Bylink SL reference signal transmission method and device, terminal and readable storage medium

Abstract

The invention discloses a side link SL reference signal transmission method and device, a terminal and a readable storage medium, and belongs to the technical field of communication, and the SL reference signal transmission method comprises the steps that the terminal obtains configuration information of a resource pool; the terminal sends a physical side link channel in a frequency domain interleaving mode on a first time unit indicated by the configuration information, and sends an SL reference signal in a continuous resource block RB mode; wherein the physical side link channel and the SL reference signal share the resource pool.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a SL reference signal transmission method, device, terminal and readable storage medium. Background Art

[0002] At present, in the sidelink (SL) positioning of R18, it is stipulated that the terminal can send a sidelink positioning reference signal (SL-PRS) in the shared resource pool (Shared Resource Pool), and the bandwidth of the SL-PRS is less than or equal to the physical sidelink shared channel (PSSCH) sent by the terminal in the Shared Resource Pool. In this way, during SL positioning, the terminal can directly use the resources in the Shared Resource Pool to send SL-PRS to other terminals, so that other terminals can perform SL positioning based on the SL-PRS.

[0003] However, after the terminal uses the resources in the Shared Resource Pool to send the SL-PRS to other terminals, other terminals may not be able to accurately perform SL positioning according to the SL-PRS, resulting in poor positioning accuracy of SL positioning. Summary of the invention

[0004] The embodiments of the present application provide a SL reference signal transmission method, device, terminal and readable storage medium, which can solve the problem of poor SL positioning accuracy.

[0005] In a first aspect, a SL reference signal transmission method is provided, which is executed by a terminal, and the method includes: the terminal obtains configuration information of a resource pool; the terminal sends a physical sidelink channel in a frequency domain interleaving Interlace manner on a first time unit indicated by the configuration information, and sends the SL reference signal in a continuous resource block RB manner; wherein the above-mentioned physical sidelink channel and the SL reference signal share the resource pool.

[0006] In a second aspect, a SL reference signal transmission device is provided, and the SL reference signal transmission device includes: an acquisition module and a sending module. The acquisition module is used to obtain configuration information of a resource pool. The sending module is used to send a physical sidelink channel in a frequency domain interlace manner on a first time unit indicated by the configuration information obtained by the acquisition module, and send an SL reference signal in a continuous RB manner; wherein the above-mentioned physical sidelink channel and the SL reference signal share the resource pool.

[0007] In a third aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0008] In a fourth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to obtain configuration information of a resource pool; and at a first time unit indicated by the configuration information, a physical sidelink channel is sent in a frequency domain interlace manner, and a SL reference signal is sent in a continuous RB manner; wherein the above-mentioned physical sidelink channel and the SL reference signal share the resource pool.

[0009] In a fifth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0010] In a sixth aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

[0011] In a seventh aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect.

[0012] In an embodiment of the present application, a terminal may obtain configuration information of a resource pool, and send a physical sidelink channel in a frequency domain interlace manner, and send a SL reference signal in a continuous RB manner, at a first time unit indicated by the configuration information; wherein the physical sidelink signal and the SL reference signal share the resource pool. Since the terminal can use the resources in the resource pool to send the physical sidelink channel in a frequency domain interlace manner in the same time unit indicated by the configuration information of the resource pool, and send the SL reference signal in a continuous RB manner, instead of using the resources in the resource pool to send the SL reference signal in a frequency domain interlace manner, the continuity of the SL reference signal in frequency domain transmission can be ensured, and the performance of other terminals in processing the SL reference signal can be guaranteed, so that other terminals can accurately perform SL positioning based on the SL reference signal, thereby improving the positioning accuracy of SL positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a block diagram of a wireless communication system provided by an embodiment of the present application;

[0014] Figure 2 This is one of the flowcharts of the SL reference signal transmission method provided in an embodiment of the present application;

[0015] Figure 3A It is one of the resource diagrams for the terminal to send PSSCH and SL reference signals;

[0016] Figure 3B This is the second schematic diagram of resources for the terminal to send PSSCH and SL reference signals;

[0017] Figure 4 This is the second flow chart of the SL reference signal transmission method provided in the embodiment of the present application;

[0018] Figure 5 This is the third schematic diagram of resources for the terminal to send PSSCH and SL reference signals;

[0019] Figure 6 is a structural diagram of an SL reference signal transmission device provided in an embodiment of the present application;

[0020] Figure 7 It is a schematic diagram of the hardware structure of the communication device provided in the embodiment of the present application;

[0021] Figure 8 It is a schematic diagram of the hardware structure of the terminal provided in the embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0023] The terms involved in the embodiments of the present application are explained below.

[0024] 1. Sidelink (SL)

[0025] Currently, the New Radio (NR) system supports SL transmission, which is used for direct data transmission between terminals without going through network-side devices. The NR system supports unicast, multicast or broadcast SL transmission.

[0026] Among them, NRSL transmission involves the following channels:

[0027] Physical Sidelink Control Channel (PSCCH);

[0028] Physical Sidelink Shared Channel (PSSCH);

[0029] Physical Sidelink Broadcast Channel (PSBCH);

[0030] Physical Sidelink Discovery Feedback Channel (PSFCH).

[0031] 2. Sidelink Control Information (SCI)

[0032] Currently, in R17 SL, a two-level SCI design is defined:

[0033] The first-level SCI (i.e., SCI format 1-A) is carried in the PSCCH channel and carries the following contents: priority, frequency domain resource allocation, time domain resource allocation, resource reservation period, demodulation reference signal (DMRS) style, second-level SCI format, bit beta offset value indication, number of DMRS ports, modulation and coding scheme (MCS), MCS table indication information, PSFCH overhead indication information, reserved resource information, and conflict information reception flag;

[0034] The second-level SCI (i.e., SCI format 2-A, SCI format 2-B, SCI format 2-C) is carried in the PSSCH. The format of the second-level SCI is indicated by the first SCI. The second-level SCI starts in the symbol of the first DMRS carried in the PSSCH and is mapped in ascending order of the PSSCH symbols.

[0035] Among them, SCIformat2-A is used for decoding of PSSCH, and the feedback information considered includes the scenarios of determining ACK and negative NACK, or the feedback scenario of negative NACK-only, or the scenario of no feedback. The contents carried are as follows: Hybrid Automatic Repeat reQuest Process Number (HARQProcess Number), New Data Indicator (NDI), Redundancy Version (RV), Source ID, Destination ID, HARQ Feedback Enabled / Disabled Indicator, Cast Type Indicator (CTI), Channel State Information (CSI) request.

[0036] SCI format 2-B is used for decoding of PSSCH, considering the scenario of feedback information only NACK, or the scenario of no feedback information. The contents carried are as follows: HARQ Process Number, NDI, RV, Source ID, Destination ID, HARQ Feedback Enabled / Disabled Indicator, Zone ID, and Communication Range requirement.

[0037] SCI format 2-C is used for decoding of PSSCH. It carries coordination information between terminals or requests for coordination information between terminals. The contents carried are as follows: HARQ Process Number, NDI, RV, Source ID, Destination ID, HARQ Feedback Enabled / Disabled Indicator, CSI request, Providing / Requesting Indicator. When Providing / Requesting Indicator is 0, it also includes Resource Combinations, First Resource Location, Reference Slot Location, Resource Set Type, Lowest Subchannel Indices; when Providing / Requesting Indicator is 1, it also includes Priority, Number Of Subchannels, Resource Reservation Period, Resource Selection Window Location, and Padding Bit.

[0038] The first-level SCI is carried in the PSCCH, and the second-level SCI is carried in the PSSCH.

[0039] 3. SL Positioning

[0040] At present, R18 introduces the SL positioning reference signal (PRS) in positioning, and the SL-PRS is used for SL positioning. Among them, in SL positioning, scheme 1 is supported based on the resource allocation method of SL-PRS scheduled by the network, and scheme 2 is supported based on the resource allocation method of SL-PRS selected autonomously by the terminal. Dynamic scheduling is supported in Scheme 1, and resource allocation of configured grant type (Configured Grant Type) 1 / type 2 is configured. Downlink control information (DCI) may be used for resource scheduling / activation / release. The resource allocation selected autonomously by the terminal includes sensing-based resource selection and random resource selection methods. SCI exists for resource scheduling.

[0041] In addition, SL-PRS can be located in a dedicated resource pool or a shared resource pool. If it is a SL-PRS dedicated resource pool, PSCCH and SL-PRS exist in the SL-PRS dedicated resource pool. Single Stage SCI is used in the dedicated resource pool, and Single Stage SCI is carried on PSCCH, and Single Stage SCI is used to schedule SL-PRS. If it is a shared resource pool, backward compatibility with SL services needs to be considered, that is, information is transmitted in the same resource pool as R16 / R17, and the impact on the transmission performance of R16 / R17 terminals is reduced. The information transmitted in the shared resource pool may include PSCCH, PSSCH and SL-PRS. Two-stage SCI scheduling information is used in the shared resource pool. The first (1st) SCI is carried on PSCCH, and the second (2nd) SCI is carried on PSSCH.

[0042] In SL positioning, SL-PRS supports time division multiplexing (TDM) multiplexing in the slot at the symbol level, and frequency division multiplexing (FDM) multiplexing in the resource block (RB) / subchannel at the resource element (RE) level, or a comb-based multiplexing method.

[0043] 4. Other terms

[0044] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited, for example, the first time unit can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0045] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0046] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 thGeneration, 6G) communication system.

[0047] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B, a Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0048] The SL reference signal transmission method provided in the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0049] Currently, in the SL positioning of R18, it is stipulated that the terminal can send a sidelink positioning reference signal (Sidelink Positioning Reference Signal, SL-PRS) in the shared resource pool (Shared Resource Pool), and the bandwidth of the SL-PRS is less than or equal to the physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) sent by the terminal in the Shared Resource Pool. In this way, during SL positioning, the terminal can directly use the resources in the Shared Resource Pool to send SL-PRS to other terminals, so that other terminals can perform SL positioning based on the SL-PRS.

[0050] However, in the process of applying the above scheme, the applicant found that, since an interlaced transmission (Interlaced-Based Transmission) structure can be used when sending the above PSSCH in the Shared Resource Pool, and R18 stipulates that the bandwidth of SL-PRS is less than or equal to the PSSCH, the Interlaced-Based Transmission structure should also be used when sending SL-PRS. However, when the Interlaced-Based Transmission structure is used to send SL-PRS, the transmission of SL-PRS in the frequency domain will be discontinuous, and the performance of other terminals receiving SL-PRS when processing SL-PRS will be destroyed, resulting in the situation that after the terminal uses the resources in the Shared Resource Pool to send SL-PRS to other terminals, other terminals cannot accurately perform SL positioning according to the SL-PRS, thus resulting in poor positioning accuracy of SL positioning. In addition, since the terminal uses continuous RBs to send SL reference signals, and the SL reference signal is a Comb structure, comb-level FDM of different terminals can be enabled to ensure resource utilization.

[0051] In order to solve the above technical problems, an embodiment of the present application provides a SL reference signal transmission method. Figure 2 FIG. 1 is a flow chart showing a method for transmitting a SL reference signal provided in an embodiment of the present application. Figure 2 As shown, a SL reference signal transmission method provided in an embodiment of the present application may include the following steps 101 and 102.

[0052] Step 101: The terminal obtains configuration information of a resource pool.

[0053] In some embodiments of the present application, the resource pool may specifically be a Shared Resource Pool.

[0054] In some embodiments of the present application, the above configuration information may include at least one of the following: information on time domain resources in the resource pool, information on frequency domain resources in the resource pool, bandwidth of the resource pool, etc.

[0055] In some embodiments of the present application, the terminal may obtain configuration information of the resource pool from a network side device.

[0056] Step 102: The terminal sends a physical sidelink channel in a frequency domain interlace manner at a first time unit indicated by the configuration information, and sends an SL reference signal in a continuous RB manner.

[0057] In an embodiment of the present application, the above-mentioned physical sidelink channel and the SL reference signal share the above-mentioned resource pool.

[0058] In some embodiments of the present application, the first time unit may include any of the following: frame, subframe, time slot, mini-time slot, orthogonal frequency division multiplexing (OFDM) symbol, etc. The first time unit may specifically be any time unit of the time domain resources in the resource pool.

[0059] Optionally, the first time unit may specifically be a time slot.

[0060] In some embodiments of the present application, the above-mentioned physical sidelink channel may include at least one of the following: PSCCH, PSSCH, PSFCH, PSBCH.

[0061] Optionally, the above-mentioned physical sidelink channel may specifically be a physical channel including PSCCH and PSSCH.

[0062] In the embodiment of the present application, the terminal may send a physical sidelink channel in an Interlace RB-Based Transmission structure. It is understood that the terminal may use the Interlace RB in the resource pool to send the physical sidelink channel. The RB may be a physical resource block (PRB).

[0063] In some embodiments of the present application, when the physical sidelink channel includes PSCCH and PSSCH, each resource block set RB set allocated for the PSSCH and the frequency domain unit allocated in each RB set are indicated by the PSCCH. Among them, RB set is also called LBT subband, which indicates the bandwidth granularity of unlicensed frequency band transmission. Among them, the frequency domain unit allocated in each RB set may include any of the following: subchannel, interlace.

[0064] Optionally, a subchannel may be equivalent to one or more interlaces.

[0065] In some embodiments of the present application, the above-mentioned SL reference signal may specifically be a SL-PRS.

[0066] In the embodiment of the present application, the terminal may send the SL reference signal in a contiguous RB-Based Transmission structure. It is understood that the terminal may use the continuous RBs in the resource pool to send the SL reference signal. The RB may be a PRB.

[0067] In some embodiments of the present application, the physical sidelink channel (such as PSSCH) occupies at least one first resource block set RB set, and the first frequency domain range occupied by the SL reference signal is determined by at least one of the following:

[0068] A frequency domain range from the second RB set to the third RB set;

[0069] A frequency domain range from a first frequency domain unit with the lowest frequency domain position in the second RB set to a first frequency domain unit with the highest frequency domain position in the third RB set;

[0070] A frequency domain range from a first frequency domain unit with a smallest index in the second RB set to a first frequency domain unit with a largest index in the third RB set;

[0071] Resource pool bandwidth.

[0072] In an embodiment of the present application, the first frequency domain range occupied by the SL reference signal can be understood as the RB position allocated (or occupied) by the SL reference signal, and the RB position is also called frequency domain allocation (Frequency Domain Allocation), that is, the bandwidth of the SL reference signal.

[0073] In the embodiment of the present application, the second RB set is: an RB set with the lowest frequency domain position in at least one first RB set, and the third RB set is: an RB set with the highest frequency domain position in at least one first RB set.

[0074] In some embodiments of the present application, when the first frequency domain range is determined by the frequency domain range from the second RB set to the third RB set, the RB position of the first frequency domain range may specifically include: the frequency domain range of all RBs from the second RB set to the third RB set.

[0075] In some embodiments of the present application, the first frequency domain unit may specifically be any one of the following: a subchannel, or an interlace.

[0076] In some embodiments of the present application, when the first frequency domain range is determined by the frequency domain range from the first frequency domain unit with the lowest frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set, the RB position of the first frequency domain range may specifically include: the frequency domain range of all RBs from the first frequency domain unit with the lowest frequency domain position to the first frequency domain unit with the highest frequency domain position.

[0077] There are multiple first frequency domain units allocated to the physical sidelink channel in each RB set, and the lowest or highest first frequency domain unit is the lowest or highest first frequency domain unit among the multiple first frequency domain units allocated to the physical sidelink channel.

[0078] In some embodiments of the present application, the frequency domain range is from the first frequency domain unit with the smallest index in the second RB set to the first frequency domain unit with the largest index in the third RB set. That is, there are multiple first frequency domain units allocated to the physical sidelink channel in each RB set, and the first frequency domain unit with the smallest or largest index is the first frequency domain unit with the smallest or largest index among the multiple first frequency domain units allocated to the physical sidelink channel.

[0079] Optionally, the first frequency domain range can also be the frequency domain range from the first frequency domain unit with the largest index in the second RB set to the first frequency domain unit with the largest index in the third RB set, or, the frequency domain range from the first frequency domain unit with the smallest index in the second RB set to the first frequency domain unit with the smallest index in the third RB set, or, the frequency domain range from the first frequency domain unit with the largest index in the second RB set to the first frequency domain unit with the smallest index in the third RB set.

[0080] In some embodiments of the present application, when the first frequency domain range is determined by the above-mentioned resource pool bandwidth, the RB position of the first frequency domain range may specifically be the frequency domain range of all RBs in the resource pool bandwidth.

[0081] It can be seen that since the first frequency domain range occupied by the SL reference signal is determined by at least one of the frequency domain range from the second RB set to the third RB set, the frequency domain range from the first frequency domain unit at the frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set, and the resource pool bandwidth, the terminal can directly determine the first frequency domain range according to at least one of the frequency domain range between the second RB set and the third RB set, the frequency domain range from the first frequency domain unit at the frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set, and the resource pool bandwidth. Therefore, the problem that the terminal cannot determine the frequency domain range occupied by the SL reference signal because the method for determining the first frequency domain range is not specified in the relevant technology is solved.

[0082] In some embodiments of the present application, if the first frequency domain range includes continuous RB sets, the terminal sends the SL reference signal in the protection bandwidth between the continuous RB sets.

[0083] For example, Figure 3A As shown, the terminal sends PSSCH in a frequency domain interlace manner. The PSSCH occupies two RB sets, namely, the 1st RB set and the 2nd RB set. Each RB set occupies two frequency domain units (such as Subchannel or Interlace), such as frequency domain unit 1 and frequency domain unit 2. The 1st RB set and the 2nd RB set include a guard bandwidth (Guard band) 1. Figure 3B As shown, the terminal can send the SL reference signal in a continuous RB manner, and the terminal will send the SL reference signal in Guard band 1. It can be understood that the bandwidth of the SL reference signal is all RBs (or PRBs) in the RB set occupied by PSSCH (ie, 1stRB set and 2nd RB set).

[0084] It can be seen that, since the first frequency domain range includes continuous RB sets, the terminal will also send SL reference signals in the protection bandwidth between continuous RB sets. Therefore, the continuity of the SL reference signal transmission in the frequency domain can be achieved, and the performance of other terminals in processing the SL reference signal can be guaranteed, so that other terminals can accurately perform SL positioning based on the SL reference signal. In addition, the protection bandwidth is generally used to avoid interference between transmissions between different RB sets by different terminals during unlicensed frequency band transmissions. Since continuous RB sets are used for transmission by the same terminal, different RB sets will not interfere or affect each other. The protection bandwidth between continuous RB sets can also be used to improve resource utilization and SL positioning accuracy.

[0085] In some embodiments of the present application, at least some RBs of the terminal in the first frequency domain range do not send SL reference signals; wherein the at least some RBs include at least one of the following:

[0086] RBs in the guard bandwidth whose frequency domain positions are lower than the fourth RB set;

[0087] RBs in the guard bandwidth whose frequency domain positions are higher than the fifth RB set;

[0088] All RBs in the protection bandwidth.

[0089] In the embodiment of the present application, the fourth RB set is: an RB set with the lowest frequency domain position within the first frequency domain range, and the fifth RB set is: an RB set with the highest frequency domain position within the first frequency domain range.

[0090] It can be seen that since the terminal may not send the SL reference signal in the RBs in the protection bandwidth whose frequency domain position is lower than the fourth RB set, the RBs in the protection bandwidth whose frequency domain position is higher than the fifth RB set, and the RBs in all the protection bandwidths, the interference caused by transmissions of different terminals in unlicensed frequency bands can be reduced.

[0091] In some embodiments of the present application, the physical sidelink channel and the SL reference signal are separated by at least one first symbol (or separated by at least a period of time, the unit of the time interval is a specific time unit, and the time unit includes but is not limited to at least one of Ts, Tc, symbol, time slot, and subframe). The at least one first symbol includes at least one of the following: a guard period (GP) symbol and an automatic gain control (AGC) symbol.

[0092] The GP symbol is used to ensure that the terminal has enough time to switch between the Interlace-based structure and the continuous-RB-based structure.

[0093] Among them, since the structure in the embodiment of the present application allows different terminals to use Comb-level FDM, the AGC symbol is used for the terminal to perform automatic gain control when receiving SL reference signals from different terminals.

[0094] In one implementation, there is one symbol between the physical sidelink channel and the SL reference signal (e.g., after the physical sidelink channel and before the SL reference signal), and the symbol is an AGC symbol. Optionally, the AGC symbol implies the time for switching between the Interlace-based structure and the continuous-RB-based structure.

[0095] In one implementation mode, there is one symbol between the physical sidelink channel and the SL reference signal (eg, after the physical sidelink channel and before the SL reference signal), and the symbol is a GP symbol.

[0096] In one implementation, there are two symbols between the physical sidelink channel and the SL reference signal (e.g., after the physical sidelink channel and before the SL reference signal), one symbol is a GP symbol and the other symbol is an AGC symbol. Optionally, the former symbol is a GP and the latter symbol is an AGC.

[0097] Optionally, the Comb offset corresponding to the AGC symbol is the same as the Comb offset corresponding to a symbol of the SL reference signal, such as the last symbol. Optionally, the content of the AGC symbol RE can be generated by the SL reference signal sequence, where the symbol index corresponding to the SL reference signal sequence is the AGC symbol index.

[0098] Optionally, when the terminal determines the symbol position occupied by the physical sidelink channel (e.g., PSSCH) and / or the transport block size (Transport Block Size, TBS) occupied by the PSSCH and / or the number of coded modulation symbols generated for 2nd-stage SCI transmission in a time slot, the symbol occupied by the SL reference signal, the AGC symbol before and after the SL PRS (if any), and the GP symbol before and after the SL reference signal (if any).

[0099] It can be understood that when the terminal sends the physical sidelink channel and the SL reference signal, the time domain resources selected from the above resource pool are spaced apart by at least one first symbol.

[0100] Optionally, the number of the at least one first symbol satisfies any one of the following: is pre-configured by the network side device, is pre-defined, or is agreed upon by the protocol.

[0101] It can be seen that since the physical sidelink channel and the SL reference signal are separated by at least one first symbol (or at least a period of time), the interference between the physical sidelink channel and the SL reference signal when they are sent can be reduced and / or sufficient time can be guaranteed for the terminal to complete the switching between two different types of transmissions, namely, the switching between interlace-based transmission and continuous RB-based transmission.

[0102] Optionally, in the first time unit, the SL reference signal is always sent after the physical sidelink channel, so as to avoid multiple switchings between interlace-based transmission and continuous RB-based transmission in the first time unit.

[0103] The embodiment of the present application provides a SL reference signal transmission method, in which a terminal can obtain the configuration information of a resource pool, and send a physical sidelink channel in a frequency domain interlace manner at a first time unit indicated by the configuration information, and send a SL reference signal in a continuous RB manner; wherein the physical sidelink signal and the SL reference signal share the resource pool. Since the terminal can use the resources in the resource pool to send the physical sidelink channel in a frequency domain interlace manner in the same time unit indicated by the configuration information of the resource pool, and send the SL reference signal in a continuous RB manner, instead of using the resources in the resource pool to send the SL reference signal in a frequency domain interlace manner, the continuity of the SL reference signal in the frequency domain transmission can be ensured, and the performance of other terminals in processing the SL reference signal can be guaranteed, so that other terminals can accurately perform SL positioning according to the SL reference signal, thus improving the positioning accuracy of SL positioning.

[0104] In addition, since the terminal uses continuous RBs to send the SL reference signal, and the SL reference signal has a Comb structure, comb-level FDM of different terminals can be enabled to ensure resource utilization.

[0105] In some embodiments of the present application, Figure 1 ,like Figure 4 As shown, after the above step 101 and before the above step 102, the SL reference signal transmission method provided in the embodiment of the present application may further include the following step 201, and the above step 102 may be specifically implemented through the following step 102a.

[0106] Step 201: The terminal determines a first resource for sending a SL reference signal.

[0107] It can be understood that in this step 201, the first resource is a time-frequency resource used to send the SL reference signal within the first time unit.

[0108] In some embodiments of the present application, the first resource may specifically be: SL-PRS resource.

[0109] In some embodiments of the present application, the number of the above-mentioned first resources may be at least one.

[0110] Optionally, the first resource includes at least one of the following features:

[0111] a resource identifier of the first resource;

[0112] The comb size of the first resource;

[0113] The comb structure offset of the first resource;

[0114] a second time unit starting with the first resource;

[0115] The number of second time units occupied by the first resource;

[0116] First frequency domain range.

[0117] Among them, the resource identifier of the above-mentioned first resource can be: SL-PRS resource ID; the above-mentioned second time unit can be any one of the following: time slot, OFDM symbol, etc.

[0118] Optionally, the above features may also be referred to as "configurations".

[0119] It can be understood that the first resource can be determined by at least one of a resource identifier of the first resource, a comb structure size of the first resource, a comb structure offset of the first resource, a second time unit starting from the first resource, and a number of second time units occupied by the first resource.

[0120] Optionally, the second time unit may be different from the first time unit. For example, when the first time unit is a time slot, the second time unit may be an OFDM symbol.

[0121] In some embodiments of the present application, the first resource has the same time-frequency position in each RB set.

[0122] Optionally, in the resource pool, the symbol position of the first resource in a time unit is fixed. Optionally, the comb size of the first resource in a time unit is fixed. This can avoid conflicts between the first resources selected by different terminals in the same time unit and the resources (and PSSCH) used to send SL reference signals of other terminals.

[0123] The symbol positions and comb structure sizes mentioned above satisfy any of the following conditions: configured by a network side device, pre-configured (eg, configured for each resource pool), agreed upon by a protocol, or pre-configured by a terminal.

[0124] Optionally, at least one of the identifier of the first resource, the starting symbol position, the number of symbols, the comb size, and the comb offset can be pre-configured per resource pool. Further, a mapping relationship between the identifier of the first resource and at least one of the starting symbol position, the number of symbols, the comb size, and the comb offset can be pre-configured.

[0125] In one implementation, a combination of {starting symbol position, number of symbols, comb size} is preconfigured in a slot, and different terminals select corresponding first resources in the slot according to the restrictions of the combination.

[0126] In some embodiments of the present application, the terminal may first determine a resource identifier of a first resource used to send a SL reference signal, and then determine the resource indicated by the resource identifier as the first resource.

[0127] Optionally, the first resource is determined by an index of a second frequency domain unit occupied by a physical sidelink channel and a first mapping relationship; the first mapping relationship includes any one of the following:

[0128] A mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource;

[0129] A mapping relationship between the first combination and the resource identifier of the first resource.

[0130] In some embodiments of the present application, the above-mentioned first mapping relationship satisfies any one of the following: being pre-configured by the network side device, being pre-defined, and being agreed upon by the protocol.

[0131] In some embodiments of the present application, the second frequency domain unit may include at least one of the following: a subchannel and an interlace.

[0132] Optionally, since the resource identifier of the first resource corresponds to a first resource of a specific characteristic or configuration, the mapping relationship between the resource identifier of the first resource can also be understood as a mapping relationship between the characteristic or configuration corresponding to the first resource. For example, in a more direct way, the mapping relationship between the index of the second frequency domain unit or the first combination and the resource identifier of the first resource can be replaced by the mapping relationship between the index of the second frequency domain unit or the first combination and the specific resource characteristic or configuration.

[0133] The second frequency domain unit may be the same as or different from the first frequency domain unit. For example, when the first frequency domain unit is a subchannel, the second frequency domain unit may also be a subchannel, that is, the second frequency domain unit is the same as the first frequency domain unit; or, when the first frequency domain unit is a subchannel, the second frequency domain unit may be interleaved, that is, the second frequency domain unit is different from the first frequency domain unit.

[0134] In some embodiments of the present application, when the first mapping relationship is a mapping relationship between an index of a second frequency domain unit and a resource identifier of a first resource, the first mapping relationship may be a mapping relationship between an index of a second frequency domain unit and a resource identifier of a first resource, or the first mapping relationship may be a mapping relationship between an index of x second frequency domain units and a resource identifier of a first resource, where x is a positive integer greater than 1. Optionally, the resource identifier of the first resource is an SL positioning reference signal resource identifier.

[0135] For example, Figure 5As shown, it is assumed that the terminal sends three PSSCHs to terminal 1, terminal 2 and terminal 3 respectively in a time unit (for example, a slot), and the three PSSCHs occupy subchannel 1, subchannel 2 and subchannel 3 in the time unit, wherein the index of subchannel 1 is subchannel#1, the index of subchannel 2 is subchannel#2, and the index of subchannel 3 is subchannel#3. In this way, after performing FDM at the subchannel level, there is a mapping relationship between the index of each subchannel and the resource identifier of a first resource, for example, there is a mapping relationship 1 between subchannel#1 and SL PRS resource#1, there is a mapping relationship 2 between subchannel#2 and SL PRSresource#2, and there is a mapping relationship 3 between subchannel#3 and SL PRS resource#3. Therefore, the terminal can use the subchannel 1, subchannel 2 and subchannel 3 occupied by the physical sidelink channel in the slot, and the mapping relationships 1, 2 and 3 to determine the resource identifier of the first resource used to send the SL reference signal in the slot, that is, SL PRS resource#1, SL PRS resource#2, and SL PRSresource#3. PRS resource#2 and SL PRSresource#3 are used to determine SL PRS resource 1, SL PRS resource 2 and SLPRS resource 3 for sending SL PRS in this time unit based on SL PRS resource#1, SL PRS resource#2 and SL PRS resource#3. The subchannel 1 is associated with SL PRS resource 1, the subchannel 2 is associated with SL PRSresource 2, and the subchannel 3 is associated with SL PRS resource 3.

[0136] It should be noted that Figure 5 The same shaded area is used to indicate the associated subchannel and SLPRS resource.

[0137] Optionally, when the first mapping relationship is a mapping relationship between an index of a second frequency domain unit and a resource identifier of a first resource, the index of the second frequency domain unit and the resource identifier of the first resource satisfy the following formula:

[0138] SL PRS resource ID=mod(Subchannel index, number of SL PRS resource);

[0139] Among them, SL PRS resource ID is the resource identifier of the above-mentioned first resource, Subchannel index is the index of the above-mentioned second frequency domain unit (the second frequency domain unit is a subchannel), and number of SL PRSresource is the number of time units occupied by SL-PRS resources.

[0140] In some embodiments of the present application, when the number of second frequency domain units occupied by the physical sidelink channel is one, the above-mentioned first mapping relationship includes a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource.

[0141] Optionally, the mapping relationship may be (pre)configured or agreed upon by protocol.

[0142] Optionally, generally, the number of first resources (or resource identifiers of first resources) is not less than the number of second frequency domain units. If the number of second frequency domain units (or indexes of second frequency domain units) is greater than the number of first resources (or resource identifiers of first resources), the excess second frequency domain units cannot be occupied or allocated resources.

[0143] In the embodiment of the present application, the above-mentioned first combination is: a combination consisting of a second frequency domain unit starting from a second frequency domain unit occupied by a physical sidelink channel and the number of second frequency domain units occupied by the physical sidelink channel.

[0144] In some embodiments of the present application, the index of the first combination can be determined according to FRIV. It should be noted that for the description of FRIV, reference can be made to the specific description in the related art, which will not be repeated in the embodiments of the present application.

[0145] In some embodiments of the present application, the index of the above-mentioned first combination can be sorted according to the starting second frequency domain unit in the second frequency domain unit occupied by the physical sidelink channel and the number of second frequency domain units occupied by the physical sidelink channel.

[0146] In some embodiments of the present application, when the first mapping relationship includes a mapping relationship between a first combination and a resource identifier of a first resource, the first mapping relationship may be a mapping relationship between a first combination and a resource identifier of a first resource, or the first mapping relationship may be a mapping relationship between y first combinations and a resource identifier of a first resource, where y is a positive integer greater than 1.

[0147] Optionally, when the first mapping relationship is a mapping relationship between a first combination and a resource identifier of a first resource, the first combination and the resource identifier of the first resource satisfy the following formula:

[0148] SL PRS resource ID=mod (combination index, number of SL PRS resource);

[0149] Among them, SL PRS resource ID is the resource identifier of the above-mentioned first resource, combination index is the index of the above-mentioned first combination, and number of SL PRS resource is the number of time units occupied by the SL-PRS resource. Optionally, the mapping relationship can be (pre) configured or agreed upon by protocol. Optionally, the number of resource identifiers of general first resources is not less than the number of combination indexes. If the number of first combinations (or indexes of first combinations) is greater than the number of first resources (or resource identifiers of first resources), the exceeding first combinations cannot be occupied or allocated resources.

[0150] Optionally, in a resource pool, different terminals occupy the same number of second frequency domain units. The number of second frequency domain units occupied by each terminal can be per resource pool (pre) configuration or protocol agreement. In this case, the mapping relationship between the first combination and the resource identifier of the first resource can be equivalent to the mapping relationship between the starting (or the smallest index) second frequency domain unit (or the starting second frequency domain unit Index) occupied by the physical sidelink channel and the resource identifier of the first resource. Optionally, the mapping relationship can be (pre) configured or agreed upon by protocol, or, in this case, the first combination index can be equivalent to the physical sidelink channel resource identifier. As agreed upon by protocol, for example:

[0151] SL PRS resource ID = mod (starting second frequency domain unit index / number of second frequency domain units, number of SL PRSresource);

[0152] Among them, SLPRSresourceID is the resource identifier of the above-mentioned first resource, the starting second frequency domain unit index is the index of the starting second frequency domain unit occupied by a terminal, the number of second frequency domain units is the number of second frequency domain units occupied by a terminal, and number of SL PRS resource is the number of time units occupied by SL-PRS resources.

[0153] In some embodiments of the present application, when the number of second frequency domain units occupied by the physical sidelink channel is at least two, the above-mentioned first resource is determined by one second frequency domain unit of the at least two second frequency domain units and the first mapping relationship.

[0154] The second frequency domain unit is any one of the following:

[0155] A second frequency domain unit with the highest frequency domain position among the at least two second frequency domain units;

[0156] The second frequency domain unit with the lowest frequency domain position among the at least two second frequency domain units;

[0157] A second frequency domain unit with the largest index among the at least two second frequency domain units;

[0158] A second frequency domain unit with the smallest index among the at least two second frequency domain units;

[0159] Any second frequency domain unit of the at least two second frequency domain units.

[0160] Optionally, the terminal may determine the resource identifier of the first resource according to the index of the second frequency domain unit and the first mapping relationship to determine the first resource.

[0161] It can be seen that, since the terminal can determine the first resource based on one of the at least two second frequency domain units when the number of second frequency domain units occupied by the physical sidelink channel is at least two, it can be avoided that the terminal cannot determine the first resource when the number of second frequency domain units occupied by the physical sidelink channel is at least two.

[0162] Optionally, when the number of second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by at least one of the following:

[0163] A resource randomly selected by the terminal within the first resource range;

[0164] The resources indicated by the network side device within the first resource range;

[0165] resources indicated by other terminals within the first resource range;

[0166] The resource with the smallest or largest index in the first resource range.

[0167] In the embodiment of the present application, the first resource range includes at least two candidate resources, and each candidate resource has a mapping relationship with a second frequency domain unit.

[0168] In some embodiments of the present application, the mapping relationship between each candidate resource and a second frequency domain unit satisfies any one of the following: being preconfigured by a network-side device, being predefined, or being agreed upon by a protocol.

[0169] It can be seen that, since the number of second frequency domain units occupied by the physical sidelink channel is at least two, the terminal can determine the first resource based on at least one of the resources randomly selected by the terminal within the first resource range, the resources indicated by the network side device within the first resource range, the resources indicated by other terminals within the first resource range, and the resource with the smallest or largest index within the first resource range. Therefore, it can avoid the situation where the terminal cannot determine the first resource when the number of second frequency domain units occupied by the physical sidelink channel is at least two.

[0170] Optionally, the terminal indicates the first resource determined from the first resource range to the receiving end through the SCI.

[0171] Furthermore, the terminal indicates the first resource reserved within the Nth resource range corresponding to the first time unit reserved after the first time unit through SCI, where N is a positive integer. Among them, the Nth resource range corresponds to the candidate resources included in the reserved first time unit, and the candidate resources have a mapping relationship with the second frequency domain unit included in the physical sidelink channel on the reserved first time unit. Optionally, if the candidate resource determined according to the mapping relationship is one (that is, one candidate resource is uniquely determined completely through mapping, and the candidate resource is used as the first resource on the reserved time unit), it may not be indicated through SCI; if the number of candidate resources is multiple, it is indicated through the above-mentioned SCI.

[0172] Step 102a: The terminal sends a physical sidelink channel in a frequency domain interlace manner at a first time unit indicated by the configuration information, and sends an SL reference signal in a continuous RB manner according to the first resource.

[0173] Therefore, it can be known that the terminal can determine the first resource for sending the SL reference signal within the first time unit, so that the terminal can accurately use the first resource to send the SL reference signal in the form of continuous RBs while sending the physical sidelink channel in the frequency domain Interlace manner in the first time unit.

[0174] In some embodiments of the present application, if the number of second frequency domain units occupied by the physical sidelink channel is at least two, the terminal can share the resource identifier of the first resource selected and / or reserved by itself for sending the SL reference signal and / or the resource identifier of other resources for sending the SL reference signal other than the resources selected and reserved by itself with other terminals.

[0175] Optionally, the terminal can share with other terminals through at least one of SCI, Sidelink Positioning Protocol (SLPP) layer, Sidelink Media Access Control Control Element (SL MAC CE), and Sidelink Radio Resource Control (SL RRC).

[0176] Optionally, the other terminal may be a terminal belonging to the same group as the terminal.

[0177] Of course, in order to enable other terminals receiving the SL reference signal to determine the first resource used by the terminal to send the SL reference signal, the terminal may also indicate the first resource to other terminals.

[0178] In some embodiments of the present application, the terminal may send the first mapping relationship to other terminals to indicate the first resource to other terminals through the first mapping relationship.

[0179] In some embodiments of the present application, the SCI carried by the physical sidelink channel is used to indicate the first resource. It can be understood that the terminal can indicate the first resource to other terminals through the SCI.

[0180] The terminal may carry the resource identifier of the first resource and / or the characteristics of the first resource in the SCI to indicate the first resource to other terminals.

[0181] Optionally, the above SCI includes at least one of the following: first-level SCI and second-level SCI.

[0182] Among them, when the physical sidelink channel includes PSCCH, the SCI includes a first-level SCI, and it can be understood that the PSCCH can carry the first-level SCI; when the physical sidelink channel includes PSSCH, the SCI includes a second-level SCI, and it can be understood that the PSSCH can carry the second-level SCI.

[0183] Optionally, when the quantity of the first resource is insufficient to indicate the first resource to other terminals through the first mapping relationship, the terminal may indicate the above-mentioned first resource to other terminals through SCI; optionally, the way in which the terminal determines the first resource by mapping or direct indication is indicated by the network side device.

[0184] In some embodiments of the present application, the SCI carried by the above-mentioned physical sidelink channel is used to indicate the first resource of the first time unit reserved after the first time unit.

[0185] It can be understood that, in the embodiment, the SCI indicates the resources (ie, the first resources) used to send the SL reference signal within the reserved first time unit.

[0186] Optionally, the SCI may also be used to indicate resources for sending a physical sidelink channel in a first time unit reserved after the first time unit.

[0187] It can be seen that since the SCI carried by the physical sidelink channel can indicate the first resource for sending the SL reference signal in the first time unit reserved after the first time unit, other terminals can accurately receive the information sent by the terminal according to the indicated resources.

[0188] The SL reference signal transmission method provided in the embodiment of the present application may be executed by a SL reference signal transmission device. In the embodiment of the present application, the SL reference signal transmission method performed by the SL reference signal transmission device is taken as an example to illustrate the SL reference signal transmission device provided in the embodiment of the present application.

[0189] Figure 6 A possible structural diagram of the SL reference signal transmission device involved in the embodiment of the present application is shown. Figure 6 As shown, the SL reference signal transmission device 50 may include: an acquisition module 51 and a sending module 52.

[0190] The acquisition module 51 is used to acquire the configuration information of the resource pool. The sending module 52 is used to send the physical sidelink channel in a frequency domain interlace manner and send the SL reference signal in a continuous RB manner at the first time unit indicated by the configuration information acquired by the acquisition module 51. The physical sidelink channel and the SL reference signal share the resource pool.

[0191] An embodiment of the present application provides a SL reference signal transmission device. Since the SL reference signal transmission device can use the resources in the resource pool to send the SL reference signal in a continuous RB manner while using the resources in the resource pool to send the physical sidelink channel in a frequency domain interlace manner in the same time unit indicated by the configuration information of the resource pool, instead of using the resources in the resource pool to send the SL reference signal in a frequency domain interlace manner, the continuity of the SL reference signal transmission in the frequency domain can be ensured, and the performance of other SL reference signal transmission devices in processing the SL reference signal can be guaranteed, so that other SL reference signal transmission devices can accurately perform SL positioning according to the SL reference signal, thereby improving the positioning accuracy of SL positioning.

[0192] In a possible implementation, the physical sidelink channel occupies at least one first RB set, and the first frequency domain range occupied by the SL reference signal is determined by at least one of the following: the frequency domain range from the second RB set to the third RB set; the frequency domain range from the first frequency domain unit with the lowest frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set; the frequency domain range from the first frequency domain unit with the smallest index in the second RB set to the first frequency domain unit with the largest index in the third RB set; resource pool bandwidth. The second RB set is: the RB set with the lowest frequency domain position in at least one first RB set, and the third RB set is: the RB set with the highest frequency domain position in at least one first RB set.

[0193] In a possible implementation manner, if the first frequency domain range includes continuous RB sets, the SL reference signal transmission device 50 sends the SL reference signal in a protection bandwidth between continuous RB sets.

[0194] In a possible implementation, the SL reference signal transmission device 50 does not send SL reference signals in at least some RBs in the first frequency domain range. The at least some RBs include at least one of the following: RBs in the protection bandwidth whose frequency domain position is lower than the fourth RB set; RBs in the protection bandwidth whose frequency domain position is higher than the fifth RB set; RBs in all protection bandwidths. The fourth RB set is: the RB set with the lowest frequency domain position in the first frequency domain range, and the fifth RB set is: the RB set with the highest frequency domain position in the first frequency domain range.

[0195] In a possible implementation, the SL reference signal transmission device 50 provided in the embodiment of the present application may also include: a determination module. The determination module is used to determine the first resource for sending the SL reference signal before the sending module 52 sends the physical sidelink channel in the frequency domain interlace manner on the first time unit indicated by the configuration information and sends the SL reference signal in the form of continuous RBs. The above-mentioned sending module 52 is specifically used to send the physical sidelink channel in the frequency domain interlace manner on the first time unit indicated by the configuration information, and send the SL reference signal in the form of continuous RBs according to the first resource.

[0196] In a possible implementation, the first resource includes at least one of the following features: a resource identifier of the first resource; a comb structure size of the first resource; a comb structure offset of the first resource; a second time unit starting from the first resource; the number of second time units occupied by the first resource; and a first frequency domain range.

[0197] In a possible implementation, the first resource is determined by the index of the second frequency domain unit occupied by the physical sidelink channel and a first mapping relationship; the first mapping relationship includes any one of the following: a mapping relationship between the index of the second frequency domain unit and the resource identifier of the first resource; a mapping relationship between the first combination and the resource identifier of the first resource. The first combination is a combination of the second frequency domain unit starting from the second frequency domain unit occupied by the physical sidelink channel and the number of second frequency domain units occupied by the physical sidelink channel.

[0198] In a possible implementation, when the number of second frequency domain units occupied by the physical sidelink channel is one, the first mapping relationship includes a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource.

[0199] In one possible implementation, when the number of second frequency domain units occupied by the physical sidelink channel is at least two, the above-mentioned first resource is determined by one second frequency domain unit among at least two second frequency domain units and a first mapping relationship; wherein the above-mentioned one second frequency domain unit is any one of the following: the second frequency domain unit with the highest frequency domain position among at least two second frequency domain units; the second frequency domain unit with the lowest frequency domain position among at least two second frequency domain units; the second frequency domain unit with the largest index among at least two second frequency domain units; the second frequency domain unit with the smallest index among at least two second frequency domain units; or any second frequency domain unit among at least two second frequency domain units.

[0200] In a possible implementation, when the number of the second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by at least one of the following: a resource randomly selected by the SL reference signal transmission device 50 within the first resource range; a resource indicated by the network side device within the first resource range; a resource indicated by other SL reference signal transmission devices within the first resource range; a resource with the smallest or largest index within the first resource range. The first resource range includes at least two candidate resources, and each candidate resource has a mapping relationship with a second frequency domain unit.

[0201] In a possible implementation manner, the SCI carried by the physical sidelink channel is used to indicate the first resource.

[0202] In a possible implementation manner, the SCI carried by the physical sidelink channel is used to indicate a first resource of a first time unit reserved after the first time unit.

[0203] In a possible implementation, the physical sidelink channel and the SL reference signal are separated by at least one first symbol, and the at least one first symbol includes at least one of the following: a protection interval symbol and an automatic gain control symbol.

[0204] The SL reference signal transmission device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be a device other than a terminal. Exemplarily, the terminal may include but is not limited to the types of terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0205] The SL reference signal transmission device provided in the embodiment of the present application can achieve Figures 2 to 5 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0206] In some embodiments of the present application, Figure 7 As shown, an embodiment of the present application also provides a communication device 60, including a processor 61 and a memory 62, and the memory 62 stores programs or instructions that can be executed on the processor 61. For example, when the communication device 60 is a terminal, the program or instruction is executed by the processor 61 to implement the various steps of the above-mentioned SL reference signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0207] The embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Figures 2 to 5 The steps in the method embodiment shown. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 8 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0208] The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of a processor 710.

[0209] Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 8The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0210] It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0211] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0212] The memory 709 can be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 709 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0213] The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 710.

[0214] The radio frequency unit 701 is used to obtain configuration information of the resource pool; and to send a physical sidelink channel in a frequency domain interlace manner at a first time unit indicated by the configuration information, and to send an SL reference signal in a continuous RB manner.

[0215] The physical sidelink channel and the SL reference signal share the resource pool.

[0216] An embodiment of the present application provides a terminal. Since the terminal can use the resources in the resource pool to send a physical sidelink channel in a frequency domain interlace manner while using the resources in the resource pool to send a SL reference signal in a continuous RB manner in the same time unit indicated by the configuration information of the resource pool, instead of using the resources in the resource pool to send the SL reference signal in a frequency domain interlace manner, the continuity of the SL reference signal in frequency domain transmission can be ensured, and the performance of other terminals in processing the SL reference signal can be guaranteed, so that other terminals can accurately perform SL positioning according to the SL reference signal, thereby improving the positioning accuracy of SL positioning.

[0217] In some embodiments of the present application, the processor 710 is further used to determine a first resource for sending the SL reference signal.

[0218] The radio frequency unit 701 is specifically configured to send a physical sidelink channel in a frequency domain interlace manner in a first time unit indicated by the configuration information, and send an SL reference signal in a continuous RB manner according to the first resource.

[0219] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0220] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned SL reference signal transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0221] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0222] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned SL reference signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0223] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0224] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned SL reference signal transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0225] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0226] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0227] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A method for transmitting a sidelink SL reference signal, characterized in that: include: The terminal obtains configuration information of the resource pool; The terminal sends a physical sidelink channel in a frequency domain interleaving manner at a first time unit indicated by the configuration information, and sends an SL reference signal in a continuous resource block RB manner; The physical sidelink channel and the SL reference signal share the resource pool.

2. The method according to claim 1, characterized in that The physical sidelink channel occupies at least one first resource block set RB set, and the first frequency domain range occupied by the SL reference signal is determined by at least one of the following: A frequency domain range from the second RB set to the third RB set; A frequency domain range from a first frequency domain unit with the lowest frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set; a frequency domain range from the first frequency domain unit with the smallest index in the second RB set to the first frequency domain unit with the largest index in the third RB set; The resource pool bandwidth; The second RB set is: an RB set with the lowest frequency domain position in at least one of the first RB sets, and the third RB set is: an RB set with the highest frequency domain position in at least one of the first RB sets.

3. The method according to claim 2, characterized in that If the first frequency domain range includes continuous RB sets, the terminal sends the SL reference signal in a protection bandwidth between continuous RB sets.

4. The method according to claim 2, characterized in that: The terminal does not send the SL reference signal at least part of RBs in the first frequency domain range; The at least part of the RBs includes at least one of the following: RBs in the guard bandwidth whose frequency domain positions are lower than the fourth RB set; RBs in the guard bandwidth whose frequency domain positions are higher than the fifth RB set; RBs in the total protection bandwidth; The fourth RB set is: an RB set with the lowest frequency domain position within the first frequency domain range, and the fifth RB set is: an RB set with the highest frequency domain position within the first frequency domain range.

5. The method according to claim 1, characterized in that Before the terminal sends a physical sidelink channel in a frequency domain interlace manner and sends an SL reference signal in a continuous RB manner at a first time unit indicated by the configuration information, the method further includes: The terminal determines a first resource for sending the SL reference signal; The terminal sends a physical sidelink channel in a frequency domain interleaving Interlace manner at a first time unit indicated by the configuration information, and sends an SL reference signal in a continuous resource block RB manner, including: The terminal sends the physical sidelink channel in a frequency domain interlace manner at the first time unit indicated by the configuration information, and sends the SL reference signal in a continuous RB manner according to the first resource.

6. The method according to claim 5, characterized in that The first resource includes at least one of the following characteristics: a resource identifier of the first resource; a comb structure size of the first resource; a comb structure offset of the first resource; a second time unit starting from the first resource; The number of second time units occupied by the first resource; The first frequency domain range.

7. The method according to claim 5, characterized in that The first resource is determined by an index of a second frequency domain unit occupied by the physical sidelink channel and a first mapping relationship; The first mapping relationship includes any one of the following: a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource; A mapping relationship between the first combination and the resource identifier of the first resource; The first combination is a combination of the second frequency domain unit starting from the second frequency domain unit occupied by the physical sidelink channel and the number of the second frequency domain units occupied by the physical sidelink channel.

8. The method according to claim 7, characterized in that In a case where the number of the second frequency domain units occupied by the physical sidelink channel is one, the first mapping relationship includes a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource.

9. The method according to claim 7, characterized in that: When the number of the second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by one of the at least two second frequency domain units and the first mapping relationship; Wherein, one of the second frequency domain units is any one of the following: The second frequency domain unit having the highest frequency domain position among at least two of the second frequency domain units; the second frequency domain unit with the lowest frequency domain position among at least two of the second frequency domain units; The second frequency domain unit with the largest index among at least two of the second frequency domain units; the second frequency domain unit having the smallest index among at least two of the second frequency domain units; Any one of at least two of the second frequency domain units is the second frequency domain unit.

10. The method according to claim 5, characterized in that When the number of the second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by at least one of the following: A resource randomly selected by the terminal within a first resource range; resources indicated by the network-side device within the first resource range; resources indicated by other terminals within the first resource range; The resource with the smallest or largest index within the first resource range; The first resource range includes at least two candidate resources, and each of the candidate resources has a mapping relationship with one of the second frequency domain units.

11. The method according to any one of claims 5 to 10, characterized in that The side link control information SCI carried by the physical side link channel is used to indicate the first resource.

12. The method according to any one of claims 5 to 10, characterized in that The SCI carried by the physical sidelink channel is used to indicate the first resource of the first time unit reserved after the first time unit.

13. The method according to claim 1, characterized in that There is at least one first symbol between the physical sidelink channel and the SL reference signal, and at least one of the first symbols includes at least one of the following: a protection interval symbol and an automatic gain control symbol.

14. An SL reference signal transmission device, characterized in that: The SL reference signal transmission device includes: an acquisition module and a sending module; The acquisition module is used to acquire configuration information of the resource pool; The sending module is configured to send a physical sidelink channel in a frequency domain interlace manner and send an SL reference signal in a continuous RB manner at a first time unit indicated by the configuration information obtained by the obtaining module; The physical sidelink channel and the SL reference signal share the resource pool.

15. The SL reference signal transmission device according to claim 14, characterized in that: The physical sidelink channel occupies at least one first RB set, and the first frequency domain range occupied by the SL reference signal is determined by at least one of the following: A frequency domain range from the second RB set to the third RB set; A frequency domain range from a first frequency domain unit with the lowest frequency domain position in the second RB set to the first frequency domain unit with the highest frequency domain position in the third RB set; a frequency domain range from the first frequency domain unit with the smallest index in the second RB set to the first frequency domain unit with the largest index in the third RB set; The resource pool bandwidth; The second RB set is: an RB set with the lowest frequency domain position in at least one of the first RB sets, and the third RB set is: an RB set with the highest frequency domain position in at least one of the first RB sets.

16. The SL reference signal transmission device according to claim 15, characterized in that: If the first frequency domain range includes continuous RB sets, the SL reference signal transmission device sends the SL reference signal in a protection bandwidth between continuous RB sets.

17. The SL reference signal transmission device according to claim 15, characterized in that: The SL reference signal transmission device does not send the SL reference signal in at least part of the RBs in the first frequency domain range; The at least part of the RBs includes at least one of the following: RBs in the guard bandwidth whose frequency domain positions are lower than the fourth RB set; RBs in the guard bandwidth whose frequency domain positions are higher than the fifth RB set; RBs in the total protection bandwidth; The fourth RB set is: an RB set with the lowest frequency domain position within the first frequency domain range, and the fifth RB set is: an RB set with the highest frequency domain position within the first frequency domain range.

18. The SL reference signal transmission device according to claim 14, characterized in that: The SL reference signal transmission device further includes: a determination module; The determining module is configured to determine a first resource for sending the SL reference signal before the sending module sends the physical sidelink channel in a frequency domain interlace manner and sends the SL reference signal in a continuous RB manner on the first time unit indicated by the configuration information; The sending module is specifically used to send the physical sidelink channel in a frequency domain interlace manner on the first time unit indicated by the configuration information, and send the SL reference signal in a continuous RB manner according to the first resource.

19. The SL reference signal transmission device according to claim 18, characterized in that: The first resource includes at least one of the following characteristics: a resource identifier of the first resource; a comb structure size of the first resource; a comb structure offset of the first resource; a second time unit starting from the first resource; The number of second time units occupied by the first resource; The first frequency domain range.

20. The SL reference signal transmission device according to claim 18, characterized in that: The first resource is determined by an index of a second frequency domain unit occupied by the physical sidelink channel and a first mapping relationship; The first mapping relationship includes any one of the following: a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource; A mapping relationship between the first combination and the resource identifier of the first resource; The first combination is a combination of the second frequency domain unit starting from the second frequency domain unit occupied by the physical sidelink channel and the number of the second frequency domain units occupied by the physical sidelink channel.

21. The SL reference signal transmission device according to claim 20, characterized in that: In a case where the number of the second frequency domain units occupied by the physical sidelink channel is one, the first mapping relationship includes a mapping relationship between an index of the second frequency domain unit and a resource identifier of the first resource.

22. The SL reference signal transmission device according to claim 20, characterized in that: When the number of the second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by one second frequency domain unit of the at least two second frequency domain units and the first mapping relationship; Wherein, one of the second frequency domain units is any one of the following: The second frequency domain unit having the highest frequency domain position among at least two of the second frequency domain units; the second frequency domain unit with the lowest frequency domain position among at least two of the second frequency domain units; The second frequency domain unit with the largest index among at least two of the second frequency domain units; the second frequency domain unit having the smallest index among at least two of the second frequency domain units; Any one of at least two of the second frequency domain units is the second frequency domain unit.

23. The SL reference signal transmission device according to claim 18, characterized in that: When the number of the second frequency domain units occupied by the physical sidelink channel is at least two, the first resource is determined by at least one of the following: The SL reference signal transmission device randomly selects a resource within the first resource range; resources indicated by the network-side device within the first resource range; Resources indicated by other SL reference signal transmission devices within the first resource range; The resource with the smallest or largest index within the first resource range; The first resource range includes at least two candidate resources, and each of the candidate resources has a mapping relationship with one of the second frequency domain units.

24. The SL reference signal transmission device according to any one of claims 18 to 23, characterized in that: The SCI carried by the physical sidelink channel is used to indicate the first resource.

25. The SL reference signal transmission device according to any one of claims 18 to 23, characterized in that: The SCI carried by the physical sidelink channel is used to indicate the first resource of the first time unit reserved after the first time unit.

26. The SL reference signal transmission device according to claim 14, characterized in that: There is at least one first symbol between the physical sidelink channel and the SL reference signal, and at least one of the first symbols includes at least one of the following: a protection interval symbol and an automatic gain control symbol.

27. A terminal, characterized in that: It includes a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the SL reference signal transmission method as described in any one of claims 1 to 13 are implemented.

28. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the SL reference signal transmission method as described in any one of claims 1 to 13 is implemented.

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