Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method comprising: a first communication device obtaining an identifier of a first resource, the first resource being used for transmitting a reference signal, such as a sidelink positioning reference signal, the identifier of the first resource is determined according to at least one of the following items: the length of a time domain resource capable of being used for transmitting the sidelink positioning reference signal, the initial position of the time domain resource for transmitting the sidelink positioning reference signal, and the length of the time domain resource for transmitting the sidelink positioning reference signal; the first communication device transmits a sidelink positioning reference signal using a first resource. On the basis, a uniform generation mode of the sidelink positioning reference signal resource identifier can be designed, so that flexible indication of the sidelink positioning reference signal resource can be realized.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a communication method and a communication device. Background Art

[0002] In daily life and applications, location information has become increasingly important basic information. Navigation services, location based services (LBS) and other applications all need to provide users with corresponding services based on their location information.

[0003] The global navigation satellite system (GNSS) is currently a commonly used solution for determining location information. The positioning accuracy of GNSS may not meet the needs of some applications with higher accuracy requirements.

[0004] To solve this problem, the industry has proposed using sidelink positioning technology, but how to determine the resources used to transmit the sidelink positioning reference signal is a problem that the industry is concerned about. Summary of the invention

[0005] The present application provides a communication method and a communication device, which can realize flexible indication of resources of a sidelink positioning reference signal.

[0006] In a first aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or can be a component of a communication device (such as a chip or a circuit), which is not limited to this. For ease of description, the following is an example of the method being performed by a first communication device.

[0007] The method may include: a first communication device obtains an identifier of a first resource, the first resource is used to transmit a sidelink positioning reference signal, the identifier of the first resource is determined based on at least one of the following: the length of the time domain resources that can be used to transmit the sidelink positioning reference signal, the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal; the first communication device uses the first resource to send the sidelink positioning reference signal.

[0008] Based on the above technical solution, the first communication device can obtain the identifier of the first resource, and then determine the first resource according to the identifier of the first resource, and then use the first resource to send a reference signal. Among them, the identifier of the first resource can be determined according to one or more of the length of the time domain resource that can be used to transmit the reference signal, the starting position of the time domain resource used to transmit the reference signal, and the length of the time domain resource used to transmit the reference signal. In this way, for example, an association can be established between the identifier of the resource used to transmit the reference signal and the length of the starting position of the resource, or a relationship can be established between the identifier of the resource used to transmit the reference signal and the length of the time domain resource that can be used to transmit the reference signal, so that the resource of the reference signal can be determined and indicated, and the flexible implementation of the reference signal resource can be realized. In addition, this method can be applicable to various communication scenarios.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the first communication device obtains the identifier of the first resource, including: the first communication device receives first indication information, and the first indication information indicates the identifier of the first resource; or, the first communication device itself determines the identifier of the first resource.

[0010] Based on the above technical solution, the first communication device can receive the identifier of the first resource from other devices, or can determine the identifier of the first resource by itself, and the method is flexible.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the length of the time domain resources that can be used to transmit the sidelink positioning reference signal is determined based on at least one of the following: the length of the time domain resources used to transmit the physical sidelink shared channel PSSCH, the length of the time domain resources used to transmit the physical sidelink control channel PSCCH, the length of the time domain resources used to transmit the physical sidelink feedback channel PSFCH, and the length of the time domain resources used to transmit the demodulation reference signal DMRS.

[0012] Based on the above technical solution, for example, the time domain resources that can be used to transmit the sidelink positioning reference signal in a time slot may be time domain resources other than the time domain resources used to transmit PSCCH, the time domain resources used to transmit PSFCH, the time domain resources used to transmit DMRS, etc. in the time slot. For another example, the time domain resources that can be used to transmit the sidelink positioning reference signal in a time slot may be the time domain resources used to transmit PSSCH in the time slot, except for the time domain resources used to transmit other signals. Among them, other signals may include but are not limited to: PSFCH, reference signals other than the sidelink positioning reference signal, GAP, etc.

[0013] In combination with the first aspect, in some implementations of the first aspect, the length of the time domain resource that can be used to transmit the sidelink positioning reference signal satisfies any of the following:

[0014] Ma=l d -l PSCCH -X1,

[0015] Ma=l d -l PSCCH -l DMRS –X2,

[0016] Ma=l d – X3;

[0017] Wherein, Ma represents the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, l d Indicates the length of the time domain resource used to transmit PSSCH, l PSCCH Indicates the length of the time domain resource used to transmit PSCCH, l DMRS represents the length of the time domain resource used to transmit the demodulation reference signal DMRS, and X1, X2, and X3 are constants.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, d = l SL –l PSFCH ; Among them, l SL Indicates the length of the time domain resource used for sideline transmission, l PSFCH Indicates the length of the time domain resources used to transmit PSFCH.

[0019] In combination with the first aspect, in some implementations of the first aspect, the PSFCH The value of is any of the following: 0, 1, 2, or 3.

[0020] In combination with the first aspect, in some implementations of the first aspect, the value of X1 is any one of the following: 0, 1, 2 or 3.

[0021] In combination with the first aspect, in some implementations of the first aspect, the value of X2 is 0 or 1.

[0022] In combination with the first aspect, in some implementations of the first aspect, the value of X3 is 0 or 1.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the first communication device receives second indication information, and the second indication information indicates at least one of the following: the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal; or, the first communication device determines at least one of the following: the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal.

[0024] Based on the above technical solution, the first communication device can receive the starting position of the time domain resources used to transmit the sidelink positioning reference signal and the length of the time domain resources used to transmit the sidelink positioning reference signal from other devices, or it can determine the starting position of the time domain resources used to transmit the sidelink positioning reference signal and the length of the time domain resources used to transmit the sidelink positioning reference signal by itself, and the method is flexible.

[0025] In combination with the first aspect, in certain implementations of the first aspect, the first communication device receives second indication information, including: the first communication device receives first sidelink control information, and the first sidelink control information includes the second indication information.

[0026] In combination with the first aspect, in certain implementations of the first aspect, the identifier of the first resource is obtained by encoding the length of the time domain resource that can be used to transmit the sidelink positioning reference signal.

[0027] In combination with the first aspect, in some implementations of the first aspect, the identifier of the first resource satisfies any of the following:

[0028] n id =S start ,

[0029] n id =S start +Ma, or

[0030] n id =S start +2Ma-1,

[0031] Among them, n id represents the identifier of the first resource, S start It represents the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and Ma represents the length of the time domain resources that can be used to transmit the sidelink positioning reference signal.

[0032] In combination with the first aspect, in certain implementations of the first aspect, the first resource is also determined based on at least one of the following: a time domain resource for transmitting a sidelink reference signal, a time domain resource for transmitting sidelink feedback information, and a time domain resource for transmitting a PSSCH.

[0033] The sidelink reference signal refers to a sidelink reference signal other than a sidelink positioning reference signal. As an example, the sidelink reference signal includes at least one of the following: PT-RS, CSI-RS, BM-RS or DMRS.

[0034] Based on the above technical solution, when determining the first resource, invalid resources can also be excluded, such as time domain resources for transmitting sidelink reference signals, time domain resources for transmitting sidelink feedback information, and time domain resources for transmitting PSSCH.

[0035] In combination with the first aspect, in certain implementations of the first aspect, the first communication device obtains the identifier of the first resource, including: the first communication device obtains the identifiers of N resources by encoding the length of the time domain resources that can be used to transmit the sidelink positioning reference signal, where N is an integer greater than 1; the first communication device determines the identifier of the first resource based on the identifiers of the N resources and a preset rule, and the preset rule indicates that: the first resource is a continuous resource, and / or, the first resource does not include one of the following indications: the time domain resource for transmitting the sidelink reference signal, the time domain resource for transmitting the sidelink feedback information, and the time domain resource for transmitting the PSSCH.

[0036] Based on the above technical solution, when determining the identifier of the first resource, invalid codes can also be excluded according to preset rules, thereby reducing the signaling overhead caused by the resource identifier indication.

[0037] In combination with the first aspect, in certain implementations of the first aspect, the value of the identifier of the first resource is W bits, the W bits include a first bit and a second bit, W is an integer greater than 1, and the identifier of the first resource satisfies any of the following items: the first bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the second bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, the second bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the first bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, the identifier of the first resource is obtained by jointly encoding the length of the time domain resource used to transmit the sidelink positioning reference signal and the starting position of the time domain resource used to transmit the sidelink positioning reference signal.

[0038] Based on the above technical solution, the resource identifier of the sidelink positioning reference signal can be determined by the length of the time domain resources used to transmit the sidelink positioning reference signal and the starting position of the time domain resources used to transmit the sidelink positioning reference signal.

[0039] In combination with the first aspect, in some implementations of the first aspect, the first bit is a high bit of the identifier of the first resource, and the second bit is a low bit of the identifier of the first resource.

[0040] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first communication device sends third indication information, and the third indication information indicates: the first resource or an identifier of the first resource.

[0041] In combination with the first aspect, in certain implementations of the first aspect, the first communication device sends third indication information, including: the first communication device sends second sidelink control information, and the second sidelink control information includes the third indication information.

[0042] In combination with the first aspect, in certain implementations of the first aspect, the third indication information includes at least one of the following: an identifier of the first resource, a starting position of the first resource in the time domain, a length of the first resource in the time domain, an ending position of the first resource in the time domain, an offset of the first resource in the frequency domain, and a comb tooth size of the first resource in the frequency domain.

[0043] In combination with the first aspect, in certain implementations of the first aspect, the first resource includes a first transmission resource and a second transmission resource, the first transmission resource and the second transmission resource are discontinuous in the time domain, and the third indication information includes an offset of the first resource in the frequency domain, wherein the offset of the first resource in the frequency domain includes an offset of the first transmission resource in the frequency domain and / or an offset of the second transmission resource in the frequency domain.

[0044] Based on the above technical solution, when the sidelink positioning reference signal has multiple transmission resources, the first communication device can indicate the offset of some or all of the multiple transmission resources in the frequency domain.

[0045] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the first communication device receives fourth indication information, and the fourth indication information indicates a second resource; the first communication device obtains an identifier of the first resource, including: the first communication device determines the first resource based on the second resource and the resources that the first communication device can use, and the length of the first resource in the time domain resource is less than the length of the second resource in the time domain resource.

[0046] Based on the above technical solution, when the indicated resources (such as configured resources) do not match the resources actually available to the first communication device, the first communication device may select appropriate resources to transmit the sidelink positioning reference signal.

[0047] In combination with the first aspect, in certain implementations of the first aspect, the first communication device uses the first resource to send the sidelink positioning reference signal, including: the first communication device transmits the sidelink positioning reference signal in a fully staggered manner based on the length of the first resource in the time domain resource; or, the first communication device transmits the sidelink positioning reference signal in a partially staggered manner on the first resource based on the length of the second resource in the time domain resource.

[0048] Based on the above technical solution, when the indicated resources (such as configured resources) do not match the resources actually available to the first communication device, the first communication device can select appropriate resources to transmit the sidelink positioning reference signal, and can send the sidelink positioning reference signal in a fully interleaved manner according to a smaller number of symbols based on the nearest allowed number of symbols; or, send the sidelink positioning reference signal in a partially interleaved manner according to the configured number of symbols and the corresponding Comb size.

[0049] In combination with the first aspect, in some implementations of the first aspect, the method also includes: the first communication device receives fifth indication information, and the fifth indication information indicates that the first communication device transmits the sidelink positioning reference signal using the fully staggered method or the partially staggered method.

[0050] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first communication device itself determines whether to transmit the sidelink positioning reference signal in the fully staggered manner or in the partially staggered manner.

[0051] In combination with the first aspect, in some implementations of the first aspect, the method also includes: the first communication device receives sixth indication information, and the sixth indication information indicates the minimum length of the time domain resources used to transmit the sidelink positioning reference signal.

[0052] Based on the above technical solution, the minimum length (such as the minimum number of symbols) of the time domain resource for transmitting the sidelink positioning reference signal can be limited. In this way, when the number of symbols actually used by the first communication device to transmit the sidelink positioning reference signal is less than the minimum number of symbols, the first communication device does not send the sidelink positioning reference signal in the current time slot. In this way, the transmission performance of the sidelink positioning reference signal can be guaranteed.

[0053] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: the first communication device sends reservation information in a first time slot where the first resource is located, the reservation information indicates at least one second time slot, the second time slot is a time slot where the data packet is retransmitted, and the first time slot and / or the second time slot also includes a second resource for transmitting the sidelink positioning reference signal.

[0054] In combination with the first aspect, in some implementations of the first aspect, the first resource is part of the resources in a time slot.

[0055] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the first communication device sends at least one of the following in a first time slot where the first resource is located: PSCCH, PSSCH, automatic gain control AGC.

[0056] In combination with the first aspect, in certain implementations of the first aspect, the time domain resources of the sidelink positioning reference signal in the first time slot are located after the time domain resources of the PSCCH in the first time slot; and / or, the time domain resources of the AGC in the first time slot are located before the time domain resources of the PSCCH in the first time slot, the time domain resources of the PSSCH in the first time slot, and the time domain resources of the sidelink positioning reference signal in the first time slot.

[0057] In combination with the first aspect, in some implementations of the first aspect, the length of the time domain resource is the length of the time domain resource in a time slot.

[0058] For example, the length of the time domain resources that can be used to transmit the sidelink positioning reference signal may be the number of symbols that can be used to transmit the sidelink positioning reference signal in a time slot; the length of the time domain resources used to transmit PSSCH may be the number of symbols used to transmit PSSCH in the time slot; the length of the time domain resources used to transmit PSCCH may be the number of symbols used to transmit PSCCH in the time slot; the length of the time domain resources used to transmit PSFCH may be the number of symbols used to transmit PSFCH in the time slot; the length of the time domain resources used to transmit DMRS may be the number of symbols used to transmit DMRS in the time slot.

[0059] In combination with the first aspect, in some implementations of the first aspect, the first resource is continuous in the time domain.

[0060] In combination with the first aspect, in certain implementations of the first aspect, the first resource overlaps with a third resource, and the third resource is used to transmit a sidelink reference signal. The method also includes: using a resource in the third resource that does not overlap with the first resource to send the sidelink reference signal.

[0061] In combination with the first aspect, in certain implementations of the first aspect, the first resource belongs to a candidate resource among k candidate resources, k is an integer greater than 1, the first resource does not overlap with the third resource, and the third resource is used to transmit a sidelink reference signal.

[0062] In combination with the first aspect, in certain implementations of the first aspect, obtaining the identifier of the first resource includes: receiving configuration information of the third resource and configuration information of the k candidate resources; and determining the identifier of the first resource based on the configuration information of the third resource and the configuration information of the k candidate resources.

[0063] In combination with the first aspect, in some implementations of the first aspect, the k candidate resources include the first resource and a second candidate resource, the second candidate resource is a candidate resource overlapping with the third resource, and the first candidate resource is adjacent to the second candidate resource.

[0064] In combination with the first aspect, in some implementations of the first aspect, the method further includes: receiving seventh indication information, where the seventh indication information indicates a value of k.

[0065] In combination with the first aspect, in certain implementations of the first aspect, obtaining the identifier of the first resource includes: receiving eighth indication information, the eighth indication information indicating at least one of the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, and a DMRS pattern; determining the identifier of the first resource based on the eighth indication information.

[0066] In combination with the first aspect, in certain implementations of the first aspect, the identifier of the first resource is associated with at least one of the following: the length of the time domain resource used to transmit the sidelink positioning reference signal, the offset of the first resource in the frequency domain, and the comb tooth size of the first resource in the frequency domain.

[0067] In combination with the first aspect, in certain implementations of the first aspect, the sidelink reference signal is a phase tracking reference signal.

[0068] In a second aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or can also be a component of a communication device (such as a chip or a circuit), which is not limited to this. For ease of description, the following is an example of the method being performed by a second communication device.

[0069] The method may include: a second communication device receives a first resource or an identifier of a first resource, wherein the identifier of the first resource is determined based on at least one of the following: the length of a time domain resource that can be used to transmit the sidelink positioning reference signal, the starting position of the time domain resource for transmitting the sidelink positioning reference signal, and the length of the time domain resource for transmitting the sidelink positioning reference signal; the second communication device uses the first resource to receive the sidelink positioning reference signal.

[0070] In combination with the second aspect, in certain implementations of the second aspect, the method also includes: the second communication device determines the first resource based on the identifier of the first resource and at least one of the following: the length of the time domain resources of the physical sidelink control channel PSCCH, the pattern of the demodulation reference signal DMRS, and the length of the time domain resources of the physical sidelink feedback channel PSFCH.

[0071] For example, the length of the time domain resources of the PSCCH, such as the number of symbols occupied by the PSCCH, may be indicated by the configuration information.

[0072] For example, the pattern of the DMRS may be indicated by the first communication device.

[0073] For example, the length of the PSFCH time domain resource may be the number of symbols occupied by the PSFCH in the current time domain unit (eg, the current time slot). For example, the second communication device may determine the first resource based on the identifier of the first resource and whether there is a PSFCH resource in the current time domain unit.

[0074] Based on the above technical solution, after the second communication device receives the identifier of the first resource, it also determines the physical resources actually occupied by the sidelink positioning reference signal corresponding to the identifier of the first resource based on at least one of the following information: the number of symbols occupied by PSCCH, the pattern of DMRS, and whether there are PSFCH resources in the receiving time slot at that time. After the second communication device obtains the above information, the second communication device's understanding of the number and position of symbols that can be used to transmit the sidelink positioning reference signal in the current time slot is the same as that of the first communication device. Then the second communication device can uniquely determine the position corresponding to this sidelink positioning reference signal resource in the time slot (such as the position of the start and end symbols) based on the indication information of the received sidelink positioning reference signal resource identifier. Thereby, under the condition of saving the indication signaling of SCI, the resources of the sidelink positioning reference signal are accurately indicated in the second communication device and the first communication device, avoiding errors in resource indication.

[0075] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the second communication device obtains positioning-related information according to the sidelink positioning reference signal.

[0076] In combination with the second aspect, in certain implementations of the second aspect, the length of the time domain resources that can be used to transmit the sidelink positioning reference signal is determined based on at least one of the following: the length of the time domain resources used to transmit the physical sidelink shared channel PSSCH, the length of the time domain resources used to transmit the physical sidelink control channel PSCCH, the length of the time domain resources used to transmit the physical sidelink feedback channel PSFCH, and the length of the time domain resources used to transmit the demodulation reference signal DMRS.

[0077] In combination with the second aspect, in some implementations of the second aspect, the length of the time domain resource that can be used to transmit the sidelink positioning reference signal satisfies any of the following:

[0078] Ma=l d -l PSCCH -X1,

[0079] Ma=l d -l PSCCH -l DMRS –X2,

[0080] Ma=l d – X3;

[0081] Wherein, Ma represents the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, l d Indicates the length of the time domain resource used to transmit PSSCH, l PSCCH Indicates the length of the time domain resource used to transmit PSCCH, l DMRS represents the length of the time domain resource used to transmit the demodulation reference signal DMRS, and X1, X2, and X3 are constants.

[0082] In conjunction with the second aspect, in some implementations of the second aspect, d = l SL –l PSFCH ; Among them, l SL Indicates the length of the time domain resource used for sideline transmission, l PSFCH Indicates the length of the time domain resources used to transmit PSFCH.

[0083] In conjunction with the second aspect, in certain implementations of the second aspect, the PSFCH The value of is any of the following: 0, 1, 2, or 3.

[0084] In combination with the second aspect, in some implementations of the second aspect, the value of X1 is any one of the following: 0, 1, 2 or 3.

[0085] In combination with the second aspect, in some implementations of the second aspect, the value of X2 is 0 or 1.

[0086] In combination with the second aspect, in some implementations of the second aspect, the value of X3 is 0 or 1.

[0087] In combination with the second aspect, in certain implementations of the second aspect, the method also includes: the second communication device receives second indication information, and the second indication information indicates at least one of the following: the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal.

[0088] In combination with the second aspect, in certain implementations of the second aspect, the second communication device receives second indication information, including: the second communication device receives first sidelink control information, and the first sidelink control information includes the second indication information.

[0089] In combination with the second aspect, in certain implementations of the second aspect, the identifier of the first resource is obtained by encoding the length of the time domain resource that can be used to transmit the sidelink positioning reference signal.

[0090] In conjunction with the second aspect, in some implementations of the second aspect, the identifier of the first resource satisfies any of the following:

[0091] n id =S start ,

[0092] n id =S start +Ma, or

[0093] n id =S start +2Ma-1,

[0094] Among them, n id represents the identifier of the first resource, S start It represents the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and Ma represents the length of the time domain resources that can be used to transmit the sidelink positioning reference signal.

[0095] In combination with the second aspect, in certain implementations of the second aspect, the value of the identifier of the first resource is W bits, the W bits include a first bit and a second bit, W is an integer greater than 1, and the identifier of the first resource satisfies any of the following items: the first bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the second bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, the second bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the first bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, the identifier of the first resource is obtained by jointly encoding the length of the time domain resource used to transmit the sidelink positioning reference signal and the starting position of the time domain resource used to transmit the sidelink positioning reference signal.

[0096] In combination with the second aspect, in some implementations of the second aspect, the first bit is a high bit of the identifier of the first resource, and the second bit is a low bit of the identifier of the first resource.

[0097] In combination with the second aspect, in some implementations of the second aspect, the second communication device receives the identifier of the first resource, including: the second communication device receives third indication information, and the third indication information indicates the identifier of the first resource.

[0098] In combination with the second aspect, in certain implementations of the second aspect, the second communication device receives third indication information, including: the second communication device receives second sidelink control information, and the second sidelink control information includes the third indication information.

[0099] In combination with the second aspect, in certain implementations of the second aspect, the third indication information includes at least one of the following: an identifier of the first resource, a starting position of the first resource in the time domain, a length of the first resource in the time domain, an ending position of the first resource in the time domain, an offset of the first resource in the frequency domain, and a comb tooth size of the first resource in the frequency domain.

[0100] In combination with the second aspect, in certain implementations of the second aspect, the first resource includes a first transmission resource and a second transmission resource, the first transmission resource and the second transmission resource are discontinuous in the time domain, and the third indication information includes an offset of the first resource in the frequency domain, wherein the offset of the first resource in the frequency domain includes an offset of the first transmission resource in the frequency domain and / or an offset of the second transmission resource in the frequency domain.

[0101] In combination with the second aspect, in some implementations of the second aspect, the first resource is a portion of resources in a time slot.

[0102] In combination with the second aspect, in some implementations of the second aspect, the method further includes: the second communication device receives at least one of the following in the first time slot where the first resource is located: PSCCH, PSSCH, automatic gain control AGC.

[0103] In combination with the second aspect, in certain implementations of the second aspect, the time domain resources of the sidelink positioning reference signal in the first time slot are located after the time domain resources of the PSCCH in the first time slot; and / or, the time domain resources of the AGC in the first time slot are located before the time domain resources of the PSCCH in the first time slot, the time domain resources of the PSSCH in the first time slot, and the time domain resources of the sidelink positioning reference signal in the first time slot.

[0104] In combination with the second aspect, in certain implementations of the second aspect, the length of the time domain resource is the length of the time domain resource in a time slot.

[0105] In combination with the second aspect, in some implementations of the second aspect, the first resources are continuous in the time domain.

[0106] In combination with the second aspect, in certain implementations of the second aspect, the first resource overlaps with a third resource, and the third resource is used to transmit a sidelink reference signal. The method also includes: using resources in the third resource that do not overlap with the first resource to receive the sidelink reference signal.

[0107] In combination with the second aspect, in certain implementations of the second aspect, the first resource belongs to a candidate resource among k candidate resources, k is an integer greater than 1, the first resource does not overlap with the third resource, and the third resource is used to transmit a sidelink reference signal.

[0108] In combination with the second aspect, in certain implementations of the second aspect, the second communication device receives the identifier of the first resource, including: the second communication device receives the configuration information of the third resource and the configuration information of the k candidate resources; the second communication device determines the identifier of the first resource based on the configuration information of the third resource and the configuration information of the k candidate resources.

[0109] In combination with the second aspect, in some implementations of the second aspect, the k candidate resources include the first resource and a second candidate resource, the second candidate resource is a candidate resource overlapping with the third resource, and the first candidate resource is adjacent to the second candidate resource.

[0110] In combination with the second aspect, in some implementations of the second aspect, the method further includes: receiving seventh indication information, where the seventh indication information indicates a value of k.

[0111] In combination with the second aspect, in certain implementations of the second aspect, the second communication device receives an identifier of the first resource, including: the second communication device receives eighth indication information, the eighth indication information indicating at least one of the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, and a DMRS pattern; the second communication device determines the identifier of the first resource based on the eighth indication information.

[0112] In combination with the second aspect, in certain implementations of the second aspect, the identifier of the first resource is associated with at least one of the following: the length of the time domain resource used to transmit the sidelink positioning reference signal, the offset of the first resource in the frequency domain, and the comb tooth size of the first resource in the frequency domain.

[0113] In combination with the second aspect, in certain implementations of the second aspect, the sidelink reference signal is a phase tracking reference signal.

[0114] Regarding the beneficial effects of the second aspect, reference may be made to the relevant description in the first aspect and will not be repeated here.

[0115] In a third aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or can be a component of a communication device (such as a chip or a circuit), which is not limited to this. For ease of description, the following is an example of the method being performed by a first communication device.

[0116] The method may include: a first communication device acquires a first resource, the first resource is used to transmit a sidelink positioning reference signal, the first resource includes T transmission resources, at least two of the T transmission resources are discontinuous in the time domain, and T is an integer greater than 1; the first communication device sends indication information, the indication information indicates at least one transmission resource among the first resources, and at least one transmission resource among the first resources is used to transmit the sidelink positioning reference signal.

[0117] Based on the above technical solution, there may be multiple transmission resources in a time slot to transmit the sidelink positioning reference signal. When there are multiple transmission resources for the sidelink positioning reference signal, the first communication device may indicate some or all of the transmission resources in the multiple transmission resources.

[0118] In combination with the third aspect, in certain implementations of the third aspect, the T transmission resources include a first transmission resource and a second transmission resource, and the indication information indicates at least one of the first resources, including: the indication information indicates at least one of the following: the position of the first transmission resource in the time domain, the offset or comb tooth size of the first transmission resource in the frequency domain, the position of the second transmission resource in the time domain, and the comb tooth offset or comb tooth size of the second transmission resource in the frequency domain.

[0119] In combination with the third aspect, in certain implementations of the third aspect, the indication information is an identifier of the first resource, and the identifier of the first resource is determined based on at least one of the following: an offset of the sidelink positioning reference signal in the frequency domain; a comb tooth size of the i-th transmission of the sidelink positioning reference signal, where i is an integer greater than 1 or equal to 1; and indication information of the sidelink positioning reference signal transmitted on the i-th transmission resource.

[0120] In combination with the third aspect, in some implementations of the third aspect, the identifier of the first resource satisfies any of the following:

[0121] n ID =n RE +m s *N 1,comb

[0122] n ID =n RE +N 1,comb +(m s -1)*N 2,comb

[0123] n ID =n RE +N 1,comb +N 2,comb +(m s -2)*N 3,comb

[0124] Among them, n ID Indicates the identifier of the first resource; N i,comb represents the comb tooth size of the sidelink positioning reference signal transmitted for the i-th time; n RE represents the offset of the sidelink positioning reference signal in the frequency domain; m s =i-1, indicating the indication information that the sidelink positioning reference signal is transmitted on the i-th transmission resource; i=1,2,3.

[0125] In combination with the third aspect, in certain implementations of the third aspect, the first communication device sends indication information, including: the first communication device sends sidelink control information, and the sidelink control information includes the indication information.

[0126] In combination with the third aspect, in certain implementations of the third aspect, the first resource is a portion of resources in a time slot.

[0127] In combination with the third aspect, in certain implementations of the third aspect, the method further includes: the first communication device sends at least one of the following in the first time slot where the first resource is located: PSCCH, PSSCH, automatic gain control AGC.

[0128] In combination with the third aspect, in certain implementations of the third aspect, the time domain resources of the sidelink positioning reference signal in the first time slot are located after the time domain resources of the PSCCH in the first time slot; and / or, the time domain resources of the AGC in the first time slot are located before the time domain resources of the PSCCH in the first time slot, the time domain resources of the PSSCH in the first time slot, and the time domain resources of the sidelink positioning reference signal in the first time slot.

[0129] In combination with the third aspect, in certain implementations of the third aspect, the length of the time domain resource is the length of the time domain resource in a time slot.

[0130] In combination with the third aspect, in certain implementations of the third aspect, each of the T transmission resources is continuous in the time domain.

[0131] In a fourth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or can also be a component of a communication device (such as a chip or a circuit), which is not limited to this. For ease of description, the following is an example of the method being performed by a second communication device.

[0132] The method may include: a second communication device receives indication information, the indication information indicates at least one transmission resource in the first resources, the first resource is used to transmit a sidelink positioning reference signal, the first resource includes T transmission resources, at least two of the T transmission resources are discontinuous in the time domain, and T is an integer greater than 1; the second communication device receives the sidelink positioning reference signal according to the indication information.

[0133] In combination with the fourth aspect, in certain implementations of the fourth aspect, the T transmission resources include a first transmission resource and a second transmission resource, and the indication information indicates at least one transmission resource among the first resources, including: the indication information indicates at least one of the following: the position of the first transmission resource in the time domain, the offset or comb tooth size of the first transmission resource in the frequency domain, the position of the second transmission resource in the time domain, and the offset or comb tooth size of the second transmission resource in the frequency domain.

[0134] In combination with the fourth aspect, in certain implementations of the fourth aspect, the indication information is an identifier of the first resource, and the identifier of the first resource is determined based on at least one of the following: an offset of the sidelink positioning reference signal in the frequency domain; a comb tooth size of the i-th transmission of the sidelink positioning reference signal, where i is an integer greater than 1 or equal to 1; and indication information of the sidelink positioning reference signal transmitted on the i-th transmission resource.

[0135] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the identifier of the first resource satisfies any of the following:

[0136] n ID =n RE +m s *N 1,comb

[0137] n ID =n RE +N 1,comb +(m s -1)*N 2,comb

[0138] nID =n RE +N 1,comb +N 2,comb +(m s -2)*N 3,comb

[0139] Among them, n ID Indicates the identifier of the first resource; N i,comb represents the comb tooth size of the sidelink positioning reference signal transmitted for the i-th time; n RE represents the offset of the sidelink positioning reference signal in the frequency domain; m s =i-1, indicating the indication information that the sidelink positioning reference signal is transmitted on the i-th transmission resource; i=1,2,3.

[0140] In combination with the fourth aspect, in certain implementations of the fourth aspect, the second communication device receives indication information, including: the second communication device receives sidelink control information, and the sidelink control information includes the indication information.

[0141] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first resource is a portion of resources in a time slot.

[0142] In combination with the fourth aspect, in certain implementations of the fourth aspect, the method further includes: the second communication device receives at least one of the following in the first time slot where the first resource is located: PSCCH, PSSCH, automatic gain control AGC.

[0143] In combination with the fourth aspect, in certain implementations of the fourth aspect, the time domain resources of the sidelink positioning reference signal in the first time slot are located after the time domain resources of the PSCCH in the first time slot; and / or, the time domain resources of the AGC in the first time slot are located before the time domain resources of the PSCCH in the first time slot, the time domain resources of the PSSCH in the first time slot, and the time domain resources of the sidelink positioning reference signal in the first time slot.

[0144] In combination with the fourth aspect, in certain implementations of the fourth aspect, the length of the time domain resource is the length of the time domain resource in a time slot.

[0145] In combination with the fourth aspect, in certain implementations of the fourth aspect, each of the T transmission resources is continuous in the time domain.

[0146] Regarding the beneficial effects of the fourth aspect, reference may be made to the relevant description in the third aspect and will not be repeated here.

[0147] In a fifth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or a component of a communication device (such as a chip or a circuit), which is not limited.

[0148] The method may include: obtaining information of a third resource, wherein the third resource is used to transmit a first reference signal; obtaining information of a fourth resource, wherein the fourth resource is used to transmit a second reference signal; using resources other than a fifth resource in the third resource to transmit the first reference signal, and using the fourth resource to transmit the second reference signal, wherein the fifth resource is a resource in the third resource that overlaps with the fourth resource; the first reference signal is a sidelink positioning reference signal, and the second reference signal is a phase tracking reference signal or CSI-RS; or, the first reference signal is a phase tracking reference signal or CSI-RS, and the second reference signal is a sidelink positioning reference signal.

[0149] In combination with the fifth aspect, in certain implementations of the fifth aspect, the third resource includes a first candidate resource and a second candidate resource, the fifth resource includes the first candidate resource, and the use of resources other than the fifth resource in the third resource to transmit the first reference signal includes: using the second candidate resource to transmit the first reference signal.

[0150] In combination with the fifth aspect, in some implementations of the fifth aspect, the first candidate resource and the second candidate resource are two consecutive candidate resources.

[0151] In combination with the fifth aspect, in certain implementations of the fifth aspect, the first reference signal is a sidelink positioning reference signal, the second reference signal is a phase tracking reference signal, and the third resource is continuous in the time domain resource, or the third resource is continuous in a time domain unit.

[0152] In a sixth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a communication device (such as a terminal device), or a component of a communication device (such as a chip or a circuit), which is not limited.

[0153] The method may include: obtaining configuration information, the configuration information including: the length of time domain resources used to transmit a physical sidelink shared channel PSSCH, the length of time domain resources used to transmit a physical sidelink control channel PSCCH, and a pattern of a demodulation reference signal DMRS; determining the third resource based on the configuration information, the third resource being used to transmit a sidelink positioning reference signal.

[0154] In combination with the sixth aspect, in certain implementations of the sixth aspect, the configuration information includes at least one of the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, and the pattern of DMRS.

[0155] In combination with the sixth aspect, in certain implementations of the sixth aspect, the identifier of the third resource is related to at least one of the following: the length of the third resource in the time domain, the comb tooth size of the third resource in the frequency domain, and the offset of the third resource in the frequency domain.

[0156] In combination with the sixth aspect, in some implementations of the sixth aspect, the method further includes: sending an identifier of the third resource.

[0157] In a seventh aspect, a communication device is provided, the device being used to execute the method in any possible implementation of the first to sixth aspects. Specifically, the device may include a unit and / or module, such as a processing unit and / or a communication unit, for executing the method in any possible implementation of the first to sixth aspects.

[0158] In one implementation, the apparatus is a communication device (such as a terminal device). When the apparatus is a communication device, the communication unit may be a transceiver, or an input / output interface; the processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0159] In another implementation, the device is a chip, a chip system or a circuit for a communication device (such as a terminal device). When the device is a chip, a chip system or a circuit for a communication device, the communication unit may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, a processing circuit or a logic circuit.

[0160] In an eighth aspect, a communication device is provided, comprising: at least one processor for executing a computer program or instruction stored in a memory to execute a method in any possible implementation of the first to sixth aspects above.

[0161] Optionally, the apparatus further comprises a memory for storing computer programs or instructions.

[0162] Optionally, the device further comprises a communication interface, and the processor reads the computer program or instructions stored in the memory through the communication interface.

[0163] In one implementation, the apparatus is a communication device (such as a terminal device).

[0164] In another implementation, the apparatus is a chip, a chip system or a circuit for a communication device (such as a terminal device).

[0165] In a ninth aspect, the present application provides a processor for executing the methods provided in the first to sixth aspects above.

[0166] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processor output, reception, input, etc., or as sending and receiving operations performed by the radio frequency circuit and antenna, and this application does not limit this.

[0167] In a tenth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes a method for executing any possible implementation of the first to sixth aspects above.

[0168] In an eleventh aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer is enabled to execute a method in any possible implementation of the first to sixth aspects above.

[0169] In a twelfth aspect, a communication system is provided, comprising the aforementioned first communication device and second communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0170] Figure 1 It is a schematic diagram of an application scenario 100 involved in the present application.

[0171] Figure 2 It is a schematic diagram of an application scenario 200 involved in the present application.

[0172] Figure 3 It is a schematic diagram of resources occupied by a downlink positioning reference signal.

[0173] Figure 4 It is a schematic diagram of resources occupied by an uplink positioning reference signal.

[0174] Figure 5 and Figure 6 It is a schematic diagram of two time slot structures in SL.

[0175] Figure 7 It is a schematic diagram of a method 700 provided in an embodiment of the present application.

[0176] Figure 8 It is a schematic diagram of a time slot structure applicable to an embodiment of the present application.

[0177] Fig. 9It is a schematic diagram of PSSCH and SL-PRS transmission applicable to an embodiment of the present application.

[0178] Fig.10 It is a schematic diagram of sending SL-PRS in a partially staggered manner applicable to an embodiment of the present application.

[0179] Fig.11 It is a schematic diagram of SL-PRS transmission applicable to an embodiment of the present application.

[0180] Fig.12 Yes d Schematic diagram of the time slot structure of DMRS, PSCCH and PT-RS when =13.

[0181] Fig.13 It is a schematic block diagram of a communication device 1300 provided in an embodiment of the present application.

[0182] Fig.14 It is a schematic block diagram of a communication device 1400 provided in an embodiment of the present application.

[0183] Fig.15 It is a schematic block diagram of a chip system 1500 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0184] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0185] The technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system. The technical solution provided in this application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and Internet of things (Internet of things, IoT) communication system. The technical solution provided in this application can also be applied to non-terrestrial network (NTN) systems such as intersatellite communication and satellite communication.

[0186] As an example, a satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with the base station. The satellite can be used as a base station or as a terminal device. Among them, the satellite can refer to a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, etc. The satellite can also refer to a non-ground base station or non-ground equipment, etc.

[0187] As an example, V2X communication may include: vehicle-to-vehicle (V2V) communication, vehicle-to-roadside infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication. V2V refers to communication between vehicles. V2P refers to communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers, etc.). V2I refers to communication between vehicles and infrastructure, such as road side units (RSU) or network equipment. Among them, RSU includes two types: terminal type RSU and base station type RSU. Among them, terminal type RSU is in a non-mobile state because it is located on the roadside and does not need to consider mobility; base station type RSU can provide timing synchronization and resource scheduling to vehicles communicating with it. V2N refers to communication between vehicles and network equipment. It can be understood that the above is an exemplary description and the embodiments of the present application are not limiting. For example, V2X may also include V2X communications based on the NR system of the current 3GPP Rel-16 and subsequent versions.

[0188] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0189] The terminal device may be a device that provides voice / data to users, for example, a handheld device or a vehicle-mounted device with a wireless connection function. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (public land mobile The embodiments of the present application do not limit this.

[0190] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0191] In the embodiment of the present application, the device for realizing the function of the terminal device, i.e., the terminal device, can be the terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0192] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point, master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip for being arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs the base station function in a future communication system. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network device.

[0193] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0194] In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit user plane (central unit-user plane, CU-UP)) and a DU node.

[0195] In the embodiment of the present application, the device for realizing the function of the network device can be a network device, or a device capable of supporting the network device to realize the function, such as a chip system or a chip, which can be installed in the network device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0196] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0197] To facilitate understanding of the embodiments of the present application, first, Figure 1 and Figure 2 Taking the example, the application scenarios to which the embodiments of the present application are applicable are described.

[0198] Figure 1 It is a schematic diagram of an application scenario 100 involved in the present application. As an example, the application scenario 100 is a sidelink (SL) positioning scenario. The sidelink may also be referred to as a side link or a side link, etc. It can be understood that the sidelink represents a connection relationship between terminal devices and terminal devices, which is a logical concept rather than a physical entity. The sidelink is only named for distinction, and its specific naming does not limit the scope of protection of the present application.

[0199] As an example, in Figure 1 The scenario shown may include a terminal device 110, a terminal device 120, and a positioning management device 130. The terminal device 110 may be a terminal device to be positioned, and the terminal device 120 may be another terminal device or a roadside unit. It should be understood that in this positioning scenario, the terminal device 110 and the terminal device 120 may be positioned via a direct communication interface (i.e., PC5 interface).

[0200] In a first possible implementation, the terminal device 110 has at least two antennas, and the terminal device 120 also has at least two antennas. The terminal device 120 sends a reference signal to the terminal device 110 through the at least two antennas, and the terminal device 110 receives the reference signal through the at least two antennas and completes the measurement of the reference signal.

[0201] For example, the terminal device 110 determines the position and / or posture of the terminal device 110 according to the measurement information.

[0202] For another example, the terminal device 110 sends the measured information to the terminal device 120, and the terminal device 120 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0203] For another example, the terminal device 110 sends the measured information to the positioning management device 130, and the positioning management device 130 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0204] In a second possible implementation, the terminal device 110 has at least two antennas, and the terminal device 120 may be composed of at least two terminal devices. The at least two terminal devices included in the terminal device 120 respectively send reference signals to the terminal device 110 on their own antennas, and the terminal device 110 may receive the reference signals on different antennas and complete the measurement of the reference signals.

[0205] For example, the terminal device 110 will determine the position and / or posture of the terminal device 110 according to the measurement information.

[0206] For another example, the terminal device 110 sends the measured information to the terminal device 120, and the terminal device 120 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0207] For another example, the terminal device 110 sends the measured information to the positioning management device 130, and the positioning management device 130 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0208] In a third possible implementation, the terminal device 110 has at least two antennas, and the terminal device 120 also has at least two antennas. The terminal device 110 sends a reference signal to the terminal device 120 through the at least two antennas, and the terminal device 120 receives the reference signal through the at least two antennas and completes the measurement of the reference signal.

[0209] For example, the terminal device 120 will determine the position and / or posture of the terminal device 110 according to the measurement information.

[0210] For another example, the terminal device 120 sends the measured information to the terminal device 110, and the terminal device 110 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0211] For another example, the terminal device 120 sends the measured information to the positioning management device 130, and the positioning management device 130 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0212] In a fourth possible implementation, the terminal device 110 has at least two antennas, and the terminal device 120 may be composed of at least two terminal devices. The terminal device 110 sends a reference signal to the terminal device 120 on at least two antennas, and the at least two terminal devices included in the terminal device 120 receive the reference signal on the same antenna respectively and complete the measurement of the reference signal.

[0213] For example, any one device included in the terminal device 120 or at least two devices included in the terminal device 120 may determine the position and / or posture of the terminal device 110 according to the measurement information.

[0214] For another example, at least two terminal devices of the terminal device 120 may send measured information to the terminal device 110, and the terminal device 110 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0215] For another example, at least two terminal devices of the terminal device 120 may send measured information to the positioning management device 130 , and the positioning management device 130 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0216] In a fifth possible implementation, the terminal device 110 has at least two antennas, and the terminal device 120 has only one antenna. The terminal device 110 sends a reference signal to the terminal device 120 through at least two antennas, and the terminal device 120 receives the reference signal through the same antenna and completes the measurement of the reference signal.

[0217] For example, the terminal device 120 determines the position and / or posture of the terminal device 110 according to the measurement information.

[0218] For another example, the terminal device 120 sends the measured information to the terminal device 110, and the terminal device 110 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0219] For another example, the terminal device 120 sends the measured information to the positioning management device 130, and the positioning management device 130 determines the position and / or posture of the terminal device 110 according to the received measurement information.

[0220] Figure 2 2 is a schematic diagram of an application scenario 200 involved in this application. Figure 2 As shown, the application scenario 200 mainly involves a cellular positioning scenario, and the application scenario 200 may include a terminal device 210, a network device 220, and a positioning management device 230. Among them, the terminal device 210 may be a terminal device to be positioned, and the network device 220 may be used as an anchor device (i.e., the location of the network device 220 is known). In this positioning scenario, the terminal device 210 and the network device 220 may be positioned through a cellular communication interface (i.e., a Uu interface).

[0221] In a possible implementation, the terminal device 210 has at least two antennas, and the network device 220 also has at least two antennas. The network device 220 sends a reference signal to the terminal device 210 on at least two antennas, and the terminal device 210 receives the reference signal on at least two antennas and completes the measurement of the reference signal. The terminal device 210 can send the measured information to the positioning management device 230, and the positioning management device 230 determines the position and / or posture of the terminal device 210 according to the received measurement information. The terminal device 210 can also determine the position and / or posture of the terminal device 210 according to the measured information. The terminal device 210 can also send the measured information to the network device 220, and the network device 220 can determine the position and / or posture of the terminal device 210 according to the received measurement information.

[0222] In a possible implementation, the terminal device 210 has at least two antennas, and the network device 220 may be composed of at least two network devices. The at least two network devices included in the network device 220 respectively send reference signals to the terminal device 210 on their own antennas, and the terminal device 210 may receive the reference signals on different antennas and complete the measurement of the reference signals. The terminal device 210 may send the measured information to the positioning management device 230, and the positioning management device 230 determines the position and / or posture of the terminal device 210 according to the received measurement information. The terminal device 210 may also determine the position and / or posture of the terminal device 210 according to the measured information. The terminal device 210 may also send the measured information to the network device 220, and the network device 220 may determine the position and / or posture of the terminal device 210 according to the received measurement information.

[0223] In a possible implementation, the terminal device 210 has at least two antennas, and the network device 220 also has at least two antennas. The terminal device 210 sends a reference signal to the network device 220 on at least two antennas, and the network device 220 receives the reference signal on at least two antennas and completes the measurement of the reference signal. The network device 220 can send the measured information to the positioning management device 230, and the positioning management device 230 determines the position and / or posture of the terminal device 210 according to the received measurement information. The network device 220 can also determine the position and / or posture of the terminal device 210 according to the measured information. The network device 220 can also send the measured information to the terminal device 210, and the network device 220 can determine the position and / or posture of the terminal device 210 according to the received measurement information.

[0224] In a possible implementation, the terminal device 210 has at least two antennas, and the network device 220 may be composed of at least two network devices. The terminal device 210 sends a reference signal to the network device 220 on at least two antennas, and the at least two network devices included in the network device 220 receive the reference signal on the same antenna and complete the measurement of the reference signal. The network device 220 may send the measured information to the positioning management device 230, and the positioning management device 230 determines the position and / or posture of the terminal device 210 according to the received measurement information. The network device 220 may also determine the position and / or posture of the terminal device 210 according to the measured information. The network device 220 may also send the measured information to the terminal device 210, and the network device 220 may determine the position and / or posture of the terminal device 210 according to the received measurement information.

[0225] In a possible implementation, the terminal device 210 has at least two antennas, and the network device 220 has only one antenna. The terminal device 210 sends a reference signal to the network device 220 on at least two antennas, and the network device 220 receives the reference signal on the same antenna and completes the measurement of the reference signal. The network device 220 can send the measured information to the positioning management device 230, and the positioning management device 230 determines the position and / or posture of the terminal device 210 according to the received measurement information. The network device 220 can also determine the position and / or posture of the terminal device 210 according to the measured information. The network device 220 can also send the measured information to the terminal device 210, and the network device 220 can determine the position and / or posture of the terminal device 210 according to the received measurement information.

[0226] It should be understood that Figure 1 and Figure 2The multiple antennas involved in each device may be physical antennas at multiple different positions on the device, or may be virtual antennas formed by the movement of a certain antenna on the device, or a combination of the two, and this application does not limit this.

[0227] also, Figure 1 and Figure 2 The application scenarios shown are only exemplary and should not impose any limitation on the present application. The embodiments of the present application can be applied to any communication scenario in which a transmitting device and a receiving device communicate with each other.

[0228] In order to facilitate a better understanding of the technical solution of the present application, some related technologies involved in the technical solution of the present application are introduced.

[0229] 1. Reference signal

[0230] A reference signal refers to a physical signal that carries a sequence and is sent to achieve a specific function. In this application, the reference signal (RS) involved is a positioning reference signal (PRS), such as a sidelink positioning reference signal (SL-PRS or SLPRS or SL PRS). RS is a physical signal generated by mapping a specific sequence to the corresponding time-frequency resources according to the pre-transmitted resource mapping method.

[0231] 2. Number of transmissions and reservations

[0232] Number of transmissions: refers to the number of times the same signal (such as a reference signal) is sent, that is, the number of times it is sent repeatedly.

[0233] Reservation: In a time domain unit (such as a time slot, for distinction, referred to as time domain unit #1), the indication information of the resources of the reference signal in time domain unit #1 is sent, and the time domain and / or frequency domain resource position of the reserved resources for this reference signal in at least one time domain unit (such as a time slot, for distinction, referred to as time domain unit #2) can also be indicated. Optionally, time domain unit #2 is after time domain unit #1. Optionally, the total number of transmissions and reservations including time domain unit #1 and at least one time domain unit #2 can be indicated using the maximum number of reservations (MaxNumPerReserve).

[0234] As an example, the relationship between transmission (or retransmission) and reservation:

[0235] Optionally, the transmission on the time domain unit #1 and the retransmission on the subsequent time domain unit (such as a time slot) means that the same parameter signal is determined to be sent multiple times in succession;

[0236] The reservation on at least one time domain unit #2 indicated on time domain unit #1 is a resource reserved for future transmission. The sending device may transmit on time domain unit #2 or may not transmit on time domain unit #2, but this indication information can at least be used to exclude the use of resources when the receiving device selects resources.

[0237] Optionally, the transmission on the time domain unit #1 may be an initial transmission or a retransmission of a reference signal, which is not limited in the present application.

[0238] 3. Time and frequency resources

[0239] In this application, data or information can be carried by time-frequency resources, which can also be called transmission resources.

[0240] In the time domain, the time-frequency resources may include one or more time domain units (or, may also be referred to as time units). A time domain unit may be a symbol, or a mini-slot, or a slot, or a partial slot, or a subframe, or a radio frame, and so on.

[0241] In the frequency domain, time-frequency resources may include one or more frequency domain units. A frequency domain unit may be a resource element (RE), or a resource block (RB), or a subchannel, or a resource pool, or a bandwidth, or a bandwidth part (BWP), or a carrier, or a channel, or an interlace RB, etc.

[0242] In the present application, as an example, a time slot is the most basic time domain resource unit for one transmission. Optionally, a time slot includes: a full time slot, a mini time slot, a partial time slot, or a sub-time slot consisting of one or more OFDM symbols. Optionally, a time slot can also be a set of one or more symbols. For example, a time slot can also include a set of one or more OFDM symbols, for example, the number of the one or more OFDM symbols is 1, 2, 3, 4, 6, 7, 12 or 14, etc.

[0243] In addition, the duration of a time slot can be related to the subcarrier spacing. For example, when the subcarrier spacing is 15kHz, the duration of a time slot is 1 millisecond (ms); when the subcarrier spacing is 30kHz, the duration of a time slot is 0.5ms; when the subcarrier spacing is 60kHz, the duration of a time slot is 0.25ms. Similarly, when the subcarrier spacing is 15*2 u The length of a time slot is 2 -u ms, u=0,1,2,…and other integers.

[0244] For the convenience of description, the time slot referred to in the present application may include a time slot, a mini time slot, or any one of a partial time slot and a complete time slot.

[0245] 4. Comb

[0246] When the signal is mapped to the corresponding symbol, a reference signal is mapped to every N resources on the corresponding frequency domain resources, and no reference signal is mapped to the other N-1 resources. This mapping method of frequency domain resources is called comb teeth. The value of N in the comb teeth is called the size of the comb teeth. In this application, the size of the comb teeth can also be called Comb-N.

[0247] Optionally, in a frequency domain bandwidth of a certain size, the comb teeth can also be described as: the resources in each symbol are Y REs in Y×N REs, there is a reference signal in every N REs, Y is a number greater than zero, and N is a positive integer. In this way, the N REs can be used by different communication devices respectively.

[0248] Optionally, assuming that there are K PRBs on the frequency domain bandwidth, the size of Y is: Nre_rb*K / N, where Nre_rb represents the number of REs in a PRB, for example, Nre_rb = 12. As an example, the value of K is determined by the bandwidth of the frequency domain resource where the reference signal is located, such as the bandwidth of the resource pool, the bandwidth of the carrier, the bandwidth of the BWP, etc.

[0249] Optionally, for the reference signal in the comb state, from the frequency domain point of view, there are N orthogonal frequency domain resources for the reference signal. Among them, the N orthogonal frequency domain resources can also be referred to as a comb offset (Comb offset). In the present application, the comb offset can also be referred to as a frequency domain comb resource element offset (comb RE offset), a resource element offset value (REoffset), an offset value, etc. The value corresponding to the comb offset can be [0, 1, ..., N-1], or [1, 2, ..., N]. When the reference signal is mapped in one of the N REs, there can be N different mapping positions of the frequency domain resources of the reference signal, that is, N different comb offsets.

[0250] Figure 3is a schematic diagram of the resources occupied by the downlink positioning reference signal. Figure 3 As shown, the time-frequency resources occupied by the downlink positioning reference signal are mapped in a comb-tooth shape. Figure 3 The time-frequency mapping patterns of the downlink positioning reference signal when the comb size is 2, 4, 6 and 12 are shown respectively. In the figure, one small square represents one RE, and the shaded part represents the RE occupied by the SL-PRS. For example, when the comb size is 2 (Comb-2), on each symbol, a device can map one downlink positioning reference signal on every 2 REs. In other words, when the comb size is 2, the mapping interval of the downlink positioning reference signal in the frequency domain is 2. Similarly, when the comb size is 4 (Comb-4), on each symbol, one downlink positioning reference signal is mapped on every 4 REs, and the mapping interval of the downlink positioning reference signal in the frequency domain is 4. When the comb size is 6 (Comb-6), on each symbol, one downlink positioning reference signal is mapped on every 6 REs, and the mapping interval of the downlink positioning reference signal in the frequency domain is 6. When the comb tooth size is 12 (Comb-12), in each symbol, a downlink positioning reference signal is mapped to every 12 REs, and the mapping interval of the downlink positioning reference signal in the frequency domain is 12.

[0251] Optionally, in the case where there are 106 PRBs in the frequency domain bandwidth, for Comb-2, Y=2*106, and for Comb-3, Y=3*106.

[0252] Figure 4 It is a schematic diagram of the resources occupied by the uplink positioning reference signal, that is, a schematic diagram of the time-frequency pattern of the SL-PRS. In the figure, one small square represents one RE, the shaded part represents the RE occupied by the SL-PRS, the horizontal direction represents the time domain (such as symbol), and the vertical direction represents the frequency domain (such as RE).

[0253] Figure 4 (a) shows the time-frequency mapping pattern of SL-PRS when the comb size is 2 (or the frequency domain interval is 2) and occupies 1 symbol.

[0254] Figure 4 (b) shows the time-frequency mapping pattern of SL-PRS when the comb size is 2 and occupies 2 symbols.

[0255] Figure 4 (c) shows the time-frequency mapping pattern of SL-PRS when the comb size is 4 and occupies 2 symbols.

[0256] Figure 4 (d) shows the time-frequency mapping pattern of SL-PRS when the comb size is 2 and occupies 4 symbols.

[0257] Figure 4 (e) shows the time-frequency mapping pattern of SL-PRS when the comb size is 4 and occupies 4 symbols.

[0258] Figure 4 (f) shows the time-frequency mapping pattern of SL-PRS when the comb size is 8 and occupies 4 symbols.

[0259] Figure 4 (g) shows the time-frequency mapping pattern of SL-PRS when the comb size is 4 and occupies 8 symbols.

[0260] Figure 4 (h) shows the time-frequency mapping pattern of SL-PRS when the comb size is 8 and occupies 8 symbols.

[0261] Figure 4 (i) shows the time-frequency mapping pattern of SL-PRS when the comb size is 4 and occupies 12 symbols.

[0262] Figure 4 (j) shows the time-frequency mapping pattern of SL-PRS when the comb size is 8 and occupies 12 symbols.

[0263] Among them, the frequency domain interval value N for sending SL-PRS comb This means that one SL-PRS is placed in every N REs in the frequency domain, and no signal is placed in the other N-1 REs. Figure 4 In (a), (b), and (d), one SL-PRS is placed every 2 REs in the frequency domain, so the frequency domain spacing is 2. Figure 4 In (c), (e), (g), and (i), one SL-PRS is placed every 4 REs in the frequency domain, so the frequency domain spacing is 4. Figure 4 In (f), (h), and (j), one SL-PRS is placed every 8 REs in the frequency domain, so the frequency domain interval is 8. It should be understood that in this application, the frequency domain interval value N for sending SL-PRS is comb It can also be understood as comb teeth or comb tooth size, etc., with K TC Or N represents.

[0264] In addition, if the resources occupied by a certain message are continuous in the frequency domain, it can be said that its frequency domain interval value is 1. For example, for PSSCH, it is continuous in the frequency domain, so its frequency domain interval value is 1.

[0265] 5. SL time slot structure

[0266] Figure 5 and Figure 6 Two time slot structures in SL are shown. Figure 5 and Figure 6 As shown, the time slot structure may include: time domain resources occupied by the channel carried by the demodulation reference signal (DMRS), time domain resources occupied by the physical sidelink control channel (PSCCH), time domain resources occupied by the physical sidelink shared channel (PSSCH), physical sidelink feedback channel (PSFCH), and time domain resources processed by automatic gain control (AGC) and empty symbols (G).

[0267] The null symbol refers to a guard period (GP) or a guard symbol. The null symbol can be used for transceiver switching, beam scanning, RF or antenna switching, etc. The null symbol can be located in the middle of a time slot or at the last symbol of a time slot, and this application does not limit this.

[0268] In the present application, the last symbol of the time slot is taken as an example for explanation. It can be understood that the time slot may not include the last null symbol.

[0269] exist Figure 5 and Figure 6 In, l d Indicates the total number of symbols used to transmit PSCCH and related PSCCH. Figure 5 As shown, d Indicates the total number of symbols in the time slot except the G symbol, i.e. l d =(number of AGC symbols + number of DMRS symbols + number of PSSCH symbols + number of PSCCH symbols). Figure 6 In, l d Indicates the total number of symbols in the time slot excluding G symbols and PSFCH symbols, i.e. l d =(number of AGC symbols+number of DMRS symbols+number of PSSCH symbols+number of PSCCH symbols) Numbers 0 to 13 represent the numbers of the symbols in the time slot.

[0270] Optionally, in the present application, the AGC symbol is a symbol used by a receiver for automatic gain control. From the perspective of a transmitting device, what is transmitted on the AGC symbol may be a reference signal or a copy of a symbol adjacent to and following the AGC symbol.

[0271] from Figure 5 and Figure 6 It can be seen that the number of PSSCH symbols actually available varies in different scenarios. When transmitting SL-PRS, the number of symbols available for SL-PRS is generally a subset of the number of symbols available for PSSCH. Therefore, the number of symbols available for SLPRS also varies in different scenarios.

[0272] In view of this, the present application proposes a solution that can establish a relationship between SL-PRS resources and SL-PRS resource identifiers, so that the SL-PRS resources can be determined and indicated, which is applicable to various scenarios.

[0273] It should be noted that in this application, "indication" may include direct indication, indirect indication, explicit indication, and implicit indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0274] In the present application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. In addition, the information to be indicated can be sent as a whole, or it can be divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different.

[0275] It should also be noted that, in the present application, "configuration" can be a network device configuration, or it can be a preconfiguration, or it can be predefined, such as a standard predefined.

[0276] The following will describe in detail the method provided by the embodiment of the present application in conjunction with the accompanying drawings. The embodiment provided by the present application can be applied to the above Figure 1 or Figure 2 In the scenario shown, no limitation is given.

[0277] Figure 7 It is a schematic diagram of a method 700 provided in an embodiment of the present application. Figure 7 The illustrated method 700 may include the following steps.

[0278] 701. A first communication device obtains an identifier of a first resource, where the first resource is used to transmit a reference signal. The identifier of the first resource is determined based on at least one of the following: the length of the time domain resource that can be used to transmit the reference signal, the starting position of the time domain resource used to transmit the reference signal, and the length of the time domain resource used to transmit the reference signal.

[0279] The reference signal may be, for example, a sidelink reference signal. As an example, the reference signal may be a sidelink positioning reference signal (SL-PRS), or the reference signal may be a sidelink beam management reference signal.

[0280] The identifier of the first resource may be used to identify (or indicate, or determine) the first resource. In other words, the location of the first resource may be known based on the identifier of the first resource.

[0281] The first resource may be part of the resources in a time slot, such as part of the symbols in a time slot.

[0282] Figure 8 Schematic diagram of the time slot structure applicable to the embodiment of the present application. Figure 8 As shown, assuming that the reference signal is SL-PRS, the time domain resources (such as symbols) used to transmit SL-PRS are part of the time domain resources (such as 2 symbols) in a time slot.

[0283] Optionally, the first resource may be a continuous resource, such as a plurality of continuous symbols in a time slot. Figure 8 For example, the time domain resources used to transmit the SL-PRS (ie, the first resources) in a time slot may be continuous, such as 2 consecutive symbols.

[0284] Optionally, the first communication device sends at least one of the following in the time slot where the first resource is located: PSCCH, PSSCH, AGC. Figure 8 For example, in one time slot, the first communication device can send SL-PRS, PSSCH, PSCCH, AGC, and DMRS.

[0285] Further optionally, the time domain resources of SL-PRS are located after the time domain resources of PSCCH, such as Figure 8As shown. Because PSCCH can carry control information, such as SCI, SCI can be used to indicate the transmission parameters of SL-PRS, for example: the transmission parameters may include one or more of the following information: time domain resource indication information of SL-PRS, frequency domain resource indication information of SL-PRS, priority of SL-PRS, reserved period indication information of SL-PRS, source identification indication information corresponding to SL-PRS, destination identification indication information corresponding to SL-PRS, etc. In this way, for the receiving end, the relevant information of SL-PRS can be obtained according to the SCI received in the previous symbol, and then the SL-PRS can be accurately received.

[0286] Further optionally, the time domain resources of the AGC are located before the time domain resources of the PSCCH, the time domain resources of the PSSCH, and the time domain resources of the SL-PRS. Figure 8 As shown, the AGC symbol precedes the symbols of other signals or information.

[0287] The AGC symbol is located before the symbols of other signals or information, which makes it easier for the receiving end (such as the second communication device) to perform AGC processing as soon as possible. AGC processing can be understood as the receiving end performing a receiving gain adjustment. For example, when the receiving end is performing receiving detection, it is necessary to adjust the receiving gain of the information entering the baseband from the RF front end so that the amplitude of the signal input to the analog to digital converter (ADC) module is just within the quantization range of the ADC, thereby maximizing the signal-to-noise ratio of the received signal in the baseband and obtaining the best receiving performance.

[0288] The specific method for determining the identifier of the first resource will be described in detail later.

[0289] 702. A first communication device sends a reference signal using a first resource.

[0290] The first communication device may be a terminal device or a component of a terminal device (e.g., a chip or a circuit), or the first communication device may be a network device or a component of a network device (e.g., a chip or a circuit). The second communication device may be a terminal device or a component of a terminal device (e.g., a chip or a circuit), or the second communication device may be a network device or a component of a network device (e.g., a chip or a circuit). In a possible implementation, the first communication device and the second communication device are terminal devices, and accordingly, the reference signal may be a sidelink reference signal.

[0291] Based on the above technical solution, the first communication device can obtain the identifier of the first resource, and then determine the first resource according to the identifier of the first resource, and then use the first resource to send a reference signal. Among them, the identifier of the first resource can be determined according to one or more of the length of the time domain resource that can be used to transmit the reference signal, the starting position of the time domain resource used to transmit the reference signal, and the length of the time domain resource used to transmit the reference signal. In this way, for example, an association can be established between the identifier of the resource used to transmit the reference signal and the length of the starting position of the resource, or a relationship can be established between the identifier of the resource used to transmit the reference signal and the length of the time domain resource that can be used to transmit the reference signal, so that the resource of the reference signal can be determined and indicated. This method can be applicable to various communication scenarios.

[0292] For the convenience of description, the following describes the solution of the embodiment of the present application by taking the reference signal as SL-PRS as an example. Accordingly, the first resource is used to transmit the SL-PRS.

[0293] Optionally, in step 701, the first communication device obtains the identifier of the first resource, including but not limited to any of the following implementations.

[0294] In a first possible implementation manner, the first communication device determines an identifier of the first resource.

[0295] Based on this method, the first communication device can determine the identifier of the first resource by itself, so that it can select appropriate resources to transmit SL-PRS according to actual communication conditions, which is more flexible.

[0296] In a second possible implementation manner, the first communication device receives indication information #1, where the indication information #1 indicates an identifier of the first resource.

[0297] For example, the first communication device receives indication information #1 from the network device.

[0298] The indication information #1 may directly indicate the identifier of the first resource, or may indicate identifiers of multiple resources, including the identifier of the first resource. Two examples are introduced below, taking the example of the network device sending the indication information #1 to the first communication device.

[0299] Example 1: The first communication device receives indication information #1 from a network device, and the indication information #1 directly indicates an identifier of a first resource. For example, the indication information #1 includes the identifier of the first resource.

[0300] Based on this method, the network device can determine the identifier of the first resource and indicate the identifier of the first resource to the first communication device. The first communication device can directly obtain the identifier of the first resource based on the indication information #1, and then determine the first resource. This can reduce the amount of calculation of the first communication device.

[0301] Example 2: A first communication device receives indication information #1 from a network device, where the indication information #1 indicates identifiers of multiple resources, where the identifiers of the multiple resources include an identifier of a first resource. For example, the indication information #1 includes identifiers of multiple resources.

[0302] The first communication device may determine the identifier of the first resource from the identifiers of the plurality of resources.

[0303] As an example, the first communication device determines the identifier of the first resource based on multiple resource identifiers, including: the first communication device determines the identifier of the first resource based on multiple resource identifiers, and at least one of the following: a time domain resource for transmitting an SL reference signal, a time domain resource for transmitting SL feedback information, and a time domain resource for transmitting PSSCH. Among them, the SL reference signal represents a reference signal other than SL-PRS. For example, the SL reference signal includes but is not limited to: a phase tracking reference signal (phase-tracking-reference signal, PT-RS), a channel state information-reference signal (channel state information-reference signal, CSI-RS), a beam management reference signal (beam management-reference signal, BM-RS), or DMRS, etc.

[0304] For example, taking a time slot as an example, the first communication device determines multiple time domain resources (such as multiple symbols) based on the identifiers of multiple resources, and then excludes the time domain resources (such as symbols) used to transmit the SL reference signal, the time domain resources (such as symbols) used to transmit the SL feedback information, and the time domain resources (such as symbols) used to transmit the PSSCH from the multiple time domain resources. The remaining time domain resources can be used as the first resources to transmit the SL-PRS.

[0305] To give another example, assuming that the first resource is a continuous resource, taking a time slot as an example, the first communication device determines multiple time domain resources (such as multiple symbols) based on the identifiers of multiple resources, and then excludes the following resources: time domain resources (such as symbols) used to transmit SL reference signals, time domain resources (such as symbols) used to transmit SL feedback information, time domain resources (such as symbols) used to transmit PSSCH, and discontinuous time domain resources in the multiple time domain resources. The remaining time domain resources can be used as the first resource to transmit SL-PRS.

[0306] For another example, assuming that the identifiers of multiple resources include identifiers of k candidate resources, k is an integer greater than 1, the first communication device can determine the k candidate resources based on the identifiers of the k candidate resources, and the first communication device determines the first resource based on the k candidate resources and the time domain resources for transmitting the SL reference signal (such as the time domain resources for transmitting PT-RS), and then determines the identifier of the first resource. Taking SL-PRS as an example, the candidate resources are the resources for transmitting SL-PRS. Specifically, the network device configures k candidate resources for SL-PRS and notifies the first communication device (such as notifying the first communication device through indication information #1); the first communication device selects a candidate resource that does not overlap with PT-RS based on the k candidate resources to transmit SL-PRS. Regarding this scheme, the following is combined with Fig.12 Detailed description.

[0307] Based on this approach, the network device can determine multiple resource identifiers, and the first communication device selects a suitable resource identifier according to actual communication conditions, which not only reduces the amount of calculation of the first communication device but is also more flexible.

[0308] For example, the indication information #1 may also be other information, and the other information has an association relationship with the identifier of the first resource, so that the first communication device can determine the identifier of the first resource based on the other information and the association relationship.

[0309] The following takes SL-PRS as an example to introduce a method for determining the identifier of the first resource.

[0310] The identifier of the first resource is determined based on at least one of the following: the length of the time domain resource that can be used to transmit the SL-PRS, the starting position of the time domain resource used to transmit the SL-PRS, and the length of the time domain resource used to transmit the SL-PRS. The following describes several schemes by taking the first communication device determining the identifier of the first resource as an example. It can be understood that the method for determining the identifier of the first resource by other devices, such as network equipment, can refer to the following scheme, which will not be repeated here.

[0311] In scheme A, the identifier of the first resource is determined according to the length of the time domain resource that can be used to transmit the SL-PRS.

[0312] The following first introduces the length of the time domain resources that can be used to transmit SL-PRS.

[0313] In the embodiments of the present application, unless otherwise specified, the length of the time domain resources used to transmit the signal may be: the length of the time domain resources used to transmit the signal in a time domain unit (such as a time slot), such as the total number of symbols used to transmit the signal in a time slot (referred to as the number of symbols). For example, the length of the time domain resources used to transmit SL-PRS may be the number of symbols used to transmit SL-PRS in a time slot; for another example, the length of the time domain resources used to transmit PSSCH may be the number of symbols used to transmit PSSCH in a time slot; for another example, the length of the time domain resources used to transmit PSFCH may be the number of symbols used to transmit PSFCH in a time slot; for another example, the length of the time domain resources used to transmit DMRS may be the number of symbols used to transmit DMRS in a time slot. Other similarities will not be repeated later.

[0314] The length of the time domain resources that can be used to transmit the SL-PRS represents the length of the time domain resources that can be used to transmit the SL-PRS, for example, the number of symbols that can be used to transmit the SL-PRS in a time slot. In other words, the length of the time domain resources actually used to transmit the SL-PRS is less than or equal to the length of the time domain resources that can be used to transmit the SL-PRS; in other words, the time domain resources actually used to transmit the SL-PRS are selected from the time domain resources that can be used to transmit the SL-PRS.

[0315] The length of the time domain resources that can be used to transmit the SL-PRS is determined based on the length of the time domain resources that can be used to transmit other signals or information.

[0316] For example, in a time slot, the time domain resources that can be used to transmit SL-PRS refer to: the time domain resources used to transmit PSSCH in the time slot, excluding the time domain resources used to transmit other signals, channels or information. Among them, other signals or channels may include but are not limited to at least one of the following: PSFCH, PSCCH, other reference signals, etc. Among them, other reference signals include but are not limited to: PT-RS, CSI-RS, BM-RS, or DMRS.

[0317] For another example, in a time slot, the time domain resources that can be used to transmit SL-PRS refer to: the time domain resources used for side transmission in the time slot, excluding the time domain resources used to transmit other signals, channels or information. Among them, other signals or information may include but are not limited to at least one of the following: AGC, GAP, PSFCH, PSCCH, other reference signals, etc. Among them, other reference signals include but are not limited to: PT-RS, CSI-RS, BM-RS, or DMRS.

[0318] In a possible implementation, the length of the time domain resources that can be used to transmit SL-PRS is determined based on at least one of the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, the length of the time domain resources used to transmit PSFCH, the length of the time domain resources used to transmit DMRS, the length of the time domain resources used to transmit AGC, the length of the time domain resources used to transmit GAP, and the length of the time domain resources used to transmit other reference signals. For example, in a time slot, the time domain resources that can be used to transmit SL-PRS do not include at least one of the following: the time domain resources used to transmit PSSCH in the time slot, the time domain resources used to transmit PSCCH in the time slot, the time domain resources used to transmit PSFCH in the time slot, the time domain resources used to transmit DMRS in the time slot, the time domain resources used to transmit AGC in the time slot, the time domain resources used to transmit GAP in the time slot, and the time domain resources used to transmit other reference signals in the time slot. Among them, other reference signals include but are not limited to: PT-RS, CSI-RS, BM-RS, or DMRS. In addition, those skilled in the art will know that the time domain resources used to transmit DMRS are related to the DMRS pattern, and therefore, the length of the time domain resources that can be used to transmit SL-PRS is also related to the DMRS pattern. In addition, as in step 710, the identification of the first resource is determined based on at least one of the following: the length of the time domain resources that can be used to transmit the reference signal, the starting position of the time domain resources used to transmit the reference signal, and the length of the time domain resources used to transmit the reference signal. Therefore, as an example, the identification of the first resource is determined based on at least one of the following: the time domain resources used to transmit PSSCH, the time domain resources used to transmit PSCCH, the DMRS pattern, and the length of the time domain resources used to transmit SL-PRS. Detailed description is provided later.

[0319] For simplicity, the length of the time domain resource that can be used to transmit the SL-PRS is referred to as Ma. This is explained below with reference to some formulas.

[0320] In the following formula, the meaning of each parameter is as follows.

[0321] 1) Ma represents the length of the time domain resource that can be used to transmit the SL-PRS. Taking a time slot as an example, Ma represents the number of symbols that can be used to transmit the SL-PRS in a time slot.

[0322] 2)l d Indicates the length of the time domain resource used to transmit PSSCH. Taking a time slot as an example, l d Indicates the number of symbols used to transmit PSSCH in a time slot.

[0323] Optionally, l d = l SL –lPSFCH Among them, l SL Indicates the length of the time domain resource used for sideline transmission, l PSFCH Indicates the length of the time domain resource used to transmit PSFCH. Based on this, we can know that l d Indicates the number of symbols used to transmit PSSCH in a time slot excluding PSFCH symbols.

[0324] 3)l d ' represents the sideline symbol length (such as the symbol length indicated by the parameter sl-LengthSymbols-r16) minus 1. d 'It can be configured (such as network device configuration), or it can be predefined or preconfigured, without limitation.

[0325] Taking a time slot as an example, if the time slot includes a PSFCH symbol, then l d The number of symbols excluding PSFCH, l d 'Including the number of PSFCH symbols. Figure 6 For example, there are 14 symbols in the time slot, of which 3 symbols are used to transmit PSFCH, then l d =10, l d '=13.

[0326] 4)l PSCCH Indicates the length of the time domain resource used to transmit PSCCH. Taking a time slot as an example, l PSCCH Indicates the number of symbols used to transmit PSCCH in a time slot. PSCCH It can be configured (such as a network device configuration), or it can be predefined or preconfigured, without limitation. In addition, as an example, the l PSCCH It may be instructed by other communication devices (such as network equipment or other terminal equipment).

[0327] 5)l PSFCH Indicates the length of the time domain resource used to transmit PSFCH. Taking a time slot as an example, l PSFCH Indicates the number of symbols used to transmit PSFCH in a time slot. As an example, l PSFCH The value of is any of the following: 0, 1, 2, or 3.

[0328] 6)l DMRS Indicates the length of the time domain resource used to transmit DMRS. Taking a time slot as an example, l DMRS Indicates the number of symbols used to transmit DMRS in a time slot.

[0329] In scheme 1, Ma is determined according to the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, and the length of the time domain resources used to transmit PSFCH.

[0330] Based on this solution, in a possible implementation, Ma satisfies Formula 1 or Formula 2.

[0331] Ma=l d -l PSCCH –X1

[0332] Formula 1

[0333] Ma=l d '-l PSCCH -l PSFCH –X1

[0334] Formula 2: Where X1 is a constant or a configured parameter.

[0335] Optionally, the resource of X1 is related to the type of resource pool. The types of resource pools include: shared resource pool and dedicated resource pool. In this application, a shared resource pool refers to a resource pool that can be used for both SL-PRS and PSSCH transmission; a dedicated resource pool refers to a resource pool that can transmit PSSCH but not SLPRS;

[0336] For example, for a shared resource pool, the value of X1 is 1. For another example, for a dedicated resource pool, the value of X1 is 2.

[0337] Based on the above implementation method, when determining the time domain resources (such as the number of symbols) that can be used to transmit SL-PRS in a time slot, the time domain resources used to transmit PSCCH and the time domain resources used to transmit PSFCH in the time slot can be removed, and through the design of constant X1, the time domain resources used to transmit other signals (such as AGC, DMRS) can be removed.

[0338] The value of X1 can be any of the following: 0, 1, 2 or 3. d The value of (or different ranges of l d ) can correspond to different values ​​of X1.

[0339] Example 1: The value of X1 is 2 or 3.

[0340] For example, if 9≤l d ≤13, then X1=3, that is, Ma=l d -l PSCCH –3, or, Ma = l d '-l PSCCH -l PSFCH –3.

[0341] For another example, if 6≤l d ≤8, then X1=2, that is, Ma=l d -l PSCCH –2, or, Ma = l d '-l PSCCH -l PSFCH –2.

[0342] In the above example, by designing the constant X1, the time domain resources used to transmit other signals (such as AGC, DMRS) can be removed. In this way, Ma can be determined more accurately and the signaling overhead caused by notifying Ma is reduced.

[0343] Example 2: The value of X1 is 0 or 1.

[0344] In the above example, by designing the constant X1, the time domain resources used to transmit other signals (such as AGC) can be removed. In this way, there is no need to distinguish different scenarios, and Ma is determined in a unified manner, which reduces the amount of calculation.

[0345] Among them, l PSFCH ≥0.

[0346] For example, if there is no symbol in the time slot for transmitting PSFCH, l PSFCH =0.

[0347] For another example, if there are symbols in the time slot for transmitting PSFCH, PSFCH >0. As an example, l PSFCH =2 or 3.

[0348] by Figure 5 Take (1) in the example, l d =13, assuming X1=3, according to formula 1, Ma=l d -l PSCCH –X1=13-2-3=8.

[0349] For example, Figure 5 Take (2) in the example, l d =6, assuming X1 = 2, according to formula 1, Ma = l d -l PSCCH –X1=6-2-2=2.

[0350] It can be understood that the above formula 1 and formula 2 are exemplary explanations, and the modified formulas belonging to the above formula 1 and formula 2 are applicable to the present application. For example, the above formula 1 can be replaced by: Ma=l d -l PSCCH –X1-X1a, or, Formula 2 can be replaced by: Ma=l d '-l PSCCH -lPSFCH –X1a. The value of X1a may be determined by the transmitting end (such as the first communication device), or may be determined by other devices, or may be indicated by configuration information, or may be predefined and not limited. By designing X1a, it can be used to limit the number of symbols for sending PSSCH on a resource pool (such as a shared resource pool), or the symbols reserved for the minimum number of symbols. In this way, the number of available SL-PRS symbols can be accurately determined in the time slot with PSSCH transmission, thereby further reducing the overhead of signaling indication.

[0351] In scheme 2, Ma is determined according to the following: the length of the time domain resources used to transmit PSSCH, the length of the time domain resources used to transmit PSCCH, the length of the time domain resources used to transmit PSFCH, and the length of the time domain resources used to transmit DMRS.

[0352] In a possible implementation, Ma satisfies Formula 3 or Formula 4.

[0353] Ma=l d -l PSCCH -l DMRS –X2

[0354] Formula 3

[0355] Ma=l d '-l PSCCH -l DMRS -l PSFCH –X2

[0356] Formula 4: Where X2 is a constant.

[0357] Based on the above implementation, when determining the time domain resources (such as the number of symbols) that can be used to transmit SL-PRS in a time slot, the time domain resources used to transmit PSCCH, the time domain resources used to transmit PSFCH, and the time domain resources used to transmit DMRS in the time slot can be removed, and through the design of the constant X2, the time domain resources used to transmit other signals (such as AGC) can be removed. In this way, Ma can be determined more accurately and the signaling overhead caused by notifying Ma is reduced.

[0358] As an example, X2=0 or 1.

[0359] As an example, l PSFCH ≥0.

[0360] For example, if there is no symbol in the time slot for transmitting PSFCH, l PSFCH =0.

[0361] For another example, if there are symbols in the time slot for transmitting PSFCH, PSFCH >0. As an example, lPSFCH =2 or 3.

[0362] As an example, l DMRS ≥0.

[0363] For example, if there is no symbol in the time slot for transmitting DMRS, l DMRS =0.

[0364] For another example, if there are symbols in the time slot for transmitting DMRS, DMRS >0. As an example, l PSFCH =Any one of 2, 3, or 4.

[0365] by Figure 5 Take (1) in the example, l d =13, assuming X2 = 1, according to formula 3, Ma = l d -l PSCCH -l DMRS –X3=13-2-2-1=8.

[0366] It can be understood that the above formula 3 and formula 4 are exemplary explanations, and the modified formulas belonging to the above formula 3 and formula 4 are applicable to the present application. For example, the above formula 3 can be replaced by: Ma=l d -l PSCCH -l DMRS –X2-X2a, or, Formula 4 can be replaced by: Ma=l d '-l PSCCH -l DMRS -l PSFCH –X2-X2a. The value of X2a may be determined by the transmitting end (such as the first communication device), or may be determined by other devices, or may be indicated by configuration information, or may be predefined and not limited. By designing X2a, it can be used to limit the number of symbols for sending PSSCH on a resource pool (such as a shared resource pool), or the symbols reserved for the minimum number of symbols. In this way, the number of available SL-PRS symbols can be accurately determined in the time slot with PSSCH transmission, thereby further reducing the overhead of signaling indication.

[0367] In scheme 3, Ma is determined according to the following: the length of the time domain resource used to transmit the PSSCH.

[0368] In a possible implementation, Ma satisfies Formula 5 or Formula 6.

[0369] Ma=l d -X3

[0370] Formula 5

[0371] Ma=l d '-l PSFCH -X3

[0372] Formula 6: Where X3 is a constant.

[0373] As an example, X3=0 or 1.

[0374] Based on the above implementation, the time domain resources (such as the number of symbols) that can be used to transmit SL-PRS in a time slot can be the time domain resources used to transmit PSSCH. In this way, there is no need to distinguish different scenarios, and Ma is determined in a unified manner, which reduces the amount of calculation.

[0375] It can be understood that the above formula 5 and formula 6 are exemplary explanations, and the modified formulas of the above formula 5 and formula 6 are applicable to the present application. For example, the above formula 5 can be replaced by: Ma=l d -X3-X3a, or, Formula 6 can be replaced by: Ma = l d '-l PSFCH -X3-X3a. The value of X3a may be determined by the transmitting end (such as the first communication device), or may be determined by other devices, or may be indicated by configuration information, or may be predefined and not limited. By designing X3a, it can be used to limit the number of symbols for sending PSSCH on a resource pool (such as a shared resource pool), or the symbols reserved for the minimum number of symbols. In this way, the number of available SL-PRS symbols can be accurately determined in the time slot with PSSCH transmission, thereby further reducing the overhead of signaling indication.

[0376] It can be understood that the above three solutions are only examples, and the variations of the above three solutions are applicable to the embodiments of the present application. For example, the time domain resources (such as the number of symbols) of other reference signals are subtracted from the above equations 1 to 6.

[0377] It can also be understood that the above three solutions can be applied to a dedicated resource pool or a shared resource pool.

[0378] The above introduces the relevant schemes for the length of time domain resources that can be used to transmit SL-PRS. Scheme A is introduced below.

[0379] Based on solution A, it can be known that the identifier of the first resource is determined according to the length of the time domain resources that can be used to transmit the SL-PRS.

[0380] Optionally, the identifier of the first resource is obtained by encoding the length of the time domain resource that can be used to transmit the SL-PRS. This approach can avoid indicating some unnecessary identifiers (or states) and can reduce signaling overhead.

[0381] Optionally, the identifier of the first resource is encoded based on the length of the time-domain resources that can be used to transmit SL-PRS, and there is only one frequency-domain offset value (or subcarrier offset value) for each symbol. This method can avoid indicating some unnecessary identifiers (or states) and reduce signaling overhead.

[0382] For example, assuming there are Ma symbols available for SL-PRS transmission in a time slot, it can be encoded according to the symbol lengths of SL-PRS that can be supported.

[0383] Optionally, the identifier of the first resource satisfies any of the following:

[0384] n id = S start ,

[0385] n id = S start + Ma, or

[0386] n id = S start + 2Ma - 1,

[0387] where n id represents the identifier of the first resource, S start represents the starting position of the time-domain resources used to transmit SL-PRS, and Ma represents the length of the time-domain resources that can be used to transmit SL-PRS. As an example, the values of n id expressed in the above three ways can be used to indicate at least two symbol lengths of SL-PRS. For example, different symbol lengths of SL-PRS correspond to different values of n id .

[0388] Taking an example below, based on a specific example, two implementation methods are listed.

[0389] Assume there are three symbol lengths of SL-PRS that can be supported, denoted as M1, M2, M3, and M1 < M2 < M3. As an example, M1 = 1, M2 = 2, M3 = 4.

[0390] For the first possible implementation method, the identifier of the first resource satisfies Equation 7.

[0391] If 0 ≤ n id ≤ Ma - M1, then n id = S start , M = M1

[0392] If Ma - M1 + 1 ≤ n id ≤ 2Ma - M1 - M2 + 1, then n id = S start + Ma, M = M2

[0393] If 2Ma-M1-M2+2≤n id ≤3Ma-M1-M2-M3+2, then n id =S start +2Ma-1,M=M3

[0394] Formula 7

[0395] Among them, n id Represents the symbol index of the first resource in a time slot. start Indicates the starting symbol of SL-PRS in a time slot. M indicates the symbol length of SL-PRS in a time slot.

[0396] Below Figure 5 Take the time slot structure shown in (1) as an example to illustrate.

[0397] Assume that Ma = l d -l PSCCH –X1, and X1=3.

[0398] like Figure 5 As shown in (1), l d =13,Ma=1 d -l PSCCH –X1=13-2-3=8. Based on the above implementation, assuming that the symbol lengths of the supported SL-PRS are: M1=1, M2=2, M3=4, then Ma symbols (i.e., 8 symbols) are encoded, and there are a total of 20 (8+7+5=20) possible identification values. Among them, "8" means: when the number of symbols of the first resource is M1 (i.e., M=1), there are 8 values ​​of the identification; "7" means: when the number of symbols of the first resource is M2 (i.e., M=2), there are 7 values ​​of the identification; "5" means: when the number of symbols of the first resource is M3 (i.e., M=4), there are 5 values ​​of the identification. If the identification of the first resource is indicated by binary bits, then 5 bits can indicate which state (i.e., which identification) is used, reducing signaling overhead.

[0399] Specifically, from Figure 5 As can be seen from (1), the eight symbols are: symbol 4, symbol 5, symbol 6, symbol 7, symbol 8, symbol 9, symbol 11, symbol 12. Assuming that the identifier of the first resource is numbered from 0, the identifier of the first resource may be: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19}.

[0400] If M=M1=1, the identifier value of the first resource may be: {0,1,2,3,4,5,6,7}, where identifier "0" corresponds to symbol 4, identifier "1" corresponds to symbol 5, identifier "2" corresponds to symbol 6, identifier "3" corresponds to symbol 7, identifier "4" corresponds to symbol 8, identifier "5" corresponds to symbol 9, identifier "6" corresponds to symbol 11, and identifier "7" corresponds to symbol 12.

[0401] If M=M2=2, then the identifier value of the first resource may be: {8,9,10,11,12,13,14}, where the identifier "8" corresponds to symbol 4 and symbol 5, the identifier "9" corresponds to symbol 5 and symbol 6, the identifier "10" corresponds to symbol 6 and symbol 7, the identifier "11" corresponds to symbol 7 and symbol 8, the identifier "12" corresponds to symbol 8 and symbol 9, the identifier "13" corresponds to symbol 9 and symbol 11, and the identifier "14" corresponds to symbol 11 and symbol 12.

[0402] If M=M3=4, then the identifier value of the first resource may be: {15, 16, 17, 18, 19}, where the identifier "15" corresponds to symbol 4, symbol 5, symbol 6 and symbol 7, the identifier "16" corresponds to symbol 5, symbol 6, symbol 7 and symbol 8, the identifier "17" corresponds to symbol 6, symbol 7, symbol 8 and symbol 9, the identifier "18" corresponds to symbol 7, symbol 8, symbol 9 and symbol 11, and the identifier "19" corresponds to symbol 8, symbol 9, symbol 11 and symbol 12.

[0403] For example, if the identifier of the first resource indicated by the first communication device is "4" and M is 1, then based on the above correspondence, it can be known that the time domain resource where the SL-PRS is located is symbol 8. For another example, if the identifier of the first resource indicated by the first communication device is "10" and M is 2, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbols 6 and 7. For another example, if the identifier of the first resource indicated by the first communication device is "13" and M is 2, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbols 9 and 11. Assuming that the SL-PRS is transmitted using continuous time domain resources, it can be considered that the symbols 9 and 11 indicated by the identifier of the first resource "13" are invalid values ​​because symbols 9 and 11 are not continuous. For another example, if the identifier of the first resource indicated by the first communication device is "17" and M is 4, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbols 6, symbol 7, symbol 8 and symbol 9.

[0404] In a second possible implementation manner, the identifier of the first resource satisfies Formula 8.

[0405] If 0≤n id ≤Ma-M1-M 1e , then n id =S start , M=M1

[0406] If Ma-M1-M 1e +1≤n id ≤2Ma-M1-M2-M 1e –M 2e +1, then n id =S start +Ma,M=M2

[0407] If 2Ma-M1-M2-M 1e –M 2e +2≤n id ≤3Ma-M1-M2-M3-M 1e –M 2e –M 3e +2, then n id =S start +2Ma-1, M=M3 Formula 8

[0409] Among them, M 1e 、M 2e 、M 3e Respectively represent the identification values ​​that need to be excluded when the symbol length of the SL-PRS is M1, M2, and M3. Among them, the identification value that needs to be excluded can be the identification of the resource occupied by the DMRS. Specifically, when determining the identification of the first resource, the invalid identification value can be directly excluded based on the DMRS pattern used when the first communication device sends the DMRS.

[0410] Below Figure 5 Taking the time slot structure shown in (1) as an example, an example is given to illustrate.

[0411] Assume that Ma = l d -l PSCCH -l DMRS –X2, and X2=1.

[0412] like Figure 5 As shown in (1), l d =13,Ma=1 d -l PSCCH -l DMRS–X3=13-2-2-1=8. Based on the above implementation, assuming that the symbol lengths of the supported SL-PRS are: M1=1, M2=2, M3=4, then Ma symbols (i.e., 8 symbols) are encoded, and there are a total of 17 (8+6+3=17) possible identification values. Among them, "8" means: when the number of symbols of the first resource is M1 (i.e., M=1), there are 8 values ​​of the identification; "6" means: when the number of symbols of the first resource is M2 (i.e., M=2), there are 6 values ​​of the identification; "3" means: when the number of symbols of the first resource is M3 (i.e., M=4), there are 3 values ​​of the identification. If the identification of the first resource is indicated by binary bits, then 5 bits can indicate which state (i.e., which identification) is used, reducing signaling overhead.

[0413] Specifically, from Figure 5 As can be seen from (1), the eight symbols are: symbol 4, symbol 5, symbol 6, symbol 7, symbol 8, symbol 9, symbol 11, symbol 12. Assuming that the identifier of the first resource starts at 0, the identifier of the first resource may be: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}.

[0414] If M=M1=1, the identifier value of the first resource may be: {0,1,2,3,4,5,6,7}, where identifier "0" corresponds to symbol 4, identifier "1" corresponds to symbol 5, identifier "2" corresponds to symbol 6, identifier "3" corresponds to symbol 7, identifier "4" corresponds to symbol 8, identifier "5" corresponds to symbol 9, identifier "6" corresponds to symbol 11, and identifier "7" corresponds to symbol 12.

[0415] If M=M2=2, then the identifier value of the first resource may be: {8,9,10,11,12,13}, where the identifier "8" corresponds to symbol 4 and symbol 5, the identifier "9" corresponds to symbol 5 and symbol 6, the identifier "10" corresponds to symbol 6 and symbol 7, the identifier "11" corresponds to symbol 7 and symbol 8, the identifier "12" corresponds to symbol 8 and symbol 9, and the identifier "13" corresponds to symbol 11 and symbol 12.

[0416] If M=M3=4, then the identifier value of the first resource may be: {14, 15, 16}, where the identifier "14" corresponds to symbol 4, symbol 5, symbol 6, and symbol 7, the identifier "15" corresponds to symbol 5, symbol 6, symbol 7, and symbol 8, and the identifier "16" corresponds to symbol 6, symbol 7, symbol 8, and symbol 9.

[0417] For example, if the identifier of the first resource indicated by the first communication device is "4" and M is 1, then based on the above correspondence, it can be known that the time domain resource where the SL-PRS is located is symbol 8. For another example, if the identifier of the first resource indicated by the first communication device is "10" and M is 2, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbol 6 and symbol 7. For another example, if the identifier of the first resource indicated by the first communication device is "13" and M is 2, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbol 11 and symbol 12. For another example, if the identifier of the first resource indicated by the first communication device is "16" and M is 4, then based on the above correspondence, it can be known that the time domain resources where the SL-PRS is located are symbol 6, symbol 7, symbol 8 and symbol 9.

[0418] Optionally, the first resource is also determined based on at least one of the following: a time domain resource used to transmit a sidelink reference signal, a time domain resource used to transmit sidelink feedback information, and a time domain resource used to transmit a PSSCH.

[0419] A possible implementation method is that in step 701, the first communication device obtains the identifier of the first resource, including: the first communication device obtains the identifiers of N resources by encoding the length of the time domain resources that can be used to transmit SL-PRS, and N is an integer greater than 1; the first communication device determines the identifier of the first resource based on the identifiers of the N resources and a preset rule, and the preset rule indicates that: the first resource is a continuous resource, and / or, the first resource does not include one of the following indications: a time domain resource for transmitting a sidelink reference signal, a time domain resource for transmitting sidelink feedback information, and a time domain resource for transmitting PSSCH.

[0420] Specifically, after the first resource is determined based on the above solution A, invalid ID values ​​(or invalid states) can be excluded.

[0421] Invalid ID values ​​may include, but are not limited to: resources that conflict with other signals and / or discontinuous resources.

[0422] Specifically, after determining the SL-PRS ID corresponding to the combination of the starting position and length of all SL-PRS time domain resources, the first communication device can judge which PSSCH time domain resources will be occupied by other signals according to actual conditions. When determining the resources used by the SL-PRS, the first communication device needs to ensure that the time domain resources of the SL-PRS do not overlap with the time domain resources occupied by other signals, that is, the first communication device avoids the overlap of the time domain resources of the SL-PRS with the time domain resources occupied by other signals by selecting an appropriate SL-PRS ID.

[0423] Among them, other signals include but are not limited to: sidelink reference signal, sidelink feedback information. Among them, the sidelink reference signal represents a reference signal other than SL-PRS, for example, it may include but is not limited to: PT-RS, CSI-RS, BM-RS or DMRS. Among them, the sidelink feedback information includes, for example, PSFCH.

[0424] In another possible implementation, the first resource overlaps with the third resource, and the third resource is used to transmit a sidelink reference signal. Method 700 further includes: using a resource in the third resource that does not overlap with the first resource to transmit the sidelink reference signal. For example, after the first communication device determines the first resource, if part of the first resource overlaps with the third resource, that is, the part of the resource is also used to transmit a sidelink reference signal (such as PT-RS), then at the overlapping position, only SL-PRS is sent, and PT-RS is not sent. Regarding this solution, the following will be combined with Fig.12 Provide detailed explanation.

[0425] For example, the first communication device (or network device) determines the length of the time domain resource that can be used to transmit the SL-PRS based on the length of the time domain resource that can be used to transmit the SL-PRS (eg, d ), the time domain resources for transmitting DMRS, and the length of the time domain resources for transmitting SL-PRS, determine the first resource; if the resources in the first resource overlap with the third resource, then at the overlapping position, the first communication device only sends SL-PRS and does not send PT-RS.

[0426] Solution B: The identifier of the first resource is determined based on the starting position and length of the time domain resource used to transmit the SL-PRS.

[0427] The following first introduces the starting position and length of the time domain resources used to transmit SL-PRS.

[0428] The starting position of the time domain resources used to transmit the SL-PRS may represent a starting symbol used to transmit the SL-PRS in a time slot.

[0429] The length of the time domain resources used to transmit the SL-PRS may represent the number of symbols used to transmit the SL-PRS in a time slot.

[0430] Optionally, the first communication device may acquire the starting position and length of the time domain resources used to transmit the SL-PRS based on the following method.

[0431] In a first possible implementation manner, the first communication device itself determines the starting position and length of the time domain resources used to transmit the SL-PRS.

[0432] Based on this, the first communication device can determine the starting position and length of the time domain resources used to transmit the SL-PRS in a time slot according to the actual communication situation.

[0433] In a second possible implementation, other devices (such as network equipment) send indication information #2 to the first communication device, where the indication information #2 indicates the starting position of the time domain resources used to transmit SL-PRS and / or the length of the time domain resources used to transmit SL-PRS.

[0434] As an example, indication information #2 is carried in SCI.

[0435] In one example, indication information #2 indicates the starting position of the time domain resources used to transmit SL-PRS and the length of the time domain resources used to transmit SL-PRS. Based on this, other devices can indicate the starting position and length of the time domain resources used to transmit SL-PRS to the first communication device.

[0436] In another example, indication information #2 indicates the starting position of the time domain resources used to transmit SL-PRS, and the first communication device itself determines the length of the time domain resources used to transmit SL-PRS. Based on this, other devices can indicate the starting position of the time domain resources used to transmit SL-PRS to the first communication device, and the first communication device can determine the appropriate length according to the actual communication situation and the starting position indicated by other devices.

[0437] In another example, indication information #2 indicates the length of the time domain resources used to transmit the SL-PRS, and the first communication device itself determines the starting position of the time domain resources used to transmit the SL-PRS. Based on this, other devices can indicate the length of the time domain resources used to transmit the SL-PRS to the first communication device, and the first communication device can determine the appropriate starting position according to the actual communication situation and the length indicated by other devices.

[0438] Optionally, the identifier of the first resource is obtained by encoding the starting position and length of the time domain resource used to transmit the SL-PRS. This method avoids complex calculations when indicating the SL-PRS resource, and the resource indication is flexible.

[0439] For example, the value of the identifier of the first resource is N bits, and the N bits include a first bit and a second bit. The first bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the SL-PRS, and the second bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the SL-PRS; or, the second bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the SL-PRS, and the first bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the SL-PRS; or, the identifier of the first resource is obtained by jointly encoding the length of the time domain resource used to transmit the SL-PRS and the starting position of the time domain resource used to transmit the SL-PRS.

[0440] As an example, the first bit is the high bit of the identifier of the first resource, and the second bit is the low bit of the identifier of the first resource. The following takes the first bit as the high bit of the identifier of the first resource and the second bit as the low bit of the identifier of the first resource as an example to introduce several implementation methods.

[0441] In a first possible implementation, a high bit MSB of the identifier of the first resource is related to a starting symbol position of the SL-PRS, and a low bit LSB of the identifier of the first resource is related to the number of symbols of the SL-PRS.

[0442] As an example, the high bit MSB of the identifier of the first resource is set to the starting symbol of the SL-PRS, and the low bit LSB of the identifier of the first resource is set to the number of symbols of the SL-PRS. For example, the identifier of the first resource is [start, duration]. Among them, "start" represents the starting symbol occupied by the first resource, and "duration" represents the number of symbols occupied by the first resource.

[0443] by Figure 5 For example, there are 9 cases of the starting symbol of SL-PRS (i.e., the starting symbol of SL-PRS is a symbol from 4 to 12), which is indicated by 4 bits. There are 3 types of SL-PRS symbol lengths (such as 1, 2, and 4), which occupy 2 bits. Based on the above method, 5 bits can be used to indicate the identifier of the SLPRS resource.

[0444] In a second possible implementation, a high bit MSB of the identifier of the first resource is related to the number of symbols of the SL-PRS, and a low bit LSB of the identifier of the first resource is related to the starting symbol of the SL-PRS.

[0445] As an example, the high bit MSB of the identifier of the first resource is set to the number of SL-PRS symbols, and the low bit LSB of the identifier of the first resource is set to the start symbol of the SL-PRS. For example, the identifier of the first resource is [duration, start].

[0446] The second possible implementation is similar to the first possible implementation, and will not be described in detail here.

[0447] A third possible implementation is to jointly encode the start symbol of the SL-PRS and the number of SL-PRS symbols. For example, the total number of encoded IDs is the product of the number of SLPRS symbol positions and the number of all SLPRS lengths.

[0448] by Figure 5 Taking (1) in the example, there are 9 cases of the starting symbol of SL-PRS (that is, the starting symbol of SL-PRS is a symbol from 4 to 12), and there are 3 symbol lengths of SL-PRS (such as 1, 2, 4). Based on the above method, when jointly coded, the identifier of the first resource has a total of 3*9=27 values, and 5 bits can be used to indicate the identifier of the SLPRS resource.

[0449] It can be understood that the above describes respectively the scheme of determining the identifier of the first resource according to the length of the time domain resource that can be used to transmit the SL-PRS (i.e., Ma), and the scheme of determining the identifier of the first resource according to the starting position and length of the time domain resource used to transmit the SL-PRS, and the embodiments of the present application are not limited to this. In one example, the identifier of the first resource can also be determined according to Ma and the starting position of the time domain resource used to transmit the SL-PRS, such as replacing the length of the time domain resource used to transmit the SL-PRS in the above scheme B with Ma. In another example, the identifier of the first resource can also be determined according to Ma, the starting position and length of the time domain resource used to transmit the SL-PRS, such as the starting position and length of the time domain resource used to transmit the SL-PRS in the above scheme B can be determined according to Ma. For example, the first communication device determines Ma, and then determines the starting position and length of the time domain resource used to transmit the SL-PRS in the Ma, and then the above scheme B can be used to determine the identifier of the first resource.

[0450] It can also be understood that the above mainly uses the example of the first communication device determining the identifier of the first resource as an example, and this is not limited to this. For example, the network device can also determine the identifier of the first resource based on the above scheme A or scheme B, and then indicate the identifier of the first resource to the first communication device. For another example, the network device can also determine the identifiers of multiple resources based on the above scheme A or scheme B, and then indicate the identifiers of the multiple resources to the first communication device, and the first communication device determines the identifier of the first resource from the identifiers of the multiple resources.

[0451] The above describes the relevant schemes for identifying the first resource. It can be understood that the above is an example, and any variation of the above scheme is applicable to the embodiments of the present application. For example, in the above scheme A, Ma can also be replaced by the length of the time domain resource used to transmit the SL-PRS.

[0452] Optionally, method 700 further includes: the second communication device obtains an identifier of the first resource or the first resource. Based on this, the second communication device can know the location of the first resource, and then receive a reference signal on the first resource. Further optionally, the second communication device can perform related operations based on the received reference signal. For example, if the reference signal is a SL-PRS, the second communication device can perform positioning according to the SL-PRS and obtain positioning related information.

[0453] In a possible implementation, the second communication device receives indication information #3, where the indication information #3 indicates the first resource or the identifier of the first resource. For example, the second communication device receives indication information #3 from the first communication device. For another example, the second communication device receives indication information #3 from a network device.

[0454] The indication information #3 may be carried in the SCI, for example. Specifically, the first communication device sends the SCI to the second communication device, and the SCI includes the indication information #3.

[0455] In one example, indication information #3 indicates the first resource.

[0456] For example, indication information #3 includes at least one of the following: the starting position of the first resource in the time domain, the length of the first resource in the time domain, the ending position of the first resource in the time domain, the offset of the first resource in the frequency domain, and the comb tooth size of the first resource in the frequency domain.

[0457] In another example, indication information #3 indicates an identifier of the first resource.

[0458] The identifier of the first resource indicates the first resource. Therefore, the second communication device can obtain the location of the first resource based on the identifier of the first resource, and then receive the SL-PRS at the location.

[0459] For example, if the identifier of the first resource is associated with the starting position and length of the first resource, such as the identifier of the first resource is generated based on the above-mentioned scheme B, then the second communication device can obtain the starting position of the first resource based on the identifier of the first resource, the length of the first resource determined in the current time slot, and the associated relationship.

[0460] Among them, the positioning related information may include, for example, but is not limited to: measurement results of positioning measurement quantities obtained according to SL-PRS, and location information of communication devices (such as the second communication device and / or the first communication device) obtained according to SL-PRS.

[0461] As an example, the positioning measurement quantity may include one or more of the following: angle, time, power, etc.

[0462] The angle may be, for example, an angle of arrival (AOA).

[0463] The time may include, for example, one or more of the following: a timing difference between sending and receiving, a reference signal sending time, a reference signal arrival time, an arrival time difference, and the like.

[0464] The power may include, for example, one or more of the following: reference signal receiving power (reference signal receiving power, RSRP), reference signal per path power (reference signal receiving power per path, RSRPP).

[0465] Further optionally, the second communication device determines the SL-PRS resource based on the identifier of the first resource and at least one of the following: the length of the time domain resources of the PSCCH, the pattern of the DMRS, and the length of the time domain resources of the PSFCH.

[0466] For example, the length of the time domain resources of the PSCCH, such as the number of symbols occupied by the PSCCH, may be indicated by the configuration information.

[0467] For example, the pattern of the DMRS may be indicated by the first communication device.

[0468] For example, the length of the PSFCH time domain resource may be the number of symbols occupied by the PSFCH in the current time domain unit (eg, current time slot). For example, the second communication device may determine the first resource based on the identifier of the first resource and whether there is a PSFCH resource in the current time domain unit.

[0469] In this way, after the second communication device receives the identifier of the first resource, it also determines the physical resources actually occupied by the SL-PRS corresponding to the identifier of the first resource based on at least one of the following information: the number of symbols occupied by PSCCH, the pattern of DMRS, and whether there are PSFCH resources in the receiving time slot at that time. After the second communication device obtains the above information, the second communication device's understanding of the number and position of symbols that can be used to transmit SL-PRS in the current time slot is the same as that of the first communication device. Then the second communication device can uniquely determine the position corresponding to this SL-PRS resource in the time slot (such as the position of the start and end symbols) based on the indication information of the received SL-PRS resource identifier. Thereby, under the condition of saving the indication signaling of SCI, the SL-PRS resources are accurately indicated in the second communication device and the first communication device, avoiding errors in resource indication.

[0470] Optionally, method 700 also includes: the first communication device sends reservation information in the first time slot where the first resource is located, the reservation information indicates at least one second time slot, the second time slot is the time slot where the data packet is retransmitted, and the first time slot and / or the second time slot also includes a second resource for transmitting SL-PRS.

[0471] The reservation information may represent resource reservation information between retransmissions. As an example, the reservation information may be carried in the SCI.

[0472] The first time slot is located before the second time slot. The first time slot may be a time slot where the data packet is initially transmitted, or the first time slot may be a time slot where the data packet is retransmitted.

[0473] Among them, the method for determining the identifier of the second resource can refer to the method for determining the identifier of the first resource, which will not be repeated here.

[0474] Fig. 9 Schematic diagram of PSSCH and SL-PRS transmission applicable to the embodiment of the present application. Fig. 9As shown, it is assumed that the number of transmissions (or the maximum number of reservations) of PSSCH and SL-PRS is three, that is, one initial transmission plus two retransmissions. Assuming that the time slots in which the three transmissions are located are time slot #1, time slot #2, and time slot #3, respectively, in time slot #1, the first communication device can indicate the resources used to transmit SL-PRS in time slot #1, such as SL-PRS resource #1; in time slot #2, the first communication device can indicate the resources used to transmit SL-PRS in time slot #2, such as SL-PRS resource #2; in time slot #3, the first communication device can indicate the resources used to transmit SL-PRS in time slot #3, such as SL-PRS resource #3. Optionally, the relationship between these three SL-PRS transmissions can be associated as multiple retransmissions of the same SL-PRS (or reservations between initial transmission and retransmission) based on the indication information indicating the reservation for retransmission of PSSCH. Optionally, the relationship between the three SL-PRS transmissions can also be based on the fact that the values ​​of the source identifier and the destination identifier indicating the SL-PRS are the same, and the receiving device clearly identifies them as three transmissions of the same SL-PRS. Based on this, it can be seen that the scheduling signaling of the SL-PRS can indicate the resources of this time slot without indicating retransmission reservation, which can reduce the overhead of the SL-PRS indication signaling.

[0475] In some cases, the time domain resource length of the configured first resource may be greater than the time domain resource length actually supported or allowed by the first communication device. For example, the network device configures the time domain resource length of the first resource to be 4 symbols, and the time domain resource length actually supported or allowed by the UE is 1 or 2. In this regard, the present application proposes some solutions to solve the above problems. It can be understood that the embodiments described below can be used separately or in combination with the previous embodiments, and this is not limited.

[0476] Optionally, the first communication device receives indication information #4, and indication information #4 indicates the second resource; in step 701, the first communication device obtains the identifier of the first resource, including: the first communication device determines the first resource based on the second resource and the resources that the first communication device can use, and the length of the first resource in the time domain resource is less than the length of the second resource in the time domain resource. Among them, the first communication device can receive indication information #4 from the network device. Based on this scheme, it can be known that if the time domain resource length of the configured first resource is greater than the time domain resource length actually supported or allowed by the first communication device, then the first communication device can use a time domain resource with a smaller length to transmit the SL-PRS.

[0477] Furthermore, regarding the first communication device adopting the first resource to send the SL-PRS, the following methods may be included.

[0478] In method A, the first communication device transmits the SL-PRS in a full staggered manner based on the length of the first resource in the time domain.

[0479] Taking a time slot as an example, based on method A, if the time domain resource length (number of symbols) of the configured first resource is greater than the time domain resource length (number of symbols) actually supported or allowed by the first communication device, then the first communication device can use the nearest allowed number of symbols and generate SL-PRS in a fully interleaved manner according to the smaller number of symbols.

[0480] For example, assuming that the second resource indicated by indication information #4 is 4 symbols in a time slot. If the number of symbols that the first communication device can use to send SL-PRS in a time slot is greater than or equal to 4, then the first communication device can use 4 symbols to send SL-PRS, such as according to Figure 3 If the number of symbols that the first communication device can use to send SL-PRS in a time slot is less than 4, such as at most 2 symbols can be used to send SL-PRS, then the first communication device can use 2 symbols and use a fully interleaved manner to send SL-PRS, such as according to Figure 3 Send in Comb-2 format.

[0481] In mode B, the first communication device transmits the SL-PRS on the first resource by using a partial stagger method based on the length of the second resource on the time domain resource.

[0482] Taking a time slot as an example, based on method B, if the time domain resource length (number of symbols) of the configured first resource is greater than the time domain resource length (number of symbols) actually supported or allowed by the first communication device, then the first communication device can generate SL-PRS in a partially staggered manner according to the configured number of symbols and the corresponding Comb size value.

[0483] For example, assuming that the second resource indicated by indication information #4 is 4 symbols in a time slot. If the number of symbols that the first communication device can use to send SL-PRS in a time slot is greater than or equal to 4, then the first communication device can use 4 symbols to send SL-PRS, such as according to Figure 3 If the number of symbols that the first communication device can use to send SL-PRS in a time slot is less than 4, such as at most 2 symbols can be used to send SL-PRS, then the first communication device can send SL-PRS in a partially staggered manner in the form of Comb-4, such as according to Fig.10 The data is sent in the form shown in (1) or (2).

[0484] Fig.10 Schematic diagram of sending SL-PRS in a partially staggered manner applicable to an embodiment of the present application. For understanding, Fig.10 (1) and (2) in can be considered as part of SL-PRS with a comb size of 4 (i.e., Comb-4).

[0485] Two methods are introduced above, but they are not limited to this.

[0486] Further optionally, the first communication device may determine whether to adopt the above-mentioned method A or method B in the following manner.

[0487] In a first possible implementation manner, the first communication device itself determines whether to adopt manner A or manner B.

[0488] Based on this method, when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS, the first communication device can determine by itself whether to adopt the above-mentioned method A or method B.

[0489] For example, when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS, the first communication device may select any one of the methods.

[0490] For another example, when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS, if the number of symbols that can actually be used to transmit the SL-PRS satisfies the first preset range, the first communication device adopts the above-mentioned method A; if the number of symbols that can actually be used to transmit the SL-PRS satisfies the second preset range, the first communication device adopts the above-mentioned method B. The first preset range and the second preset range may be predefined.

[0491] In a second possible implementation manner, other devices (such as network equipment) may indicate to the first communication device whether to adopt method A or method B.

[0492] For example, other devices (such as network devices) may send indication information #5 to the first communication device, and indication information #5 indicates that the first communication device transmits SL-PRS in a fully interleaved manner or in a partially interleaved manner. If indication information #5 indicates that the first communication device transmits SL-PRS in a fully interleaved manner, then when the number of symbols that can actually be used to transmit SL-PRS is less than the number of symbols configured for SL-PRS, the first communication device adopts the above-mentioned method A; if indication information #5 indicates that the first communication device transmits SL-PRS in a partially interleaved manner, then when the number of symbols that can actually be used to transmit SL-PRS is less than the number of symbols configured for SL-PRS, the first communication device adopts the above-mentioned method B.

[0493] The embodiment of the present application does not limit the triggering conditions for other devices (such as network equipment) to send indication information #5 to the first communication device.

[0494] For example, other devices (such as network devices) can actively send indication information #5 to the first communication device. As an example, the indication information #5 can be carried in the same signaling as the number of symbols of the configured SL-PRS, or can also be carried in different signaling, without limitation.

[0495] For another example, other devices (such as network devices) may send indication information #5 to the first communication device when determining that the number of symbols that the first communication device can actually use to transmit SL-PRS is less than the number of symbols configured for SL-PRS. The other devices (such as network devices) may determine that the number of symbols that the first communication device can actually use to transmit SL-PRS is less than the number of symbols configured for SL-PRS by: the first communication device sends notification information to other devices, notifying the first communication device that the number of symbols that the first communication device can actually use to transmit SL-PRS is less than the number of symbols configured for SL-PRS.

[0496] The third possible implementation method is pre-definition, such as protocol pre-definition, to adopt method A or method B.

[0497] Based on this method, it can be predefined whether to use the above-mentioned method A or method B when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS.

[0498] For example, it is predefined that when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS, the above-mentioned method A or method B is adopted.

[0499] For another example, it is predefined that when the number of symbols that can actually be used to transmit the SL-PRS is less than the number of symbols configured for the SL-PRS, if the number of symbols that can actually be used to transmit the SL-PRS meets the first preset range, the above-mentioned method A is adopted; if the number of symbols that can actually be used to transmit the SL-PRS meets the second preset range, the above-mentioned method B is adopted.

[0500] The above three implementation methods are for illustration only, and variations of the above three methods are also applicable to the embodiments of the present application.

[0501] Further optionally, the first communication device receives indication information #6, where indication information #6 indicates the minimum length of the time domain resources used to transmit the SL-PRS. For example, indication information #6 indicates the minimum number of symbols (denoted as G for simplicity) used to transmit the SL-PRS in a time slot.

[0502] In one possible case, in a time slot, the number of symbols actually used by the first communication device to transmit the SL-PRS is less than G. In this case, the first communication device does not send the SL-PRS in the time slot.

[0503] In another possible case, in a time slot, the number of symbols actually used by the first communication device to transmit the SL-PRS is greater than or equal to G. In this case, the first communication device sends the SL-PRS in the time slot.

[0504] Based on this method, the minimum number of symbols for transmitting SL-PRS can be limited. In this way, when the number of symbols actually used by the first communication device to transmit SL-PRS is less than the minimum number of symbols, the first communication device does not send SL-PRS in the current time slot. In this way, the transmission performance of SL-PRS can be guaranteed.

[0505] In some cases, there may be multiple transmission opportunities for reference signals (such as SL-PRS) in a time slot. For this situation, the present application proposes some solutions to implement resource indication of SL-PRS. It can be understood that the embodiments described below can be used separately or in combination with the previous embodiments, and there is no limitation on this.

[0506] Optionally, the first resource includes T transmission resources, at least two of the T transmission resources are discontinuous in the time domain, and T is an integer greater than 1; the first communication device sends indication information #7, and the indication information #7 indicates at least one transmission resource in the first resource, and at least one transmission resource in the first resource is used to transmit a reference signal (such as SL-PRS). Based on this method, the transmission resources of the SL-PRS can be flexibly indicated, such as indicating relevant information of the transmission resources of multiple SL-PRS in a time slot, thereby improving the flexibility of the indication. Optionally, this scheme can be used for a dedicated resource pool. Optionally, the value of T is the maximum number of reservations or retransmissions.

[0507] As an example, indication information #7 may be carried in the SCI.

[0508] It can be understood that the first communication device can use T transmission resources to send SL-PRS, or can use part of the T transmission resources to send SL-PRS, and this is not limited.

[0509] Fig.11 FIG. 1 is a schematic diagram of SL-PRS transmission applicable to an embodiment of the present application. Fig.11 As shown in (1), the first resource includes two transmission resources in one time slot, one of which includes: symbol 4, symbol 5, symbol 6, symbol 7, and the other includes: symbol 10, symbol 11, symbol 12. Fig.11As shown in (3), the first resource includes three transmission resources in one time slot, one of which includes: symbol 4, symbol 5, symbol 6, symbol 7, another transmission resource includes: symbol 9, symbol 10, symbol 11, symbol 12, and another transmission resource includes: symbol 12. Fig.11 As shown in (3), the first resource includes three transmission resources in one time slot, one of which includes symbol 4 and symbol 5, another includes symbol 8 and symbol 9, and another includes symbol 12. Fig.11 As shown in (4), the first resource includes three transmission resources in a time slot, one of which includes: symbol 4, symbol 5, symbol 6, another transmission resource includes: symbol 8, symbol 9, and another transmission resource includes: symbol 11, symbol 12.

[0510] The indication information #7 may indicate the relevant information of the transmission resource. As an example, the relevant information of the transmission resource includes but is not limited to at least one of the following: the position of the transmission resource in the time domain, the offset (REoffset) of the transmission resource in the frequency domain, or the comb tooth size.

[0511] Assuming that the T transmission resources include a first transmission resource and a second transmission resource, as an example, the indication information #7 indicates at least one of the following: relevant information of the first transmission resource and / or relevant information of the second transmission resource. Several examples are introduced below.

[0512] Example 1: indication information #7 indicates relevant information of the first transmission resource and relevant information of the second transmission resource.

[0513] Based on this example, the first communication device may indicate relevant information of each transmission resource.

[0514] Example 2: indication information #7 indicates relevant information of the first transmission resource.

[0515] Based on this example, the first communication device can indicate relevant information of one or more transmission resources, and the receiving end (i.e., the second communication device) can obtain relevant information of the one or more transmission resources and relevant information of other transmission resources based on the relevant information of the one or more transmission resources. In this way, the signaling overhead caused by indicating the transmission resources can be saved.

[0516] Taking the first transmission resource and the second transmission resource as an example, the relevant information of the first transmission resource is associated with the relevant information of the second transmission resource. In this way, the receiving end can obtain the relevant information of the first transmission resource based on the indication information #7, and determine the relevant information of the second transmission resource based on the relevant information of the first transmission resource and the association between the relevant information of the first transmission resource and the relevant information of the second transmission resource.

[0517] It is understood that the above is an example description and is not limited to this. Any variation of the above scheme is applicable to the embodiments of the present application. For example, the first communication device can indicate partial information of the first transmission resource and partial information of the second transmission resource, and the receiving end can determine other information of the first transmission resource and the second transmission resource based on the partial information of the first transmission resource and the partial information of the second transmission resource.

[0518] Optionally, when the first resource includes T transmission resources, the identifier of the first resource satisfies any of the following:

[0519] n ID =n RE +m s *N 1,comb

[0520] n ID =n RE +N 1,comb +(m s -1)*N 2,comb

[0521] n ID =n RE +N 1,comb +N 2,comb +(m s -2)*N 3,comb

[0522] Among them, n ID Indicates the identifier of the first resource; N i,comb Indicates the comb tooth size of the i-th transmission reference signal; n RE Represents the offset of the reference signal in the frequency domain; m s =i-1, indicating the indication information that the reference signal is transmitted on the i-th transmission resource; i=1,2,3.

[0523] As an example, m s = 0, n RE The value ranges from 0 to N. 1,comb ; When m s =1, n RE The value ranges from 0 to N. 2,comb ; When m s =2, n RE The value ranges from 0 to N. 3,comb .

[0524] The following three scenarios are explained.

[0525] Scenario 1, T=2.

[0526] In this case, there are two SL-PRS transmission resources in one time slot, such as Fig.11 Assume that the number of SL-PRS symbols and comb tooth size on these two SL-PRS transmission resources are {M1, N 1,comb}, {M2, N 2,comb}.

[0527] The resource identifier of SL-PRS is determined as follows:

[0528] n ID =n RE +m s *N 1,comb

[0529] Among them, m s =0 or 1. m s = 0 means that SL-PRS is sent on the first transmission resource, m s =1 indicates that SL-PRS is sent on the second transmission resource.

[0530] Scenario 2, T=3.

[0531] In this case, there are three SL-PRS transmission resources in one time slot, such as Fig.11 Assume that the number of SL-PRS symbols and comb tooth size on these three SL-PRS transmission resources are {M1, N 1,comb}, {M2, N 2,comb}, {M3, N 3,comb}.

[0532] If m s ≤1, then the resource identifier of SL-PRS is determined as follows:

[0533] n ID =n RE +m s *N 1,comb

[0534] If m s =2, then the resource identifier of SL-PRS is determined as follows:

[0535] n ID =n RE +N 1,comb +(m s -1)*N 2,comb

[0536] Scenario 3, T=4.

[0537] In this case, there are four SL-PRS transmission resources in one time slot. Assume that the number of SL-PRS symbols and comb tooth size on these four SL-PRS transmission resources are {M1, N1,comb}, {M2, N 2,comb}, {M3, N 3,comb}, {M4, N 4,comb}.

[0538] If m s ≤1, then the resource identifier of SL-PRS is determined as follows:

[0539] n ID =n RE +m s *N 1,comb

[0540] If m s =2, then the resource identifier of SL-PRS is determined as follows:

[0541] n ID =n RE +N 1,comb +(m s -1)*N 2,comb

[0542] If m s =3, then the resource identifier of SL-PRS is determined as follows:

[0543] n ID =n RE +N 1,comb +N 2,comb +(m s -2)*N 3,comb

[0544] It can be understood that the above three scenarios are for illustration only and the embodiments of the present application are not limited thereto.

[0545] As mentioned above, the first resource (i.e., SL-PRS resource) can be determined according to the time domain resource used to transmit the sidelink reference signal. The following takes the sidelink reference signal as PT-RS and the sidelink positioning reference signal as SL-PRS as an example. Fig.12 The following embodiments can be used in combination with the previous embodiments or can be used alone, which is not limited.

[0546] Fig.12 Yes d =13 Schematic diagram of the time slot structure of DMRS, PSCCH and PT-RS. PT-RS represents the density (or resource density, or period) of PT-RS. As an example, l PT-RSThe number of resources (such as the number of symbols) between two adjacent PT-RS resources + 1, and for resources of other signals (such as PSCCH and DMRS), the count is restarted. Fig.12 (a) and (b), l PT-RS =2. For another example, Fig.12 (c) and (d) in the above table, PT-RS =4. Fig.12 As can be seen in FIG. 1 , PT-RS may occupy multiple symbols in a time slot, so PT-RS resources and SL-PRS resources may overlap (or PT-RS and SL-PRS conflict). Therefore, the present application embodiment proposes four methods to solve this problem.

[0547] In a first possible implementation manner, when the PT-RS resources and the SL-PRS resources overlap at a certain resource position, the first communication device sends the SL-PRS at that position.

[0548] For example, assuming that the SL-PRS resource is a continuous resource, taking a time slot as an example, the time domain resource of the SL-PRS is M continuous symbols on the time slot, if the PT-RS and the SL-PRS collide on m symbols of the M continuous symbols, that is, the time domain resource of the PT-RS includes the m symbols, then the PT-RS is not sent on the m symbols, and the SL-PRS is sent. Wherein, m is an integer greater than 1 or equal to 1, and less than M or equal to M.

[0549] As an example, the M consecutive symbols may be the last M consecutive symbols in the time slot that can satisfy M. Fig.12 Taking (a) as an example, for example, if M=1, the M consecutive symbols are: symbol 12; for another example, if M=2, the M consecutive symbols are: symbol 12 and symbol 11; for another example, if M=4, the M consecutive symbols are symbol 9, symbol 8, symbol 7, and symbol 6.

[0550] by Fig.12 Taking (a) in FIG. 1 as an example, assuming that the time domain resource of SL-PRS is symbol 12, Fig.12 From (a) in FIG. 1 , it can be seen that the PT-RS and SL-PRS collide at symbol 12, that is, the time domain resource of the PT-RS includes symbol 12. Based on this implementation, the PT-RS is not sent at the position of symbol 12, but the SL-PRS is sent. Assuming that the time domain resource of the SL-PRS is symbol 6 to symbol 9, Fig.12 From (a), it can be seen that PT-RS and SL-PRS conflict at symbols 7 and 9, that is, the time domain resources of PT-RS include symbols 7 and 9. Based on this implementation method, PT-RS is not sent at the positions of symbols 7 and 9, but SL-PRS is sent.

[0551] A second possible implementation manner is to configure k candidate resources for the SL-PRS, and select a candidate resource that does not overlap with a PT-RS resource among the k candidate resources to send the SL-PRS, where k is an integer greater than 1.

[0552] As an example, when one of the candidate resources overlaps with the PT-RS resource, a candidate resource adjacent to the candidate resource (ie, the next candidate resource of the candidate resource) is selected to send the SL-PRS.

[0553] For example, the time domain resources of SL-PRS are M consecutive symbols, and the network device can configure k candidate resources (or k groups of candidate resources), and the length of each group of candidate resources is M.

[0554] For example, Fig.12 Take (e) in FIG. 1 as an example, assuming that M=1, the time domain resources of SL-PRS include two groups of candidate resources, namely symbol 12 and symbol 10. Fig.12 It can be seen from (e) that the time domain resources of PT-RS include a group of candidate resources for SL-PRS (i.e., symbol 10). Therefore, the first communication device does not use this group of candidate resources (i.e., symbol 10) to send SL-PRS, but uses another group of candidate resources (i.e., symbol 12) to send SL-PRS.

[0555] For example, Fig.12 As an example, assuming that M=2, the time domain resources of SL-PRS include two groups of candidate resources, one group of candidate resources includes symbol 10 and symbol 9, and the other group of candidate resources includes symbol 8 and symbol 7. Fig.12 It can be seen from (f) that the time domain resources of PT-RS include resources in a group of candidate resources of SL-PRS (i.e., symbol 10). Therefore, the first communication device does not use this group of candidate resources (i.e., symbol 10 and symbol 9) to send SL-PRS, but uses another group of candidate resources (i.e., symbol 8 and symbol 7) to send SL-PRS.

[0556] As mentioned above, the identifier of the SL-PRS resource may be determined by the first communication device, or may be determined by the network device and indicated to the first communication device (eg, indicated by indication information #1). The following briefly describes these two methods.

[0557] In one example, the network device configures k groups of candidate resources for SL-PRS and configures PT-RS resources for PT-RS, and then the network device selects candidate resources that do not overlap with the PT-RS resources (such as partial overlap or full overlap), and sends indication information #1 to the first communication device, where the indication information #1 indicates the candidate resource (such as the indication information #1 indicates the identifier of the candidate resource).

[0558] by Fig.12 Take (a) in the figure as an example, assuming that l d =13, the time domain resources of DMRS are 2 symbols, the time domain resources of PSCCH are 2 symbols, k=2, then: if M is 1, the two groups of candidate resources of SL-PRS are: {symbol 12} and {symbol 11}; if M is 2, the two groups of candidate resources of SL-PRS are: {symbol 12, symbol 11} and {symbol 9, symbol 8}; if M is 4, the two groups of candidate resources of SL-PRS are: {symbol 6 to symbol 9} and {symbol 5 to symbol 8}. Assuming that the identifier value of SL-PRS resource starts from 0, the identifier value of SL-PRS resource may be: {0,1,2,3,4,5}. Among them, the identifier "0" corresponds to symbol 12, the identifier "1" corresponds to symbol 11, the identifier "2" corresponds to symbol 12 and symbol 11, the identifier "3" corresponds to symbol 9 and symbol 8, the identifier "4" corresponds to symbol 6 to symbol 9, and the identifier "5" corresponds to symbol 5 to symbol 8. The correspondence between the identifier and the symbol may be predefined, preconfigured, or pre-agreed upon, and is not limited.

[0559] For example, assuming that the length of the SL-PRS time domain resource is M=1, it can be seen from the above that the two groups of candidate resources for the SL-PRS are: {symbol 12} and {symbol 11}. Fig.12 As shown in (a), PT-RS and SL-PRS conflict on symbol 12, that is, the time domain resource of PT-RS includes symbol 12, so the network device selects symbol 11 as the time domain resource of SL-PRS. Specifically, the network device sends indication information #1 to the first communication device, and indication information #1 indicates that the identifier of the time domain resource of SL-PRS is identifier "0" corresponding to symbol 11; after the first communication device receives indication information #1, it learns that the identifier of the time domain resource of SL-PRS is identifier "0", and the first communication device determines that the time domain resource of SL-PRS is symbol 11 based on the correspondence between the above identifier and the symbol. Further, the first communication device can indicate the identifier "0" corresponding to symbol 11 to the second communication device (such as indicating symbol 11 through SCI), and the second communication device can know that the time domain resource of SL-PRS is symbol 11 based on the identifier "0" corresponding to symbol 11.

[0560] In another example, the network device configures k groups of candidate resources for SL-PRS and configures PT-RS resources for PT-RS, and then the network device sends indication information #1 to the first communication device, where indication information #1 indicates the identifiers of multiple resources (such as the identifiers of k groups of candidate resources), and the first communication device selects candidate resources that do not overlap with PT-RS resources (such as partial overlap or full overlap) to transmit SL-PRS. Further optionally, the network device also sends information about PT-RS resources to the first communication device. Further optionally, the network device can indicate k to the first communication device, such as through indication information #1, or through other indication information, without limitation.

[0561] Still taking the above example, for example, assuming that the length of the time domain resource of SL-PRS is M=1, it can be seen from the above that the two groups of candidate resources of SL-PRS are: {symbol 12} and {symbol 11}, so the network device sends indication information #1 to the first communication device, and indication information #1 indicates the identifier "0" corresponding to symbol 12, and the identifier "1" corresponding to symbol 11; the first communication device knows based on indication information #1 that the candidate resources of SL-PRS configured by the network device include symbols 12 and 11; the first communication device knows based on the information of PT-RS resources that PT-RS and SL-PRS conflict on symbol 12, that is, the time domain resource of PT-RS includes symbol 12, so the first communication device selects symbol 11 to send SL-PRS. Further, the first communication device can indicate the identifier "0" corresponding to symbol 11 to the second communication device (such as indicating symbol 11 through SCI), and the second communication device knows that the time domain resource of SL-PRS is symbol 11 based on the identifier "0" corresponding to symbol 11.

[0562] A third possible implementation manner is that when the PT-RS resource and the SL-PRS resource overlap at a certain resource position, the first communication device selects a resource position associated with the SL-PRS resource to send the SL-PRS.

[0563] The resource location associated with the SL-PRS resource may be an available resource location adjacent to the SL-PRS resource, or may be an available resource location spaced w resources apart from the SL-PRS resource.

[0564] Wherein, w is an integer greater than 1 or equal to 1, and w may be predefined, preconfigured, or indicated by the network side, and is not limited thereto. Wherein, the available resource position indicates the position that can satisfy the SL-PRS resource length of M, such as M consecutive symbols.

[0565] For example, the time domain resource of SL-PRS is M consecutive symbols, and the network device can configure 1 SL-PRS resource. The length of the SL-PRS resource is M, that is, the SL-PRS resource is M consecutive symbols.

[0566] For example, Fig.12 As an example, assume that M = 2, and the time domain resources of SL-PRS configured by the network device are symbol 10 and symbol 9. Fig.12 It can be seen from (f) that the time domain resources of PT-RS include symbol 10, so the first communication device does not use this group of resources (i.e., symbol 10 and symbol 9) to send SL-PRS. In one example, the first communication device uses a group of resources adjacent to the group of resources, i.e., symbol 8 and symbol 7, to send SL-PRS by default (such as protocol agreement, pre-agreement, pre-configuration, etc.); in another example, the first communication device uses a group of resources adjacent to the group of resources, i.e., symbol 8 and symbol 7, to send SL-PRS based on instructions from the network side. Correspondingly, the second communication device uses symbol 8 and symbol 7 to receive SL-PRS. Among them, the second communication device uses symbol 8 and symbol 7 to receive SL-PRR resources, including the following methods.

[0567] In one embodiment, the first communication device indicates the positions of the symbol 8 and the symbol 7 to the second communication device.

[0568] In another way, the network device or the first communication device indicates the configured SL-PRS resources (i.e., symbol 10 and symbol 9) to the second communication device, and indicates to the second communication device whether to use the configured SL-PRS resources to receive the SL-PRS, or to use a group of resources adjacent to the resource (i.e., symbol 8 and symbol 7) to receive the SL-PRS. For example, the first communication device sends indication information #9 to the second communication device, and indication information #9 indicates whether to use the configured SL-PRS resources to receive the SL-PRS, or to use a group of resources adjacent to the resource (i.e., symbol 8 and symbol 7) to receive the SL-PRS. Indication information #9 can be implemented by at least one bit. Assuming that indication information #1 is implemented by 1 bit, if the value of this bit is "0", it means that indication information #9 indicates the use of the configured SL-PRS resources to receive SL-PRS, that is, the SL-PRS resources are the configured SL-PRS resources (that is, symbol 10 and symbol 9); if the value of this bit is "1", it means that indication information #9 indicates the use of a group of resources adjacent to the resource (that is, symbol 8 and symbol 7) to receive SL-PRS, that is, the SL-PRS resources are a group of resources adjacent to the resource (that is, symbol 8 and symbol 7).

[0569] It can be understood that the above mainly uses adjacent as an example for exemplary description, and this is not limited. For example, if the configured SL-PRS resources (i.e., the configured M symbols) are not available (such as overlapping with PT-RS resources), the available M consecutive symbols moved forward by w resource units (such as w symbols) can also be used, or the available M consecutive symbols moved backward by w resource units (such as w symbols) can also be used, or the available M symbols located before the configured M symbols on the time slot can also be used, or the available M symbols located after the configured M symbols on the time slot can also be used.

[0570] It can also be understood that the above-mentioned configured M symbols and available M symbols are symbols in one time slot. This is not limited. For example, the configured M symbols and available M symbols may also be symbols on adjacent time slots.

[0571] A fourth possible implementation method is to refer to PT-RS resources when configuring SL-PRS resources to avoid conflicts between SL-PRS resources and PT-RS resources.

[0572] As mentioned above, the SL-PRS resource may be determined by the first communication device, or by the network device, or by other devices, without limitation. The following is an exemplary description using the example of the first communication device determining the SL-PRS resource and the network device determining the SL-PRS resource.

[0573] In one example, the network device determines the SL-PRS resource and indicates the SL-PRS resource to the first communication device, such as indicating the identifier of the SL-PRS resource through indication information #1. As mentioned above, the network device can also indicate the SL-PRS resource to the second communication device, or the first communication device can also indicate the SL-PRS resource to the second communication device, without limitation.

[0574] Optionally, the network device determines the time domain resources of SL-PRS based on the length of the time domain resources of SL-PRS being M, the information of PT-RS resources and the following conditions: the time domain resources of SL-PRS are the last few consecutive symbols in a time slot that satisfy the length of M, and the SL-PRS resources do not conflict with the PT-RS resources.

[0575] by Fig.12 For example, in (g), the density of PTRS is 4, then the number of symbols in PSCCH is 2, l d =13, the network device can determine the positions of PT-RS, DMRS and PSCCH symbols.

[0576] For example, if M=1, based on the above conditions, the network device can determine that the time domain resource of SL-PRS is symbol 12. Further, the network device can send an identifier of symbol 12 to the first communication device, and the first communication device can know that the time domain resource of SL-PRS is symbol 12 based on the identifier.

[0577] For another example, if M=2, the time domain resources based on SL-PRS are the last several consecutive symbols in a time slot that meet the length of M, and the network device can determine that the time domain resources of SL-PRS are symbols 10 and 9. Fig.12 It can be seen from (g) that the PT-RS and SL-PRS collide on symbol 10, that is, the time domain resources of the PT-RS include symbol 10. Therefore, in one possible way, the network device determines to send the SL-PRS on symbol 10 and not to send the PT-RS, that is, the time domain resources of the SL-PRS include symbols 10 and 9. Further, the network device can send identifiers of symbol 10 and symbol 9 to the first communication device, and the first communication device can know that the time domain resources of the SL-PRS are symbols 10 and symbol 9 based on the identifier. In another possible way, the network device re-determines the time domain resources of the SL-PRS that meet the above conditions, such as symbol 9 and symbol 8. Further, the network device can send identifiers of symbol 9 and symbol 8 to the first communication device, and the first communication device can know that the time domain resources of the SL-PRS are symbols 9 and symbol 8 based on the identifier.

[0578] For another example, if M=4, based on the fact that the time domain resources of SL-PRS are the last several consecutive symbols in a time slot that satisfy the length of M, the network device can determine that the time domain resources of SL-PRS can be symbols 7 to 10. Fig.12 It can be seen from (g) that the PT-RS and SL-PRS collide on symbol 10, that is, the time domain resources of the PT-RS include symbol 10. Therefore, one possible way is to send the SL-PRS on symbol 10 and not send the PT-RS, that is, the time domain resources of the SL-PRS include symbols 7 to 10. Further, the network device can send an identifier of symbols 7 to 10 to the first communication device, and the first communication device can know that the time domain resources of the SL-PRS are symbols 7 to 10 based on the identifier. Another possible way is that the network device re-determines the time domain resources of the SL-PRS that meet the above conditions, by Fig.12 From (g), it can be seen that the length of the time domain resources of symbol 2 to symbol 5 that satisfies SL-PRS is M, but PT-RS and SL-PRS also conflict on symbol 2. Therefore, in this case, the former possible method can be adopted.

[0579] In another example, the first communication device determines the SL-PRS resource.

[0580] Optionally, the first communication device determines the time domain resources of the SL-PRS according to the length of the time domain resources of the SL-PRS being M and the following conditions: the time domain resources of the SL-PRS are the last several consecutive symbols in a time slot that satisfy the length of M, and the SL-PRS resources do not conflict with the PT-RS resources. Further optionally, the first communication device obtains information about the PT-RS resources, such as the network device sending information about the PT-RS resources to the first communication device.

[0581] by Fig.12 For example, in (g), the density of PTRS is 4, then the number of symbols in PSCCH is 2, l d =13, the first communication device can determine the positions of PT-RS, DMRS and PSCCH symbols.

[0582] For example, if M=1, based on the above conditions, the first communications device may determine that the time domain resource of the SL-PRS is symbol 12 .

[0583] For another example, if M=2, based on the fact that the time domain resources of the SL-PRS are the last several consecutive symbols in a time slot that satisfy the length M, the first communication device can determine that the time domain resources of the SL-PRS are symbols 10 and 9. Fig.12 As can be seen from (g), the PT-RS and SL-PRS collide on symbol 10, that is, the time domain resources of the PT-RS include symbol 10. Therefore, one possible way is to send the SL-PRS on symbol 10 and not send the PT-RS, that is, the time domain resources of the SL-PRS include symbol 10 and symbol 9. Another possible way is to redetermine the time domain resources of the SL-PRS that meet the above conditions, such as symbol 9 and symbol 8.

[0584] For another example, if M=4, based on the fact that the time domain resources of the SL-PRS are the last several consecutive symbols in a time slot that satisfy the length M, the first communication device can determine that the time domain resources of the SL-PRS can be symbols 7 to 10. Fig.12 From (g) in FIG. 1 , it can be seen that the PT-RS and the SL-PRS collide on symbol 10, that is, the time domain resources of the PT-RS include symbol 10. Therefore, one possible way is to send the SL-PRS on symbol 10 and not send the PT-RS, that is, the time domain resources of the SL-PRS include symbols 7 to 10. Another possible way is to re-determine the time domain resources of the SL-PRS that meets the above conditions, by Fig.12 From (g), it can be seen that the length of the time domain resources of symbol 2 to symbol 5 that satisfies SL-PRS is M, but PT-RS and SL-PRS also conflict on symbol 2. Therefore, in this case, the former possible method can be adopted.

[0585] The above introduces the relevant solutions for avoiding the conflict between SL-PRS and PT-RS. The following introduces the solution on how to configure the number of SL-PRS resources.

[0586] As mentioned above, the identifier of the SL-PRS resource (or the SL-PRS resource) is determined according to at least one of the following: the length of the time domain resources that can be used to transmit the SL-PRS (i.e., Ma), the starting position of the time domain resources for transmitting the SL-PRS, and the length of the time domain resources for transmitting the SL-PRS (i.e., M), and Ma can be determined according to at least one of the following: the length of the time domain resources for transmitting the PSSCH (i.e., l d ), the length of the time domain resource used to transmit the PSCCH (i.e., l PSCCH ), the length of the time domain resources used to transmit PSFCH, and the length of the time domain resources used to transmit DMRS. Therefore, the SL-PRS resources may be determined according to at least one of the following: d , l PSCCH , DMRS pattern (DMRS pattern). As an exemplary illustration, some examples are listed below.

[0587] For example, d =13, DMRS pattern = 2 (that is, the number of DMRS patterns is 2), l PSCCH =2:{Configuration 1}.

[0588] For example, d =13,DMRS pattern=3,l PSCCH =2:{Configuration 2}.

[0589] For example, d =13,DMRS pattern=4,l PSCCH =2:{Configuration 3}.

[0590] For example, d =13,DMRS pattern=2,l PSCCH =3:{Configuration 4}.

[0591] For example, d =13,DMRS pattern=3,l PSCCH =3:{Configuration 5}.

[0592] For example, d =13,DMRS pattern=4,l PSCCH =3:{Configuration 6}.

[0593] For example, d=12,DMRS pattern=2,l PSCCH =2:{Configuration 7}.

[0594] For example, d =12, DMRS pattern=3, l PSCCH =2:{Configuration 8}.

[0595] For example, d =12, DMRS pattern=4, l PSCCH =2:{Configuration 9}.

[0596] For example, d =12,DMRS pattern=2,l PSCCH =3:{Configuration 10}.

[0597] For example, d =12, DMRS pattern=3, l PSCCH =3:{Configuration 11}.

[0598] For example, d =12, DMRS pattern=4, l PSCCH =3:{Configuration 12}.

[0599] For example, d =6, DMRS pattern = 2, l PSCCH =2:{Configuration 13}.

[0600] For example, d =6, DMRS pattern=3, l PSCCH =2:{Configuration 14}.

[0601] For example, d =6, DMRS pattern = 4, l PSCCH =2:{Configuration 15}.

[0602] For example, d =6, DMRS pattern = 2, l PSCCH =3:{Configuration 16}.

[0603] For example, d =6, DMRS pattern=3, l PSCCH =3:{Configuration 17}.

[0604] For example, d =6, DMRS pattern = 4, l PSCCH =3:{Configuration 18}.

[0605] It can be understood that the above are just some simple examples, and the embodiments of the present application are not limited to them.

[0606] In a possible implementation, the network device sends indication information #8 (ie, an example of the eighth indication information) to the first communication device, where the indication information #8 indicates at least one of the following: the length of the time domain resource used to transmit the PSSCH (ie, l d ), the length of the time domain resource used to transmit the PSCCH (i.e., l PSCCH ), DMRS pattern.

[0607] For example, indication information #8 includes at least one of the following: the length of the time domain resource used to transmit the PSSCH (ie, l d ), the length of the time domain resource used to transmit the PSCCH (i.e., l PSCCH ), DMRS pattern, therefore, the first communication device can obtain at least one of the above items based on the indication information #8, and determine which configuration the SL-PRS resource corresponds to based on the at least one of the above items and the above correspondence.

[0608] For another example, the indication information #8 includes the configuration corresponding to the SL-PRS resource (such as configuration i). Therefore, the first communication device can determine which configuration the SL-PRS resource corresponds to based on the indication information #8. In addition, the first communication device can also determine the length of the time domain resource for transmitting the PSSCH (i.e., l d ), the length of the time domain resource used to transmit the PSCCH (i.e., l PSCCH ), DMRS pattern.

[0609] Among them, configuration i (i=1~18) represents the relationship between the physical resource of SL-PRS in the time slot and the identifier of SL-PRS resource. Therefore, the first communication device can know which configuration of SL-PRS resource is based on indication information #8, and then can know the identifier of SL-PRS resource corresponding to the configuration, and then can know the physical resource of SL-PRS in the time slot based on the identifier. The following takes configuration i as an example and explains it in combination with several situations.

[0610] In a first possible scenario, configuration i includes: an N and an RE offset, and the SL-PRS resource identifier corresponds to the number of symbols M of configuration i.

[0611] Wherein, N represents the comb tooth size of the SL-PRS resource in the frequency domain, and as an example, the value of N may be 1, 2, or 4. Wherein, RE offset represents the offset of the SL-PRS resource in the frequency domain, which will not be described in detail later.

[0612] As an example, Among them, N0 represents the comb tooth size of the SL-PRS resource in the frequency domain, and the value of N0 can be 1, 2 or 4, for example.

[0613] Specifically, the SL-PRS resource identifier is 0, and the corresponding SL-PRS time domain resource length is M=1; the SL-PRS resource identifier is 1, and the corresponding SL-PRS time domain resource length is M=2; the SL-PRS resource identifier is 2, and the corresponding SL-PRS time domain resource length is M=4.

[0614] Based on this situation, no matter which identifier the SL-PRS resource is, the comb tooth size N of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset.

[0615] In a second possible scenario, configuration i includes: multiple Ns and an RE offset, and the SL-PRS resource identifier corresponds to the number of symbols M and the comb tooth size N of configuration i.

[0616] As an example:

[0617]

[0618]

[0619] Among them, the values ​​of N0 and N1 are different.

[0620] Specifically, the SL-PRS resource identifier is 0, the corresponding SL-PRS time domain resource length M = 1, and the SL-PRS resource comb tooth size in the frequency domain N = N0; the SL-PRS resource identifier is 1, the corresponding SL-PRS time domain resource length M = 2, and the SL-PRS resource comb tooth size in the frequency domain N = N0; the SL-PRS resource identifier is 2, the corresponding SL-PRS time domain resource length M = 4, and the SL-PRS resource comb tooth size in the frequency domain N = N0; the SL-PRS resource identifier is 3, the corresponding SL-PRS time domain resource length M=1, and the comb tooth size of the SL-PRS resource in the frequency domain is N=N1; the SL-PRS resource identifier is 4, the corresponding SL-PRS time domain resource length M=2, and the comb tooth size of the SL-PRS resource in the frequency domain is N=N1; the SL-PRS resource identifier is 5, the corresponding SL-PRS time domain resource length M=4, and the comb tooth size of the SL-PRS resource in the frequency domain is N=N1.

[0621] Based on this situation, no matter which identifier of the SL-PRS resource is, the offset of the SL-PRS resource in the frequency domain is REoffset.

[0622] In a third possible scenario, configuration i includes: multiple Ns and multiple RE offsets, and the SL-PRS resource identifier corresponds to the number of symbols M, the comb tooth size N, and the offset RE offset of configuration i.

[0623] As an example:

[0624]

[0625]

[0626]

[0627]

[0628] Among them, the values ​​of N0 and N1 are different, and the values ​​of RE offset 0 and RE offset 1 are different.

[0629] Specifically, the identifier of the SL-PRS resource is 0, the length of the corresponding SL-PRS time domain resource is M=1, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 1, the length of the corresponding SL-PRS time domain resource is M=2, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 2, the length of the corresponding SL-PRS time domain resource is M=4, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 3, the length of the corresponding SL-PRS time domain resource is M=1, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 4, the corresponding length of the SL-PRS time domain resource is M=2, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 5, the corresponding length of the SL-PRS time domain resource is M=4, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 0; the identifier of the SL-PRS resource is 6, the corresponding length of the SL-PRS time domain resource is M=1, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 1; the identifier of the SL-PRS resource is 7, the corresponding length of the SL-PRS time domain resource is M=2, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 1; the identifier of the SL-PRS resource is 8, the corresponding length of the SL-PRS time domain resource is M=4, the comb tooth size of the SL-PRS resource in the frequency domain is N=N0, and the offset of the SL-PRS resource in the frequency domain is RE offset 1; the identifier of the SL-PRS resource is 9, the corresponding length of the SL-PRS time domain resource is M=1, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 1; the identifier of the SL-PRS resource is 10, the corresponding length of the SL-PRS time domain resource is M=2, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 1;The identifier of the SL-PRS resource is 11, the length of the corresponding SL-PRS time domain resource is M=4, the comb tooth size of the SL-PRS resource in the frequency domain is N=N1, and the offset of the SL-PRS resource in the frequency domain is RE offset 1. ;

[0630] It can be understood that the above is an example and the present application is not limited thereto.

[0631] As mentioned above, the SL-PRS resource may be determined by the first communication device, or may be determined by the network device and indicated to the first communication device (eg, indicated by indication information #1). The following is a brief description using determination by the network device as an example.

[0632] Specifically, the network device determines the identifier of the SL-PRS resource, then the network device can send indication information #1 to the first communication device, and the indication information #1 indicates the identifier of the SL-PRS resource. Further, the network device or the first communication device can send indication information #3 to the second communication device, and the indication information # indicates the identifier of the SL-PRS resource.

[0633] For example, taking the first possible scenario as an example, the first communication device can determine the length M of the time domain resource of the SL-PRS based on the identifier of the SL-PRS resource and the above-mentioned correspondence. As mentioned above, the network device can send indication information #7 to the first communication device, and the indication information #7 indicates N and RE offset. Therefore, the first communication device can obtain relevant information of the SL-PRS resource, and then use the SL-PRS resource to send the SL-PRS to the second communication device.

[0634] Taking the example of the first communication device indicating the identifier of the SL-PRS resource to the second communication device, the second communication device can also determine the length M of the time domain resource of the SL-PRS based on the identifier of the SL-PRS resource and the above correspondence. The network device can also indicate N and RE offset to the second communication device, so that the second communication device can obtain relevant information of the SL-PRS resource, and then use the SL-PRS resource to receive the SL-PRS. The identifier of the SL-PRS resource indicated by the network device to the second communication device is similar and will not be repeated here.

[0635] For another example, taking the second possible scenario as an example, the first communication device can determine the length M and comb tooth size N of the SL-PRS time domain resource based on the identifier of the SL-PRS resource and the above correspondence. As mentioned above, the network device can send indication information #7 to the first communication device, and the indication information #7 indicates the RE offset. Therefore, the first communication device can obtain the relevant information of the SL-PRS resource, and then use the SL-PRS resource to send the SL-PRS to the second communication device.

[0636] Taking the example of the first communication device indicating the identifier of the SL-PRS resource to the second communication device, the second communication device can also determine the length M and comb tooth size N of the SL-PRS time domain resource based on the identifier of the SL-PRS resource and the above correspondence. The network device can also indicate the RE offset to the second communication device, so that the second communication device can obtain the relevant information of the SL-PRS resource, and then use the SL-PRS resource to receive the SL-PRS. The identifier of the SL-PRS resource indicated by the network device to the second communication device is similar and will not be repeated here.

[0637] For another example, taking the third possible scenario as an example, the first communication device can determine the length M, comb tooth size N, and offset RE offset of the SL-PRS time domain resource based on the identifier of the SL-PRS resource and the above correspondence. Therefore, the first communication device can obtain relevant information of the SL-PRS resource, and then use the SL-PRS resource to send the SL-PRS to the second communication device.

[0638] Taking the example of the first communication device indicating the identifier of the SL-PRS resource to the second communication device, the second communication device can also determine the length M, comb tooth size N, and offset RE offset of the SL-PRS time domain resource based on the identifier of the SL-PRS resource and the above correspondence. Therefore, the second communication device can obtain the relevant information of the SL-PRS resource, and then use the SL-PRS resource to receive the SL-PRS. The identifier of the SL-PRS resource indicated by the network device to the second communication device is similar and will not be repeated here.

[0639] It can be understood that in the above embodiments, SL-PRS resources are mentioned multiple times, which means resources used to transmit SL-PRS.

[0640] It can also be understood that in the above embodiments, the SL-PRS is mainly used as an example for illustration. It can be understood that the SL-PRS can be replaced by other reference signals.

[0641] It can also be understood that in the above embodiments, the number of transmissions and the maximum number of reservations (or simply the number of reservations) are mentioned many times. Among them, the maximum number of reservations can also be called the number of retransmissions. Taking SL-PRS as an example, assuming that the number of transmissions of SL-PRS is S, S is an integer greater than 1 or equal to 1, which indicates that the sum of the number of initial transmissions and retransmissions of SL-PRS is S. Specifically, if S is 1, it means that SL-PRS is transmitted once; if S is greater than 1, it means that SL-PRS is initially transmitted once and retransmitted (S-1) times, that is, the maximum number of reservations is (S-1). As an example, a communication device (such as a first communication device and / or a second communication device) can receive configuration information on a time domain unit (such as a time slot) where the initial transmission is located, and the configuration information includes the maximum number of reservations. It can be understood that in actual transmission, the maximum number of reservations indicated in the configuration information may be different from the actual number of retransmissions, for example, the actual number of retransmissions is less than the maximum number of reservations, and this is not limited.

[0642] It can also be understood that the formulas involved in the various embodiments of the present application are only exemplary descriptions, and do not limit the protection scope of the embodiments of the present application. In the process of calculating the above-mentioned various parameters involved, the calculation can also be performed according to the above formula, or based on the deformation of the above formula, or according to other methods to satisfy the result of the formula calculation.

[0643] It can also be understood that some optional features in the embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0644] It can also be understood that the solutions in the various embodiments of the present application can be used in reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be mutually referenced or explained in the various embodiments, without limitation.

[0645] It can also be understood that in the above-mentioned various method embodiments, the methods and operations implemented by the communication device can also be implemented by components (such as chips or circuits) that can be implemented by the communication device.

[0646] Corresponding to the methods given in the above-mentioned method embodiments, the embodiments of the present application also provide corresponding devices, which include modules for executing the corresponding methods in the above-mentioned method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above-mentioned method embodiments are also applicable to the following device embodiments.

[0647] Combine the following Figures 13 to 15It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and will not be repeated here for the sake of brevity.

[0648] Fig.13 1 is a schematic block diagram of a communication device 1300 provided in an embodiment of the present application. The device 1300 includes a transceiver unit 1310 and a processing unit 1320. The transceiver unit 1310 can be used to implement corresponding communication functions. The transceiver unit 1310 can also be called a communication interface or a communication unit. The processing unit 1320 can be used to perform data processing, such as generating an identifier of a resource.

[0649] Optionally, the device 1300 also includes a storage unit, which can be used to store instructions and / or data. The processing unit 1320 can read the instructions and / or data in the storage unit so that the device implements the actions of the terminal device in the aforementioned method embodiments.

[0650] In one design, the device 1300 may be the first communication device in the aforementioned embodiment, or may be a component (such as a chip) of the first communication device. The device 1300 may implement the steps or processes corresponding to those performed by the first communication device in the above method embodiment, wherein the transceiver unit 1310 may be used to perform the transceiver-related operations of the first communication device in the above method embodiment, and the processing unit 1320 may be used to perform the processing-related operations of the first communication device in the above method embodiment.

[0651] In one possible implementation, the processing unit 1320 is used to obtain an identifier of a first resource, where the first resource is used to transmit a sidelink positioning reference signal, and the identifier of the first resource is determined based on at least one of the following: the length of the time domain resources that can be used to transmit the sidelink positioning reference signal, the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal; the transceiver unit 1310 is used to use the first resource to send the sidelink positioning reference signal.

[0652] In another possible implementation, the processing unit 1320 is used to acquire a first resource, where the first resource is used to transmit a sidelink positioning reference signal, and the first resource includes T transmission resources, where at least two of the T transmission resources are discontinuous in the time domain, and T is an integer greater than 1; the transceiver unit 1310 is used to send indication information, where the indication information indicates at least one transmission resource in the first resources, and at least one transmission resource in the first resources is used to transmit a sidelink positioning reference signal.

[0653] The device 1300 may implement the steps or processes performed by the first communication device in the method embodiment according to the embodiment of the present application. The device 1300 may include a method for performing Figures 7 to 12 The units of the method executed by the first communication device in the illustrated embodiment.

[0654] In another design, the device 1300 may be the second communication device in the aforementioned embodiment, or may be a component (such as a chip) of the second communication device. The device 1300 may implement the steps or processes corresponding to those performed by the second communication device in the above method embodiment, wherein the transceiver unit 1310 may be used to perform the transceiver-related operations of the second communication device in the above method embodiment, and the processing unit 1320 may be used to perform the processing-related operations of the second communication device in the above method embodiment.

[0655] In one possible implementation, the transceiver unit 1310 is used to receive a first resource or an identifier of a first resource; the transceiver unit 1310 is also used to receive a sidelink positioning reference signal using the first resource, and the identifier of the first resource is determined based on at least one of the following: the length of the time domain resources that can be used to transmit the sidelink positioning reference signal, the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and the length of the time domain resources used to transmit the sidelink positioning reference signal.

[0656] Another possible implementation method is that the transceiver unit 1310 is used to receive indication information, where the indication information indicates at least one transmission resource in the first resources, the first resource is used to transmit a sidelink positioning reference signal, the first resource includes T transmission resources, at least two of the T transmission resources are discontinuous in the time domain, and T is an integer greater than 1; the transceiver unit 1310 is also used to receive the sidelink positioning reference signal.

[0657] The device 1300 may implement the steps or processes performed by the second communication device in the method embodiment according to the embodiment of the present application. The device 1300 may include a method for performing Figures 7 to 12 The units of the method executed by the second communication device in the illustrated embodiment.

[0658] A more detailed description of the device 1300 can be directly obtained by referring to the relevant description in the above method embodiment, which will not be repeated here.

[0659] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0660] It should also be understood that the device 1300 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 1300 can be specifically a communication device (such as a first communication device, and also such as a second communication device) in the above-mentioned embodiments, and can be used to execute the various processes and / or steps corresponding to the communication device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here.

[0661] The device 1300 of each of the above schemes has the function of implementing the corresponding steps performed by the communication device (such as the first communication device, and the second communication device) in the above method. The function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0662] In addition, the transceiver unit 1310 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0663] It should be pointed out that Fig.13 The device in the above-mentioned embodiment may be a device, or a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.

[0664] Fig.14 1 is a schematic block diagram of a communication device 1400 provided in an embodiment of the present application. The device 1400 includes a processor 1410, and the processor 1410 is coupled to a memory 1440. Optionally, the memory 1440 is further included, which is used to store computer programs or instructions and / or data. The processor 1410 is used to execute the computer programs or instructions stored in the memory 1440, or read the data stored in the memory 1440, so as to execute the methods in the above method embodiments.

[0665] Optionally, there are one or more processors 1410 .

[0666] Optionally, the memory 1440 is one or more.

[0667] Optionally, the memory 1440 is integrated with the processor 1410 or provided separately.

[0668] Alternatively, if Fig.14 As shown, the device 1400 further includes a transceiver 1430, which is used to receive and / or send signals. For example, the processor 1410 is used to control the transceiver 1430 to receive and / or send signals.

[0669] As a solution, the device 1400 is used to implement the operations performed by the communication device in each of the above method embodiments.

[0670] For example, the processor 1410 is configured to execute a computer program or instruction stored in the memory 1440 to implement related operations of the first communication device or the second communication device in each of the above method embodiments.

[0671] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 1410 or an instruction in the form of software. The method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1440, and the processor 1410 reads the information in the memory 1440 and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0672] It should be understood that in the embodiments of the present application, the processor may be one or more integrated circuits for executing related programs to execute the embodiments of the methods of the present application.

[0673] The processor (e.g., processor 1410) may include one or more processors and be implemented as a combination of computing devices. The processor may include one or more of the following: a microprocessor, a microcontroller, a digital signal processor (DSP), a digital signal processing device (DSPD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a programmable logic device (PLD), a gating logic, a transistor logic, a discrete hardware circuit, a processing circuit or other suitable hardware, firmware and / or a combination of hardware and software for performing the various functions described in the present disclosure. The processor may be a general-purpose processor or a dedicated processor. For example, processor 1410 may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data. The central processing unit may be used to enable the device to execute a software program and process data in the software program. In addition, a portion of the processor may also include a non-volatile random access memory. For example, the processor may also store information about the type of device.

[0674] Program in this application is used to refer to software in a broad sense. Non-limiting examples of software include: program code, program, subroutine, instruction, instruction set, code, code segment, software module, application, or software application, etc. The program can be run in a processor and / or computer. So that the device performs various functions and / or processes described in this application.

[0675] The memory (e.g., memory 1440) can store data required by the processor (e.g., processor 1410) when executing software. The memory can be implemented using any suitable storage technology. For example, the memory can be any available storage medium that can be accessed by the processor and / or computer. Non-limiting examples of storage media include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM), removable media, optical disk storage, magnetic disk storage media, magnetic storage devices, flash memory, registers, state memory, remote mounted storage, local or remote storage components, or any other medium capable of carrying or storing software, data or information and accessible by a processor / computer. It should be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0676] The memory (e.g., memory 1440) and the processor (e.g., processor 1410) may be provided separately or integrated together. The memory may be used to connect to the processor so that the processor can read information from the memory and store and / or write information in the memory. The memory may be integrated in the processor. The memory and the processor may be provided in an integrated circuit (e.g., the integrated circuit may be provided in a UE or other network node).

[0677] Fig.15 1 is a schematic block diagram of a chip system 1500 provided in an embodiment of the present application. The chip system 1500 (or also referred to as a processing system) includes a logic circuit 1510 and an input / output interface 1520 .

[0678] Among them, the logic circuit 1510 can be a processing circuit in the chip system 1500. The logic circuit 1510 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 1500 can implement the methods and functions of each embodiment of the present application. The input / output interface 1520 can be an input / output circuit in the chip system 1500, outputting information processed by the chip system 1500, or inputting data or signaling information to be processed into the chip system 1500 for processing.

[0679] As a solution, the chip system 1500 is used to implement the operations performed by the communication device in the above method embodiments.

[0680] For example, the logic circuit 1510 is used to implement the processing-related operations performed by the first communication device in the above method embodiment, such as: Figure 7 The processing-related operations performed by the first communication device in the illustrated embodiment; the input / output interface 1520 is used to implement the sending and / or receiving-related operations performed by the first communication device in the above method embodiment, such as, Figure 7 The first communication device in the illustrated embodiment performs operations related to sending and / or receiving.

[0681] For another example, the logic circuit 1410 is used to implement the processing-related operations performed by the second communication device in the above method embodiment, such as: Figure 7 The processing-related operations performed by the second communication device in the embodiment shown; the input / output interface 1420 is used to implement the sending and / or receiving-related operations performed by the second communication device in the above method embodiment, such as Figure 7 The second communication device in the illustrated embodiment performs operations related to sending and / or receiving.

[0682] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the methods executed by a communication device (such as a first communication device or a second communication device) in the above-mentioned method embodiments are stored.

[0683] An embodiment of the present application further provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by a communication device (such as a first communication device or a second communication device) in the above-mentioned method embodiments.

[0684] An embodiment of the present application further provides a communication system, which includes the first communication device and the second communication device in the above embodiments.

[0685] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0686] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0687] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement the solution provided by this application.

[0688] In addition, each functional unit in each embodiment of the present application may be integrated into one unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0689] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0690] When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server, or a data center to another website site, a computer, a server, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. For computer-readable storage media, reference can be made to the above description. The above description is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: Acquire an identifier of a first resource, where the first resource is used to transmit a sidelink positioning reference signal, and the identifier of the first resource is determined according to at least one of the following: a length of a time domain resource that can be used to transmit the sidelink positioning reference signal, a starting position of the time domain resource used to transmit the sidelink positioning reference signal, and a length of the time domain resource used to transmit the sidelink positioning reference signal; The sidelink positioning reference signal is sent using the first resource.

2. The method according to claim 1, characterized in that Obtaining the identifier of the first resource includes: receiving first indication information, where the first indication information indicates an identifier of the first resource; or, The method of claim 14 , wherein the method determines an identifier of the first resource by itself.

3. The method according to claim 1 or 2, characterized in that: The length of the time domain resource that can be used to transmit the sidelink positioning reference signal is determined according to at least one of the following: The length of the time domain resources used to transmit the physical sideline shared channel PSSCH, the length of the time domain resources used to transmit the physical sideline control channel PSCCH, the length of the time domain resources used to transmit the physical sideline feedback channel PSFCH, and the length of the time domain resources used to transmit the demodulation reference signal DMRS.

4. The method according to any one of claims 1 to 3, characterized in that The length of the time domain resource that can be used to transmit the sidelink positioning reference signal satisfies any one of the following: Ma=l d -L PSCCH -X1, Ma=l d -L PSCCH -L DMRS –X2, <h2 style=";text-align:left;direction:ltr">Ma=l<h2 style=";text-align:left;direction:ltr"> d <h2 style=";text-align:left;direction:ltr"> –X3; Wherein, Ma represents the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, l d Indicates the length of the time domain resource used to transmit PSSCH, l PSCCH Indicates the length of the time domain resource used to transmit PSCCH, l DMRS represents the length of the time domain resource used to transmit the demodulation reference signal DMRS, and X1, X2, and X3 are constants.

5. The method according to claim 4, characterized in that The value of X1 is any of the following: 0, 1, 2 or 3; and / or, The value of X2 is 0 or 1; and / or, The value of X3 is 0 or 1.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: receiving second indication information, where the second indication information indicates at least one of the following: a starting position of the time domain resource used to transmit the sidelink positioning reference signal, and a length of the time domain resource used to transmit the sidelink positioning reference signal; or, Determine at least one of the following: the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the length of the time domain resource used to transmit the sidelink positioning reference signal.

7. The method according to any one of claims 1 to 6, characterized in that: The identifier of the first resource is obtained by encoding the length of the time domain resource that can be used to transmit the sidelink positioning reference signal.

8. The method according to claim 7, characterized in that The identifier of the first resource satisfies any of the following: n id =S start , n id = S start + Ma, or n id =S start +2Ma-1, Among them, n id represents the identifier of the first resource, S start It represents the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and Ma represents the length of the time domain resources that can be used to transmit the sidelink positioning reference signal.

9. The method according to claim 7 or 8, characterized in that: The first resource is also determined based on at least one of the following: a time domain resource used to transmit a sidelink reference signal, a time domain resource used to transmit sidelink feedback information, and a time domain resource used to transmit a PSSCH.

10. The method according to claim 9, characterized in that The obtaining the identifier of the first resource includes: Obtaining identifiers of N resources by encoding the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, where N is an integer greater than 1; The identifier of the first resource is determined based on the identifiers of the N resources and a preset rule, and the preset rule indicates that: the first resource is a continuous resource, and / or, the first resource does not include one of the following indications: the time domain resource for transmitting the sidelink reference signal, the time domain resource for transmitting the sidelink feedback information, and the time domain resource for transmitting the PSSCH.

11. The method according to any one of claims 1 to 6, characterized in that The value of the identifier of the first resource is W bits, the W bits include a first bit and a second bit, W is an integer greater than 1, and the identifier of the first resource satisfies any of the following: The first bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the second bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, The second bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the first bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, The identifier of the first resource is obtained by jointly encoding the length of the time domain resource used to transmit the sidelink positioning reference signal and the starting position of the time domain resource used to transmit the sidelink positioning reference signal.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: Send third indication information, where the third indication information indicates: the first resource or an identifier of the first resource.

13. The method according to claim 12, characterized in that The third indication information includes at least one of the following: an identifier of the first resource, a starting position of the first resource in the time domain, a length of the first resource in the time domain, an ending position of the first resource in the time domain, an offset of the first resource in the frequency domain, and a comb tooth size of the first resource in the frequency domain.

14. The method according to claim 13, characterized in that The first resource includes a first transmission resource and a second transmission resource, the first transmission resource and the second transmission resource are discontinuous in the time domain, and the third indication information includes an offset of the first resource in the frequency domain. The offset of the first resource in the frequency domain includes the offset of the first transmission resource in the frequency domain and / or the offset of the second transmission resource in the frequency domain.

15. The method according to any one of claims 1 to 14, characterized in that The method further comprises: receiving fourth indication information, where the fourth indication information indicates a second resource; Obtaining the identifier of the first resource includes: The first resource is determined according to the second resource and available resources, and a length of the first resource in the time domain resource is shorter than a length of the second resource in the time domain resource.

16. The method according to claim 15, characterized in that The using the first resource to send the sidelink positioning reference signal includes: Based on the length of the first resource in the time domain resource, the sidelink positioning reference signal is transmitted in a completely staggered manner; or, Based on the length of the second resource in the time domain resource, the sidelink positioning reference signal is transmitted on the first resource in a partially staggered manner.

17. The method according to any one of claims 1 to 16, characterized in that The method further comprises: Reservation information is sent in a first time slot where the first resource is located, the reservation information indicates at least one second time slot, the second time slot is a time slot where the data packet is retransmitted, and the first time slot and / or the second time slot also includes a second resource for transmitting the sidelink positioning reference signal.

18. The method according to any one of claims 1 to 17, characterized in that The first resource overlaps with a third resource, and the third resource is used to transmit a sidelink reference signal. The method further includes: The sidelink reference signal is sent using resources in the third resources that do not overlap with the first resources.

19. The method according to any one of claims 1 to 17, characterized in that The first resource is a candidate resource among k candidate resources, where k is an integer greater than 1, and the first resource does not overlap with a third resource, and the third resource is used to transmit a sidelink reference signal.

20. The method according to claim 19, characterized in that The obtaining the identifier of the first resource includes: Receiving configuration information of the third resource and configuration information of the k candidate resources; An identifier of the first resource is determined according to the configuration information of the third resource and the configuration information of the k candidate resources.

21. A communication method, characterized in that: include: The second communication device receives the first resource or the identifier of the first resource, where the identifier of the first resource is determined according to at least one of the following: the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the length of the time domain resource used to transmit the sidelink positioning reference signal; The second communication device receives the sidelink positioning reference signal using the first resource.

22. The method according to claim 21, characterized in that The method further comprises: The second communication device obtains positioning-related information according to the sidelink positioning reference signal.

23. The method according to claim 21 or 22, characterized in that The length of the time domain resource that can be used to transmit the sidelink positioning reference signal is determined according to at least one of the following: The length of the time domain resources used to transmit the physical sideline shared channel PSSCH, the length of the time domain resources used to transmit the physical sideline control channel PSCCH, the length of the time domain resources used to transmit the physical sideline feedback channel PSFCH, and the length of the time domain resources used to transmit the demodulation reference signal DMRS.

24. The method according to any one of claims 21 to 23, characterized in that The length of the time domain resource that can be used to transmit the sidelink positioning reference signal satisfies any one of the following: Ma=l d -L PSCCH -X1, Ma=l d -L PSCCH -L DMRS –X2, <h2 style=";text-align:left;direction:ltr">Ma=l<h2 style=";text-align:left;direction:ltr"> d <h2 style=";text-align:left;direction:ltr"> –X3; Wherein, Ma represents the length of the time domain resource that can be used to transmit the sidelink positioning reference signal, l d Indicates the length of the time domain resource used to transmit PSSCH, l PSCCH Indicates the length of the time domain resource used to transmit PSCCH, l DMRS represents the length of the time domain resource used to transmit the demodulation reference signal DMRS, and X1, X2, and X3 are constants.

25. The method according to claim 24, characterized in that The value of X1 is any of the following: 0, 1, 2 or 3; and / or, The value of X2 is 0 or 1; and / or, The value of X3 is 0 or 1.

26. The method according to any one of claims 21 to 25, characterized in that The method further comprises: The second communication device receives second indication information, and the second indication information indicates at least one of the following: the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the length of the time domain resource used to transmit the sidelink positioning reference signal.

27. The method according to any one of claims 21 to 26, characterized in that: The identifier of the first resource is obtained by encoding the length of the time domain resource that can be used to transmit the sidelink positioning reference signal.

28. The method according to claim 27, characterized in that The identifier of the first resource satisfies any of the following: n id =S start , n id = S start + Ma, or n id =S start +2Ma-1, Among them, n id represents the identifier of the first resource, S start It represents the starting position of the time domain resources used to transmit the sidelink positioning reference signal, and Ma represents the length of the time domain resources that can be used to transmit the sidelink positioning reference signal.

29. The method according to any one of claims 21 to 26, characterized in that The value of the identifier of the first resource is W bits, the W bits include a first bit and a second bit, W is an integer greater than 1, and the identifier of the first resource satisfies any of the following: The first bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the second bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, The second bit of the identifier of the first resource is related to the starting position of the time domain resource used to transmit the sidelink positioning reference signal, and the first bit of the identifier of the first resource is related to the length of the time domain resource used to transmit the sidelink positioning reference signal; or, The identifier of the first resource is obtained by jointly encoding the length of the time domain resource used to transmit the sidelink positioning reference signal and the starting position of the time domain resource used to transmit the sidelink positioning reference signal.

30. The method according to any one of claims 21 to 29, characterized in that The second communication device receives an identifier of the first resource, including: The second communication device receives third indication information, where the third indication information indicates an identifier of the first resource.

31. The method according to claim 30, characterized in that The third indication information includes at least one of the following: an identifier of the first resource, a starting position of the first resource in the time domain, a length of the first resource in the time domain, an ending position of the first resource in the time domain, an offset of the first resource in the frequency domain, and a comb tooth size of the first resource in the frequency domain.

32. The method according to claim 31, characterized in that The first resource includes a first transmission resource and a second transmission resource, the first transmission resource and the second transmission resource are discontinuous in the time domain, and the third indication information includes an offset of the first resource in the frequency domain. The offset of the first resource in the frequency domain includes the offset of the first transmission resource in the frequency domain and / or the offset of the second transmission resource in the frequency domain.

33. The method according to any one of claims 21 to 32, characterized in that The first resource overlaps with a third resource, and the third resource is used to transmit a sidelink reference signal. The method further includes: The sidelink reference signal is received using resources in the third resources that do not overlap with the first resources.

34. The method according to any one of claims 21 to 33, characterized in that The first resource is a candidate resource among k candidate resources, where k is an integer greater than 1, and the first resource does not overlap with a third resource, and the third resource is used to transmit a sidelink reference signal.

35. A communication device, characterized in that: The method comprises modules or units for executing the method according to any one of claims 1 to 34.

36. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to execute a computer program or instruction stored in a memory so that the device performs the method according to any one of claims 1 to 34.

37. The device according to claim 36, characterized in that The device further comprises the memory and / or the communication interface, wherein the communication interface is coupled to the processor. The communication interface is used to input and / or output information.

38. The device according to claim 36 or 37, characterized in that The device is a chip.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instructions, and when the computer program or instructions are executed on a communication device, the communication device is caused to perform the method according to any one of claims 1 to 34.

40. A computer program product, characterized in that The computer program product comprises a computer program or instructions for performing the method of any one of claims 1 to 34.

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