Channel sending or receiving method and apparatus, and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a channel sending or receiving method and apparatus, and a communication device. The channel sending or receiving method in the embodiments of the present application comprises: sending or receiving a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), or sending or receiving the PSCCH, the PSSCH and a sidelink-positioning reference signal (SL-PRS), wherein the PSCCH is used for bearing first-stage sidelink control information, the first-stage sidelink control information is used for scheduling at least one of the PSSCH, second-stage sidelink control information and the SL-PRS, the PSSCH carries data and the second-stage sidelink control information, and the second-stage sidelink control information is used for decoding the PSSCH and / or scheduling the SL-PRS.

Description

Channel sending or receiving method, device and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202310836864.6 filed in China on July 7, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a channel sending or receiving method, device and communication equipment. Background Art

[0004] With the rapid development of communication systems and terminal capabilities, a large number of location-based service applications have emerged. In order to meet the diverse needs of terminals for positioning services in terms of latency, accuracy, and security, New Radio Interface Sidelink Positioning (NR-sidelink positioning) came into being.

[0005] In NR-sidelink positioning, considering the relative positioning between terminals, that is, the need for direct link positioning, it is necessary to introduce a direct link positioning reference signal (SL-PRS) transmitted between terminals. This allows the terminals to complete the relative positioning process between terminals directly in the direct link without relying on the base station.

[0006] Among them, the relevant SL-PRS transmission and reception can be introduced into the shared resource pool, but the introduction of new signal transmission in the shared resource pool requires modification of the corresponding channel structure design. However, the relevant technology does not provide a channel structure that can be applied after introducing SL-PRS into the shared resource pool.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a channel sending or receiving method, apparatus, and communication device, and provide a channel structure that can be applied after introducing SL-PRS into a shared resource pool.

[0009] In a first aspect, a channel sending or receiving method is provided, the method comprising:

[0010] Sending or receiving a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or sending or receiving the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS;

[0011] The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS;

[0012] The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

[0013] In a second aspect, a channel sending or receiving device is provided, the device comprising:

[0014] a transmitting or receiving module, configured to transmit or receive a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or transmit or receive the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS;

[0015] The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS;

[0016] The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

[0017] In a third aspect, a communication device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0018] In a fourth aspect, a communication device is provided, including a processor and a communication interface, wherein the communication interface is configured to send or receive a physical direct link control channel (PSCCH) and a physical direct link shared channel (PSSCH), or to send or receive the PSCCH, the PSSCH, and a direct link positioning reference signal (SL-PRS);

[0019] The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS;

[0020] The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

[0021] 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.

[0022] In a sixth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the method described in the first aspect.

[0023] 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.

[0024] In an embodiment of the present application, PSCCH and PSSCH are sent or received, or PSCCH, PSSCH and SL-PRS are sent or received, wherein the PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of PSSCH, second-stage direct link control information, and SL-PRS; the PSSCH carries data and second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS. It can be seen that the embodiment of the present application provides a new channel structure that can be applied after the SL-PRS is introduced into the shared resource pool, laying the foundation for achieving direct link positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a channel structure in the related art;

[0026] FIG2 is a flow chart of a channel sending or receiving method in an embodiment of the present application;

[0027] FIG3 is a schematic diagram of a channel structure in an embodiment of the present application;

[0028] FIG4 is a structural block diagram of a channel sending or receiving device in an embodiment of the present application;

[0029] FIG5 is a structural block diagram of a communication device in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0031] 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 object 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 options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. 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 technology described 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 description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0032] First, in order to facilitate understanding of the channel sending or receiving method of the embodiment of the present application, the following content is introduced.

[0033] In the related art, as shown in FIG1 , in the shared resource pool, the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH) adopt the time division multiplexing (TDM) + frequency division multiplexing (FDM) method, and introduce the second stage of the direct link control information (2 nd -stage SCI), which and data are carried by PSSCH; the first stage direct link control information (1 st -stage SCI) is carried by PSCCH and is used to indicate the time-frequency resource position, priority, period and corresponding modulation and coding scheme (MCS) occupied by the current transport block.

[0034] To implement SL-Positioning, sending SL-PRS in the resource pool corresponding to protocol version 16 (R16) or 17 (R17) is a feasible method. This approach can save sidelink resources and improve resource utilization. However, this introduces forward compatibility issues, namely how to minimize the impact of protocol version 18 (R18) SL-Positioning UEs on R16 or R17 UEs, how to prevent the R16 and R17 resource allocation mechanisms from being affected, and how to ensure the normal operation of R18 UEs. These are all issues that need to be addressed.

[0035] In addition, the SL-PRS reference signal is not introduced in the sidelink communication of the related art, and there is no process design for related positioning interaction. If some reference signals in the related art are reused as SL-PRS, the first problem is accuracy and flexibility, and the power spectral density (PSD) is also affected by multiplexing with other signals. In the embodiment of the present application, by introducing a new SL-PRS transmission and mapping mechanism, 1 st -stage SCI original design rules to ensure forward compatibility and guarantee the transmission performance of SL-PRS while minimizing the impact on R16 and 17 UEs.

[0036] The channel sending or receiving method provided in the embodiments of the present application is described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0037] In a first aspect, an embodiment of the present application provides a channel sending or receiving method. As shown in FIG2 , the method may include the following step 201:

[0038] Step 201: Send or receive a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or send or receive the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS.

[0039] The PSCCH is used to carry first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS; the PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

[0040] It can be seen that the embodiments of the present application provide a new channel structure that can be applied after introducing SL-PRS into the shared resource pool, laying the foundation for achieving direct link positioning. For example, the channel structure can be shown in Figure 3.

[0041] That is, an embodiment of the present application provides a new channel structure after introducing SL-PRS into the shared resource pool. Under this channel structure, the transmitting device can send PSCCH and PSSCH, or send PSCCH and PSSCH and SL-PRS; the receiving device can receive PSCCH and PSSCH, or receive PSCCH and PSSCH and SL-PRS.

[0042] It can be seen from this that after introducing SL-PRS into the shared resource pool, SL-PRS can be sent together when PSCCH and PSSCH are sent, so that SL-PRS can be received together when PSCCH and PSSCH are received.

[0043] It should be noted that for the shared resource pool, if the transmission or reception of SL-PRS is involved, additional restrictions can be imposed on the initial and retransmissions to maintain a consistent time slot structure. Either both transmit and receive SL-PRS, or neither transmit and receive SL-PRS. This is primarily to maintain consistency in the Transport Block Size (TBS) calculation results for the initial and retransmissions. That is, if the initial transmission includes the PSCCH and PSSCH along with the SL-PRS, then the retransmission also includes the PSCCH, PSSCH, and SL-PRS. If the initial transmission includes the PSCCH and PSSCH without the SL-PRS, then the retransmission only requires the PSCCH and PSSCH to be sent. This does not affect the merging of the initial and retransmissions of the service data.

[0044] Alternatively, if SL-PRS is also sent when PSCCH and PSSCH are initially transmitted, then if SL-PRS is not carried during retransmission, the overhead information of SL PRS needs to be carried, and the overhead information is consistent with the overhead information during the initial transmission, thereby maintaining consistency with the TBS calculation results of the initial and retransmissions.

[0045] Alternatively, if only PSCCH and PSSCH are sent in the initial transmission, then if SL-PRS is carried during retransmission, the overhead information of SL PRS needs to be carried, and the overhead information is consistent with the overhead information during the initial transmission, thereby maintaining consistency with the initial and retransmission TBS calculation results.

[0046] Optionally, the “sending or receiving the SL-PRS” in the above step 201 includes the following step A1:

[0047] Step A1: According to the time domain configuration information of the SL-PRS, a target time domain resource that can be used to send or receive the SL-PRS is determined in the first resource, wherein the first resource is a time domain resource located after the second resource in the time unit of the shared resource pool, and the second resource is used to send or receive the second stage direct link control information (2 nd -stage SCI) time domain resources;

[0048] The SL-PRS is sent or received on the target time domain resource.

[0049] Among them, 2 nd -stage SCI can be used to schedule SL-PRS, i.e. 2 nd -stage SCI can carry the scheduling information of SL-PRS, so the resource mapping of SL-PRS cannot be the same as 2-stage SCI. nd -stage SCI resource mapping overlaps, so it can be mapped in the shared resource pool 2 nd-stage SCI and then map SL-PRS.

[0050] In addition, the above-mentioned time unit may be a time slot, or may be a time period consisting of m consecutive symbols within a time slot, where m is an integer greater than zero.

[0051] Optionally, the time domain configuration information of the SL-PRS includes a symbol length N of the SL-PRS;

[0052] The above-mentioned step A1 “determining, in the first resource, a target time domain resource that can be used to send or receive the SL-PRS according to the time domain configuration information of the SL-PRS” includes the following step B1:

[0053] Step B1: determining M consecutive symbols in the first resource that do not overlap with the third resource, and obtaining the target time domain resource;

[0054] The third resource is a resource used to send or receive the first object, and the value of M is N or N+k1, where N and k1 are integers greater than zero.

[0055] In the embodiment of the present application, the first object refers to an object that has been sent or received through the resources of the shared resource pool (2 nd -stage SCI). After SL-PRS is introduced into the shared resource pool, the resource mapping of SL-PRS cannot be combined with 2 nd -stage SCI resource mapping overlap, the SL-PRS resource mapping cannot overlap with the resource mapping of other objects (i.e., the first object) that have been transferred through the shared resource pool, thereby avoiding the transmission impact of the SL-PRS. nd -stage SCI and sending and receiving of first object.

[0056] It should be noted that, when M=N+k1, k1 symbols are used to process automatic gain control (AGC) and / or a guard interval (Gap). The value of k1 may be a positive integer greater than or equal to 1.

[0057] Optionally, the first object includes a demodulation reference signal (DMRS) and / or a second object.

[0058] The second object may include at least one of PSCCH, phase tracking reference signal (PT-RS), channel state information reference signal (CSI-RS), and physical sidelink feedback channel (PSFCH).

[0059] Therefore, the first object includes at least one of DMRS, PSCCH, PT-RS, CSI-RS, and PSFCH.

[0060] That is, the symbols that can be used to transmit or receive SL-PRS are symbols that do not overlap with the symbols used to transmit or receive at least one of the following: 2 nd -stage SCI, DMRS, PSCCH, PT-RS, CSI-RS, PSFCH.

[0061] As can be seen from the above, in the embodiment of the present application, the resource mapping of SL-PRS is the same as 2 nd - There is no overlap in the resource mapping of at least one of the following: -stage SCI, DMRS, PSCCH, PT-RS, CSI-RS, and PSFCH, so that the impact of the R18 sidelink positioning UE on the R16 or R17 UE is minimized, that is, the impact on the resource allocation mechanism of R16 and 17 is avoided, and the normal operation of the R18 UE is guaranteed.

[0062] The resource overlap mentioned above includes time domain and / or frequency domain resource overlap.

[0063] The following specifically describes the implementation method of determining M consecutive symbols in the first resource that do not overlap with the third resource in the above step B1 to obtain the target time domain resource, that is, the following method 1 or method 2.

[0064] Mode 1: Optionally, the above step B1 “determining, in the first resource, M consecutive symbols that do not overlap with the third resource to obtain the target time domain resource” includes the following step C1:

[0065] Step C1: determining a target symbol in a target symbol interval on the first resource, and determining the target symbol as the target time domain resource;

[0066] The target symbol interval includes: a first symbol interval, a symbol interval between every two DMRSs with an index difference of k2 on the first resource, and a second symbol interval, wherein the first symbol interval is a symbol interval between a reference symbol in the first resource and a symbol used to send or receive the first DMRS, and the second symbol interval is a symbol interval between a symbol used to send or receive the last DMRS in the first resource and a symbol at the end of the first resource, and k2 is a preset step size;

[0067] The first DMRS is a DMRS on the first resource, located after the reference symbol in the time domain and closest to the reference symbol;

[0068] The target symbol is M consecutive symbols that do not overlap with resources used to send or receive the second object, or the target symbol is M consecutive symbols.

[0069] As previously mentioned, the first resource is the time domain resource that follows the second resource in the time unit of the shared resource pool. The second resource is the time domain resource used to send or receive the second-stage direct link control information. Therefore, the last symbol mentioned above can refer to the last symbol in the first resource or the last symbol in the time unit.

[0070] In addition, the resource mapping of SL-PRS does not overlap with the resource mapping of DMRS. Therefore, it is necessary to map SL-PRS on the above-mentioned first resources other than the resources used to send or receive DMRS; and when mapping SL-PRS, it is also required to be M consecutive symbols. Therefore, it is determined whether the above-mentioned target symbol exists in the above-mentioned target interval.

[0071] In addition, the reference symbol may be a time unit in the shared resource pool that is located after the second resource (ie, after mapping 2 nd -stage SCI), where x may be configured or preconfigured by a high-level parameter, or predefined by a protocol, such as being predefined as the first symbol after the second resource.

[0072] Optionally, the above step C1 “determining a target symbol in a target symbol interval on the first resource, and determining the target symbol as the target time domain resource” includes the following steps D1 to D7:

[0073] Step D1: Determine whether the target symbol exists in the first symbol interval;

[0074] Step D2: If the target symbol exists in the first symbol interval, determine the target symbol in the first symbol interval as the target time domain resource;

[0075] Step D3: If the target symbol does not exist in the first symbol interval, set the value of Num to the index of the first DMRS;

[0076] Step D4: Determine whether the DMRS with index Num is the last DMRS on the first resource;

[0077] Step D5: If the DMRS with an index of Num is not the last DMRS on the first resource, determine whether the target symbol exists in the third symbol interval between the DMRS with an index of Num and the DMRS with an index of Num+k2 on the first resource; if the target symbol exists in the third symbol interval, determine the target symbol in the third symbol interval as the target time domain resource; if the target symbol does not exist in the third symbol interval, set Num to the current value plus k2, and return to the step of determining whether the DMRS with an index of Num is the last DMRS on the first resource (i.e., step D4);

[0078] Step D6: When the DMRS with index Num is the last DMRS on the first resource, determining whether the target symbol exists in the second symbol interval, and if the target symbol exists in the second symbol interval, determining the first symbol in the second symbol interval as the target time domain resource;

[0079] Step D7: If the target symbol does not exist in the second symbol interval, determine that N is incorrectly configured.

[0080] Optionally, the value of k2 is 1.

[0081] For example, when k2=1 and there are two DMRSs on the first resource, when determining the target symbol in the above target symbol interval, it can be first determined whether there is a target symbol between the reference symbol and the first DMRS. If there is a target symbol between the reference symbol and the first DMRS, the resource mapping of the SL-PRS in the current time unit is completed;

[0082] If there is no target symbol between the reference symbol and the first DMRS, set Num=1 to determine whether there is a target symbol between the DMRS with index Num and the DMRS with index Num+1. If there is a target symbol between the DMRS with index Num and the DMRS with index Num+1, the resource mapping of the SL-PRS in the current time unit is completed;

[0083] If there is no target symbol between the DMRS with index Num and the DMRS with index Num+1, determine whether there is a target symbol between the last column of DMRS and the end symbol of the first resource. If there is a target symbol between the last column of DMRS and the end symbol of the first resource, complete the resource mapping of SL-PRS in the current time unit;

[0084] If there is no target symbol between the second DMRS and the last symbol of the first resource, the symbol length N of the SL-PRS is incorrectly configured.

[0085] In particular, the DMRS index is the corresponding index in the DMRS symbol set on the first resource. For example, if there are two DMRSs on the current first resource, the indices of the two DMRS columns are 1, 2 or 0, 1 respectively. If the DMRS index starts at 0, the initial value of Num should be 0 instead of 1.

[0086] In order to facilitate understanding of the above-mentioned method 1, the above-mentioned method 1 is now explained in conjunction with the following embodiment 1:

[0087] Implementation method 1: SL-PRS time domain mapping method 1, including the following steps 1.1 to 1.3:

[0088] Step 1.1: Set up L ref Representation 2 nd -stage SCI index of the reference symbol after mapping is completed (the reference point of the reference symbol index is the start symbol of PSSCH or the start symbol of the time unit), L SL-PRS Indicates the number of SL-PRS symbols determined by higher layer parameters or physical layer or indicated by SCI, L end_of_PSSCH Indicates the end symbol index of PSSCH, where the symbol index starts from 0.

[0089] Wherein, the reference symbol can be 2 nd -stage SCI The xth symbol after the mapping is completed, x can be configured or pre-configured by high-level parameters, or pre-defined by the protocol; indicates L SL-PRS The SCI includes 1 st -stage SCI and 2 nd -stage SCI at least one.

[0090] Step 1.2: Determine the symbol index interval [l ref ,l ref +L SL-PRS -1], whether it overlaps with at least one of the following symbols: DMRS symbol, PT-RS symbol, CSI-RS symbol, PSCCH, PSFCH;

[0091] Step 1.3: If lref +L SL-PRS -1>L end_of_PSSCH , then L SL-PRS Configuration errors;

[0092] Step 1.4: If there is an overlap with the above symbols, let l ref Equal to the index value corresponding to the last symbol among the overlapping symbols, and repeat step 1.2;

[0093] Step 1.5: If the above symbols do not overlap, then in the index interval [l ref ,l ref +L SL-PRS -1] mapping SL-PRS.

[0094] It should be noted that if L SL-PRS When configuring, it is already configured to meet l ref +L SL-PRS -1≤L end_of_PSSCH , then the above step 1.3 can be omitted.

[0095] In addition, it should be noted that the above-mentioned method 1 is a method for mapping the time domain resources of SL-PRS. For the SL-PRS frequency domain resource mapping method, the frequency domain resources used for sending or receiving SL-PRS can be mapped based on the SL-PRS frequency domain configuration information.

[0096] Optionally, the first information indicates at least one of the following:

[0097] Identification information of the SL-PRS resource (i.e., SL-PRS Resource ID);

[0098] The symbol length N of the SL-PRS;

[0099] Frequency domain configuration information of the SL-PRS;

[0100] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0101] From this we can see that by 1 st -stage SCI and / or 2 nd -stage SCI indicates: at least one of the SL-PRS Resource ID, the symbol length N of the SL-PRS, and the frequency domain configuration information of the SL-PRS, so that based on this information, the above-mentioned method 1 can be adopted to map the time domain resources and frequency domain resources used to send or receive SL-PRS.

[0102] The SL-PRS frequency domain configuration information may include at least one of the following:

[0103] SL-PRS Resource ID, SL-PRS frequency domain pattern, and comb offset.

[0104] Here, when REoffset configuration is a parameter based on resource pool configuration or preconfiguration, 1 st -stage SCI and / or 2 nd -stage does not need to specify this parameter. Comb offset is REoffset, which indicates the comb offset configuration.

[0105] It should be noted that an SL-PRS resource refers to a time-frequency resource used for SL-PRS transmission within a unit time (e.g., a time slot) in a positioning dedicated resource pool; wherein, an SL-PRS resource is associated with at least one of the following characteristics:

[0106] SL-PRS Resource ID;

[0107] SL-PRS comb offset and the related SL-PRS comb size;

[0108] SL-PRS starting symbol position and symbol length N;

[0109] SL-PRS frequency domain allocation;

[0110] Other time domain information.

[0111] That is, within a slot in the positioning dedicated resource pool, an SL-PRS resource can be identified by a unique SL-PRS resource ID.

[0112] Mode 2: Optionally, the time domain configuration information of the SL-PRS further includes the time domain starting symbol position of the SL-PRS; the above step B1 "determining M consecutive symbols in the first resource that do not overlap with the third resource to obtain the target time domain resource" includes the following step E1:

[0113] Step E1: According to the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, determine M consecutive symbols in the first resource to obtain the target time domain resource

[0114] It can be seen from this that if the time domain starting symbol position and symbol length N of the SL-PRS are known, M consecutive symbols for sending or receiving the SL-PRS can be mapped in the first resource.

[0115] In addition, it should be noted that the above-mentioned method 2 is a method for mapping the time domain resources of SL-PRS. For the frequency domain resource mapping method of SL-PRS, the frequency domain resources used for sending or receiving SL-PRS can be mapped based on the frequency domain configuration information of SL-PRS.

[0116] Optionally, the first information indicates at least one of the following:

[0117] Identification information of the SL-PRS resource;

[0118] The time domain starting symbol position of the SL-PRS;

[0119] The symbol length N of the SL-PRS;

[0120] Frequency domain configuration information of the SL-PRS;

[0121] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0122] From this we can see that by 1 st -stage SCI and / or 2 nd -stage SCI indicates at least one of: SL-PRS Resource ID, time domain starting symbol position of SL-PRS, symbol length N of SL-PRS, and frequency domain configuration information of SL-PRS, so that based on this information, the time domain resources and frequency domain resources used to send or receive SL-PRS can be mapped using the above-mentioned method 2.

[0123] As can be seen from the above, the time domain configuration information of SL-PRS includes at least one of the following:

[0124] SL-PRS Resource ID, starting symbol position, and symbol length N.

[0125] Optionally, the time domain configuration information of the SL-PRS is associated with the pattern information of the DMRS.

[0126] Among them, the currently used DMRS pattern can be configured or pre-configured through high-level parameters, so that the SL-PRS time domain configuration information corresponding to the currently used DMRS pattern can be determined based on the association between the SL-PRS time domain configuration information and the DMRS pattern, and thus the time domain resources used to send or receive SL-PRS can be mapped based on the SL-PRS time domain configuration information corresponding to the currently used DMRS pattern.

[0127] Alternatively, a combination mode of the DMRS pattern and the SL-PRS time domain configuration information may be configured, so that the time domain resources used to send or receive SL-PRS can be mapped directly based on the SL-PRS time domain configuration information in the combination mode of the currently used DMRS pattern.

[0128] Among them, according to the determined SL-PRS time domain configuration information, the specific method of mapping the time domain resources used to send or receive SL-PRS can be the above-mentioned method one or method two.

[0129] The following is an explanation of the mapping method of the time domain resources of the SL-PRS when the time domain configuration information of the SL-PRS is associated with the DMRS pattern, in combination with the following second and third embodiments.

[0130] Implementation method 2: SL-PRS time domain mapping method 2, including the following steps 2.1 to 2.3:

[0131] Step 2.1: When different DMRS patterns are configured by higher-layer parameters, one or more supported SL-PRS symbol length configuration sets are configured or pre-configured by higher-layer parameters;

[0132] Step 2.2: After determining the currently used DMRS pattern (i.e., selecting one from different DMRS patterns configured by higher-layer parameters), select a SL-PRS symbol number N from the SL-PRS symbol length configuration set based on the number of SL-PRS symbols that can be supported under the currently used DMRS pattern;

[0133] Step 2.3: Based on the number of SL-PRS symbols N selected in step 2.2, execute steps 1.1 to 1.3 of the first embodiment to perform SL-PRS time domain mapping.

[0134] Implementation method 3: SL-PRS time domain mapping method 3, specifically as described in steps 3.1 to 3.2 below:

[0135] Step 3.1: When higher-layer parameters configure different DMRS patterns and corresponding SL-PRS time-domain configuration information, the physical layer determines the corresponding SL-PRS time-domain configuration information based on the selected DMRS pattern.

[0136] Step 3.2: Perform time domain mapping of the SL-PRS according to the SL-PRS time domain configuration information.

[0137] Among them, when the SL-PRS time domain configuration information includes the symbol length N of the SL-PRS, steps 1.1 to 1.3 of the above-mentioned implementation method one can be executed to perform SL-PRS time domain mapping; when the SL-PRS time domain configuration information includes the symbol length N of the SL-PRS and the time domain starting symbol position of the SL-PRS, the above-mentioned method two can be used to perform SL-PRS time domain resource mapping.

[0138] In addition, it should be noted that the frequency domain configuration information of the SL-PRS can also be associated with the DMRS pattern. In this case, the relevant explanation about the mapping of the frequency domain resources of the SL-PRS is similar to that of the above-mentioned second and third embodiments and will not be repeated here.

[0139] In addition, it should be noted that the time domain and / or frequency domain configuration information of the SL-PRS may also be directly configured or pre-configured by high-level parameters, may be predetermined by a protocol, or may be determined based on DMRS pattern information.

[0140] Among them, for the SL-PRS time domain and / or frequency domain configuration information, when sending SL-PRS, the SL-PRS time domain configuration information can be configured by high-level parameters or pre-configured, and filled in to 1 st -stage SCI or 2 nd -stage SCI; when receiving SL-PRS, you can pass 1 st -stage SCI or 2 nd -stage SCI obtains SL-PRS time domain configuration information.

[0141] Optionally, the first overhead information of the SL-PRS is indicated by one of the following information:

[0142] The first-stage direct link control information;

[0143] High-level parameters;

[0144] Preconfiguration information.

[0145] Optionally, the first-stage direct link control information displays and indicates the first overhead information, or the first-stage direct link control information carries mode information of the first overhead information;

[0146] The mode information and second information of the first overhead information are associated with the first overhead information;

[0147] The second information includes at least one of DMRS mode information, the number of PSCCH symbols, the number of PSSCH symbols, the time-frequency configuration information of the phase tracking reference signal PT-RS, and the time-frequency configuration information of the channel state information reference signal CSI-RS.

[0148] From this we can see that through 1 st The specific case where the -stage SCI indicates the first overhead information of the SL-PRS may be described as follows: Case 1 or Case 2.

[0149] Case 1: As shown in Table 1 and Table 2, through 1 st -The reserved bits in the stage SCI explicitly indicate the overhead information of the SL-PRS:

[0150] Table 1 SL-PRS overhead information indication method 1

[0151] Table 2 SL-PRS overhead information indication method 2

[0152] Case 2: As shown in Table 3 and Table 4, through 1 st -stage The reserved bits in the SCI implicitly indicate the overhead information of the SL-PRS, that is, through 1 st The reserved bits in the -stage SCI implicitly indicate the SL-PRS overhead pattern, thereby determining the final SL-PRS overhead in combination with at least one of the following information: DMRS pattern information, number of PSCCH symbols, number of PSSCH symbols, PT-RS time-frequency configuration information, and CSI-RS time-frequency configuration information.

[0153] For example, as shown in Table 3 and Table 4, 1 st -The reserved bits in the stage SCI can carry the SL-PRS overhead mode, and the overhead mode and DMRS mode are associated with the specific SL-PRS overhead information. The specific SL-PRS overhead information can be determined based on the SL-PRS overhead mode and DMRS mode.

[0154] Table 3 SL-PRS overhead information indication method 3

[0155] Table 4 SL-PRS overhead information indication mode 4

[0156] Optionally, the method further includes:

[0157] Step F1: calculating a first rate matching of the second-stage direct link control information according to the first overhead information, and calculating a transport block size of the PSSCH according to the first rate matching;

[0158] or,

[0159] Step F2: Calculating a second rate matching of the second-stage direct link control information, and calculating a transport block size of the PSSCH according to the target overhead information and the second rate matching;

[0160] or,

[0161] Step F3: calculating a first rate matching of the second-stage direct link control information according to the first overhead information, and calculating a transport block size of the PSSCH according to the first rate matching and the first overhead information;

[0162] The target overhead information is the first overhead information or the second overhead information, and the second overhead information is the overhead information of the SL-PRS indicated by the second-stage direct link control information.

[0163] From the above steps F1 to F3, it can be seen that the above 1 st -stage SCI, high-layer parameters, the first overhead information of the SL-PRS indicated by one of the pre-configuration information, is used to calculate 2 nd -stage SCI rate matching (Rate matching) and / or PSSCH transport block size (Transport Block Size, TBS); or, the above 2 nd The second overhead information of the SL-PRS indicated by the -stage SCI is used to calculate the TBS of the PSSCH.

[0164] In addition, when receiving SL-PRS, 2 nd -stage SCI rate matching and PSSCH TBS calculation require attention to the following:

[0165] (1) With respect to the above step F1, "calculating the first rate matching of the second-stage direct link control information according to the first overhead information, and calculating the transport block size of the PSSCH according to the first rate matching":

[0166] When the first overhead information is 1 st -stage SCI indicates that the receiving device first receives PSCCH and decodes 1 st -stage SCI determines the first overhead information, and then calculates 2 based on the first overhead information nd-stage SCI first rate matching, then determines the 2 in PSSCH nd -stage SCI mapping situation, for 2 nd -stage SCI is decoded, and then the TBS of PSSCH is calculated according to the first rate matching, and the data in PSSCH is decoded and the SL-PRS is received;

[0167] When the first overhead information is configured by a high-level parameter or pre-configured, the receiving device first receives the PSCCH and decodes 1 st -stage SCI, then calculate 2 based on the first overhead information nd -stage SCI first rate matching, then determines the 2 in PSSCH nd -stage SCI mapping situation, for 2 nd -stage SCI is decoded, and then the TBS of PSSCH is calculated according to the first rate matching, and the data in PSSCH is decoded and the SL-PRS is received.

[0168] Here, the process of calculating the TBS of the PSSCH according to the first rate matching may be specifically described in step H1 or H2 below.

[0169] (2) With respect to the above step F2 "calculating the second rate matching of the second-stage direct link control information, and calculating the transport block size of the PSSCH according to the target overhead information and the second rate matching":

[0170] The receiving device first receives PSCCH and decodes 1 st -stage SCI, then calculate 2 nd -stage SCI second rate matching, and then determines the 2 in PSSCH nd -stage SCI mapping situation, for 2 nd -stage SCI is decoded, and then the TBS of PSSCH is calculated according to the target overhead information and the second rate matching, and the data in PSSCH is decoded and the SL-PRS is received.

[0171] (3) With respect to the above step F3: "calculating a first rate matching of the second-stage direct link control information based on the first overhead information, and calculating a transport block size of the PSSCH based on the first rate matching and the first overhead information":

[0172] When the first overhead information is 1 st -stage SCI indicates that the receiving device first receives PSCCH and decodes 1 st-stage SCI determines the first overhead information, then calculates 2 nd -stage SCI first rate matching, then determines the 2 in PSSCH nd -stage SCI mapping situation, for 2 nd -stage SCI is decoded, and then the PSSCH transport block size is calculated according to the first rate matching and the first overhead information, and the data in the PSSCH is decoded and the SL-PRS is received;

[0173] When the first overhead information is configured by a high-level parameter or pre-configured, the receiving device first receives the PSCCH and decodes 1 st -stage SCI, then calculate 2 based on the first overhead information nd -stage SCI first rate matching, then determines the 2 in PSSCH nd -stage SCI mapping situation, for 2 nd -stage SCI is decoded, and then the PSSCH transport block size is calculated according to the first rate matching and the first overhead information, and the data in the PSSCH is decoded and the SL-PRS is received.

[0174] It should also be noted that in the scenario of sending SL-PRS, the sending device first calculates 2 nd -stage SCI rate matching, and then calculate the TBS of PSSCH, so that the total number of available REs of PSSCH can be determined, which can be used to determine the 2 nd After mapping the number of REs of the -stage SCI and the TBS of the PSSCH, the PSCCH and PSCCH DMRS are mapped in combination with the specific DMRS pattern, the PSSCH DMRS is mapped, and then the 2nd-stage SCI is mapped, and then the SL-PRS can be mapped.

[0175] The following are the following introductions to the above steps F1 to F3:

[0176] For step F1:

[0177] From step F1, we can know that according to 1 st -stage SCI indicates the first overhead information, calculate 2 nd -stage SCI first rate matching, and then calculate the TBS of PSSCH according to the first rate matching; or, calculate 2 according to the first overhead information configured by the high-level parameters or pre-configured information nd -stage SCI first rate matching, and then calculate the TBS of PSSCH based on the first rate matching.

[0178] Optionally, in step F1, calculating the transport block size of the PSSCH according to the first rate matching includes:

[0179] Step H1: Calculate the transport block size of the PSSCH according to the first rate matching and at least one of the second overhead information, the time domain configuration information of the SL-PRS, and the frequency domain configuration information of the SL-PRS;

[0180] or,

[0181] Step H2: Calculate the transport block size of the PSSCH according to the first rate matching and high-layer parameter configuration or pre-configured SL-PRS overhead information.

[0182] From step H1, we know that if 1 st -stage SCI, high-level parameters, and the first overhead information indicated by one of the pre-configuration information are only used to calculate 2 nd -stage SCI first rate matching, then, according to the first rate matching, combined with 2 nd -Calculate the TBS of the PSSCH based on at least one of the second overhead information indicated by the stage SCI, the time domain configuration information of the SL-PRS, and the frequency domain configuration information of the SL-PRS.

[0183] From step H2, we know that if 1 st -stage SCI, high-level parameters, and the first overhead information indicated by one of the pre-configuration information are only used to calculate 2 nd -stage SCI first rate matching, then, the TBS of the PSSCH can also be calculated based on the first rate matching and in combination with high-layer parameter configuration or other overhead information of the pre-configured SL-PRS.

[0184] For step F2:

[0185] As can be seen from step F2, the rate matching calculation method in the related art (ie, the method without combining SL-PRS overhead information) can be used to calculate 2 nd -stage SCI second rate matching, thereby matching the second rate, and 1 st -stage SCI, high-level parameters, pre-configuration information, one of the first overhead information indicated, calculate the TBS of PSSCH; or, the rate matching calculation method in the related art can be used to calculate 2 nd -stage SCI second rate matching, thereby according to the second rate matching, and 2 nd-The second overhead information indicated by the stage SCI is used to calculate the TBS of the PSSCH.

[0186] For step F3:

[0187] From step F3, we can know that according to 1 st -stage SCI, high-layer parameters, pre-configuration information, one of the first overhead information calculation 2 nd -stage SCI first rate matching, and then calculating the TBS of the PSSCH according to the first rate matching and the first overhead information.

[0188] From the above steps F1 to F3, it can be seen that the embodiment of the present application provides a method of introducing SL-PRS into the shared resource pool. nd -stage SCI rate matching calculation method, and PSSCH TBS calculation method.

[0189] The following describes in detail the method for calculating the first rate matching, the second rate matching, and the TBS of the PSSCH in conjunction with the following fourth to sixth embodiments.

[0190] Implementation method 4: Calculation method for the first rate matching:

[0191] Among them, calculation 2 nd -stage SCI Rate matching, that is, calculation 2 nd -stage SCI coded modulation symbol number Q′ SCI2 (that is, the number of REs occupied);

[0192] In addition, according to formula (1), 2 nd -stage SCI coded modulation symbol number Q′ SCI2 :

[0193] Among them, O SCI2 Representation 2 nd -The number of bits of stage SCI.

[0194] L SCI2 Representation 2 nd -stage SCI’s 24bits CRC bits.

[0195] By 1 st -stage SCI directive.

[0196] Indicates the number of subcarriers included in the PSSCH transmission bandwidth.

[0197] Indicates the number of PSCCH and PSCCH DMRS subcarriers associated with the PSSCH on the lth Orthogonal Frequency Division Multiplexing (OFDM) symbol. Indicates that on the OFDM symbol l transmitted by PSSCH, it can be used for 2 nd -stage SCI transmission resource element (RE) number, where

[0198] (i.e., sl-lengthSymbols minus 2). sl-lengthSymbols is a high-level parameter that indicates the number of sidelink symbols in a slot.

[0199] If the higher-layer parameter physical direct link feedback channel period (sl-PSFCH-Period) = 2 or 4, then when the PSFCH overhead indication field in SCI format 1-A (i.e., 1st-stage SCI format 1-A) indicates "1", otherwise, If the higher layer parameter sl-PSFCH-Period = 0, then If the higher layer parameter sl-PSFCH-Period = 1, then

[0200] The value of can be determined by one of the following methods:

[0201] (1) Through SCI format 1-A (i.e. 1 st -stage SCI) in the SL-PRS overhead indication domain determined;

[0202] (2) Configured or pre-configured by high-level parameters;

[0203] (3) Preset a specific value based on the DMRS pattern.

[0204] Right now Indicates the above-mentioned first overhead information.

[0205] γ represents 2 nd-The number of unoccupied REs in the resource block (RB) where the last coded symbol of the stage SCI is located; It should be noted that in calculating the 2 in TBS nd -stage SCI rate matching, assuming γ = 0; if 2 nd -stage When SCI is a 2-layer mapping, it should be copied for the 2nd layer first.

[0206] R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A;

[0207] α is the high-level parameter scaling parameter (sl-Scaling) configuration.

[0208] Implementation method five: calculation method for the second rate matching:

[0209] Among them, calculation 2 nd -stage SCI Rate matching, that is, calculation 2 nd -stage SCI coded modulation symbol number Q′ SCI2 ;

[0210] In addition, according to formula (1), 2 nd -stage SCI coded modulation symbol number Q′ SCI2 :

[0211] Among them, O SCI2 Representation 2 nd -The number of bits of stage SCI.

[0212] L SCI2 Representation 2 nd -stage SCI’s 24bits CRC bits.

[0213] By 1 st -stage SCI directive.

[0214] Indicates the number of subcarriers included in the PSSCH transmission bandwidth.

[0215] Indicates the number of PSCCH and PSCCH DMRS subcarriers associated with PSSCH on the lth OFDM symbol.

[0216] Indicates that on the OFDM symbol l transmitted by PSSCH, it can be used for 2 nd -stage SCI number of REs transmitted, where

[0217] sl-lengthSymbols is a high-level parameter that indicates the number of sidelink symbols in a slot.

[0218] If the higher layer parameter sl-PSFCH-Period = 2 or 4, then when the PSFCH overhead indication field in SCI format 1-A indicates "1", otherwise, If the higher layer parameter sl-PSFCH-Period = 0, then If the higher layer parameter sl-PSFCH-Period = 1, then

[0219] γ represents 2 nd -The number of unoccupied REs in the RB where the last coded symbol of the stage SCI is located;

[0220] R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A;

[0221] α is the high-level parameter sl-Scaling configuration.

[0222] It should be noted that, in the above-mentioned fourth and fifth embodiments, The calculation formula is different.

[0223] Implementation method 6: a method for calculating the TBS of the PSSCH without combining the overhead information of the SL-PRS, including the following steps 6.1 to 6.3:

[0224] Step 6.1: Calculate the total number of REs N′ allocated to PSSCH in a physical resource block (PRB) according to formula (2). RE :

[0225] in, Indicates that one RB includes 12 subcarriers.

[0226] sl-LengthSymbols is a parameter provided by the upper layer and is used to indicate the number of sidelink symbols in a slot.

[0227] If the higher layer sl-PSFCH-Period=2 or 4, then when the PSFCH overhead indication field in SCI format 1-A indicates "1", otherwise, If the higher layer parameter sl-PSFCH-Period = 0, then If the higher layer parameter sl-PSFCH-Period = 1, then

[0228] Indicates the overhead value indicated by the higher-layer parameter sidelink overhead information (sl-X-Overhead).

[0229] Determine according to the high-layer parameter SL-shared channel DMRS time domain pattern list configuration information (sl-PSSCH-DMRS-TimePatternList) sl-PSSCH-DMRS-TimePatternList and Table 5:

[0230] Table 5 The value of

[0231] Step 6.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0232] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0233] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0234] Indicates that 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth embodiment above) SCI2 ).

[0235] Step 7.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0236] Embodiment 7: Method 1 for calculating the TBS of the PSSCH in combination with the overhead information of the SL-PRS, including the following steps 7.1 to 7.3:

[0237] Step 7.1: Calculate the total number of REs N′ allocated to PSSCH in a physical resource block (PRB) according to formula (4). RE :

[0238] in, Indicates that one RB includes 12 subcarriers.

[0239] sl-LengthSymbols is a parameter provided by the upper layer and is used to indicate the number of sidelink symbols in a slot.

[0240] If the higher layer sl-PSFCH-Period=2 or 4, then when the PSFCH overhead indication field in SCI format 1-A indicates "1", otherwise, If the higher layer parameter sl-PSFCH-Period = 0, then If the higher layer parameter sl-PSFCH-Period = 1, then

[0241] The value of can be determined by one of the following methods:

[0242] (1) Pass 1 st -stage SCI or 2 nd -The SL-PRS overhead indication field or the SL-PRS time-domain symbol number information in the stage SCI is determined;

[0243] (2) Configured or pre-configured by high-level parameters

[0244] (3) Preset specific values ​​based on DMRS pattern

[0245] Right now Indicates SL-PRS overhead information.

[0246] Indicates the overhead value indicated by the higher-layer parameter sl-X-Overhead.

[0247] Determined according to the higher-layer parameter sl-PSSCH-DMRS-TimePatternList and the above Table 5.

[0248] Step 7.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0249] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0250] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0251] Indicates that 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth embodiment above) SCI2 ).

[0252] Step 7.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0253] It should be noted that in the seventh and sixth embodiments, N′ is calculated RE The formula is different.

[0254] Embodiment 8: Method 2 for calculating the TBS of the PSSCH in combination with the overhead information of the SL-PRS, including the following steps 8.1 to 8.3:

[0255] Step 8.1: Calculate the total number of REs N′ allocated to PSSCH in the PRB according to formula (5) RE :

[0256] in, Indicates that one RB includes 12 subcarriers;

[0257] sl-LengthSymbols is a parameter provided by the upper layer and is used to indicate the number of sidelink symbols in a slot.

[0258] If the higher layer sl-PSFCH-Period=2 or 4, then when the PSFCH overhead indication field in SCI format 1-A indicates "1", otherwise, If the higher layer parameter sl-PSFCH-Period = 0, then If the higher layer parameter sl-PSFCH-Period = 1, then

[0259] The value of can be determined by one of the following methods:

[0260] (1) Pass 1 st -stage SCI or 2 nd -The SL-PRS overhead indication field or the SL-PRS time-domain symbol number information in the stage SCI is determined;

[0261] (2) Configured or pre-configured by high-level parameters

[0262] (3) Preset specific values ​​based on DMRS pattern

[0263] Right now Indicates SL-PRS overhead information.

[0264] Num_comb by 1 st -stage SCI or 2 nd -stage SCI indication, either configured by higher-layer parameters or pre-configured, indicates the comb size used by the SL-PRS. If comb_size ≥ 6, it is possible to support data and SL-PRS multiplexing in the same symbol.

[0265] It can be additionally limited that only when comb_size>=6, Num_comb=comb_size; otherwise, Num_comb=1;

[0266] Indicates the overhead value indicated by the higher-layer parameter sl-X-Overhead.

[0267] Determined according to the high-level parameter sl-PSSCH-DMRS-TimePatternList and the above Table 1.

[0268] Step 8.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0269] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0270] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0271] Indicates that 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth embodiment above) SCI2 ).

[0272] That is, the calculation process of step 7.2 is the same as the calculation process of step 5.2 above.

[0273] Step 8.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0274] It should also be noted that, in order to maintain backward compatibility, the original 2 can be used directly regardless of whether the transport block (i.e., sidelink transmission) contains SL-PRS and the SL-PRS overhead issue does not need to be considered. nd -stage SCI rate matching calculation process (ie, the fifth embodiment above), and / or PSSCH TBS calculation process (ie, the sixth embodiment above).

[0275] Optionally, the symbol length N of the SL-PRS is configured according to at least one of the following:

[0276] Number of PSCCH symbols;

[0277] Number of PSSCH symbols;

[0278] DMRS model information;

[0279] CSI-RS time-frequency configuration information;

[0280] PT-RS time-frequency configuration information;

[0281] The number of symbols of the physical direct link feedback channel PSFCH.

[0282] Optionally, sending or receiving the SL-PRS includes:

[0283] The SL-PRS is received or sent in at least one of the following situations:

[0284] The mode of the second-stage direct link control information is a preset mode;

[0285] The first-stage direct link control information indicates first overhead information of the SL-PRS;

[0286] The first-stage direct link control information indicates that the current transmission or reception includes the SL-PRS.

[0287] The above-mentioned preset mode may be, for example, a 2D mode.

[0288] From this we can see that if 2 nd -stage SCI mode is a preset mode (such as 2D mode), or 1 st -stage SCI indicates the first overhead information of SL-PRS, or, 1 st -stage SCI indicates that the current transmission includes SL-PRS, then the sending device sends SL-PRS; if 2 nd -stage SCI mode is a preset mode (such as 2D mode), or 1 st -stage SCI indicates the first overhead information of SL-PRS, or, 1 st -stage SCI indicates that the current transmission includes SL-PRS, and the receiving device receives SL-PRS.

[0289] In summary, in the embodiment of the present application, the device sending the SL-PRS and the device receiving the SL-PRS perform time domain resource mapping of the SL-PRS and calculate 2 nd The process of rate matching for -stage SCI and calculating PSSCH TBS is the same.

[0290] It is understandable that the various embodiments described above in this application can be combined in any way. The following is an example of the overall application process of the above embodiments, as shown in 9.1 to 9.5:

[0291] Step 9.1: Calculation 2 nd -stage SCI rate matching;

[0292] Among them, the above-mentioned fourth or fifth implementation scheme can be adopted to calculate 2 nd -stage SCI rate matching.

[0293] Step 9.2: Calculate the TBS of the PSSCH to determine the number of bits that the PSSCH carries data.

[0294] Among them, one of the above-mentioned implementation methods 6, 7, and 8 can be used to calculate the TBS of the PSSCH.

[0295] Step 9.3: Determine 2 ndAfter mapping the number of REs for the -stage SCI and the TBS of the PSSCH, the PSCCH and PSCCH DMRS are mapped in combination with the specific DMRS pattern, the PSSCH DMRS is mapped, and then the 2nd-stage SCI is mapped.

[0296] Step 9.4: Map SL-PRS;

[0297] Among them, the SL-PRS can be mapped using one of the methods in the above-mentioned embodiment 1, embodiment 2, and embodiment 3.

[0298] Step 9.5: Map the data REs of PSSCH.

[0299] There is no mandatory requirement for the order of steps 9.4 and 9.5.

[0300] In summary, the embodiments of the present application solve the following problems:

[0301] (1) After introducing SL-PRS transmission in the shared resource pool, 2 nd -stage SCI rate matching calculation problem, otherwise it will affect the encoding and decoding of 2nd-stage SCI;

[0302] (2) Solved the TBS calculation problem of PSSCH after the introduction of SL-PRS transmission in the shared resource pool, otherwise it would affect the problem of different TBS results calculated during retransmission merging;

[0303] (3) A SL-PRS mapping rule is introduced in the shared resource pool to solve the problems of SL-PRS resource indication and compatibility.

[0304] The channel sending or receiving method provided in the embodiment of the present application can be executed by a channel sending or receiving device. In the embodiment of the present application, the channel sending or receiving device performing the channel sending or receiving method is used as an example to illustrate the channel sending or receiving device provided in the embodiment of the present application.

[0305] In a second aspect, an embodiment of the present application provides a channel sending or receiving device. As shown in FIG4 , the channel sending or receiving device 400 includes the following modules:

[0306] The sending or receiving module 401 is configured to send or receive a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or send or receive the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS;

[0307] The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS;

[0308] The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

[0309] Optionally, the sending or receiving module 401 includes:

[0310] a resource mapping submodule, configured to determine, in a first resource, a target time domain resource that can be used to send or receive the SL-PRS according to the time domain configuration information of the SL-PRS, wherein the first resource is a time domain resource located after a second resource in a time unit of a shared resource pool, and the second resource is a time domain resource for sending or receiving the second-stage direct link control information;

[0311] The sending or receiving submodule is configured to send or receive the SL-PRS on the target time domain resource.

[0312] Optionally, the time domain configuration information of the SL-PRS includes a symbol length N of the SL-PRS; and the resource mapping submodule includes:

[0313] a resource mapping unit, configured to determine, in the first resource, M consecutive symbols that do not overlap with the third resource, to obtain the target time domain resource;

[0314] The third resource is a resource used to send or receive the first object, and the value of M is N or N+k1, where N and k1 are integers greater than zero.

[0315] Optionally, the first object includes a demodulation reference signal DMRS and / or a second object.

[0316] Optionally, the resource mapping unit includes:

[0317] A first resource mapping subunit is configured to determine a target symbol in a target symbol interval on the first resource, and determine the target symbol as the target time domain resource;

[0318] The target symbol interval includes: a first symbol interval, a symbol interval between every two DMRSs with an index difference of k2 on the first resource, and a second symbol interval, wherein the first symbol interval is a symbol interval between a reference symbol in the first resource and a symbol used to send or receive the first DMRS, and the second symbol interval is a symbol interval between a symbol used to send or receive the last DMRS in the first resource and a symbol at the end of the first resource, and k2 is a preset step size;

[0319] The first DMRS is a DMRS on the first resource, located after the reference symbol in the time domain and closest to the reference symbol;

[0320] The target symbol is M consecutive symbols that do not overlap with resources used to send or receive the second object, or the target symbol is M consecutive symbols.

[0321] Optionally, the first resource mapping subunit is specifically configured to:

[0322] Determining whether the target symbol exists in the first symbol interval;

[0323] In a case where the target symbol exists in the first symbol interval, determining the target symbol in the first symbol interval as the target time domain resource;

[0324] If the target symbol does not exist in the first symbol interval, set the value of Num to the index of the first DMRS;

[0325] Determine whether the DMRS with index Num is the last DMRS on the first resource;

[0326] In a case where the DMRS with an index of Num is not the last DMRS on the first resource, determining whether the target symbol exists in a third symbol interval between the DMRS with an index of Num and the DMRS with an index of Num+k2 on the first resource; if the target symbol exists in the third symbol interval, determining the target symbol in the third symbol interval as the target time domain resource; if the target symbol does not exist in the third symbol interval, setting Num to a current value plus k2, and returning to the step of determining whether the DMRS with an index of Num is the last DMRS on the first resource;

[0327] When the DMRS with index Num is the last DMRS on the first resource, determining whether the target symbol exists in the second symbol interval, and if the target symbol exists in the second symbol interval, determining the first symbol in the second symbol interval as the target time domain resource;

[0328] If the target symbol does not exist in the second symbol interval, it is determined that N is configured incorrectly.

[0329] Optionally, the time domain configuration information of the SL-PRS further includes a time domain starting symbol position of the SL-PRS; and the resource mapping unit includes:

[0330] The second resource mapping subunit is configured to determine M consecutive symbols in the first resource according to the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, to obtain the target time domain resource.

[0331] Optionally, the time domain configuration information of the SL-PRS is associated with the mode information of the DMRS.

[0332] Optionally, the first information indicates at least one of the following:

[0333] Identification information of the SL-PRS resource;

[0334] The symbol length N of the SL-PRS;

[0335] Frequency domain configuration information of the SL-PRS;

[0336] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0337] Optionally, the first information indicates at least one of the following:

[0338] Identification information of the SL-PRS resource;

[0339] The time domain starting symbol position of the SL-PRS;

[0340] The symbol length N of the SL-PRS;

[0341] Frequency domain configuration information of the SL-PRS;

[0342] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0343] Optionally, the first overhead information of the SL-PRS is indicated by one of the following information:

[0344] The first-stage direct link control information;

[0345] High-level parameters;

[0346] Preconfiguration information.

[0347] Optionally, the device further comprises:

[0348] A first calculation module is configured to calculate a first rate matching of the second-stage direct link control information according to the first overhead information, and calculate a transport block size of the PSSCH according to the first rate matching;

[0349] or,

[0350] A second calculation module is used to calculate the second rate matching of the second-stage direct link control information, and calculate the transport block size of the PSSCH according to the target overhead information and the second rate matching;

[0351] or,

[0352] a third calculation module, configured to calculate a first rate matching of the second-stage direct link control information according to the first overhead information, and calculate a transport block size of the PSSCH according to the first rate matching and the first overhead information;

[0353] The target overhead information is the first overhead information or the second overhead information, and the second overhead information is the overhead information of the SL-PRS indicated by the second-stage direct link control information.

[0354] Optionally, the first calculation module calculates the transport block size of the PSSCH according to the first rate matching, specifically for:

[0355] Calculate the transport block size of the PSSCH according to the first rate matching and at least one of the second overhead information, the time domain configuration information of the SL-PRS, and the frequency domain configuration information of the SL-PRS;

[0356] or,

[0357] The transport block size of the PSSCH is calculated according to the first rate matching and high-layer parameter configuration or pre-configured SL-PRS overhead information.

[0358] Optionally, the first-stage direct link control information displays and indicates the first overhead information, or the first-stage direct link control information carries mode information of the first overhead information;

[0359] The mode information and second information of the first overhead information are associated with the first overhead information;

[0360] The second information includes at least one of DMRS mode information, the number of PSCCH symbols, the number of PSSCH symbols, the time-frequency configuration information of the phase tracking reference signal PT-RS, and the time-frequency configuration information of the channel state information reference signal CSI-RS.

[0361] Optionally, the symbol length N of the SL-PRS is configured according to at least one of the following:

[0362] Number of PSCCH symbols

[0363] Number of PSSCH symbols

[0364] DMRS model information;

[0365] CSI-RS time-frequency configuration information

[0366] PT-RS time-frequency configuration information;

[0367] The number of symbols of the physical direct link feedback channel PSFCH.

[0368] Optionally, sending or receiving the SL-PRS includes:

[0369] The SL-PRS is received or sent in at least one of the following situations:

[0370] The mode of the second-stage direct link control information is a preset mode;

[0371] The first-stage direct link control information indicates first overhead information of the SL-PRS;

[0372] The first-stage direct link control information indicates that the current transmission or reception includes the SL-PRS. The channel transmission or reception device provided in the embodiment of the present application can implement the various processes implemented by the method embodiments of Figures 2 to 3 and achieve the same technical effects. To avoid repetition, it will not be repeated here.

[0373] As shown in Figure 5, an embodiment of the present application further provides a communication device 500, including a processor 501 and a memory 502. The memory 502 stores a program or instruction that can be run on the processor 501. For example, when the communication device 500 is a terminal, the program or instruction is executed by the processor 501 to implement the various steps of the above-mentioned channel sending or receiving method embodiment, and can achieve the same technical effect. When the communication device 500 is a network-side device, the program or instruction is executed by the processor 501 to implement the various steps of the above-mentioned channel sending or receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0374] 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 channel sending or receiving method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0375] 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), random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0376] 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 channel sending or receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0377] 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.

[0378] 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 channel sending or receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0379] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments 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 the opposite 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.

[0380] Through the description of the above embodiments, 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-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0381] 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 this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A channel sending or receiving method, the method comprising: Send or receive a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or send or receive the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS; The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS; The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

2. The method according to claim 1, wherein: Sending or receiving the SL-PRS comprises: Determine, according to the time domain configuration information of the SL-PRS, a target time domain resource that can be used to send or receive the SL-PRS in a first resource, wherein the first resource is a time domain resource located after a second resource in a time unit of a shared resource pool, and the second resource is a time domain resource for sending or receiving second-stage direct link control information; The SL-PRS is sent or received on the target time domain resource.

3. The method according to claim 2, wherein: The time domain configuration information of the SL-PRS includes the symbol length N of the SL-PRS; The determining, in the first resource, a target time domain resource that can be used to send or receive the SL-PRS according to the time domain configuration information of the SL-PRS includes: Determine, in the first resource, M consecutive symbols that do not overlap with the third resource, to obtain the target time domain resource; The third resource is a resource used to send or receive the first object, the value of M is N or N+k1, and N and k1 are integers greater than zero respectively.

4. The method according to claim 3, wherein: The first object includes a demodulation reference signal DMRS and / or a second object.

5. The method according to claim 4, wherein: The determining, in the first resource, M continuous symbols that do not overlap with the third resource, to obtain the target time domain resource includes: Determine a target symbol in a target symbol interval on the first resource, and determine the target symbol as the target time domain resource; The target symbol interval includes: a first symbol interval, a symbol interval between every two DMRSs with an index difference of k2 on the first resource, and a second symbol interval, wherein the first symbol interval is a symbol interval between a reference symbol in the first resource and a symbol used to send or receive the first DMRS, and the second symbol interval is a symbol interval between a symbol used to send or receive the last DMRS in the first resource and a symbol at the end of the first resource, and k2 is a preset step size; The first DMRS is a DMRS on the first resource, which is located after the reference symbol in the time domain and is closest to the reference symbol; The target symbol is M consecutive symbols that do not overlap with resources used to send or receive the second object, or the target symbol is M consecutive symbols.

6. The method according to claim 5, wherein: The determining a target symbol in a target symbol interval on the first resource, and determining the target symbol as the target time domain resource, includes: Determine whether the target symbol exists in the first symbol interval; In a case where the target symbol exists in the first symbol interval, determining the target symbol in the first symbol interval as the target time domain resource; When the target symbol does not exist in the first symbol interval, setting the value of Num to the index of the first DMRS; Determine whether the DMRS with index Num is the last DMRS on the first resource; In the case where the DMRS with an index of Num is not the last DMRS on the first resource, determine whether the target symbol exists in the third symbol interval between the DMRS with an index of Num and the DMRS with an index of Num+k2 on the first resource, and in the case where the target symbol exists in the third symbol interval, determine the target symbol in the third symbol interval as the target time domain resource, and in the case where the target symbol does not exist in the third symbol interval, set Num to the current value plus k2, and return to the step of determining whether the DMRS with an index of Num is the last DMRS on the first resource; In a case where the DMRS with index Num is the last DMRS on the first resource, determining whether the target symbol exists in the second symbol interval, and in a case where the target symbol exists in the second symbol interval, determining the first symbol in the second symbol interval as the target time domain resource; When the target symbol does not exist in the second symbol interval, it is determined that N is configured incorrectly.

7. The method according to claim 3 or 4, wherein: The time domain configuration information of the SL-PRS also includes the time domain starting symbol position of the SL-PRS; The mapping in the first resource to determine that M consecutive symbols that do not overlap with the third resource to obtain the target time domain resource includes: According to the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, M consecutive symbols are determined in the first resource to obtain the target time domain resource.

8. The method according to any one of claims 2 to 7, wherein: The time domain configuration information of the SL-PRS is associated with the mode information of the DMRS.

9. The method according to any one of claims 3 to 6, wherein: The first information indicates at least one of the following: Identification information of the SL-PRS resource; The symbol length N of the SL-PRS; Frequency domain configuration information of the SL-PRS; The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

10. The method according to claim 7, wherein: The first information indicates at least one of the following: Identification information of the SL-PRS resource; The time domain starting symbol position of the SL-PRS; The symbol length N of the SL-PRS; Frequency domain configuration information of the SL-PRS; The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

11. The method according to any one of claims 1 to 10, wherein: The first overhead information of the SL-PRS is indicated by one of the following information: The first stage direct link control information; High-level parameters; Preconfiguration information.

12. The method according to claim 11, wherein: The method further comprises: Calculate a first rate matching of the second-stage direct link control information according to the first overhead information, and calculate a transport block size of the PSSCH according to the first rate matching; or, Calculate the second rate matching of the second-stage direct link control information, and calculate the transport block size of the PSSCH according to the target overhead information and the second rate matching; or, Calculate a first rate matching of the second-stage direct link control information according to the first overhead information, and calculate a transport block size of the PSSCH according to the first rate matching and the first overhead information; The target overhead information is the first overhead information or the second overhead information, and the second overhead information is the overhead information of the SL-PRS indicated by the second-stage direct link control information.

13. The method according to claim 12, wherein: The calculating the transport block size of the PSSCH according to the first rate matching includes: Calculate the transport block size of the PSSCH according to the first rate matching, and at least one of the second overhead information, the time domain configuration information of the SL-PRS, and the frequency domain configuration information of the SL-PRS; or, The transport block size of the PSSCH is calculated according to the first rate matching and high-layer parameter configuration or pre-configured overhead information of the SL-PRS.

14. The method according to any one of claims 11 to 13, wherein: The first-stage direct link control information displays and indicates the first overhead information, or the first-stage direct link control information carries mode information of the first overhead information; The mode information and the second information of the first overhead information are associated with the first overhead information; The second information includes DMRS mode information, the number of PSCCH symbols, the number of PSSCH symbols, the time-frequency configuration information of the phase tracking reference signal PT-RS, and the time-frequency configuration information of the channel state information reference signal CSI-RS. At least one.

15. The method according to any one of claims 3 to 7, wherein: The symbol length N of the SL-PRS is configured according to at least one of the following: Number of PSCCH symbols Number of PSSCH symbols DMRS model information; CSI-RS time-frequency configuration information Time and frequency configuration information of PT-RS; The number of symbols of the physical direct link feedback channel PSFCH.

16. The method according to any one of claims 1 to 15, wherein: The sending or receiving of the SL-PRS comprises: In at least one of the following cases, the SL-PRS is received or sent: The mode of the second-stage direct link control information is a preset mode; The first-stage direct link control information indicates first overhead information of the SL-PRS; The first-stage direct link control information indicates that the current transmission or reception includes the SL-PRS.

17. A channel sending or receiving device, the device comprising: A sending or receiving module, used to send or receive a physical direct link control channel PSCCH and a physical direct link shared channel PSSCH, or to send or receive the PSCCH, the PSSCH and a direct link positioning reference signal SL-PRS; The PSCCH is used to carry the first-stage direct link control information, and the first-stage direct link control information is used to schedule at least one of the PSSCH, the second-stage direct link control information, and the SL-PRS; The PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode the PSSCH and / or schedule the SL-PRS.

18. A communication device, comprising 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 channel sending or receiving method according to any one of claims 1 to 16 are implemented.

19. A readable storage medium storing a program or an instruction, wherein the program or the instruction, when executed by a processor, implements the channel sending or receiving method according to any one of claims 1 to 16.

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