Extended mobile communication base station positioning enhancement method and device, and storage medium

Abstract

The invention discloses an extended mobile communication base station positioning enhancement method and device, and a storage medium, and the method comprises the steps: distributing independent positioning signal resources for a plurality of radio remote units used for positioning the same terminal in a baseband processing unit according to a positioning enhancement strategy, and synchronously distributing corresponding positioning signal resources for the terminal; the remote radio units comprise a plurality of remote radio units under the same cell expansion unit or a plurality of remote radio units under different cell expansion units; the positioning signal resource comprises a downlink positioning signal resource; an uplink positioning signal resource; uplink and downlink positioning signal resources; based on the positioning enhancement strategy, obtaining positioning signal time differences and / or sent and received signal intensities between a plurality of radio remote units and the terminal; and calculating the position of the terminal according to the positioning signal time difference and / or the strength of the transmitted and received signals. According to the invention, independent signal processing at the level of the radio remote unit is realized while low cost is maintained, and the positioning precision is improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular, to an extended mobile communication base station positioning enhancement method, device, and storage medium. Background Art

[0002] Existing extended base stations connect multiple radio remote units (RRUs) through an expansion unit (EU) to expand the coverage range of a single cell and reduce the networking cost. However, such base stations have significant defects in positioning applications: all the RRUs within the same cell need to transmit the same downlink positioning signal (such as SSB or DL-PRS), resulting in the terminal being unable to distinguish the signals of different RRUs and relying only on the signals between multiple cells for positioning. Due to the large cell spacing (center distance is D1), the positioning error is relatively high, and the uplink positioning signals are uniformly processed in the uplink weighted combining unit of the expansion unit, and the baseband processing unit (BBU) cannot separate the signals from different RRUs within the same cell, and cannot utilize the advantage of the small distance (center distance is D2) between the RRUs within the cell to improve the accuracy.

[0003] In addition, when using positioning methods that rely on multi-base station cooperation (such as Multi-RTT) in the market, the synchronization error between the RRUs inside the extended base station cannot be eliminated, further limiting the positioning accuracy. Although such base stations reduce the cost through shared baseband processing, the insufficient positioning ability makes it difficult to meet the requirements of high-precision scenarios, such as indoor navigation or positioning in dense urban areas. Therefore, how to achieve independent signal processing at the RRU level while maintaining low cost has become a key challenge in improving the positioning performance of extended base stations. Summary of the Invention

[0004] Based on the above deficiencies of the prior art, the present invention provides an extended mobile communication base station positioning enhancement method, device, and storage medium, which can achieve independent signal processing at the RRU level while maintaining low cost and improve the positioning accuracy.

[0005] To solve the above technical problems, the first aspect of the present invention discloses an extended mobile communication base station positioning enhancement method, including:

[0006] According to the positioning enhancement strategy, allocate independent positioning signal resources for multiple radio remote units used to locate the same terminal in the baseband processing unit, and synchronously allocate corresponding positioning signal resources for the terminal; the radio remote units include multiple radio remote units under the same cell expansion unit or multiple radio remote units under different cell expansion units; the positioning signal resources include downlink positioning signal resources; uplink positioning signal resources; up and downlink positioning signal resources;

[0007] Based on the positioning enhancement strategy, obtain the time difference of the positioning signals between multiple remote radio units (RRUs) and the terminal and / or the signal strength of transmission and reception.

[0008] Calculate the terminal position according to the time difference of the positioning signals and / or the signal strength of transmission and reception.

[0009] The positioning enhancement strategy includes: configuring downlink positioning signal resources and / or configuring uplink positioning signal resources.

[0010] In some embodiments, the configuring of the downlink positioning signal resources includes: after the downlink replication unit of the extension unit or the downlink replication unit, inserting independent downlink positioning signals for each RRU or each transmission channel of the RRU, and synchronously sending the corresponding positioning signal resource information to the terminal.

[0011] In some embodiments, the downlink positioning signal includes at least one of the following: an independent beam identifier configured by the SSB signal, a downlink positioning reference signal based on reserved time-frequency resources.

[0012] In some embodiments, the configuring of the uplink positioning signal resources includes: configuring uplink positioning signal resources for the terminal, and extracting the uplink positioning signals received by each RRU or each receiving channel of the RRU before the uplink weighted combining unit of the extension unit.

[0013] In some embodiments, the uplink positioning signal includes at least one of the following: the sounding reference signal of the terminal, the dedicated uplink positioning reference signal of the terminal.

[0014] In some embodiments, based on the positioning enhancement strategy, obtaining the time difference of the positioning signals and / or the signal strength of transmission and reception includes:

[0015] When the positioning enhancement strategy is to configure downlink positioning signal resources, obtain the time difference of multiple downlink positioning signals arriving at the terminal and / or the signal strength of transmission and reception;

[0016] When the positioning enhancement strategy is to configure uplink positioning signal resources, obtain the time difference of multiple uplink positioning signals arriving at multiple RRUs and / or the signal strength of transmission and reception;

[0017] When the positioning enhancement strategy is to configure both downlink positioning signal resources and uplink positioning signal resources simultaneously, obtain the round-trip time difference of multiple downlink positioning signals and uplink positioning signals of the same terminal and / or the signal strength of transmission and reception of the uplink and downlink positioning signals; the round-trip time difference is the difference between the round-trip time (RTT) of the downlink positioning signals and uplink positioning signals of multiple RRUs.

[0018] In some embodiments, when the positioning enhancement strategy is to configure the downlink positioning signal resources and the uplink positioning signal resources simultaneously, obtaining the round-trip time difference between multiple downlink positioning signals and uplink positioning signals of the same terminal and / or the signal strength of the transmission and reception of the uplink and downlink positioning signals, and calculating the terminal position according to the round-trip time difference of the uplink and downlink positioning signals, includes:

[0019] Synchronize the transceiver timestamps of the uplink and downlink positioning signals of multiple remote radio units (RRUs) and the same terminal;

[0020] Eliminate the synchronization error between the remote radio units, and calculate the round-trip time difference between the uplink and downlink positioning signals of the terminal and each remote radio unit;

[0021] Based on the round-trip time difference of the uplink and downlink positioning signals of multiple remote radio units, output the terminal position through the multi-cell round-trip time positioning algorithm;

[0022] And / or, calculating the terminal position according to the signal strength of the transmission and reception of the uplink and downlink positioning signals, includes:

[0023] Calculate the downlink path loss according to the signal strength of the downlink positioning signal transmitted by multiple remote radio units and the signal strength received by the terminal, and calculate the distance between multiple remote radio units and the terminal according to the downlink path loss;

[0024] And / or, calculate the uplink path loss according to the signal strength of the uplink positioning signal transmitted by the terminal and the signal strength received by multiple remote radio units, and calculate the distance between multiple remote radio units and the terminal according to the uplink path loss;

[0025] Take the average of the distances calculated according to the uplink and downlink positioning signal strengths as the distance between multiple remote radio units and the terminal; calculate the terminal position according to the distance between multiple remote radio units and the terminal calculated by downlink or uplink or both uplink and downlink.

[0026] In a second aspect, an extended mobile communication base station positioning enhancement device is disclosed, including:

[0027] A policy configuration module, according to the positioning enhancement policy, allocates independent positioning signal resources for multiple remote radio units used to locate the same terminal in the baseband processing unit, and synchronously allocates corresponding positioning signal resources for the terminal; the remote radio units include multiple remote radio units under the same cell extension unit or multiple remote radio units under different cell extension units; the positioning signal resources include downlink positioning signal resources; uplink positioning signal resources; uplink and downlink positioning signal resources;

[0028] A signal processing module, configured in the downlink and / or uplink of the extension unit, generates and inserts independent downlink positioning signals, and extracts and separates independent uplink positioning signals;

[0029] The positioning processing module obtains the positioning signal time difference and / or the signal strength of sending and receiving between multiple radio frequency remote units and the terminal based on the positioning enhancement strategy; and calculates the terminal position according to the positioning signal time difference and / or the signal strength of sending and receiving.

[0030] In a third aspect, a computer storage medium is disclosed, on which a computer program is stored. When the computer program is executed by a processor, an extended mobile communication base station positioning enhancement method as described in any one of the above items is implemented.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides an extended mobile communication base station positioning enhancement method, device, and storage medium, which independently configure uplink / downlink positioning signal resources for each radio remote unit of the extended base station, solves the problem that the signals of multiple radio remote units in the same cell cannot be distinguished and the positioning error is large in the traditional solution, so that the terminal or base station can achieve high-precision positioning based on the independent signals of multiple radio remote units in the same cell. While improving the positioning accuracy, there is no need to increase the baseband processing capability requirements of the cell service channel, and there is no obvious increase in the requirements for the front-end bandwidth of the baseband processing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the working mode of the extended base station;

[0034] Figure 2 A schematic diagram of the connection between the baseband processing unit and the radio frequency unit;

[0035] Figure 3 The figure is a schematic diagram of the networking mode;

[0036] Figure 4 This is a schematic diagram of positioning center distance;

[0037] Figure 5 A schematic diagram of a flow chart of an extended mobile communication base station positioning enhancement method provided by the present invention;

[0038] Figure 6 A schematic diagram of a working mode of an extended base station in an extended mobile communication base station positioning enhancement method provided by the present invention;

[0039] Figure 7 A schematic diagram of downlink positioning signal (SSB) resource configuration in an extended mobile communication base station positioning enhancement method provided by the present invention;

[0040] Figure 8Schematic diagram of downlink positioning signal (DL-PRS) resource reservation in an extended mobile communication base station positioning enhancement method provided by the present invention;

[0041] Figure 9 Schematic diagram of uplink positioning signal resource occupancy in an extended mobile communication base station positioning enhancement method provided by the present invention. Specific embodiments

[0042] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] The terms "including" and "having" in the embodiments of the present invention and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or modules does not necessarily have to be limited to those clearly listed steps or modules, but may include other steps or modules not clearly listed or inherent to these processes, methods, products, or devices.

[0044] In order to reduce the networking cost of mobile communication base stations, an extended base station method is often adopted. For example, Figure 1 As shown, a single-cell baseband processing unit supporting M antennas in a radio cell uses an extended unit (EU or also known as RHub) to connect N radio remote units (RRUs) supporting M antennas at the same time. Multiple radio remote units RRU only expand the coverage range and do not increase the number of antennas for cell baseband processing, which can reduce costs. The downlink module 1 of the extended unit represents a part of the baseband processing function, and its output is the time-domain or frequency-domain data of each antenna in the cell. The baseband processing function in the downlink module 1 is not limited in this application, and this application is not limited by the function of the extended unit. Similarly, the uplink module 1 is similar, and its specific function is not related to the present invention.

[0045] The extended unit EU can be in the form of a separate device or a functional unit inside the radio remote unit RRU. For example, Figure 2 As shown, each radio remote unit RRU in a cell can be in a cascaded form, and the function of the extended unit can be implemented inside the first-stage radio remote unit RRU, and the logical function is Figure 1 the same.

[0046] For example, Figure 1As shown, an extended base station includes a baseband processing unit, an extension unit, a remote radio unit, and an antenna. Currently, when using an extended base station for positioning, the resource scheduling and baseband processing of the base station's downlink positioning signal, and the baseband processing of the uplink positioning signal only require the baseband processing unit (BBU) to handle. The positioning application initiates a positioning request to the positioning processing module, and the positioning processing module initiates a positioning request to the base station through the network. The positioning request triggers the base station scheduling module to schedule the positioning resources after certain processing, allocate resources for the downlink positioning signal, and send it to the terminal (UE) through the air interface after baseband processing, EU, and remote radio unit (RRU). The UE calculates its position based on the received Figure 1 positioning signals of multiple base stations or cells shown. In the uplink direction, the serving cell scheduling module schedules the UE to send an uplink positioning signal, and multiple base stations or cells can calculate the UE's position only through the uplink positioning signal information after receiving it.

[0047] If the round-trip time (RTT) delay difference between the downlink and uplink positioning signals is utilized simultaneously, a more accurate terminal position can be obtained. In this process, the positioning processing module can receive the downlink positioning information from the terminal and the uplink positioning information from the uplink positioning signal processing units of multiple base stations, and then calculate a more accurate terminal position based on the RTT delay difference of multiple base stations.

[0048] When using an extended base station, multiple remote radio units (RRUs) under a single cell of the base station can only send the same downlink positioning signal. For the uplink, the baseband processing unit (BBU) cannot distinguish the uplink positioning signals sent by each remote radio unit (RRU) of a single cell either. Only different cell remote radio units (RRUs) can be used for positioning, adopting the networking mode as Figure 3 shown.

[0049] As Figure 4 shown, since there are multiple remote radio units (RRUs) in a cell and the coverage range is large, the center distance D1 between adjacent cell centers is relatively large, resulting in a large positioning error. If positioning can be performed between different remote radio units (RRUs) in a cell, the center distance D2 between the coverage ranges of adjacent remote radio units (RRUs) is small, and the positioning error is small. However, since the current extended base station can only process cell-level positioning signals, positioning at the remote radio unit (RRU) level cannot be achieved.

[0050] Based on the above technologies, the present application provides an extended mobile communication base station positioning enhancement method, which significantly improves the positioning accuracy of the terminal by dynamically configuring positioning signal resources, combining downlink or uplink or combined downlink and uplink positioning strategies, and utilizing the independent signal processing capabilities of multiple remote radio units under the same extension unit.

[0051] As Figure 5 shown, this method includes:

[0052] Step S1: According to the positioning enhancement strategy, allocate independent positioning signal resources for multiple remote radio units (RRUs) used to locate the same terminal in the baseband processing unit, and synchronously allocate corresponding positioning signal resources for the terminal; the RRUs include multiple RRUs under the same cell extension unit or multiple RRUs under different cell extension units; the positioning signal resources include downlink positioning signal resources; uplink positioning signal resources; and uplink and downlink positioning signal resources.

[0053] The positioning enhancement strategy includes configuring downlink positioning signal resources and / or configuring uplink positioning signal resources. When configuring downlink positioning signal resources, as Figure 6 shown, allocate independent downlink positioning signal resources for each RRU or antenna through the baseband processing unit (BBU). That is, after the downlink replication unit or after the downlink replication unit of the extension unit, insert independent downlink positioning signals for the RRU or each transmission channel of the RRU, and synchronously send the corresponding positioning signal resource information to the terminal.

[0054] The multiple RRUs can be multiple RRUs under the same cell extension unit or multiple RRUs under different cell extension units, as long as they can locate one terminal simultaneously. In some embodiments, the multiple RRUs can be located under the same cell extension unit within a cell, such as multiple RRUs under the extension unit in cell A jointly locating the same terminal. It can be understood that there is one extension unit inside a cell, but the extension unit is not limited to one physical device, and the extension unit can be set on multiple physical devices. That is to say, the multiple RRUs can be respectively set on multiple physical devices.

[0055] Alternatively, the RRUs can also be located under different extension units across cells. For example, along a high-speed railway, the terminal is jointly located by the RRUs under the respective extension units of adjacent cells A and B to achieve continuous tracking. Each RRU participating in the positioning is configured with independent positioning signal resources.

[0056] The downlink positioning signal includes at least one of the following: an independent beam identifier configured through the SSB signal, a downlink positioning reference signal based on reserved time-frequency resources. Taking 5G as an example, the positioning signal can be an SSB signal (SSB Index is obtained from the DM-RS of PBCH) with different BeamIDs (corresponding to SSB Index) inserted, as Figure 7As shown in the figure, taking 4 radio remote units (RRUs) in a cell as an example, multiple SSB resources can be configured in the baseband processing unit (BBU) within one SSB period. In the replication unit of the EU, each RRU only retains one SSB, and the other SSB positions remain idle without emitting signals. Each SSB is bound to a unique beam ID (Beam ID), and different SSBs are allocated to different RRUs through the downlink replication unit of the expansion unit. The SSB resource configuration method is clearly defined in relevant standard protocols. For example, RRU1 sends SSB Index = 1, and RRU2 sends SSB Index = 2.

[0057] In another implementation, a separate downlink positioning reference signal (DL-PRS) based on reserved time-frequency resources can also be inserted for each RRU in the downlink replication unit. As Figure 8 shown in the figure, independent DL-PRS resource blocks are reserved for each RRU in the time-frequency resource grid of the BBU. The expansion unit maps the DL-PRS of each RRU to the corresponding position. In this scenario, resource positions need to be reserved for each RRU in the BBU. Figure 7 This is only a schematic diagram, and the positioning signal resource configuration method can refer to relevant standard protocols.

[0058] When configuring the uplink positioning signal resources, uplink positioning signal resources are configured for the terminal, and independent uplink positioning signal resources are allocated for each RRU or each receiving channel of the RRU by the base station BBU. That is, before the uplink weighted combining unit of the expansion unit, the uplink positioning signals received by each RRU or each receiving channel of the RRU are extracted. Before the uplink weighted combining unit of the expansion unit, the sounding reference signal (SRS) of the terminal or the dedicated uplink positioning reference signal (UL-PRS) signal of the terminal received by each RRU or each receiving channel of the RRU is extracted through parallel processing channels. For example, the SRS signals of RRU1 and RRU2 are transmitted to the positioning processing module through channels 1 and 2 respectively. Configuring the downlink positioning signal resources and the uplink positioning signal resources, that is, the uplink and downlink joint positioning enhancement, is to allocate independent downlink and uplink positioning resources for each RRU simultaneously.

[0059] In some embodiments, the positioning enhancement strategy can be dynamically selected according to network requirements or high-layer instructions to meet the requirements of the application scenario and improve the positioning accuracy. For example, the uplink and downlink joint positioning enhancement mode is selected in scenarios with high positioning accuracy requirements, and the downlink positioning enhancement mode is selected in wide coverage scenarios.

[0060] Step S2: Based on the positioning enhancement strategy, obtain the time difference of positioning signals and / or the signal strength of transmitting and receiving positioning signals;

[0061] The extended base station sends or receives the positioning signal of the terminal, and obtains the corresponding time difference of positioning signals and / or the signal strength of transmitting and receiving positioning signals.

[0062] When the positioning enhancement strategy is to configure downlink positioning signal resources, obtain the time difference of multiple downlink positioning signals arriving at the terminal and / or the signal strength of transmitting and receiving; the terminal receives the downlink positioning signals of multiple remote radio units, which can be independent beam identifiers configured by SSB signals and downlink positioning reference signals based on reserved time-frequency resources, measure the time difference of arrival (TDOA) of each signal and / or the signal strength of transmitting and receiving, and report it to this extended base station.

[0063] When the positioning enhancement strategy is to configure uplink positioning signal resources, obtain the time difference of multiple uplink positioning signals arriving at multiple remote radio units and / or the signal strength of transmitting and receiving; multiple remote radio units receive the SRS or UL-PRS signals of the terminal, measure the time difference of arrival (TDOA) of the signals and / or the signal strength of transmitting and receiving, and transmit it to the positioning processing module.

[0064] When the positioning enhancement strategy is to configure downlink positioning signal resources and uplink positioning signal resources simultaneously, obtain the round-trip time difference of multiple downlink positioning signals and uplink positioning signals of the same terminal and / or the signal strength of transmitting and receiving of the uplink and downlink positioning signals; the round-trip time difference is the difference between the round-trip time (RTT) of the downlink positioning signal and the uplink positioning signal of multiple remote radio units. The extension unit synchronizes the downlink signal transmission time T1 and the uplink signal reception time T2 of each remote radio unit. At the same time, receive the downlink signal reception time T3 and the uplink signal transmission time T4 reported by the terminal, the downlink signal transmission time T1 and the uplink signal reception time T2, calculate the round-trip time RTT of the terminal and each remote radio unit, and the round-trip time RTT = (T3 – T1) + (T2 – T4). This calculation method can eliminate the synchronization error between multiple remote radio units and calculate the time difference between the RTT of the terminal and the corresponding multiple remote radio units;

[0065] And / or calculate the downlink path loss according to the signal strength of the downlink positioning signal transmitted by multiple remote radio units and received by the terminal, and calculate the distance between multiple remote radio units and the terminal according to the path loss; and / or calculate the uplink path loss according to the signal strength of the uplink positioning signal transmitted by the terminal and received by multiple remote radio units, and calculate the distance between multiple remote radio units and the terminal according to the path loss.

[0066] Step S3: Calculate the terminal position according to the positioning signal time difference and / or according to the distances between the terminal and multiple remote radio units calculated from the signal strength.

[0067] When the positioning enhancement strategy is to configure the downlink positioning signal resources, according to the TDOA of the downlink positioning signals of multiple remote radio units reported by the terminal, the DL-TOA method of multi-point time delay difference positioning can be used to locate the terminal, or locate according to the field strength of the positioning signals received at different RRU points, and solve the specific position of the terminal.

[0068] When the positioning enhancement strategy is to configure the uplink positioning signal resources, such as using the SRS signal of the terminal or the dedicated uplink positioning signal UL-PRS, etc. The uplink positioning signals received by multiple remote radio units RRU are sent to the "uplink positioning signal processing" unit before "uplink weighted combination". The uplink positioning signals received by multiple remote radio units RRU in one cell can be processed separately. The UL-TOA-based positioning is realized by using multiple remote radio units RRU, and / or the specific position of the terminal is solved according to the signal strength of the uplink positioning and sending and receiving between the terminal and multiple remote radio units. The resource occupancy situation of the uplink positioning signal after "uplink weighted combination" of the UE, multiple remote radio units RRU, and multiple remote radio units RRU is as Figure 9 shown, and the occupied resource positions are the same.

[0069] When the positioning enhancement strategy is to configure both downlink positioning signal resources and uplink positioning signal resources, obtain the round-trip time difference of multiple uplink and downlink positioning signals, and calculate the terminal position according to the round-trip time difference of the uplink and downlink positioning signals, including:

[0070] Synchronize the uplink and downlink positioning signal transmission and reception timestamps of multiple remote radio units RRU;

[0071] Calculate the round-trip time difference of the uplink and downlink positioning signals between the terminal and each remote radio unit, that is, the difference in RTT between multiple remote radio units and the terminal;

[0072] Based on the round-trip time difference of the uplink and downlink positioning signals of multiple remote radio units, output the terminal position through the multi-cell round-trip time positioning algorithm;

[0073] And / or, calculate the terminal position according to the signal strength of the transmission and reception of the uplink and downlink positioning signals, including:

[0074] Calculate the downlink path loss according to the signal strength of the downlink positioning signal sent by multiple remote radio units and the signal strength received by the terminal, and calculate the distances between multiple remote radio units and the terminal according to the downlink path loss;

[0075] And / or, calculate the uplink path loss based on the signal strength of the uplink positioning signal sent by the terminal and the signal strength received by the multi-radio remote unit, and calculate the distance between the multi-radio remote unit and the terminal according to the uplink path loss;

[0076] Take the average value of the distances calculated based on the uplink and downlink positioning signal strengths as the distance between the multi-radio remote unit and the terminal; calculate the terminal position according to the distance between the multi-radio remote unit and the terminal calculated based on the downlink or uplink or both uplink and downlink.

[0077] Based on the positioning of the signal transmission and reception signal strengths between the multi-radio remote unit and the terminal, according to the difference in the distances between the multi-radio remote unit and the terminal calculated based on the uplink path loss and the downlink path loss, convert the difference in distance into a difference in time. The principle is the same as that of the multi-cell round-trip time positioning algorithm to output the terminal position.

[0078] Utilize the information of the round-trip of the uplink and downlink positioning signals to perform the multi-cell round-trip time positioning algorithm Multi-RTT positioning to improve the positioning accuracy. The multi-cell round-trip time positioning algorithm Multi-RTT has higher positioning accuracy because it eliminates the influence of the synchronization error of different radio remote units RRU. The specific positioning algorithm can be determined based on the actual situation and the specification of the upper layer, and is not limited in this application.

[0079] Based on the same inventive concept, this application also provides an extended mobile communication base station positioning enhancement device, including:

[0080] A policy configuration module that determines a positioning enhancement policy, allocates independent positioning signal resources for multiple radio remote units for positioning the same terminal, and synchronously allocates corresponding positioning signal resources for the terminal; the radio remote units include multiple radio remote units under the same cell extension unit or multiple radio remote units under different cell extension units;

[0081] A signal processing module configured in the downlink and / or uplink of the extension unit, generates and inserts an independent downlink positioning signal, and extracts and separates an independent uplink positioning signal;

[0082] A positioning processing module, based on the positioning enhancement policy, obtains the time difference of the positioning signal and / or the signal strength of transmission and reception between the multiple radio remote units and the terminal; calculates the terminal position according to the time difference of the positioning signal and / or the signal strength of transmission and reception.

[0083] The present invention realizes independent positioning signal processing at the RRU level through an expansion unit: in the downlink direction, the baseband processing unit configures independent positioning signal resources for each RRU, and inserts a differential signal after the downlink replication unit of the expansion unit, enabling the terminal to identify the positioning signals of different RRUs; in the uplink direction, the expansion unit extracts the uplink positioning signals independently received by each RRU before uplink weighted combination, avoiding signal mixing. This mechanism supports dynamic switching among three positioning modes - only downlink, only uplink, or combined downlink and uplink. For example, in a complex indoor environment, the Multi-RTT mode can synchronize the transceiver timestamps of multiple RRUs, eliminate synchronization errors by calculating the round-trip time differences between the terminal and each RRU, and achieve a positioning accuracy of up to 1.5 meters, which is more than 80% higher than traditional methods.

[0084] The implementation process of the present invention deeply integrates with existing standards at the hardware and protocol levels. Taking the 5G network as an example, the downlink positioning signal can reuse the SSB beam or the DL-PRS resources defined in 3GPP R16, and is dynamically mapped to different RRUs through the expansion unit; the uplink signal is based on the SRS or UL-PRS configuration of the terminal, and is separated by the expansion unit and then transmitted to the positioning engine. The resource allocation only occupies a small part of the air interface time-frequency resources, and the increase in the demand for baseband processing capabilities and fronthaul bandwidth is limited, maintaining the low-cost advantage of the extended base station while ensuring accuracy. In practical applications, this solution can adapt to the requirements of multiple scenarios: in indoor-outdoor mixed areas such as high-speed railway stations, cross-cell RRU collaborative positioning can interact resource allocation information through the Xn interface, jointly solve the terminal position, and achieve seamless navigation; in the industrial Internet of Things scenario, RRU-level high-precision positioning can support millimeter-level trajectory control of AGV cars, highlighting the universality of the technology. Through the collaborative optimization of underlying signal processing innovation and upper-layer positioning algorithms, the present invention endows the extended base station with high-precision positioning capabilities, filling the technical gap between low-cost networking and precise location services.

[0085] Based on the same inventive concept, the present invention also provides a computer device, including: a processor and a memory; wherein, the memory stores a computer program, and the computer program is adapted to be loaded and executed by the processor to perform the steps of an extended mobile communication base station positioning enhancement method as described above.

[0086] The processing method of the computer device can refer to the description of the above method, and will not be elaborated here.

[0087] The embodiment of the present application also provides a non-transitory machine-readable storage medium, on which an executable program is stored. When the executable program runs on a microprocessor, it causes the processor to execute the method provided in the above embodiment.

[0088] An embodiment of the present invention discloses a computer-readable storage medium that stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the described method.

[0089] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the described method.

[0090] The above-described embodiments are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative efforts.

[0091] Through the above specific descriptions of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, and the storage medium includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other computer-readable medium capable of carrying or storing data.

[0092] Finally, it should be noted that: What is disclosed in the embodiments of the present invention is only the preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An extended mobile communication base station positioning enhancement method, characterized in that Including: According to the positioning enhancement strategy, independent positioning signal resources are allocated to multiple remote radio units (RRUs) for positioning the same terminal in the baseband processing unit, and corresponding positioning signal resources are synchronously allocated to the terminal; the RRUs include multiple RRUs under the same cell extension unit or multiple RRUs under different cell extension units; the positioning signal resources include downlink positioning signal resources; uplink positioning signal resources; uplink and downlink positioning signal resources. Based on the positioning enhancement strategy, the time difference of arrival (TDOA) and / or the signal strength of transmission and reception between multiple RRUs and the terminal are obtained. The terminal position is calculated according to the TDOA and / or the signal strength of transmission and reception.

2. The enhanced method for positioning an extended mobile communication base station according to claim 1, wherein The positioning enhancement strategy includes: configuring downlink positioning signal resources and / or configuring uplink positioning signal resources.

3. An enhanced method for positioning an extended mobile communication base station according to claim 2, characterized in that The configuration of downlink positioning signal resources includes: inserting independent downlink positioning signals for the RRUs or each transmission channel of the RRUs after or in the downlink replication unit of the extension unit, and synchronously sending the corresponding positioning signal resource information to the terminal.

4. An enhanced method for positioning an extended mobile communication base station according to claim 3, characterized in that, The downlink positioning signal includes at least one of the following: an independent beam identifier configured through the SSB signal, a downlink positioning reference signal based on reserved time-frequency resources.

5. An extended mobile communication base station positioning enhancement method according to claim 2, characterized in that, The configuration of uplink positioning signal resources includes: configuring uplink positioning signal resources for the terminal, and extracting the uplink positioning signals received by each RRU or each reception channel of the RRU before the uplink weighted combining unit of the extension unit.

6. An enhanced method for positioning an extended mobile communication base station according to claim 5, characterized in that, The uplink positioning signal includes at least one of the following: the sounding reference signal of the terminal, the dedicated uplink positioning reference signal of the terminal.

7. An extended mobile communication base station positioning enhancement method according to claim 4 or 6, characterized in that Based on the positioning enhancement strategy, obtaining the TDOA and / or the signal strength of transmission and reception includes: When the positioning enhancement strategy is to configure downlink positioning signal resources, obtaining the TDOA and / or the signal strength of transmission and reception of multiple downlink positioning signals arriving at the terminal. When the positioning enhancement strategy is to configure uplink positioning signal resources, obtaining the TDOA and / or the signal strength of transmission and reception of the uplink positioning signals arriving at multiple RRUs. When the positioning enhancement strategy is to simultaneously configure downlink positioning signal resources and uplink positioning signal resources, obtaining the round-trip time difference of multiple downlink positioning signals and uplink positioning signals of the same terminal and / or the signal strength of transmission and reception of the uplink and downlink positioning signals; the round-trip time difference is the difference between the round-trip time (RTT) of the downlink positioning signal and the uplink positioning signal of multiple RRUs.

8. An enhanced method for positioning an extended mobile communication base station according to claim 7, characterized in that, When the positioning enhancement strategy is to simultaneously configure downlink positioning signal resources and uplink positioning signal resources, obtaining the round-trip time difference of multiple downlink positioning signals and uplink positioning signals of the same terminal and / or the signal strength of transmission and reception of the uplink and downlink positioning signals, and calculating the terminal position according to the round-trip time difference of the uplink and downlink positioning signals, includes: Synchronizing the transceiver timestamps of the uplink and downlink positioning signals of multiple RRUs and the same terminal. Eliminating the synchronization error between the RRUs, and calculating the round-trip time difference of the uplink and downlink positioning signals between the terminal and each RRU. Based on the round-trip time difference of the uplink and downlink positioning signals of multiple remote radio units, the terminal position is output through the multi-cell round-trip time positioning algorithm; and / or, calculating the terminal position according to the signal strength of the transmission and reception of the uplink and downlink positioning signals, including: Calculating the downlink path loss according to the signal strength of the downlink positioning signal transmitted by the multi-remote radio unit and the signal strength received by the terminal, and calculating the distance between the multiple remote radio units and the terminal according to the downlink path loss; and / or, calculating the uplink path loss according to the signal strength of the uplink positioning signal transmitted by the terminal and the signal strength received by the multi-remote radio unit, and calculating the distance between the multiple remote radio units and the terminal according to the uplink path loss; Taking the average value of the distances calculated according to the uplink and downlink positioning signal strengths as the distance between the multiple remote radio units and the terminal; calculating the terminal position according to the distance between the multiple remote radio units and the terminal calculated by downlink or uplink or uplink and downlink.

9. An extended mobile communication base station positioning enhancement device, characterized in that, Including: A policy configuration module, according to the positioning enhancement policy, allocates independent positioning signal resources for multiple remote radio units used to locate the same terminal in the baseband processing unit, and synchronously allocates corresponding positioning signal resources for the terminal; the remote radio units include multiple remote radio units under the same cell extension unit or multiple remote radio units under different cell extension units; the positioning signal resources include downlink positioning signal resources; uplink positioning signal resources; Uplink and downlink positioning signal resources; A signal processing module, configured on the downlink and / or uplink of the extension unit, generates and inserts independent downlink positioning signals, and extracts and separates independent uplink positioning signals; A positioning processing module, based on the positioning enhancement policy, obtains the positioning signal time difference and / or the signal strength of transmission and reception between the multiple remote radio units and the terminal; calculates the terminal position according to the positioning signal time difference and / or the signal strength of transmission and reception.

10. A computer storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor, it implements an extended mobile communication base station positioning enhancement method according to any one of claims 1-8.

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