Channel transmission or reception method, and communication equipment

Abstract

This application discloses a channel transmission or reception method, apparatus and communication equipment, relating to the art of communications, wherein the channel transmission or reception method of an embodiment of this application includes the steps of transmitting or receiving a physical sidelink control channel PSCCH and a physical sidelink sharing channel PSSCH, or transmitting or receiving the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS, wherein the PSCCH is used to carry first-stage sidelink control information, the first-stage sidelink control information is used to schedule 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

[Technical Field]

[0001] [Cross-reference of related applications] This application claims priority to the Chinese patent application No. 202310836864.6, filed on 7 July 2023, all of which are incorporated herein by reference.

[0002] This application relates to the technical field of communications, and more specifically to channel transmission or reception methods, apparatus, and communication equipment. [Background technology]

[0003] With the rapid development of communication systems and terminal capabilities, numerous location-based service applications have emerged, and to meet the diverse needs for terminal positioning services, such as latency, accuracy, and security, new wireless sidelink positioning (NR-sidelink positioning) has appeared.

[0004] In NR-sidelink positioning, considering the need for relative positioning between terminals, i.e., sidelink positioning, it is necessary to introduce a sidelink-positioning reference signal (SL-PRS) transmitted between terminals. This allows terminals to complete the relative positioning process between terminals directly via sidelink, without relying on a base station.

[0005] While it is possible to introduce related SL-PRS transmission and reception into a shared resource pool, introducing new signal transmission into a shared resource pool requires modifying the corresponding channel configuration design. However, related technologies do not provide channel configurations that can be applied after SL-PRS has been introduced into a shared resource pool. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] Embodiments of the present invention provide a channel transmission or reception method, apparatus, and communication equipment that provide a channel configuration applicable after SL-PRS has been introduced into a shared resource pool. [Means for solving the problem]

[0007] According to the first embodiment, a channel transmission or reception method is provided, and the method is The steps include transmitting or receiving a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH, or transmitting or receiving the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS, The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSSCH, second-stage sidelink control information, and 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.

[0008] According to a second embodiment, a channel transmitting or receiving device is provided, and the device is Includes a transmit or receive module for transmitting or receiving the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, or for transmitting or receiving the PSCCH, the PSSCH and the sidelink position reference signal SL-PRS, The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSSCH, second-stage sidelink control information, and 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.

[0009] According to a third embodiment, a communication device is provided, which includes a processor and a memory, the memory storing a program or instruction executable by the processor, and when the program or instruction is executed by the processor, the steps of the method according to the first embodiment are realized.

[0010] According to a fourth aspect, a communication device is provided, the communication device including a processor and a communication interface, the communication interface being used to transmit or receive a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH, or to transmit or receive the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS. The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSSCH, second-stage sidelink control information, and 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.

[0011] According to the fifth aspect, a program or instruction is stored Non-volatile A readable storage medium is provided, and the program or instruction is executed by the processor, thereby realizing the steps of the method according to the first embodiment.

[0012] According to the sixth embodiment, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, and the processor implementing the method according to the first embodiment by executing a program or instructions.

[0013] According to the seventh aspect, a computer program / program product is provided, the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor, thereby realizing the steps of the method according to the first aspect. [Effects of the Invention]

[0014] In embodiments of the present application, a PSCCH and a PSSCH are transmitted or received, or a PSCCH, a PSSCH and an SL-PRS are transmitted or received, the PSCCH being used to carry first-stage sidelink control information, the first-stage sidelink control information being used to schedule at least one of the PSSCH, second-stage sidelink control information, and SL-PRS, the PSSCH carrying data and second-stage sidelink control information, the second-stage sidelink control information being used for decoding the PSSCH and / or scheduling the SL-PRS. Embodiments of the present application are found to provide a novel channel configuration applicable after the introduction of SL-PRS into a shared resource pool, laying the foundation for realizing sidelink positioning. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of the channel configuration in related technologies. [Figure 2] This is a flowchart of a channel transmission or reception method according to an embodiment of the present invention. [Figure 3] This is a schematic diagram of the channel configuration according to the embodiment of the present application. [Figure 4] This is a block diagram of a channel transmission or reception device according to an embodiment of the present invention. [Figure 5] This is a block diagram of a communication device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0016] The following describes the technical means in the embodiments of the present application with reference to the drawings of the embodiments. It is clear that the embodiments described are only a selection of embodiments of the present application, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application are all within the scope of protection of the present application.

[0017] The terms "first," "second," etc., used in this application are for distinguishing similar objects and are not intended to describe a specific order or sequence. It should be understood that these terms are interchangeable where appropriate, so that the embodiments of this application can be carried out in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc., are generally of the same kind and do not limit the number of objects; for example, the first object may be one or more. Also, "or" in this application indicates at least one of the connected objects. For example, "A or B" includes three forms: form 1: includes A and does not include B; form 2: includes B and does not include A; and form 3: includes both A and B. The character " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship. The technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but are also 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 this application are often used interchangeably, and the technologies described are used not only in the systems and wireless technologies mentioned above, but also in other systems and wireless technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the term NR is used for most of the following description, but these technologies are sixth generation (6 thIt can also be applied to systems other than NR systems, such as Generation 6G communication systems.

[0018] First, in order to facilitate understanding of the channel transmission or reception method in the embodiment of this application, the following will be explained.

[0019] In related technologies, as shown in Figure 1, in a shared resource pool, the Physical sidelink control channel (PSCCH) and the Physical sidelink shared channel (PSSCH) use a time division multiplexing (TDM) + frequency division multiplexing (FDM) method, and the second stage sidelink control information (2 nd -stage SCI) is introduced, and the remaining data is transported by PSSCH, and the first stage side link control information (1 st -stage SCI) indicates information such as the time-frequency resource location, priority, period, and corresponding modulation and coding scheme (MCS) carried by PSCCH and occupied by the current transport block.

[0020] To implement SL-Positioning technology, sending SL-PRS using a resource pool compatible with protocol version 16 (Release 16, R16) or protocol version 17 (Release 17, R17) is a feasible method, as it can conserve sidelink resources and improve resource utilization. However, backward compatibility issues arise, namely, how to minimize the impact of protocol version 18 (Release 18, R18) SL-Positioning UE on R16 or R17 UE, how to avoid affecting the resource allocation mechanisms of R16 and R17, and how to ensure that the R18 UE functions correctly. These are issues that need to be resolved.

[0021] In addition, the sidelink communication in related technologies does not introduce a reference signal called SL-PRS, nor does it have a process design related to positioning interaction. If some reference signals in related technologies are repurposed as SL-PRS, there are problems with accuracy and flexibility, and the power spectral density (PSD) is also affected by multiplexing with other signals. In the embodiment of this application, by introducing a new SL-PRS transmission and mapping mechanism, the original design rules of the -stage SCI are maintained as much as possible, forward compatibility is ensured, and thereby the transmission performance of SL-PRS is guaranteed while minimizing the impact on R16 and 17UE.

[0022] The channel transmission or reception method according to the embodiment of this application will be described in detail below with reference to the drawings, using several embodiments and their application scenarios.

[0023] According to the first aspect, an embodiment of the present application provides a channel transmission or reception method, as shown in Figure 2, the method is Step 201 may include transmitting or receiving a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH, or transmitting or receiving the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS. The PSCCH is used to carry first-stage sidelink control information, the first-stage sidelink control information is used to schedule at least one of the PSSCH, second-stage sidelink control information, and 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.

[0024] The embodiment of this application provides a novel channel configuration applicable after the introduction of SL-PRS into a shared resource pool, laying the foundation for achieving side-link positioning. Exemplary, the channel configuration is shown in Figure 3.

[0025] In other words, the embodiment of the present application provides a new channel configuration after introducing SL-PRS into a shared resource pool, in which transmitting equipment can transmit PSCCH and PSSCH, or PSCCH, PSSCH and SL-PRS, and receiving equipment can receive PSCCH and PSSCH, or PSCCH, PSSCH and SL-PRS.

[0026] As can be seen from this, after introducing SL-PRS into the shared resource pool, SL-PRS can be sent together with PSCCH and PSSCH, and in this way, SL-PRS can be received together with PSCCH and PSSCH.

[0027] Furthermore, when transmitting or receiving SL-PRS in a shared resource pool, an additional restriction is imposed that the initial transmission and retransmission must maintain the same slot structure; that is, both must either carry SL-PRS or neither must carry SL-PRS, primarily to maintain consistency in the calculation results of the initial and retransmission transport block (TBS). In other words, if SL-PRS is transmitted simultaneously when PSCCH and PSSCH are transmitted in the initial transmission, then PSCCH, PSSCH, and SL-PRS should also be transmitted in the retransmission. Conversely, if SL-PRS is not transmitted when PSCCH and PSSCH are transmitted in the initial transmission, then PSCCH and PSSCH should be transmitted in the retransmission. In this way, it does not affect the merging of the initial and retransmission of service data.

[0028] Alternatively, if SL-PRS is transmitted simultaneously with PSCCH and PSSCH during the initial transmission, and SL-PRS is not transmitted during retransmission, it becomes necessary to carry the overhead information for SL-PRS, and this overhead information matches the overhead information from the initial transmission, thereby maintaining consistency in the calculation results of the initial and retransmission TBS.

[0029] Alternatively, if only PSCCH and PSSCH are transmitted during the initial transmission, and SL-PRS is carried during retransmission, then the overhead information for SL-PRS must be carried, and this overhead information matches the overhead information from the initial transmission, thereby maintaining consistency in the calculation results of the initial and retransmission TBS.

[0030] Preferably, the step of "transmitting or receiving the SL-PRS" in step 201 above includes the following step A1.

[0031] In step A1, based on the SL-PRS time domain setting information, a target time domain resource available for transmitting or receiving the SL-PRS is determined from the first resource, the first resource being a time domain resource located after the second resource in the time unit of the shared resource pool, and the second resource being second-stage side link control information (2 nd -stage SCI) is a time-domain resource used for sending or receiving, The SL-PRS is transmitted or received in the target time-domain resource.

[0032] 2 nd -stage SCI can be used to schedule SL-PRS, i.e., 2 nd -Stage SCI can carry SL-PRS scheduling information, so SL-PRS resource mapping is 2 nd -Stage SCI resource mapping cannot overlap, and 2 shared resource pools nd - After mapping the stage SCI, you need to map the SL-PRS.

[0033] In addition, the above time unit may be a single slot, or a time period consisting of m consecutive symbols in a single slot, where m is an integer greater than 0.

[0034] Preferably, the time domain setting information of the SL-PRS includes the symbol length N of the SL-PRS. Step A1, described above as "determining a target time domain resource available for transmitting or receiving the SL-PRS from the first resource based on the time domain setting information of the SL-PRS," includes the following step B1.

[0035] In step B1, M consecutive symbols that do not overlap with the third resource are determined from the first resource, and the target time domain resource is obtained. The third resource is a resource used to transmit or receive a first object, the value of M is N or N + k1, and N and k1 are integers greater than 0 respectively.

[0036] In an embodiment of the present application, the first object is an existing object transmitted or received by a resource in a shared resource pool (excluding 2 nd -stage SCI). After introducing SL-PRS into the shared resource pool, the resource mapping of SL-PRS does not overlap with the resource mapping of 2 nd -stage SCI, and the resource mapping of SL-PRS does not overlap with the resource mapping of other objects (i.e., the first object) transmitted by the resources in the shared resource pool. Therefore, the transmission of SL-PRS is avoided from affecting the transmission and reception of 2 nd -stage SCI and the first object.

[0037] In addition, when M = N + k1, k1 symbols are used to process Automatic Gain Control (AGC) and / or Gap. The value of k1 may be a positive integer greater than or equal to 1.

[0038] Preferably, the first object includes a Demodulation Reference Signal (DMRS) and / or a second object.

[0039] The second object may include at least one of PSCCH, a Phase-tracking reference signal (PT-RS), a Channel State Information-Reference Signal (CSI-RS), and a physical sidelink feedback channel (PSFCH).

[0040] Therefore, the first object includes at least one of DMRS, PSCCH, PT-RS, CSI-RS, and PSFCH.

[0041] The symbols that can be used to transmit or receive SL-PRS are: 2 nd -stage refers to a symbol that does not overlap with the symbols used to transmit or receive at least one of the following: SCI, DMRS, PSCCH, PT-RS, CSI-RS, or PSFCH.

[0042] As can be seen from the above, in the embodiment of this application, the resource mapping of SL-PRS is 2 nd -stage SCI, DMRS, PSCCH, PT-RS, CSI-RS, PSFCH do not overlap with at least one resource mapping, thus minimizing the impact of the R18 sidelink positioning UE on the R16 or R17 UE, i.e., avoiding impact on the resource allocation mechanisms of R16 and R17, and ensuring that the R18 UE operates correctly.

[0043] The above resource overlaps include time-domain and / or frequency-domain resource overlaps.

[0044] In the following, we will specifically describe the implementation method for determining M consecutive symbols from the first resource that do not overlap with the third resource, as described in step B1 above, and acquiring the target time-domain resource, as Method 1 or Method 2.

[0045] Method 1: Preferably, step B1, which involves "determining M consecutive symbols from the first resource that do not overlap with the third resource, and obtaining the target time-domain resource," includes the following step C1.

[0046] In step C1, the target symbol is determined in the target symbol interval of the first resource, and the target symbol is determined as the target time-domain resource. The target symbol interval includes a first symbol interval, a symbol interval between two DMRSs in the first resource with indices differing by k2, and a second symbol interval, wherein the first symbol interval is the symbol interval between a reference symbol in the first resource and a symbol for transmitting or receiving the first DMRS, and the second symbol interval is the symbol interval between a symbol for transmitting or receiving the last DMRS in the first resource and the last symbol in the first resource, where k2 is a pre-set step size. The first DMRS is located in the first resource after the reference symbol in the time domain and is closest to the reference symbol. DMRS And, The target symbols are M consecutive symbols that do not overlap with the resources for sending or receiving the second object, or the target symbols are M consecutive symbols.

[0047] As described 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 for transmitting or receiving second-stage sidelink control information. Therefore, the last symbol mentioned above may be the last symbol in the first resource, or it may be the last symbol in the time unit.

[0048] In addition, since the resource mapping for SL-PRS and the resource mapping for DMRS do not overlap, it is necessary to map SL-PRS to a resource other than the resource for transmitting or receiving DMRS in the first resource, and since M consecutive symbols are required when mapping SL-PRS, it is determined whether or not the target symbol exists in the target interval.

[0049] Furthermore, the above reference symbol is after the second resource in the time unit of the shared resource pool (i.e., 2 nd-stage SCI may be the xth symbol located after the SCI has been mapped, where x may be set or pre-configured by a higher-layer parameter or pre-defined by a protocol, for example, pre-defined as the first symbol after the second resource.

[0050] Preferably, step C1, which involves "determining a target symbol in the target symbol interval of the first resource and determining the target symbol as the target time-domain resource," Step D1 is to determine whether the target symbol exists in the first symbol interval, If the target symbol exists in the first symbol interval, step D2 determines the target symbol in the first symbol interval as the target time-domain resource, If the target symbol does not exist in the first symbol interval, step D3 sets the value of Num as the index of the first DMRS, Step D4 determines whether the DMRS having the Num index is the last DMRS in the first resource, If the DMRS with index Num is not the last DMRS in the first resource, determine whether the target symbol exists in a third symbol interval between the DMRS with index Num in the first resource and the DMRS with index Num+k2. 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 increase by k2 to its current value, and return to step D5, which determines whether the DMRS with index Num is the last DMRS in the first resource (i.e., step D4). Step D6: If the DMRS having the index Num is the last DMRS in the first resource, determine whether the target symbol exists in the second symbol interval, and if the target symbol exists in the second symbol interval, determine the first symbol in the second symbol interval as the target time-domain resource. The process includes step D7, which determines that N has been incorrectly set if the target symbol is not present in the second symbol interval.

[0051] Preferably, the value of k2 is 1.

[0052] For example, if k2=1 and there are two DMRSs in the first resource, when determining the target symbol in the above target symbol interval, first, it is determined whether a target symbol exists between the reference symbol and the first DMRS. If a target symbol exists between the reference symbol and the first DMRS, the resource mapping for the current time unit of SL-PRS is completed. If no target symbol exists between the reference symbol and the first DMRS, set Num=1, determine whether a target symbol exists between the DMRS with the Num index and the DMRS with the Num+1 index, and if a target symbol exists between the DMRS with the Num index and the DMRS with the Num+1 index, complete the resource mapping for the SL-PRS in the current time unit. If no target symbol exists between the DMRS with index Num and the DMRS with index Num+1, determine whether a target symbol exists between the DMRS in the last column and the last symbol of the first resource. If a target symbol exists between the DMRS in the last column and the last symbol of the first resource, complete the resource mapping for the SL-PRS in the current time unit. If no target symbol exists between the second DMRS and the last symbol of the first resource, the symbol length N of the SL-PRS is incorrectly set.

[0053] In particular, the DMRS index is the corresponding index in the DMRS symbol set in the first resource. For example, if there are two DMRS on the current first resource, the DMRS indexes for these two columns are 1, 2, or 0, 1, respectively. If the DMRS index starts from 0, the initial value of Num should be set to 0, not 1.

[0054] To facilitate understanding of Method 1 described above, Method 1 will be explained by combining it with the following Example 1.

[0055] Example 1: SL-PRS time-domain mapping method 1 includes the following steps 1.1 to 1.3.

[0056] In Step 1.1, L ref ga 2 nd -stage SCI indicates the index of the reference symbol after mapping is complete (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 This indicates the number of SL-PRS symbols determined by the upper layer parameters, physical layer, or SCI instruction, L end_of_PSSCH This is set to indicate the last symbol index of PSSCH, and symbol indices start from 0.

[0057] The reference symbol is 2 nd -stage SCI may be the xth symbol after the mapping is complete, where x may be set or pre-set by upper layer parameters or pre-defined by the protocol, L SL-PRS The SCI that instructs is 1 st -stage SCI and 2 nd -Includes at least one of the stage SCIs.

[0058] In step 1.2, the symbol index interval [l ref , l ref +L SL-PRS-1] determines whether it overlaps with at least one of the following symbols: DMRS symbol, PT-RS symbol, CSI-RS symbol, PSCCH, or PSFCH. In step 1.3, l ref +L SL-PRS -1>L end_of_PSSCH If so, L SL-PRS It was set incorrectly, In step 1.4, if there is a duplicate of the above symbol, l ref Set this to the index value corresponding to the last symbol in the duplicate symbols, and repeat step 1.2. In step 1.5, if the above symbols do not overlap, the index interval [l ref , l ref +L SL-PRS Map SL-PRS to -1].

[0059] Note L SL-PRS When setting l ref +L SL-PRS -1≦L end_of_PSSCH If the conditions are already met, step 1.3 above can be omitted.

[0060] The above method 1 is a method for mapping time-domain resources of SL-PRS. Based on the frequency-domain setting information of SL-PRS, frequency-domain resources for transmitting or receiving SL-PRS can be mapped to the frequency-domain resource mapping method of SL-PRS.

[0061] Preferably, the first information is The identification information of the SL-PRS resource (i.e., SL-PRS Resource ID), The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The first information includes the first-stage side link control information and / or the second-stage side link control information.

[0062] As you will see from this, 1 st -stage SCI and / or 2 nd -stage SCI can specify at least one of the following: SL-PRS Resource ID, SL-PRS symbol length N, and SL-PRS frequency domain setting information, thereby enabling the mapping of time domain resources and frequency domain resources for transmitting or receiving SL-PRS using the above method 1 based on this information.

[0063] SL-PRS frequency domain setting information is: It may include at least one of the following: SL-PRS Resource ID, SL-PRS frequency domain pattern, or comb offset.

[0064] Here, if the REoffset setting is a parameter based on resource pool settings or pre-configurations, 1 st -stage SCI and / or 2 nd -stage does not require specifying the parameter. comb offset is REoffset and indicates the comb offset setting.

[0065] Note that one SL-PRS resource refers to the time-frequency resource used for SL-PRS transmission within one unit of time (e.g., time slot) in the dedicated positioning resource pool, and one SL-PRS resource is, SL-PRS Resource ID, SL-PRS comb offset and related SL-PRS comb size, SL-PRS start symbol position and symbol length N, SL-PRS frequency domain allocation, and It is associated with at least one characteristic of other time-domain information.

[0066] In other words, in a dedicated positioning resource pool, one SL-PRS resource in one slot may be identified by a unique SL-PRS resource ID.

[0067] Method 2: Preferably, the time domain setting information of the SL-PRS further includes the time domain start symbol position of the SL-PRS, and step B1, "determine M consecutive symbols from the first resource that do not overlap with the third resource, and obtain the target time domain resource," includes the following step E1.

[0068] In step E1, based on the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, M consecutive symbols are determined from the first resource, and the target time domain resource is acquired.

[0069] As can be seen from this, if the time-domain start symbol position and symbol length N of the SL-PRS are known, then M consecutive symbols for transmitting or receiving the SL-PRS can be mapped in the first resource.

[0070] The above method 2 is a method for mapping time-domain resources of SL-PRS. Based on the frequency-domain setting information of SL-PRS, frequency-domain resources for transmitting or receiving SL-PRS can be mapped to the frequency-domain resource mapping method of SL-PRS.

[0071] Preferably, the first information is The identification information of the SL-PRS resource, The time domain start symbol position of the SL-PRS, The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The first information includes the first-stage side link control information and / or the second-stage side link control information.

[0072] As you will see from this, 1 st -stage SCI and / or 2 nd -stage SCI can specify at least one of the following: SL-PRS Resource ID, SL-PRS time-domain start symbol position, SL-PRS symbol length N, and SL-PRS frequency-domain setting information. Based on this information, time-domain and frequency-domain resources for transmitting or receiving SL-PRS can be mapped using the above method 2.

[0073] As can be seen from the above, the time domain setting information for SL-PRS is It includes at least one of the following: SL-PRS Resource ID, starting symbol position, and symbol length N.

[0074] Preferably, a relationship exists between the time domain setting information of the SL-PRS and the pattern information of the DMRS.

[0075] Higher-level parameters allow you to set or pre-configure the currently used DMRS pattern. This enables you to determine the SL-PRS time-domain configuration information corresponding to the currently used DMRS pattern based on the relationship between the SL-PRS time-domain configuration information and the DMRS pattern, and then map time-domain resources for transmitting or receiving SL-PRS based on the SL-PRS time-domain configuration information corresponding to the currently used DMRS pattern.

[0076] Alternatively, a combination mode of DMRS pattern and SL-PRS time domain setting information may be set, and in this way, the time domain resources for transmitting or receiving SL-PRS can be directly mapped based on the SL-PRS time domain setting information in the combination mode to which the currently used DMRS pattern belongs.

[0077] The specific method for mapping time domain resources for transmitting or receiving SL-PRS based on the determined SL-PRS time domain setting information may be either Method 1 or Method 2 described above.

[0078] Referring to Examples 2 and 3 below, a method for mapping SL-PRS time-domain resources when a relationship exists between SL-PRS time-domain setting information and DMRS pattern will be described.

[0079] Example 2: SL-PRS time-domain mapping method 2 includes the following steps 2.1 to 2.3.

[0080] In step 2.1, when setting different DMRS patterns using higher-level parameters, one or more supported SL-PRS symbol length setting sets are set or pre-set by the higher-level parameters. In step 2.2, after determining the DMRS pattern currently in use (i.e., selecting one from the different DMRS patterns set by the higher-level parameters), a single SL-PRS symbol count N is selected from the SL-PRS symbol length setting set based on the number of SL-PRS symbols that can be supported by the currently in use DMRS pattern. In step 2.3, based on the number of SL-PRS symbols N selected in step 2.2, steps 1.1 to 1.3 of the above embodiment 1 are performed to perform SL-PRS time-domain mapping.

[0081] Example 3: SL-PRS time-domain mapping method 3 specifically includes the following steps 3.1 to 3.2.

[0082] In step 3.1, when setting different DMRS patterns and corresponding SL-PRS time-domain configuration information for upper-layer parameters, the physical layer determines the corresponding SL-PRS time-domain configuration information based on the selected DMRS pattern. In step 3.2, SL-PRS time domain mapping is performed based on the SL-PRS time domain setting information.

[0083] If the SL-PRS time domain setting information includes the symbol length N of the SL-PRS, steps 1.1 to 1.3 of Embodiment 1 can be performed to perform SL-PRS time domain mapping. If the SL-PRS time domain setting information includes the symbol length N of the SL-PRS and the time domain start symbol position of the SL-PRS, time domain resource mapping of the SL-PRS can be performed according to Embodiment 2.

[0084] The frequency domain setting information for SL-PRS may also be associated with the DMRS pattern. In this case, the explanation regarding the mapping of SL-PRS frequency domain resources is similar to that of Examples 2 and 3 above, and therefore will be omitted here.

[0085] The time-domain and / or frequency-domain setting information for SL-PRS may be set directly or pre-set by higher-layer parameters, pre-set by a protocol, or determined based on DMRS pattern information.

[0086] Regarding SL-PRS time domain and / or frequency domain setting information, when transmitting SL-PRS, the SL-PRS time domain setting information is set or pre-set by the upper layer parameters, 1 st -stage SCI or 2 nd - Enter into stage SCI and when receiving SL-PRS, 1 st -stage SCI or 2 nd -Stage SCI allows you to obtain SL-PRS time domain setting information.

[0087] Preferably, the first overhead information of the SL-PRS is The first stage side link control information, Upper layer parameters, and It is determined by one of the pre-configuration pieces of information.

[0088] Preferably, the first stage side link control information instructs the display of the first overhead information, or the first stage side link control information includes pattern information of the first overhead information. A relationship exists between the pattern information and second information of the first overhead information and the first overhead information. The second information includes at least one of the following: DMRS pattern information, PSCCH symbol count, PSSCH symbol count, phase tracking reference signal PT-RS time-frequency setting information, and channel state information reference signal CSI-RS time-frequency setting information.

[0089] As you will see from this, 1 st -The specific cases in which the first overhead information of SL-PRS is indicated by stage SCI are as follows: Case 1 or Case 2 below.

[0090] Case 1: As shown in Tables 1 and 2, the overhead information for SL-PRS is 1 st -Explicitly indicated by reserved bits in the stage SCI.

[0091] [Table 1]

[0092] [Table 2]

[0093] Case 2: As shown in Tables 3 and 4, 1 st -The reserved bits in the stage SCI implicitly indicate the overhead information of the SL-PRS, i.e., 1 st-The reserved bits in the stage SCI implicitly indicate the SL-PRS overhead pattern, which, in combination with at least one of the following pieces of information—DMRS pattern information, PSCCH symbol count, PSSCH symbol count, PT-RS time-frequency setting information, and CSI-RS time-frequency setting information—determines the final SL-PRS overhead.

[0094] That is, for example, as shown in Tables 3 and 4, 1 st -If the reserved bits in the stage SCI include the overhead pattern of SL-PRS, and there is a relationship between the overhead pattern and DMRS pattern and the specific SL-PRS overhead information, then the specific overhead information of SL-PRS can be determined based on the overhead pattern and DMRS pattern of SL-PRS.

[0095] [Table 3]

[0096] [Table 4]

[0097] Preferably, the method is Step F1: Calculate the first rate matching of the second stage sidelink control information based on the first overhead information, and calculate the transport block size of the PSSCH based on the first rate matching. Or, Step F2 involves calculating a second rate matching of the second stage sidelink control information and calculating the transport block size of the PSSCH based on the target overhead information and the second rate matching. Or, The step F3 further includes calculating a first rate matching of the second stage sidelink control information based on the first overhead information, and calculating the transport block size of the PSSCH based on the first rate matching and the first overhead information, The target overhead information is either 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 sidelink control information.

[0098] As can be seen from the above steps F1 to F3, st -The first overhead information of SL-PRS, indicated by one of the following: stage SCI, upper layer parameters, or preconfiguration information, is 2 nd - Used to calculate the rate matching of the stage SCI and / or the transport block size (TBS) of the PSSCH, or the above 2 nd -The second overhead information of the SL-PRS, as indicated by the stage SCI, is used to calculate the TBS of the PSSCH.

[0099] Also, when receiving SL-PRS, 2 nd The following points should be noted regarding rate matching for stage SCI and TBS calculation for PSSCH.

[0100] (1) Regarding step F1 described above, which involves "calculating a first rate matching of the second stage sidelink control information based on the first overhead information and calculating the transport block size of the PSSCH based on the first rate matching", The first overhead information is 1 st -If instructed by stage SCI, the receiving equipment first receives PSCCH, 1 st -Decode the stage SCI to determine the first overhead information, and then, based on the first overhead information, 2nd - Calculate the first rate matching of the -stage SCI, and then the 2 in PSSCH nd - After determining the mapping status of the stage SCI, 2 nd -Decode the stage SCI, then calculate the TBS of the PSSCH based on the first rate matching, decode the data in the PSSCH and receive the SL-PRS, If the first overhead information is set or pre-set by the upper layer parameters, the receiving device first receives the PSCCH and 1 st -Decode the stage SCI, and then, based on the first overhead information, 2 nd - Calculate the first rate matching of the -stage SCI, and then the 2 in PSSCH nd - After determining the mapping status of the stage SCI, 2 nd -The SCI is decoded, then the TBS of the PSSCH is calculated based on the first rate matching, and data decoding and SL-PRS reception are performed in the PSSCH.

[0101] Here, the process for calculating the TBS of PSSCH based on the first rate matching is specifically as described in step H1 or H2 below.

[0102] (2) Regarding step F2 described above, which involves "calculating a second rate matching of the second stage side link control information and calculating the transport block size of the PSSCH based on the target overhead information and the second rate matching", The receiving device first receives PSCCH, and 1 st -Decode the stage SCI, then 2 nd - Calculate the second rate matching of the stage SCI, and then the 2 in PSSCH nd - After determining the mapping status of the stage SCI, 2 nd-The SCI is decoded, then the TBS of the PSSCH is calculated based on the target overhead information and second rate matching, and data decoding and SL-PRS reception are performed in the PSSCH.

[0103] (3) Regarding step F3 described above, which involves "calculating the first rate matching of the second stage sidelink control information based on the first overhead information, and calculating the transport block size of the PSSCH based on the first rate matching and the first overhead information", The first overhead information is 1 st -If instructed by stage SCI, the receiving equipment first receives PSCCH, 1 st -Decode the stage SCI to determine the first overhead information, and then, 2 nd - Calculate the first rate matching of the -stage SCI, and then the 2 in PSSCH nd - After determining the mapping status of the stage SCI, 2 nd -The stage SCI is decoded, then the transport block size of the PSSCH is calculated based on the first rate matching and first overhead information, and data decoding and SL-PRS reception are performed in the PSSCH. If the first overhead information is set or pre-set by the upper layer parameters, the receiving device first receives the PSCCH and 1 st -Decode the stage SCI, and then, based on the first overhead information, 2 nd - Calculate the first rate matching of the -stage SCI, and then the 2 in PSSCH nd - After determining the mapping status of the stage SCI, 2 nd -The SCI is decoded, then the transport block size of the PSSCH is calculated based on the first rate matching and first overhead information, and data decoding and SL-PRS reception are performed in the PSSCH.

[0104] In the scene where SL-PRS is transmitted, the transmitting device first has two nd - We calculate the rate matching for the stage SCI, then calculate the TBS for the PSSCH, which allows us to determine the total number of available REs for the PSSCH, and furthermore, 2 nd - After determining the number of mapping REs for stage SCI and the TBS for PSSCH, we map PSCCH and PSCCH DMRS in combination with the specific DMRS pattern, then map PSSCH DMRS, and then 2 nd -Stage SCI can be mapped, and then SL-PRS can be mapped.

[0105] The following explains each of the steps F1 to F3 mentioned above.

[0106] Regarding Step F1, As can be seen from step F1, 1 st - Based on the first overhead information indicated by the stage SCI, 2 nd -The first rate matching of the stage SCI can be calculated, and further, the TBS of the PSSCH can be calculated based on the first rate matching, or, based on the first overhead information set by the upper layer parameters or preconfiguration information, 2 nd -The first rate matching of the stage SCI can be calculated, and further, the TBS of the PSSCH can be calculated based on the first rate matching.

[0107] Preferably, step F1 involves calculating the transport block size of the PSSCH based on the first rate matching, Step H1, which calculates the transport block size of the PSSCH based on the first rate matching and at least one of the second overhead information, the time-domain setting information of the SL-PRS, and the frequency-domain setting information of the SL-PRS. Or, Step H2 includes calculating the transport block size of the PSSCH based on the first rate matching and upper layer parameter setting or the overhead information of the SL-PRS set in advance.

[0108] As can be seen from step H1, st when the first overhead information indicated by one of the 1-stage SCI, upper layer parameters, and pre-configuration information is only used to calculate the first rate matching of the 1-stage SCI, based on the first rate matching, nd the transport block size (TBS) of the PSSCH can be calculated by combining at least one of the second overhead information indicated by the 1-stage SCI, the time domain setting information of the SL-PRS, and the frequency domain setting information of the SL-PRS. nd

[0109] As can be seen from step H2, st when the first overhead information indicated by one of the 1-stage SCI, upper layer parameters, and pre-configuration information is only used to calculate the first rate matching of the 1-stage SCI, based on the first rate matching, the TBS of the PSSCH can be calculated by combining with other overhead information of the SL-PRS set or pre-set by the upper layer parameters. nd

[0110] Regarding step F2, As can be seen from step F2, using the rate matching calculation method in the related technology (that is, the method not combined with the SL-PRS overhead information), nd calculate the second rate matching of the 1-stage SCI, and thereby, based on the second rate matching and the first overhead information indicated by one of the 1-stage SCI, upper layer parameters, and pre-configuration information, the TBS of the PSSCH may be calculated, or using the rate matching calculation method in the related technology, st ​nd Calculate the second rate matching of the 1-stage SCI, and based on this, and the second overhead information indicated by the 2 nd -stage SCI, the TBS of the PSSCH may be calculated.

[0111] Regarding step F3, As can be seen from step F3, 1 st -stage SCI, upper layer parameters, and based on the first overhead information indicated by one of the pre-configuration information, 2 nd Calculate the first rate matching of the -stage SCI, and further, based on the first rate matching and the first overhead information, the TBS of the PSSCH can be calculated.

[0112] As can be seen from steps F1 to F3 above, the embodiments of the present application provide a method for calculating the rate matching of the 2 nd -stage SCI and a method for calculating the TBS of the PSSCH after introducing the SL-PRS into the shared resource pool.

[0113] Referring to the following Examples 4 to 6, a calculation method for calculating the first rate matching, the second rate matching, and the TBS of the PSSCH will be specifically described.

[0114] Example 4: The calculation method of the above first rate matching 2 nd Calculating the Rate matching of the 2 nd -stage SCI is to calculate the number of modulated symbols Q' after encoding of the 2 SCI2 (that is, the number of occupied REs), and In addition, according to formula (1), the number of modulated symbols Q' after encoding of the 2 nd -stage SCI SCI2 can be calculated.

Equation

[0115] L SCI2 is, 2 nd - Indicates the 24-bit CRC bits of the stage SCI.

[0116] TIFF2026522989000084.tif18166 is 1 st -stage SCI is used to indicate this.

[0117]

number

[0118] TIFF2026522989000086.tif17166 shows the number of subcarriers included in the PSSCH transmission bandwidth.

[0119] TIFF2026522989000087.tif16166 shows the number of PSCCH and PSCCH DMRS subcarriers related to PSSCH in the l-th Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0120] TIFF2026522989000088.tif18166 is an OFDM symbol l for PSSCH transmission, 2 nd - Indicates the number of resource elements (RE) available for stage SCI transmission.

number

number

[0121] If the upper layer parameter physical sidelink feedback channel period (sl-PSFCH-Period) = 2 or 4, then if the PSFCH overhead indication field in SCI format 1-A (i.e., format 1-A of the 1st-stage SCI) indicates "1",

number

number

number

number

[0122] The value of TIFF2026522989000095.tif18166 may be determined by one of the following methods:

[0123] (1) SCI format 1-A (i.e., 1 st Determined by the SL-PRS overhead indication field in stage SCI, (2) Set or pre-set by upper-level parameters, (3) Pre-set specific values ​​based on the DMRS pattern.

[0124] In other words, TIFF2026522989000096.tif17166 shows the above first overhead information.

[0125] γ is 2nd -stage SCI indicates the number of remaining unused REs in the resource block (RB) to which the last encoded symbol belongs, and note that 2 in TBS nd - When calculating rate matching for stage SCI, assume γ=0, 2 nd -When a stage SCI is mapped to two layers, the copy must be performed to the second layer first.

[0126] R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A. α is set by the scaling parameter (sl-Scaling), which is a higher-level parameter.

[0127] Example 5: Calculation method for the second rate matching 2 nd - Calculating the rate matching for stage SCI is 2 nd - Stage SCI: Number of modulation symbols Q' after encoding SCI2 This involves calculating, In addition, according to equation (1), 2 nd - Stage SCI: Number of modulation symbols Q' after encoding SCI2 It is possible to calculate this.

number

[0128] L SCI2 is, 2 nd - Indicates the 24-bit CRC bits of the stage SCI.

[0129] TIFF2026522989000098.tif17166 is 1 st -stage SCI is used to indicate this.

[0130]

number

[0131] TIFF2026522989000100.tif17166 shows the number of subcarriers included in the PSSCH transmission bandwidth.

[0132] TIFF2026522989000101.tif16166 shows the number of PSCCH and PSCCH DMRS subcarriers associated with PSSCH in the l-th OFDM symbol.

[0133] TIFF2026522989000102.tif18166 is an OFDM symbol l for PSSCH transmission, 2 nd - Indicates the number of REs available for stage SCI transmission.

number

number

[0134] If the upper layer parameter sl-PSFCH-Period=2 or 4, then if the PSFCH overhead indication field in SCI format 1-A indicates "1",

number

number

number

number

[0135] γ is 2 nd -stage SCI indicates the number of remaining unoccupied REs in the RB to which the last coded symbol belongs. R represents the coding rate indicated by the "Modulation and coding scheme" information field in SCI format 1-A. α is set by the upper layer parameter sl-Scaling.

[0136] In addition, in Examples 4 and 5 above, The calculation formula for TIFF2026522989000109.tif18166 is different.

[0137] Example 6: A calculation method for calculating the TBS of PSSCH without combining it with SL-PRS overhead information includes the following steps 6.1 to 6.3.

[0138] In step 6.1, based on equation (2), the total number of REs N' assigned to PSSCH in the Physical Resource Block (PRB) is calculated. RE Calculate,

number

number

number

[0139] If the upper layer parameter sl-PSFCH-Period=2 or 4, then if the PSFCH overhead indication field in SCI format 1-A indicates "1",

number

number

number

number

[0140] TIFF2026522989000117.tif17166 shows the overhead value indicated by the upper-level parameter sidelink overhead information (sl-X-Overhead).

[0141] TIFF2026522989000118.tif16166 is determined by the upper layer parameter SL - Shared Channel DMRS Time Domain Pattern List setting information (sl-PSSCH-DMRS-TimePatternList) and Table 5.

[0142] [Table 5]

[0143] In step 6.2, based on equation (3), the total number of REs N assigned to PSSCH is calculated. RE Calculate,

number

[0144] In step 7.3, N RE and Q' SCI2 Based on this, calculate the TBS of PSSCH.

[0145] Example 7: Calculation method 1 for calculating the TBS of PSSCH in combination with the overhead information of SL-PRS includes the following steps 7.1 to 7.3.

[0146] In step 7.1, based on equation (4), the total number of REs N' assigned to PSSCH in the Physical Resource Block (PRB) is calculated. RE Calculate,

number

number

number

[0147] If the upper layer parameter sl-PSFCH-Period = 2 or 4, when the PSFCH overhead indication field in SCI format 1-A indicates "1",

Number

Number

Number

Number

[0148] The value of TIFF2026522989000130.tif20166 may be determined by one of the following methods.

[0149] (1) 1 st -stage SCI or 2 nd -stage SCI according to the SL-PRS overhead indication field or the number of SL-PRS time domain symbol information, (2) Set or pre-set by the upper layer parameter, (3) Preset a predetermined value based on the DMRS pattern.

[0150] That is, TIFF2026522989000131.tif17166 shows the overhead information of SL-PRS.

[0151] TIFF2026522989000132.tif16166 shows the overhead value indicated by the upper layer parameter sl-X-Overhead.

[0152] TIFF2026522989000133.tif18166 is determined based on the upper layer parameters sl-PSSCH-DMRS-TimePatternList and Table 5 above.

[0153] In step 7.2, based on Equation (3), the total number N of all REs assigned to PSSCH RE is calculated,

Number

[0154] In step 7.3, based on N RE and Q' SCI2 , the TBS of PSSCH is calculated.

[0155] Note that in Example 7 and Example 6, the equations for calculating N' RE are different.

[0156] Example 8: Calculation method 2 for calculating the TBS of PSSCH in combination with the overhead information of SL-PRS includes the following steps 8.1 to 8.3.

[0157] In step 8.1, based on formula (5), the total number N' of REs assigned to PSSCH in a PRB RE is calculated.

Number

Number

Number

[0158] If the upper layer parameter sl-PSFCH-Period = 2 or 4 and the PSFCH overhead indication field in SCI format 1-A indicates "1",

Number

Number

Number

Number

[0159]

[0160] The value of TIFF2026522989000144.tif18166 may be determined by one of the following methods:

[0160] (1)1 st -stage SCI or 2 nd - Determined by the SL-PRS overhead indication field or SL-PRS time-domain symbol count information in the stage SCI, (2) Set or pre-set by upper-level parameters, (3) Pre-set predetermined values ​​based on the DMRS pattern.

[0161] In other words, TIFF2026522989000145.tif17166 shows the overhead information for the SL-PRS.

[0162] Num_comb is 1 st -stage SCI or 2 nd -stage SCI indicates, or is set or pre-configured by higher-level parameters, and indicates the comb size used by SL-PRS. If comb_size ≥ 6, it may support multiplexing of data and SL-PRS within the same symbol. It may be possible to restrict Num_comb=comb_size only when comb_size≧6, otherwise Num_comb=1. TIFF2026522989000146.tif16166 shows the overhead value indicated by the upper layer parameter sl-X-Overhead.

[0163] TIFF2026522989000147.tif16166 is determined based on the upper layer parameter sl-PSSCH-DMRS-TimePatternList and Table 1 above.

[0164] In step 8.2, based on equation (3), the total number of REs N assigned to PSSCH is calculated.RE Calculate,

number

[0165] In other words, the calculation process in step 7.2 is the same as the calculation process in step 5.2 above.

[0166] In step 8.3, N RE and Q' SCI2 Based on this, calculate the TBS of PSSCH.

[0167] Furthermore, in order to maintain backward compatibility, regardless of whether SL-PRS is included in the transport block (i.e., sidelink transmission), there is no need to consider the overhead issue of SL-PRS, and the original 2 nd -The rate matching calculation process for stage SCI (i.e., Example 5 above) and / or the TBS calculation process for PSSCH (i.e., Example 6 above) may be used as is.

[0168] Preferably, the symbol length N of the SL-PRS is Number of symbols in PSCCH, Number of symbols in PSSCH, DMRS model information, CSI-RS time frequency setting information, PT-RS time frequency setting information, and It is set based on at least one of the number of symbols in the physical side-link feedback channel (PSFCH).

[0169] Preferably, the step of transmitting or receiving the SL-PRS is: If the mode of the second stage side link control information is preset mode, When the first stage side link control information indicates the first overhead information of the SL-PRS, The step includes receiving or transmitting the SL-PRS under at least one of the following conditions: the first-stage sidelink control information indicates that the current transmission or reception includes the SL-PRS.

[0170] The preset mode mentioned above may be, for example, 2D mode.

[0171] As you will see from this, 2 nd -stage SCI mode is preset mode (e.g., 2D mode), or 1 st -stage SCI indicates the first overhead information of SL-PRS, or 1 st -stage SCI instructs that the current transmission should include SL-PRS, then the transmitting equipment transmits SL-PRS, and 2 nd -stage SCI mode is preset mode (e.g., 2D mode), or 1 st -stage SCI indicates the first overhead information of SL-PRS, or 1 st -If the stage SCI indicates that the current transmission includes SL-PRS, the receiving equipment receives SL-PRS.

[0172] As described below, in the embodiments of the present application, the SL-PRS transmitting device and the SL-PRS receiving device perform SL-PRS time-domain resource mapping, 2 nd -The process of calculating rate matching for stage SCI and the calculation of PSSCH TBS are both the same.

[0173] To ensure understanding, the embodiments described herein can be combined in any way, and the overall application procedure of the embodiments described above will be explained below with examples, as shown in sections 9.1 to 9.5 below.

[0174] In step 9.1, 2 nd - Calculate the rate matching of the stage SCI, Using the solution in Example 4 or Example 5 described above, 2 nd -The ratematching of the stage SCI can be calculated.

[0175] In step 9.2, the TBS of the PSSCH is calculated, which allows us to determine the number of bits of data carried by the PSSCH. You may calculate the TBS of PSSCH using one of the above examples 6, 7, or 8.

[0176] In step 9.3, 2 nd - After determining the number of mapping REs for stage SCI and the TBS for PSSCH, we map PSCCH and PSCCH DMRS in combination with the specific DMRS pattern, then map PSSCH DMRS, and then 2 nd -Mapping stage SCI.

[0177] Step 9.4 involves mapping the SL-PRS. SL-PRS may be mapped using one of the methods described in Example 1, Example 2, or Example 3 above.

[0178] In step 9.5, we map the data RE of the PSSCH.

[0179] There is no requirement regarding the order in which steps 9.4 and 9.5 are performed.

[0180] As described below, the embodiments of the present application solve the following problems.

[0181] (1) After introducing SL-PRS transmission to the shared resource pool, 2 nd -Solves the problem of rate matching calculation for stage SCI, otherwise 2 nd -stage SCI affects encoding and decoding, (2) After introducing SL-PRS transmission to the shared resource pool, the problem of TBS calculation in PSSCH is resolved, otherwise the problem of different TBS calculation results occurs when retransmission mergers occur. (3) Introduce SL-PRS mapping rules to the shared resource pool to resolve issues such as SL-PRS resource instruction and compatibility.

[0182] The channel transmission or reception method according to the embodiment of the present application may be performed by a channel transmission or reception device. In the embodiment of the present application, the channel transmission or reception device according to the embodiment of the present application will be described as an example in which the channel transmission or reception device performs the channel transmission or reception method.

[0183] According to a second aspect, an embodiment of the present application provides a channel transmitting or receiving device, and as shown in Figure 4, the channel transmitting or receiving device 400 is Includes a transmit or receive module 401 for transmitting or receiving a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH, or for transmitting or receiving the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS, The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSSCH, second-stage sidelink control information, and 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.

[0184] Preferably, the transmitting or receiving module 401 is A resource mapping submodule that determines a target time domain resource available for transmission or reception of SL-PRS from a first resource based on SL-PRS time domain setting information, 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 used for transmission or reception of second-stage sidelink control information. The system includes a transmit or receive submodule that transmits or receives the SL-PRS in the target time-domain resource.

[0185] Preferably, the time domain setting information of the SL-PRS includes the symbol length N of the SL-PRS, and the resource mapping submodule is The system includes a resource mapping unit that determines M consecutive symbols from the first resource that do not overlap with the third resource, and acquires the target time domain resource. The third resource is a resource used to send or receive the first object, where the value of M is N or N+k1, and N and k1 are integers greater than 0.

[0186] Preferably, the first object includes a demodulation reference signal DMRS and / or a second object.

[0187] Preferably, the resource mapping unit is It includes a first resource mapping subunit that determines a target symbol in the target symbol interval of the first resource and determines the target symbol as the target time domain resource, The target symbol interval includes a first symbol interval, a symbol interval between two DMRSs in the first resource that differ by k2 indices, and a second symbol interval, wherein the first symbol interval is the symbol interval between a reference symbol in the first resource and a symbol for transmitting or receiving the first DMRS, and the second symbol interval is the symbol interval between a symbol for transmitting or receiving the last DMRS in the first resource and the last symbol in the first resource, where k2 is a pre-set step size. The first DMRS is located in the first resource after the reference symbol in the time domain and is closest to the reference symbol. DMRS And, The target symbols are M consecutive symbols that do not overlap with the resources for sending or receiving the second object, or the target symbols are M consecutive symbols.

[0188] Preferably, the first resource mapping subunit is, specifically, Determine whether the target symbol exists in the first symbol interval, If the target symbol exists in the first symbol interval, the target symbol in the first symbol interval is determined to be the target time-domain resource. If the target symbol does not exist in the first symbol interval, the value of Num is set as the index of the first DMRS. Determine whether the DMRS with the Num index is the last DMRS in the first resource. If the DMRS with the index Num is not the last DMRS in the first resource, determine whether the target symbol exists in the third symbol interval between the DMRS with the index Num in the first resource and the DMRS with the index Num+k2. 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 increase its current value by k2, and return to the step of determining whether the DMRS with the index Num is the last DMRS in the first resource. If the DMRS having the index Num is the last DMRS in the first resource, determine whether the target symbol exists in the second symbol interval, and if the target symbol exists in the second symbol interval, determine the first symbol in the second symbol interval as the target time-domain resource. If the target symbol does not exist in the second symbol interval, it is determined that N has been set incorrectly.

[0189] Preferably, the SL-PRS time domain setting information further includes the SL-PRS time domain start symbol position, and the resource mapping unit, The system includes a second resource mapping subunit that determines M consecutive symbols from the first resource based on the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, and acquires the target time-domain resource.

[0190] Preferably, a relationship exists between the time domain setting information of the SL-PRS and the pattern information of the DMRS.

[0191] Preferably, the first information is The identification information of the SL-PRS resource, The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The first information includes the first-stage side link control information and / or the second-stage side link control information.

[0192] Preferably, the first information is The identification information of the SL-PRS resource, The time domain start symbol position of the SL-PRS, The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The first information includes the first-stage side link control information and / or the second-stage side link control information.

[0193] Preferably, the first overhead information of the SL-PRS is The first stage side link control information, Upper layer parameters, and It is determined by one of the pre-configuration pieces of information.

[0194] Preferably, the apparatus is A first calculation module that calculates a first rate matching of the second stage sidelink control information based on the first overhead information and calculates the transport block size of the PSSCH based on the first rate matching. Or, A second calculation module that calculates a second rate matching of the second stage sidelink control information and calculates the transport block size of the PSSCH based on the target overhead information and the second rate matching. Or, The system further includes a third calculation module that calculates a first rate matching of the second stage sidelink control information based on the first overhead information, and calculates the transport block size of the PSSCH based on the first rate matching and the first overhead information. The target overhead information is either 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 sidelink control information.

[0195] Preferably, the first calculation module calculates the transport block size of the PSSCH based on the first rate matching, specifically, Based on the first rate matching and at least one of the second overhead information, the time-domain setting information of the SL-PRS, and the frequency-domain setting information of the SL-PRS, the transport block size of the PSSCH is calculated. Or, The transport block size of the PSSCH is calculated based on the overhead information of the SL-PRS, which is set or pre-set by the first rate matching and upper layer parameters.

[0196] Preferably, the first stage side link control information instructs the display of the first overhead information, or the first stage side link control information includes pattern information of the first overhead information. A relationship exists between the pattern information and second information of the first overhead information and the first overhead information. The second information includes at least one of the following: DMRS pattern information, PSCCH symbol count, PSSCH symbol count, phase tracking reference signal PT-RS time-frequency setting information, and channel state information reference signal CSI-RS time-frequency setting information.

[0197] Preferably, the symbol length N of the SL-PRS is Number of symbols in PSCCH, Number of symbols in PSSCH, DMRS model information, CSI-RS time frequency setting information, PT-RS time frequency setting information, and It is set based on at least one of the number of symbols in the physical side-link feedback channel (PSFCH).

[0198] Preferably, the step of transmitting or receiving the SL-PRS is: If the mode of the second stage side link control information is preset mode, When the first stage side link control information indicates the first overhead information of the SL-PRS, The step includes receiving or transmitting the SL-PRS under at least one of the following conditions: the first-stage sidelink control information indicates that the current transmission or reception includes the SL-PRS. The channel transmission or reception device according to the embodiment of the present application can implement each process realized in the embodiment of the method shown in Figures 2 and 3 and achieve the same technical effects, and to avoid duplication, the description is omitted here.

[0199] As shown in Figure 5, the embodiment of the present invention further provides a communication device 500 including a processor 501 and a memory 502, the memory 502 storing a program or instruction executable by the processor 501, for example, if the communication device 500 is a terminal, the program or instruction executed by the processor 501 can realize each step in the embodiment of the channel transmission or reception method and achieve the same technical effect. If the communication device 500 is a network-side device, the program or instruction executed by the processor 501 can realize each step in the embodiment of the channel transmission or reception method and achieve the same technical effect, and to avoid redundancy, the explanation is omitted here.

[0200] The embodiments of this application are as follows: Non-volatile Further providing a readable storage medium, Non-volatileA program or instruction is stored in a readable storage medium, and when the program or instruction is executed by the processor, each process in the above-described embodiment of the channel transmission or reception method is realized, and the same technical effect can be achieved. To avoid duplication, the explanation is omitted here.

[0201] The processor is the processor in the terminal in the above embodiment. The readable storage medium includes computer-readable storage media such as computer read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. In some examples, the readable storage medium may be a non-temporarily readable storage medium.

[0202] Embodiments of the present invention further provide a chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor can implement each process in the embodiment of the channel transmission or reception method described above by executing a program or instructions, and achieve the same technical effects, which are omitted here to avoid duplication.

[0203] It should be understood that the chips referred to in the embodiments of this application may also be called system-level chips, system chips, chip systems, or system-on-a-chip.

[0204] Embodiments of the present application further provide a computer program / program product which is stored in a storage medium and executed by at least one processor, thereby realizing each process in the embodiment of the channel transmission or reception method described above and achieving the same technical effects, which are omitted here to avoid duplication.

[0205] In this specification, the terms “includes,” “incorporates,” or any other variation thereof, to cover non-exclusive inclusion, mean that a process, method, article, or apparatus containing a set of elements includes not only those elements but also other elements not explicitly mentioned, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase “includes one…” does not preclude the existence of another identical element in a process, method, article, or apparatus containing that element. Furthermore, the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order illustrated or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the function; for example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Also, features described by reference to one example may be combined in another example.

[0206] As described in the embodiments below, those skilled in the art will see that the methods according to the embodiments may be implemented by combining a computer software product with a necessary general-purpose hardware platform, or of course, by hardware alone. The computer software product is stored in a storage medium (e.g., ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions that cause a terminal or network-side device to execute the methods according to each embodiment of the present application.

[0207] Although embodiments of the present application have been described above with reference to the drawings, the present application is not limited to the above-described specific embodiments. The above-described specific embodiments are merely illustrative and not limiting. Many forms that a person skilled in the art could make based on the suggestions of the present application without departing from the spirit of the present application and the scope of protection of the claims are all within the scope of protection of the present application.

Claims

1. A channel transmission or reception method, The steps include transmitting or receiving a physical sidelink control channel PSCCH and a physical sidelink shared channel PSSCH, or transmitting or receiving the PSCCH, the PSSCH and a sidelink position reference signal SL-PRS, The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSCCH, second-stage sidelink control information, and SL-PRS. A channel transmission or reception method wherein 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.

2. The step of transmitting or receiving the SL-PRS is: A step of determining a target time domain resource available for transmission or reception of SL-PRS from a first resource based on SL-PRS time domain setting information, 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 used for transmission or reception of second-stage sidelink control information. The method according to claim 1, comprising the step of transmitting or receiving the SL-PRS in the target time domain resource.

3. The time domain setting information of the SL-PRS includes the symbol length N of the SL-PRS. The step of determining a target time domain resource available for transmission or reception of the SL-PRS from the first resource, based on the time domain setting information of the SL-PRS, is: The process includes the steps of determining M consecutive symbols from the first resource that do not overlap with the third resource, and obtaining the target time domain resource, The method according to claim 2, wherein the third resource is a resource used to send or receive a first object, and the value of M is N or N + k1, where N and k1 are integers greater than 0.

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

5. The step of determining M consecutive symbols from the first resource that do not overlap with the third resource, and obtaining the target time domain resource, is: The process includes the steps of determining a target symbol in the target symbol interval of the first resource and determining the target symbol as the target time-domain resource, The target symbol interval includes a first symbol interval, a symbol interval between two DMRSs in the first resource whose indices differ by k2, and a second symbol interval, wherein the first symbol interval is the symbol interval between a reference symbol in the first resource and a symbol for transmitting or receiving the first DMRS, and the second symbol interval is the symbol interval between a symbol for transmitting or receiving the last DMRS in the first resource and the last symbol in the first resource, where k2 is a pre-set step size. The first DMRS is the DRMS ​​in the first resource that is located after the reference symbol in the time domain and is closest to the reference symbol. The method according to claim 4, wherein the target symbols are M consecutive symbols that do not overlap with the resources for transmitting or receiving the second object, or the target symbols are M consecutive symbols.

6. The steps of determining a target symbol in the target symbol interval of the first resource and determining the target symbol as the target time-domain resource are: A step of determining whether the target symbol exists in the first symbol interval, If the target symbol exists in the first symbol interval, the step of determining the target symbol in the first symbol interval as the target time-domain resource, If the target symbol does not exist in the first symbol interval, the step of setting the value of Num as the index of the first DMRS, A step of determining whether the DMRS having an index of Num is the last DMRS in the first resource, If the DMRS having the index of Num is not the last DMRS in the first resource, determine whether the target symbol exists in a third symbol interval between the DMRS having the index of Num in the first resource and the DMRS having the index of Num + k2; 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 increase by k2 to its current value, and return to the step of determining whether the DMRS having the index of Num is the last DMRS in the first resource. If the DMRS having the Num index is the last DMRS in the first resource, determine whether the target symbol exists in the second symbol interval, and if the target symbol exists in the second symbol interval, determine the first symbol in the second symbol interval as the target time-domain resource. The method according to claim 5, comprising the step of determining that N has been incorrectly set if the target symbol is not present in the second symbol interval.

7. The time domain setting information of the SL-PRS further includes the time domain start symbol position of the SL-PRS, The step of determining M consecutive symbols from the first resource that do not overlap with the third resource by mapping, and obtaining the target time-domain resource, is: The method according to claim 3 or 4, comprising the step of determining M consecutive symbols from the first resource based on the starting symbol position of the SL-PRS and the symbol length N of the SL-PRS, and acquiring the target time-domain resource.

8. The method according to any one of claims 2 to 7, wherein a relationship exists between the time domain setting information of the SL-PRS and the pattern information of the DMRS.

9. The first piece of information is, The identification information of the SL-PRS resource, The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The method according to any one of claims 3 to 6, wherein the first information includes the first stage side link control information and / or the second stage side link control information.

10. The first piece of information is, The identification information of the SL-PRS resource, The time domain start symbol position of the SL-PRS, The symbol length N of the SL-PRS, and This indicates at least one of the frequency domain setting information for the SL-PRS, The method according to claim 7, wherein the first information includes the first-stage side link control information and / or the second-stage side link control information.

11. The first overhead information of the SL-PRS is, The first stage side link control information, Upper layer parameters, and The method according to any one of claims 1 to 10, as indicated by one of the preconfiguration pieces of information.

12. A step of calculating a first rate matching of the second stage sidelink control information based on the first overhead information, and calculating the transport block size of the PSSCH based on the first rate matching, Or, A step of calculating a second rate matching of the second stage sidelink control information, and calculating the transport block size of the PSSCH based on the target overhead information and the second rate matching, Or, The process further includes the steps of calculating a first rate matching of the second stage sidelink control information based on the first overhead information, and calculating the transport block size of the PSSCH based on the first rate matching and the first overhead information, The method according to claim 11, wherein 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 instructed by the second stage side link control information.

13. The step of calculating the transport block size of the PSSCH based on the first rate matching is: A step of calculating the transport block size of the PSSCH based on the first rate matching and at least one of the second overhead information, the time domain setting information of the SL-PRS, and the frequency domain setting information of the SL-PRS. Or, The method according to claim 12, comprising the step of calculating the transport block size of the PSSCH based on the overhead information of the SL-PRS set or pre-set by the first rate matching and upper layer parameters.

14. The first stage side link control information instructs the display of the first overhead information, or the first stage side link control information includes pattern information of the first overhead information. A relationship exists between the pattern information and second information of the first overhead information and the first overhead information. The method according to any one of claims 11 to 13, wherein the second information includes at least one of DMRS pattern information, the number of symbols of PSCCH, the number of symbols of PSSCH, time-frequency setting information of the phase-tracking reference signal PT-RS, and time-frequency setting information of the channel state information reference signal CSI-RS.

15. The symbol length N of the SL-PRS is Number of symbols in PSCCH, Number of symbols in PSSCH, DMRS model information, CSI-RS time frequency setting information, PT-RS time frequency setting information, and The method according to any one of claims 3 to 7, which is set based on at least one of the number of symbols of a physical sidelink feedback channel PSFCH.

16. The step of transmitting or receiving the SL-PRS is: If the mode of the second-stage side link control information is preset mode, When the first stage side link control information indicates the first overhead information of the SL-PRS, The method according to any one of claims 1 to 15, comprising the step of receiving or transmitting the SL-PRS under at least one of the following conditions: the first-stage sidelink control information indicates that the current transmission or reception includes the SL-PRS.

17. A channel transmitting or receiving device, Includes a transmit or receive module for transmitting or receiving the physical sidelink control channel PSCCH and the physical sidelink shared channel PSSCH, or for transmitting or receiving the PSCCH, the PSSCH and the sidelink position reference signal SL-PRS, The PSCCH is used to transport first-stage sidelink control information, and the first-stage sidelink control information is used to schedule at least one of the PSCCH, second-stage sidelink control information, and SL-PRS. A channel transmitter or receiver, wherein 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.

18. A communication device including a processor and memory, wherein the memory stores a program or instruction that can be executed by the processor, and when the program or instruction is executed by the processor, the steps of the channel transmission or reception method described in any one of claims 1 to 16 are realized.

19. A readable storage medium in which a program or instruction is stored, wherein when the program or instruction is executed by a processor, the channel transmission or reception method according to any one of claims 1 to 16 is realized.

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