Communication method and apparatus

Abstract

Provided in the embodiments of the present application are a communication method and apparatus, which are used for realizing one-to-one mapping between SL-PRS resources and PSCCHs in a dedicated resource pool. The method may be executed by a first apparatus, and comprises: sending first capability information, wherein the first capability information comprises one or more numbers, the one or more numbers are used for determining a first number, and the first number is the maximum number of PSCCHs that can be received by a first apparatus within one slot in a sidelink positioning dedicated resource pool.

Description

A communication method and apparatus

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410579780.3, filed on May 10, 2024, entitled "A Communication Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0004] In sidelink (SL) scenarios, spectrum resources are granularized into sub-channels, resource pools, and bandwidth parts (BWPs). A network device can configure one BWP for a terminal device. A BWP can be divided into one or more resource pool bandwidths. A resource pool can include multiple sub-channels, and a sub-channel includes multiple resource blocks (RBs).

[0005] In sidelink positioning, the BWP (Browser-Wide Platform) is divided into a dedicated resource pool and a shared resource pool. The dedicated resource pool contains only physical sidelink control channel (PSCCH) and positioning reference signal (PRS) resources. Furthermore, the PSCCH and SL-PRS resources must maintain a one-to-one mapping within a time slot; that is, one PSCCH is associated with one SL-PRS resource. How to achieve this one-to-one mapping between SL-PRS resources and PSCCH in the dedicated resource pool is a problem that urgently needs to be solved. Summary of the Invention

[0006] This application provides a communication method and apparatus for implementing a one-to-one mapping between SL-PRS resources and PSCCH in a dedicated resource pool.

[0007] Firstly, this application provides a communication method, which can be executed by a first device, which may be a terminal device, such as a terminal equipment, or other device including terminal equipment functions, or a chip system (or chip) or other functional module capable of implementing the functions of the terminal equipment, and such chip system or functional module is, for example, disposed in the terminal equipment. The following description assumes that the terminal device is a terminal equipment. The method includes: sending first capability information; wherein the first capability information includes one or more quantities, the one or more quantities being used to determine a first quantity, which is the maximum number of PSCCHs that the first device can receive in a time slot within the sidelink positioning dedicated resource pool.

[0008] In this embodiment, the first device can indicate the number of PSCCHs it can receive within a time slot through first capability information. This allows for the configuration of SL-PRS resources based on the number of PSCCHs, achieving a one-to-one mapping between PSCCHs and SL-PRS resources within a time slot. Furthermore, the first capability information includes one or more quantities, rather than a relationship related to the number of RBs. This helps reduce the probability that the one-to-one mapping between PSCCHs and SL-PRS resources that the first device can receive within a time slot may not be satisfied due to differences in the number of RBs included in the BWP.

[0009] In one optional implementation, the first quantity is included among the one or more quantities. Currently, the capability information transmitted by the terminal device includes a relationship related to the number of RBs. However, in BWP, the number of RBs corresponding to different bandwidths or subcarrier intervals may be different, which may lead to a mismatch between the number of PSCCHs and the number of SL-PRS resources, and the PSCCHs and SL-PRS resources do not satisfy a one-to-one mapping relationship. In this embodiment, carrying the first quantity in the first capability information can reduce the probability that the PSCCHs and SL-PRS resources do not satisfy a one-to-one mapping relationship.

[0010] In one optional implementation, the combination of the one or more quantities includes {4, 8} or {4, 6, 8, 12}. It is understood that this combination of the one or more quantities is merely an example; in other embodiments, the combination of the one or more quantities may be other combinations, such as {6, 12}, etc., and this application does not limit this.

[0011] In one alternative implementation, the number of one or more quantities is related to the comb size. Currently, the number of SL-PRS resources that a UE can transmit in a time slot is related to the comb size. Therefore, determining the number of PSCCHs that a UE can receive in a time slot based on the comb size is the same as determining the number of SL-PRS resources that a UE can transmit in a time slot, thereby achieving a one-to-one mapping between PSCCHs and SL-PRS resources.

[0012] In one optional implementation, the one or more quantities include a second quantity, which is the maximum number of active side-link positioning reference signal resources corresponding to the processing capacity of all configured resource pools of the first device within a time slot. The second quantity is used to determine the first quantity. Multiplexing the number of side-link positioning reference signal resources that the first device can process within a time slot to determine the number of PSCCHs that the first device can receive within a time slot can save signaling overhead.

[0013] In one alternative implementation, the number of one or more is independent of the number of RBs. This independence reduces the probability that the PSCCH and SL-PRS resources that the first device can receive within a time slot do not satisfy a one-to-one mapping due to differences in bandwidth and subcarrier spacing.

[0014] In one optional implementation, the first capability information is carried in a first signaling and / or a second signaling; wherein the first signaling indicates that the first device is capable of receiving a sidelink positioning reference signal in the sidelink positioning dedicated resource pool; and the second signaling indicates that the first device is capable of transmitting the sidelink positioning reference signal in a full-monitor manner in the sidelink positioning dedicated resource pool. Currently, the second signaling does not carry the first capability information. Adding the first capability information to the second signaling can achieve a one-to-one mapping between PSCCH and SL-PRS resources when the first device transmits SL-PRS in sidelink Mode 2 (i.e., sensing mode).

[0015] In one optional implementation, the first capability information is carried in a radio resource control (RRC) message and / or a sidelink positioning protocol. The first device can interact with network devices or with terminal devices to exchange the first capability information, allowing the first capability information of the first device to be reported to network devices via other terminal devices.

[0016] Secondly, a communication method is provided, which can be executed by a first device, which may be a terminal device, such as a terminal equipment, or other device including terminal equipment functions, or a chip system (or chip) or other functional module capable of implementing the functions of the terminal equipment, and the chip system or functional module is, for example, disposed in the terminal equipment. The following description assumes that the terminal device is a terminal equipment. The method includes: sending first capability information; wherein the first capability information includes a first relationship, the first relationship being the relationship between a first quantity and the number of symbols and / or comb size of the sidelink positioning reference signal, the first quantity being the maximum number of PSCCHs that the first device can receive in one time slot in the sidelink positioning dedicated resource pool.

[0017] In this embodiment, the first relationship is the relationship between the first quantity and the number of symbols and / or comb size of the sidelink positioning reference signal. Currently, the number of SL-PRS resources that a UE can transmit in a time slot is determined by the number of symbols and comb size of the sidelink positioning reference signal. Therefore, the probability of matching the first quantity determined according to the first relationship with the number of SL-PRS resources that a UE can transmit in a time slot is relatively high, which helps to improve the probability of one-to-one mapping between PSCCH and SL-PRS resources.

[0018] In one optional implementation, the first relationship is the relationship between a first quantity and comb size, and the first relationship includes:

[0019] N PSCCH ={floor(K / (N))*N}

[0020] or,

[0021] N PSCCH ={floor(K / (N+1))*N}

[0022] Where, N PSCCH Let N be the first quantity, N be the comb size, and K be a constant. K can take any integer value from 9 to 14.

[0023] In one alternative implementation, the first relationship includes:

[0024] N PSCCH ={floor(10 / (N))*N}

[0025] or,

[0026] N PSCCH ={floor(10 / (N+1))*N}

[0027] Where, N PSCCH Where N is the first quantity, and N is the comb size.

[0028] In one optional implementation, the first relationship is the relationship between a first quantity and the number of symbols and comb size of the side-link positioning reference signal, and the first relationship includes:

[0029] N PSCCH ={floor(K / (M+1))*N}

[0030] Where, N PSCCH Where M is the first quantity, N is the number of symbols in the side-link positioning reference signal, K is the comb size, and K is a constant. K takes any integer value from 9 to 14.

[0031] In one alternative implementation, the first relationship includes:

[0032] N PSCCH ={floor(10 / (M+1))*N}

[0033] Where, N PSCCH M is the first quantity, M is the number of symbols in the side link positioning reference signal, and N is the comb size.

[0034] In one optional implementation, the first relationship is the relationship between a first quantity and the number of symbols in the side-link positioning reference signal, and the first relationship includes:

[0035] N PSCCH ={floor(K / (M))*M}

[0036] or,

[0037] N PSCCH ={floor(K / (M+1))*M}

[0038] Where, N PSCCH Where M is the first quantity, M is the number of symbols in the side-link positioning reference signal, and K is a constant. In the above formula, the value of K can be any integer value from 9 to 14.

[0039] In one alternative implementation, the first relationship includes:

[0040] N PSCCH ={floor(10 / (M))*M}

[0041] or,

[0042] N PSCCH={floor(10 / (M+1))*M}

[0043] Where, N PSCCH M is the first quantity, and M is the number of symbols in the side-link positioning reference signal.

[0044] It is understood that the above-mentioned first relationship is only an example. In other embodiments, the first relationship may be other relationships, and the embodiments of this application do not limit this.

[0045] In one alternative implementation, the number of one or more is independent of the number of RBs. This independence reduces the probability that the PSCCH and SL-PRS resources that the first device can receive within a time slot do not satisfy a one-to-one mapping due to differences in bandwidth and subcarrier spacing.

[0046] In one optional implementation, the first capability information is carried in a first signaling and / or a second signaling; wherein the first signaling indicates that the first device is capable of receiving a sidelink positioning reference signal in the sidelink positioning dedicated resource pool; and the second signaling indicates that the first device is capable of transmitting the sidelink positioning reference signal in a full-detection manner in the sidelink positioning dedicated resource pool. Currently, the second signaling does not carry the first capability information. Adding the first capability information to the second signaling can achieve a one-to-one mapping between PSCCH and SL-PRS resources when the first device transmits SL-PRS through sidelink Mode 2.

[0047] In one optional implementation, the first capability information is carried in an RRC message and / or a sidelink positioning protocol. The first device can interact with network devices or with terminal devices to exchange the first capability information, allowing the first capability information of the first device to be reported to network devices via other terminal devices.

[0048] Thirdly, a communication method is provided, which can be executed by a first device, which may be a terminal device, such as a terminal equipment, or other device including terminal equipment functions, or a chip system (or chip) or other functional module capable of implementing the functions of the terminal equipment, and the chip system or functional module is, for example, disposed in the terminal equipment. The following description assumes that the terminal device is a terminal equipment. The method includes: sending first capability information; wherein the first capability information includes a second relationship, the second relationship being the relationship between a first quantity and a resource block quantity, the first quantity being the maximum number of PSCCHs that the first device can receive in a time slot in the sidelink positioning dedicated resource pool, and the resource block quantity being the total number of resource blocks included in the portion of bandwidth corresponding to the sidelink positioning dedicated resource pool; the first capability information is carried on second signaling, the second signaling being used to indicate that in the sidelink positioning dedicated resource pool, the first device can transmit sidelink positioning reference signals in a full-detection manner.

[0049] In this embodiment of the application, adding first capability information to the second signaling can realize a one-to-one mapping between PSCCH and SL-PRS resources when the first device transmits SL-PRS in sidelink Mode 2.

[0050] In one optional implementation, the first capability information is carried in an RRC message and / or a sidelink positioning protocol. The first device can interact with network devices or with terminal devices to exchange the first capability information, allowing the first capability information of the first device to be reported to network devices via other terminal devices.

[0051] Fourthly, a communication device is provided. The communication device may be the first device described in any one of the first to third aspects above. The communication device possesses the functions of the first device described above. The communication device may be, for example, a terminal device, or other device including terminal device functions, or a chip system (or chip) or other functional module capable of implementing the functions of a terminal device, and the chip system or functional module may be disposed, for example, in a terminal device. In one optional implementation, the communication device includes a baseband device and a radio frequency device. In another optional implementation, the communication device includes a processing unit (sometimes also called a processing module) and a transceiver unit (sometimes also called a transceiver module). The transceiver unit is capable of transmitting and receiving functions. When the transceiver unit performs the transmitting function, it may be called a transmitting unit (sometimes also called a transmitting module), and when the transceiver unit performs the receiving function, it may be called a receiving unit (sometimes also called a receiving module). The transmitting unit and the receiving unit may be the same functional module, which is called the transceiver unit and can perform both transmitting and receiving functions; or, the transmitting unit and the receiving unit may be different functional modules, and the transceiver unit is a collective term for these functional modules.

[0052] In one optional implementation, the transceiver unit (or the sending unit) is configured to send first capability information; wherein the first capability information includes one or more quantities, the one or more quantities being used to determine a first quantity, the first quantity being the maximum number of PSCCHs that the first device can receive in one time slot in the sidelink positioning dedicated resource pool.

[0053] In one optional implementation, the transceiver unit (or the transmitting unit) is configured to transmit first capability information; wherein the first capability information includes a first relationship, the first relationship being the relationship between a first quantity and the number of symbols and / or comb size of the sidelink positioning reference signal, and the first quantity being the maximum number of PSCCHs that the first device can receive in one time slot in the sidelink positioning dedicated resource pool.

[0054] In one optional implementation, the transceiver unit (or the sending unit) is configured to send first capability information; wherein the first capability information includes a second relationship, the second relationship being the relationship between a first quantity and a resource block quantity, the first quantity being the maximum number of PSCCHs that the first device can receive in a time slot within the sidelink positioning dedicated resource pool, and the resource block quantity being the total number of resource blocks included in the partial bandwidth corresponding to the sidelink positioning dedicated resource pool; the first capability information is carried on second signaling, the second signaling being used to indicate that in the sidelink positioning dedicated resource pool, the first device can transmit sidelink positioning reference signals in a full-detection manner.

[0055] In one optional implementation, the processing unit is configured to control the transceiver unit to send first capability information.

[0056] In an alternative embodiment, the communication device further includes a storage unit (sometimes also called a storage module), and the processing unit is configured to couple with the storage unit and execute programs or instructions in the storage unit to enable the communication device to perform the functions of the first device described in the first or second aspect above.

[0057] Fifthly, a communication device is provided, which can be the first device described in any one of the first to third aspects above. The communication device possesses the functions of the first device. The communication device is, for example, a terminal device, or other device including terminal device functions, or a system-on-a-chip (or chip) or other functional module capable of implementing the functions of a terminal device, and the chip system or functional module is, for example, disposed in a terminal device. The communication device includes a processor for executing the functions of the first device described in any one of the first to third aspects above. Optionally, the communication device further includes a memory. The memory stores a computer program, and the processor is coupled to the memory. When the processor reads the computer program or instructions, it causes the communication device to execute the methods performed by the first device in the above aspects.

[0058] In a sixth aspect, a computer-readable storage medium is provided for storing a computer program or instructions that, when executed, cause the method performed by the first apparatus in the above aspects to be implemented.

[0059] In a seventh aspect, a computer program product containing instructions is provided, which, when the computer program or instructions are run on a computer, causes the methods described in the above aspects to be implemented.

[0060] Eighthly, a chip system is provided, including a processor and an interface, the processor being configured to call and execute instructions from the interface to enable the chip system to implement the methods of the above aspects.

[0061] The beneficial effects of aspects four through eight mentioned above can be referenced from the beneficial effects of any one of aspects one through three, and will not be repeated here. Attached Figure Description

[0062] Figure 1 is a schematic diagram of the positioning architecture of the 5G core network of NG-RAN;

[0063] Figure 2 shows a sidelink resource configuration diagram;

[0064] Figure 3 shows the time-frequency resources corresponding to different combinations of symbol number and comb size in SL-PRS.

[0065] Figure 4 is a schematic diagram of the system architecture under several possible side-link positioning scenarios applicable to the embodiments of this application;

[0066] Figures 5, 6, and 7 are schematic flowcharts of several communication methods provided in the embodiments of this application;

[0067] Figure 8 is a flowchart illustrating several other communication methods provided in the embodiments of this application;

[0068] Figure 9 is a schematic diagram of a device provided in an embodiment of this application;

[0069] Figure 10 is a schematic diagram of another device provided in an embodiment of this application. Detailed Implementation

[0070] Figure 1 illustrates the positioning architecture of the 5G core network in a next-generation radio access network (NG-RAN). In the NG-RAN positioning network architecture, the access and mobility function (AMF) entity receives positioning service requests for a specific terminal device from other network elements. The AMF entity forwards the received positioning service request to the location management function (LMF) entity, which processes the received request and initiates the relevant positioning process. The NG-RAN access network includes 4G sites (ng-eNB) and 5G sites (gNB) connected to the 5G core network. NG-RAN is responsible for sending and receiving positioning reference signals and acquiring relevant measurement information.

[0071] An ng-eNB is a device or apparatus deployed in a radio access network that meets 4G standards and provides wireless communication capabilities to terminal devices. An ng-eNB can include various forms of base stations, access points, etc. An ng-eNB can also be a transmission and reception point (TRP) for transmitting and receiving reference signals.

[0072] A gNB is a device or apparatus deployed in a radio access network that meets 5G standards and provides wireless communication capabilities to terminal devices. A gNB can include various forms of base stations, access points, etc. A gNB can also be a Transmit and Receive Reference Point (TRP) or a Transmission Measurement Function (TMF) entity.

[0073] The architecture described above may also include an enhanced serving mobile location center (E-SMLC). An E-SMLC is a network element, module, or component in a 4G core network that provides positioning functionality.

[0074] The architecture described above may also include a Service Location Protocol (SLP) entity. An SLP is a network element, module, or component in a 4G core network that handles user plane security location protocols.

[0075] In this application embodiment, the number of nouns, unless otherwise specified, refers to "singular nouns or plural nouns," that is, "one or more." "At least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0076] The ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. Furthermore, the numbering of steps in the various embodiments described in this application is only to distinguish different steps and is not used to limit the order in which the steps are performed.

[0077] The embodiments of this application are described below with reference to the accompanying drawings.

[0078] In sidelink communication, the number of PSCCHs (e.g., X) that a UE can receive within a time slot is related to the number of RBs included in the BWP. For example, X = {floor(N RB / 10)}, or, X=2*{floor(N RB / 10)}。 Where, N RB This represents the total number of RBs included in the BWP.

[0079] In sidelink positioning, the BWP is divided into a dedicated resource pool and a shared resource pool. The dedicated resource pool contains only PSCCH and SL-PRS resources. A PSCCH can occupy two or three orthogonal frequency division multiplexing (OFDM) symbols within a time slot. The PSCCH and SL-PRS resources are time-division related within a time slot, and there is a one-to-one mapping between them; that is, one PSCCH is associated with one SL-PRS resource. In sidelink positioning, the reference signal used for positioning can be a PRS, an SL-PRS, or other reference signals. This application does not limit this; the following embodiments use SL-PRS as an example. In this application, OFDM symbols and symbols can be used interchangeably.

[0080] Please refer to Figure 2, which shows a sidelink resource configuration diagram. Figure 2 includes four SL-PRS resources, each corresponding to a PSCCH on a subchannel. For example, SL-PRS resource 0 corresponds to PSCCH 0 on subchannel 0, SL-PRS resource 1 corresponds to PSCCH 1 on subchannel 1, SL-PRS resource 2 corresponds to PSCCH 2 on subchannel 2, and SL-PRS resource 3 corresponds to PSCCH 3 on subchannel 3. The UE can obtain the SL-PRS resource information by demodulating the sidelink control information (SCI) on the PSCCH. Furthermore, in the sidelink resource configuration diagram shown in Figure 2, the first symbol is the Automatic Gain Control (AGC) symbol, and the last symbol can be the GAP symbol. The AGC symbol is used by the receiver to adjust the operating point, causing the amplifier circuit gain to automatically adjust according to the signal strength. The AGC symbol can transmit data or not transmit data. The GAP symbol is a time interval, which can be used to perform transmit / receive switching.

[0081] In the dedicated resource pool, the number of PSCCHs a UE can receive within a time slot is currently configured in the sidelink communication multiplexing, meaning the number of PSCCHs a UE can receive within a time slot is related to the number of RBs in the BWP, i.e., X = {floor(N RB / 10)}, or, X=2*{floor(N RB / 10)}, where NRB is the total number of RBs included in the BWP. Thus, for different bandwidths or different sub-carrier spaces (SCS), the number of RBs included in the BWP may differ, and correspondingly, the number of PSCCHs that the UE can receive within a time slot may also differ. For example, please refer to Table 1, which shows the relationship between the number of PSCCHs that the UE can receive within a time slot and bandwidth and SCS. In Table 1, X = {floor(N RB For example, / 10)}.

[0082] Table 1

[0083] In Table 1, when bandwidth = 20MHz and SCS = 15kHz, N RB =106, X=10; when bandwidth=20MHz, SCS=30KHz, N RB=51, X=5, ..., when bandwidth=100MHz, SCS=60KHz, N RB =135, X=13.

[0084] The number of SL-PRS resources that a UE can transmit within a time slot can currently be determined by the number of SL-PRS symbols (M) and comb size (N) supported by the dedicated resource pool (hereinafter referred to as the dedicated resource pool) located on the side-link. The combination of the number of SL-PRS symbols and comb size (i.e., M and N) supported by the dedicated resource pool can be: (M, N) = (1, 2), (2, 2), (2, 4), (4, 4), (6, 6). Please refer to Figures 3(a) to (e), which are schematic diagrams of the time-frequency resources corresponding to the above combinations of M and N. For example, the diagonally filled squares in Figure 3 can represent the RB occupied by SL-PRS resource 0.

[0085] A time slot contains 14 symbols, including the AGC symbol preceding the symbol occupied by the PSCCH, the last GAP symbol, and the 2 or 3 symbols occupied by the PSCCH within a time slot. Therefore, SL-PRS resources can occupy a maximum of 10 symbols. Taking 10 symbols of SL-PRS resources as an example, the number of SL-PRS resources that a UE can transmit within a time slot satisfies the following relationship:

[0086] Y={floor(10 / (M+1))*N} (Formula 1)

[0087] Where Y represents the number of SL-PRS resources that a UE can transmit within a time slot. Therefore, for (M, N) = (1, 2), Y = 10 is calculated according to Formula 1 above; for (M, N) = (2, 2), Y = 6 is calculated according to Formula 1 above; for (M, N) = (2, 4), Y = 12 is calculated according to the above relationship; for (M, N) = (4, 4), Y = 8 is calculated according to Formula 1 above; and for (M, N) = (6, 6), Y = 6 is calculated according to Formula 1 above. That is, the number of SL-PRS resources that a UE can transmit within a time slot is 6, 8, 10, or 12. This may not match the number of PSCCHs that a UE can receive within a time slot, thus failing to satisfy the one-to-one mapping relationship between SL-PRS resources and PSCCHs.

[0088] In view of this, embodiments of this application provide a communication method in which the capability information reported by the terminal device can indicate a set of quantities and / or a functional relationship related to the aforementioned M and N. Thus, the number of PSCCHs that the terminal device can receive in a time slot can be determined based on the set of quantities or the functional relationship. Based on the number, SL-PRS resources can be configured to realize a one-to-one mapping relationship between PSCCHs and SL-PRS resources in a time slot.

[0089] The technical solutions provided in this application are primarily applicable to wireless communication systems. These systems can comply with the wireless communication standards of the Third Generation Partnership Project (3GPP). For example, the solutions provided in this application can be applied to fourth-generation (4G) mobile communication systems, such as Long Term Evolution (LTE) systems, as well as 5G communication systems, such as 5G New Radio (NR) systems, or various future communication systems, such as sixth-generation (6G) systems. The technical solutions provided in this application can also comply with other wireless communication standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802 series (e.g., 802.11, 802.15, or 802.20) wireless communication standards.

[0090] The method provided in this application embodiment can also be applied to Bluetooth systems, Wi-Fi systems, LoRa systems, or vehicle-to-everything (V2X) systems. The method provided in this application embodiment can also be applied to satellite communication systems, wherein the satellite communication system can be integrated with the aforementioned communication systems.

[0091] Figure 4 illustrates a schematic diagram of the system architecture for several possible side-link positioning scenarios applicable to the embodiments of this application.

[0092] Figure 4(a) illustrates an out-of-coverage architecture where terminal 10 and terminal 20 establish a direct communication connection, but neither terminal 10 nor terminal 20 establishes a connection with the network device. Terminal 10 and terminal 20 can achieve mutual positioning by sending side-link positioning reference signals for ranging or angle measurement. Figure 4(a) illustrates this using two terminals as an example; this system architecture can also include many other terminals.

[0093] Figure 4(b) illustrates how terminal 30 achieves positioning by receiving sidelink positioning reference signals from multiple roadside units (RSUs) (such as RSU 1, RSU 2, and RSU 3 shown in the figure). An RSU is a roadside unit deployed along the roadside that meets sidelink communication / positioning protocols and provides wireless communication functionality to the terminal. RSUs can be various forms of roadside sites, access points, sidelink devices, etc. Figure 4(b) illustrates a single terminal and three RSUs; however, this system architecture can also include many other terminals and RSUs.

[0094] Figure 4(c) illustrates how terminals 40 and 50, within network coverage, achieve mutual ranging or angle measurement under the control of base station 60 by sending sidelink positioning reference signals. The measurement results are then transmitted via base station 60 to the LMF 70 in the core network for positioning. Figure 4(c) uses two terminals and one network device as an example; however, this system architecture can also include a greater number of other terminals and network devices.

[0095] The terminal devices in this application embodiment (such as the terminals in the various scenarios in Figure 4, and the first terminal device, second terminal device, etc. involved later) may include devices that provide voice and / or data connectivity to users. For example, they may include handheld devices with wireless connectivity or processing devices connected to a wireless modem. The terminal can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN. The terminal may include user equipment (UE), wireless terminal, mobile terminal, device-to-device (D2D) communication terminal, vehicle-to-everything (V2X) communication terminal, machine-to-machine / machine-type communications (M2M / MTC) communication terminal, Internet of Things (IoT) terminal, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user device, etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminals, portable, pocket-sized, handheld, or computer-embedded mobile devices, etc. Examples include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). Terminals can also be tablets or computers with wireless transceiver capabilities. Furthermore, terminals can be virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in autonomous driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in smart cities, and wireless terminals in smart homes.This also includes limited devices, such as those with low power consumption, limited storage capacity, or limited computing power. Examples include information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), and laser scanners.

[0096] The terminal equipment may sometimes be referred to as UE, terminal, access station, UE station, remote station, wireless communication equipment, or user equipment, etc.

[0097] In this application embodiment, the communication device used to implement the terminal device function can be the terminal device itself, or it can be a device capable of supporting the terminal device in implementing the function, such as a chip system. This device can be installed in the terminal device. In the technical solutions provided in this application embodiment, the terminal device is used as an example to describe the technical solutions provided in this application embodiment. Furthermore, for ease of description, the terminal device in this application embodiment is described using a UE as an example.

[0098] The network devices in this application embodiment include, for example, access network devices and / or core network devices. The access network devices are devices with wireless transceiver capabilities, used to communicate with the terminal devices. The access network devices include, but are not limited to, base stations (base transceiver stations, BTS, Node B, evolved Node B (eNodeB) / eNB, or the next generation Node B (gNodeB) / gNB), transmission reception points (TRPs), base stations evolved from the 3rd generation partnership project (3GPP), access nodes in wireless fidelity (Wi-Fi) systems, wireless relay nodes, wireless backhaul nodes, etc. The base stations can be: macro base stations, micro base stations, pico base stations, small cells, relay stations, satellite-based base stations, satellite ground stations, etc. Multiple base stations can support networks using the same access technology or networks using different access technologies. A base station can contain one or more co-located or non-co-located transmission and reception points. The access network equipment can also be a radio controller, centralized unit (CU), and / or distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network equipment can also be a server, etc. For example, the network equipment in V2X technology can be a RSU. The following description uses a base station as an example to illustrate the access network equipment. A base station can communicate with a terminal device, or it can communicate with a terminal device through a relay station. A terminal device can communicate with multiple base stations in different access technologies. The core network equipment is used to implement functions such as mobility management, data processing, session management, policy and charging. The names of the equipment implementing core network functions may differ in systems using different access technologies; this application does not limit this. Taking the 5th generation (5G) mobile communication technology system as an example, the core network equipment includes, for example, an AMF (Active Mobile Function), a session management function (SMF), a policy control function (PCF), or a user plane function (UPF), etc.

[0099] In the CU-DU architecture, access network equipment can include one or more logical network elements such as CU, DU, CU-control plane (CP), CU-user plane (UP), or radio unit (RU). CU and DU can be separate entities or included in the same network element, such as a baseband unit (BBU). RU can be included in radio equipment or radio units, such as remote radio units (RRU), active antenna units (AAU), or remote radio heads (RRH).

[0100] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open RAN (ORAN) system, CU can also be called open CU (open CU, O-CU), DU can also be called open DU (open DU, O-DU), CU-CP can also be called open CU-CP (open CU-CP, O-CU-CP), CU-UP can also be called open CU-UP (open CU-CP, O-CU-UP), and RU can also be called open RU (open RU, O-RU). For ease of description, the embodiments of this application use CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in the embodiments of this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0101] Optionally, in various embodiments of this application, if the network device is a distributed architecture, such as the network device including CU and DU, or including CU-CP, CU-UP and DU, then the network device sends information to the UE, specifically the DU included in the network device sends information to the UE; the network device receives information from the UE, specifically the DU included in the network device receives information from the UE.

[0102] In this application embodiment, the communication device used to implement the network device function can be a network device or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of this application, the technical solutions provided in the embodiments of this application are described with the example of a network device being used to implement the function of a network device (for example, an access network device being used to implement the function of an access network device, or a core network device being used to implement the function of a core network device).

[0103] The methods provided in the embodiments of this application are described below with reference to the accompanying drawings. The various embodiments herein can be applied to the network architectures shown in Figure 1 or Figure 4. In the accompanying drawings corresponding to the various embodiments of this application, steps indicated by dashed lines are optional.

[0104] This application provides a first communication method, please refer to Figure 5, which is a flowchart of the method.

[0105] S501: The first device sends first capability information to the second device, the first capability information including one or more quantities. Accordingly, the second device receives the first capability information.

[0106] The first device is a terminal device. For example, the first device can be the UE shown in Figure 1, or it can be the terminal 10, terminal 20, terminal 30, terminal 40 or terminal 50 shown in Figure 4.

[0107] The second device can be a network device, such as one or more of RSU 1, RSU 2, or RSU 3 shown in Figure 4, or the second device can be base station 60 or LMF 70 shown in Figure 4. Alternatively, the second device can be a terminal device, such as terminal 10, terminal 20, terminal 40, or terminal 50 shown in Figure 4. Or, the second device can also include both network device and terminal device; for example, the second device can include base station 60 and terminal 40 shown in Figure 4.

[0108] Wherein, if the second device includes a terminal device, the terminal device included in the second device is a different terminal from that of the first device. For example, the first device is terminal 10 shown in Figure 4(a), and the terminal device included in the second device can be terminal 20 shown in Figure 4(a); or, for another example, the first device is terminal 50 shown in Figure 4(c), and the terminal device included in the second device can be terminal 40 shown in Figure 4(c).

[0109] The one or more quantities are used to determine the first quantity. The first quantity is the maximum number of PSCCHs that the first device can receive within a time slot in the dedicated resource pool. This first quantity may include the number of PSCCHs received by the first device via sidelink Mode 1 (i.e., on the SL-PRS resource), and / or the number of PSCCHs received by the first device via sidelink Mode 2.

[0110] Optionally, the first quantity is included in the one or more quantities. The combinations corresponding to the first or more quantities include {4, 8} or {4, 6, 8, 12}.

[0111] Alternatively, the combination corresponding to the one or more quantities can also be one or more selected from the set {2, 4, 6, 8, 12}. It is understood that the values ​​included in this set are merely examples, and in other embodiments, the set of quantities may also include other values, which are not limited in this application.

[0112] The combination corresponding to the one or more quantities is selected from the set {2, 4, 6, 8, 12}, and the combination corresponding to the one or more quantities can be divided into the following cases:

[0113] Case 1: The combination corresponding to the one or more quantities includes one quantity. The combination corresponding to the one or more quantities can be any one of: {2}, {4}, {6}, {8}, or {12}.

[0114] Case 2: The combination corresponding to the one or more quantities includes two quantities. The combination corresponding to the one or more quantities can be any one of: {2, 4}, {2, 6}, {2, 8}, {2, 12}, {4, 6}, {4, 8}, {4, 12}, {6, 8}, {6, 12}, or {8, 12}.

[0115] Case 3: The combination corresponding to the one or more quantities includes 3 quantities. The combination corresponding to the one or more quantities can be any one of the following: {2, 4, 6}, {2, 4, 8}, {2, 4, 12}, {2, 6, 8}, {2, 6, 12}, {2, 8, 12}, {4, 6, 8}, {4, 6, 12}, {4, 8, 12}, or {6, 8, 12}.

[0116] Case 4: The combination corresponding to the one or more quantities includes 4 quantities. The combination corresponding to the one or more quantities can be any one of: {2, 4, 6, 8}, {2, 4, 6, 12}, {2, 4, 8, 12}, {2, 6, 8, 12}, or {4, 6, 8, 12}.

[0117] Case 5: The combination of one or more quantities includes 5 quantities. The combination of one or more quantities can be: {2, 4, 6, 8, 12}.

[0118] The second device can select one quantity from the combinations corresponding to the one or more quantities as the first quantity. For example, if the combination of the one or more quantities includes one quantity, such as in case 1 above, the second device can select that quantity as the first quantity; or if the combination of the one or more quantities includes more than one quantity, the second device can select one quantity from multiple quantities as the first quantity. Optionally, the second device can select the quantity with the largest value among the multiple quantities as the first quantity.

[0119] Optionally, the one or more quantities can also be related to the comb size. For example, as shown in Figure 3, the comb size supported by the dedicated resource pool can be 2, 4, or 6, meaning that the combination corresponding to the one or more quantities can also be one or more of {2, 4, 6}. Optionally, if the one or more quantities are related to the comb size, the first capability information can also include indication information to indicate that the one or more quantities are related to the comb size.

[0120] The second device can determine the first quantity based on the comb size supported by the dedicated resource pool. As mentioned above, the number of SL-PRS resources that the UE can transmit in one time slot can be determined by the number of SL-PRS symbols supported by the dedicated resource pool and the comb size; that is, the number of SL-PRS resources that the UE can transmit in one time slot is related to the comb size. Therefore, optionally, when one or more quantities included in the first capability information are related to the comb size, the second device can determine the first quantity based on the number of SL-PRS resources that the first device can transmit in one time slot corresponding to that comb size.

[0121] Taking the aforementioned description of determining Y according to Formula 1 as an example, for a comb size of 2, the first device can transmit 6 or 10 SL-PRS resources in one time slot, and the second device can determine the first quantity as 6 or 10; for a comb size of 4, the first device can transmit 8 or 12 SL-PRS resources in one time slot, and the second device can determine the first quantity as 8 or 12; for a comb size of 6, the first device can transmit 6 SL-PRS resources in one time slot, and the second device can determine the first quantity as 6. Wherein, for a comb size of 2 or a comb size of 4, the determined number of SL-PRS resources that the first device can transmit in one time slot can have multiple values, and the second device can determine the largest value among these multiple values ​​as the first quantity. In this embodiment, the correspondence between comb size and the first quantity is only an example; other relationships may exist between comb size and the first quantity, and this embodiment does not limit this.

[0122] Optionally, the one or more quantities may further include a second quantity, which is the maximum number of activated SL-PRS resources corresponding to the processing capacity of all configured resource pools of the first device within a time slot, assuming that the first device supports and reports the maximum SL PRS bandwidth (MHz). The maximum number of activated SL-PRS resources corresponding to the processing capacity of all configured resource pools of the first device within a time slot can also be understood as the maximum number of activated SL-PRS resources that the first device can receive and / or transmit on all configured resource pools within a time slot.

[0123] The second device can determine the first quantity based on the second quantity. For example, the second device can use the maximum number of activated SL-PRS resources corresponding to the processing capacity of all configured resource pools of the first device within a time slot as the first quantity.

[0124] Optionally, the first capability information may be carried in a first signaling and / or a second signaling. It is understood that the first capability information may also be carried in other signaling, and this embodiment does not limit the signaling carried by the first capability information. Optionally, when the first capability information is carried in other signaling, the first signaling and / or the second signaling may carry information indicating that other signaling, as described in Table 4.

[0125] The first signaling is used to indicate that the first device can receive SL-PRS in the dedicated resource pool. For example, the first signaling is the 41-1-3 signaling in UE feature. Please refer to Tables 2 to 4 for the corresponding UE feature 41-1-3.

[0126] Table 2

[0127] In Table 2, X is the first quantity, which can be selected from the quantity set {4, 6, 8, 12}.

[0128] Table 3

[0129] In Table 3, X is the first quantity, which can be determined based on the quantity set {2, 4, 6}, which is related to the comb size.

[0130] Table 4

[0131] In Table 4, X represents the first quantity. X can be determined based on the second quantity included in the capability information reported by the 41-1-1 signaling in the UE feature. That is, in the embodiment shown in Table 4, the first capability information is carried in the 41-1-1 signaling in the UE feature, and the 41-1-3 signaling in the UE feature includes the indication information of the 41-1-1 signaling. For the syntax of UE feature 41-1-1, please refer to Table 5.

[0132] Table 5

[0133] The second signaling is used to indicate that the first device can transmit SL-PRS through full detection in the dedicated resource pool. For example, the second signaling is signaling 41-1-10 in UE feature 41-1-3. Please refer to Tables 6 to 8 for the corresponding UE feature 41-1-3. Currently, the second signaling does not carry the first capability information. In this embodiment, the reporting of the first capability information is added to the second signaling.

[0134] Table 6

[0135] In Table 6, X is the first quantity, which can be selected from the quantity set {4, 6, 8, 12}.

[0136] Table 7

[0137] In Table 7, X is the first quantity, which can be determined based on the quantity set {2, 4, 6}, which is related to the comb size.

[0138] Table 8

[0139] In Table 8, X represents the first quantity. X can be determined based on the second quantity included in the capability information reported by the 41-1-1 signaling in the UE feature. That is, in the embodiment shown in Table 8, the first capability information is carried in the 41-1-1 signaling in the UE feature, and the 41-1-10 signaling in the UE feature includes the indication information of the 41-1-1 signaling. The notation of UE feature 41-1-1 can be found in Table 5.

[0140] Optionally, the first capability information can be carried in an RRC message and / or a sidelink positioning protocol (SLPP). For example, if the second device is a network device, the first device can carry the first capability information in an RRC message and send it to the second device, such as in the terminal device capability information UECapabilityInformation carried in the RRC message, or the first device can also carry the first capability information in UECapabilityInformationSidelink and send it to the second device. If the second device is a terminal device, the first device can carry the first capability information in SLPP and send it to the second device.

[0141] Optionally, the first device may send the first capability information to the second device after receiving a request information from the second device. Therefore, before executing S501, S502 may also be executed: the second device sends capability request information to the first device. Correspondingly, the first device receives the capability request information. Wherein, if the second device is a network device, the capability request information sent by the second device to the first device may be, for example, a terminal device capability query UECapabilityEnquiry, or it may be an acquisition of system information block (SIB) 12 (type 12), i.e., SIB12 acquisition; if the second device is a terminal device, the capability request information sent by the second device to the first device may be, for example, a capability request RequestCapabilities.

[0142] Optionally, the second device is a network device. When the first device sends the first capability information to the network device, it can also determine whether to carry the first capability information in UECapabilityInformation or UECapabilityInformation based on the capability request information from the second device. For example, if the capability request information from the second device is UECapabilityEnquiry, the first device can carry the first capability information in UECapabilityInformation and send it to the second device; if the capability request information from the second device is SIB12 acquisition, the first device can carry the first capability information in UECapabilityInformationSidelink and send it to the second device.

[0143] In the above technical solution, the first capability information sent by the first device includes one or more quantities, rather than a relationship related to the number of RBs. This helps to reduce the probability that the PSCCH and SL-PRS resources that the first device can receive in a time slot do not satisfy a one-to-one mapping relationship due to the different number of RBs corresponding to different bandwidths or subcarrier intervals in the BWP.

[0144] This application provides a second communication method, please refer to Figure 6, which is a flowchart of the method.

[0145] S601: The first device sends first capability information to the second device, the first capability information including a first relationship, which is the relationship between a first quantity and the number of symbols and / or comb tooth size of the SL-PRS. Accordingly, the second device receives the first relationship.

[0146] The relevant descriptions of the first device, the second device, and the first quantity can be found in the relevant descriptions of the first device and the second device in S501, and will not be repeated here.

[0147] The first relationship can be between the first quantity and the number of symbols in the SL-PRS, or it can be between the first quantity and the comb size, or it can be between the first quantity and the number of symbols in the SL-PRS and the comb size. The number of symbols in the lateral positioning reference signal is the number of symbols used for lateral positioning reference signals within one time slot.

[0148] Optionally, the first relation is the relationship between the first quantity and the number of symbols in SL-PRS, and the first relation can satisfy Formula 2 or Formula 3 below. N PSCCH ={floor(K / (M+1))*M} (Formula 2) NPSCCH ={floor(K / M)*M} (Formula 3)

[0149] Alternatively, the first relationship is the relationship between the first quantity and the comb size, and this first relationship can satisfy either Formula 4 or Formula 5. PSCCH ={floor(K / (N+1))*N} (Formula 4) N PSCCH ={floor(K / N)*N} (Formula 5)

[0150] Alternatively, the first relation is the relationship between the number of symbols in SL-PRS, the first quantity, and the comb size. This first relation can satisfy the following formula 6. N PSCCH ={floor(K / (M+1))*N} (Formula 6)

[0151] In the above formula 2 to formula 6, N PSCCH Let M be the first quantity, N be the number of symbols in the SL-PRS, and K be a constant. K can take any integer value from 9 to 14. Optionally, K = 10, and formulas 2 to 6 above can be rewritten as formulas 7 to 11. PSCCH ={floor(10 / (M+1))*M} (Formula 7) N PSCCH ={floor(10 / M)*M} (Formula 8) N PSCCH ={floor(10 / (N+1))*N} (Formula 9) N PSCCH ={floor(10 / N)*N} (Formula 10) N PSCCH ={floor(10 / (M+1))*N} (Formula 11)

[0152] The second device can determine the first quantity based on the first relationship included in the first capability information. Taking the first relationship included in the first capability information as an example, the determination of the first quantity by the second device based on the first relationship included in the first capability information is described.

[0153] Please refer to Figure 3. The combinations of M and N supported by the dedicated resource pool can be: (M, N) = (1, 2), (2, 2), (2, 4), (4, 4), (6, 6). Among them, for (M, N) = (1, 2), the first quantity calculated by the second device according to Formula 7 is 5, the first quantity calculated according to Formula 8 is 10, the first quantity calculated according to Formula 9 is 6, the first quantity calculated according to Formula 10 is 10, and the first quantity calculated according to Formula 11 is 10.

[0154] For (M, N) = (2, 2), the first quantity calculated by the second device according to Formula 7 is 6, the first quantity calculated according to Formula 8 is 10, the first quantity calculated according to Formula 9 is 6, the first quantity calculated according to Formula 10 is 10, and the first quantity calculated according to Formula 11 is 6.

[0155] For (M, N) = (2, 4), the first quantity calculated by the second device according to Formula 7 is 6, the first quantity calculated according to Formula 8 is 10, the first quantity calculated according to Formula 9 is 8, the first quantity calculated according to Formula 10 is 10, and the first quantity calculated according to Formula 11 is 12.

[0156] For (M, N) = (4, 4), the first quantity calculated by the second device according to Formula 7 is 8, the first quantity calculated according to Formula 8 is 10, the first quantity calculated according to Formula 9 is 8, the first quantity calculated according to Formula 10 is 10, and the first quantity calculated according to Formula 11 is 8.

[0157] For (M, N) = (6, 6), the first quantity calculated by the second device according to Formula 7 is 6, the first quantity calculated according to Formula 8 is 10, the first quantity calculated according to Formula 9 is 6, the first quantity calculated according to Formula 10 is 10, and the first quantity calculated according to Formula 11 is 6.

[0158] Optionally, the first capability information can be carried in the first signaling and / or the second signaling. The first signaling indicates that the first device can receive SL-PRS in the dedicated resource pool. For example, the first signaling is signaling 41-1-3 in UE feature 41-1-3. Please refer to Table 9 for the syntax of UE feature 41-1-3.

[0159] Table 9

[0160] In Table 9, X is the first quantity, used to determine the first relationship of X, taking the above formula 11 as an example.

[0161] The second signaling is used to indicate that the first device can transmit SL-PRS through full detection in the dedicated resource pool. For example, the second signaling is signaling 41-1-10 in UE feature 41-1-3. Please refer to Table 10 for the corresponding UE feature 41-1-3. Currently, the second signaling does not carry the first capability information. In this embodiment, the reporting of the first capability information is added to the second signaling.

[0162] Table 10

[0163] In Table 10, X is the first quantity, used to determine the first relationship of X, taking the above formula 11 as an example.

[0164] Optionally, the first capability information can be carried in an RRC message and / or an SLPP message. For a description of the first capability information carried in an RRC message and / or an SLPP message, please refer to the relevant description in S501, which will not be repeated here.

[0165] Optionally, the first device may send the first capability information to the second device after receiving a request information from the second device. Therefore, before executing S601, S602 may also be executed: the second device sends capability request information to the first device. Correspondingly, the first device receives the capability request information. The relevant description of S602 can be found in the relevant description of S502, and will not be repeated here.

[0166] In the above technical solution, the first relationship is the relationship between the first quantity and the number of symbols and / or comb size of the side-link positioning reference signal. Currently, the number of SL-PRS resources that a UE can transmit in a time slot is determined by the number of symbols and comb size of the side-link positioning reference signal. Therefore, the first quantity determined according to the first relationship has a high probability of matching with the number of SL-PRS resources that a UE can transmit in a time slot, which helps to improve the probability of one-to-one mapping between PSCCH and SL-PRS resources.

[0167] This application provides a third communication method, please refer to Figure 7, which is a flowchart of the method.

[0168] S701: The first device sends first capability information to the second device, the first capability information including a second relationship, which is the relationship between the first quantity and the RB quantity. Accordingly, the second device receives the first relationship.

[0169] The number of resource blocks is the total number of Resource Blocks (RBs) included in the BWP corresponding to the dedicated resource pool. The second relationship can satisfy either Formula 12 or Formula 13. NPSCCH ={floor(N RB / 10)} (Formula 12) N PSCCH =2*{floor(N RB / 10)} (Formula 13)

[0170] Where, N PSCCH N is the first quantity. RB This represents the total number of RBs included in the BWP.

[0171] The second device can determine the first quantity based on the second relationship in the first capability information. Taking the aforementioned Formula 1 as an example, the first quantity determined by the second device can be referred to X in Table 1, which will not be elaborated here.

[0172] The first capability information is carried in the second signaling, which indicates that the first device can transmit SL-PRS through full detection in the dedicated resource pool. For example, the second signaling is signaling 41-1-10 in UE feature 41-1-3, and the corresponding UE feature 41-1-3 is shown in Table 11. Currently, the second signaling does not carry the first capability information. In this embodiment, the reporting of the first capability information is added to the second signaling.

[0173] Table 11

[0174] In Table 11, X is the first quantity, and the second relationship used to determine X is exemplified by Formula 12 above.

[0175] Optionally, the first capability information can be carried in an RRC message and / or an SLPP message. For a description of the first capability information carried in an RRC message and / or an SLPP message, please refer to the relevant description in S501, which will not be repeated here.

[0176] Optionally, the first device may send the first capability information to the second device after receiving a request information from the second device. Therefore, before executing S601, S702 can also be executed: the second device sends capability request information to the first device. Correspondingly, the first device receives the capability request information. The description of S702 can be found in the description of S502, and will not be repeated here.

[0177] In the above technical solution, adding first capability information to the second signaling enables a one-to-one mapping between PSCCH and SL-PRS resources when the first device transmits SL-PRS via sidelink Mode 2.

[0178] It is understood that, in the embodiments of this application, the first capability information carried by the first signaling and the second signaling can be the same or decoupled. For example, the information included in the first signaling is shown in Table 2, and the information included in the second signaling can be shown in Table 6, or in Tables 7, 8, 10 or 11. The embodiments of this application do not limit this.

[0179] Optionally, the second device may include a terminal device and / or a network device (as shown in scenarios (a) to (c) of Figure 4). When the devices included in the second device are different, the methods that the first device can execute after sending the first capability information (e.g., after executing S501, S601, or S701) are also different. The following uses examples from Figure 4 (a) to (c) to illustrate the steps that the first device can still execute after sending the first capability information.

[0180] Please refer to Figure 8(a), taking the scenario shown in Figure 4(a) as an example, where the first device and the second device are the same. The first device is terminal 10, and the second device is terminal 20.

[0181] S801: Terminal 10 sends an SL-PRS to terminal 20. Correspondingly, terminal 20 receives the SL-PRS.

[0182] Terminal 10 can send SL-PRS to terminal 20 via sidelink Mode 1, or terminal 10 can send SL-PRS to terminal 20 via sidelink Mode 2. This SL-PRS is used for sidelink positioning.

[0183] Optionally, the SL-PRS resources used by terminal 10 when sending SL-PRS to terminal 20 via sidelink Mode 1 can come from either the network device or terminal 20. For example, after terminal 10 sends first capability information to terminal 20, terminal 20 can send the first capability information to the network device and send the SL-PRS resources configured by the network device based on the first capability information to terminal 10. Alternatively, before executing S501, terminal 10 can also send the first capability information to the network device and receive the SL-PRS resources configured by the network device based on the first capability information. Or, terminal 10 can also receive SL-PRS resources from terminal 20. The relevant description of the first capability information can be found in the relevant description of the first capability information in S501, and will not be repeated here. (Network device)

[0184] Please refer to Figure 8(b), taking the scenario shown in Figure 4(b) as an example, where the first device and the second device are the same. The first device is terminal 30, and the second device is RSU 1.

[0185] S802: RSU 1 configures SL-PRS resources based on a first quantity and sends the SL-PRS resources to terminal 30. Correspondingly, terminal 30 receives the SL-PRS resources.

[0186] S803: Terminal 30 receives SL-PRS on this SL-PRS resource.

[0187] SL-PRS is used for sidelink positioning.

[0188] Please refer to Figure 8(c), taking the scenario shown in Figure 4(c) as an example, where the first device and the second device are the same. The first device is terminal 50, and the second device is base station 60 and terminal 40.

[0189] S804: Base station 60 configures SL-PRS resources based on a first quantity and sends the SL-PRS resources to terminal 50. Correspondingly, terminal 50 receives the SL-PRS resources.

[0190] After receiving the SL-PRS resource, terminal 50 can execute S805 and / or S806. If S805 and S806 need to be executed, they can be executed simultaneously, or S805 can be executed before or after S806; this embodiment does not limit this.

[0191] S805: Terminal 50 receives SL-PRS on this SL-PRS resource.

[0192] S806: Terminal 50 sends SL-PRS to terminal 40.

[0193] Specifically, terminal 50 can send SL-PRS to terminal 40 via the SL-PRS resource in S804 (i.e., via sidelink Mode 1), or terminal 50 can send SL-PRS to terminal 40 via sidelink Mode 2. This SL-PRS is used for sidelink positioning.

[0194] Figure 9 shows a schematic diagram of a communication device provided in an embodiment of this application. The communication device 900 can be a UE or its circuit system as described in any of the embodiments shown in Figures 5 to 8, used to implement the method corresponding to the UE in the above method embodiments. Alternatively, the communication device 900 can be a network device or its circuit system as described in any of the embodiments shown in Figures 5 to 8, used to implement the method corresponding to the network device in the above method embodiments. For example, one type of circuit system is a chip system.

[0195] The communication device 900 includes at least one processor 901. The processor 901 can be used for internal processing within the device to implement certain control processing functions. Optionally, the processor 901 includes instructions. Optionally, the processor 901 can store data. Optionally, different processors can be independent devices, located in different physical locations, or located on different integrated circuits. Optionally, different processors can be integrated into one or more processors, for example, integrated on one or more integrated circuits.

[0196] Optionally, the communication device 900 includes one or more memories 903 for storing instructions. Optionally, the memories 903 may also store data. The processor and the memories may be separate or integrated together.

[0197] Optionally, the communication device 900 includes a communication line 902 and at least one communication interface 904. Since the memory 903, communication line 902, and communication interface 904 are all optional, they are all represented by dashed lines in Figure 9.

[0198] Optionally, the communication device 900 may further include a transceiver and / or an antenna. The transceiver can be used to send information to or receive information from other devices. The transceiver may be referred to as a transceiver unit, transceiver circuit, input / output interface, etc., and is used to realize the transmission and reception functions of the communication device 900 via the antenna. Optionally, the transceiver includes a transmitter and a receiver. For example, the transmitter can be used to generate a radio frequency (RF) signal from a baseband signal, and the receiver can be used to convert the RF signal back into a baseband signal.

[0199] The processor 901 may include a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the present application.

[0200] Communication line 902 may include a path for transmitting information between the aforementioned components.

[0201] Communication interface 904 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), wired access network, etc.

[0202] Memory 903 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. Memory 903 may exist independently and be connected to processor 901 via communication line 902. Alternatively, memory 903 may be integrated with processor 901.

[0203] The memory 903 stores computer execution instructions for implementing the present application's solution, and its execution is controlled by the processor 901. The processor 901 executes the computer execution instructions stored in the memory 903, thereby implementing the steps performed by the terminal device or network device in any of the embodiments shown in Figures 5 to 8.

[0204] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0205] In a specific implementation, as one example, processor 901 may include one or more CPUs, such as CPU0 and CPU1 in FIG9.

[0206] In a specific implementation, as one embodiment, the communication device 900 may include multiple processors, such as processors 901 and 905 in FIG. 9. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. Here, a processor may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0207] When the device shown in Figure 9 is a chip, such as a chip for a network device or terminal device, the chip includes a processor 901 (and may also include a processor 905), a communication line 902, and a communication interface 904. Optionally, it may include a memory 903. Specifically, the communication interface 904 may be an input interface, pins, or circuits, etc. The memory 903 may be a register, cache, etc. The processor 901 and processor 905 may be a general-purpose CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of a program that controls the communication method of any of the above embodiments.

[0208] This application embodiment can divide the device into functional modules according to the above method examples. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or software functional modules. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. For example, when dividing each functional module according to its own function, Figure 10 shows a schematic diagram of a device. The device 1000 can be the network device or terminal device involved in the above method embodiments, or a chip in the network device or terminal device. The device 1000 includes a transmitting unit 1001, a processing unit 1002, and a receiving unit 1003.

[0209] It should be understood that the device 1000 can be used to implement the steps performed by the network device or the terminal device in the communication method of the embodiments of this application. The relevant features can be referred to any embodiment in any of the figures shown in Figures 5 to 8 above, and will not be repeated here.

[0210] Optionally, the functions / implementation processes of the transmitting unit 1001, receiving unit 1003, and processing unit 1002 in Figure 10 can be implemented by the processor 901 in Figure 9 calling computer execution instructions stored in the memory 903. Alternatively, the functions / implementation processes of the processing unit 1002 in Figure 10 can be implemented by the processor 901 in Figure 9 calling computer execution instructions stored in the memory 903, and the functions / implementation processes of the transmitting unit 1001 and receiving unit 1003 in Figure 10 can be implemented by the communication interface 904 in Figure 9.

[0211] Optionally, when the device 1000 is a chip or circuit, the functions / implementation of the transmitting unit 1001 and the receiving unit 1003 can also be implemented through pins or circuits, etc.

[0212] This application also provides a computer-readable storage medium storing a computer program or instructions that, when executed, implement the methods performed by the network device or terminal device in the aforementioned method embodiments. Thus, the functions described in the above embodiments can be implemented as software functional units and sold or used as independent products. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to it, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, network device, or terminal device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0213] This application also provides a computer program product comprising: computer program code, which, when run on a computer, causes the computer to perform the method executed by the network device or terminal device in any of the foregoing method embodiments.

[0214] This application also provides a processing apparatus, including a processor and an interface; the processor is used to execute the methods performed by the network device or terminal device involved in any of the above method embodiments.

[0215] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0216] The various illustrative logic units and circuits described in the embodiments of this application can be implemented or operate the described functions using a general-purpose processor, digital signal processor (DSP), ASIC, field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The general-purpose processor can be a microprocessor; alternatively, it can be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented using a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0217] The steps of the methods or algorithms described in the embodiments of this application can be directly embedded in hardware, software units executed by a processor, or a combination of both. The software units can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (EPROM), EEPROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and storage medium can be disposed in an ASIC, which can be disposed in a network device or a terminal device. Optionally, the processor and storage medium can also be disposed in different components of a network device or a terminal device.

[0218] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0219] The contents of the various embodiments of this application can be referenced to each other. Unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0220] It is understood that in the embodiments of this application, the network device or terminal device may execute some or all of the steps in the embodiments of this application. These steps or operations are merely examples. In the embodiments of this application, other operations or variations of various operations may also be performed. Furthermore, the steps may be executed in different orders as presented in the embodiments of this application, and it is not necessary to execute all the operations in the embodiments of this application.

Claims

1. A communication method, characterized in that, The method includes: Send first capability information; The first capability information includes one or more quantities, which are used to determine a first quantity, which is the maximum number of physical sidelink control channels (PSCCHs) that the first device can receive in a time slot within the sidelink positioning dedicated resource pool.

2. The method as described in claim 1, characterized in that, The first quantity is included in the one or more quantities.

3. The method as described in claim 2, characterized in that, The combinations corresponding to the one or more quantities include: {4, 8} or {4, 6, 8, 12}.

4. The method according to any one of claims 1 to 3, characterized in that, The number of one or more items is related to the comb size.

5. The method as described in claim 1, characterized in that, The one or more quantities include a second quantity, which is the maximum number of active-side link positioning reference signal resources corresponding to the processing capacity of all configured resource pools of the first device in a time slot, and the second quantity is used to determine the first quantity.

6. A communication method, characterized in that, Applied to a first device, the method includes: Send first capability information; The first capability information includes a first relationship, which is the relationship between a first quantity and the number of symbols and / or comb size of the sidelink positioning reference signal. The first quantity is the maximum number of physical sidelink control channels (PSCCHs) that the first device can receive in a time slot within the sidelink positioning dedicated resource pool.

7. The method as described in claim 6, characterized in that, The first relationship is the relationship between a first quantity and the comb size, and the first relationship includes: N PSCCH ={floor(K / (N))*N} or, N PSCCH ={floor(K / (N+1))*N} Where, N PSCCH Where N is the first quantity, N is the comb size, and K is any integer value from 9 to 14.

8. The method as described in claim 6, characterized in that, The first relationship is the relationship between the first quantity and the number of symbols and comb size of the side-link positioning reference signal. The first relationship includes: N PSCCH ={floor(K / (M+1))*N} Where, N PSCCH M is the first quantity, N is the number of symbols in the side link positioning reference signal, K is the comb size, and K is any integer value from 9 to 14.

9. The method as described in claim 6, characterized in that, The first relationship is the relationship between a first quantity and the number of symbols in the side-link positioning reference signal, and the first relationship includes: N PSCCH ={floor(K / (M))*M} or, N PSCCH ={floor(K / (M+1))*M} Where, N PSCCH M is the first quantity, M is the number of symbols of the side link positioning reference signal, and K is any integer value from 9 to 14.

10. The method according to any one of claims 1 to 9, characterized in that, The first capability information is carried in the first signaling and / or the second signaling; wherein, The first signaling is used to indicate that the first device is capable of receiving a sidelink positioning reference signal in the sidelink positioning dedicated resource pool; The second signaling is used to indicate that in the sidelink positioning dedicated resource pool, the first device can transmit the sidelink positioning reference signal in a full-detection manner.

11. The method according to any one of claims 1 to 10, characterized in that, The first capability information is carried in the Radio Resource Control (RRC) message and / or the sidelink positioning protocol.

12. A communication method, characterized in that, Applied to a first device, the method includes: Send first capability information; The first capability information includes a second relationship, which is the relationship between a first quantity and a resource block quantity. The first quantity is the maximum number of physical sidelink control channels (PSCCHs) that the first device can receive in a time slot in the sidelink positioning dedicated resource pool. The resource block quantity is the total number of resource blocks included in the partial bandwidth corresponding to the sidelink positioning dedicated resource pool. The first capability information is carried on a second signaling signal, which indicates that in the sidelink positioning dedicated resource pool, the first device can transmit the sidelink positioning reference signal in a full-detection manner.

13. A communication device, characterized in that, It includes units or modules for performing the method as described in any one of claims 1 to 12.

14. A communication device, characterized in that, include: Processor, memory, and computer programs; The computer program is stored in the memory, and when the computer program is executed by the processor, it causes the communication device to perform the method as described in any one of claims 1 to 12.

15. A chip system, characterized in that, The chip system includes at least one processor, which is used to read and execute a program stored in the memory to implement the method as described in any one of claims 1 to 12.

16. A readable storage medium, characterized in that, The readable storage medium includes a program that, when run on the device, causes the device to perform the method as described in any one of claims 1 to 12.

17. A computer program product, characterized in that, The computer program product includes a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1 to 12.

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