in the first resource pool and an SL PRS resource within the slot correspond to an ID, and a PSCCH resource and an SL PRS resource that are associated with each other are associated with the same ID.

[00150] In some modes, an SL PRS resource to which no PSCCH resource is mapped cannot be used.

[00151] In some modes, a range of values ​​for a PSCCH resource ID in the first resource pool is the same as a range of values ​​for an SL PRS resource ID in the first resource pool.

[00152] For example, referring to Figure 10, four PSCCH features are configured in one slot, and the IDs of the four PSCCH features are #0 to #3, respectively. Three groups of OFDM symbols are additionally configured within the slot, and the three groups of OFDM symbols correspond to OFDM symbols 4 to 6, OFDM symbols 8 to 9, and OFDM symbols 11 to 12, respectively. Two SL PRS features with different RE offsets are configured within the 1st group of OFDM symbols, and one SL PRS feature is configured in each of the other two groups of OFDM symbols, i.e., there are a total of four SL PRS features. The IDs of the four SL PRS features Petition 870250084704, dated 09 / 19 / 2025, page 45 / 184 39 / 68 are #0 to #3, respectively. In the example shown in Figure 10, a PSCCH #0 resource is associated with an SL PRS #0 resource, a PSCCH #1 resource is associated with an SL PRS #1 resource, a PSCCH #2 resource is associated with an SL PRS #2 resource, and a PSCCH #3 resource is associated with an SL PRS #3 resource. MODALITY 1.2: A PSCCH RESOURCE IN THE FIRST RESOURCE POOL IS ASSOCIATED WITH ONE OR MORE SL PRS RESOURCES.

[00153] In some modes, a PSCCH resource and an SL PRS resource within a slot in the first resource pool may correspond to an ID, and a range of values ​​corresponding to an ID of a PSCCH resource within a slot in the first resource pool may be different from a range of values ​​corresponding to an ID of an SL PRS resource within the slot.

[00154] In some embodiments, a first SL PRS is carried on a first SL PRS resource within a first slot, and the first slot further includes a first PSCCH resource associated with the first SL PRS resource. ICS are carried on the first PSCCH resource, and ICS are used to schedule the first SL PRS resource (or to schedule an SL PRS on the first SL PRS resource).

[00155] In some embodiments, ICS may include a first bit field. The first bit field may be used to indicate the first SL PRS resource. For example, a decimal value represented by the first bit field may represent an ID of an SL PRS resource associated with a scheduled PSCCH using the ICS.

[00156] In some embodiments, a number of bits in the first bit field can be associated with a first quantity. The first quantity can be Petition 870250084704, dated 09 / 19 / 2025, p. 46 / 184 40 / 68 determined based on a quantity of SL PRS resources associated with the first PSCCH resource. For example, the first quantity may be equal to the quantity of SL PRS resources associated with the first PSCCH resource. For example, the quantity of SL PRS resources associated with the first PSCCH resource is D, and the SL PRS resource indices are 0, 1, ..., and D1, respectively.

[00157] In some embodiments, a number of bits in the first bit field can be determined based on where denotes a ceiling operation, D indicates that the number of SL PRS features associated with the first PSCCH feature is D, and the indices of the D SL PRS features can be 0, 1, . . ., and Dl, respectively. In one example, the number of bits in the first bit field can be equal to .

[00158] For example, referring to Figure 11, assume that the first PSCCH resource is PSCCH resource #0 in Figure 11. It can be seen in Figure 11 that PSCCH resource #0 is associated with two SL PRS resources, namely SL PRS resource #0 and SL PRS resource #1. The number of bits in the first bit field in the transmitted SCI in PSCCH resource #0 can be 1. If a bit value is 0, this indicates that an SL PRS resource indicated by the first bit field is SL PRS resource #0. If a bit value is 1, this indicates that an SL PRS resource indicated by the first bit field is SL PRS resource #1.

[00159] In some modes, the SL PRS resource IDs within the same OFDM symbol group are consecutive (i.e., numbered consecutively).

[00160] In some modalities, in a resource selection process (corresponding to the second selection mode) Petition 870250084704, dated 09 / 19 / 2025, page 47 / 184 41 / 68 of resources), the terminal device first selects a target SL PRS resource and then selects a PSCCH resource associated with the target SL PRS resource.

[00161] In some embodiments, in a process in which the terminal device performs resource selection, if an SL PRS resource in a plurality of SL PRS resources associated with the same PSCCH resource is deleted (for example, it is deleted because that SL PRS resource is occupied by another terminal device), the terminal device deletes other SL PRS resources in the plurality of SL PRS resources.

[00162] In some embodiments, the terminal device first selects a PSCCH resource. Then, the terminal device can select a target SL PRS resource (used to transmit an SL PRS) from one or more SL PRS resources associated with the PSCCH resource. In one example, the terminal device can randomly select an SL PRS resource, as a target SL PRS resource, from one or more SL PRS resources associated with the PSCCH resource. MODALITY 1.2.1: A QUANTITY OF PSCCH RESOURCES WITHIN A SLOT IN THE FIRST RESOURCE POOL IS GREATER THAN OR EQUAL TO A QUANTITY OF OFDM SYMBOL GROUPS WITHIN THE SLOT.

[00163] In some embodiments, each SL PRS resource can be uniquely associated with one PSCCH resource. Additionally, in some embodiments, an ID of a PSCCH resource associated with each SL PRS resource can be indicated by configuration information or pre-configuration information of a network device. To avoid collisions between PSCCHs corresponding to time-division multiplexed SL PRS resources, the PSCCH resources associated with SL PRS resources in different OFDM symbols can be different. Petition 870250084704, dated 09 / 19 / 2025, page 48 / 184 42 / 68

[00164] In some embodiments, each PSCCH resource is associated with one or more SL PRS resources. For example, the first resource pool may include a first PSCCH resource, and the first PSCCH resource is associated with a plurality of SL PRS resources. In other words, there is a one-to-many association relationship between a PSCCH resource and an SL PRS resource in the first resource pool.

[00165] In some embodiments, each PSCCH resource in the first resource pool is associated with one or more SL PRS resources within an OFDM symbol group.

[00166] In some modes, each PSCCH resource in the first resource pool is associated with one or more SL PRS resources in at most one OFDM symbol group.

[00167] For example, referring to Figure 12, three PSCCH features are configured in one slot, and the IDs of the three PSCCH features are #0 to #2, respectively. Three additional OFDM symbol groups are configured within the slot, and the three OFDM symbol groups correspond to OFDM symbols 4 to 6, OFDM symbols 8 to 9, and OFDM symbols 11 to 12, respectively. Two SL PRS features with different RE offsets are configured within the 1st OFDM symbol group, and one SL PRS feature is configured in each of the other two OFDM symbol groups, i.e., there are a total of four SL PRS features. The IDs of the four SL PRS features are #0 to #3, respectively. In the example shown in Figure 12, a PSCCH #0 resource is associated with an SL PRS #0 resource and an SL PRS #1 resource, a PSCCH #1 resource is associated with an SL PRS #2 resource, and a PSCCH #2 resource is associated with an SL PRS #3 resource. MODALITY 1.2.2: A QUANTITY OF PSCCH RESOURCES Petition 870250084704, dated 09 / 19 / 2025, page 49 / 184 43 / 68 Within a slot in the first resource pool is equal to a quantity of OFDM symbol groups within the slot.

[00168] In some embodiments, each PSCCH resource within a slot in the first resource pool is associated with a group of OFDM symbols within the slot. In other words, each group of OFDM symbols can be uniquely associated with a PSCCH resource. Similarly, each PSCCH resource can be uniquely associated with a group of OFDM symbols.

[00169] For example, referring to Figure 11, three PSCCH features are configured in one slot, and the IDs of the three PSCCH features are #0 to #2, respectively. Three groups of OFDM symbols are additionally configured within the slot, and the three groups of OFDM symbols correspond to OFDM symbols 4 to 6, OFDM symbols 8 to 9, and OFDM symbols 11 to 12, respectively. Two SL PRS features with different RE offsets are configured in each of the 1st OFDM symbol group, 2nd OFDM symbol group, and 3rd OFDM symbol group, i.e., there are a total of six SL PRS features. The IDs of the six SL PRS features are #0 to #5, respectively. In the example shown in Figure 11, a PSCCH #0 feature is associated with the 1st group of OFDM symbols, a PSCCH #1 feature is associated with the 2nd group of OFDM symbols, and a PSCCH #2 feature is associated with the 3rd group of OFDM symbols. MODE 1.3: THE FIRST RESOURCE POOL INCLUDES A SECOND SL PRS RESOURCE, AND THE SECOND SL PRS RESOURCE IS ASSOCIATED WITH ONE OR MORE PSCCH RESOURCES.

[00170] In some embodiments, in a resource selection process (corresponding to the second resource selection mode), the terminal device may first select the second SL PRS resource and then select a resource Petition 870250084704, dated 09 / 19 / 2025, page 50 / 184 44 / 68 The target PSCCH resource is one or more PSCCH resources associated with the second SL PRS resource. For example, the terminal device can randomly select an SL PRS resource as the target PSCCH resource from one or more PSCCH resources associated with the second SL PRS resource.

[00171] In some embodiments, if the first resource selection mode (i.e., based on a resource selection mode scheduled by the network device) is used, the network device may indicate a scheduled SL PRS resource and a PSCCH resource associated with the SL PRS resource.

[00172] With reference to Mode 1.1 to Mode 1.3, the preceding describes in detail an association relationship between an SL PRS resource and a PSCCH resource using examples. The SCI carried in a PSCCH transmitted on a PSCCH resource can be used to schedule an SL PRS transmitted on an SL PRS resource associated with the PSCCH resource and located in the same slot as the PSCCH resource. Furthermore, in some modes, the SCI may also indicate one or more SL PRS resources located in different slots, and one or more SL PRS resources located in different slots may be used for retransmission of the SL PRS within the slot, i.e., one or more SL PRS resources located in different slots serve as a retransmission resource for the SL PRS within the slot. It should be understood that a form of indication of a relay resource described below can be applied to any mode (e.g., Mode 1.1, Mode 1.2, or Mode 1.3) in Mode 1.

[00173] In some embodiments, the first SL PRS may be carried in the first SL PRS resource within the first slot. The first slot may also include a first Petition 870250084704, dated 09 / 19 / 2025, page 51 / 184 45 / 68 PSCCH resource associated with the first SL PRS resource. SCIs are carried on the first PSCCH resource, and SCIs can be used to schedule the first SL PRS resource. SCIs include a second bit field, and the second bit field can be used to indicate a third SL PRS resource (the second bit field can indicate an SL PRS resource, or it can indicate a plurality of SL PRS resources; and if the second bit field indicates a plurality of SL PRS resources, the third SL PRS resource can be any one of the plurality of SL PRS resources). A slot in which the third SL PRS resource is located is a second slot (a slot different from the first slot), and the third SL PRS resource is a retransmission resource of the first SL PRS (or the third SL PRS resource is used to retransmit the first SL PRS).

[00174] The third SL PRS feature can be indicated in several ways by the SCI based on the second bit field. Three possible implementations are provided below. METHOD 1:

[00175] The third SL PRS resource is associated with the same ID as the first SL PRS resource. That is, the same SL PRS (SL PRSs that are initially transmitted and retransmitted can be considered as the same SL PRS) can occupy SL PRS resources with the same ID in different slots.

[00176] In some embodiments, the second bit field may indicate only a slot within which a retransmission feature of the first SL PRS is located. This form of indication can greatly reduce the number of bits in the SCI. METHOD 2:

[00177] The first SL PRS resource and the third Petition 870250084704, dated 09 / 19 / 2025, page 52 / 184 46 / 68 SL PRS features correspond to a first group of OFDM symbols within a slot. For example, the first SL PRS feature and the third SL PRS feature may correspond to features with different RE offsets within the first group of OFDM symbols.

[00178] In some embodiments, the second bit field can be used to indicate a second slot (i.e., a slot within which the third SL PRS feature is located) and a first offset value (or referred to as the ID offset value). The first offset value can be used to determine an ID of the third SL PRS feature. For example, the first offset value could be an offset value of the ID of the third SL PRS feature relative to a Target ID.

[00179] The target ID can be an ID of an SL resource. PRS within the first group of OFDM symbols. For example, the target ID could be a minimum value of SL PRS resource IDs within the first group of OFDM symbols. As another example, the target ID could be a maximum value of SL PRS resource IDs within the first group of OFDM symbols.

[00180] In some embodiments, the second bit field may include a third bit field. The third bit field may be used to carry the first offset value mentioned above. To avoid blind detection of a PSCCH, a number of bits in the third bit field may be associated with a maximum number of SL PRS features included in a group of OFDM symbols within a slot in the first feature pool.

[00181] In some forms, the number of bits in the third bit field can be determined based on Petition 870250084704, dated 09 / 19 / 2025, p. 53 / 184 47 / 68 fi X [logzÁ] where denotes a ceiling operation, denotes the maximum number of SL PRS resources included in a group of OFDM symbols within a slot in the first resource pool, pe denotes a number of retransmission resources indicated by the SCI (or a number of SL PRSs from different slots that are indicated by the SCI). For example, the number of bits in the third bit field may be equal to .

[00182] For example, in Figure 10, assuming that the first SL PRS feature is SL PRS feature #0 in Figure 10, and SL PRS feature #0 is located in the 1st group of OFDM symbols (including OFDM symbols 4 to 6) among the three groups of OFDM symbols, only one feature within the 1st group of OFDM symbols, namely SL PRS feature #0 or SL PRS feature #1, can serve as the third SL PRS feature. Furthermore, in the example shown in Figure 10, a maximum quantity A of SL PRS features included in a group of OFDM symbols within a slot is 2. If a quantity of SL PRS features from different slots indicated by the SCI is 2, the third bit field will include 2 X [iopa2j — 2 . The first bit corresponds to an ID offset value of the 1st PRS SL resource indicated by the SCI, and the second bit corresponds to an ID offset value of the 2nd PRS SL resource indicated by the SCI.For either bit, if a bit value is 0, this indicates that an SL PRS resource ID indicated by the bit is #0. If a bit value is 1, this indicates that an SL PRS resource ID indicated by the bit is #1.

[00183] In some modes, the SL PRS resource IDs within the same OFDM symbol group are consecutive. Petition 870250084704, dated 09 / 19 / 2025, page 54 / 184 48 / 68

[00184] Compared with Method 1, the terminal device can select an SL PRS feature more flexibly in Method 2. In addition, Method 2 can reduce, to some extent, the number of bits used for feature indication. METHOD 3:

[00185] The third SL PRS resource can be any SL PRS resource within a slot. That is, the same SL PRS can occupy different SL PRS resources for retransmission. For example, the same SL PRS can occupy SL PRS resources within the same OFDM symbol group or different OFDM symbol groups for retransmission.

[00186] In some embodiments, the second bit field is used to indicate one or more of the following: a second slot; or an ID of the third SL PRS feature.

[00187] In some embodiments, the second bit field may include a fourth bit field. The fourth bit field may be used to carry an ID of a fourth SL PRS resource, and a number of bits in the fourth bit field may be associated with a number of SL PRS resources within a slot in the first resource pool.

[00188] In some embodiments, the number of bits in the fourth bit field can be determined based on fix where denotes a ceiling operation, denotes a number of retransmission resources indicated by the SCIs (or a number of SL PRS resources from different slots and indicated by the SCIs), and denotes a number of SL PRS resources within a slot in the first resource pool. For example, the number of bits in the fourth bit field can Petition 870250084704, dated 09 / 19 / 2025, p. 55 / 184 49 / 68 equals . a decimal value corresponding to each bit in the bits field can represent a value of an ID of an SL PRS resource corresponding to the decimal value.

[00189] For example, in Figure 10, a total of four SL PRS resources are configured / pre-configured in a slot, i.e., . The third SL PRS resource mentioned above can be any of the four SL PRS resources. If the number of SL PRS resources from different slots indicated by the SCI is 2, the fourth bit field in the SCI includes 2 x [ío£f22] — 4 bits. The first two bits in the four bits can correspond to an ID of the 1st SL PRS resource indicated by the SCI, and the last two bits in the four bits correspond to an ID of the 2nd SL PRS resource indicated by the SCI.

[00190] In some modes, consecutive indexes starting from 0 can be assigned to SL PRS resource IDs in a slot.

[00191] One advantage of Method 3 is that the terminal device is allowed to select an SL PRS resource from all SL PRS resources, thus improving the quality of a selected SL PRS resource. MODE 2: THE FIRST RESOURCE POOL IS A POOL From shared resources to an SL PRS and a side link data channel (such as a PSSCH)

[00192] In some embodiments, the first SL PRS is located on a first SL PRS resource, and the first SL PRS resource is scheduled or indicated based on second-stage SCIs. In other words, in the shared resource pool, a scheduled SL PRS resource and / or a transmission method for an SL PRS can be indicated by second-stage SCIs. Petition 870250084704, dated 09 / 19 / 2025, page 56 / 184 50 / 68 stage.

[00193] In some embodiments, the first SL PRS may be located in the first slot, and the second-stage SCI of the first slot may indicate an SL PRS resource in another slot (for example, a relay resource of the first SL PRS), or it may not indicate an SL PRS resource in another slot.

[00194] The first SL PRS resource can be indicated by the second-stage SCI in several ways. Two possible ways of indicating it are given below with reference to Mode 2.1 and Mode 2.2. MODALITY 2.1: SECOND-STAGE SCI INDICATES AN ID OF THE FIRST RESOURCE SL PRS.

[00195] In some embodiments, a terminal device transmitting the first SL PRS and a terminal device receiving the first SL PRS can exchange SL PRS resource configuration information via sidelink positioning protocol (SLPP) layer signaling or determine SL PRS resource configuration information based on the configuration / pre-configuration information of a resource pool. SL PRS resource configuration information can be used to configure the first SL PRS resource. SL PRS resource configuration information may include, for example, one or more of the following: an SL PRS resource ID, an interleaving size and RE offset of an SL PRS transmitted within the SL PRS resource, or an initial OFDM symbol of the SL PRS resource within a slot and a number of consecutive OFDM symbols occupied by the SL PRS resource. Through the previous configuration, each ID can Petition 870250084704, dated 09 / 19 / 2025, p. 57 / 184 51 / 68 correspond to (or correspond exclusively to) an SL PRS resource.

[00196] In mode 2.1, second-stage SCIs can indicate an ID of a scheduled first SL PRS resource, thereby reducing the overhead of indication signaling in second-stage SCIs.

[00197] In some embodiments, the bit field in the second-stage SCIs used to indicate the ID of the first SL PRS resource may include + or R bits, where + denotes a ceiling operation and R denotes a maximum value of an SL PRS resource configured in the SL PRS resource configuration information. If ^^2(^ + 1 bits are used, an additional value is used to indicate that no SL PRS is transmitted. If the terminal device transmitting the first SL PRS and the terminal device receiving the first SL PRS exchange SL PRS resource configuration information using SLPP layer signaling, a value for R may be set to a pattern. For example, a value for R may be set to 15 or another value.If the SL PRS resource configuration information is determined based on the resource pool configuration / pre-configuration information, an R value can be determined based on the resource pool configuration / pre-configuration information. MODALITY 2.2: THE SECOND-STAGE SCI INDICATES ONE OR MORE OF THE FOLLOWING: AN OFDM SYMBOL OCCUPIED BY THE FIRST SL PRS FEATURE, AN INTERLACE SIZE CORRESPONDING TO THE FIRST SL PRS, OR AN OFFSET CORRESPONDING TO THE FIRST SL PRS. Petition 870250084704, dated 09 / 19 / 2025, page 58 / 184 52 / 68

[00198] The OFDM symbol occupied by the first SL PRS feature can be indicated in several ways. Two possible ways of indicating it are given below. METHOD 1:

[00199] Second-stage SCIs may include a fifth bit field. The fifth bit field may be used to indicate a quantity N of OFDM symbols occupied by the first SL PRS resource. A quantity of bits in the fifth bit field may be 4, 10, or . m may denote a quantity of consecutive OFDM symbols (e.g., an average quantity of OFDM symbols or a maximum quantity of OFDM symbols) within a slot that are available for side-link transmission, except for OFDM symbols for a PSSCH DMRS, a PSCCH, and a PSFCH, where M > N.

[00200] In some embodiments, the N symbols occupied by the first SL PRS resource may be the last N consecutive OFDM symbols within the slot that are available for side link transmission, except for the OFDM symbols for a PSSCH DMRS, a PSCCH and a PSFCH. METHOD 2:

[00201] Second-stage SCIs include a sixth bit field. The sixth bit field can be used to indicate a starting point and the number of OFDM symbols occupied by the first SL PRS resource. The information carried in the sixth bit field can be called the resource indication value (RIV).

[00202] In some modes, a number of bits in the sixth bit field is determined based on E .MCM+DJ log,(—---) I -2, where M denotes a quantity of OFDM symbols. Petition 870250084704, dated 09 / 19 / 2025, page 59 / 184 53 / 68 consecutive (e.g., an average number of OFDM symbols or a maximum number of OFDM symbols) within a slot that are available for side-link transmission, excluding OFDM symbols for a DMRS PSSCH, a PSCCH, and a PSFCH, or M = 10. In one example, the number of bits in the sixth bit field is equal to । ।.

[00203] For example, the sixth bit field carries an RIV. The RIV can be expressed as: ^711 = 71^^ + 2^=^(^+1-1) in ie ί·Γ , where denotes a spacing between the 1st OFDM symbol occupied by the first SL PRS resource and the 1st OFDM symbol among the M OFDM symbols, and N denotes a quantity of OFDM symbols occupied by the scheduled SL PRS resource.

[00204] Compared with mode 2.1, mode 2.2 can reduce the overall expenses of indication signage in the SLPP layer signage.

[00205] An ID of a resource mentioned in any of the previous modalities may refer to or be replaced by an ID associated with the resource. For example, an ID of an SL PRS resource may refer to an ID associated with the SL PRS resource. As another example, an ID of a PSCCH resource may refer to an ID associated with the PSCCH resource.

[00206] In some of the previous modalities, a retransmission resource of an SL PRS is indicated by the SCI, and the retransmission resource may refer to a retransmission resource within the same period. That is, the ICS indicate only retransmission resources within the same period.

[00207] The method modalities of this request are described above in detail with reference to Figure 1 to Petition 870250084704, dated 09 / 19 / 2025, p. 60 / 184 54 / 68 Figure 12. The apparatus embodiments of this application are described below in detail with reference to Figure 13 and Figure 14. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments and, therefore, for parts not described in detail in this document, reference may be made to previous embodiments of the method.

[00208] Figure 13 is a schematic structural diagram of a terminal device according to an embodiment of this application. The terminal device 1300 shown in Figure 13 includes a communications module 1310. The communications module 1310 is configured to transmit or receive, within a first resource pool, a first side-link positioning reference signal, where the first resource pool is one of the following: a resource pool dedicated to a side-link positioning reference signal; or a resource pool shared for a side-link positioning reference signal and a side-link data channel.

[00209] In some modes, the first set of resources is the dedicated set of resources.

[00210] In some embodiments, there is a one-to-one mapping relationship between a PSCCH resource of the physical side link control channel and a side link positioning reference signal resource in the first resource pool.

[00211] In some embodiments, a PSCCH resource and a side link positioning reference signal resource within a slot are associated with the same identifier. Petition 870250084704, dated 09 / 19 / 2025, page 61 / 184 55 / 68

[00212] In some embodiments, a PSCCH resource in the first resource pool is associated with one or more side-link positioning reference signal resources in the first resource pool.

[00213] In some embodiments, each PSCCH resource in the first resource pool is associated with one or more side-link positioning reference signal resources within a group of orthogonal frequency-division multiplexing OFDM symbols in the first resource pool.

[00214] In some embodiments, a range of values ​​corresponding to an identifier of a PSCCH resource within a slot is different from a range of values ​​corresponding to an identifier of a side link positioning reference signal within the slot.

[00215] In some modes, each PSCCH resource within a slot is associated with a group of OFDM symbols within the slot.

[00216] In some modes, the number of PSCCH resources within a slot is greater than or equal to the number of OFDM symbol groups within the slot.

[00217] In some embodiments, the first side-link positioning reference signal is carried in a first side-link positioning reference signal resource within a first slot; the first slot further includes a first PSCCH resource associated with the first side-link positioning reference signal resource; side-link control information (SCI) is carried in the first PSCCH resource; the SCI includes a first bit field; the first field of Petition 870250084704, dated 09 / 19 / 2025, page 62 / 184 56 / 68 bits is used to indicate the first side-link positioning reference signal feature; a number of bits in the first bit field is associated with a first quantity; and the first quantity is determined based on a number of side-link positioning reference signal features associated with the first PSCCH feature.

[00218] In some modes, the number of bits in the first bit field is determined based on , where denotes a ceiling operation and D denotes the first quantity.

[00219] In some embodiments, the terminal device also includes: a first selection module, configured to first select a target side link positioning reference signal resource and then select a PSCCH resource associated with the target side link positioning reference signal resource in a resource selection process.

[00220] In some embodiments, the first resource pool includes a second side-link positioning reference signal resource, and the second side-link positioning reference signal resource is associated with one or more PSCCH resources.

[00221] In some embodiments, the terminal device also includes: a second selection module, configured to first select the second side-link positioning reference signal resource and then select a target PSCCH resource from among one or more PSCCH resources associated with the second side-link positioning reference signal resource in a process. Petition 870250084704, dated 09 / 19 / 2025, page 63 / 184 57 / 68 resource selection.

[00222] In some embodiments, the destination PSCCH resource is randomly selected from one or more PSCCH resources associated with the second side link positioning reference signal resource.

[00223] In some embodiments, the first side-link positioning reference signal is carried in a first side-link positioning reference signal resource within a first slot; the first slot further includes a first PSCCH resource associated with the first side-link positioning reference signal resource; the SCIs are carried in the first PSCCH resource, the SCIs are used to schedule the first side-link positioning reference signal resource, and the SCIs include a second bit field; the second bit field is used to indicate a third side-link positioning reference signal resource; a slot in which the third side-link positioning reference signal resource is located is a second slot;and the third side-link positioning reference signal resource serves as a retransmission resource for the first side-link positioning reference signal.

[00224] In some embodiments, the third side link positioning reference signal feature and the first side link positioning reference signal feature are associated with the same identifier.

[00225] In some embodiments, the second bit field is used only to indicate a slot within which a retransmission feature of the first reference signal is located. Petition 870250084704, dated 09 / 19 / 2025, page 64 / 184 58 / 68 side link positioning is located.

[00226] In some embodiments, both the first side-link positioning reference signal feature and the third side-link positioning reference signal feature correspond to a first group of OFDM symbols within a slot.

[00227] In some embodiments, the first side-link positioning reference signal feature and the third side-link positioning reference signal feature correspond to different features within the first group of OFDM symbols.

[00228] In some embodiments, the second bit field is used to indicate one or more of the following: the second slot; or a first offset value, where the first offset value is used to determine an identifier of the third side link positioning reference signal feature.

[00229] In some embodiments, the first offset value is an offset value of the identifier of the third side-link positioning reference signal resource relative to a target identifier, and the target identifier is a minimal identifier of a side-link positioning reference signal resource within the first group of OFDM symbols.

[00230] In some embodiments, the second bit field includes a third bit field, the third bit field is used to carry the first offset value, and a number of bits in the third bit field is associated with a maximum number of side-link positioning reference signal resources included in a Petition 870250084704, dated 09 / 19 / 2025, p. 65 / 184 59 / 68 group of OFDM symbols within a slot in the first resource pool.

[00231] In some embodiments, a number of bits in the third bit field is determined based on X, where F1 denotes a ceiling operation, denotes the maximum number of side-link positioning reference signal resources included in a group of OFDM symbols within a slot in the first resource pool p and denotes a quantity of relay resources indicated by the SCI.

[00232] In some embodiments, the third side-link positioning reference signal feature is any of the side-link positioning reference signal features within a slot.

[00233] In some embodiments, the second bit field is used to indicate one or more of the following: the second slot; or an identifier of the third side link positioning reference signal resource.

[00234] In some embodiments, the second bit field includes a fourth bit field, the fourth bit field is used to carry an identifier of the fourth side-link positioning reference signal resource, and a number of bits in the fourth bit field is associated with a number of side-link positioning reference signal resources within a slot in the first resource pool.

[00235] In some embodiments, the number of bits in the fourth bit field is determined based on Γ.Ί p , where 1 denotes a ceiling operation, denotes a quantity Petition 870250084704, dated 09 / 19 / 2025, page 66 / 184 60 / 68 r· of retransmission resources indicated by the SCI and denotes a quantity of side link positioning reference signal resources within a slot.

[00236] In some embodiments, the identifiers of side-link positioning reference signal resources within a group of OFDM symbols are consecutive.

[00237] In some embodiments, the identifications of side link positioning reference signal resources in a slot are consecutive.

[00238] In some modes, the first set of resources is the shared set of resources.

[00239] In some embodiments, the first side link positioning reference signal is carried in the first side link positioning reference signal feature, and the first side link positioning reference signal feature is programmed based on the second stage SCIs.

[00240] In some embodiments, second-stage SCIs indicate an identifier of the first side-link positioning reference signal resource.

[00241] In some embodiments, second-stage ICS indicate one or more of the following: an OFDM symbol occupied by the first side-link positioning reference signal feature; an interlace size corresponding to the first side-link positioning reference signal; or a feature element (RE) offset corresponding to the first side-link positioning reference signal.

[00242] In some embodiments, second-stage SCIs include a fifth-bit field, the fifth-bit field Petition 870250084704, dated 09 / 19 / 2025, p. 67 / 184 61 / 68 is used to indicate a number of OFDM symbols occupied by the first side-link positioning reference signal resource, a number of bits in the fifth bit field is 4, 10 or and M denotes a maximum number of consecutive OFDM symbols within a slot that are available for side-link transmission, other than OFDM symbols for a physical side-link shared channel demodulation reference signal PSSCH DMRS, a PSCCH and a physical side-link feedback channel PSFCH.

[00243] In some embodiments, second-stage SCIs include a sixth bit field, and the sixth bit field is used to indicate a starting point and a number of OFDM symbols occupied by the positioning reference signal feature of the first side link.

[00244] In some modes, a number of bits in the sixth bit field is determined based on Ij .MCM+DJ log,(—---) I -2, where M denotes a maximum number of symbols. Consecutive OFDM symbols within a slot that are available for side-link transmission, except for OFDM symbols for a PSSCH DMRS, a PSCCH, and a PSFCH, or M = 10.

[00245] In some embodiments, the first side-link positioning reference signal is located within a first slot, and the second-stage SCIs indicate whether or not a side-link positioning reference signal feature exists within another slot.

[00246] Figure 14 is a schematic structural diagram of a device according to an embodiment of this application. The dashed lines in Figure 14 indicate that the unit Petition 870250084704, dated 09 / 19 / 2025, p. 68 / 184 62 / 68 or module is optional. The 1400 device can be configured to implement the method described in the method embodiments above. The 1400 device can be a chip, a terminal device, or a network device.

[00247] The 1400 device may include one or more 1410 processors. The 1410 processor may support the 1400 device in implementing the methods described in the preceding method embodiments. The 1410 processor may be a general-purpose processor or a dedicated processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate logic device or transistor, a discrete hardware component, or similar. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor or similar.

[00248] The 1400 device may additionally include one or more 1420 memories. The 1420 memory stores a program that can be executed by the 1410 processor to cause the 1410 processor to execute the methods described in the embodiments of the method above. The 1420 memory may be separate from the 1410 processor or integrated into it.

[00249] The 1400 device may additionally include a 1430 transceiver. The 1410 processor may communicate with another device or chip via the transceiver. Petition 870250084704, dated 09 / 19 / 2025, p. 69 / 184 63 / 68 1430. For example, the 1410 processor can transmit data to and receive data from another device or chip via the 1430 transceiver.

[00250] One embodiment of this application additionally provides a computer-readable storage medium configured to store a program. The computer-readable storage medium can be applied to the terminal device provided in the embodiments of this application, and the program causes a computer to perform the methods performed by the terminal device in the various embodiments of this application.

[00251] One embodiment of this application additionally provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device provided in the embodiments of this application, and the program causes a computer to perform the methods performed by the terminal device in the various embodiments of this application.

[00252] One embodiment of this application additionally provides a computer program. The computer program can be applied to the terminal device provided in the embodiments of this application, and the computer program causes a computer to perform the methods performed by the terminal device in the various embodiments of this application.

[00253] It should be understood that the terms “system” and “network” in this request may be used interchangeably. Furthermore, the terms used in this request are used only to illustrate specific modalities of this request, but are not intended to limit it. The terms “first”, “second”, “third”, “fourth” and similar terms in the report Petition 870250084704, dated 09 / 19 / 2025, p. 70 / 184 64 / 68 descriptive, claims and drawings of this application are used to distinguish between different objects, rather than to describe a specific order. Furthermore, the terms “include” and “have” and any variations thereof are intended to encompass a non-exclusive inclusion.

[00254] In the modalities of this application, the indication mentioned herein may refer to a direct indication, or it may refer to an indirect indication, or it may mean that there is an association relationship. For example, A indicates B, which may mean that A directly indicates B, for example, B can be obtained through A; or it may mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or it may mean that there is an association relationship between A and B.

[00255] In the modalities of this request, B corresponding to A means that B is associated with A, and B can be determined based on A. However, it should still be understood that determining B based on A does not mean determining B based solely on A, but rather, B can be determined based on A and / or other information.

[00256] In forms of this application, the term "correspond" may mean that there is a direct or indirect correspondence between the two, or it may mean that there is an associative relationship between the two, or it may mean that there is a relationship such as indicating and being indicated, or configuring and being configured.

[00257] In embodiments of this application, “predefined” or “pre-configured” may be implemented by pre-storing corresponding code or a corresponding table in a device (for example, including a Petition 870250084704, dated 09 / 19 / 2025, p. 71 / 184 65 / 68 terminal device and a network device) or other ways that may be used to indicate related information, and a specific implementation thereof is not limited in this application. For example, being predefined may refer to being defined in a protocol.

[00258] In the embodiments of this application, the protocol may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol and a related protocol applied to a future communications system, which is not limited to in this application.

[00259] In the embodiments of this application, the term and / or is merely an association relation describing associated objects, and represents that there can be three types of relations. For example, A and / or B can represent three cases: only A exists, both A and B exist, and only B exists. In addition, the character / ” in the specification generally indicates an “or” relationship between the associated objects.

[00260] In the modalities of this request, the sequence numbers of previous processes do not signify execution sequences. The execution sequence of the processes must be determined according to the functions and internal logic of the processes, and should not be interpreted as any limitation in the implementation processes of the modalities of this request.

[00261] In the various embodiments provided in this application, it should be understood that the system, apparatus, and method disclosed may be implemented in another manner. For example, the embodiments of apparatus described are merely examples. For example, the division of units is merely a logical function division, and there may be another division in Petition 870250084704, dated 09 / 19 / 2025, p. 72 / 184 66 / 68 real implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the mutual couplings or direct couplings or communication connections shown or discussed may be implemented as indirect couplings or communication connections through some interfaces, devices or units, and may be implemented in electronic, mechanical or other forms.

[00262] The units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, and may be located in a single position or may be distributed across a plurality of network units. Some or all of the units may be selected according to the actual requirements to achieve the objective of the modal solutions.

[00263] Furthermore, functional units in the modalities of this application may be integrated into a processing unit, or each of the units may physically exist alone, or two or more units may be integrated into a unit.

[00264] All or some of the foregoing embodiments may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, the foregoing embodiments may be implemented wholly or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and Petition 870250084704, dated 09 / 19 / 2025, page 73 / 184 67 / 68 executed on a computer, the procedures or functions according to the embodiments of this application are generated wholly or partially. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored on a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (e.g., a coaxial cable, an optical fiber, and a digital subscriber line (digital subscriber line, DSL)) or in a wireless manner (e.g., infrared, wireless, and microwave).Computer-readable storage media can be any usable media readable by a computer, or a data storage device, such as a server or data center, integrating one or more usable media. Usable media can be magnetic media (e.g., a floppy disk, a hard disk, or magnetic tape), optical media (e.g., a digital video disc (DVD)), semiconductor media (e.g., a solid-state drive (SSD)), or similar.

[00265] The descriptions above are merely specific implementations of this application, but the scope of protection of this application is not limited to these. Any variation or substitution readily determined by a person skilled in the art within the scope of the art disclosed in this application. Petition 870250084704, dated 09 / 19 / 2025, page 74 / 184 68 / 68 should fall within the scope of protection of this application. Therefore, the scope of protection of this application will be subject to the scope of protection of the claims. Petition 870250084704, dated 09 / 19 / 2025, page 75 / 184

Claims

1 / 4 CLAIMS 1. A SIDE LINK TRANSMISSION METHOD characterized by comprising: transmitting or receiving, by a terminal device within a first resource pool, a first side link positioning reference signal, wherein the first resource pool is one of the following: a resource pool dedicated to a side link positioning reference signal; or a resource pool shared for a side link positioning reference signal and a side link data channel.

2. METHOD, according to claim 1, characterized in that the first set of resources is the dedicated set of resources.

3. METHOD, according to claim 2, characterized by presenting a one-to-one mapping relationship between a PSCCH resource of the physical side link control channel and a side link positioning reference signal resource in the first resource pool.

4. METHOD, according to claim 3, characterized in that a PSCCH feature and a side link positioning reference signal feature within a slot are associated with the same identifier.

5. METHOD, according to claim 2, characterized by further comprising: first selecting, by the terminal device, a target side link positioning reference signal feature and then selecting a PSCCH Petition 870250084704 feature, dated 09 / 19 / 2025, page 76 / 184 2 / 4 associated with the target side link positioning reference signal feature in a feature selection process.

6. METHOD, according to any one of claims 2 to 5, characterized in that the first side-link positioning reference signal is carried in a first side-link positioning reference signal resource within a first slot; the first slot further comprising a first PSCCH resource associated with the first side-link positioning reference signal resource; the SCIs being carried in the first PSCCH resource, the SCIs being used to schedule the first side-link positioning reference signal resource, and the SCIs comprising a second bit field; the second bit field being used to indicate a third side-link positioning reference signal resource; a slot in which a third side-link positioning reference signal resource is located being a second slot;and the third side-link positioning reference signal resource serves as a retransmission resource for the first side-link positioning reference signal.

7. METHOD, according to claim 6, characterized in that the third side-link positioning reference signal feature is any of the side-link positioning reference signal features within a slot.

8. METHOD, according to claim 7, characterized in that the second bit field is used to indicate one or more of the following: the second slot; or Petition 870250084704, dated 09 / 19 / 2025, page 77 / 184 3 / 4 an identifier of the third side link positioning reference signal feature.

9. METHOD, according to claim 8, characterized in that the second bit field comprises a fourth bit field, wherein the fourth bit field is used to carry an identifier of a fourth side-link positioning reference signal resource, and a quantity of bits in the fourth bit field is associated with a quantity of side-link positioning reference signal resources within a slot in the first resource pool.

10. METHOD, according to claim 9, characterized in that the number of bits in the fourth bit field is determined based on fto&zCl, where denotes a ceiling operation, denotes a number of retransmission resources indicated by the SCI, and denotes a number of side link positioning reference signal resources within a slot.

11. METHOD, according to claim 1, characterized in that the first resource grouping is the shared resource grouping; and / or in that the first side-link positioning reference signal is loaded into the first side-link positioning reference signal resource, and the first side-link positioning reference signal resource is scheduled based on second-stage SCI.

12. METHOD, according to claim 11, characterized by the second-stage SCI indicating an identifier of the first side-link positioning reference signal resource.

13. METHOD, according to claim 11, characterized by the second-stage SCIs indicating one or more of the following: an OFDM symbol occupied by the first side-link positioning reference signal feature; an interleaving size corresponding to the first side-link positioning reference signal; or an RE offset of the feature element corresponding to the first side-link positioning reference signal.

14. METHOD, according to any one of claims 11 to 13, characterized in that the first side-link positioning reference signal is located within a first slot, and the second-stage SCIs indicate or do not indicate a side-link positioning reference signal feature within another slot.

15. TERMINAL DEVICE characterized by comprising a memory and a processor, wherein the memory is configured to store a computer instruction, and the processor is configured to execute the computer instruction stored in memory to drive the terminal device to perform the method as defined in any one of claims 1 to 14. Petition 870250084704, dated 09 / 19 / 2025, pp. 79 / 184

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