Method and device for indicating positioning reference signal resources

Abstract

The present application provides a method and device for indicating positioning reference signal resources. The method includes: using side link control information SCI to indicate positioning reference signal resources, and the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field; wherein the resource pool indication field is used to indicate the target resource pool for transmitting the positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each target resource pool, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each target resource pool. This solution solves the problem that the SCI in the prior art cannot realize the indication of the sidelink positioning reference signal resources.

Description

Technical Field

[0001] The present application relates to the field of sidelink communications, and in particular, to a method and device for indicating positioning reference signal resources. Background Art

[0002] The overall design concept of NR sidelink is similar to that of LTE sidelink, which is mainly based on direct communication and correspondingly extends the 5G NR network capabilities, that is, the sidelink design is based on NR uplink. Considering the complexity and gain of implementation, only CP-OFDM (CyclePrefix-Orthogonal Frequency Division Multiplexing) waveform is supported, and sidelink transmission based on DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) waveform is not supported.

[0003] In order to balance efficiency and fairness, and to achieve flexible use and indication of resources, NR sidelink introduces Sidelink Control Information (SCI), which is designed similarly to DCI and aims to indicate the resources occupied by UE and modulation coding information. However, the existing SCI cannot indicate the sidelink positioning reference signal resources. Summary of the invention

[0004] The main purpose of the present application is to provide a method and device for indicating positioning reference signal resources, so as to solve the problem in the prior art that SCI cannot indicate sidelink positioning reference signal resources.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for indicating positioning reference signal resources is provided, including: using side link control information SCI to indicate positioning reference signal resources, the SCI carries: a resource pool indication field, a time domain resource indication field and a frequency domain resource indication field; wherein the resource pool indication field is used to indicate a target resource pool for transmitting a positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools.

[0006] Optionally, the SCI also carries a frequency hopping indication field, and uses side link control information SCI to indicate positioning reference signal resources, including: the frequency hopping indication field is used to indicate whether the user equipment UE sending the SCI adopts a frequency hopping method to transmit the positioning reference signal.

[0007] Optionally, the SCI also carries a transmission strategy indication field, and uses side link control information SCI to indicate positioning reference signal resources, including: the transmission strategy indication field is used to indicate that the transmission mode of the positioning reference signal on the target resource pool is one of the following: new transmission, retransmission, and repetition when the frequency hopping indication field indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal.

[0008] Optionally, the resource pool indication field indicates the target resource pool for transmitting the positioning reference signal in any of the following ways: the resource pool indication field indicates the target resource pool in a bitmap manner, each bit of the bitmap is associated with the index of the resource pool, and the value of each bit of the bitmap is used to indicate whether each resource pool is the target resource pool; the resource pool indication field directly indicates the index of the target resource pool used to transmit the positioning reference signal.

[0009] Optionally, the resource pool indication field directly indicates an index of the target resource pool used to transmit the positioning reference signal, including one of the following:

[0010] When the total number N of resource pools is not a positive integer power of 2, the number of bits in the resource pool indication field is a preset value S, and the first (k-1) bits of the resource pool indication field are bits are used to indicate the index of the target resource pool, where k is an integer greater than 1. bits are a group used to indicate an index of the target resource pool, and the kth group The value of the bit meets the preset end condition;

[0011] The number of bits in the resource pool indication field is Where M represents the total number of target resource pools, N represents the total number of resource pools, and each A group of bits is used to indicate an index of the target resource pool.

[0012] Optionally, using side link control information SCI to indicate a positioning reference signal resource includes:

[0013] Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool, or indicating the time slot offset between the time domain starting point of each of the positioning reference signal resources and the SCI;

[0014] Using the second offset indication field in the time domain resource indication field to indicate the symbol offset between the first symbol of the positioning reference signal in each of the target resource pools and the time domain starting point of the time slot where the positioning reference signal is located;

[0015] Using the slot number indication field in the time domain resource indication field to indicate the number of time slots occupied by the positioning reference signal in each of the target resource pools;

[0016] The symbol number indication field in the time domain resource indication field is used to indicate the number of symbols occupied by the positioning reference signal in each of the target resource pools in the time slot.

[0017] Optionally, using a first offset indication field in the time domain resource indication field to indicate a time slot offset between a time domain starting point of the positioning reference signal resource in each of the target resource pools and a time domain starting point of the target resource pool includes:

[0018] The first offset indicates the domain occupied bits, where M represents the total number of the target resource pools, and P represents the maximum value of the time domain length of the target resource pool, where the unit of the time domain length is time slot;

[0019] and / or,

[0020] Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of each positioning reference signal resource and the SCI, including:

[0021] The first offset indicates the domain occupied bits, where M represents the total number of the target resource pool, and the distance between the positioning reference signal resource indicated by the SCI and the SCI does not exceed Q time slots.

[0022] Optionally, using side link control information SCI to indicate a positioning reference signal resource includes:

[0023] Using the third offset indication field in the frequency domain resource indication field to indicate the subchannel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool;

[0024] Using the fourth offset indication field in the frequency domain resource indication field to indicate the resource block offset between the first resource block of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the subchannel where the first resource block is located;

[0025] The frequency domain bandwidth indication field in the frequency domain resource indication field is used to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools.

[0026] Optionally, using a third offset indication field in the frequency domain resource indication field to indicate a subchannel offset between a frequency domain starting point of the positioning reference signal resource in each of the target resource pools and a frequency domain starting point of the target resource pool includes:

[0027] The third offset indication domain occupies bits, where M represents the total number of the target resource pools, and W represents the maximum value of the frequency domain length of the target resource pool, where the unit of the frequency domain length is subchannel.

[0028] Optionally, when the SCI is a second-type SCI, the side link control information SCI is used to indicate the positioning reference signal resources, including: the time slot offset between the time domain starting point of the positioning reference signal resources in each of the target resource pools and the time domain starting point of the target resource pool is determined according to the time slot offset between the time domain starting point of the positioning reference signal resources located in the same time slot as the SCI and the time domain starting point of the target resource pool where the positioning reference signal resources are located; and / or, the sub-channel offset between the frequency domain starting point of the positioning reference signal resources in each of the target resource pools and the frequency domain starting point of the target resource pool is determined according to the sub-channel offset between the frequency domain starting point of the positioning reference signal resources located in the same time slot as the SCI and the frequency domain starting point of the target resource pool where the positioning reference signal resources are located.

[0029] Optionally, using the frequency domain bandwidth indication field in the frequency domain resource indication field to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools includes:

[0030] Frequency domain bandwidth indication domain occupancy bits, where M represents the total number of the target resource pools, Z represents the upper limit of the frequency domain length of the target resource pool, and the unit of the frequency domain length is a subchannel or a resource block;

[0031] or,

[0032] In the case that the bandwidths occupied by the positioning reference signal resources in different target resource pools are the same, the values ​​of a preset number of bits in the frequency domain resource indication field are used to indicate the bandwidth occupied by the positioning reference signal resources in each target resource pool, wherein there is a corresponding relationship between the values ​​of the preset number of bits and the bandwidth occupied by the positioning reference signal.

[0033] Optionally, when the SCI is a second-type SCI, M does not include the current target resource pool, and at least part of the SL PRS associated with the second-type SCI is located in the same time slot as the second-type SCI, and / or the method further includes: using a numerical indication field carried in the SCI to indicate the value of M.

[0034] Optionally, the target resource pool is a positioning-dedicated resource pool, or the target resource pool includes both a positioning-dedicated resource pool and a non-positioning-dedicated resource pool; and / or the SCI also carries a positioning request information indication field, and the positioning request information indication field is used to indicate that the user equipment UE sending the SCI requests to initiate a positioning process, or is used to indicate that the UE sending the SCI requests to terminate the positioning process; and / or, the SCI is a two-level structure, and the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field are carried in the first-level SCI, and the SCI is multiplexed on the basis of SCIformat 1-A, and a multiplexing indication bit is added to the SCI, and the multiplexing indication bit is used to indicate whether the resources indicated by the current SCI are used for the transmission of the positioning reference signal.

[0035] According to another aspect of the present application, a device for indicating positioning reference signal resources is provided, comprising: a first indication unit, which uses side link control information SCI to indicate positioning reference signal resources, and the SCI carries: a resource pool indication field, a time domain resource indication field and a frequency domain resource indication field; wherein the resource pool indication field is used to indicate a target resource pool for transmitting a positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools.

[0036] By applying the technical solution of the present application, the side link control information SCI carrying the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field is adopted to realize the indication of the positioning reference signal resources, thereby solving the problem that the SCI in the prior art cannot realize the indication of the sidelink positioning reference signal resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 A flow chart of a method for indicating positioning reference signal resources according to an embodiment of the present application is shown;

[0039] Figure 2 A schematic diagram of a positioning reference signal resource indication device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0044] For the convenience of description, some nouns or terms involved in the embodiments of the present application are explained below:

[0045] New transmission: Different positioning resources are transmitted on different resource pools. At this time, each positioning resource is a new transmission (each positioning resource has a different identifier, such as a positioning reference signal resource ID);

[0046] Retransmission: The same positioning resource is transmitted on different resource pools. In this case, the first resource pool in the time domain is a new transmission, and the remaining resource pools are retransmissions (at this time, the positioning resources corresponding to all resource pools have the same identifier, such as the positioning reference signal resource ID). The resource pool used for retransmission may not actually be used, that is, whether to transmit the positioning reference signal depends on the UE implementation;

[0047] Repeat: The same positioning resource is transmitted on different resource pools. In this case, the first resource pool in the time domain is newly transmitted, and the remaining resource pools are repeated (at this time, the positioning resources corresponding to all resource pools have the same identifier, such as the positioning reference signal resource ID). The resource pool used for repetition must transmit the positioning reference signal.

[0048] According to an embodiment of the present application, a method for indicating positioning reference signal resources is provided.

[0049] Figure 1 is a flow chart of a method for indicating positioning reference signal resources according to an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0050] Step S101, using side link control information SCI to indicate positioning reference signal resources, the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field;

[0051] Among them, the resource pool indication field is used to indicate the target resource pool for transmitting the positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools.

[0052] The method for indicating positioning reference signal resources of the present application uses the side link control information SCI that carries a resource pool indication field, a time domain resource indication field and a frequency domain resource indication field to realize the indication of positioning reference signal resources, thereby solving the problem that the SCI in the prior art cannot realize the indication of sidelink positioning reference signal resources.

[0053] In the existing design of sidelink positioning resource pool, 3GPP has two tendencies (it has not yet determined which one to use, or it may use both), one is to transmit the positioning reference signal on a dedicated resource pool, and the other is a shared resource pool solution, that is, there is no lack of resource pools for positioning reference signals and existing signals / channels. Regardless of whether the positioning reference signal adopts a dedicated resource pool or a shared resource pool solution, its frequency domain resources will be limited and cannot be transmitted with a large bandwidth, affecting the positioning performance. This application avoids the above defects.

[0054] Furthermore, the SCI also carries a frequency hopping indication field, and uses the side link control information SCI to indicate the positioning reference signal resource, including: the frequency hopping indication field is used to indicate whether the user equipment UE sending the SCI adopts a frequency hopping method to transmit the positioning reference signal.

[0055] The frequency hopping indication field in the side link control information SCI is used to indicate the positioning reference signal resource, including: when the value in the frequency hopping indication field is the first value, it indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal; when the value in the frequency hopping indication field is the second value, it indicates that the UE sending the SCI uses the frequency hopping method to transmit the positioning reference signal. For example, the first value is set to 0, and the second value is set to 1. Of course, the first value can also be set to 1, and the second value can also be set to 0. Of course, it can also be set to other values. As long as the first value and the second value are distinguished, it will be fine.

[0056] Furthermore, the SCI also carries a transmission strategy indication field, which uses side link control information SCI to indicate positioning reference signal resources, including: the transmission strategy indication field is used to indicate that the transmission mode of the positioning reference signal on the target resource pool is one of the following: new transmission, retransmission, and repetition when the frequency hopping indication field indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal.

[0057] Further, the transmission strategy indication field is valid only when the value of the frequency hopping indication bit is the first value, and is used to indicate that, except for the first resource pool in the time domain, the positioning reference signal on other resource pools is a new transmission or a retransmission (re-transmission) or a repetition (repetition). For example: 1) occupies 2 bits. For example, when the value corresponding to the 2 bits is 00, it indicates that the positioning reference signal on other resource pools is a new transmission, when the value corresponding to the 2 bits is 01, it indicates that the positioning reference signal on other resource pools is a retransmission, and when the value corresponding to the 2 bits is 11, it indicates that the positioning reference signal on other resource pools is a repetition; 2) Or, occupies 1 bit. For example, when the bit value is 0, it indicates that the positioning reference signal on other resource pools is non-repetitive, and when the bit value is 1, it indicates that the positioning reference signal on other resource pools is a repetition.

[0058] In some embodiments, the resource pool indication field indicates a target resource pool for transmitting a positioning reference signal in any of the following ways:

[0059] The resource pool indication field indicates the target resource pool in a bitmap manner, each bit of the bitmap is associated with an index of a resource pool, and the value of each bit of the bitmap is used to indicate whether each resource pool is the target resource pool;

[0060] For example, the bitmap is shown in Table 1: 0 to N-1 represent the indexes of N resource pools. When the value of a bit is 0, it indicates that the resource pool corresponding to the bit is not the target resource pool. When the value of the bit is 1, the resource pool corresponding to the bit is the target resource pool. Further, the user equipment UE transmits the positioning reference signal in the resource pool corresponding to the bit with a value of 1 according to the resource pool time domain sequence according to the resource pool indication field. In addition, when frequency hopping transmission is performed, the UE frequency hops and transmits the positioning reference signal in the resource pool corresponding to the bit with a value of 1 according to the resource pool time domain sequence.

[0061] Table 1 Bitmap

[0062]

[0063] The resource pool indication field directly indicates the index of the target resource pool for transmitting the positioning reference signal. In other words, the index of the target resource pool for transmitting the positioning reference signal may be directly indicated instead of using a bitmap.

[0064] In a more specific embodiment, the resource pool indication field directly indicates the index of the target resource pool used to transmit the positioning reference signal, including one of the following:

[0065] When the total number N of resource pools is not a positive integer power of 2, the number of bits in the resource pool indication field is a preset value S, and the first (k-1) bits of the resource pool indication field are bits are used to indicate the index of the target resource pool, where k is an integer greater than 1. bits are a group used to indicate an index of the target resource pool, and the kth group The value of the bit meets the preset end condition; for example, when the total number of resource pools is 7, this method can be used, which presets a preset value S and limits the number of bits indicating the resource pool where the positioning reference signal is located to no more than S. Applicable to this method, when the SCI is a second-type SCI, M does not include the current resource pool, and at least part of the SL PRS associated with the second-type SCI is located in the same time slot as the second-type SCI.

[0066] Further, the values ​​of the bits in the resource pool indication field that are not used to indicate the index of the resource pool for transmitting the positioning reference signal are all set to the second value. For example, the values ​​of the bits that are not used to indicate the index of the resource pool for transmitting the positioning reference signal are all set to 1.

[0067] In some embodiments, when the user equipment UE reads the resource pool indication field, each bits are identified as a resource pool index. Therefore, if the terminal detects the kth (k is a positive integer) length When the value of the bit field is all 1, it is determined that the resource pool index indication ends and the remaining bits are no longer read. For example, let M = 4 (so the following numbers are 0 to 2), N = 6, and the number of allocated bits S = 20. At this time, the number of bits actually used to indicate the resource pool where the positioning reference signal is located is When the terminal reads this indication field, each bits are identified as a resource pool index, as shown in Table 2, the positioning reference signal is transmitted on the resource pools with resource pool indexes of 001, 011, 000 and 100, that is, the resource pool indexes are 1, 3, 0 and 4 (arranged in time domain order). The user equipment UE detects the fifth length of If the values ​​of the bit field (bit numbers 12 to 14) are all 1, it is considered that the resource pool index indication ends and the remaining bits are no longer read.

[0068] Table 2 Resource pool index distribution 1

[0069]

[0070] Set the number of bits in the resource pool indication field to The total number of resource pools is N, and the corresponding resource pool indexes are 0 to N-1. When the above-mentioned frequency hopping method is used for transmission, the above-mentioned M represents the total number of hops for the transmission of the above-mentioned positioning reference signal, M≤N. That is, another case is to directly set the number of bits of the resource pool indication field, and no longer pre-set the preset value S. Applicable to this method, when the above-mentioned SCI is the second-class SCI, M does not include the current resource pool, and at least part of the SL PRS associated with the above-mentioned second-class SCI is located in the same time slot as the above-mentioned second-class SCI. Applicable to this method, the numerical indication field carried in the above-mentioned SCI is used to indicate the value of M. Of course, the numerical indication field can also be carried in parameters other than SCI.

[0071] In addition, the SL PRS associated with the first type of SCI is not located in the same slot (time slot) as the first type of SCI.

[0072] In some embodiments, when the user equipment UE reads the indication field, each bits identify a resource pool index. An example is as follows:

[0073] Let M = 4, N = 8, the total number of bits required is When the terminal reads this indication field, each The bits are identified as a resource pool index. As shown in Table 3, the positioning reference signal is transmitted on the resource pools with resource pool indexes of 101, 010, 001 and 000, that is, the resource pool indexes are 5, 2, 1 and 0 (arranged in time domain order).

[0074] Table 3 Resource pool index distribution 2

[0075]

[0076] The number of bits in the resource pool indication field is Where M represents the total number of target resource pools, N represents the total number of resource pools, and each bits are a group for indicating an index of the target resource pool. The corresponding resource pool index is 0~N-1. When the above-mentioned frequency hopping method is used for transmission, the above-mentioned M represents the total number of hops for the transmission of the above-mentioned positioning reference signal, M≤N. That is, another case is to directly set the number of bits of the resource pool indication field, and no longer pre-set the preset value S. Applicable to this method, when the above-mentioned SCI is the second-class SCI, M does not include the current resource pool, and at least part of the SL PRS associated with the above-mentioned second-class SCI is located in the same time slot as the above-mentioned second-class SCI. Applicable to this method, the numerical indication field carried in the above-mentioned SCI is used to indicate the value of M. Of course, the numerical indication field can also be carried in parameters other than SCI.

[0077] In some embodiments, side link control information SCI is used to indicate positioning reference signal resources, including:

[0078] The first offset indication field in the time domain resource indication field is used to indicate the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool, in units of time slots; or to indicate the time slot offset between the time domain starting point of each of the positioning reference signal resources and the SCI, in units of time slots;

[0079] The second offset indication field in the time domain resource indication field is used to indicate the symbol offset between the first symbol of the positioning reference signal in each of the target resource pools and the time domain starting point of the time slot where the positioning reference signal is located, in units of symbol symbol; optionally, the second offset indication field is applicable to all target resource pools;

[0080] The slot number indication field in the time domain resource indication field is used to indicate the number of time slots occupied by the positioning reference signal in each of the target resource pools; further, the slot number indication field is applicable to all target resource pools;

[0081] The symbol number indication field in the time domain resource indication field is used to indicate the number of symbols occupied by the positioning reference signal in each target resource pool in the time slot. Further, the symbol number indication field is applicable to all resource pools.

[0082] Further,

[0083] Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool, including:

[0084] The first offset indicates the domain occupied bits, wherein M represents the total number of the target resource pools, and P represents the maximum value of the time domain length of the target resource pool, wherein the unit of the time domain length is time slot; when the above-mentioned frequency hopping method is used for transmission, the above-mentioned M represents the total number of hops for the transmission of the above-mentioned positioning reference signal. In addition, when the above-mentioned SCI is the second-class SCI, M does not include the current resource pool (that is, the resource pool for receiving the SCI, that is, the first resource pool in the time domain, and M at this time is equivalent to M-1 under the first-class SCI), and at least part of the SL PRS associated with the above-mentioned second-class SCI is located in the same time slot as the above-mentioned second-class SCI.

[0085] and / or,

[0086] Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of each positioning reference signal resource and the SCI, including:

[0087] The first offset indicates the domain occupied bits, where M represents the total number of the target resource pools, and the distance between the positioning reference signal resource indicated by the SCI and the SCI does not exceed Q time slots. In the case of transmission using the above-mentioned frequency hopping method, the above-mentioned M represents the total number of hops for the transmission of the above-mentioned positioning reference signal, and this method is applicable to all transmission types (unicast, multicast and broadcast). In addition, in the case where the above-mentioned SCI is a second-class SCI, M does not include the current resource pool (i.e., the resource pool receiving the SCI, that is, the first resource pool in the time domain, and M at this time is equivalent to M-1 under the first-class SCI), and at least part of the SL PRS associated with the above-mentioned second-class SCI is located in the same time slot as the above-mentioned second-class SCI.

[0088] In some implementations, using side link control information SCI to indicate positioning reference signal resources includes:

[0089] The third offset indication field in the frequency domain resource indication field is used to indicate the sub-channel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool, in units of sub-channel;

[0090] The fourth offset indication field in the frequency domain resource indication field is used to indicate the resource block offset between the first resource block of the positioning reference signal resource in each target resource pool and the frequency domain starting point of the subchannel where the first resource block is located; the unit is RB, and optionally, the fourth offset indication field is applicable to all target resource pools.

[0091] The frequency domain bandwidth indication field in the frequency domain resource indication field is used to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools.

[0092] In some other implementations, the third offset indication field in the frequency domain resource indication field is used to indicate the subchannel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool, including:

[0093] In the case where the values ​​of the third offset indication field corresponding to different resource pools are different, the third offset indication field occupies bits, where M represents the total number of the target resource pools, and W represents the maximum value of the frequency domain length of the target resource pool, where the unit of the frequency domain length is subchannel. In the case where the above-mentioned frequency hopping method is adopted for transmission, the above-mentioned M represents the total number of hops for the transmission of the above-mentioned positioning reference signal. Furthermore, in the case where the above-mentioned SCI is a second-type SCI, M does not include the current resource pool (that is, the resource pool for receiving the SCI, that is, the first resource pool in the time domain, and M at this time is equivalent to M-1 under the first-type SCI), and at least part of the SL PRS associated with the above-mentioned second-type SCI is located in the same time slot as the above-mentioned second-type SCI.

[0094] In other embodiments, when the SCI is a second-type SCI, the side link control information SCI is used to indicate the positioning reference signal resource, including: the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool is determined according to the time slot offset between the time domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the time domain starting point of the target resource pool where the positioning reference signal resource is located, that is, in this manner, the first offset indication domain is no longer used for indication, and an implicit indication method is used; and / or, the sub-channel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool is determined according to the sub-channel offset between the frequency domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the frequency domain starting point of the target resource pool where the positioning reference signal resource is located, that is, in this manner, the third offset indication domain is no longer used for indication, and an implicit indication method is used.

[0095] This indication method in which the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool is determined according to the time slot offset between the time domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the time domain starting point of the target resource pool where the positioning reference signal resource is located can be applied to the case where the values ​​of the first offset indication fields corresponding to different target resource pools are the same, that is, there is a first offset indication field, but the first offset indication field is not used for indication;

[0096] The sub-channel offset between the frequency domain starting point of the positioning reference signal resource in each target resource pool and the frequency domain starting point of the target resource pool is determined according to the sub-channel offset between the frequency domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the frequency domain starting point of the target resource pool where the positioning reference signal resource is located. This indication method can be applied to the situation where the value of the third offset indication field corresponding to different target resource pools is the same, that is, there is a third offset indication field, but the third offset indication field is not used for indication.

[0097] In some further implementation manners, the frequency domain bandwidth indication field in the frequency domain resource indication field is used to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools, including:

[0098] Frequency domain bandwidth indication domain occupancy bits, wherein M represents the total number of the target resource pools, Z represents the upper limit of the frequency domain length of the target resource pool, and the unit of the frequency domain length is a sub-channel or a resource block; wherein M represents the total number of resource pools used to transmit the positioning reference signal, and in the case of transmission using the frequency hopping method, the M represents the total number of hops for the positioning reference signal transmission, and Z represents the upper limit of the frequency domain length of the resource pool (in units of sub-channel or RB);

[0099] or,

[0100] In the case that the bandwidths occupied by the positioning reference signal resources in different target resource pools are the same, the values ​​of a preset number of bits in the frequency domain resource indication field are used to indicate the bandwidth occupied by the positioning reference signal resources in each target resource pool, wherein there is a corresponding relationship between the values ​​of the preset number of bits and the bandwidth occupied by the positioning reference signal.

[0101] As shown in Table 4, 01 indicates that the bandwidth is 25 RB. When the value corresponding to 2 bits is 00, the bandwidth of the positioning reference signal starts from the frequency domain start point of the positioning reference signal and is mapped to the end of the resource pool (ie, transmitted with the maximum bandwidth).

[0102] Table 4 Bandwidth distribution Table 1

[0103]

[0104] As shown in Table 5, 01 indicates that the bandwidth is 5 sub-channels. When the value corresponding to 2 bits is 00, the bandwidth of the positioning reference signal starts from the starting point of the positioning reference signal in the frequency domain and is mapped to the end of the resource pool (ie, transmitted with the maximum bandwidth).

[0105] Table 5 Bandwidth distribution Table 2

[0106]

[0107]

[0108] Furthermore, the above method also includes: using the numerical indication field carried in the above SCI to indicate the value of M.

[0109] More specifically, the target resource pool is a dedicated resource pool for positioning, or the target resource pool includes both a dedicated resource pool for positioning and a dedicated resource pool for non-positioning, wherein the dedicated resource pool for non-positioning can be understood as a legacy resource pool, i.e., multiple types of resource pools already available in the prior art. In addition, in the case where the resource pool includes both a dedicated resource pool for positioning and a dedicated resource pool for non-positioning, the dedicated resource pool for positioning and the dedicated resource pool for non-positioning should be numbered uniformly. ; and / or, the SCI also carries a positioning request information indication field, the positioning request information indication field is used to indicate that the user equipment UE sending the SCI requests to initiate a positioning process, or is used to indicate that the UE sending the SCI requests to terminate the positioning process, for example, occupies 1 bit, when the bit value is 1, it indicates that the UE sending the SCI requests to initiate a positioning process for positioning; when the bit value is 0, it indicates that the UE sending the SCI requests to terminate the positioning process to stop positioning. And / or, the SCI is a two-level structure, the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field are carried in the first-level SCI, the SCI is multiplexed on the basis of SCI format 1-A, and a multiplexing indication bit is added to the SCI, and the multiplexing indication bit is used to indicate whether the resources indicated by the current SCI are used for the transmission of the positioning reference signal. For example, when the value of the multiplexing indication bit is 0, it indicates that the resources indicated by the current SCI are not used for the transmission of the positioning reference signal; when the value of the multiplexing indication bit is 1, it indicates that the resources indicated by the current SCI are used for the transmission of the positioning reference signal.

[0110] The embodiment of the present application also provides a positioning reference signal resource indication device. It should be noted that the positioning reference signal resource indication device of the embodiment of the present application can be used to execute the positioning reference signal resource indication method provided in the embodiment of the present application. The following introduces the positioning reference signal resource indication device provided in the embodiment of the present application.

[0111] Figure 2 is a schematic diagram of a positioning reference signal resource indication device according to an embodiment of the present application. Figure 2 As shown, the device comprises:

[0112] The first indication unit 20 uses side link control information SCI to indicate positioning reference signal resources, where the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field;

[0113] Among them, the resource pool indication field is used to indicate the target resource pool for transmitting the positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools.

[0114] The positioning reference signal resource indication device of the present application, the first indication unit realizes indicating the positioning reference signal resource by using at least one of the frequency hopping indication field, the resource pool indication field, the transmission strategy indication field, the time domain resource indication field and the frequency domain resource indication field, thereby solving the problem that the SCI in the prior art cannot indicate the sidelink positioning reference signal resource.

[0115] Furthermore, the SCI also carries a frequency hopping indication field, and the first indication unit is also used for the frequency hopping indication field to indicate whether the user equipment UE sending the SCI adopts a frequency hopping manner to transmit a positioning reference signal.

[0116] Furthermore, the SCI also carries a transmission strategy indication field. The first indication unit is also used in the transmission strategy indication field to indicate that the transmission mode of the positioning reference signal on the target resource pool is one of the following: new transmission, retransmission, and repetition when the frequency hopping indication field indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal.

[0117] Further, the first indication unit includes any one of the following:

[0118] A first indication module, used for the resource pool indication field to indicate the target resource pool in a bitmap manner, wherein each bit of the bitmap is associated with an index of a resource pool, and a value of each bit of the bitmap is used to indicate whether each resource pool is the target resource pool;

[0119] The second indication module is used for the resource pool indication field to directly indicate the index of the target resource pool used to transmit the positioning reference signal.

[0120] Further, the second indication module includes one of the following:

[0121] The first indication submodule is used for, when the total number N of resource pools is not a positive integer power of 2, the number of bits of the resource pool indication field is a preset value S, and the first (k-1) of the resource pool indication field bits are used to indicate the index of the target resource pool, where k is an integer greater than 1. bits are a group used to indicate an index of the target resource pool, and the kth group The value of the bit meets the preset end condition;

[0122] The second indication submodule is used for the number of bits of the resource pool indication field. Where M represents the total number of target resource pools, N represents the total number of resource pools, and each A group of bits is used to indicate an index of the target resource pool.

[0123] Furthermore, the first indication unit further includes:

[0124] A third indication module, configured to use the first offset indication field in the time domain resource indication field to indicate a time slot offset between a time domain starting point of the positioning reference signal resource in each of the target resource pools and a time domain starting point of the target resource pool, or to indicate a time slot offset between a time domain starting point of each of the positioning reference signal resources and the SCI;

[0125] a fourth indication module, configured to use the second offset indication field in the time domain resource indication field to indicate a symbol offset between a first symbol of the positioning reference signal in each of the target resource pools and a time domain starting point of a time slot where the positioning reference signal is located;

[0126] A fifth indication module, configured to use the slot number indication field in the time domain resource indication field to indicate the number of time slots occupied by the positioning reference signal in each of the target resource pools;

[0127] The sixth indication module is used to use the symbol number indication field in the time domain resource indication field to indicate the number of symbols occupied by the positioning reference signal in each of the target resource pools in the time slot.

[0128] Furthermore, the third indication module is also used for the first offset indication domain to occupy bits, wherein M represents the total number of the target resource pool, and P represents the maximum value of the time domain length of the target resource pool, wherein the unit of the time domain length is a time slot; the third indication module is also used for the first offset indication domain to occupy bits, where M represents the total number of the target resource pool, and the distance between the positioning reference signal resource indicated by the SCI and the SCI does not exceed Q time slots.

[0129] Furthermore, the first indication unit further includes:

[0130] a seventh indication module, configured to use the third offset indication field in the frequency domain resource indication field to indicate a subchannel offset between a frequency domain starting point of the positioning reference signal resource in each of the target resource pools and a frequency domain starting point of the target resource pool;

[0131] an eighth indication module, configured to use the fourth offset indication field in the frequency domain resource indication field to indicate a resource block offset between a first resource block of the positioning reference signal resource in each of the target resource pools and a frequency domain starting point of a subchannel where the first resource block is located;

[0132] The ninth indication module is configured to use the frequency domain bandwidth indication field in the frequency domain resource indication field to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools.

[0133] Furthermore, the seventh indication module is further used for: the third offset indication domain occupies bits, where M represents the total number of the target resource pools, and W represents the maximum value of the frequency domain length of the target resource pool, where the unit of the frequency domain length is subchannel.

[0134] Further, the first indication unit is further configured to, when the SCI is a second type SCI, determine the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool according to the time slot offset between the time domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the time domain starting point of the target resource pool where the positioning reference signal resource is located;

[0135] Further, the first indication unit is further configured to, when the SCI is a second type SCI, determine the subchannel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool according to the subchannel offset between the frequency domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the frequency domain starting point of the target resource pool where the positioning reference signal resource is located;

[0136] Furthermore, the ninth indication module is also used for indicating the occupation of the frequency domain bandwidth. bits, wherein M represents the total number of the target resource pools, Z represents the upper limit of the frequency domain length of the target resource pool, and the unit of the frequency domain length is a subchannel or a resource block; or, when the bandwidth occupied by the positioning reference signal resources in different target resource pools is the same, the value of a preset number of bits in the frequency domain resource indication field is used to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools, wherein there is a corresponding relationship between the value of the preset number of bits and the bandwidth occupied by the positioning reference signal.

[0137] Further, when the SCI is a second-type SCI, M does not include a current target resource pool, and at least part of the SL PRS associated with the second-type SCI is located in the same time slot as the second-type SCI.

[0138] Furthermore, the device also includes a second indication unit, which is used to indicate the value of M using a numerical indication field carried in the SCI.

[0139] Further, the target resource pool is a positioning-dedicated resource pool, or the target resource pool includes both a positioning-dedicated resource pool and a non-positioning-dedicated resource pool; and / or the SCI also carries a positioning request information indication field, and the positioning request information indication field is used to indicate that the user equipment UE sending the SCI requests to initiate a positioning process, or is used to indicate that the UE sending the SCI requests to terminate the positioning process; and / or the SCI is a two-level structure, and the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field are carried in the first-level SCI, and the SCI is multiplexed on the basis of SCIformat 1-A, and a multiplexing indication bit is added to the SCI, and the multiplexing indication bit is used to indicate whether the resources indicated by the current SCI are used for the transmission of the positioning reference signal.

[0140] The positioning reference signal resource indication device includes a processor and a memory. The first indication unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.

[0141] The processor includes a kernel, which calls the corresponding program unit from the memory. One or more kernels can be set, and the indication of the positioning reference signal resource is realized by adjusting the kernel parameters.

[0142] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0143] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the positioning reference signal resource indication method.

[0144] An embodiment of the present invention provides a processor, which is used to run a program, wherein the method for indicating positioning reference signal resources is executed when the program is run.

[0145] An embodiment of the present invention provides a device, the device including a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented:

[0146] Step S101, using side link control information SCI to indicate positioning reference signal resources, the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field;

[0147] The resource pool indication field is used to indicate the target resource pool for transmitting the positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools. The device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0148] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing at least the following method steps:

[0149] Step S101, using side link control information SCI to indicate positioning reference signal resources, the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field;

[0150] Among them, the resource pool indication field is used to indicate the target resource pool for transmitting the positioning reference signal, the time domain resource indication field is used to indicate the time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate the frequency domain information of the positioning reference signal resources in each of the target resource pools.

[0151] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0152] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0153] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0154] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0155] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0156] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0157] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0158] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0159] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0160] 1) The method for indicating positioning reference signal resources of the present application uses the side link control information SCI carrying the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field to realize the indication of positioning reference signal resources, thereby solving the problem that the SCI in the prior art cannot realize the indication of sidelink positioning reference signal resources.

[0161] 2) In the device for indicating positioning reference signal resources of the present application, the first indication unit uses the side link control information SCI that carries the resource pool indication field, the time domain resource indication field and the frequency domain resource indication field to realize the indication of positioning reference signal resources, thereby solving the problem that the SCI in the prior art cannot realize the indication of sidelink positioning reference signal resources.

[0162] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for indicating positioning reference signal resources, characterized in that: include: The side link control information SCI is used to indicate the positioning reference signal resource, and the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field; The resource pool indication field is used to indicate a target resource pool for transmitting a positioning reference signal, the time domain resource indication field is used to indicate time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate frequency domain information of the positioning reference signal resources in each of the target resource pools; The SCI also carries a frequency hopping indication field, and the side link control information SCI is used to indicate the positioning reference signal resource, including: the frequency hopping indication field is used to indicate whether the user equipment UE sending the SCI adopts a frequency hopping method to transmit the positioning reference signal; The SCI also carries a transmission strategy indication field, which uses side link control information SCI to indicate positioning reference signal resources, including: the transmission strategy indication field is used to indicate that the transmission mode of the positioning reference signal on the target resource pool is one of the following: new transmission, retransmission, and repetition when the frequency hopping indication field indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal.

2. The method according to claim 1, characterized in that The resource pool indication field indicates the target resource pool for transmitting the positioning reference signal in any of the following ways: The resource pool indication field indicates the target resource pool in a bitmap manner, each bit of the bitmap is associated with an index of a resource pool, and the value of each bit of the bitmap is used to indicate whether each resource pool is the target resource pool; The resource pool indication field directly indicates the index of the target resource pool used to transmit the positioning reference signal.

3. The method according to claim 2, characterized in that The resource pool indication field directly indicates the index of the target resource pool used to transmit the positioning reference signal, including one of the following: When the total number N of resource pools is not a positive integer power of 2, the number of bits in the resource pool indication field is a preset value S, and the first (k-1) bits of the resource pool indication field are bits are used to indicate the index of the target resource pool, where k is an integer greater than 1. bits are a group used to indicate an index of the target resource pool, and the kth group The value of the bit meets the preset end condition; The number of bits in the resource pool indication field is Where M represents the total number of target resource pools, N represents the total number of resource pools, and each A group of bits is used to indicate an index of the target resource pool.

4. The method according to claim 1, characterized in that: The side link control information SCI is used to indicate the positioning reference signal resource, including: Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool, or indicating the time slot offset between the time domain starting point of each of the positioning reference signal resources and the SCI; Using the second offset indication field in the time domain resource indication field to indicate the symbol offset between the first symbol of the positioning reference signal in each of the target resource pools and the time domain starting point of the time slot where the positioning reference signal is located; Using the slot number indication field in the time domain resource indication field to indicate the number of time slots occupied by the positioning reference signal in each of the target resource pools; The symbol number indication field in the time domain resource indication field is used to indicate the number of symbols occupied by the positioning reference signal in each of the target resource pools in the time slot.

5. The method according to claim 4, characterized in that Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool, including: The first offset indicates the domain occupied bits, wherein M represents the total number of the target resource pools, P represents the maximum value of the time domain length of the target resource pool, wherein the unit of the time domain length is time slot; and / or, Using the first offset indication field in the time domain resource indication field to indicate the time slot offset between the time domain starting point of each positioning reference signal resource and the SCI, including: The first offset indicates the domain occupied bits, where M represents the total number of the target resource pool, and the distance between the positioning reference signal resource indicated by the SCI and the SCI does not exceed Q time slots.

6. The method according to claim 1, characterized in that The side link control information SCI is used to indicate the positioning reference signal resource, including: Using the third offset indication field in the frequency domain resource indication field to indicate the subchannel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool; Using the fourth offset indication field in the frequency domain resource indication field to indicate the resource block offset between the first resource block of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the subchannel where the first resource block is located; The frequency domain bandwidth indication field in the frequency domain resource indication field is used to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools.

7. The method according to claim 6, characterized in that Using the third offset indication field in the frequency domain resource indication field to indicate the subchannel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool, including: The third offset indication domain occupies bits, where M represents the total number of the target resource pools, and W represents the maximum value of the frequency domain length of the target resource pool, where the unit of the frequency domain length is subchannel.

8. The method according to claim 1, characterized in that In the case where the SCI is the second type SCI, the side link control information SCI is used to indicate the positioning reference signal resource, including: The time slot offset between the time domain starting point of the positioning reference signal resource in each of the target resource pools and the time domain starting point of the target resource pool is determined according to the time slot offset between the time domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the time domain starting point of the target resource pool where the positioning reference signal resource is located; and / or, The sub-channel offset between the frequency domain starting point of the positioning reference signal resource in each of the target resource pools and the frequency domain starting point of the target resource pool is determined according to the sub-channel offset between the frequency domain starting point of the positioning reference signal resource located in the same time slot as the SCI and the frequency domain starting point of the target resource pool where the positioning reference signal resource is located.

9. The method according to claim 6, characterized in that Using the frequency domain bandwidth indication field in the frequency domain resource indication field to indicate the bandwidth occupied by the positioning reference signal resources in each of the target resource pools includes: Frequency domain bandwidth indication domain occupancy bits, where M represents the total number of the target resource pools, Z represents the upper limit of the frequency domain length of the target resource pool, and the unit of the frequency domain length is a subchannel or a resource block; or In the case that the bandwidths occupied by the positioning reference signal resources in different target resource pools are the same, the values ​​of a preset number of bits in the frequency domain resource indication field are used to indicate the bandwidth occupied by the positioning reference signal resources in each target resource pool, wherein there is a corresponding relationship between the values ​​of the preset number of bits and the bandwidth occupied by the positioning reference signal.

10. The method according to any one of claims 3, 5 and 7, characterized in that: When the SCI is a second type SCI, M does not include the current target resource pool, and at least part of the SL PRS associated with the second type SCI is located in the same time slot as the second type SCI; and / or, The method further comprises: The value indication field carried in the SCI is used to indicate the value of M.

11. The method according to any one of claims 1 to 8, characterized in that The target resource pool is a positioning-specific resource pool, or the target resource pool includes both a positioning-specific resource pool and a non-positioning-specific resource pool; and / or, The SCI also carries a positioning request information indication field, where the positioning request information indication field is used to indicate that the user equipment UE sending the SCI requests to initiate a positioning process, or to indicate that the UE sending the SCI requests to terminate the positioning process; and / or, The SCI has a two-level structure. The resource pool indication field, the time domain resource indication field, and the frequency domain resource indication field are carried in the first-level SCI. The SCI is multiplexed on the basis of SCI format 1-A. A multiplexing indication bit is added to the SCI. The multiplexing indication bit is used to indicate whether the resources indicated by the current SCI are used for the transmission of the positioning reference signal.

12. A positioning reference signal resource indication device, characterized in that: include: A first indication unit, using side link control information SCI to indicate positioning reference signal resources, wherein the SCI carries: a resource pool indication field, a time domain resource indication field, and a frequency domain resource indication field; The resource pool indication field is used to indicate a target resource pool for transmitting a positioning reference signal, the time domain resource indication field is used to indicate time domain information of the positioning reference signal resources in each of the target resource pools, and the frequency domain resource indication field is used to indicate frequency domain information of the positioning reference signal resources in each of the target resource pools; The SCI also carries a frequency hopping indication field, and the first indication unit is also used for the frequency hopping indication field to indicate whether the user equipment UE sending the SCI adopts a frequency hopping method to transmit the positioning reference signal; The SCI also carries a transmission strategy indication field. The first indication unit is also used in the transmission strategy indication field to indicate that the transmission mode of the positioning reference signal on the target resource pool is one of the following: new transmission, retransmission, and repetition when the frequency hopping indication field indicates that the UE sending the SCI does not use the frequency hopping method to transmit the positioning reference signal.

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