Channel sending or receiving method and device and communication equipment

Abstract

The invention discloses a channel sending or receiving method and device and communication equipment, and belongs to the technical field of communication, and the channel sending or receiving method comprises the following steps: sending or receiving a physical straight-through link control channel (PSCCH) and a physical straight-through link shared channel (PSSCH), or sending or receiving the PSCCH, the PSSCH and a straight-through link positioning reference signal (SL-PRS); wherein the PSCCH is used for bearing first-stage direct connection link control information, and the first-stage direct connection link control information is used for scheduling at least one of the PSSCH, second-stage direct connection link control information and the SL-PRS; the PSSCH carries data and the second stage direct connection link control information, and the second stage direct connection link control information is used for decoding the PSSCH and / or scheduling the SL-PRS.

Description

Technical Field

[0001] 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

[0002] 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.

[0003] 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 (sidelink-positioning reference signal, SL-PRS) transmitted between terminals, so that the terminals can complete the relative positioning process between terminals directly in the direct link without relying on the base station.

[0004] 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 prior art does not provide a channel structure that can be applied after the SL-PRS is introduced into the shared resource pool. Summary of the invention

[0005] 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 SL-PRS is introduced into a shared resource pool.

[0006] In a first aspect, a channel sending or receiving method is provided, the method comprising:

[0007] 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;

[0008] 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;

[0009] 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.

[0010] In a second aspect, a channel sending or receiving device is provided, the device comprising:

[0011] 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;

[0012] 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;

[0013] 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.

[0014] According to a third aspect, a communication device 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.

[0015] In a fourth aspect, a communication device is provided, comprising a processor and a communication interface, wherein the communication interface is 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;

[0016] 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;

[0017] 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.

[0018] 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.

[0019] 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 used to run a program or instruction to implement the method described in the first aspect.

[0020] 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.

[0021] 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, the second-stage direct link control information, and SL-PRS; PSSCH carries data and the second-stage direct link control information, and the second-stage direct link control information is used to decode 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 realizing direct link positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a channel structure in the prior art;

[0023] Figure 2 It is a flow chart of a channel sending or receiving method in an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of a channel structure in an embodiment of the present application;

[0025] Figure 4 is a structural block diagram of a channel sending or receiving device in an embodiment of the present application;

[0026] Figure 5 It is a structural block diagram of a communication device in an embodiment of the present application. DETAILED DESCRIPTION

[0027] 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.

[0028] The terms "first", "second", etc. of the present 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 one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present 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 with each other 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 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 the 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 th Generation, 6G) communication system.

[0029] First, in order to facilitate understanding of the channel sending or receiving method of the embodiment of the present application, the following contents are introduced.

[0030] In the prior art, Figure 1As shown in FIG. 1 , in the shared resource pool, the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH) use time division multiplexing (TDM) + frequency division multiplexing (FDM) and introduce the second-stage sidelink 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.

[0031] Among them, in order to implement the SL-Positioning technology, sending SL-PRS in the resource pool corresponding to the protocol version 16 (Release 16, R16) or the protocol version 17 (Release 17, R17) is a feasible method, which can save sidelink resources and improve resource utilization. However, it will introduce forward compatibility issues, that is, how to minimize the impact of the protocol version 18 (Release 18, R18) SL-Positioning UE on R16 or R17 UE, and how to avoid the R16, R17 resource allocation mechanism from being affected, and ensure that the R18 UE can work normally, etc. are all problems that need to be solved.

[0032] In addition, the existing sidelink communication does not introduce the SL-PRS reference signal, nor does it have a process design for related positioning interaction. If some existing reference signals 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 are followed to ensure forward compatibility and guarantee the transmission performance of SL-PRS while minimizing the impact on R16 and 17 UEs.

[0033] The channel sending or receiving 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.

[0034] In a first aspect, an embodiment of the present application provides a channel sending or receiving method, such as Figure 2 As shown, the method may include the following step 201:

[0035] 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.

[0036] 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.

[0037] 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 a foundation for realizing the through link positioning. Figure 3 shown.

[0038] 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.

[0039] 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.

[0040] 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 keep the same slot structure, either both carry SL-PRS or neither carry SL-PRS, mainly to keep the calculation results of the initial and retransmission transport blocks (Transport Block Size, TBS) consistent. That is, if SL-PRS is also sent when PSCCH and PSSCH are sent in the initial transmission, then PSCCH, PSSCH and SL-PRS are also sent during the retransmission; if SL-PRS is not sent when PSCCH and PSSCH are sent in the initial transmission, then PSCCH and PSSCH can be sent during the retransmission; in this way, the initial transmission and retransmission of the service data are not affected.

[0041] 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 initial transmission, so as to keep the TBS calculation results consistent with the initial and retransmissions.

[0042] 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, so as to keep the TBS calculation result consistent with the initial retransmission.

[0043] Optionally, in the above step 201, “sending or receiving the SL-PRS” includes the following step A1:

[0044] Step A1: According to the time domain configuration information of the SL-PRS, determine in the first resource a target time domain resource that can be used to send or receive the SL-PRS, 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 a time domain resource for sending or receiving the second-stage direct link control information (2 nd -stageSCI) time domain resources;

[0045] The SL-PRS is sent or received on the target time domain resource.

[0046] 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 nd -stage SCI resource mapping overlaps, so it can be mapped in the shared resource pool. nd-stage SCI, and then map SL-PRS.

[0047] 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.

[0048] Optionally, the time domain configuration information of the SL-PRS includes a symbol length N of the SL-PRS;

[0049] 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:

[0050] 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;

[0051] 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.

[0052] 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 the same as 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 transmitted through the shared resource pool, so as to avoid the transmission impact of the SL-PRS 2 nd -stageSCI and the sending and receiving of the first object.

[0053] 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.

[0054] Optionally, the first object includes a demodulation reference signal (Demodulation Reference Signal, DMRS) and / or a second object.

[0055] Among them, the second object may include at least one of PSCCH, phase tracking reference signal (Phase-trackingreference signal, PT-RS), channel state information reference signal (Channel State Information-Reference Signal, CSI-RS), and physical sidelink feedback channel (physical sidelink feedback channel, PSFCH).

[0056] Therefore, the first object includes at least one of DMRS, PSCCH, PT-RS, CSI-RS, and PSFCH.

[0057] That is, the symbols that can be used to send or receive SL-PRS refer to symbols that do not overlap with the symbols used to send or receive at least one of the following: 2 nd -stage SCI, DMRS, PSCCH, PT-RS, CSI-RS, PSFCH.

[0058] As can be seen from the above, in the embodiment of the present application, the resource mapping of SL-PRS is similar to 2 nd - There is no overlap in the resource mapping of at least one of the 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, avoiding affecting the resource allocation mechanism of R16 and 17 and ensuring that the R18 UE can work normally.

[0059] The above-mentioned resource overlap includes time domain and / or frequency domain resource overlap.

[0060] 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, which is described in the following method 1 or method 2.

[0061] 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:

[0062] 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;

[0063] 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;

[0064] 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;

[0065] 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.

[0066] As mentioned above, 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 a time domain resource used to send or receive the second-stage direct link control information. Therefore, the symbol at the end can refer to the last symbol in the first resource or the last symbol in the time unit.

[0067] In addition, the resource mapping of SL-PRS does not overlap with the resource mapping of DMRS, and therefore, it is necessary to map SL-PRS on the above-mentioned first resources except for the resources used to send or receive DMRS; and, when mapping SL-PRS, it is also required to be M consecutive symbols, and therefore, it is determined whether the above-mentioned target symbol exists in the above-mentioned target interval.

[0068] In addition, the reference symbol may be located after the second resource in the time unit of the shared resource pool (i.e., after mapping 2 nd -stage SCI), where x may be configured or preconfigured by a high-level parameter, or may be predefined by a protocol, such as being predefined as the first symbol after the second resource.

[0069] 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:

[0070] Step D1: Determine whether the target symbol exists in the first symbol interval;

[0071] Step D2: when the target symbol exists in the first symbol interval, determining the target symbol in the first symbol interval as the target time domain resource;

[0072] Step D3: when the target symbol does not exist in the first symbol interval, setting the value of Num to the index of the first DMRS;

[0073] Step D4: determining whether the DMRS with index Num is the last DMRS on the first resource;

[0074] Step D5: when the DMRS with index 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 index Num and the DMRS with index Num+k2 on the first resource; when the target symbol exists in the third symbol interval, determine the target symbol in the third symbol interval as the target time domain resource; when 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 index Num is the last DMRS on the first resource (i.e., step D4);

[0075] 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 when the target symbol exists in the second symbol interval, determining the first symbol in the second symbol interval as the target time domain resource;

[0076] Step D7: When the target symbol does not exist in the second symbol interval, determine that N is configured incorrectly.

[0077] Optionally, the value of k2 is 1.

[0078] 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;

[0079] If there is no target symbol between the reference symbol and the first DMRS, Num=1 is set 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 SL-PRS in the current time unit is completed;

[0080] 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.

[0081] 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.

[0082] In particular, the index of the DMRS is the corresponding index in the DMRS symbol set on the first resource. For example, if there are two DMRS on the current first resource, the indexes of the two DMRS columns are 1, 2 or 0, 1 respectively; if the DMRS index starts from 0, the initial value of Num should be equal to 0 instead of 1.

[0083] In order to facilitate understanding of the above method 1, the above method 1 is now explained in conjunction with the following implementation method 1:

[0084] Implementation method 1: SL-PRS time domain mapping method 1, including the following steps 1.1 to 1.3:

[0085] Step 1.1: Set up L ref Representation 2 nd -stage SCI mapping is completed after the reference symbol index (the reference point of the reference symbol index is the start symbol of the 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 the physical layer or indicated by SCI, L end_of_PSSCH Indicates the end symbol index of PSSCH, where the symbol index starts from 0.

[0086] The reference symbol can be 2 nd -stage SCI The xth symbol after the mapping is completed, x can be configured or preconfigured by high-level parameters, or predefined by the protocol; indicates L SL-PRS The SCI includes 1 st -stage SCI and 2 nd -stage SCI.

[0087] 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;

[0088] Step 1.3: If lref +L SL-PRS -1>L end_of_PSSCH , then L SL-PRS Configuration errors;

[0089] 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 re-execute step 1.2;

[0090] Step 1.5: If the above symbols do not overlap, then in the index interval [l ref , l ref +L SL-PRS -1]Map SL-PRS.

[0091] It should be noted that if L SL-PRS When configuring, it is already configured to satisfy l ref +L SL-PRS -1≤L end_of_PSSCH , then the above step 1.3 can be omitted.

[0092] 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 frequency domain resource mapping method of SL-PRS, the frequency domain resources used to send or receive SL-PRS can be mapped based on the frequency domain configuration information of SL-PRS.

[0093] Optionally, the first information indicates at least one of the following:

[0094] Identification information of the SL-PRS resource (i.e., SL-PRS Resource ID);

[0095] The symbol length N of the SL-PRS;

[0096] Frequency domain configuration information of the SL-PRS;

[0097] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0098] From this we can see that by 1 st -stage SCI and / or 2 nd -stage SCI indicates: at least one of SL-PRS ResourceID, SL-PRS symbol length N, and SL-PRS frequency domain configuration information, 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.

[0099] The SL-PRS frequency domain configuration information may include at least one of the following:

[0100] SL-PRS Resource ID, SL-PRS frequency domain pattern, comb offset.

[0101] 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. Among them, comb offset is REoffset, which indicates the comb offset configuration.

[0102] It should be noted that one 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 one SL-PRS resource is associated with at least one of the following characteristics:

[0103] SL-PRS Resource ID;

[0104] SL-PRS comb offset and the associated SL-PRS comb size;

[0105] SL-PRS starting symbol position and symbol length N;

[0106] SL-PRS frequency domain allocation;

[0107] Other time domain information.

[0108] 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.

[0109] Mode 2: Optionally, the time domain configuration information of the SL-PRS also includes the time domain starting symbol position of the SL-PRS; 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 E1:

[0110] Step E1: 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.

[0111] 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.

[0112] 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 to send or receive SL-PRS can be mapped based on the frequency domain configuration information of SL-PRS.

[0113] Optionally, the first information indicates at least one of the following:

[0114] Identification information of the SL-PRS resource;

[0115] The time domain starting symbol position of the SL-PRS;

[0116] The symbol length N of the SL-PRS;

[0117] Frequency domain configuration information of the SL-PRS;

[0118] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0119] From this we can see that by 1 st -stage SCI and / or 2 nd -stage SCI indicates at least one of: SL-PRS ResourceID, 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.

[0120] From the above, it can be seen that the time domain configuration information of SL-PRS includes at least one of the following:

[0121] SL-PRS Resource ID, starting symbol position, symbol length N.

[0122] Optionally, the time domain configuration information of the SL-PRS is associated with the pattern information of the DMRS.

[0123] 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 according to the association between the time domain configuration information of the SL-PRS and the DMRS pattern, and thus the time domain resources used to send or receive SL-PRS can be mapped according to the SL-PRS time domain configuration information corresponding to the currently used DMRS pattern.

[0124] 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 the SL-PRS may be mapped directly based on the SL-PRS time domain configuration information in the combination mode of the currently used DMRS pattern.

[0125] 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.

[0126] In combination with the following second and third implementation modes, 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 is explained below.

[0127] Implementation method 2: SL-PRS time domain mapping method 2, including the following steps 2.1 to 2.3:

[0128] Step 2.1: When different DMRS patterns are configured by higher-level parameters, one or more SL-PRS symbol length configuration sets that can be supported are configured or pre-configured by higher-level parameters;

[0129] Step 2.2: After determining the currently used DMRS pattern (i.e., selecting one from different DMRS patterns configured by high-level parameters), based on the number of SL-PRS symbols that can be supported under the currently used DMRS pattern, select a SL-PRS symbol number N from the SL-PRS symbol length configuration set;

[0130] Step 2.3: Based on the SL-PRS symbol number N selected in step 2.2, execute steps 1.1 to 1.3 of the first embodiment to perform SL-PRS time domain mapping.

[0131] Implementation method 3: SL-PRS time domain mapping method 3, which can be specifically described in steps 3.1 to 3.2 as follows:

[0132] Step 3.1 When the high-level 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;

[0133] Step 3.2: Perform time domain mapping of the SL-PRS according to the SL-PRS time domain configuration information.

[0134] 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 mode 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.

[0135] In addition, it should be noted that the frequency domain configuration information of the SL-PRS may also be associated with the DMRS pattern. In this case, the explanation of the mapping of the frequency domain resources of the SL-PRS is similar to that of the above-mentioned implementation modes 2 and 3, and will not be repeated here.

[0136] In addition, it should be noted that the time domain and / or frequency domain configuration information of 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.

[0137] Among them, for the SL-PRS time domain and / or frequency domain configuration information, when sending the 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, it can be st -stage SCI or 2 nd -stage SCI obtains SL-PRS time domain configuration information.

[0138] Optionally, the first overhead information of the SL-PRS is indicated by one of the following information:

[0139] The first stage direct link control information;

[0140] High-level parameters;

[0141] Preconfiguration information.

[0142] 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;

[0143] The mode information and the second information of the first overhead information are associated with the first overhead information;

[0144] 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.

[0145] It can be seen that through 1 st The specific case where the -stage SCI indicates the first overhead information of the SL-PRS may be described as in the following case 1 or case 2.

[0146] 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:

[0147] Table 1 SL-PRS overhead information indication method 1

[0148]

[0149] Table 2 SL-PRS overhead information indication method 2

[0150]

[0151] Case 2: As shown in Tables 3 and 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.

[0152] For example, as shown in Tables 3 and 4, 1 st The reserved bits in the -stage SCI can carry the SL-PRS overhead mode, and the overhead mode and the 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 the DMRS mode.

[0153] Table 3 SL-PRS overhead information indication method 3

[0154]

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

[0156]

[0157] Optionally, the method further comprises:

[0158] 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;

[0159] or,

[0160] 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;

[0161] or,

[0162] 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;

[0163] 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.

[0164] From the above steps F1 to F3, it can be seen that the above 1 st -stage SCI, high-level parameters, and the first overhead information of the SL-PRS indicated by one of the pre-configuration information are 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.

[0165] In addition, when receiving SL-PRS, 2 nd -stage SCI rate matching and PSSCH TBS calculation, the following should be noted:

[0166] (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":

[0167] 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 SL-PRS is received;

[0168] When the first overhead information is configured or pre-configured by a high-level parameter, the receiving device first receives the PSCCH and decodes 1 st -stage SCI 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.

[0169] 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.

[0170] (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":

[0171] The receiving device first receives the PSCCH and decodes 1 st -stage SCI, then calculate 2 nd -stage SCI second 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 target overhead information and the second rate matching, and the data in PSSCH is decoded and the SL-PRS is received.

[0172] (3) With respect to the above step F3: "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 and the first overhead information":

[0173] 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 transport block size of PSSCH is calculated according to the first rate matching and the first overhead information, and the data in PSSCH is decoded and the SL-PRS is received;

[0174] When the first overhead information is configured or pre-configured by a high-level parameter, the receiving device first receives the PSCCH and decodes 1 st -stage SCI 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 transport block size of PSSCH is calculated according to the first rate matching and the first overhead information, and the data in PSSCH is decoded and the SL-PRS is received.

[0175] 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 for PSSCH can be determined, which can then be used to determine 2 nd After mapping the number of REs of -stage SCI and the TBS of PSSCH, map PSCCH and PSCCHDMRS, map PSSCH DMRS, and then map 2nd-stage SCI, and then map SL-PRS.

[0176] The following are the following introductions to the above steps F1 to F3:

[0177] For step F1:

[0178] From step F1, it can be seen that according to 1 st -stage SCI indicates the first overhead information, calculation 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-configuration information nd -stage SCI first rate matching, and then calculate the TBS of PSSCH according to the first rate matching.

[0179] Optionally, in the above step F1, calculating the transport block size of the PSSCH according to the first rate matching includes:

[0180] 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;

[0181] or,

[0182] Step H2: Calculate the transport block size of the PSSCH according to the first rate matching and high-level parameter configuration or pre-configured SL-PRS overhead information.

[0183] From step H1, we can see that if 1 st -stage SCI, high-level parameters, and pre-configuration information indicate that the first overhead information is only used to calculate 2 nd -stage SCI first rate matching, then, according to the first rate matching, combined with 2 nd -The TBS of PSSCH is calculated 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.

[0184] From step H2, we can see that if 1 st -stage SCI, high-level parameters, and pre-configuration information indicate that the first overhead information is 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-level parameter configuration or other overhead information of the pre-configured SL-PRS.

[0185] For step F2:

[0186] From step F2, it can be seen that the existing rate matching calculation method (that is, 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 according to the second rate, and 1 st-stageSCI, high-level parameters, and first overhead information indicated by one of the pre-configuration information to calculate the TBS of the PSSCH; or, the existing rate matching calculation method can be used to calculate 2 nd -stage SCI second rate matching, thereby matching the second rate according to the second rate, and 2 nd -The second overhead information indicated by the stage SCI is used to calculate the TBS of the PSSCH.

[0187] For step F3:

[0188] From step F3, it can be seen that according to 1 st -stage SCI, high-level parameters, first overhead information indicated by one of the pre-configuration 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.

[0189] From the above steps F1 to F3, it can be seen that the embodiment of the present application provides a method for introducing SL-PRS into the shared resource pool. nd -stage SCI rate matching calculation method, and PSSCH TBS calculation method.

[0190] The following is a detailed introduction to the calculation method of the first rate matching, the second rate matching, and the TBS of the PSSCH in combination with the following implementation modes 4 to 6.

[0191] Implementation method 4: Calculation method of the first rate matching:

[0192] 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);

[0193] In addition, according to formula (1), 2 nd -stage SCI coded modulation symbol number Q′ SCI2 :

[0194]

[0195] Among them, O SCI2 Representation 2 nd -The number of bits of stage SCI.

[0196] L SCI2 Representation 2 nd-stage SCI’s 24bits CRC bits.

[0197] From 1 st -stage SCI directive.

[0198]

[0199] Indicates the number of subcarriers included in the PSSCH transmission bandwidth.

[0200] Indicates the number of PSCCH and PSCCH DMRS subcarriers associated with 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

[0201] (that is, sl-lengthSymbols minus 2), sl-lengthSymbols is a high-level parameter that indicates the number of sidelink symbols in the slot.

[0202] If the higher layer parameter physical direct link feedback channel period (sl-PSFCH-Period) = 2 or 4, 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

[0203] The value of can be determined by one of the following methods:

[0204] (1) Through SCI format 1-A (i.e. 1 st -stage SCI) in the SL-PRS overhead indication domain;

[0205] (2) Configured or preconfigured by high-level parameters;

[0206] (3) Preset a specific value based on the DMRS pattern.

[0207] Right now Indicates the above-mentioned first overhead information.

[0208] 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, the 2nd layer should be copied first.

[0209] R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A;

[0210] α is the high-level parameter scaling parameter (sl-Scaling) configuration.

[0211] Implementation method 5: Calculation method of second rate matching:

[0212] Among them, calculation 2 nd -stage SCI Rate matching, that is, calculation 2 nd -stage SCI coded modulation symbol number Q′ SCI2 ;

[0213] In addition, according to formula (1), 2 nd -stage SCI coded modulation symbol number Q′ SCI2 :

[0214]

[0215] Among them, O SCI2 Representation 2 nd -The number of bits of stage SCI.

[0216] L SCI2 Representation 2 nd -stage SCI’s 24bits CRC bits.

[0217] From 1 st -stage SCI directive.

[0218]

[0219] Indicates the number of subcarriers included in the PSSCH transmission bandwidth.

[0220] Indicates the number of PSCCH and PSCCH DMRS subcarriers associated with PSSCH on the lth OFDM symbol.

[0221] Indicates that on the OFDM symbol l transmitted by PSSCH, it can be used for 2 nd -stage SCI transfer RE number, where

[0222] sl-lengthSymbols is a high-level parameter that indicates the number of sidelink symbols in the slot.

[0223] 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

[0224] γ represents 2 nd -The number of unoccupied REs remaining in the RB where the last coded symbol of the stage SCI is located;

[0225] R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A;

[0226] α is the high-level parameter sl-Scaling configuration.

[0227] It should be noted that in the above-mentioned fourth and fifth embodiments, The calculation formula is different.

[0228] Implementation method 6: A method for calculating the TBS of the PSSCH without combining the overhead information of the SL-PRS includes the following steps 6.1 to 6.3:

[0229] Step 6.1: Calculate the total number of REs N′ allocated to PSSCH in a physical resource block (PRB) according to formula (2): RE :

[0230]

[0231] in, Indicates that one RB includes 12 subcarriers.

[0232] sl-LengthSymbols is a parameter provided by the higher layer and is used to indicate the number of sidelink symbols in the slot.

[0233] If the higher layer sl-PSFCH-Period = 2 or 4, 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

[0234] Indicates the overhead value indicated by the higher-layer parameter sidelink overhead information (sl-X-Overhead).

[0235] Determine according to the high-level parameter SL-shared channel DMRS time domain pattern list configuration information (sl-PSSCH-DMRS-TimePatternList) sl-PSSCH-DMRS-TimePatternList and Table 5:

[0236] Table 5 The value of

[0237]

[0238] Step 6.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0239]

[0240] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0241] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0242] Indicates that for 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth implementation method above) SCI2 ).

[0243] Step 7.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0244] 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:

[0245] Step 7.1: Calculate the total number of REs N′ allocated to PSSCH in a physical resource block (PRB) according to formula (4): RE :

[0246]

[0247] in, Indicates that one RB includes 12 subcarriers.

[0248] sl-LengthSymbols is a parameter provided by the higher layer and is used to indicate the number of sidelink symbols in the slot.

[0249] If the higher layer sl-PSFCH-Period = 2 or 4, 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

[0250] The value of can be determined by one of the following methods:

[0251] (1) Pass 1 st -stage SCI or 2 nd -The SL-PRS overhead indication field in the stage SCI or the SL-PRS time-domain symbol number information is determined;

[0252] (2) Configured or pre-configured by high-level parameters

[0253] (3) Preset specific values ​​based on DMRS pattern

[0254] Right now Indicates the overhead information of SL-PRS.

[0255] Indicates the overhead value indicated by the higher-layer parameter sl-X-Overhead.

[0256] Determined according to the high-level parameter sl-PSSCH-DMRS-TimePatternList and the above Table 5.

[0257] Step 7.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0258]

[0259] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0260] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0261] Indicates that for 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth implementation method above) SCI2 ).

[0262] Step 7.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0263] It should be noted that in the seventh and sixth embodiments, N′ is calculated RE The formula is different.

[0264] Embodiment 8: A second method for calculating the TBS of the PSSCH in combination with the overhead information of the SL-PRS includes the following steps 8.1 to 8.3:

[0265] Step 8.1: Calculate the total number of REs N′ allocated to PSSCH in the PRB according to formula (5): RE :

[0266]

[0267] in, Indicates that one RB includes 12 subcarriers;

[0268] sl-LengthSymbols is a parameter provided by the higher layer and is used to indicate the number of sidelink symbols in the slot.

[0269] If the higher layer sl-PSFCH-Period = 2 or 4, 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

[0270] The value of can be determined by one of the following methods:

[0271] (1) Pass 1 st -stage SCI or 2 nd -The SL-PRS overhead indication field in the stage SCI or the SL-PRS time-domain symbol number information is determined;

[0272] (2) Configured or pre-configured by high-level parameters

[0273] (3) Preset specific values ​​based on DMRS pattern

[0274] Right now Indicates the overhead information of SL-PRS.

[0275] Num_comb by 1 st -stage SCI or 2 nd -stage SCI indication, or configured or pre-configured by a higher layer parameter, indicates the comb size used by the SL-PRS; where comb_size ≥ 6, it is possible to support data and SL-PRS multiplexing in the same symbol;

[0276] It can be additionally limited that only when comb_size>=6, Num_comb=comb_size; otherwise, Num_comb=1;

[0277] Indicates the overhead value indicated by the higher-layer parameter sl-X-Overhead.

[0278] Determined according to the high-level parameter sl-PSSCH-DMRS-TimePatternList and the above Table 1.

[0279] Step 8.2: Calculate the total number of REs N allocated to PSSCH according to formula (3) RE :

[0280]

[0281] Among them, n PRB Indicates the total number of PRBs occupied by PSSCH;

[0282] Indicates the total number of REs occupied by PSCCH and PSCCH DMRS;

[0283] Indicates that for 2 nd -stage SCI transmission generates the number of coded modulation symbols Q′ SCI2 (i.e., Q′ calculated in the fourth or fifth implementation method above) SCI2 ).

[0284] That is, the calculation process of step 7.2 is the same as the calculation process of step 5.2 above.

[0285] Step 8.3: According to N RE and Q′ SCI2 , calculate the TBS of PSSCH.

[0286] It should also be noted that, in order to maintain backward compatibility, it is also possible to directly use the original 2 regardless of whether the transport block (i.e., sidelink transmission) contains SL-PRS and does not need to consider the SL-PRS overhead. nd -stageSCI rate matching calculation process (ie, the fifth embodiment above), and / or PSSCH TBS calculation process (ie, the sixth embodiment above).

[0287] Optionally, the symbol length N of the SL-PRS is configured according to at least one of the following:

[0288] The number of PSCCH symbols;

[0289] Number of PSSCH symbols;

[0290] DMRS model information;

[0291] Time-frequency configuration information of CSI-RS;

[0292] Time and frequency configuration information of PT-RS;

[0293] The number of symbols of the physical direct link feedback channel PSFCH.

[0294] Optionally, sending or receiving the SL-PRS includes:

[0295] In at least one of the following cases, the SL-PRS is received or sent:

[0296] The mode of the second-stage direct link control information is a preset mode;

[0297] The first-stage direct link control information indicates first overhead information of the SL-PRS;

[0298] The first-stage direct link control information indicates that the current transmission or reception includes the SL-PRS.

[0299] The above-mentioned preset mode may be, for example, a 2D mode.

[0300] It can be seen from this that if 2 nd -stage SCI mode is a preset mode (such as 2D mode), or 1 st -stageSCI indicates the first overhead information of SL-PRS, or, 1 st -stage SCI indicates that the current transmission includes SL-PRS, then the transmitting 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.

[0301] 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 -stage SCI rate matching and the process of calculating PSSCH TBS are the same.

[0302] It is understandable that the various embodiments described above in this application can be combined arbitrarily. The overall application process of the above embodiments is illustrated below as 9.1 to 9.5:

[0303] Step 9.1: Calculation 2 nd -stage SCI rate matching;

[0304] Among them, the scheme of the fourth or fifth implementation mode can be adopted to calculate 2 nd -stage SCI ratematching.

[0305] Step 9.2: Calculate the TBS of the PSSCH, so as to determine the number of bits of data carried by the PSSCH;

[0306] Among them, one of the above-mentioned implementation modes 6, 7, and 8 can be used to calculate the TBS of the PSSCH.

[0307] Step 9.3: Determine 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.

[0308] Step 9.4: Map SL-PRS;

[0309] Among them, the SL-PRS can be mapped using one of the methods in the above-mentioned implementation mode 1, implementation mode 2, and implementation mode 3.

[0310] Step 9.5: Map the data REs of PSSCH.

[0311] There is no mandatory requirement for the order of step 9.4 and step 9.5.

[0312] In summary, the embodiments of the present application solve the following problems:

[0313] (1) After introducing SL-PRS transmission into the shared resource pool, nd -stage SCI rate matching calculation problem, otherwise it will affect the encoding and decoding of 2nd-stage SCI;

[0314] (2) The TBS calculation problem of PSSCH after the introduction of SL-PRS transmission in the shared resource pool is solved. Otherwise, the TBS results calculated during retransmission merging will be different.

[0315] (3) A SL-PRS mapping rule is introduced in the shared resource pool to solve the problems of SL-PRS resource indication and compatibility.

[0316] 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 executing the channel sending or receiving method is taken as an example to illustrate the channel sending or receiving device provided in the embodiment of the present application.

[0317] In a second aspect, an embodiment of the present application provides a channel sending or receiving device, such as Figure 4 As shown, the channel sending or receiving device 400 includes the following modules:

[0318] The sending or receiving module 401 is used 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;

[0319] 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;

[0320] 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.

[0321] Optionally, the sending or receiving module 401 includes:

[0322] 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 the 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;

[0323] A sending or receiving submodule is used to send or receive the SL-PRS on the target time domain resource.

[0324] 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:

[0325] 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;

[0326] 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.

[0327] Optionally, the first object includes a demodulation reference signal DMRS and / or a second object.

[0328] Optionally, the resource mapping unit includes:

[0329] A first resource mapping subunit, 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;

[0330] 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;

[0331] 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;

[0332] 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.

[0333] Optionally, the first resource mapping subunit is specifically used to:

[0334] Determine whether the target symbol exists in the first symbol interval;

[0335] 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;

[0336] When the target symbol does not exist in the first symbol interval, setting the value of Num to the index of the first DMRS;

[0337] Determine whether the DMRS with index Num is the last DMRS on the first resource;

[0338] 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;

[0339] 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;

[0340] When the target symbol does not exist in the second symbol interval, it is determined that N is configured incorrectly.

[0341] 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:

[0342] The second resource mapping subunit is used 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.

[0343] Optionally, the time domain configuration information of the SL-PRS is associated with the mode information of the DMRS.

[0344] Optionally, the first information indicates at least one of the following:

[0345] Identification information of the SL-PRS resource;

[0346] The symbol length N of the SL-PRS;

[0347] Frequency domain configuration information of the SL-PRS;

[0348] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0349] Optionally, the first information indicates at least one of the following:

[0350] Identification information of the SL-PRS resource;

[0351] The time domain starting symbol position of the SL-PRS;

[0352] The symbol length N of the SL-PRS;

[0353] Frequency domain configuration information of the SL-PRS;

[0354] The first information includes the first-stage direct link control information and / or the second-stage direct link control information.

[0355] Optionally, the first overhead information of the SL-PRS is indicated by one of the following information:

[0356] The first stage direct link control information;

[0357] High-level parameters;

[0358] Preconfiguration information.

[0359] Optionally, the device further comprises:

[0360] A first 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;

[0361] or,

[0362] A second calculation module, configured to calculate a second rate matching of the second-stage direct link control information, and calculate a transport block size of the PSSCH according to the target overhead information and the second rate matching;

[0363] or,

[0364] 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;

[0365] 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.

[0366] Optionally, the first calculation module calculates the transport block size of the PSSCH according to the first rate matching, specifically for:

[0367] 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;

[0368] or,

[0369] 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.

[0370] 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;

[0371] The mode information and the second information of the first overhead information are associated with the first overhead information;

[0372] 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.

[0373] Optionally, the symbol length N of the SL-PRS is configured according to at least one of the following:

[0374] Number of PSCCH symbols

[0375] Number of PSSCH symbols

[0376] DMRS model information;

[0377] CSI-RS time-frequency configuration information

[0378] Time and frequency configuration information of PT-RS;

[0379] The number of symbols of the physical direct link feedback channel PSFCH.

[0380] Optionally, sending or receiving the SL-PRS includes:

[0381] In at least one of the following cases, the SL-PRS is received or sent:

[0382] The mode of the second-stage direct link control information is a preset mode;

[0383] The first-stage direct link control information indicates first overhead information of the SL-PRS;

[0384] 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 achieve Figures 2 to 3 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0385] like Figure 5As shown, the embodiment of the present application further provides a communication device 500, including a processor 501 and a memory 502, and 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.

[0386] 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, each process of the above-mentioned channel sending or receiving method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0387] 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.

[0388] 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.

[0389] 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.

[0390] 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.

[0391] 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.

[0392] 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.

[0393] 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 channel sending or receiving method, characterized in that: The method comprises: 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, characterized in that: 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, characterized in that 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, characterized in that The first object includes a demodulation reference signal DMRS and / or a second object.

5. The method according to claim 4, characterized in that 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, characterized in that 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, characterized in that: 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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 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.

15. The method according to any one of claims 3 to 7, characterized in that 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, characterized in that Sending or receiving 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, characterized in that: The device comprises: 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, characterized in that: The method comprises 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, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the channel sending or receiving method according to any one of claims 1 to 16 is implemented.

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