A PRS ID configuration method, apparatus, and device

Abstract

The application discloses a PRS ID configuration method, device and equipment, relates to the technical field of communication, and the method is applied to a configuration management device. The method comprises the following steps: determining the first number of positioning reference signal identifiers (PRS IDs) that can be distributed according to a predefined frame structure and a frequency domain multiplexing factor; determining the first geographical multiplexing range of the PRS IDs according to a PRS detection distance; and configuring RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical multiplexing range according to the first number, the first geographical multiplexing range and RSU deployment information. The above scheme of the application can ensure that the RSU PRS IDs configured for each RSU in the first geographical multiplexing range are unique and orthogonal, and can reduce the probability of resource collision of a sending end and the complexity of reception of a receiving end.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a PRS ID configuration method, device and equipment. BACKGROUND

[0002] The self-synchronization mechanism needs to be considered in an indoor scene or a tunnel scene. However, the synchronization precision of the existing Long Term Evolution Vehicle (LTE-V) standard for vehicle networking is relatively low. Since positioning needs to be based on synchronization precision, the positioning precision that can be achieved will also be relatively low due to the low synchronization precision of the LTE-V standard. To achieve high-precision synchronization and positioning, a carrier positioning mechanism can be introduced.

[0003] Since the LTE-V does not support sending carrier phase-related information at present, the inventors of the present application consider sending PRS positioning assistance information and associating the user's identification (ID) and the corresponding resource signal, so as to ultimately achieve a relatively more accurate synchronization positioning through the detection of the signal or the specific timing and phase deviation, and the specific ID information. However, in the above scheme, the allocation of the user's identification (ID) is an essential algorithm component, and how to ensure the orthogonal ID allocation with low receiving complexity is a problem to be solved at present. SUMMARY

[0004] The purpose of the present application is to provide a PRS ID configuration method, device and equipment, which provides a low-receiving-complexity ID configuration method for ensuring resource orthogonality for the process of implementing high-precision synchronization and positioning by sending PRS positioning assistance information using the LTE-V frame structure.

[0005] In a first aspect, to achieve the above purpose, the embodiments of the present application provide a PRS ID configuration method applied to a configuration management device, comprising:

[0006] determining a first number of PRS IDs that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor;

[0007] determining a first geographical multiplexing range of PRS IDs according to a PRS detection distance;

[0008] configuring RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical multiplexing range according to the first number, the first geographical multiplexing range, and RSU deployment information.

[0009] Optionally, the RSU PRS ID and the RSU PRS ID set are configured for the RSU in the first geographical multiplexing range according to the first number, the first geographical multiplexing range, and the RSU deployment information, including:

[0010] The RSU PRS ID set is configured according to the first number, the first geographical multiplexing range, and the RSU deployment information.

[0011] Each RSU in the first geographical multiplexing range is configured with an RSU PRS ID according to the RSU PRS ID set.

[0012] Optionally, the RSU PRS ID set is configured according to the first number, the first geographical multiplexing range, and the RSU deployment information, including:

[0013] The number of RSUs in the first geographical multiplexing range is determined according to the RSU deployment information.

[0014] The number of RSU PRS IDs is determined according to the first number and the number of RSUs; wherein the number of RSU PRS IDs is greater than or equal to the number of RSUs and less than or equal to the first number.

[0015] The RSU PRS ID set is determined according to the number of RSU PRS IDs.

[0016] Optionally, each RSU in the first geographical multiplexing range is configured with an RSU PRS ID according to the RSU PRS ID set, including:

[0017] The RSU PRS ID is configured for each RSU in the order of the geographical position of the RSU; wherein the RSU PRS ID configured for each RSU is an element in the RSU PRS ID set.

[0018] In a second aspect, to achieve the above object, the embodiments of the present application provide a PRS ID configuration method, applied to a first RSU, including:

[0019] The RSU PRS ID and the RSU PRS ID set configured by a configuration management device are acquired.

[0020] In the case that the first RSU only needs to receive PRS sent by other RSUs, blind detection is performed on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS ID and subcarrier group and PRS sequence.

[0021] Optionally, the blind detection is performed on the subcarriers corresponding to each element in the RSU PRS ID set, including:

[0022] In the case where the configuration management device assigns RSU PRS IDs to each RSU in the order of the geographical positions of the RSUs, a second target RSU PRS ID is determined according to the RSU PRS ID configured for the first RSU and the first number value; wherein the second target RSU PRS ID includes: the first number value of RSU PRS IDs before the RSU PRS ID configured for the first RSU, and the first number value of RSU PRS IDs after the RSU PRS ID configured for the first RSU;

[0023] According to the correspondence between the PRS ID configured for the first RSU and the subcarrier group and the PRS sequence, blind detection is performed on the subcarrier group corresponding to the second target RSU PRS ID.

[0024] Optionally, the method further includes:

[0025] An OBU PRS ID set is obtained; wherein the OBU PRS ID set is determined according to the RSU PRS ID set, or is configured by the configuration management device;

[0026] In the case where the first RSU needs to receive PRS sent by an OBU, blind detection is performed on the subcarriers corresponding to each element in the OBU PRS ID set according to the predefined correspondence between the PRS ID and the subcarrier group and the PRS sequence.

[0027] Optionally, the method further includes:

[0028] According to the blind detection result of the subcarriers corresponding to each element in the OBU PRS ID set, the OBU PRS ID set is dynamically maintained;

[0029] According to the maintenance result of the OBU PRS ID set, an idle OBU PRS ID set is periodically broadcasted, wherein the idle OBU PRS ID set is a set of OBU PRS IDs in the OBU PRS ID set that are not occupied by any OBU.

[0030] Optionally, according to the blind detection result of the subcarriers corresponding to each element in the OBU PRS ID set, the OBU PRS ID set is dynamically maintained, including:

[0031] In a case where it is determined according to the blind detection result that at least one OBU PRS ID is occupied by an OBU, setting a state of the at least one OBU PRS ID as a non-idle state in a first time length, and resetting the at least one OBU PRS ID as an idle state after the first time length.

[0032] In a third aspect, to achieve the above object, an embodiment of the present application provides a PRS ID configuration method, applied to a first OBU, comprising:

[0033] receiving a set of idle OBU PRS IDs periodically broadcast by a first RSU;

[0034] selecting a target OBU PRS ID from the set of OBU PRS IDs, wherein the target OBU PRS ID is an OBU PRS ID currently needed to be occupied by the first OBU.

[0035] Optionally, the method further comprises:

[0036] randomly generating a PRS sending pattern;

[0037] obtaining a target subcarrier group and a target PRS sequence corresponding to the target OBU PRS ID according to the target OBU PRS ID and a pre-defined correspondence between PRS IDs and subcarrier groups and PRS sequences;

[0038] sending PRS based on the target PRS sequence on the target subcarrier group according to the PRS sending pattern in a second time length corresponding to an access process.

[0039] Optionally, the method further comprises:

[0040] receiving PRS in a time slot in which PRS is abandoned according to the PRS sending pattern;

[0041] reselecting a target OBU PRS ID from the set of idle OBU PRS IDs in a case where a PRS ID corresponding to the received PRS is the same as the target OBU PRS ID.

[0042] Optionally, the method further comprises:

[0043] receiving a set of RSU PRS IDs sent by an RSU;

[0044] performing blind detection on subcarriers corresponding to each element in the set of RSU PRS IDs according to a pre-defined correspondence between PRS IDs and subcarrier groups and PRS sequences.

[0045] Optionally, according to the correspondence between the predefined PRS ID and the subcarrier group and the PRS sequence, blind detection is performed on the subcarriers corresponding to each element in the RSU PRS ID set, including:

[0046] In the case where the configuration management device is configured to sequentially assign RSU PRS IDs to each RSU in the order of the geographical positions of the RSUs, according to the correspondence between the PRS ID and the subcarrier group and the PRS sequence, the RSU PRS ID corresponding to the PRS with the strongest signal in the received PRS is determined;

[0047] According to the RSU PRS ID corresponding to the PRS with the strongest signal and the RSU PRS ID set, a second number of third target RSU PRS IDs are determined; wherein the RSUs corresponding to the second number of third target RSU PRS IDs are adjacent to the RSU that sends the PRS with the strongest signal in geographical position;

[0048] Blind detection is performed on the subcarriers corresponding to the RSU PRS ID corresponding to the PRS with the strongest signal and the third target RSU PRS ID.

[0049] In a fourth aspect, to achieve the above object, an embodiment of the present application provides a PRS ID configuration device, applied to a configuration management device, comprising:

[0050] A first determination module is configured to determine a first number of positioning reference signal identifiers (PRS IDs) that can be assigned according to a predefined frame structure and a frequency domain multiplexing factor;

[0051] A second determination module is configured to determine a first geographical position multiplexing range of PRS IDs according to a PRS detection distance;

[0052] A configuration module is configured to configure RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical position multiplexing range according to the first number, the first geographical position multiplexing range, and roadside device (RSU) deployment information.

[0053] In a fifth aspect, to achieve the above object, an embodiment of the present application provides a PRS ID configuration device, applied to a first RSU, comprising:

[0054] An acquisition module is configured to acquire RSU PRS IDs and RSU PRS ID sets configured by a configuration management device;

[0055] The first detection module is configured to perform blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs and subcarrier groups and PRS sequences, in a case where the first RSU only needs to receive PRS sent by other RSUs.

[0056] In a sixth aspect, to achieve the above object, the embodiments of the present application provide a PRS ID configuration device, applied to a first OBU, comprising:

[0057] The first receiving module is configured to receive a set of idle OBU PRS IDs periodically broadcast by a first RSU.

[0058] The first selecting module is configured to select a target OBU PRS ID from the set of OBU PRS IDs, wherein the target OBU PRS ID is an OBU PRS ID currently needed to be occupied by the first OBU.

[0059] In a seventh aspect, to achieve the above object, the embodiments of the present application provide a configuration management device, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the PRS ID configuration method of the first aspect when executing the computer program.

[0060] In an eighth aspect, to achieve the above object, the embodiments of the present application provide an RSU, which is a first RSU, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the PRS ID configuration method of the second aspect when executing the computer program.

[0061] In a ninth aspect, to achieve the above object, the embodiments of the present application provide an OBU, which is a first OBU, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the PRS ID configuration method of the third aspect when executing the computer program.

[0062] In a tenth aspect, to achieve the above object, the embodiments of the present application provide a readable storage medium, which stores a program or instructions, wherein the program or instructions are executed by a processor to implement the PRS ID configuration method of the first aspect, or the PRS ID configuration method of the second aspect, or the PRS ID configuration method of the third aspect.

[0063] The above technical solutions of the present application have at least the following beneficial effects:

[0064] The PRS ID configuration method of the embodiment of the present application first, the configuration management device determines the first number of positioning reference signal identifiers PRS IDs that can be allocated according to the pre-defined frame structure and frequency domain multiplexing factor, wherein the PRS IDs in the first number can have a corresponding relationship with the transmission resources (transmit PRS one or more times) of the PRS sequence; secondly, the configuration management device determines the first geographical multiplexing range of the PRS IDs according to the PRS detection distance; finally, the configuration management device configures the RSU PRS ID and the RSU PRS ID set for the RSU in the first geographical multiplexing range according to the first number, the first geographical multiplexing range, and the RSU deployment information of the RSU. In this way, it can be ensured that the PRS IDs allocated for each RSU in the first geographical multiplexing range are unique and orthogonal, which reduces the probability of collision of the transmission resources of the PRS, improves the reliability of PRS transmission, and reduces the complexity of reception at the receiving end. BRIEF DESCRIPTION OF DRAWINGS

[0065] Figure 1 One of the flowcharts of the PRS ID configuration method of the embodiment of the present application;

[0066] Figure 2 The second flowchart of the PRS ID configuration method of the embodiment of the present application;

[0067] Figure 3 The third flowchart of the PRS ID configuration method of the embodiment of the present application;

[0068] Figure 4 One of the structure diagrams of the PRS ID configuration device of the embodiment of the present application;

[0069] Figure 5 The second structure diagram of the PRS ID configuration device of the embodiment of the present application;

[0070] Figure 6 The third structure diagram of the PRS ID configuration device of the embodiment of the present application;

[0071] Figure 7 The structure diagram of the configuration management device of the embodiment of the present application. DETAILED DESCRIPTION

[0072] To make the technical problems, technical solutions and advantages of the present application clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of embodiments of the present application. Therefore, it should be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of known functions and configurations are omitted for clarity and conciseness.

[0073] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0074] In various embodiments of the present application, it should be understood that the size of the serial number of the following processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0075] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that the determination of B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0076] In the following, the specific implementation of the PRS ID configuration method, device and equipment of the embodiments of the present application will be described in conjunction with the accompanying drawings.

[0077] The embodiments of the present application provide a PRS ID configuration method, which is applied to a configuration management device, such as a base station, as shown in the figure, and the method comprises the steps of: Figure 1 As shown in the figure, the method comprises the steps of:

[0078] Step 101, determining a first number of positioning reference signal identifications PRS IDs that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor;

[0079] Here, the frame structure is a protocol predefined frame structure, wherein the frame structure comprises resources carrying PRS; specifically, the protocol predefined frame structure comprises a guard period (GP) symbol, the GP symbol is capable of carrying a PRS sequence, and the transmission and reception of the PRS sequence are completely independent of the transmission and reception of service data carried by other symbols in the frame structure; more specifically, the GP symbol is sequentially divided into a first GP part, a part for carrying a PRS sequence (which can carry one or more identical PRS sequences), and a second GP part in the time domain, and the part for carrying the PRS sequence occupies all subcarriers of the system bandwidth in the frequency domain; in addition, the subcarriers for carrying the PRS sequence are divided into a plurality of orthogonal subcarrier groups, and adjacent subcarriers in each subcarrier group are equally spaced in the frequency domain, wherein the number of orthogonal subcarrier groups is the ratio of the total number of subcarriers carrying PRS sequences in the system to the inter-user frequency domain multiplexing factor, and the PRS sequence transmitted by each user equipment is carried on a subcarrier group; in addition, the PRS sequence uses a ZC sequence, wherein the value of the ZC sequence is determined by the length of a first sequence from which the ZC sequence is generated, and the length of the first sequence is related to the number of subcarriers in the subcarrier group.

[0080] In addition, by code division multiplexing, the subcarriers in each subcarrier group can be used to transmit a plurality of groups of PRS sequences; wherein each subcarrier group and a group of PRS sequences carried on the subcarrier group correspond to a PRS ID, and each PRS ID corresponds to a user equipment, that is, the protocol also predefines the correspondence between the transmission resource (group number of the subcarrier group and sequence number of the PRS sequence) and the PRS ID, that is, the correspondence between the PRS ID and the subcarrier group and the PRS sequence is predefined in advance; for example, the transmission resource (used to transmit a PRS sequence or a plurality of PRS sequences, such as the group number of the subcarrier group carrying the PRS sequence and the sequence number of the PRS sequence) of a specific PRS sequence corresponds to a PRS ID; finally, for the above predefined frame structure, the frequency domain resources carrying the PRS sequence can be allocated to each PRS ID according to the frequency domain multiplexing priority or the code domain multiplexing priority principle;

[0081] In this step, specifically, the resources capable of carrying PRS sequences can be determined based on the predefined frame structure, and further based on the frequency domain multiplexing factor and the number of resources capable of carrying PRS sequences, the number of users that the resources for carrying PRS sequences can provide for transmitting PRS sequences is determined, and the number of users is the first number; wherein the frequency domain multiplexing factor is related to the product of the frequency division coefficient and the code division coefficient;

[0082] At step 102, a first geographical multiplexing range of the PRS ID is determined according to a detection distance of the PRS; here, the detection distance of the PRS is the detection distance of the PRS in a deployed channel environment and a corresponding scene; the first geographical multiplexing range can be N times of the detection distance of the PRS to ensure that the PRS ID can be completely multiplexed. Specifically, the detection distance of the PRS can be obtained by link budget or actual measurement, etc. In this step, for example, it is determined that the detection distance of the PRS is 300 meters, and it is determined that the maximum multiplexing coefficient is 2 times of the detection distance of the PRS, then the first geographical multiplexing range of the PRS ID is determined to be 600 meters;

[0083] At step 103, the RSU PRS ID and the RSU PRS ID set are configured for the RSU in the first geographical multiplexing range according to the first quantity, the first geographical multiplexing range, and the RSU deployment information; here, the RSU PRS ID set includes candidate PRS IDs allocated to the RSU in the first geographical multiplexing range; that is, the PRS ID allocated to each RSU in the first geographical multiplexing range is an element in the RSU PRS ID set.

[0084] The PRS ID configuration method of the embodiment of the application first determines the first quantity of the PRS ID that can be allocated by the configuration management device according to the pre-defined frame structure and the frequency domain multiplexing factor, wherein the PRS ID in the first quantity can correspond to the transmission resource (transmitting the PRS once or multiple times) of one PRS sequence one by one; secondly, the configuration management device determines the first geographical multiplexing range of the PRS ID according to the detection distance of the PRS; finally, the configuration management device configures the RSU PRS ID and the RSU PRS ID set for the RSU in the first geographical multiplexing range according to the first quantity, the first geographical multiplexing range, and the RSU deployment information. In this way, the PRS ID allocated to each RSU in the first geographical multiplexing range can be ensured to be unique and orthogonal, which reduces the probability of collision of the transmission resource of the PRS, improves the reliability of the PRS transmission, and reduces the complexity of the receiving end.

[0085] As an optional implementation, step 103 includes:

[0086] (1) configuring the RSU PRS ID set according to the first quantity, the first geographical multiplexing range, and the RSU deployment information; specifically, this step includes:

[0087]

[0088]

[0089]

[0090]

[0091] In this optional implementation, first, the RSU PRS ID set is configured based on the first geographical multiplexing range and the RSU deployment information, wherein each element in the RSU PRS ID set corresponds to a specific PRS sequence transmission resource, and second, the RSU PRS ID is configured for each RSU in the first geographical multiplexing range based on the RSU PRS ID set, so that the collision of PRS transmission can be avoided, the reliability of PRS transmission is improved, and the receiving complexity of the receiving end is reduced.

[0092] As a specific implementation, the RSU PRS ID is configured for each RSU in the first geographical multiplexing range based on the RSU PRS ID set, including:

[0093] ​​​​The RSU PRS IDs are configured for the RSUs in sequence according to the geographical positions of the RSUs; wherein the RSU PRS IDs configured for the RSUs are elements in the RSU PRS ID set. That is, when the RSU PRS IDs are configured for the RSUs, the RSU PRS IDs are continuously assigned to the RSUs according to the deployment positions of the RSUs.

[0094] An example of the specific implementation is as follows: continuing the previous example, if the RSU PRS IDs actually assigned to the RSUs are {1, 2, 3, 4, 5, 6, 7}, the RSU PRS IDs are assigned to the RSUs in sequence according to the geographical positions. Further, in the second geographical multiplexing range, the {1, 2, 3, 4, 5, 6, 7} are re-assigned in sequence, so that it can be ensured that two RSUs in a geographical multiplexing range do not multiplex the RSU PRS IDs, that is, the geographical distance of the nodes multiplexing the same RSU PRS ID is not less than the geographical multiplexing range.

[0095] Further, in the embodiment of the present application, after the RSU PRS ID set is configured, the management device can further configure an OBU PRS ID set based on the first number and the RSU PRS ID set; wherein the sum of the number of elements in the RSU PRS ID set and the number of elements in the OBU PRS ID set is the first number; that is, the elements in the OBU PRS ID set are the PRS IDs configured by the management device except the elements in the RSU PRS ID set, that is, there is no overlap between the elements in the two PRS ID sets, that is, the RSU PRS ID set and the OBU PRS ID set are orthogonal. Based on this, the management device can configure the OBU PRS ID set for the RSUs in the first geographical multiplexing range while configuring the RSU PRS ID and the RSU PRS ID set for the RSUs, so as to realize that the RSUs broadcast the OBU PRS ID set, and facilitate the OBU to select the corresponding OBU PRS ID based on the OBU PRS ID set.

[0096] In the PRS ID configuration method of the embodiments of the present application, the configuration management device determines the number of PRS IDs that the configuration management device can configure based on a predefined frame structure and a frequency domain multiplexing factor, then divides the geographical position multiplexing range based on the PRS detection distance, so as to allocate PRS IDs for devices (such as RSUs) in each geographical position multiplexing range, so that the PRS IDs of each RSU do not overlap, thereby ensuring that the PRSs transmitted by each RSU do not collide, which can improve the reliability of PRS transmission. In addition, the PRS IDs that the configuration management device can configure are divided into different sets (RSU PRS ID set and OBU PRS ID set), so that the receiving end can perform blind detection on the subcarriers corresponding to a specific set based on the PRS to be received, thereby reducing the detection range and reducing the receiving complexity.

[0097] The embodiments of the present application also provide a PRS ID configuration method, which is applied to a first RSU, as shown in the following figure: Figure 2 The method comprises the following steps:

[0098] In step 201, the RSU PRS ID and the RSU PRS ID set configured by the configuration management device are obtained; here, the RSU PRS ID and the RSU PRS ID set can be obtained through wired mode, network interface mode or software upgrade mode, etc.; that is, the RSU can make the configuration message of the configuration management device effective through any of the above modes, and the configuration message includes the RSU PRS ID and the RSU PRS ID set; in another way, the first RSU can obtain the configuration message of the configuration management device through any of the above modes, but is not limited to these modes, and the configuration message includes the RSU PRS ID and the division mode of the PRS ID by the configuration management device, wherein the division mode can be represented by the RSU PRS ID set and / or the OBU PRS ID set, that is, the configuration management device divides the PRS ID into the RSU PRS ID set and the OBU PRS ID set; or the configuration management device divides part of the PRS IDs into the RSU PRS ID to form the RSU PRS ID set, and the RSU can calculate the candidate PRS ID of the OBU based on the received RSU PRS ID set;

[0099] Step 202, in the case that the first RSU only needs to receive PRS sent by other RSUs, performing blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS ID and subcarrier group and PRS sequence; that is, in the case that the first RSU needs to receive PRS sent by surrounding other RSUs, blind detection can be performed only on resources corresponding to each ID in the RSU PRS ID set, so that the range of blind detection can be reduced and the complexity of reception can be reduced.

[0100] Here, the correspondence in step 202 can be predefined by a protocol and can be configured for the RSU by the configuration management device, so that the configuration management device can configure the RSU with the correspondence when configuring the RSU with the RSU PRS ID and the RSU PRS ID set, that is, the aforementioned management configuration information can include the RSU PRS ID, the RSU PRS ID set, and the correspondence configured for the RSU.

[0101] The PRS ID configuration method of the embodiment of the application first enables the first RSU to obtain the RSU PRS ID and the RSU PRS ID set configured by the configuration management device, so that the first RSU can perform PRS transmission based on the RSU PRS ID configured for the first RSU, avoid PRS transmission collision, and improve PRS transmission reliability; secondly, in the case that the first RSU only needs to receive PRS sent by other RSUs, blind detection is performed on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS ID and subcarrier group and PRS sequence, so that the range of blind detection can be reduced and the complexity of reception can be reduced.

[0102] As an optional implementation, step 202 includes:

[0103] In the case that the configuration management device assigns RSU PRS IDs to each RSU in the order of the geographical position of the RSU, the second target RSU PRS ID is determined according to the RSU PRS ID configured for the first RSU and the first value; the second target RSU PRS ID includes the first value of RSU PRS IDs before the RSU PRS ID configured for the first RSU and the first value of RSU PRS IDs after the RSU PRS ID configured for the first RSU; that is, the RSU corresponding to the second target RSU PRS ID is the PRS ID of an RSU close to the first RSU.

[0104] According to the correspondence between the PRS ID and the subcarrier group and the PRS sequence, blind detection is performed on the subcarrier group corresponding to the second target RSU PRS ID.

[0105] That is, in the optional implementation, when the configuration management device assigns RSU PRS IDs to each RSU in turn according to the deployment positions of the RSUs (for example, RSU1, RSU2 and RSU3 are three RSUs that are adjacent in geographical position in turn, and the configuration management device assigns RSU PRS IDs 1, 2 and 3 to the three RSUs in turn), the first RSU can determine a plurality of RSUs close to it based on the RSU PRS ID, and perform blind detection on the subcarrier groups corresponding to the RSU PRS IDs, so as to further reduce the range of blind detection and reduce the complexity of reception.

[0106] Further, as an optional implementation, the method further comprises:

[0107] Obtaining an OBU PRS ID set; wherein the OBU PRS ID set is determined according to the RSU PRS ID set, or configured by the configuration management device; for example, when the OBU PRS ID set is determined according to the RSU PRS ID set, the first RSU can determine the OBU PRS ID set based on the number of PRS IDs (the first number) that the configuration management device can configure and the RSU PRS ID set, wherein the RSU PRS ID set determines the OBU PRS ID set complementarily, here, complementarily means that among the first number of PRS IDs, the PRS IDs that are not configured as the RSU PRS ID set are elements of the OBU PRS ID set; when the OBU PRS ID set is configured by the configuration management device, the configuration management device directly divides the first number of PRS IDs into the RSU PRS ID set and the OBU PRS ID set, and configures the two divided sets to the first RSU, and as described above, the OBU PRS ID set is carried in the configuration information.

[0108] In the case that the first RSU needs to receive the PRS sent by the OBU, according to the predefined correspondence between the PRS ID and the subcarrier group and the PRS sequence, blind detection is performed on the subcarriers corresponding to each element in the OBU PRS ID set.

[0109] Similarly, in the optional implementation, in the case that the first RSU needs to receive the PRS sent by the OBU, the subcarrier group and the PRS sequence corresponding to each element in the OBU PRS ID set can be determined based on the correspondence between the PRS ID and the subcarrier group and the PRS sequence, and further, only the subcarriers corresponding to each element in the OBU PRS ID set are blindly detected, so as to reduce the range of blind detection and reduce the complexity of reception.

[0110] Further, as an optional implementation, the method further comprises:

[0111] According to the blind detection result of the subcarriers corresponding to each element in the OBU PRS ID set, the OBU PRS ID set is dynamically maintained; that is, based on the blind detection result, the elements in the OBU PRS ID set are updated; for example, based on the blind detection result, it is determined that at least one element in the OBU PRS ID set is occupied, and then the state of the occupied element is set to a busy state.

[0112] According to the maintenance result of the OBU PRS ID set, an idle OBU PRS ID set is periodically broadcasted, wherein the idle OBU PRS ID set is a set of OBU PRS IDs that are not occupied by any OBU in the OBU PRS ID set; in this step, the idle OBU PRS ID can be indicated by bitmap, for example, when the bitmap length is 10, it can indicate whether the IDs from 1 to 10 are available, wherein 0 in the bitmap indicates that the corresponding PRS ID is not available, and 1 in the bitmap indicates that the corresponding PRS ID is available. For example, the bitmap is 1100000011, which means that 1, 2, 9 and 10 are optional IDs. Of course, other ways can also be used to represent the available OBU PRS ID, which will not be illustrated one by one here.

[0113] As an example, when the first RSU is an RSU at a specific location, such as a tunnel or an indoor scene, and 1 to 3 RSUs near the entrance and exit (these RSUs have better synchronization effect with the Global Navigation Satellite System (GNSS)), the first RSU can perform the steps of the optional implementation.

[0114] In the optional implementation, by broadcasting the idle OBU PRS ID set, the OBU can select a PRS ID that is not occupied, so as to avoid the situation that different OBUs select the same PRS ID, causing collision in PRS transmission, thereby improving the reliability of OBU PRS transmission.

[0115] As a specific implementation, the OBU PRS ID set is dynamically maintained according to the blind detection result of the subcarriers corresponding to each element in the OBU PRS ID set, including:

[0116] In the case where at least one OBU PRS ID is determined to be occupied by an OBU according to the blind detection result, the state of the at least one OBU PRS ID is set to a non-idle state within a first time length; and after the first time length, the at least one OBU PRS ID is re-set to an idle state.

[0117] That is, when the first RSU confirms the existence of an occupied OBU PRS ID based on the received PRS, the first RSU sets the state of the occupied OBU PRS ID to a busy state, and at the same time, the first RSU sets a timer, and before the timer expires, the state of the OBU PRS ID is busy, and after the timer expires, the state of the OBU PRS ID is idle and the timer is closed, so that after the timer expires, the OBU PRS ID is placed in the idle ID set again. The time length of the timer can be determined based on the time when the vehicle where the OBU is located exits the geographical location multiplexing range of the first RSU, that is, the time length of the timer can be the ratio of the geographical location multiplexing range and the vehicle speed, and here the vehicle speed can be the minimum vehicle speed, so as to avoid the state of the OBU PRS ID being re-set to an idle state when the vehicle has not exited the geographical location multiplexing range (i.e., the OBU PRS ID is in a used state), causing different OBUs to select the same OBU PRS ID and causing PRS collision. For example, in the case where PRS ID 100 is determined to be occupied according to the blind detection result, an ID invalidation timer is started, and assuming that it is configured to 10 minutes according to the actual scene, the ID will be recycled to the idle ID set after 10 minutes.

[0118] The PRS ID configuration method of the embodiments of the present application, first, the first RSU performs blind detection on the subcarriers corresponding to each element in the RSU PRS ID set according to the pre-defined correspondence between PRS ID and subcarrier group and PRS sequence in the case of only needing to receive PRS sent by other RSUs; in the case of needing to receive PRS sent by OBU, blind detection is performed on the subcarriers corresponding to each element in the OBU PRS ID set according to the pre-defined correspondence between PRS ID and subcarrier group and PRS sequence. In this way, the range of blind detection is reduced, and the complexity of reception is reduced; second, the first RSU also dynamically maintains the OBU PRS ID set based on the blind detection result, so that the OBU can select an ID in the idle PRS ID set, avoiding the case that different OBUs select the same PRS ID, causing collision in PRS transmission, so as to improve the reliability of PRS transmission.

[0119] The embodiments of the present application also provide a PRS ID configuration method, which is applied to a first OBU, as shown in the figure, the method comprises the following steps: Figure 3

[0120] Step 301, receiving an idle OBU PRS ID set periodically broadcasted by a first RSU; as described above, the elements in the OBU PRS ID set can be indicated by bitmap, but not limited thereto;

[0121] Step 302, selecting a target OBU PRS ID in the OBU PRS ID set, wherein the target OBU PRS ID is an OBU PRS ID currently needed to be occupied by the first OBU.

[0122] Here, it needs to be explained that, as described above, the relevant protocol has pre-defined the correspondence between PRS ID and subcarrier group and PRS sequence carrying PRS, that is, each OBU PRS ID corresponds to a subcarrier group and a PRS sequence;

[0123] In the embodiments of the present application, the first OBU selects an OBU PRS ID for itself based on the received idle OBU PRS ID set, so that the selected OBU PRS ID is not occupied by other OBUs, that is, to avoid the case that different OBUs select the same OBU PRS ID, so as to avoid the collision of PRS sent by OBU, and improve the reliability of PRS transmission.

[0124] ​In addition, it should be noted that, in the case that the first OBU does not receive the set of idle OBU PRS IDs within the preset time length, an OBU PRS ID can be randomly selected, and here, the OBU PRS ID can be randomly selected from the set of OBU PRS IDs configured by the configuration management device, or the set of OBU PRS IDs can be calculated based on the RSU PRS ID configured by the configuration management device, and a PRS ID can be randomly selected from the set of OBU PRS IDs.

[0125] As an optional implementation, the method further includes:

[0126] randomly generating a PRS transmission pattern; the PRS transmission pattern can indicate time slots in which the first OBU transmits PRS and time slots in which the first OBU gives up transmitting PRS;

[0127] obtaining a target subcarrier group and a target PRS sequence corresponding to the target OBU PRS ID according to the target OBU PRS ID and a predefined correspondence between a PRS ID and a subcarrier group and a PRS sequence; here, the correspondence between the PRS ID and the subcarrier group and the PRS sequence can be obtained through a message transmitted by the RSU, and as described above, the RSU can obtain the correspondence between the PRS ID and the subcarrier group and the PRS sequence from the configuration management device;

[0128] within a second time length corresponding to the access process, transmitting PRS based on the target PRS sequence on the target subcarrier group according to the PRS transmission pattern, that is, within a time period in which the access process timer does not expire, transmitting the target PRS sequence on the subcarriers of the target subcarrier group in the transmission time slots indicated by the PRS transmission pattern.

[0129] Further, as an optional implementation, the method further includes:

[0130] receiving PRS in the time slots in which the first OBU gives up transmitting PRS according to the PRS transmission pattern;

[0131] reselecting the target OBU PRS ID from the set of idle OBU PRS IDs in the case that a PRS ID corresponding to the received PRS is the same as the target OBU PRS ID; that is, the first OBU detects that the OBU PRS ID selected by another OBU is the same as the OBU PRS ID selected by the first OBU, and since the first OBU has not successfully accessed, in order to avoid PRS ID collision, the first OBU reselects an OBU PRS ID in an idle state, and thus the reliability of PRS transmission can be improved.

[0132] In addition, in the case that the PRS ID corresponding to the received PRS is different from the target OBU PRS ID, the target OBU PRS ID is continuously used until the end of the PRS transmission.

[0133] A specific example of the above two optional implementations is as follows: assuming that the access process timer is set to 100 ms, the first OBU randomly selects some slots to abandon PRS transmission within 100 ms, and the selection of the slots is as random as possible, for example, user A randomly selects 1 time to abandon transmission in 5 times; user B randomly selects 1 time to abandon transmission in 6 times; the OBU performs PRS reception in the slots abandoned for transmission; on the one hand, if the ID (target OBU PRS ID) corresponding to itself is detected in the abandoned transmission opportunity before the access timer expires, the PRS ID selected by itself is changed, and the process is re-executed; on the other hand, if the ID (target OBU PRS ID) corresponding to itself is not detected in the abandoned transmission opportunity before the timer expires, the PRS ID is continuously used until the end of the PRS ID transmission (self-synchronization function is closed, etc.).

[0134] Further, as an optional implementation, the method further includes:

[0135] receiving the RSU PRS ID set transmitted by the RSU;

[0136] According to the predefined correspondence between the PRS ID, the subcarrier group, and the PRS sequence, blind detection is performed on the subcarriers corresponding to each element in the RSU PRS ID set, and here, the first OBU only performs blind detection on the subcarriers corresponding to the RSU PRS ID set, which can reduce the range of blind detection and reduce the complexity of reception.

[0137] As a specific implementation, according to the predefined correspondence between the PRS ID, the subcarrier group, and the PRS sequence, blind detection is performed on the subcarriers corresponding to each element in the RSU PRS ID set, including:

[0138] In the case that the configuration management device continuously allocates RSU PRS IDs to each RSU in the order of the geographical positions of the RSUs (i.e., the RSU PRS IDs configured for adjacent RSUs are continuous), according to the correspondence between the PRS ID, the subcarrier group, and the PRS sequence, the RSU PRS ID corresponding to the PRS with the strongest signal in the received PRS is determined; here, the RSU PRS ID corresponding to the PRS with the strongest signal is the PRS ID of the RSU closest to the first OBU;

[0139] According to the RSU PRS ID corresponding to the strongest signal PRS and the RSU PRS ID set, a second number of third target RSU PRS IDs are determined; wherein the RSU corresponding to the second number of third target RSU PRS IDs is adjacent to the RSU corresponding to the strongest signal PRS in geographical position;

[0140] The blind detection is performed on the RSU PRS ID corresponding to the strongest signal PRS and the subcarrier corresponding to the third target RSU PRS ID; in this way, the range of blind detection can be further reduced, and the complexity of reception is reduced.

[0141] That is, in the optional implementation, under the premise of continuous PRS ID configuration of the RSU based on geographical position, the first OBU can determine the ID of the adjacent M RSUs according to the received strongest signal RSU PRS ID and the RSU PRS ID set, thereby reducing the range of blind detection.

[0142] The embodiments of the present application also provide a PRS ID configuration device, which is applied to a configuration management device, such as a base station, and includes: Figure 4 As shown in the figure, it includes:

[0143] The first determining module 401 is configured to determine a first number of positioning reference signal identifications (PRS IDs) that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor;

[0144] The second determining module 402 is configured to determine a first geographical position multiplexing range of the PRS IDs according to a PRS detection distance;

[0145] The configuration module 403 is configured to configure RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical position multiplexing range according to the first number, the first geographical position multiplexing range, and RSU deployment information.

[0146] Optionally, the configuration module 403 includes:

[0147] The first configuration submodule is configured to configure the RSU PRS ID set according to the first number, the first geographical position multiplexing range, and the RSU deployment information;

[0148] The second configuration submodule is configured to configure RSU PRS IDs for each RSU in the first geographical position multiplexing range according to the RSU PRS ID set.

[0149] Optionally, the first configuration submodule includes:

[0150] The first determining unit is configured to determine the number of RSUs in the first geographical location multiplexing range according to the RSU deployment information.

[0151] The second determining unit is configured to determine the number of RSU PRS IDs according to the first number and the number of RSUs; the number of RSU PRS IDs is greater than or equal to the number of RSUs and less than or equal to the first number.

[0152] The third determining unit is configured to determine the set of RSU PRS IDs according to the number of RSU PRS IDs.

[0153] Optionally, the second configuration sub-module comprises:

[0154] The configuration unit is configured to configure RSU PRS IDs for each RSU in sequence of the geographical locations of the RSUs; the RSU PRS ID configured for each RSU is an element in the set of RSU PRS IDs.

[0155] It should be noted that the above PRS ID configuration apparatus provided by the embodiments of the present application can realize all the method steps achieved by the PRS ID configuration method applied to the configuration management device, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0156] The embodiments of the present application also provide a PRS ID configuration apparatus applied to a first RSU, as shown in the following table, comprising: Figure 5

[0157] The acquisition module 501 is configured to acquire the RSU PRS ID and the set of RSU PRS IDs configured by the configuration management device.

[0158] The first detection module 502 is configured to, in the case that the first RSU only needs to receive PRS sent by other RSUs, perform blind detection on subcarriers corresponding to each element in the set of RSU PRS IDs according to a pre-defined correspondence between PRS IDs and subcarrier groups and PRS sequences.

[0159] Optionally, the first detection module 502 comprises:

[0160] ​determining a second target RSU PRS ID according to the RSU PRS ID configured for the first RSU and the first number of values, in a case that the configuration management device assigns RSU PRS IDs to respective RSUs in a sequence of the geographical positions of the RSUs; wherein the second target RSU PRS ID comprises: a first number of RSU PRS IDs before the RSU PRS ID configured for the first RSU, and a first number of RSU PRS IDs after the RSU PRS ID configured for the first RSU;

[0161] detecting, according to the correspondence between the PRS ID configured for the first RSU and the subcarrier group and the PRS sequence, the subcarrier group corresponding to the second target RSU PRS ID.

[0162] Optionally, the apparatus further comprises:

[0163] obtaining an OBU PRS ID set; wherein the OBU PRS ID set is determined according to the RSU PRS ID set, or is configured by the configuration management device;

[0164] second detecting, according to a predefined correspondence between the PRS ID and the subcarrier group and the PRS sequence, the subcarrier corresponding to each element in the OBU PRS ID set, in a case that the first RSU needs to receive PRS sent by an OBU.

[0165] Optionally, the apparatus further comprises:

[0166] maintaining the OBU PRS ID set according to the blind detection result of the subcarrier corresponding to each element in the OBU PRS ID set;

[0167] broadcasting, according to the maintenance result of the OBU PRS ID set, an idle OBU PRS ID set periodically, wherein the idle OBU PRS ID set is a set of OBU PRS IDs in the OBU PRS ID set that are not occupied by any OBU.

[0168] Optionally, the maintaining is specifically configured to: set a state of at least one OBU PRS ID as a non-idle state within a first time length, in a case that the at least one OBU PRS ID is determined to be occupied by an OBU according to the blind detection result; and reset the at least one OBU PRS ID as an idle state after the first time length.

[0169] It should be noted that the PRS ID configuration apparatus provided by the embodiments of the present application can realize all the method steps realized by the PRS ID configuration method applied to the first RSU, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0170] The embodiments of the present application also provide a PRS ID configuration apparatus applied to a first OBU, as shown in the following table, comprising: Figure 6

[0171] The first receiving module 601 is configured to receive a set of idle OBU PRS IDs periodically broadcast by a first RSU.

[0172] The first selecting module 602 is configured to select a target OBU PRS ID from the set of OBU PRS IDs, wherein the target OBU PRS ID is an OBU PRS ID currently needed to be occupied by the first OBU.

[0173] Optionally, the apparatus further comprises:

[0174] The processing module is configured to randomly generate a PRS transmission pattern.

[0175] The obtaining module is configured to obtain a target subcarrier group and a target PRS sequence corresponding to the target OBU PRS ID according to the target OBU PRS ID and a predefined correspondence between PRS IDs and subcarrier groups and PRS sequences.

[0176] The sending module is configured to send PRS on the target subcarrier group based on the target PRS sequence according to the PRS transmission pattern within a second time length corresponding to an access process.

[0177] Optionally, the apparatus further comprises:

[0178] The second receiving module is configured to receive PRS in a time slot in which PRS is not sent according to the PRS transmission pattern.

[0179] The second selecting module is configured to reselect a target OBU PRS ID from the set of idle OBU PRS IDs in a case where a PRS ID corresponding to the received PRS is the same as the target OBU PRS ID.

[0180] Optionally, the apparatus further comprises:

[0181] The third receiving module is configured to receive a set of RSU PRS IDs sent by an RSU.

[0182] ​The detection module is configured to perform blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs, subcarrier groups, and PRS sequences.

[0183] Optionally, the detection module comprises:

[0184] The first determination sub-module is configured to, in the case where the configuration management device continuously allocates RSU PRS IDs to each RSU in the order of the geographical positions of the RSUs, determine, according to the correspondence between PRS IDs, subcarrier groups, and PRS sequences, the RSU PRS ID corresponding to the PRS with the strongest signal in the received PRS.

[0185] The second determination sub-module is configured to determine a second number of third target RSU PRS IDs according to the RSU PRS ID corresponding to the PRS with the strongest signal and the RSU PRS ID set, wherein the RSUs corresponding to the second number of third target RSU PRS IDs are adjacent to the RSU sending the PRS with the strongest signal in geographical position.

[0186] The detection sub-module is configured to perform blind detection on subcarriers corresponding to the RSU PRS ID corresponding to the PRS with the strongest signal and the third target RSU PRS ID.

[0187] It should be noted that the above PRS ID configuration apparatus provided by the embodiments of the present application can implement all the method steps achieved by the above PRS ID configuration method applied to the first OBU, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0188] As shown in Figure 7 The present application also provides a configuration management device, which comprises a transceiver 710, a processor 700, a memory 720, and a program or instruction stored in the memory 720 and executable on the processor 700; and the processor 700 implements the above PRS ID configuration method applied to the configuration management device when executing the program or instruction.

[0189] The transceiver 710 is configured to receive and send data under the control of the processor 700.

[0190] In the above embodiments, the configuration management device is configured to perform the above PRS ID configuration method applied to the configuration management device. Figure 7In particular embodiments, the bus architecture can include any number of interconnecting buses and bridges, depending on the specific application of the processor 700. The bus architecture can link various circuits of the various circuitries represented by the processor 700 and the memory 720, which is represented by one or more processors and memories, respectively. The bus architecture can also link various other circuitries, such as peripheral devices, voltage regulators, and power management circuitries, which are well known in the art and thus, are not further described herein. The bus interface provides an interface. The transceiver 710 can be a plurality of elements, i.e., including a transmitter and a receiver, which provides a means for communicating with various other apparatuses over a transmission medium. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 in executing operations.

[0191] The embodiments of the present application further provide an RSU, which is a first RSU, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements the PRS ID configuration method applied to the first RSU when executing the computer program.

[0192] The embodiments of the present application further provide an OBU, which is a first OBU, comprising a transceiver, a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements the PRS ID configuration method applied to the first OBU when executing the computer program.

[0193] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by instructing the related hardware by a computer program, the computer program including instructions for executing part or all of the steps of the above-mentioned method; and the computer program can be stored in a readable storage medium, which can be any form of storage medium.

[0194] Based on this, the embodiments of the present application further provide a readable storage medium, which stores a program or instructions, and the program or instructions are executed by a processor to implement the PRS ID configuration method applied to the configuration management device, or to implement the PRS ID configuration method applied to the first RSU, or to implement the PRS ID configuration method applied to the first RSU, and achieve the same technical effects. To avoid repetition, they are not described here. The computer readable storage medium, such as read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disk, etc.

[0195] Moreover, it is pointed out that, in the present application, the components or steps can be decomposed and / or recombined. These decompositions and / or recombination should be considered as equivalent solutions within the present application. Also, the steps of performing the above-mentioned series of processes can be executed naturally in the order described or in a time sequence, but do not necessarily have to be executed in a time sequence, and some steps can be executed in parallel or independently of each other. It can be understood by those skilled in the art that all or any steps or components of the method and device of the present application can be implemented in hardware, firmware, software, or a combination thereof, in any computing device (including a processor, a storage medium, etc.) or a network of computing devices, by using the basic programming skills of those skilled in the art after reading the description of the present application.

[0196] Therefore, the purpose of the present application can also be achieved by running a program or a set of programs on any computing device. The computing device can be a commonly known general-purpose device. Therefore, the purpose of the present application can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present application, and a storage medium storing such a program product can also constitute the present application. Obviously, the storage medium can be any commonly known storage medium or any storage medium developed in the future.

[0197] Finally, it should also be noted that, in this document, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0198] The above is the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the principles described in the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method for configuring a Positioning Reference Signal Identifier (PRS ID), characterized in that, The application is applied to a configuration management device, comprising: According to a predefined frame structure and a frequency domain multiplexing factor, a first number of positioning reference signal identifiers (PRS IDs) that can be allocated is determined; According to a PRS detection distance, a first geographical multiplexing range of PRS IDs is determined; According to the first number, the first geographical multiplexing range, and roadside unit (RSU) deployment information, RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical multiplexing range are configured; wherein the RSU PRS ID is used for an RSU to determine a transmission resource of a PRS according to a predefined correspondence between a transmission resource and a PRS ID; and the RSU PRS ID set is used to limit a range of blind detection of subcarriers by the RSU when the RSU only needs to receive PRS transmitted by other RSUs or an on-board unit (OBU) only needs to receive PRS transmitted by the RSU; Based on the first number and the RSU PRS ID set, an OBU PRS ID set is configured, wherein the RSU PRS ID set and the OBU PRS ID set are orthogonal, and the OBU PRS ID set is used to limit a range of blind detection of subcarriers by the RSU when the RSU only needs to receive PRS transmitted by an OBU or the OBU only needs to receive PRS transmitted by other OBUs.

2. The method of claim 1, wherein, According to the first number, the first geographical multiplexing range, and RSU deployment information, RSU PRS IDs and RSU PRS ID sets for RSUs in the first geographical multiplexing range are configured, comprising: According to the first number, the first geographical multiplexing range, and the RSU deployment information, an RSU PRS ID set is configured; According to the RSU PRS ID set, RSU PRS IDs for each RSU in the first geographical multiplexing range are configured.

3. The method of claim 2, wherein, According to the first number, the first geographical multiplexing range, and the RSU deployment information, an RSU PRS ID set is configured, comprising: According to the RSU deployment information, a number of RSUs in the first geographical multiplexing range is determined; According to the first number and the number of RSUs, a number of RSU PRS IDs is determined; wherein the number of RSU PRS IDs is greater than or equal to the number of RSUs and less than or equal to the first number; According to the number of RSU PRS IDs, the RSU PRS ID set is determined.

4. The method of claim 2, wherein, According to the RSU PRS ID set, RSU PRS IDs for each RSU in the first geographical multiplexing range are configured, comprising: RSU PRS IDs are configured for each RSU in sequence of the geographical positions of the RSUs; wherein the RSU PRS ID configured for each RSU is an element in the RSU PRS ID set.

5. A positioning reference signal identity, PRS ID, configuration method, the method comprising: The application is applied to a first RSU, comprising: Obtain a RSU PRS ID and a RSU PRS ID set configured by a configuration management device; wherein the configuration process of the RSU PRS ID and the RSU PRS ID set comprises: determining a first number of PRS IDs that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor; determining a first geographical multiplexing range of PRS IDs according to a PRS detection distance; and configuring the RSU PRS ID and the RSU PRS ID set for the RSU in the first geographical multiplexing range according to the first number, the first geographical multiplexing range, and RSU deployment information, wherein the RSU PRS ID set comprises candidate PRS IDs allocated for the RSU in the first geographical multiplexing range; Transmit PRS according to the RSU PRS ID; In a case where the first RSU only needs to receive PRS transmitted by other RSUs, perform blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs and subcarrier groups and PRS sequences; Obtain an OBU PRS ID set; wherein the OBU PRS ID set is determined according to the RSU PRS ID set, or configured by the configuration management device; In a case where the first RSU needs to receive PRS transmitted by an OBU, perform blind detection on subcarriers corresponding to each element in the OBU PRS ID set according to a predefined correspondence between PRS IDs and subcarrier groups and PRS sequences.

6. The method of claim 5, wherein, The blind detection on subcarriers corresponding to each element in the RSU PRS ID set comprises: In a case where the configuration management device allocates RSU PRS IDs to each RSU in the order of the geographical positions of the RSUs, determine a second target RSU PRS ID according to the RSU PRS ID configured for the first RSU and a first number; wherein the second target RSU PRS ID comprises: the first number of RSU PRS IDs before the RSU PRS ID configured for the first RSU, and the first number of RSU PRS IDs after the RSU PRS ID configured for the first RSU; wherein twice the first number is the number of RSUs that need to be detected, and the first number is a positive integer; Perform blind detection on subcarrier groups corresponding to the second target RSU PRS ID according to the correspondence between the PRS ID configured for the first RSU and the subcarrier groups and the PRS sequences.

7. The method of claim 5, wherein, The method further comprises: Dynamically maintain the OBU PRS ID set according to the blind detection results on subcarriers corresponding to each element in the OBU PRS ID set; According to a result of maintaining the OBU PRS ID set, periodically broadcast an idle OBU PRS ID set, wherein the idle OBU PRS ID set is a set of OBU PRS IDs in the OBU PRS ID set that are not occupied by any OBU.

8. The method of claim 7, wherein, According to a result of blind detection of subcarriers corresponding to each element in the OBU PRS ID set, dynamically maintain the OBU PRS ID set, including: In a case where at least one OBU PRS ID is determined to be occupied by an OBU according to the blind detection result, setting a state of the at least one OBU PRS ID to a non-idle state within a first time length; and after the first time length, resetting the at least one OBU PRS ID to an idle state.

9. A positioning reference signal identity, PRS ID, configuration method, the method comprising: Applied to a first on-board unit (OBU), comprising: receiving an idle OBU PRS ID set periodically broadcast by a first roadside unit (RSU); wherein each OBU PRS ID in the OBU PRS ID set corresponds to a subcarrier group and a PRS sequence; wherein the OBU PRS ID set includes PRS IDs configured by a configuration management device, except for elements in an RSU PRS ID set; the RSU PRS ID set includes candidate PRS IDs allocated for RSUs in a first geographical multiplexing range; the idle OBU PRS ID set is a set of OBU PRS IDs in the OBU PRS ID set that are not occupied by any OBU; selecting a target OBU PRS ID in the OBU PRS ID set, wherein the target OBU PRS ID is an OBU PRS ID that the first OBU currently needs to occupy; receiving an RSU PRS ID set sent by the RSU; wherein the RSU includes a first RSU; performing blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs and subcarrier groups and PRS sequences.

10. The method of claim 9, wherein, The method further comprises: randomly generating a PRS transmission pattern; according to the target OBU PRS ID and the predefined correspondence between PRS IDs and subcarrier groups and PRS sequences, obtaining a target subcarrier group and a target PRS sequence corresponding to the target OBU PRS ID; within a second time length corresponding to an access process, transmitting PRS on the target subcarrier group based on the target PRS sequence according to the PRS transmission pattern.

11. The method of claim 10, wherein, The method further comprises: receiving PRS in a time slot in which PRS is abandoned according to the PRS transmission pattern; in a case where a PRS ID corresponding to the received PRS is the same as the target OBU PRS ID, reselecting a target OBU PRS ID in the idle OBU PRS ID set.

12. The method of claim 9, wherein, According to the correspondence between the predefined PRS ID and the subcarrier group and the PRS sequence, blind detection is performed on the subcarriers corresponding to each element in the RSU PRS ID set, including: In the case of configuring the management device to sequentially allocate RSU PRS IDs for each RSU in the order of the geographical position of the RSU, according to the correspondence between the PRS ID and the subcarrier group and the PRS sequence, the RSU PRS ID corresponding to the PRS with the strongest signal in the received PRS is determined; According to the RSU PRS ID corresponding to the PRS with the strongest signal and the RSU PRS ID set, a second number of third target RSU PRS IDs are determined; wherein the RSU corresponding to the third target RSU PRS ID is adjacent in geographical position to the RSU sending the PRS with the strongest signal; Blind detection is performed on the subcarriers corresponding to the RSU PRS ID corresponding to the PRS with the strongest signal and the third target RSU PRS ID.

13. An apparatus for positioning reference signal identity (PRS ID) configuration, the apparatus comprising: a processor configured to: determine a PRS ID configuration for a PRS; and transmit the PRS ID configuration to a user equipment (UE). Applied to a configuration management device, comprising: A first determination module for determining a first number of positioning reference signal identifiers (PRS IDs) that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor; A second determination module for determining a first geographical position multiplexing range of PRS IDs according to a PRS detection distance; A configuration module for configuring RSU PRS IDs and RSU PRS ID sets for RSUs within the first geographical position multiplexing range according to the first number, the first geographical position multiplexing range, and RSU deployment information; wherein the RSU PRS ID is used by the RSU to determine the transmission resource of the PRS according to the predefined correspondence between the transmission resource and the PRS ID; and the RSU PRS ID set is used to limit the range of blind detection of subcarriers when the RSU only needs to receive PRS transmitted by other RSUs or the on-board unit (OBU) only needs to receive PRS transmitted by RSUs; The configuration module is further configured to configure an OBU PRS ID set based on the first number and the RSU PRS ID set, wherein the RSU PRS ID set and the OBU PRS ID set are orthogonal, and the OBU PRS ID set is used to limit the range of blind detection of subcarriers when the RSU only needs to receive PRS transmitted by OBUs or the OBU only needs to receive PRS transmitted by other OBUs.

14. An apparatus for positioning reference signal identity, PRS ID, configuration, the apparatus comprising: a processor configured to: determine a PRS ID configuration for a PRS; and transmit the PRS ID configuration. Applied to a first RSU, comprising: The acquisition module is configured to acquire a road side unit (RSU) PRS ID and a RSU PRS ID set configured by a configuration management device; wherein a configuration process of the RSU PRS ID and the RSU PRS ID set comprises: determining a first number of positioning reference signal (PRS) IDs that can be allocated according to a predefined frame structure and a frequency domain multiplexing factor; determining a first geographical multiplexing range of the PRS IDs according to a PRS detection distance; and configuring the RSU PRS ID and the RSU PRS ID set for the RSU in the first geographical multiplexing range according to the first number, the first geographical multiplexing range, and RSU deployment information, wherein the RSU PRS ID set comprises candidate PRS IDs allocated for the RSU in the first geographical multiplexing range; The first detection module is configured to, in a case where the first RSU only needs to receive PRS sent by other RSUs, perform blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs, subcarrier groups, and PRS sequences. The acquisition module is further configured to acquire an on-board unit (OBU) PRS ID set; wherein the OBU PRS ID set is determined according to the RSU PRS ID set, or configured by the configuration management device; The second detection module is configured to, in a case where the first RSU needs to receive PRS sent by an OBU, perform blind detection on subcarriers corresponding to each element in the OBU PRS ID set according to a predefined correspondence between PRS IDs, subcarrier groups, and PRS sequences.

15. An apparatus for positioning reference signal identity, PRS ID, configuration, the apparatus comprising: a processor configured to: determine a PRS ID configuration for a PRS; and transmit the PRS ID configuration. The application is applied to a first on-board unit (OBU) and comprises: The first receiving module is configured to receive a free OBU PRS ID set periodically broadcast by a first road side unit (RSU); wherein each OBU PRS ID in the OBU PRS ID set corresponds to a subcarrier group and a PRS sequence; wherein the RSU comprises the first RSU; wherein the OBU PRS ID set comprises PRS IDs in PRS IDs configured by a configuration management device, except for elements in a RSU PRS ID set; the RSU PRS ID set comprises candidate PRS IDs allocated for RSUs in a first geographical multiplexing range; and the free OBU PRS ID set is a set of OBU PRS IDs in the OBU PRS ID set that are not occupied by any OBU; The first selection module is configured to select a target OBU PRS ID from the OBU PRS ID set; wherein the target OBU PRS ID is an OBU PRS ID that the first OBU currently needs to occupy; The third receiving module is configured to receive a RSU PRS ID set sent by a RSU; wherein the RSU comprises the first RSU. The detection module is configured to perform blind detection on subcarriers corresponding to each element in the RSU PRS ID set according to a predefined correspondence between PRS IDs and pairs of subcarrier groups and PRS sequences.

16. A configuration management device comprising a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, wherein, The processor, when executing the computer program, implements the PRS ID configuration method of any one of claims 1 to 4.

17. A roadside device RSU, the RSU being a first RSU, comprising a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, characterized in that, The processor, when executing the computer program, implements the PRS ID configuration method of any one of claims 5 to 8.

18. An on-board unit (OBU), the OBU being a first OBU, comprising a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, characterized in that, The processor, when executing the computer program, implements the PRS ID configuration method of any one of claims 9 to 12.

19. A readable storage medium, having stored thereon a computer program, characterized in that, The computer program, when executed by a processor, implements the PRS ID configuration method of any one of claims 1 to 4, or the PRS ID configuration method of any one of claims 5 to 8, or the PRS ID configuration method of any one of claims 9 to 12.

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