METHOD AND APPARATUS FOR MAPPING RESOURCES, DEVICE AND STORAGE MEDIUM

Description

1 / 80 METHOD AND APPARATUS FOR MAPPING RESOURCES AND THEIR CHIP FIELD OF TECHNIQUE

[001] The present disclosure relates to the field of communications technology and, in particular, relates to a method and apparatus for mapping resources, and a chip for those resources. RELATED TECHNIQUE

[002] With advances in side-link communication, side-link based positioning was introduced. In side-link based positioning, a side-link positioning reference signal (SL PRS) must be transmitted between the terminal devices in side-link communication, and the transmission of the SL PRS can be indicated by means of second-stage side-link control information (SCI). SUMMARY

[003] The embodiments of the present disclosure provide a method and apparatus for mapping resources, and a chip thereof. The solutions of the technique are as follows.

[004] According to some embodiments of the present disclosure, a method for resource mapping is provided. The method is performed by a terminal device and includes:

[005] map second-stage SCI modulation symbols to a time-frequency feature, wherein the second-stage SCI at least indicates the transmission of an SL PRS. Petition 870250091864, dated 08 / 10 / 2025, pages 108 / 205 2 / 80

[006] According to some embodiments of the present disclosure, a resource mapping apparatus is provided. The apparatus includes:

[007] a processing module, configured to map second-stage SCI modulation symbols to a time-frequency resource, wherein the second-stage SCI indicates at least the transmission of an SL PRS.

[008]

[009] According to some embodiments of the present disclosure, a chip is provided. The chip includes a set of programmable logic circuits and / or program instructions, wherein the chip, when running, is configured to perform the method for resource mapping.

[0010] BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of a network architecture according to some embodiments of the present disclosure;

[0012] Figure 2 is a schematic diagram of some of the symbols in a slot for SL transmission according to some embodiments of the present disclosure;

[0013] Figure 3 is a schematic diagram of a slot structure of a physical side link control channel (PSCCH) and a shared physical side link channel (PSSCH) according to some embodiments of the present disclosure;

[0014] Figure 4 is a schematic diagram of the time-domain positions of four demodulation reference signals (DMRSs) in a case where a PSSCH includes 13 symbols, according to some embodiments of the present Petition 870250091864, dated 08 / 10 / 2025, p. 109 / 205 3 / 80 revelation;

[0015] Figure 5 is a schematic diagram of a position in the frequency domain of a PSSCH DMRS according to some embodiments of the present disclosure;

[0016] Figure 6 is a schematic diagram of a grouping of PSCCH and PSSCH resources in a new radio (NR) vehicle for everything (V2X) according to some embodiments of the present disclosure;

[0017] Figure 7 is a schematic diagram of a slot structure in an NR system according to some embodiments of the present disclosure;

[0018] Figure 8 is a schematic diagram of a comb size and feature element (RE) offsets according to some embodiments of the present disclosure;

[0019] Figure 9 is a schematic block diagram of intertwined resource blocks (IRBs) according to some embodiments of the present disclosure;

[0020] Figure 10 is a schematic diagram of a framework structure based on IRB according to some embodiments of the present disclosure;

[0021] Figure 11 is a schematic diagram of resource building blocks according to some embodiments of the present disclosure;

[0022] Figure 12 is a flowchart of a method for mapping resources according to some modalities of the present disclosure;

[0023] Figure 13 is a schematic diagram of a slot structure of a PSCCH and a PSSCH according to some embodiments of the present disclosure;

[0024] Figure 14 is a schematic diagram of Petition 870250091864, dated 08 / 10 / 2025, page 110 / 205 4 / 80 second-stage SCI mapping according to some embodiments of the present disclosure;

[0025] Figure 15 is a schematic diagram of second-stage SCI mapping and an SL PRS according to some embodiments of the present disclosure;

[0026] Figure 16 is a schematic diagram of the second-stage SCI mapping and of an SL PRS according to some embodiments of the present disclosure;

[0027] Figure 17 is a schematic diagram of the mapping of second-stage SCI and SL PRSs according to some embodiments of the present disclosure;

[0028] Figure 18 is a schematic diagram of the mapping of second-stage SCI and SL PRSs according to some embodiments of the present disclosure;

[0029] Figure 19 is a block diagram of a device for resource mapping according to some embodiments of the present disclosure; and

[0030] Figure 20 is a schematic structural diagram of a terminal device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0031] For clearer descriptions of the objects, solutions of the technique and advantages of the present disclosure, the embodiments of the present disclosure are described in detail hereafter in this document in combination with the accompanying drawings.

[0032] The network architecture and service scenarios described in the embodiments of this disclosure are intended to illustrate the solutions of the technique according to the embodiments of this disclosure more clearly, and not Petition 870250091864, dated 08 / 10 / 2025, p. 111 / 205 5 / 80 as any limitations. Those skilled in the art understand that, with the evolution of network architecture and the emergence of new service scenarios, the solutions of the art according to the embodiments of the present disclosure are also applicable to solve similar problems of the art.

[0033] Figure 1 is a block diagram of a network architecture according to some embodiments of the present disclosure. The network architecture involves a main network 11, an access network 12 and a terminal device 13.

[0034] The core network 11 includes several core network devices. Each of the core network devices has the primary function of providing user connection, user management, and service support, and is designated as a carrier network to provide an interface to an external network. For example, a core network of a 5th generation (5G) NR system includes an Access and Mobility Management (AMF) function entity, a User Plane Function (UPF) function entity, a Session Management Function (SMF) function entity, and other devices.

[0035] Access network 12 includes several access network devices 14. The access network in the NR 5G system is also called next-generation radio access network (NG-RAN). Each of the access network devices 14 is a device deployed in the access network 12 and configured to provide a wireless communication function to the terminal device 13. Access network devices 14 include various types of macro base stations, micro base stations, relay stations, access points, and the like. In systems that use different technologies of Petition 870250091864, dated 08 / 10 / 2025, page 112 / 205 6 / 80 radio access, devices with access network device functionality have different names, for example, gNodeBs or gNBs in 5G NR systems. With the evolution of communication technologies, the name access network device varies. For a convenient description, devices that provide the wireless communication function for the terminal device 13 are collectively called access network devices in the embodiments of the present disclosure.

[0036] In general, a plurality of terminals are provided. One or more terminal devices 13 may be deployed in a cell managed by each of the access network devices 14. The terminal devices 13 include various portable devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, various forms of user equipment (UEs), mobile stations (MSs), and other devices with wireless communication functionality. For convenient description, the devices are collectively referred to as a terminal device. The access network device 14 and the main network device communicate with each other using air interface technology, such as an NG interface in an NR system. GG. The access network device 14 and the terminal device 13 communicate with each other using air interface technology, as a Uu interface. The terminal device in the embodiments of the present disclosure is also referred to as UE, which has the same meaning.

[0037] Terminal device 13 and terminal device 13 (e.g., vehicle-mounted device and other devices, (e.g., other devices) Petition 870250091864, dated 08 / 10 / 2025, p. 113 / 205 7 / 80 vehicle-mounted devices, mobile phones, roadside units (RSUs), or similar devices communicate with each other via a direct communication interface (e.g., a ProSe Communication 5 (PC5) interface), and the communication link established via the direct communication interface is consequently termed a direct link or SL. SL communication indicates that the transmission of communication data between terminal devices is performed via SL, which is different from the traditional cellular system in which communication data is received or transmitted via the access network device. Thus, SL communication has the characteristics of short latency and low overhead, and is suitable for communication between two terminal devices in geographically close locations (e.g., a vehicle-mounted device and other peripheral devices in geographically close locations).It should be noted that Figure 1 illustrates only the use of vehicle-to-vehicle communication in the V2X scenario as an example, and SL technology is applicable to a scenario where multiple terminal devices communicate directly with each other. In other words, the terminal device in the present disclosure is any device that implements communication using SL technology.

[0038] The NR 5G system in the embodiments of this disclosure is also referred to as a 5G system or an NR system, and those skilled in the art can understand the meaning. The solutions of the art, according to the embodiments of this disclosure, are applicable to the NR 5G system and to evolved systems of the NR 5G system.

[0039] Before the description of the solutions of the technique Petition 870250091864, dated 08 / 10 / 2025, pp. 114 / 205 8 / 80 In accordance with the present disclosure, some background technical knowledge involved in the present disclosure is first presented and explained. The following related technologies, as optional solutions, may be arbitrarily combined with the solutions of the technique according to the embodiments of the present disclosure, which are within the scope of protection of the embodiments of the present disclosure. The embodiments of the present disclosure include at least part of the following content. 1. NR-V2X SLOT STRUCTURE

[0040] In NR-V2X, the PSSCH and the associated PSCCH are transmitted in the same slot, and the PSCCH occupies two or three symbols of the slot. Resource allocation in the time domain in NR-V2X is performed at a slot granularity. A start point and a duration of symbols in the time domain used for side-link transmission in a slot are configured based on the sl-startSLsymbols and sllengthSLsymbols parameters. A last symbol in the symbols is used as a guard period (GP), and thus the PSSCH and PSCCH only use other symbols from a time domain different from the last symbol. However, in a case where a physical side-link feedback channel (PSFCH) transmission resource is configured in a slot, the PSSCH and PSCCH cannot occupy a symbol in the time domain used for PSFCH transmission, and an automatic gain control (AGC) and a GP symbol before the symbol.

[0041] As illustrated in Figure 2, the network configures sl-StartSymbol=3 and sl-LengthSymbols=11. That is, 11 symbols in the time domain of symbol 3 (the symbol with index 3) in a slot are used for side link transmission. Petition 870250091864, dated 08 / 10 / 2025, pages 115 / 205 9 / 80 The slot includes the PSFCH transmission feature, and PSFCH occupies symbol 11 and symbol 12. Symbol 11 is used as the PSFCH AGC symbol, symbols 10 and 13 are used as GPs, and the time-domain symbols used for PSSCH transmission are from symbol 3 to symbol 9. PSCCH occupies three time-domain symbols, namely symbol 3, symbol 4, and symbol 5, and symbol 3 is generally used as the AGC symbol.

[0042] In NR-V2X, a side link slot includes a PSFCH different from the PSCCH and PSSCH. In the slot, a first orthogonal frequency division multiplexing (OFDM) symbol is generally used as AGC, and the UE replicates the transmitted information in a second symbol in the symbol of AGC. A final symbol in the slot is used for transmit-receive conversion, i.e., used for the UE to convert from a transmit (or receive) state to a receive (or transmit) state. In the remaining OFDM symbols, the PSCCH occupies two or three OFDM symbols from a second side link symbol. In the frequency domain, the number of physical resource blocks (PRBs) occupied by the PSCCH is within a sub-band range of the PSSCH. In a case where the number of PRBs occupied by the PSCCH is less than the size of a PSSCH subchannel, or in a case where the resource in the PSSCH frequency domain includes a plurality of subchannels, frequency division multiplexing is performed on the PSCCH and on the PSSCH in the OFDM symbol containing the PSCCH.

[0043] PSSCH is used to port second-stage SCI and a shared SL (SCH) channel. Two second-stage SCI formats are available, namely SCI 2-A format and format Petition 870250091864, dated 08 / 10 / 2025, p. 116 / 205 The 10 / 80 SCI 2-B format is defined in the related technologies. The SCI 2-B format is applicable to a selective broadcast communication mode for side-link hybrid automatic repeat request (HARQ) feedback based on distance information; and the SCI 2-A format is applicable to other scenarios, for example, point-to-point broadcast, selective broadcast, and broadcast that do not require side-link HARQ feedback, a point-to-point communication mode that requires side-link HARQ feedback, and a selective broadcast communication mode that must provide either an acknowledgment (ACK) or a negative acknowledgment (NACK) feedback. A second-stage SCI format, i.e., the SCI 2-C ​​format, is additionally introduced in the related technologies, and the SCI 2-C ​​format is used to indicate a set of reference features and a trigger signal in some cases.The modulation symbols of the second-stage SCI are mapped in a sequence of first the frequency domain and then the time domain from a symbol containing a first DMRS of PSSCH, and are multiplexed with REs of the DMRS in an interlaced mode on the symbol. Furthermore, the modulation symbols of the second-stage SCI are mapped to an RE of a phase-tracking reference signal (PT-RS), as illustrated in Figure 3. TABLE 1 ORTHOGONAL COVERAGE CODES (OCCS) FOR PSCCH DMRS OCC Index OCC i = 0 i = 1 i = 2 0 1 1 1 1 1 ei 2 / 3π e - j 2 / 3π Petition 870250091864, dated 08 / 10 / 2025, pp. 117 / 205 11 / 80 2 1 e - j V3x e 2!3x

[0044] In a side-link communication system, different UEs transmit the PSCCH on the same time-frequency resource where the UE autonomously selects the resource or determines a transmission resource based on the network's side-link resource scheduling. The PSCCH DMRS is random in LTE-V2X to ensure that the receiver detects at least one PSCCH in the PSCCH resource collision. Specifically, in a case where the UE transmits the PSCCH, the UE randomly selects a value from a set {0, 3, 6, 9} as a cyclic offset value of the DMRSs. In a case where the PSCCH DMRSs transmitted by a plurality of UEs on the same time-frequency resource adopt different cyclic offset values, the receiving UE still detects at least one PSCCH through an orthogonal DMRS. For the same purpose, three PSCCH DMRS frequency domain OCCs are configured in NR-V2X for random selection by the UE transmitter, as listed in Table 1.An i-th bit of the OCC is applicable to an i-th DMRS RE in the resource block (RB) to distinguish different UEs.

[0045] The PSSCH DMRS in NR-V2X is based on the Uu interface design in NR, and a plurality of time-domain PSSCH DMRS patterns are used. In a feature set, the number of available DMRS patterns is related to the number of PSSCH symbols in the feature set. For a specific number of PSSCH symbols (including the first AGC symbol) and a specific number of PSCCH symbols, the available DMRS patterns and the positions of the DMRS symbols in the pattern are illustrated in the Petition 870250091864, dated 08 / 10 / 2025, pp. 118 / 205 12 / 80 Table 2. Figure 4 is a schematic diagram of the time-domain positions of four DMRSs in a case where a PSSCH includes 13 symbols. TABLE 2 NUMBER OF DMRS SYMBOLS AND POSITIONS OF DMRS symbols in different numbers of PSSCH symbols and PSCCH symbols. Number of PSCCH symbols (including a first AGC symbol) DMRS symbol positions (relative to the position of a first AGC symbol) Number of PSCCH symbols is 2 Number of PSCCH symbols is 3 Number of DMRS symbols Number of DMRS symbols 2 3 4 2 3 4 6 1, 5 1, 5 7 1, 5 1, 5 8 1, 5 1, 5 9 3, 8 1, 4, 7 4, 8 1, 4, 7 10 3, 8 1, 4, 7 4, 8 1, 4, 7 11 3, 10 1, 5, 9 1, 4, 7, 10 4, 10 1, 5, 9 1, 4, 7, 10 12 3, 10 1, 5, 9 1, 4, 7, 10 4, 10 1, 5, 9 1, 4, 7, 10 13 3, 10 1, 6, 11 1, 4, 7, 10 4, 10 1, 6, 11 1, 4, 7, 10

[0046] In a case where a plurality of DMRS patterns in the time domain is configured in the feature set, the transmitting UE selects a specific DMRS pattern in the time domain used and indicates the DMRS pattern in the first-stage SCI. In this way, a UE moving at high speed selects a high-density DMRS pattern to ensure the accuracy of the estimate of Petition 870250091864, dated 08 / 10 / 2025, pp. 119 / 205 A 13 / 80 channel, and a UE that moves at low speed uses a low-density DMRS pattern to enhance spectral efficiency.

[0047] The method for generating the DMRS sequence of PSSCH is almost the same as the method for generating the DMRS sequence of PSCCH, and the two methods only differ in that an initialization parameter of a pseudorandom sequence c(m) is cinit, L-1-i is used to determine cinit, Pi is the i-th bit of the PSCCH cyclic redundancy check (CRC) for scheduling the PSCCH, and L=24L is the number of bits of the CRC of PSCCH.

[0048] Two DMRS frequency domain standards, namely DMRS frequency domain type 1 and DMRS frequency domain type 2, are supported in NR PDSCH and the physical uplink shared channel (PUSCH). For each frequency domain type, two different types are configured (i.e., a single DMRS symbol and a dual DMRS symbol). The single symbol DMRS frequency domain type 1 supports four DMRS ports, and the single symbol DMRS frequency domain type 2 supports six DMRS ports. For dual DMRS symbols, the number of supported ports doubles. However, in NRV2X, since the PSSCH only needs to support a maximum of two DMRS ports, only the single symbol DMRS frequency domain type 1 is supported, as illustrated in Figure 5. 2. DETERMINATION OF RESOURCES IN THE FREQUENCY DOMAIN EM NR-V2X

[0049] Similar to LTE-V2X, the features in Petition 870250091864, dated 08 / 10 / 2025, pp. 120 / 205 The 14 / 80 frequency domain of NR-V2X resource clustering is also contiguous, and the granularity of resource allocation within the frequency domain is also a subchannel. The number of PRBs in a subchannel is any one of {10, 12, 15, 20, 50, 75, 100}. A minimum subchannel size is 10 PRBs, which is much larger than the minimum subchannel size of 4 PRBs in LTE-V2X. The reason for this is that, in NR-V2X, the resources in the PSCCH frequency domain are configured in a first subchannel of the associated PSCCH, the resources in the PSCCH frequency domain are smaller than or equal to the size of the PSSCH subchannel, the resources in the PSCCH time domain occupy two or three OFDM symbols, and few resources are available for the PSCCH. An increased bit rate and reduced PSCCH detection performance are caused in a case where the subchannel size is small.In NR-V2X, the PSSCH subchannel size and the PSCCH frequency domain feature size are configured independently, under the assumption that the PSCCH frequency domain features are less than or equal to the PSSCH subchannel size. The following configuration parameters in the NR-V2X feature set configuration information are used to determine the frequency domain features of a PSCCH and PSSCH feature set.

[0050] · sl-SubchannelSize, which indicates a number of contiguous PRBs in a subchannel in a resource cluster, with a range of values ​​of {10,12,15,20,50,75,100}PRBs;

[0051] · sl-NumSubchannel, which indicates a number of subchannels in a resource grouping;

[0052] · sl-StartRB-Subchannel, which indicates an index of an initial RB in a first subchannel in a Petition 870250091864, dated 08 / 10 / 2025, pp. 121 / 205 15 / 80 resource pooling;

[0053] · sl-RB-Number, which indicates a number of contiguous PRBs in a resource cluster; and

[0054] · sl-FreqResourcePSCCH, which indicates the size of the frequency domain resources in a PSCCH, with a range of values ​​of {10,12,15,20,25}PRBs.

[0055] In a case where the UE determines a resource pool for PSSCH transmission or reception, the frequency domain resources in the resource pool are sl-NumSubchannel contiguous subchannels from a PRB indicated by sl-StartRB-Subchannel. In a case where the number of PRBs in contiguous subchannels sl-NumSubchannel is less than the number of PRBs indicated by sl-RB-Number, the remaining PRBs are not used for PSSCH transmission or reception.

[0056] In NR-V2X, an initial position in the frequency domain of the first subchannel of the PSCCH and an initial position in the frequency domain of the first subchannel of the associated PSSCH are aligned. Therefore, the initial position of each PSSCH subchannel can be the initial position in the frequency domain of the PSCCH, and the frequency domain range of the PSCCH and the PSSCH feature grouping is determined based on the parameters above, as illustrated in Figure 6.

[0057] In NR-V2X, PSCCH is used to carry and monitor the related SCI, and the SCI includes:

[0058] · a scheduled transmission priority;

[0059] · resource allocation in the frequency domain, which indicates a number of resources in the PSSCH frequency domain scheduled by the PSCCH in the current slot, and the number of resources in the frequency domain and the initial position of the resources in the frequency domain of a maximum of two Petition 870250091864, dated 08 / 10 / 2025, pp. 122 / 205 16 / 80 retransmission resources reserved;

[0060] · resource allocation in the time domain, which indicates the location in the time domain of at most two reserved relay resources;

[0061] · a reference signal pattern of PSSCH;

[0062] · second-stage SCI format;

[0063] • second-stage SCI bit rate shift;

[0064] • the number of DMRS ports of PSSCH;

[0065] • Modulation and Coding Scheme (MCS)

[0066] • indication of MCS form;

[0067] • various PSFCH symbols;

[0068] • a resource reservation periodicity, which reserves resources for transmission of another transport block (TB) in the next periodicity, in a case where intra-TB resource reservation is not enabled in the resource grouping configuration, the information bit field is not present.

[0069] • Reserved bits, 2 to 4 bits. The exact number of bits is configured by the network or pre-configured.

[0070] Since the PSCCH and the programmed PSSCH are always transmitted in the same slot, and the initial position of the PRBs occupied by the PSCCH is the initial position of the first subchannel of the programmed PSSCH, the initial position in the time domain and the initial position in the frequency domain of the programmed PSSCH are not explicitly indicated in the SCI 1-A format. 3. DETERMINATION OF TIME DOMAIN RESOURCES (SLOTS) IN NR-V2X Petition 870250091864, dated 08 / 10 / 2025, pp. 123 / 205 17 / 80

[0071] In NR-V2X, PSCCH / PSSCH transmission is slot-level. That is, only one PSCCH / PSSCH is transmitted in a slot, a plurality of PSCCHs / PSSCHs are not transmitted in a slot via a time-division multiplexing (TDM) mode, and PSCCHs / PSSCHs between different users are multiplexed into a slot via a frequency-division multiplexing (FDM) mode. The time-domain resources of PSSCH in NR-V2X are at slot granularity. However, unlike LTE-V2X, where PSSCH occupies all symbols in the time domain in a subframe, PSSCH in NR-V2X may occupy some symbols in a slot. This is mainly because, in the LTE system, uplink transmission and downlink transmission are also at subframe granularity. Therefore, side-link transmission is also at the subframe granularity (special subframes in the TDD system are not used for side-link transmission).In the NR system, a flexible slot structure is adopted; that is, both the uplink symbol and the downlink symbol are in one slot. This allows for more flexible scheduling and reduced latency. A typical subframe of an NR system is illustrated in Figure 7. The slot includes downlink (DL) symbols, uplink (UL) symbols, and flexible symbols. Downlink symbols are located at the beginning of the slot, uplink symbols are located at the end of the slot, flexible symbols are located between the downlink and uplink symbols, and the number of various symbols in each slot is configurable.

[0072] The side link transmission system Petition 870250091864, dated 08 / 10 / 2025, pp. 124 / 205 18 / 80 shares the carrier with the cellular system. In this case, the uplink transmission resources of the cellular system are used for sidelink transmission. For NR-V2X, in a case where sidelink transmission must occupy all time-domain symbols in a slot, the network must configure a slot with all uplink symbols for sidelink transmission, so that the uplink and downlink data transmission of the NR system is heavily affected and the system performance is reduced. Therefore, in NR-V2X, some time-domain symbols in a slot are used for sidelink transmission, that is, some uplink symbols in a slot are used for sidelink transmission.Furthermore, since AGC symbols and GP symbols are included in side-link transmission, fewer symbols are available for valid data transmission, and a low resource utilization rate is caused by removing these symbols. AGC and GP symbols in a case where the number of uplink symbols available for side-link transmission is small. Therefore, in NR-V2X, side-link transmission occupies at least seven symbols in the time domain (which includes the GP symbol). In a case where the side-link transmission system uses a proprietary carrier, the side-link transmission system does not share transmission resources with other systems, and all symbols in the slot are configured for side-link transmission.

[0073] As mentioned above, in NR-V2X, the start point and duration of symbols in the time domain for side-link transmission in a slot are configured Petition 870250091864, dated 08 / 10 / 2025, pages 125 / 205 19 / 80 based on the position of an initial si-StartSymbol and the number of si-Lengthsymbols. The last symbol in the time-domain symbol for side-link transmission is used as GP. PSSCH and PSCCH only use the remaining symbols in the time-domain. However, if PSFCH transmission capabilities are configured in a slot, PSSCH and PSCCH cannot occupy the time-domain symbols for PSFCH transmission, the AGC symbol, and the GP symbols preceding the time-domain symbols.

[0074] In the NNR-V2X system, resources in the time domain of the resource cluster are also indicated by a bitmap. Due to the flexible slot structure in the NR system, the length of the bitmap is expanded, and the supported bitmap length range is [10:160]. The method for determining the slot position belonging to the resource cluster in a system frame number (SFN) periodicity using the bitmap in NNR-V2X and the method in LTE-V2X are the same and differ in the following:

[0075] · a total number of slots in an SFN periodicity is , where the parameter μ is related to the slot size between subcarriers. [007 6] · in a case where at least one of the symbols in the time domain ^ / ,5 / + 1,5 / +2,...,5 / + ^ / -1 in an s]_op is not configured as an uplink symbol by the network's TDD-UL-DL-ConfigCommon signaling, the slot cannot be used for sidelink transmission, where Y and X represent sl-StartSymbol and si-Lengthsymbols, respectively.

[0077] Specifically,

[0078] · In SI, slots that do not belong to Petition 870250091864, dated 08 / 10 / 2025, pages 126 / 205 20 / 80 resource grouping in SFN periodicity is removed. Slots include synchronous slots and slots that cannot be used for side-link transmission, and the remaining slots are represented as a set of remaining slots and are GoA·'”4(10240X2-.V$ÍSB-W,âosi-1) ) renumbered as ;

[0079] · where represents a number of synchronous slots in an SFN periodicity, and the synchronization slot is determined based on a configuration parameter related to synchronization and is related to a periodicity for transmitting a synchronization signal block (SSB), the number of SSB transmission resources configured in the periodicity, and the like;

[0080] · represents a number of slots in an SFN periodicity that do not conform to the starting point of the uplink symbol and the numerical configuration. In the case where at least one of the timedomain symbols UF + 1, / + 2, ..., / + Jí — 1 in an s]_op is not semi-persistently configured as an uplink symbol, the slot cannot be used for sidelink transmission, where Y and X represent, respectively, sl-StartSymbol and si-Lengthsymbols.

[0081] · In S2, a number of reserved slots and their corresponding positions in the time domain are determined;

[0082] · in a case where the number of slots in the remaining slot set is divided equally by the length of the bitmap, the number of reserved slots and their corresponding positions in the time domain are determined. Petition 870250091864, dated 08 / 10 / 2025, p. 127 / 205 21 / 80 Specifically, in the case where a slot lr(0 < r < 10240 X 2** — NS SSB-NnaoSi satisfies the following conditions, the slot is a reserved slot. _ 1^ (10240X2^-^5 553-ííoãoSI )

[0083] ^eserrado — ¢10240 X 2μNs SSBNnãosi, ) modde tIt3jf . £ reserv^aorepresen£a o número de slots reservados emapa de hlt3representa o comprimento do mapa de bits, 0t,..tNreservãdo 1

[0084] · In S3, reserved slots are removed from the remaining slot set. The remaining slot set is represented as a logical slot set. All slots in the slot set are available for grouping. ...) of resources, and are renumbered as . Imax 10240 X 2PNς SSB ^nonSIí ^reserved

[0085] · In S4, the slots belonging to the resource grouping in the logical set of slots are determined based on the bit map.

[0086] · the bitmap in the information of [bn,b',...,bT1) , ,zy V 1 Amaps de tits J configuration of the resource set and . For (θ — < (10240 X 2μN$_ssb ^nSoez, Nreservadcl)) the slot in the set of logical slots, in the case where—*-, the slot belongs to the slot grouping k' = k mod Lmapa de hits Petition 870250091864, dated 08 / 10 / 2025, p. 128 / 205 22 / 80

[0087] · In S5, the slots determined in S4 that belong to the resource cluster are renumbered as 41* , where ^e{0, 1, ..., θ represents the number of slots in the resource cluster. 4. POSITIONING BASED ON DOWNLINK LINK

[0088] In downlink-based positioning, the DL PRS configuration for a maximum of four positioning frequency layers is provided for a UE. A parameter structure for each positioning frequency layer is provided with the following PRS configuration parameters:

[0089] · A PRS signal subcarrier slot.

[0090] · A cyclic prefix length (CP) of the PRS signal.

[0091] · A bandwidth of resources in the frequency domain of the PRS, a parameter value is the number of PRBs allocated to the PRS signal. A minimum bandwidth of PRS resources is 24 PRBs with a granularity of 4 PRBs, and a maximum bandwidth is 272 PRBs.

[0092] · An initial frequency position of the PRS feature's frequency domain, which defines an index number of an initial PRB allocated to the PRS signal in the frequency domain. The PRB index number is defined relative to PRS Point A.

[0093] · A reference point in the frequency domain (Point A) of the PRS signal.

[0094] · A comb size for the PRS signal is penteN. Petition 870250091864, dated 08 / 10 / 2025, pp. 129 / 205 23 / 80

[0095] The PRS parameters configured in each positioning frequency layer are applicable to all PRS features in the positioning frequency layer. That is, in a positioning frequency layer, all PRS signals from a plurality of different transmit and receive points (TRPs) adopt the same subcarrier slot, the same CP length and the same comb size, are transmitted in the same frequency subband and occupy exactly the same bandwidth. In this way, the UE simultaneously receives and measures PRS signals from a plurality of different TRPs at the same frequency point.

[0096] The TRP layer parameters include an identifier (ID) parameter to uniquely identify the positioning TRP, a TRP physical cell ID, a TRP global NR cell ID (NCGI), and an absolute radio frequency channel number (ARFCN) of the TRP. A maximum of two sets of DL PRS features are configured in each TRP layer. The DL PRS feature set layer parameters are configured with the following parameters, applicable to all DL PRS features in the feature set.

[0097] · An ID of a DL PRS resource set (nr-DL-PRS-ResourceSetID).

[0098] · A DL PRS transmission periodicity and slot offset (dl-PRS-Periodicity-andResourceSetSlotOffset), which defines the transmission behaviors in the time domain of all DL PRS resources in the DL PRS resource set. A configurable minimum transmission periodicity for DL ​​PRS is 4 milliseconds, and a maximum transmission periodicity is Petition 870250091864, dated 08 / 10 / 2025, pages 130 / 205 24 / 80 10240 milliseconds. The DL PRS configuration supports flexible subcarrier intervals, including 15 kHz, 30 kHz, 60 kHz, and 120 kHz. At different subcarrier intervals, the configurable DL PRS transmission periodicity ranges are the same. Figure 8 is a schematic diagram with a comb size of 2 and RE offsets of 0 and 1.

[0099] · A repetition factor of DL PRS resources (dl-PRS-ResourceRepetitionFactor), which defines a number of repetitive transmissions of a PRS resource in each PRS periodicity. Repetitive transmission of the same DL PRS resource is used by the UE to collect the energy of the DL PRS signals transmitted multiple times in order to increase the DL PRS coverage distance and positioning accuracy. In the FR2 system, repetitive transmission of DL PRS resources is used by the UE as a receive beam sweep operation. The UE uses different receive beams to receive repetitive transmissions of the same DL PRS resource in order to find an ideal TRP transmission beam that matches the UE's receive beam. Furthermore, repetitive transmission of the DL PRS resource increases PRS overhead. In the 3GPP NR R16 specification, a repeatability value for DL ​​PRS features is any one of 1, 2, 4, 6, 8, 16, and 32.

[00100] · A time interval for repetitive transmission of the DL PRS resource (dl-PRS-ResourceTimeGap), which defines a number of slots between two contiguous repetitive transmissions of the same PRS resource.

[00101] · DL PRS muting configuration, which defines that a DL PRS signal is not transmitted in a Petition 870250091864, dated 08 / 10 / 2025, p. 131 / 205 25 / 80 allocated time-frequency resource (referred to as muting). Muting refers to the fact that the DL PRS signal is not transmitted on all allocated time-frequency resources and is intentionally not transmitted on a specified time-frequency resource. Muting is designed to avoid collisions with other signals (e.g., the SSB) and to prevent interference between signals from different TRPs. For example, the transmission of the DL PRS from a TRP is intentionally suspended at a certain point so that the UE receives a DL PRS signal from a remote TRP. The PRS muting operation is described in detail in the subsequent description, which is not elaborated on in this document.

[00102] · A number of OFDM symbols occupied by the DL PRS resource (dl-PRS-NumSymbols), which defines a number of OFDM symbols allocated to a DL PRS resource in a slot.

[00103] As mentioned above, all parameters configured in the configuration layer of a DL PRS resource set are applicable to all DL PRS resources in the resource set. Therefore, all DL PRS resources in the same DL PRS resource set are transmitted with the same periodicity, with the same number of repetitive transmissions, and occupy the same number of OFDM symbols.

[00104] Each DL PRS resource is configured with the following parameters:

[00105] · A DL PRS resource ID (nr-DLPRS-ResourcelD);

[00106] • A PRS sequence ID of DL (dl-PRSSequencelD). Petition 870250091864, dated 08 / 10 / 2025, page 132 / 205 26 / 80

[00107] · An initial offset of the feature unit in the frequency domain of the DL PRS (dl-PRSCombSizeN-AndReOffset), which defines a feature unit offset value in the frequency domain used for mapping features of the DL PRS feature in the first OFDM symbol allocated in a slot. Based on the parameter and relative offset value specified in TS38.211, the UE determines the feature unit offset values ​​in the frequency domain used for mapping features in each OFDM symbol.

[00108] · A resource slot displacement of DL PRS (dl-PRS-ResourceSlotOffset), which defines a slot offset relative to the DL PRS resource set. The slot position of each DL PRS resource is determined based on the parameter.

[00109] · A displacement of the OFDM symbol from DL PRS (dl-PRS-ResourceSymbolOffset), which defines a time-frequency resource allocation position of a DL PRS resource in a slot and indicates an index number of the initial OFDM symbol in the slot.

[00110] · DL PRS Quasi-Colocalization (QCL) Information (dl-PRS-QCL-Info), which provides the QCL information of the DL PRS signal. 5. UNLICENSED SPECTRUM SIDELINK (SL-U)

[00111] In SL-U, sidelink transmission must meet specific regulatory requirements, for example, a minimum occupied channel bandwidth (OCB) and a maximum power spectral density (PSD). For the OCB requirement, in the case where the EU transmits data over the channel, the OCB is not less than 80% of the bandwidth of a Petition 870250091864, dated 08 / 10 / 2025, pp. 133 / 205 27 / 80 channel; and for the maximum PSD requirement, the UE transmission power per 1 MHz is no more than 10 dBm. An Interleaved Resource Block (IRB) structure is used in SL-U to meet OCB and PSD regulatory requirements. An IRB includes N discrete RBs in the frequency domain, M IRBs are included in a frequency band range, and the number of RBs in an m-th IRB is any one of {m, M+m, 2M+m, 3M+m, ...}.

[00112] As illustrated in Figure 9, the system bandwidth includes 20 RBs and five IRBs (i.e., M=5), and each IRB includes four RBs (i.e., N=4). The intervals in the frequency domain of two adjacent RBs belonging to the same IRB are the same, i.e., five RBs. The numbers in the boxes in the drawing represent the IRB index.

[00113] In the SL-U system, when the resource allocation granularity is an IRB, the channels, for example, the PSCCH and PSSCH, of the SL-U system are configured based on the IRB structure. In this case, the frame structure of the SL-U system is illustrated in Figure 10, and the numbers in the boxes in the drawing represent the IRB index. Figure 10 is a schematic diagram of a one-slot frame structure that includes only one PSCCH and one PSSCH and does not include a PSFCH. The bandwidth illustrated in the drawing includes 20 RBs, and five IRB resources are configured (i.e., M=5). Each IRB resource includes four RBs, and the numbers in the boxes in the drawing represent the IRB index. In Figure 10, the system configures the PSCCH to occupy one IRB resource and two OFDM symbols in the time domain. The PSSCH uses one IRB as its granularity. The first symbol in the slot is an AGC symbol, and the last symbol is a GP symbol. In the design, PSSCH 1 occupies IRB#0 and Petition 870250091864, dated 08 / 10 / 2025, p. 134 / 205 28 / 80 IRB#1, and the corresponding PSCCH 1 occupies IRB#0; and PSSCH 2 occupies IRB#2, and the corresponding PSCCH 2 also occupies IRB#2. It should be noted that, in the diagram, the resources occupied by the second-stage SCI and the resources occupied by the PSCCH DMRS and the PSSCH DMRS are not illustrated for simplification purposes.

[00114] In SL-U, the UE accesses the listening-before-speaking (LBT) channel. The LBT adopts a granularity of 20 MHz in the frequency domain. Each 20 MHz is called an RB set. A carrier includes a plurality of RB sets, and a GP is present between the RB sets, as illustrated in Figure 11.

[00115] In SL-U, the UE must perform the LBT first and access the channel after the LBT. However, the time for the UE to perform the LBT is undefined. In a case where the UE starts transmitting from the starting point of a window, the UE may miss a transmission opportunity due to LBT failure. Therefore, in SL-U, a transmission starting point is added to a slot, i.e., transmission from multiple starting points is defined for SL-U. For example, the additional starting point is the third or fourth OFDM symbol in the slot. POSITIONING BASED ON LATERAL LINKAGE

[00116] In 3GPP R-17, the 3GPP RAN researches “NR positioning enhancement” and “NR positioning case scenarios and requirements within a canopy, partially within a canopy, and beyond a canopy.” The “NR positioning case scenarios and requirements within a canopy, partially within a canopy, and outside a canopy” focus on V2X and public safety cases. Additionally, the 3GPP SA1 working group also formulated the requirements for Petition 870250091864, dated 08 / 10 / 2025, pages 135 / 205 29 / 80 “reach-based services” and established the positioning accuracy requirements for the Industrial Internet of Things (IoT) beyond coverage. 3GPP must research and develop side-link positioning solutions to support the cases, scenarios, and requirements identified in the activities.

[00117] 3GPP conducts positioning feasibility and performance research based on SPRS in the initial stage of Rel-18 to improve positioning accuracy, especially the positioning of a UE beyond cellular network coverage. Subsequently, the side-link positioning solution (including range / orientation) in the NR system is standardized.

[00118] On the sideline, different UEs transmit the SL PRS occupying different time and frequency resources, and how to multiplex the PSCCH indicating the transmission of the SL PRS is an unresolved problem. In this case, the following embodiments of the present application provide a solution, which is elaborated in detail hereafter in this document. Furthermore, in the present disclosure, unless otherwise indicated, all indices / numbers are counted from 0.

[00119] With reference to Figure 12, Figure 12 is a flowchart of a method for resource mapping according to some embodiments of the present disclosure. The method is applicable to the network architecture illustrated in Figure 1, and is performed by a terminal device. The method is applicable to licensed and unlicensed spectrum. The method includes at least one of the following processes.

[00120] In S1210, a terminal device maps Petition 870250091864, dated 08 / 10 / 2025, p. 136 / 205 30 / 80 second-stage SCI modulation symbols for a time-frequency feature, where the second-stage SCI indicates at least the transmission of an SL PRS.

[00121] The modulation symbols of the second-stage SCI are acquired by modulating the second-stage SCI.

[00122] In some modes, the second-stage SCI indicates only the transmission of the SL PRS.

[00123] In some modes, the second-stage SCI indicates transmission of the SL PRS and other content. Illustratively, the second-stage SCI indicates transmission of the SL PRS and SL PRS configuration information. Illustratively, the second-stage SCI indicates transmission of the SL PRS and HARQ feedback information.

[00124] In some embodiments, the second-stage SCI modulation symbols are mapped to a time-frequency feature of the PSSCH. That is, the second-stage SCI modulation symbols are mapped to REs in the PSSCH.

[00125] In some embodiments, the second-stage SCI modulation symbols are mapped to unoccupied REs. Unoccupied REs refer to REs to which no information is mapped.

[00126] In some embodiments, the second-stage SCI modulation symbols are mapped to REs not occupied by at least one of the following: the PSSCH DMRS, the SL PRS, the PSCCH, the PSCCH DMRS, or the PT-RS. Illustratively, the second-stage SCI modulation symbols are mapped to REs not occupied by the PSSCH DMRS; that is, the second-stage SCI and PSSCH DMRS modulation symbols are not simultaneously mapped to an RE. Petition 870250091864, dated 08 / 10 / 2025, pp. 137 / 205 31 / 80 modulation symbols of the second-stage SCI are not mapped to REs to which the PSSCH DMRS is mapped. Illustratively, the modulation symbols of the second-stage SCI are mapped to REs not occupied by the PSSCH DMRS and the SL PRS; that is, the modulation symbols of the second-stage SCI are not mapped to REs occupied by the PSSCH DMRS and / or the SL PRS. It should be noted that the PT-RS in the embodiments of the present disclosure may not be present on a carrier transmitted via the SL PRS, and the PSCCH in the embodiments of the present disclosure includes the PSCCH DMRS, which are not further described herein.

[00127] In some embodiments, the second-stage SCI modulation symbols are mapped to REs not occupied by the PSSCH DMRS, the PSCCH, the PSCCH DMRS, and the PT-RS in OFDM symbols that do not contain the SL PRS. Illustratively, as shown in Figure 13, in the case where the SL PRS is mapped to a second OFDM symbol, the second-stage SCI modulation symbols are mapped to REs not occupied by the PSSCH DMRS, the PSCCH, the PSCCH DMRS, and the PT-RS in OFDM symbols that do not contain the SL PRS, that is, the second-stage SCI modulation symbols are mapped to REs not occupied by the PSSCH DMRS, the PSCCH, the PSCCH DMRS, and the PT-RS in OFDM symbols that are not the second OFDM symbol.The REs not occupied by the DMRS of PSSCH, PSCCH, DMRS of PSCCH and PT-RS refer to REs not occupied by any one or more of the DMRS of PSSCH, PSCCH, DMRS of PSCCH and PT-RS, that is, REs for which none of the DMRS of PSSCH, PSCCH, DMRS of PSCCH and PT-RS is mapped.

[00128] In some sports, the SL PRS is Petition 870250091864, dated 08 / 10 / 2025, p. 138 / 205 32 / 80 mapped to REs not occupied by PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS in OFDM symbols that do not contain the SL PRS. Illustratively, as shown in Figure 13, in a case where the PSCCH DMRS is mapped to the first symbol, the sixth symbol, and the eleventh symbol, the SL PRS is mapped to REs not occupied by PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS in OFDM symbols that do not contain the SL PRS, that is, the SL PRS is mapped to REs not occupied by PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS in OFDM symbols other than the first symbol, the sixth symbol, and the eleventh symbol.The REs not occupied by PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS refer to REs not occupied by any one or more of the PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS; that is, REs for which none of the PSCCH, PSCCH DMRS, second-stage SCI, and PT-RS are mapped.

[00129] In some embodiments, the SL PRS is mapped to OFDM symbols that do not contain at least one of the PSSCH DMRS, the PSCCH, or the second-stage SCI. Illustratively, as shown in Figure 13, the PSSCH DMRS is mapped to the first symbol, the sixth symbol, and the eleventh symbol; the PSCCH is mapped to the first symbol, the second symbol, and the third symbol; the SL PRS is mapped to OFDM symbols that do not contain at least one of the PSSCH DMRS, the PSCCH, or the second-stage SCI; in the case where the second-stage SCI is mapped to the first symbol, the second symbol, the third symbol, and the fourth symbol, that is, the SL PRS is mapped to OFDM symbols. Petition 870250091864, dated 08 / 10 / 2025, pp. 139 / 205 33 / 80 different from the first symbol, the second symbol, the third symbol and the fourth symbol, the sixth symbol and the eleventh symbol.

[00130] In some embodiments, the SL PRS is mapped to REs not occupied by at least one of the following: the PSSCH DMRS, the second-stage SCI, the PSCCH, the PSCCH DMRS, or the PT-RS. Illustratively, the SL PRS is mapped to REs not occupied by the PSSCH DMRS, that is, the SL PRS and the PSSCH DMRS are not simultaneously mapped to an RE; the SL PRS is not mapped to REs to which the PSSCH DMRS is mapped. Illustratively, the SL PRS is mapped to REs not occupied by the PSSCH DMRS and the second-stage SCI, that is, the SL PRS is not mapped to REs occupied by the PSSCH DMRS and / or the second-stage SCI.

[00131] Rate matching refers to a digital domain processing procedure for aligning a number of encoded bits with an actual number of available transmission resources. In embodiments of the present disclosure, a rate matching mechanism is adopted to align a quantity of second-stage SCI modulation symbols with the actual number of available transmission resources.

[00132] In some embodiments, a second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI to a first-ofDM symbol in the first-ofDM mapping symbol. Illustratively, as shown in Figure 13, the second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols Petition 870250091864, dated 08 / 10 / 2025, pages 140 / 205 34 / 80 stage modulation symbols occupy all available REs for mapping the second-stage SCI on any mapping OFDM symbol. After a final second-stage SCI modulation symbol is mapped, in a case where an OFDM symbol includes an RE that satisfies the SL PRS mapping and is not a first OFDM symbol to which the second-stage SCI modulation symbols are mapped, the SL PRS is still mapped to the OFDM symbol. For example, the second-stage SCI modulation symbols are mapped from the first OFDM symbol to the fourth OFDM symbol, and the rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI on the first OFDM symbol.After the second-stage SCI modulation symbols are mapped, in a case where the fourth OFDM symbol still includes an RE available for mapping the SL PRS, the SL PRS is still mapped to the fourth OFDM symbol.

[00133] In some embodiments, a second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI to any OFDM symbol, so that a code rate is reduced. Illustratively, as shown in Figure 13, the second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI to any OFDM symbol to which the second-stage SCI is mapped. By Petition 870250091864, dated 08 / 10 / 2025, pp. 141 / 205 35 / 80 example, the second-stage SCI modulation symbols are mapped from the first OFDM symbol to the fourth OFDM symbol, and the rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI on the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol.

[00134] In some embodiments, if the second-stage SCI modulation symbols determined based on a second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied, the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that must be occupied.

[00135] The OFDM symbols that must be occupied include at least one of: the first OFDM symbol, the OFDM symbol containing PSCCH, the OFDM symbol containing PSSCH DMRS, or the OFDM symbol containing PSCCH and the OFDM symbol containing PSSCH DMRS.

[00136] In some embodiments, in a case where a PSSCH DMRS or a PSCCH DMRS is determined as a reference signal to measure a received SL reference signal power (RSRP) in a resource cluster in a resource monitoring process, the terminal device transmits the PSSCH DMRS. Illustratively, in a case where a PSSCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device Petition 870250091864, dated 08 / 10 / 2025, pp. 142 / 205 36 / 80 transmits the PSSCH DMRS; or, in a case where a PSCCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device transmits the PSSCH DMRS.

[00137] In some embodiments, the terminal device transmits all PSSCH DMRSs in a selected PSSCH DMRS pattern.

[00138] The PSSCH DMRS pattern refers to a PSSCH DMRS position on an OFDM symbol in a slot, and the PSSCH DMRS patterns are determined based on Table 2, which are not enumerated in the present disclosure.

[00139] In some embodiments, regardless of whether the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in the resource clustering in the resource monitoring process, the terminal device transmits all PSSCH DMRSs in the selected PSSCH DMRS pattern, so that the accuracy of the channel estimate is improved.

[00140] In some embodiments, in a case where a PSSCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device transmits part of the PSSCH DMRSs in a selected PSSCH DMRS pattern, so that the time-frequency resources occupied by the PSSCH DMRSs are reduced.

[00141] In some embodiments, the REs available for PSSCH, PSCCH, PSSCH DMRS, PT-RS or SL PRS in the first OFDM symbol must be duplicated for an OFDM symbol before the first OFDM symbol. That is, the Petition 870250091864, dated 08 / 10 / 2025, p. 143 / 205 37 / 80 The information carried in the OFDM symbol before the first OFDM symbol is the same as the information carried in the first OFDM symbol. Illustratively, as shown in Figure 13, the REs available for PSSCH, PSCCH, PSSCH DMRS, PT-RS, or SL PRS in the first OFDM symbol need to be duplicated for a 0th OFDM symbol (the AGC). That is, the information carried in the 0th OFDM symbol is the same as the information carried in the first OFDM symbol.

[00142] In some modes, the second-stage SCI is mapped first to the OFDM symbols and then the SL PRS is mapped to the OFDM symbols.

[00143] In some modes, the SL PRS is first mapped to the OFDM symbols and then the second-stage SCI is mapped to the OFDM symbols.

[00144] In some implementations, methods for mapping the second-stage SCI modulation symbols to time-frequency features are described in several exemplary implementations.

[00145] In some embodiments, the second-stage SCI modulation symbols are mapped from a first OFDM symbol that contains a PSSCH DMRS.

[00146] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of at least one virtual resource block allocated from the first OFDM symbol containing the PSSCH DMRS according to an ascending order of indices.

[00147] In some modalities, the symbols of Petition 870250091864, dated 08 / 10 / 2025, pages 144 / 205 38 / 80 second-stage SCI modulations are at least mapped to all OFDM symbols that contain a PSCCH.

[00148] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a frequency domain first and then time domain sequence, to REs of at least one virtual resource block allocated from a first OFDM symbol containing the PSCCH according to an ascending order of indices.

[00149] In some embodiments, the terminal device expects a resource grouping to be configured with at least one PSSCH DMRS pattern with a PSSCH DMRS present in a first OFDM symbol, and the terminal device selects the PSSCH DMRS pattern with a PSSCH DMRS present in the first OFDM symbol. For example, the terminal device selects the PSSCH DMRS patterns with the PSSCH DMRS present in the first OFDM symbol, the sixth OFDM symbol, and the eleventh OFDM symbol. For example, the terminal device selects the PSSCH DMRS patterns with the PSSCH DMRS present in the first OFDM symbol, the fourth OFDM symbol, the seventh OFDM symbol, and the tenth OFDM symbol. For example, the terminal device does not select the PSSCH DMRS patterns with the PSSCH DMRS present in the third OFDM symbol and the tenth OFDM symbol.

[00150] In some embodiments, in a case where a first OFDM symbol does not contain a PSSCH DMRS, the second-stage SCI modulation symbols are at least mapped to an OFDM symbol that contains a PSSCH DMRS pattern. Petition 870250091864, dated 08 / 10 / 2025, pages 145 / 205 39 / 80

[00151] In some embodiments, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols that contain a PSSCH DMRS.

[00152] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

[00153] In some embodiments, in a case where the number of second-stage SCI modulation symbols is greater than the number of REs available for mapping the second-stage SCI to the OFDM symbols containing the PSSCH DMRS, the remaining second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of at least one allocated virtual resource block from a first OFDM symbol that does not contain the PSSCH DMRS according to an ascending order of indices.

[00154] In some embodiments, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols containing a PSCCH and all OFDM symbols containing a PSSCH DMRS.

[00155] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols that contain the PSSCH DMRS in at least one block of Petition 870250091864, dated 08 / 10 / 2025, pages 146 / 205 40 / 80 virtual resources allocated from a first OFDM symbol that contains the DMRS of PSSCH according to an ascending order of indices, and then mapped sequentially, in the sequence of first the frequency domain and then the time domain, to REs of at least one block of virtual resources allocated from a first OFDM symbol that does not contain the DMRS of PSSCH and contains the PSCCH according to the ascending order of indices.

[00156] In some embodiments, the modulation symbols of the second-stage SCI are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to the REs of at least one virtual resource block allocated from a first OFDM symbol that contains the PSCCH according to an increasing order of indices, and then are mapped, in the sequence of first the frequency domain and then the time domain, to the REs of the OFDM symbols that contain the DMRS of PSSCH in at least one virtual resource block allocated from a first OFDM symbol that does not contain the PSCCH, but contains the DMRS of PSSCH according to the increasing order of indices.

[00157] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS and / or the PSCCH according to an increasing order of indices.

[00158] In some modalities, the symbols of Petition 870250091864, dated 08 / 10 / 2025, pages 147 / 205 41 / 80 second-stage SCI modulations are mapped only to OFDM symbols that contain a PSSCH DMRS.

[00159] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

[00160] In some embodiments, a modulation mode of the second-stage SCI modulation symbols is determined based on an SL PRS comb size.

[00161] In some embodiments, in a case where the SL PRS comb size is greater than 2, the second-stage SCI modulation symbols are mapped to REs not occupied by the SL PRS in OFDM symbols that contain the SL PRS.

[00162] In some embodiments, in a case where the SL PRS comb size is equal to 2, the second-stage SCI modulation symbols are mapped to REs not occupied by the SL PRS and the PSSCH DMRS.

[00163] In some embodiments, in a case where the SL PRS comb size is equal to 1, the second-stage SCI modulation symbols are mapped to OFDM symbols that contain the PSSCH DMRS.

[00164] In the solutions of the technique according to the embodiments of the present disclosure, the second-stage SCI used to indicate the transmission of the SL PRS is mapped to the allocated time-frequency resource. In a case where the PRS Petition 870250091864, dated 08 / 10 / 2025, p. 148 / 205 42 / 80 of SL and the second-stage SCI are transmitted in the shared resource pool, the second-stage SCI is effectively received, and the effect on the resource selection of the receiving terminal device is reduced.

[00165] The various exemplary embodiments of methods for mapping second-stage SCI modulation symbols to time-frequency features are described in detail in the present disclosure.

[00166] First, the second-stage SCI modulation symbols are mapped from a first OFDM symbol that contains a PSSCH DMRS.

[00167] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in the sequence of first the frequency domain and then the time domain, to REs of at least one allocated virtual resource block from the first OFDM symbol containing the PSSCH DMRS according to the ascending order of the indices.

[00168] In some embodiments, the method in the embodiments is executed based on the premise that the terminal device transmits the PSSCH DMRS in a case where the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal to measure an SL RSRP in the resource cluster in the resource monitoring process.

[00169] That is, it doesn't matter whether the DMRS of PSSCH or the DMRS of PSCCH is determined as the reference signal for measuring the RSRP of SL in the resource clustering in the resource monitoring process, the terminal device transmits the DMRS of PSSCH.

[00170] In some forms, the device Petition 870250091864, dated 08 / 10 / 2025, p. 149 / 205 The 43 / 80 terminal transmits all PSSCH DMRSs in the selected PSSCH DMRS standard, thus improving the accuracy of the channel estimate.

[00171] In some embodiments, in a case where the PSSCH DMRS is determined as the reference signal for measuring the SL RSRP in resource clustering in the resource monitoring process, the terminal device transmits part of the DMRSs in the selected PSSCH DMRS pattern, so that the time-frequency resources occupied by the PSSCH DMRSs are reduced.

[00172] Illustratively, in a case where the DMRS patterns of PSSCH selected by the terminal device include DMRS patterns of PSSCH with three OFDM symbols, the terminal device transmits DMRS patterns of PSSCH with one or two of the three OFDM symbols, or it transmits DMRS patterns of PSSCH with all three OFDM symbols.

[00173] (1) The terminal device first maps the second-stage SCI and then maps the SL PRS.

[00174] The terminal device sequentially maps, in the order of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs of at least one allocated virtual resource block starting from the first OFDM symbol containing the PSSCH DMRS according to the ascending order of the indices. The second-stage SCI modulation symbols are mapped to REs not occupied by at least one of the following: PSSCH DMRS, PSCCH, PSCCH DMRS, or PT-RS.

[00175] In some embodiments, the PSSCH carries only the second-stage SCI, and the mechanism of Petition 870250091864, dated 08 / 10 / 2025, pages 150 / 205 44 / 80 second-stage SCI rate matching is at least one of:

[00176] 1. The second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI to a first OFDM symbol in the first mapping OFDM symbol. As illustrated in Figure 14, in the case where the second-stage SCI modulation symbols are mapped by the following process, the last second-stage SCI modulation symbol is mapped, and the OFDM symbol (the fourth OFDM symbol) of the modulation symbol contains the available RE for mapping the second-stage SCI and does not contain the PSSCH DMRS, the terminal device transmits the SL PRS in the remaining REs.

[00177] 2. The second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI to any OFDM symbol, so that a code rate is reduced. As illustrated in Figure 15, in a case where the second-stage SCI modulation symbols are mapped by the following process, after mapping the last second-stage SCI modulation symbol, the available RE for mapping the second-stage SCI to the OFDM symbol (the fourth OFDM symbol) of the modulation symbol is occupied.

[00178] 3. In a case where the second-stage SCI modulation symbols are determined based on the second-stage SCI rate matching mechanism Petition 870250091864, dated 08 / 10 / 2025, pages 151 / 205 45 / 80 do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied; the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that need to be occupied.

[00179] After the second-stage SCI is mapped, the terminal device maps the SL PRS to REs not occupied by the PSCCH and the second-stage SCI in OFDM symbols that do not contain the PSSCH DMRS.

[00180] In some embodiments, the terminal device maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the physical resource block n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00181] The virtual resource block refers to a resource allocated by a higher layer for information transmission, and the physical layer adopts the physical resource block to carry information that must be transmitted.

[00182] (2) The terminal device first maps the SL PRS and then maps the second-stage SCI.

[00183] In this case, the terminal device occupies unavailable REs for the SL PRS in the OFDM symbols containing the SL PRS and transmits the modulation symbols of the second-stage SCI, or the second-stage SCI punches the SL PRS in the OFDM symbols containing the SL PRS. Punching the second-stage SCI means that the modulation symbols of the second-stage SCI are mapped to the Petition 870250091864, dated 08 / 10 / 2025, pages 152 / 205 46 / 80 OFDM symbols containing the SL PRS, and the REs for mapping the second-stage SCI modulation symbols are not occupied by the SL PRS.

[00184] The terminal device first maps the SL PRS to at least one allocated virtual resource block and then maps the second-stage SCI modulation symbols to at least one allocated virtual resource block. The OFDM symbol to which the SL PRS is mapped, the SL PRS comb size, and the RE offset are indicated by the high-layer signaling or the first-stage SCI. High-layer signaling includes at least one of the following: configured signaling, pre-configured signaling, or signaling at a physical layer for interaction between terminal devices.

[00185] For example, the OFDM symbol to which the SL PRS is mapped includes all OFDM symbols in the allocated resource, except the OFDM symbol that contains the PSSCH DMRS, and the OFDM symbols after the first PSSCH DMRS are excluded based on the configuration or pre-configuration of the resource grouping or dynamic indication of the terminal device.

[00186] In some modes, the SL PRS is not mapped to the OFDM symbol that contains the PSSCH DMRS, the virtual resource block that contains the PSCCH, or the RE that contains the PT-RS.

[00187] After the completion of the SL PRS mapping, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the modulation symbols of the second-stage SCI to REs of at least one virtual feature block. Petition 870250091864, dated 08 / 10 / 2025, pages 153 / 205 47 / 80 allocated from the first OFDM symbol containing the PSSCH DMRS according to ascending indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by any of the PSSCH DMRS, the SL PRS, the PSCCH, the PSCCH DMRS, and the PTRS.

[00188] In some embodiments, in a case where the above resource is not efficient for carrying the second-stage SCI modulation symbols, the terminal device maps, in sequence of first the frequency domain and then the time domain, the remaining second-stage SCI modulation symbols to REs occupied by the SL PRS from an OFDM symbol N according to the ascending order of the indices. The OFDM symbol N refers to a first OFDM symbol containing the SL PRS after the first OFDM symbol containing the PSSCH DMRS.

[00189] In some embodiments, the terminal device additionally maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the physical resource block n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00190] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the receiving UE by setting a penultimate least significant bit (LSB) in the reserved bit of the 1-A SCI format as 1.

[00191] In the method above, the modulation symbols Petition 870250091864, dated 08 / 10 / 2025, pages 154 / 205 The 48 / 80 of the second-stage SCI used to indicate the transmission of the SL PRS are mapped from the first OFDM symbol containing the PSCCH DMRS, so that the second-stage SCI is effectively received in a case where the SL PRS and the second-stage SCI are transmitted in the shared resource pool, and the effect on the resource selection of the receiving terminal device is reduced. In this way, the mechanisms stipulated in the current standards are reused without the need for new mechanisms.

[00192] Secondly, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols that contain a PSCCH.

[00193] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in the sequence of first the frequency domain and then the time domain, to REs of at least one virtual resource block allocated from the first OFDM symbol containing the PSCCH according to the ascending order of the indices.

[00194] In some embodiments, the terminal device expects the resource grouping to be configured with at least one PSSCH DMRS pattern with the PSSCH DMRS present in the first OFDM symbol, and the terminal device selects the PSSCH DMRS pattern with the PSSCH DMRS present in the first OFDM symbol.

[00195] In some embodiments, in a case where a first OFDM symbol does not contain a PSSCH DMRS, the second-stage SCI modulation symbols are at least mapped to an OFDM symbol that contains a PSSCH DMRS pattern. Petition 870250091864, dated 08 / 10 / 2025, pp. 155 / 205 49 / 80

[00196] In a case where the PSSCH only carries the second-stage SCI, the second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI on any OFDM symbol and, at least, occupy all available REs for mapping the second-stage SCI on the OFDM symbol containing the PSCCH, so that the terminal device does not need to transmit the SL PRS on the OFDM symbol containing the PSCCH, and the code rate is reduced. As illustrated in Figure 16, the second-stage SCI modulation symbols occupy all available REs for mapping the second-stage SCI on the OFDM symbols (the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol) containing the PSCCH, so the terminal device does not need to transmit the SL PRS on the OFDM symbol containing the PSCCH.

[00197] In a case where the second-stage SCI modulation symbols determined based on the second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied, the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that need to be occupied. That is, in a case where the second-stage SCI modulation symbols do not completely occupy all available REs for the second-stage SCI on the OFDM symbols containing the PSCCH, the terminal device repeatedly maps the second-stage SCI to the REs Petition 870250091864, dated 08 / 10 / 2025, pages 156 / 205 50 / 80 remaining until all available REs for the second-stage SCI on the OFDM symbols containing the PSCCH are completely occupied. As illustrated in Figure 16, in a case where the modulation symbols of the second-stage SCI do not completely occupy all available REs for the second-stage SCI on the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol, the terminal device repeatedly maps the second-stage SCI to the remaining REs until all available REs for the second-stage SCI on the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol are completely occupied.

[00198] (1) In a case where the PSSCH DMRS is determined as the reference signal to measure the SL RSRP in the resource cluster, the terminal device transmits the PSSCH DMRS. That is, in a case where a PSCCH DMRS is determined as the reference signal to measure the SL RSRP in the resource cluster in the resource monitoring process, the terminal device does not transmit the PSSCH DMRS.

[00199] In some embodiments, the terminal device first maps the SL PRS and then maps the second-stage SCI.

[00200] The terminal device first maps the SL PRS to at least one allocated virtual resource block and then maps the second-stage SCI modulation symbols to at least one allocated virtual resource block. The OFDM symbol to which the SL PRS is mapped does not include the OFDM symbol containing the PSSCH DMRS and the OFDM symbol containing the PSCCH. In some implementations, the SL PRS comb size and RE offset are Petition 870250091864, dated 08 / 10 / 2025, pages 157 / 205 51 / 80 indicated by high-layer signaling or first-stage SCI. High-layer signaling includes at least one of the following: configured signaling, pre-configured signaling, or signaling at the physical layer for interaction between terminal devices.

[00201] In some modes, the SL PRS is not mapped to the RE that contains the PT-RS.

[00202] After the completion of the SL PRS mapping, the terminal device sequentially maps, first in the frequency domain and then in the time domain, the second-stage SCI modulation symbols to the REs of at least one allocated virtual resource block starting from the first OFDM symbol (i.e., the first OFDM symbol containing the PSCCH) according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS, the SL PRS, or the PT-RS.

[00203] In some embodiments, the terminal device maps the second-stage SCI modulation symbols to REs not occupied by the SL PRS in the OFDM symbols that contain the SL PRS.

[00204] In some embodiments, the terminal device additionally maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the physical resource block n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00205] In the modalities, the terminal device Petition 870250091864, dated 08 / 10 / 2025, pages 158 / 205 The 52 / 80 receiver demodulates the second-stage SCI using SL PRS and / or PSSCH DMRS.

[00206] (2) Regardless of whether the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in the resource cluster in the resource monitoring process, the terminal device transmits the PSSCH DMRSs.

[00207] In some embodiments, the terminal device transmits all PSSCH DMRSs in the selected PSSCH DMRS standard, so that the accuracy of the channel estimate is improved.

[00208] In some embodiments, in a case where a PSSCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device transmits part of the PSSCH DMRSs in a selected PSSCH DMRS pattern, so that the time-frequency resources occupied by the PSSCH DMRSs are reduced.

[00209] Illustratively, in a case where the DMRS patterns of PSSCH selected by the terminal device include DMRS patterns of PSSCH with three OFDM symbols, the terminal device transmits DMRS patterns of PSSCH with one or two of the three OFDM symbols, or it transmits DMRS patterns of PSSCH with all three OFDM symbols.

[00210] In some embodiments, the terminal device first maps the second-stage SCI and then maps the SL PRS.

[00211] The terminal device sequentially maps, in the order of the first frequency domain and then the time domain, the SCI modulation symbols of Petition 870250091864, dated 08 / 10 / 2025, pages 159 / 205 53 / 80 second stage for the REs of at least one allocated virtual resource block, starting from the first OFDM symbol (i.e., the first OFDM symbol containing PSCCH) according to the ascending order of the indices. The REs for mapping the second stage SCI modulation symbols are not occupied by at least one of the following: DMRS of PSSCH, PSCCH, DMRS PSCCH, PRS of SL, or PT-RS.

[00212] After the second-stage SCI is mapped, the terminal device begins mapping the SL PRS. The OFDM symbols to which the SL PRS is mapped do not include the OFDM symbol containing the PSSCH DMRS, the OFDM symbol containing the PSCCH, and the OFDM symbol containing the second-stage SCI, so that transmission of signals with different power spectral densities on the same OFDM symbol by the terminal device is avoided.

[00213] In some embodiments, the terminal device first maps the SL PRS and then maps the second-stage SCI.

[00214] The terminal device first maps the SL PRS to at least one allocated virtual resource block. The OFDM symbol to which the SL PRS is mapped does not include at least one of the OFDM symbols containing the PSSCH DMRS or the OFDM symbol containing the PSCCH. In some implementations, the SL PRS comb size and RE offset are indicated by high-layer signaling or first-stage SCI. High-layer signaling includes at least one of: configured signaling, pre-configured signaling, or signaling at the physical layer for interaction between terminal devices.

[00215] After completion of the PRS mapping of Petition 870250091864, dated 08 / 10 / 2025, pages 160 / 205 54 / 80 SL, the terminal device sequentially maps, first in the frequency domain and then in the time domain, the second-stage SCI modulation symbols to the REs of at least one allocated virtual resource block starting from the first OFDM symbol (i.e., the first OFDM symbol containing PSCCH) according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the following: PSSCH DMRS, PSCCH, PSCCH DMRS, SL PRS, or PT-RS.

[00216] In some embodiments, the OFDM symbols to which the second-stage SCI modulation symbols are mapped do not include the SL PRS, so that signal transmission with different power spectral densities on the same OFDM symbol by the terminal device is avoided.

[00217] In some embodiments, the terminal device additionally maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the physical resource block n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00218] In some embodiments, the terminal device expects the resource grouping to be configured with at least one PSSCH DMRS pattern with the PSSCH DMRS present in the first OFDM symbol, and the terminal device selects the PSSCH DMRS pattern with the PSSCH DMRS present in the first OFDM symbol.

[00219] In some modalities, in a case where Petition 870250091864, dated 08 / 10 / 2025, pages 161 / 205 55 / 80 a first OFDM symbol does not contain a PSSCH DMRS, the second-stage SCI occupies at least one OFDM symbol that contains the PSSCH DMRS pattern.

[00220] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the receiving UE by setting a penultimate LSB in the reserved bit of the SCI 1-A format to 1.

[00221] In the above method, the modulation symbols of the second-stage SCI used to indicate the transmission of the SL PRS are at least mapped to all OFDM symbols containing the PSCCH, so that the second-stage SCI is effectively received in one where the SL PRS and the second-stage SCI are transmitted in the shared resource grouping, and the effect on the resource selection of the receiving terminal device is reduced. Furthermore, frequency-division multiplexing of the second-stage SCI and the PSCCH avoids frequency-division multiplexing of the SL PRS and the PSCCH.

[00222] Thirdly, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols that contain a PSSCH DMRS.

[00223] Regardless of whether the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in the resource clustering process during resource monitoring, the terminal device transmits the PSSCH DMRSs.

[00224] In some embodiments, the terminal device transmits all DMRSs from PSSCH in the DMRS standard. Petition 870250091864, dated 08 / 10 / 2025, pages 162 / 205 56 / 80 of PSSCH selected, so that the accuracy of the channel estimate is improved.

[00225] In some embodiments, in a case where the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in resource clustering in the resource monitoring process, the terminal device transmits part of the PSCCH DMRSs in the selected PSCCH DMRS pattern, so that the time-frequency resources occupied by the PSCCH DMRSs are reduced.

[00226] Illustratively, in a case where the DMRS patterns of PSSCH selected by the terminal device include DMRS patterns of PSSCH with three OFDM symbols, the terminal device transmits DMRS patterns of PSSCH with one or two of the three OFDM symbols, or it transmits DMRS patterns of PSSCH with all three OFDM symbols.

[00227] In some embodiments, the terminal device first maps the second-stage SCI and then maps the SL PRS.

[00228] The terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from the first OFDM symbol containing the PSSCH DMRS according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS or the PT-RS.

[00229] In some versions, in a case where the Petition 870250091864, dated 08 / 10 / 2025, pages 163 / 205 57 / 80 PSSCH only carries the second-stage SCI; the second-stage SCI rate matching mechanism ensures that the number of second-stage SCI modulation symbols is greater than or equal to the number of REs available for mapping the second-stage SCI onto the OFDM symbols containing the PSSCH DMRS.

[00230] In some embodiments, in a case where the second-stage SCI modulation symbols determined based on the second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied, the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that need to be occupied. That is, in a case where the second-stage SCI modulation symbols do not completely occupy all available REs for the second-stage SCI on OFDM symbols containing the PSSCH DMRS, the terminal device repeatedly maps the second-stage SCI to the remaining REs until all available REs for the second-stage SCI on the OFDM symbols containing the PSSCH DMRS are completely occupied.

[00231] In some embodiments, in a case where the number of second-stage SCI modulation symbols is greater than the number of REs available for mapping the second-stage SCI onto the OFDM symbols containing the PSSCH DMRS, the terminal device maps the second-stage SCI modulation symbols sequentially, in the sequence of first the frequency domain and then the time domain. Petition 870250091864, dated 08 / 10 / 2025, pages 164 / 205 58 / 80 stage for the REs in at least one virtual resource block allocated from the first OFDM symbol that does not contain the PSSCH DMRS according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS, or the PT-RS. As illustrated in Figure 17, in the case where the number of second-stage SCI modulation symbols is greater than the number of REs available for mapping the second-stage SCI to the OFDM symbols containing the PSSCH DMRS, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs in at least one virtual resource block allocated from the second OFDM symbol, according to the ascending order of the indices.

[00232] In some embodiments, the terminal device additionally maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the physical resource block n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00233] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the receiving UE by setting a penultimate LSB in the reserved bit of the SCI 1-A format to 1.

[00234] In the method above, the second-stage SCI modulation symbols used to indicate the transmission of Petition 870250091864, dated 08 / 10 / 2025, pages 165 / 205 59 / 80 SL PRSs are at least mapped to all OFDM symbols that contain the PSSCH DMRS, so that the second-stage SCI is effectively received in a case where the SL PRS and the second-stage SCI are transmitted in the shared resource pool, and the effect on the receiving terminal device's resource selection is reduced.

[00235] Fourthly, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols containing a PSCCH and all OFDM symbols containing a PSSCH DMRS.

[00236] In the embodiments, the second-stage SCI modulation symbols are mapped at least to UEs of the OFDM symbols containing PSCCH and the OFDM symbols containing PSSCH DMRS, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, PSCCH, PSCCH DMRS or PT-RS.

[00237] In some embodiments, the second-stage SCI rate matching mechanism ensures that the number of second-stage SCI modulation symbols is greater than or equal to the number of REs available for mapping the second-stage SCI onto the OFDM symbols containing PSCCH and the OFDM symbols containing PSSCH DMRS.

[00238] In some embodiments, in a case where the second-stage SCI modulation symbols determined based on the second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI to OFDM symbols that need to be occupied, the symbols of Petition 870250091864, dated 08 / 10 / 2025, pp. 166 / 205 60 / 80 modulation of the second-stage SCI is repeatedly mapped to unoccupied REs available for mapping the second-stage SCI on the OFDM symbols that need to be occupied. That is, in a case where the modulation symbols of the second-stage SCI do not completely occupy all the REs available for the second-stage SCI on the OFDM symbols containing the PSCCH DMRS and on the OFDM symbols containing the PSSCH DMRS, the terminal device repeatedly maps the second-stage SCI to the remaining REs until all the REs available for the second-stage SCI on the OFDM symbols containing the PSCCH DMRS and on the OFDM symbols containing the PSSCH DMRS are completely occupied.

[00239] Regardless of whether the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in the resource clustering process during resource monitoring, the terminal device transmits the PSSCH DMRSs.

[00240] In some embodiments, the terminal device transmits all PSSCH DMRSs in the selected PSSCH DMRS standard, so that the accuracy of the channel estimate is improved.

[00241] In some embodiments, in a case where the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in resource clustering in the resource monitoring process, the terminal device transmits part of the PSCCH DMRSs in the selected PSCCH DMRS pattern, so that the time-frequency resources occupied by the PSCCH DMRSs are reduced.

[00242] Illustratively, in a case where the DMRS standards of PSSCH are selected by the terminal device Petition 870250091864, dated 08 / 10 / 2025, pages 167 / 205 61 / 80 includes three OFDM symbol PSSCH DMRS patterns; the terminal device transmits one or two of the three OFDM symbol PSSCH DMRS patterns, or it transmits all three OFDM symbol PSSCH DMRS patterns.

[00243] In some embodiments, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from the first OFDM symbol containing the PSSCH DMRS in ascending order of indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS or the PT-RS.Then, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs in at least one allocated virtual resource block that contains the PSCCH starting from the first OFDM symbol that does not contain the PSSCH DMRS, but does contain the PSCCH, according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS, or the PT-RS.

[00244] In some embodiments, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs in at least one virtual resource block allocated from the first OFDM symbol according to the ascending order of the indices. Petition 870250091864, dated 08 / 10 / 2025, pages 168 / 205 62 / 80 The OFDM symbols to which the second-stage SCI modulation symbols are mapped include PSCCH and / or PSSCH DMRS, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of PSSCH DMRS, PSCCH, PSCCH DMRS, or PT-RS.

[00245] In some embodiments, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to the REs of the OFDM symbols containing the PSCCH in at least one virtual resource block allocated from the first OFDM symbol containing the PSCCH according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS or the PT-RS.Then, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to the REs in at least one allocated virtual resource block that contains the PSSCH DMRS, starting from the first OFDM symbol that does not contain the PSCCH but does contain the PSSCH DMRS, according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the following: PSSCH DMRS, PSCCH, PSCCH DMRS, or PT-RS.

[00246] In some embodiments, the terminal device additionally maps the virtual resource block to the physical resource block in a non-interleaved mode. That is, the virtual resource block n is mapped to the block Petition 870250091864, dated 08 / 10 / 2025, pages 169 / 205 63 / 80 of physical resources n. n represents an index of the virtual resource block or the physical resource block, en is an integer greater than or equal to 0.

[00247] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the receiving UE by setting a penultimate LSB in the reserved bit of the SCI 1-A format to 1.

[00248] In the above method, the modulation symbols of the second-stage SCI used to indicate the transmission of the SL PRS are at least mapped to all OFDM symbols containing the PSCCH DMRS and all OFDM symbols containing the PSSCH DMRS, so that the second-stage SCI is effectively received in a case where the SL PRS and the second-stage SCI are transmitted in the shared resource grouping, and the effect on the resource selection of the receiving terminal device is reduced.

[00249] Fifth, the second-stage SCI modulation symbols are mapped only to OFDM symbols that contain a PSSCH DMRS.

[00250] Regardless of whether the PSSCH DMRS or the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in the resource clustering process during resource monitoring, the terminal device transmits the PSSCH DMRSs.

[00251] In some embodiments, the terminal device transmits all PSSCH DMRSs in the selected PSSCH DMRS standard, so that the accuracy of the channel estimate is improved. Petition 870250091864, dated 08 / 10 / 2025, pages 170 / 205 64 / 80

[00252] In some embodiments, in a case where the PSCCH DMRS is determined as the reference signal for measuring the SL RSRP in resource clustering in the resource monitoring process, the terminal device transmits part of the PSCCH DMRSs in the selected PSCCH DMRS pattern, so that the time-frequency resources occupied by the PSCCH DMRSs are reduced.

[00253] Illustratively, in a case where the DMRS patterns of PSSCH selected by the terminal device include DMRS patterns of PSSCH with three OFDM symbols, the terminal device transmits DMRS patterns of PSSCH with one or two of the three OFDM symbols, or it transmits DMRS patterns of PSSCH with all three OFDM symbols.

[00254] In some embodiments, the terminal device first maps the second-stage SCI and then maps the SL PRS.

[00255] The terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from the first OFDM symbol containing the PSSCH DMRS according to ascending indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, PSCCH, PSCCH DMRS, or PT-RS. The second-stage SCI rate matching mechanism ensures that the second-stage SCI modulation symbols occupy all REs available for second-stage SCI mapping in any OFDM symbol in Petition 870250091864, dated 08 / 10 / 2025, pp. 171 / 205 65 / 80 any mapping OFDM symbol. As illustrated in Figure 18, the terminal device maps the second-stage SCI to the first OFDM symbol, the sixth OFDM symbol, and the eleventh OFDM symbol, and the second-stage SCI rate matching mechanism ensures that the modulation symbols of the second-stage SCI occupy all available REs for mapping the second-stage SCI to the first OFDM symbol, the sixth OFDM symbol, and the eleventh OFDM symbol.

[00256] In some embodiments, in a case where the second-stage SCI modulation symbols determined based on the second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied, the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that need to be occupied. That is, in a case where the second-stage SCI modulation symbols do not completely occupy all available REs for the second-stage SCI on OFDM symbols containing the PSSCH DMRS, the terminal device repeatedly maps the second-stage SCI to the remaining REs until all available REs for the second-stage SCI on the OFDM symbols containing the PSSCH DMRS are completely occupied.

[00257] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the UE receiver. Petition 870250091864, dated 08 / 10 / 2025, pages 172 / 205 66 / 80 defining the second-to-last LSB in the reserved bit of the SCI 1-A format as 1.

[00258] In the above method, the modulation symbols of the second-stage SCI used to indicate the transmission of the SL PRS are mapped to the OFDM symbols that contain the PSSCH DMRS, so that the second-stage SCI is effectively received in a case where the SL PRS and the second-stage SCI are transmitted in the shared resource grouping, and the effect on the resource selection of the receiving terminal device is reduced.

[00259] Sixthly, a modulation mode of the second-stage SCI modulation symbols is determined based on an SL PRS comb size.

[00260] In the modalities, the terminal device first maps the SL PRS and then maps the second-stage SCI, and the modulation mode of the second-stage SCI modulation symbols by the terminal device is correlated with the size of the SL PRS comb.

[00261] In some embodiments, in a case where the SL PRS comb size is greater than 2, the second-stage SCI modulation symbols are mapped to REs in OFDM symbols containing the SL PRS, occupying RE offsets different from those used by the SL PRS. Illustratively, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs corresponding to the RE offset n1 in the OFDM symbols containing the SL PRS in at least one allocated virtual resource block, starting from the first OFDM symbol containing the Petition 870250091864, dated 08 / 10 / 2025, pages 173 / 205 67 / 80 PRS of SL according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the following: DMRS of PSSCH, PSCCH, DMRS of PSCCH, PRS of SL, or PT-RS.

[00262] In some embodiments, in a case where any second-stage SCI modulation symbol remains after the processes are performed, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to the REs corresponding to the n2 RE offset in the OFDM symbols containing the SL PRS in at least one allocated virtual resource block, starting from the first OFDM symbol containing the SL PRS according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, PSCCH DMRS, PSCCH PRS or PT-RS, and so on until all second-stage SCI modulation symbols are mapped to the virtual resource block.

[00263] In some embodiments, the terminal device determines values ​​of nl, n2, ..., nk based on a value of m, and nl, n2, ..., nk are not equal to m. m is an RE offset of the SL PRS in the OFDM symbol.

[00264] For illustrative purposes, nl is determined by: nl — mod

[00265] For illustrative purposes, n2 is determined by: Petition 870250091864, dated 08 / 10 / 2025, pp. 174 / 205 68 / 80 πτι2

[00266] N represents the SL PRS comb size, m represents an RE offset of the SL PRS, and n1 and n2 represent RE offsets of the second-stage SCI modulation symbol.

[00267] In some embodiments, in a case where the SL PRS comb size is equal to 2, the second-stage SCI modulation symbols are mapped to REs not occupied by the SL PRS and the PSSCH DMRS. Illustratively, the terminal device sequentially maps, in the sequence of first the frequency domain and then the time domain, the second-stage SCI modulation symbols to REs in at least one virtual resource block allocated from the first OFDM symbol containing the SL PRS according to the ascending order of the indices, and the REs to which the second-stage SCI modulation symbols are mapped are not occupied by at least one of the PSSCH DMRS, the PSCCH, the PSCCH DMRS, the SL PRS, or the PT-RS.

[00268] In some embodiments, in a case where the SL PRS comb size is equal to 1, the second-stage SCI modulation symbols are mapped to OFDM symbols that contain the PSSCH DMRS.

[00269] In some embodiments, in a case where the SL PRS comb size is equal to 1, the SL PRS is mapped from the first OFDM symbol containing the PSSCH DMRS in the frequency domain sequence to the time domain, and the second-stage SCI punches the SL PRS into the OFDM symbols containing the SL PRS.

[00270] Second-stage ICS drilling Petition 870250091864, dated 08 / 10 / 2025, pp. 175 / 205 69 / 80 means that the second-stage SCI modulation symbols are mapped to the OFDM symbols containing the SL PRS, and the REs for mapping the second-stage SCI modulation symbols are not occupied by the SL PRS.

[00271] The method for mapping the second-stage SCI is different from the method for mapping the second-stage SCI in current standards, where the UE transmitter indicates the method for mapping the second-stage SCI of the receiving UE by setting a penultimate LSB in the reserved bit of the SCI 1-A format to 1.

[00272] In the above method, the modulation mode of the second-stage SCI modulation symbols used to indicate the SL PRS is determined based on a comb size of the SL PRS, so that the second-stage SCI is effectively received in a case where the SL PRS and the second-stage SCI are transmitted in the shared resource grouping, and the effect on the resource selection of the receiving terminal device is reduced.

[00273] The following are embodiments of the apparatus of the present disclosure used to carry out embodiments of the method of the present disclosure. For details not described in the embodiments of the apparatus of the present disclosure, reference may be made to the embodiments of the method of the present disclosure.

[00274] Figure 19 is a block diagram of a resource mapping apparatus according to some embodiments of the present disclosure. The apparatus has the function of performing the resource mapping method. The function is implemented by hardware or by executing the corresponding software through hardware. The apparatus is the terminal device or is disposed of in the terminal device. According to Petition 870250091864, dated 08 / 10 / 2025, pages 176 / 205 70 / 80 illustrated in Figure 19, the 1900 device includes a 1910 processing module.

[00275] The 1910 processing module is configured to map second-stage SCI modulation symbols to a time-frequency feature, where the second-stage SCI indicates at least the transmission of an SL PRS.

[00276] In some embodiments, the second-stage SCI modulation symbols are mapped from a first OFDM symbol that contains a PSSCH DMRS.

[00277] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of at least one virtual resource block allocated from the first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

[00278] In some embodiments, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols that contain a PSCCH.

[00279] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a frequency domain sequence first and then time domain, to REs of at least one virtual resource block allocated from a first OFDM symbol containing the PSCCH according to an ascending order of indices.

[00280] In some embodiments, the terminal device expects a resource grouping to be configured with at least one PSSCH DMRS pattern with a PSSCH DMRS Petition 870250091864, dated 08 / 10 / 2025, pages 177 / 205 71 / 80 present in a first OFDM symbol, and the terminal device selects the PSSCH DMRS pattern with a PSSCH DMRS present in the first OFDM symbol; or

[00281] in the event that a first OFDM symbol does not contain a PSSCH DMRS, the modulation symbols of the second SCI stage are at least mapped to an OFDM symbol that contains a PSSCH DMRS pattern.

[00282] In some embodiments, the second-stage SCI modulation symbols are at least mapped to all OFDM symbols that contain a PSSCH DMRS.

[00283] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

[00284] In some embodiments, in a case where the number of second-stage SCI modulation symbols is greater than the number of REs available for mapping the second-stage SCI to OFDM symbols containing the PSSCH DMRS, the remaining second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of at least one allocated virtual resource block from a first OFDM symbol that does not contain the PSSCH DMRS according to an increasing order of indices.

[00285] In some embodiments, the second-stage SCI modulation symbols are at least mapped Petition 870250091864, dated 08 / 10 / 2025, pages 178 / 205 72 / 80 for all OFDM symbols containing a PSCCH and all OFDM symbols containing a PSSCH DMRS.

[00286] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of OFDM symbols that contain the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol that contains the PSSCH DMRS according to an ascending order of indices, and then are mapped sequentially, in the sequence of first the frequency domain and then the time domain, to REs of at least one virtual resource block allocated from a first OFDM symbol that does not contain the PSSCH DMRS, but contains the PSCCH, according to the ascending order of indices;

[00287] the modulation symbols of the second-stage SCI are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of at least one virtual resource block allocated from a first OFDM symbol that contains the PSCCH according to an increasing order of indices, and then are mapped, in the sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols that contain the DMRS of PSSCH in at least one virtual resource block allocated from a first OFDM symbol that does not contain the PSCCH, but that contains the DMRS of PSSCH according to the increasing order of indices; or

[00288] the modulation symbols of the second-stage SCI are mapped sequentially, in a sequence of first the frequency domain and then the time domain, Petition 870250091864, dated 08 / 10 / 2025, pp. 179 / 205 73 / 80 for REs of OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS and / or the PSCCH according to an ascending order of indices.

[00289] In some embodiments, the second-stage SCI modulation symbols are mapped only to OFDM symbols that contain a PSSCH DMRS.

[00290] In some embodiments, the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to REs of the OFDM symbols containing the PSSCH DMRS in at least one virtual resource block allocated from a first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

[00291] In some embodiments, a modulation mode of the second-stage SCI modulation symbols is determined based on an SL PRS comb size.

[00292] In some embodiments, in a case where the SL PRS comb size is greater than 2, the second-stage SCI modulation symbols are mapped to REs not occupied by the SL PRS in OFDM symbols that contain the SL PRS;

[00293] in a case where the SL PRS comb size is equal to 2, the second-stage SCI modulation symbols are mapped to REs not occupied by the SL PRS and a PSSCH DMRS; or

[00294] In a case where the SL PRS comb size is equal to 1, the second-stage SCI modulation symbols are mapped to OFDM symbols that contain Petition 870250091864, dated 08 / 10 / 2025, pages 180 / 205 74 / 80 a DMRS of PSSCH.

[00295] In some embodiments, the second-stage SCI modulation symbols are mapped to unoccupied REs by at least one of a PSSCH DMRS, an SL PRS, a PSCCH, a PSCCH DMRS, or a PT-RS; or

[00296] the second-stage SCI modulation symbols are mapped to unoccupied REs by a PSSCH DMRS, a PSCCH, a PSCCH DMRS and a PT-RS in OFDM symbols that do not contain the SL PRS.

[00297] In some embodiments, the SL PRS is mapped to unoccupied REs by a PSSCH, a PSCCH DMRS, the second-stage SCI, and a PT-RS in OFDM symbols that do not contain a PSSCH DMRS;

[00298] the SL PRS is mapped to OFDM symbols that do not contain at least one of a PSSCH DMRS, a PSCCH, or a second-stage SCI; or

[00299] The SL PRS is mapped to REs not occupied by at least one of a PSSCH DMRS, a second-stage SCI, a PSCCH, a PSCCH DMRS, or a PT-RS.

[00300] In some embodiments, a second-stage SCI rate matching mechanism ensures that second-stage SCI modulation symbols occupy all available REs for mapping second-stage SCI to a first-ofDM symbol in the first-ofDM mapping symbol.

[00301] In some embodiments, a second-stage SCI rate matching mechanism ensures that second-stage SCI modulation symbols occupy all available REs for mapping second-stage SCI to any OFDM symbol in any OFDM symbol of Petition 870250091864, dated 08 / 10 / 2025, pages 181 / 205 75 / 80 mapping.

[00302] In some embodiments, if the second-stage SCI modulation symbols determined based on a second-stage SCI rate matching mechanism do not completely occupy all available REs for mapping the second-stage SCI onto OFDM symbols that need to be occupied, the second-stage SCI modulation symbols are repeatedly mapped to unoccupied REs available for mapping the second-stage SCI onto the OFDM symbols that must be occupied.

[00303] In some embodiments, in a case where a PSSCH DMRS or a PSCCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device transmits the PSSCH DMRS.

[00304] In some embodiments, the terminal device transmits all PSSCH DMRS in a selected PSSCH DMRS pattern; or

[00305] In a case where a PSSCH DMRS is determined as a reference signal to measure an SL RSRP in a resource cluster in a resource monitoring process, the terminal device transmits part of the PSSCH DMRSs in a selected PSSCH DMRS pattern.

[00306] In the solutions of the technique according to the implementations of the present disclosure, the second-stage SCI used to indicate the transmission of the SL PRS is mapped to the time-frequency resource. In a case where the SL PRS and the second-stage SCI are transmitted in the shared resource cluster, the second-stage SCI is Petition 870250091864, dated 08 / 10 / 2025, pages 182 / 205 76 / 80 effectively received and the effect on the selection of features of the receiving terminal device is reduced.

[00307] It should be noted that, in a case where the device according to the above modalities implements the functions of the same, the division of functional modules is merely illustrative. In practice, the above functions can be assigned and completed by different functional modules according to actual needs, that is, the device can be divided into different functional modules to implement all or part of the above functions.

[00308] With regard to the apparatus in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method and is not described in detail in this document. For details not specified in the apparatus embodiments, reference may be made to the embodiments of the method above.

[00309] With reference to Figure 20, a schematic structural diagram of a terminal device according to some embodiments of the present disclosure is illustrated. The terminal device 2000 includes: a processor 2001, a transceiver 2002 and a memory 2003.

[00310] The 2001 processor includes one or more processing cores, and the 2001 processor executes various functional applications and performs information processing by running programs and software modules.

[00311] The 2002 transceiver includes a receiver and a transmitter, which are implemented, for example, as the same wireless communication assembly that includes a wireless communication chip and a radio frequency antenna.

[00312] Memory 2003 is connected to Petition 870250091864, dated 08 / 10 / 2025, pp. 183 / 205 77 / 80 processor 2001 and transceiver 2002.

[00313] Memory 2003 is configured to store one or more computer programs executed by the processor, and processor 2001 is configured to execute one or more computer programs to perform the processes in the above method modes.

[00314] In some embodiments, the processor is configured to map second-stage SCI modulation symbols to a time-frequency resource, where the second-stage SCI at least indicates the transmission of an SL PRS.

[00315] For details not specified in the modalities, reference is made to the previous modalities, which are not repeated in this document.

[00316] Additionally, memory may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: a magnetic or optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (RAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[00317] The embodiments of the present disclosure further provide a computer-readable storage medium that stores one or more computer programs. The one or more computer programs, when loaded and executed by a processor, cause the processor to perform the resource reselection method described above. In some embodiments, the computer-readable storage medium Petition 870250091864, dated 08 / 10 / 2025, pages 184 / 205 A 78 / 80 computer includes: a ROM, a RAM, a solid-state drive (SSD), an optical disc, and similar components. The RAM includes resistive random-access memory (ReRAM) and dynamic random-access memory (DRAM).

[00318] Some embodiments of the present disclosure additionally provide a chip including a set of programmable logic circuits and / or one or more program instructions. The chip, when running, is configured to perform the resource mapping method in said embodiments above.

[00319] Some embodiments of the present disclosure additionally provide a computer program product. The computer program product includes one or more computer commands stored in a computer-readable storage medium. The instructions from one or more computers, when read from the computer-readable storage medium and executed by a processor, cause the processor to perform the resource mapping method in the versions above.

[00320] It should be understood that the term indication mentioned in the modalities of the present disclosure is a direct indication, an indirect indication, or an indication that an association relationship exists. For example, A indicates B, which may mean that A indicates B directly, for example, B can be acquired by A; or that A indicates B indirectly, for example, A indicates C, by which B can be acquired; or that there is an association relationship between A and B.

[00321] In the description of the modalities of the present disclosure, the term "correspond" indicates a direct or indirect relationship of correspondence between two items, or indicates a relationship of association between the two items; and also indicates Petition 870250091864, dated 08 / 10 / 2025, pages 185 / 205 79 / 80 relationships such as indicating and being indicated, or configuring and being configured.

[00322] In some embodiments of the present disclosure, the term predefined is implemented by pre-storing corresponding codes, tables, or other means that can be defined to indicate related information in devices (including, for example, terminal devices and network devices), and the present disclosure does not limit the specific implementation thereof. For example, predefined refers to defined in a protocol.

[00323] In some embodiments of the present disclosure, the protocol refers to a standard protocol in the field of communication, which includes, for example, the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which is not limited to the present disclosure.

[00324] The term mentioned in this document means two or more. The term and / or describes the association relationship between the associated objects and indicates that three relationships may be present. For example, the sentence A and / or B means (A), (B), or (A and B). The symbol / usually indicates an or relationship between the associated objects.

[00325] References in this document to greater than or equal to may indicate greater than or equal to or simply greater than, and less than or equal to may indicate less than or equal to or simply less than.

[00326] In addition, the serial numbers of the processes described in this document show only one Petition 870250091864, dated 08 / 10 / 2025, pages 186 / 205 80 / 80 is a possible illustrative sequence for executing the processes. In some other embodiments, the processes may also be performed out of numerical sequence, for example, two processes with different serial numbers are performed simultaneously, or two processes with different serial numbers are performed in an order reverse of the illustrated sequence, which is not limited to the present disclosure.

[00327] Those skilled in the art should understand that, in one or more of the above embodiments, the functions described in the embodiments of this disclosure may be implemented in hardware, software, firmware, or any combination thereof. The functions, when implemented in software, may be stored on a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes any means that facilitates the transfer of a computer program from one place to another. The storage medium is any available medium that is accessible by a general-purpose or special-purpose computer.

[00328] The above are merely illustrative examples of the present revelation and are not intended to limit the present revelation. Any modifications, equivalent substitutions, enhancements, and the like, made within the spirit and principles of the present revelation, shall be within the scope of protection of the present revelation. Petition 870250091864, dated 08 / 10 / 2025, pages 187 / 205

Claims

1 / 4 CLAIMS 1. METHOD FOR RESOURCE MAPPING, PERFORMED BY A TERMINAL DEVICE, wherein the method is characterized by comprising: mapping modulation symbols of second-stage side link control information (SCI) to a time-frequency resource, wherein the second-stage SCI indicates at least the transmission of a side link position reference signal (SL).

2. METHOD, according to claim 1, characterized in that the modulation symbols of the second-stage SCI are mapped from a first orthogonal frequency division multiplexing (OFDM) symbol containing a physical side-link shared channel demodulation reference (DMRS) signal (PSSCH).

3. METHOD, according to claim 2, characterized in that the second-stage SCI modulation symbols are mapped sequentially, in a sequence of first the frequency domain and then the time domain, to feature elements (REs) of at least one virtual feature block allocated from the first OFDM symbol containing the PSSCH DMRS according to an increasing order of indices.

4. METHOD, according to any one of claims 1 to 3, characterized in that the second-stage SCI modulation symbols are mapped to resource elements (REs) not occupied by at least one of a physical side-link shared channel demodulation reference signal (PSSCH), the SL PRS, a physical side-link control channel (PSCCH), a PSCCH DMRS, or a phase-band reference signal (PT-RS); or the second-stage SCI modulation symbols are mapped to REs not occupied by a PSSCH DMRS, a PSCCH, a PSCCH DMRS, and a PT-RS in orthogonal frequency-division multiplexing (OFDM) symbols that do not contain the SL PRS.

5. METHOD, according to any one of claims 1 to 4, characterized in that the SL PRS is mapped to feature elements (REs) not occupied by a physical side link shared channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a second-stage SCI, and a phase tracking reference signal (PT-RS) in orthogonal frequency division multiplexing (OFDM) symbols that do not contain a physical side link shared channel (PSSCH) DMRS; the SL PRS is mapped to OFDM symbols that do not contain at least one of a PSSCH DMRS, a PSCCH, or a second-stage SCI; or the SL PRS is mapped to REs not occupied by at least one of a PSSCH DMRS, a second-stage SCI, a PSCCH, a PSCCH DMRS, or a PT-RS.

6. RESOURCE MAPPING APPARATUS characterized by comprising: a processing module, configured to map modulation symbols of second-stage side link control information (SCI) to a time-frequency resource, wherein the second-stage SCI indicates at least the transmission of a side link position reference signal (SL). Petition 870250091864, dated 08 / 10 / 2025, pp. 189 / 205 3 / 4 7. APPARATUS, according to claim 6, characterized in that the SL PRS is mapped to resource elements (REs) not occupied by a physical side link shared channel (PSSCH), a PSCCH demodulation reference signal (DMRS), a second-stage SCI, and a phase tracking reference signal (PT-RS) in orthogonal frequency division multiplexing (OFDM) symbols that do not contain a physical side link shared channel (PSSCH) DMRS; the SL PRS is mapped to OFDM symbols that do not contain at least one of a PSSCH DMRS, a PSCCH, or a second-stage SCI; or the SL PRS is mapped to REs not occupied by at least one of a PSSCH DMRS, a second-stage SCI, a PSCCH, a PSCCH DMRS, or a PT-RS.

8. APPARATUS, according to claim 6 or 7, characterized in that, in a case where a physical side link shared channel (PSSCH) demodulation reference signal (DMRS) or a physical side link control channel (PSCCH) DMRS is determined as the reference signal for measuring a SL reference signal reception power (RSRP) in a resource cluster in a resource monitoring process, a terminal device transmits the PSSCH DMRS.

9. APPARATUS, according to any one of claims 6 to 8, characterized by a terminal device transmitting all physical side link shared channel (PSSCH) demodulation reference signals (DMRSs) in a selected PSSCH DMRS pattern; or Petition 870250091864, dated 10 / 08 / 2025, page 190 / 205 4 / 4 in a case where a PSSCH DMRS is determined as a reference signal for measuring an SL reference signal receive power (RSRP) in a resource cluster in a resource monitoring process, a terminal device transmitting part of the PSSCH DMRSs in a selected PSSCH DMRS pattern.

10. CHIP characterized by comprising: a set of programmable logic circuits and / or program instructions, wherein the chip, when running, is configured to perform the resource mapping method as defined in any one of claims 1 to 5. Petition 870250091864, dated 08 / 10 / 2025, pp. 191 / 205

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