Positioning method and device thereof

Abstract

An embodiment of the present application discloses a positioning method applied to a digital indoor system. The positioning method provided in the embodiment of the present application includes: a radio frequency switching unit receives a first message transmitted by one remote radio unit through a first module, a radio frequency switching unit receives a second message transmitted by a second remote radio unit through a second module, a radio frequency switching unit receives a third message transmitted by a third remote radio unit through a third module, and a radio frequency switching unit receives a fourth message transmitted by a fourth remote radio unit through a fourth module. In the embodiment of the present application, positioning signals transmitted by multiple remote radio units are received simultaneously, and the positioning accuracy of the terminal is improved.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202011604406.2, entitled "LOCATING METHOD AND DEVICE THEREOF," filed with the State Intellectual Property Office of China on December 29, 2020, the entire contents of which are incorporated herein by reference.

[0002] Technical Field FIELD OF THE DISCLOSURE The embodiments of the present application relate to the field of communication technologies, and in particular to a locating method and device thereof. [Background technology]

[0003] The indoor digital communication system mainly uses a distributed architecture of the digital indoor system (DIS), which is similar to the LampSite lamp site, and includes a baseband unit (BBU), a central switching unit (RHUB), and a distributed remote radio unit (pRRU).

[0004] In digital indoor systems similar to LampSite, radio frequency combining is usually used for signal processing. The uplink signals of pRRUs are combined by the RHUB and then arrive at the BBU. As a result, the BBU cannot distinguish between the signal measurements of a single pRRU. In the prior art, in the polling measurement scheme, the pRRUs can individually measure the uplink signals of users at different moments and send the uplink signals to the RHUB for combining. In this way, the measurements of all pRRUs corresponding to a RHUB can be completed after a certain period of time.

[0005] Since only one pRRU performs measurement at each polling instant, the locating signals received by the pRRUs are signals transmitted by the terminal at different instants. The longer the interval at which the terminal transmits the positioning signal, the longer the time interval for measuring the signal. If the terminal moves within this period, the final positioning accuracy will not be high enough. Summary of the Invention

[0006] The embodiments of the present application provide a positioning method that enables messages transmitted by multiple remote radio units and used to position a terminal to be received simultaneously, thus reducing the time for receiving different positioning signals and improving the positioning accuracy of the terminal.

[0007] A first aspect of an embodiment of the present application provides a positioning method, including:

[0008] The radio frequency switching unit receives, via a first switching module, a first message transmitted by a first remote radio unit via a first module, where the first module is a transmitting module of the first remote radio unit, the first message is for locating the terminal, and the first switching module is a receiving module of the radio frequency switching unit; the radio frequency switching unit receives, via a second module, a second message transmitted by a second remote radio unit via a second switching module, where the second module is a transmitting module of the second remote radio unit, the second message is for locating the terminal, and the second switching module is a receiving module of the radio frequency switching unit; the radio frequency switching unit receives, via a third module, a second message transmitted by a third remote radio unit via a third module, where the second module is a transmitting module of the second remote radio unit, the second message is for locating the terminal, and the second switching module is a receiving module of the radio frequency switching unit; the radio frequency switching unit receives a fourth message transmitted by the fourth remote radio unit via a fourth module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth message being for locating the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit, where the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit.

[0009] In this embodiment of the present application, the radio frequency switching unit receives the first message, the second message, the third message and the fourth message transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit through different transmission modules, so that the messages for positioning transmitted by multiple remote radio units can be received simultaneously, and the time for receiving the positioning signal is shortened, and therefore the positioning accuracy of the terminal is improved.

[0010] According to the positioning method of the first aspect, in a possible implementation, the first message is a first positioning signal, the second message is a second positioning signal, the third message is a third positioning signal, and the fourth message is a fourth positioning signal, and the method further includes a radio frequency switching unit transmitting the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal to a base station, where the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are used for location solution.

[0011] In this embodiment of the present application, the radio frequency switching unit receives the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit through different transmitting modules, so that the positioning signals transmitted by multiple remote radio units can be received simultaneously, and the time for receiving the positioning signals is shortened, and therefore the positioning accuracy of the terminal is improved.

[0012] Based on the positioning method in the first aspect, in a possible implementation, the first message is first solution information, the second message is second solution information, the third message is third solution information, and the fourth message is fourth solution information, and the method further includes:

[0013] The radio frequency switching unit transmits first solution information, second solution information, third solution information and fourth solution information to the base station, where the first solution information is obtained by a first remote radio unit performing location solving based on the first positioning signal, and the second solution information is obtained by a second remote radio unit performing location solving based on the second positioning signal. Location and performing a solution on the third remote radio unit based on the third positioning signal, the third solution information being obtained by performing a solution on the third remote radio unit based on the third positioning signal. Location and performing a solution on the fourth remote radio unit based on the fourth positioning signal, the fourth solution information being obtained by performing a solution on the fourth remote radio unit based on the fourth positioning signal. Location The solution is obtained by performing a first positioning signal transmitted by the terminal to a first remote radio unit, a second positioning signal transmitted by the terminal to a second remote radio unit, a third positioning signal transmitted by the terminal to a third remote radio unit, and a fourth positioning signal transmitted by the terminal to a fourth remote radio unit.

[0014] In this embodiment of the present application, the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are resolved in the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit to avoid the impact of intermediate link processing (such as sub-band splicing, CPRI, radio frequency combination, etc.) on delay performance. In addition, the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are respectively resolved by four remote radio units, so that the resolution ability in unit time is improved.

[0015] A second aspect of the present application provides a positioning method, comprising:

[0016] A first remote radio unit receives a first positioning signal transmitted by the terminal via a first receiving module; A first remote radio unit performs a time-of-arrival TOA measurement based on the first positioning signal to obtain first solution information, and the first remote radio unit transmits the first solution information to a radio frequency switching unit.

[0017] In this embodiment of the present application, the first solution information is obtained by using the first positioning signal, and the solution server does not need to perform the solution, which can reduce the resources of the solution server.

[0018] Based on the positioning method in the second aspect of the present application, in a possible implementation, the method further includes: a first remote radio unit receives a first air interface synchronization correction message sent by the radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to the second remote radio unit, where the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, where the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; and the first remote radio unit sends the first synchronization signal to the second remote radio unit based on the air interface synchronization correction message.

[0019] In this embodiment of the present application, the first air interface synchronization correction message is sent, so that the air interface synchronization correction can be performed between remote wireless units, and the base station side does not need to send a reference beacon, thus reducing the signaling overhead of the base station.

[0020] Based on the positioning method in the second aspect of the present application, in a possible implementation, the method further includes: a first remote radio unit receives a second air interface synchronization correction message sent by a radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; the first remote radio unit receives the second synchronization signal sent by the third remote radio unit based on the second air interface synchronization correction message; remote The wireless unit performs calculation based on the second synchronization signal to obtain a second time difference of arrival TDOA, where the second time difference of arrival TDOA is for performing air interface synchronization compensation in the first remote wireless unit; remote The radio unit transmits a second time difference of arrival TDOA to the radio frequency switching unit.

[0021] In this embodiment of the present application, since the second air interface synchronization correction message is received, the air interface synchronization correction can be performed between the remote radio units, and the base station does not need to send a reference beacon, thus reducing the signaling overhead of the base station.

[0022] A third aspect of the present application provides a positioning method, comprising:

[0023] A first remote radio unit receives a first air interface synchronization correction message sent by the radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to a second remote radio unit, where the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, where the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; and the first remote radio unit sends the first synchronization signal to the second remote radio unit based on the air interface synchronization correction message.

[0024] In this embodiment of the present application, the first air interface synchronization correction message is sent, so that the air interface synchronization correction can be performed between remote wireless units, and there is no need for the base station to send a reference beacon, thus reducing the signaling overhead of the base station.

[0025] According to the positioning method in the third aspect of the present application, in a possible implementation, a first remote radio unit receives a second air interface synchronization correction message sent by a radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; the first remote radio unit receives the second synchronization signal sent by the third remote radio unit according to the second air interface synchronization correction message; remote The wireless unit performs calculation based on the second synchronization signal to obtain a second time difference of arrival TDOA, where the second time difference of arrival TDOA is for performing air interface synchronization compensation in the first remote wireless unit; remote The radio unit transmits a second time difference of arrival TDOA to the radio frequency switching unit.

[0026] In this embodiment of the present application, since the second air interface synchronization correction message is received, the air interface synchronization correction can be performed between the remote radio units, and there is no need for the base station to send a reference beacon, thus reducing the signaling overhead of the base station.

[0027] A fourth aspect of the present application provides a radio frequency switching unit.

[0028] The radio frequency switching unit is a receiving unit configured to receive, via a first switching module, a first message transmitted by a first remote radio unit via a first module, where the first module is a transmitting module of the first remote radio unit, the first message is for locating the terminal, and the first switching module is a receiving module of a radio frequency switching unit; The receiving unit is further configured to receive, via the second switching module, a second message transmitted by a second remote radio unit via a second module, where the second module is a transmitting module of the second remote radio unit, the second message is for locating the terminal, and the second switching module is a receiving module of the radio frequency switching unit; The receiving unit is further configured to receive, via a third switching module, a third message transmitted by a third remote radio unit via a third module, where the third module is a transmitting module of the third remote radio unit, the third message is for locating the terminal, and the third switching module is a receiving module of the radio frequency switching unit; The receiving unit is further configured to receive, via a fourth switching module, a fourth message transmitted by a fourth remote radio unit via a fourth module, the fourth module being a transmitting module of the fourth remote radio unit; message is for positioning the terminal, and the fourth switching module is a receiving module of a radio frequency switching unit; The first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of a radio frequency switching unit.

[0029] Based on the radio frequency switching unit in the fourth aspect, in a possible implementation, the first message is a first positioning signal, the second message is a second positioning signal, the third message is a third positioning signal, and the fourth message is a fourth positioning signal, and the radio frequency switching unit: The wireless communication system further includes a transmitting unit configured to transmit the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to a base station, where the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are used for location resolution.

[0030] Based on the radio frequency switching unit in the fourth aspect, in a possible implementation, the first message is first solution information, the second message is second solution information, the third message is third solution information, and the fourth message is fourth solution information, and the transmitting unit is further configured to transmit the first solution information, the second solution information, the third solution information, and the fourth solution information to the base station, where the first solution information is obtained by performing location resolution based on the first positioning signal by the first remote radio unit, and the second solution information is obtained by performing location resolution based on the second positioning signal by the second remote radio unit. Location and performing a solution on the third remote radio unit based on the third positioning signal, the third solution information being obtained by performing a solution on the third remote radio unit based on the third positioning signal. Location and performing a solution on the fourth remote radio unit based on the fourth positioning signal, the fourth solution information being obtained by performing a solution on the fourth remote radio unit based on the fourth positioning signal. Location The solution is obtained by performing a solution, where a first positioning signal is transmitted by the terminal to a first remote radio unit, a second positioning signal is transmitted by the terminal to a second remote radio unit, a third positioning signal is transmitted by the terminal to a third remote radio unit, and a fourth positioning signal is transmitted by the terminal to a fourth remote radio unit.

[0031] The method performed by each unit of the radio frequency switching unit provided in the fourth aspect of the present application is similar to the method performed by the radio frequency switching unit in the first to third aspects, and the details will not be described again here.

[0032] A fifth aspect of the present application provides a remote radio unit.

[0033] The remote radio unit is a receiving unit configured to receive a first positioning signal transmitted by the terminal via a first receiving module; a processing unit configured to perform a time of arrival TOA measurement based on the first positioning signal to obtain first solution information; a sending unit configured to send the first solution information to the radio frequency switching unit; Includes.

[0034] Based on the remote radio unit in the fifth aspect, in a possible implementation, the receiving unit is further configured to receive a first air interface synchronization correction message sent by the radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to the second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; The transmitting unit is further configured to transmit a first synchronization signal to the second remote radio unit based on an air interface synchronization correction message.

[0035] Based on the remote radio unit in the fifth aspect, in a possible implementation, the receiving unit is specifically configured to receive a second air interface synchronization correction message transmitted by the radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal transmitted by a third remote radio unit; The receiving unit is further configured to receive a second synchronization signal transmitted by a third remote radio unit based on the second air interface synchronization correction message; The processing unit is further configured to perform calculations based on the second synchronization signal to obtain a second time difference of arrival TDOA, the second time difference of arrival TDOA being for performing air interface synchronization compensation at the first remote radio unit; The sending unit is further configured to send the second time difference of arrival TDOA to the radio frequency switching unit.

[0036] The method performed by each unit of the remote radio unit provided in the fifth aspect of the present application is similar to the method performed by the first remote radio unit in the first to third aspects, and the details will not be described again here.

[0037] A sixth aspect of the present application provides a remote radio unit.

[0038] The remote radio unit is a receiving unit configured to receive a first air interface synchronization correction message sent by a radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to a second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; and a transmitting unit configured to transmit a first synchronization signal to a second remote radio unit based on the air interface synchronization correction message; Includes.

[0039] Based on the remote radio unit in the sixth aspect, in a possible implementation, the receiving unit is further configured to receive a second air interface synchronization correction message transmitted by the radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal transmitted by a third remote radio unit; The receiving unit is further configured to receive a second synchronization signal transmitted by a third remote radio unit based on the second air interface synchronization correction message; The remote radio unit is and a processing unit configured to perform calculations based on the second synchronization signal to obtain a second time difference of arrival TDOA, where the second time difference of arrival TDOA is for performing air interface synchronization compensation at the first remote radio unit; The sending unit is further configured to send the second time difference of arrival TDOA to the radio frequency switching unit.

[0040] The method performed by each unit of the remote radio unit provided in the sixth aspect of the present application is similar to the method performed by the first remote radio unit in the first to third aspects, and the details will not be described again here.

[0041] A seventh aspect of the present application provides a computer storage medium having instructions stored thereon that, when executed, enable a computer to perform a method in accordance with the first to third aspects of the present application.

[0042] An eighth aspect of the present application provides a computer program product, which, when executed on a computer, enables the computer to carry out the methods in the implementation of the first to third aspects of the present application. Effect of the Invention

[0043] According to the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0044] In the embodiment of the present application, the radio frequency switching unit receives the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit through different transmitting modules, so that the positioning signals transmitted by multiple remote radio units can be received simultaneously, and the time for receiving the positioning signals is shortened, and therefore the positioning accuracy of the terminal is improved. [Brief description of the drawings]

[0045] [Figure 1] FIG. 1 is a system architecture diagram of a data transmission system according to an embodiment of the present application.

[0046] [Diagram 2] 1 is a schematic flow chart of a positioning method according to an embodiment of the present application;

[0047] [Diagram 3] 4 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0048] [Figure 4] 4 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0049] [Diagram 5] 4 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0050] [Figure 6] 4 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0051] [Figure 7] 4 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0052] [Figure 8] 1 is a schematic structural diagram of a radio frequency switching unit according to an embodiment of the present invention;

[0053] [Figure 9] FIG. 2 is another schematic structural diagram of a radio frequency switching unit according to an embodiment of the present invention;

[0054] [Figure 10] 1 is a schematic structural diagram of a remote radio unit according to an embodiment of the present invention;

[0055] [Figure 11] FIG. 2 is another schematic structural diagram of a remote radio unit according to an embodiment of the present invention;

[0056] [Figure 12] FIG. 2 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application;

[0057] [Figure 13] FIG. 2 is another schematic structural diagram of a radio frequency switching unit according to an embodiment of the present invention;

[0058] [Figure 14] FIG. 2 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0059] The embodiment of the present application provides a positioning method that enables simultaneous reception of positioning signals transmitted by multiple remote radio units, thus shortening the time for receiving the positioning signals and improving the positioning accuracy of the terminal.

[0060] The following describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It is clear that the described embodiments are only a part, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0061] FIG. 1 is a system architecture diagram of a data transmission system according to an embodiment of the present application.

[0062] As shown in Fig. 1, the data transmission system provided in this embodiment of the present application includes a core network 101, a solution server 102, a baseband unit 103, a radio frequency switching unit 104, a remote radio unit 105 and a terminal 106. One solution server 102 may correspond to one baseband unit 103, multiple solution servers 102 may correspond to one baseband unit 103, or one solution server 102 may correspond to multiple baseband units 103. This is not particularly limited in this specification. In this embodiment of the present application, multiple remote radio units 105 may locate one terminal 106. For example, four remote radio units 105 locate one terminal, six remote radio units 105 locate one terminal, or two remote radio units locate one terminal. This is not particularly limited in this specification.

[0063] The core network 101 and the baseband unit 103 are connected via a network cable such as an optical fiber connection or cat6a. The baseband unit 103 and the solution server 102 may be connected via a network cable such as an optical fiber connection or cat6a, or by using an air interface protocol. The baseband unit 103 and the radio frequency switching unit 104 are connected via a network cable such as an optical fiber connection or cat6a. The radio frequency switching unit 104 and the remote radio unit 105 are connected via a network cable such as an optical fiber connection or cat6a. The remote radio unit 105 is connected to the terminal 106 by using an air interface protocol.

[0064] It should be noted that the solution server 102 may be behind the core network 101, may be within the core network 101, or may be directly connected to the baseband unit 103. This is not particularly limited in this specification.

[0065] The baseband unit 103 may be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, or a base station in another future mobile communication system, which is not particularly limited in the embodiment of the present application.

[0066] The terminal 106 may be an entity configured to receive or transmit a signal, such as a mobile phone. The terminal 106 may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal 106 may be a vehicle with a communication function, an intelligent vehicle, a mobile phone, a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote surgery (remote medical surgery), a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The specific technology and device form used by the terminal are not limited in this embodiment of the present application.

[0067] In the data transmission system provided in this embodiment of the present application, the radio frequency switching unit 104 and the remote radio units 105 form a digital indoor system (DIS). In the method of locating a terminal by using the digital indoor system, information such as RSSI, TOA, TDOA, AOA between the terminal and multiple remote radio units 105 can be measured, and the position of the measurement object is obtained based on geometric characteristics such as a circular relationship, a hyperbolic relationship or a triangular relationship.

[0068] In the existing digital indoor system, radio frequency combining is usually used for signal processing, specifically, the uplink signal of the remote radio unit 105 is combined by the radio frequency switching unit 104 to reach the baseband unit 103. However, in this case, the measurement signal of a single remote radio unit cannot be distinguished. To distinguish the measurement signal of a single remote radio unit, in the prior art, the remote radio unit 105 can measure the uplink signal of the terminal 106 at different moments separately in a polling measurement manner. In other words, the baseband unit 103 only receives the measurement signal of one remote radio unit 105 at the same time. In this way, the measurement signals of multiple remote radio units 105 can be received for the same terminal 106 after multiple moments, so that a location solution is implemented in the terminal 106.

[0069] However, since only one remote radio unit 105 measurement signal can be received at each moment, the measurement signals received by the remote radio unit are also signals from the terminal 106 at different moments. The longer the period of signal transmission by the terminal 106, the longer the time interval of the measurement signal of the remote radio unit 105, and the larger the channel variation during this period may be. As a result, the positioning accuracy of the terminal 106 will ultimately be lower.

[0070] The embodiment of the present application provides a positioning method for improving the positioning accuracy of a terminal. The following describes the positioning method provided in the present application in detail.

[0071] In the embodiment of the present application, four remote radio units are used as an example for explanation. In the embodiment of the present application, an example in which the base station is a baseband unit is used for explanation.

[0072] In an embodiment of the present application, the positioning signal may be sent to a solution server to solve the positioning signal, and the positioning signal may be solved in the remote radio unit and then sent to the base station side for terminal position estimation. Therefore, a separate description is provided below.

[0073] 1. Send the positioning signal to a solution server to resolve the positioning signal.

[0074] FIG. 2 is a schematic flow chart of a positioning method according to an embodiment of the present application.

[0075] Step 201: The terminal transmits a first positioning signal to a first remote radio unit.

[0076] When the base station needs to locate the terminal or when the terminal needs to be located, the terminal transmits a first location signal to a first remote radio unit, where the first location signal is for locating the terminal.

[0077] Specifically, when a terminal needs to perform positioning in a digital indoor system, for example, when the terminal enters a new cell and needs to perform random access, or when the terminal is already connected to a cell and needs to perform positioning update, the terminal transmits a positioning signal to a remote radio unit in the digital indoor system by using an air interface protocol. In this case, the remote radio units located at different positions sequentially receive the positioning signals transmitted by the terminal. Specifically, the first remote radio unit receives the first positioning signal transmitted by the terminal. It should be noted that in this embodiment, the position of the first remote radio unit relative to the terminal is not limited.

[0078] Step 202: The terminal transmits a second positioning signal to a second remote radio unit.

[0079] The terminal transmits a second location signal to a second remote radio unit, where the second location signal is for locating the terminal.

[0080] It should be noted that the second remote radio unit and the first remote radio unit both belong to the same digital indoor system, where the position of the second remote radio unit relative to the terminal is different from the position of the first remote radio unit relative to the terminal, i.e., the second positioning signal received by the second remote radio unit is also different from the first positioning signal. In addition, the order of the moment when the first remote radio unit receives the first positioning signal and the moment when the second remote radio unit receives the second positioning signal is not limited in this embodiment.

[0081] Step 203: The terminal transmits a third positioning signal to a third remote radio unit.

[0082] The terminal transmits a third location signal to a third remote radio unit, where the third location signal is for locating the terminal.

[0083] Step 204: The terminal transmits a fourth positioning signal to a fourth remote radio unit.

[0084] The terminal transmits a fourth location signal to a fourth remote radio unit, where the fourth location signal is for locating the terminal.

[0085] In this embodiment, the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit receive the positioning signal transmitted by the terminal at different positions. Specifically, the first remote radio unit receives the first positioning signal, the second remote radio unit receives the second positioning signal, the third remote radio unit receives the third positioning signal, and the fourth remote radio unit receives the fourth positioning signal, where the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit may receive the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal at the same time or at different times. However, the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are positioning signals transmitted by the terminal at the same moment, but the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit receive the positioning signals at different positions or at different times. Therefore, the remote radio units are distinguished separately. That is, the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are transmitted to the terminal at the same instant.

[0086] Step 205: The first remote radio unit transmits a first positioning signal to the radio frequency switching unit.

[0087] The first remote radio unit transmits a first positioning signal to the radio frequency switching unit via the first module.

[0088] In the communication system, the remote radio unit is usually a multiple-input multiple-output (nTnR), specifically, one remote radio unit has multiple receiving modules and multiple transmitting modules, for example, 4T4R, i.e., four receiving modules and four transmitting modules, or 6T6R, i.e., six receiving modules and six transmitting modules. In this embodiment, the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit are all 4T4R remote radio units. In practical application, the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit may alternatively be 6T6R remote radio units or other types of remote radio units. This is not particularly limited in this specification.

[0089] During radio frequency binding, only data transmitted by the same transmission module of all remote radio units is combined, and different transmission modules are still independent. Therefore, in this embodiment, each remote radio unit is set to hold only one module's data, specifically, only one transmission module is used to transmit data in one remote radio unit, and different remote radio units hold different transmission modules. In this way, after radio frequency binding, the radio frequency switching unit can simultaneously obtain data transmitted by different remote radio units through different transmission modules. Specifically, the first remote radio unit transmits data only in the first module, specifically, the first remote radio unit transmits a first positioning signal to the radio frequency switching unit through the first module. It should be noted that the first positioning signal is located in the parameter part of the data frame transmitted by the first remote radio unit to the radio frequency switching unit.

[0090] Step 206: The second remote radio unit transmits a second positioning signal to the radio frequency switching unit.

[0091] The second remote radio unit transmits a second positioning signal to the radio frequency switching unit via the second module.

[0092] Specifically, the second remote radio unit only retains the second module for transmitting data, specifically, transmits a second positioning signal to the radio frequency switching unit via the second module.

[0093] Step 207: The third remote radio unit sends a third positioning signal to the radio frequency switching unit.

[0094] The third remote radio unit transmits a third positioning signal to the radio frequency switching unit via the third module.

[0095] Specifically, the third remote radio unit only holds the third module to transmit data, specifically, the third remote radio unit transmits a third positioning signal to the radio frequency switching unit through the third module.

[0096] Step 208: The fourth remote radio unit sends a fourth positioning signal to the radio frequency switching unit.

[0097] The fourth remote radio unit transmits a fourth positioning signal to the radio frequency switching unit via the fourth module.

[0098] Specifically, the fourth remote radio unit only holds the fourth module to transmit data, specifically, the fourth remote radio unit transmits a fourth positioning signal to the radio frequency switching unit through the fourth module.

[0099] Step 209: The radio frequency switching unit sends the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the base station.

[0100] After the radio frequency switching unit receives the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit, the radio frequency switching unit transmits the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the base station, and the base station performs corresponding solutions for the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal by using the solution server to calculate the positioning result of the terminal.

[0101] The first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit transmit the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the radio frequency switching unit through different transmission modules, so that the radio frequency switching unit can separately keep the first positioning signal of the first module, the second positioning signal of the second module, the third positioning signal of the third module and the fourth positioning signal of the fourth module during radio frequency coupling. Figure 3 is a schematic diagram of the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit transmitting the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the radio frequency switching unit through different transmission modules. After receiving the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal, the radio frequency switching unit transmits the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the base station separately through the four transmission modules after radio frequency coupling.

[0102] More specifically, as shown in FIG. 4, the first remote radio unit holds the first module to transmit data, and closes the second module, the third module, and the fourth module. The second remote radio unit holds the second module to transmit data, and closes the first module, the third module, and the fourth module. The third remote radio unit holds the third module to transmit data, and closes the first module, the second module, and the fourth module. The fourth remote radio unit holds the fourth module to transmit data, and closes the first module, the second module, and the third module. The first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are transmitted to the base station side after being forwarded by the radio frequency switching unit. This is equivalent to the base station receiving the first positioning signal transmitted from the first remote radio unit through the first module, receiving the second positioning signal transmitted from the second remote radio unit through the second module, receiving the third positioning signal transmitted from the third remote radio unit through the third module, and receiving the fourth positioning signal transmitted from the fourth remote radio unit through the fourth module.

[0103] In the embodiment of the present application, the radio frequency switching unit receives the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit through different transmitting modules, so that the positioning signals transmitted by multiple remote radio units can be received simultaneously, and the period for receiving the positioning signals is shortened, and therefore the positioning accuracy of the terminal is improved.

[0104] 2. Resolving the positioning signal at the remote radio unit.

[0105] FIG. 5 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0106] Step 301: The terminal transmits a first positioning signal to a first remote radio unit.

[0107] Step 302: The terminal transmits a second positioning signal to a second remote radio unit.

[0108] Step 303: The terminal transmits a third positioning signal to a third remote radio unit.

[0109] Step 304: The terminal transmits a fourth positioning signal to a fourth remote radio unit.

[0110] In this embodiment, steps 301 to 304 are similar to the method performed in steps 201 to 204. The details will not be described again here.

[0111] Step 305: The first remote radio unit performs a time-of-arrival TOA measurement based on the first positioning signal to obtain first solution information.

[0112] After receiving the first positioning signal, the first remote radio unit performs a time-of-arrival TOA measurement based on the first positioning signal to obtain first solution information.

[0113] Specifically, as shown in Figure 7, before the first remote radio unit unlocks the first positioning signal, the first remote radio unit further receives SRS parameters sent by the base station from the radio frequency switching unit, the SRS parameters may include parameters such as bandwidth, signal periodicity and antenna module, the SRS parameters are for unlocking the first positioning signal.

[0114] Specifically, a first solution module may be added to the first remote radio unit to enable the first remote radio unit to solve the first positioning signal. The first solution module is configured to solve the first positioning signal to obtain first solution information. The first positioning signal can be solved by using a TOA algorithm, for example, by using a TOA algorithm such as a least squares method or a three-dimensional positioning algorithm. This is not particularly limited in this specification.

[0115] Step 306: The second remote radio unit performs a time-of-arrival TOA measurement based on the second positioning signal to obtain second solution information.

[0116] After receiving the second positioning signal, the second remote radio unit performs a time-of-arrival TOA measurement based on the second positioning signal to obtain second solution information.

[0117] Specifically, as shown in Figure 7, before the second remote radio unit unlocks the second positioning signal, the second remote radio unit further receives SRS parameters sent by the base station from the radio frequency switching unit, the SRS parameters may include parameters such as bandwidth, signal periodicity and antenna module, the SRS parameters are for unlocking the second positioning signal.

[0118] Specifically, a second solution module may be added to the second remote radio unit to enable the second remote radio unit to solve the second positioning signal. The second solution module is configured to solve the second positioning signal to obtain second solution information. The second positioning signal can be solved by using a TOA algorithm, for example, by using a TOA algorithm such as a least squares method or a three-dimensional positioning algorithm. This is not particularly limited in this specification.

[0119] Step 307: The third remote radio unit performs a time-of-arrival TOA measurement based on the third positioning signal to obtain third solution information.

[0120] After receiving the third positioning signal, the third remote radio unit performs a time-of-arrival TOA measurement based on the third positioning signal to obtain third solution information.

[0121] Specifically, as shown in Figure 7, before the third remote radio unit unlocks the third positioning signal, the third remote radio unit further receives SRS parameters sent by the base station from the radio frequency switching unit, the SRS parameters may include parameters such as bandwidth, signal periodicity and antenna module, and the SRS parameters are for unlocking the third positioning signal.

[0122] Specifically, a third solution module may be added to the third remote radio unit to enable the third remote radio unit to solve the third positioning signal. The third solution module is configured to solve the third positioning signal to obtain third solution information. The third positioning signal can be solved by using a TOA algorithm, for example, by using a TOA algorithm such as a least squares method or a three-dimensional positioning algorithm. This is not particularly limited in this specification.

[0123] Step 308: The fourth remote radio unit performs a time-of-arrival TOA measurement based on the fourth positioning signal to obtain fourth solution information.

[0124] After receiving the fourth positioning signal, the fourth remote radio unit performs a time-of-arrival TOA measurement based on the fourth positioning signal to obtain fourth solution information.

[0125] Specifically, as shown in Figure 7, before the fourth remote radio unit unlocks the fourth positioning signal, the fourth remote radio unit further receives SRS parameters sent by the base station from the radio frequency switching unit, the SRS parameters may include parameters such as bandwidth, signal periodicity and antenna module, and the SRS parameters are for unlocking the fourth positioning signal.

[0126] Specifically, a fourth solution module may be added to the fourth remote radio unit to enable the fourth remote radio unit to solve the fourth positioning signal. The fourth solution module is configured to solve the fourth positioning signal to obtain fourth solution information. The fourth positioning signal can be solved by using a TOA algorithm, for example, by using a TOA algorithm such as a least squares method or a three-dimensional positioning algorithm. This is not particularly limited in this specification.

[0127] Step 309: The first remote radio unit sends the first solution information to the radio frequency switching unit.

[0128] After the first remote radio unit obtains the first solution information, the first remote radio unit sends the first solution information to the radio frequency switching unit.

[0129] Step 310: The second remote radio unit sends second solution information to the radio frequency switching unit.

[0130] After the second remote radio unit obtains the second solution information, the second remote radio unit sends the second solution information to the radio frequency switching unit.

[0131] Step 311: The third remote radio unit sends third solution information to the radio frequency switching unit.

[0132] After the third remote radio unit obtains the third solution information, the third remote radio unit sends the third solution information to the radio frequency switching unit.

[0133] Step 312: The fourth remote radio unit sends the fourth solution information to the radio frequency switching unit.

[0134] After the fourth remote radio unit obtains the fourth solution information, the fourth remote radio unit sends the fourth solution information to the radio frequency switching unit.

[0135] Step 313: The radio frequency switching unit sends the first solution information, the second solution information, the third solution information and the fourth solution information to the base station.

[0136] After the radio frequency switching unit receives the first solution information, the second solution information, the third solution information and the fourth solution information transmitted by the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit, the radio frequency switching unit transmits the first solution information, the second solution information, the third solution information and the fourth solution information to the base station.

[0137] After receiving the first solution information, the second solution information, the third solution information, and the fourth solution information, the base station sends the first solution information, the second solution information, the third solution information, and the fourth solution information to a solution server, and the solution server calculates the positioning result of the terminal.

[0138] In this embodiment, steps 301 to 304 have no sequential relationship, step 305 and steps 302 to 304 have no sequential relationship, step 306 and steps 301, 303, and 304 have no sequential relationship, step 307 and steps 301, 302, and 304 have no sequential relationship, step 308 and steps 301 to 303 have no sequential relationship, step 309 and steps 306 to 308 have no sequential relationship, step 310 and steps 305, 307, and 308 have no sequential relationship, step 311 and steps 305, 306, and 308 have no sequential relationship, and step 312 and steps 305 to 308 have no sequential relationship.

[0139] In this embodiment of the present application, the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are solved in the first remote radio unit, the second remote radio unit, the third remote radio unit, and the fourth remote radio unit, in order to avoid the impact of intermediate link processing (such as sub-band splicing, CPRI, radio frequency combining, etc.) on delay performance. In addition, the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are solved by four remote radio units respectively, thus improving the resolution ability in unit time.

[0140] In this embodiment, air interface synchronization correction may be further performed between remote radio units, and the base station side does not need to send a reference beacon. For a specific method, please refer to the following description in the embodiment shown in Figure 6. It should be noted that the embodiment shown in Figure 6 may inherit the embodiment shown in Figure 2, or may be implemented separately. This is not particularly limited in this specification.

[0141] FIG. 6 is another schematic flow chart of a positioning method according to an embodiment of the present application.

[0142] Step 314: The first remote radio unit receives the first air interface synchronization correction message sent by the radio frequency switching unit.

[0143] When time synchronization needs to be performed between remote radio units, the correction server sends a message to the base station to initiate synchronization correction. After receiving the message, the base station initiates time synchronization between the remote radio units. It should be noted that when time synchronization needs to be performed between remote radio units, the base station may alternatively send the synchronization correction message, specifically, the base station triggers the time synchronization between the remote radio units. The specific entity that triggers the time synchronization between the remote radio units is not limited in this specification.

[0144] Specifically, the base station sends a first air interface synchronization correction message to a radio frequency switching unit, and the radio frequency switching unit forwards the first air interface synchronization correction message to a first remote radio unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a synchronization signal to another remote radio unit.

[0145] Specifically, the first air interface synchronization correction message instructs the first remote radio unit to adjust its status to a transmission state, specifically, the first remote radio unit transmits a synchronization signal to another remote radio unit, where the synchronization signal is for calculating a time difference of arrival TDOA between the first remote radio unit and the other remote radio unit, and the time difference of arrival TDOA is for performing air interface synchronization compensation at the other remote radio unit.

[0146] Step 315: The second remote radio unit receives the third air interface synchronization correction message sent by the radio frequency switching unit.

[0147] When time synchronization needs to be performed between the remote radio units, the correction server sends a message to the base station to initiate synchronization correction. After receiving the message, the base station initiates time synchronization between the remote radio units. Specifically, the base station sends a third air interface synchronization correction message to the radio frequency switching unit, and the radio frequency switching unit forwards the third air interface synchronization correction message to the second remote radio unit, where the third air interface synchronization correction message instructs the second remote radio unit to receive a synchronization signal transmitted by the first remote radio unit, specifically, instructs the second remote radio unit to receive a first synchronization signal transmitted by the first remote radio unit.

[0148] Specifically, the third air interface synchronization correction message instructs the second remote radio unit to adjust its status to a receiving state, specifically, the second remote radio unit receives a first synchronization signal transmitted by the first remote radio unit, where the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit.

[0149] Step 316: The third remote radio unit receives the fourth air interface synchronization correction message sent by the radio frequency switching unit.

[0150] When time synchronization needs to be performed between the remote radio units, the correction server sends a message to the base station to initiate synchronization correction. After receiving the message, the base station initiates time synchronization between the remote radio units. Specifically, the base station sends a fourth air interface synchronization correction message to the radio frequency switching unit, and the radio frequency switching unit forwards the fourth air interface synchronization correction message to the third remote radio unit, where the fourth air interface synchronization correction message instructs the third remote radio unit to receive the third synchronization signal transmitted by the first remote radio unit, specifically, instructs the third remote radio unit to receive the third synchronization signal transmitted by the first remote radio unit.

[0151] Specifically, the fourth air interface synchronization correction message instructs the third remote radio unit to adjust its status to a receiving state, specifically, the third remote radio unit receives a third synchronization signal transmitted by the first remote radio unit, where the third synchronization signal is for calculating a third time difference of arrival TDOA between the first remote radio unit and the third remote radio unit, and the third time difference of arrival TDOA is for performing air interface synchronization compensation at the third remote radio unit.

[0152] Step 317: The fourth remote radio unit receives the fifth air interface synchronization correction message sent by the radio frequency switching unit.

[0153] When time synchronization needs to be performed between the remote radio units, the correction server sends a message to the base station to initiate synchronization correction. After receiving the message, the base station initiates time synchronization between the remote radio units. Specifically, the base station sends a fifth air interface synchronization correction message to the radio frequency switching unit, and the radio frequency switching unit forwards the fifth air interface synchronization correction message to the fourth remote radio unit, where the fifth air interface synchronization correction message instructs the fourth remote radio unit to receive the fourth synchronization signal transmitted by the first remote radio unit, specifically, instructs the fourth remote radio unit to receive the fourth synchronization signal transmitted by the first remote radio unit.

[0154] Specifically, the fifth air interface synchronization correction message instructs the fourth remote radio unit to adjust its status to a receiving state, specifically, the fourth remote radio unit receives a fourth synchronization signal transmitted by the first remote radio unit, where the fourth synchronization signal is for calculating a fourth time difference of arrival TDOA between the first remote radio unit and the fourth remote radio unit, and the fourth time difference of arrival TDOA is for performing air interface synchronization compensation at the fourth remote radio unit.

[0155] Step 318: The first remote radio unit transmits a first synchronization signal to the second remote radio unit.

[0156] The first remote radio unit transmits a first synchronization signal based on the first air interface synchronization correction message to the second remote radio unit.

[0157] Specifically, after receiving the first synchronization signal, the second remote radio unit calculates a first receiving processing delay according to the first synchronization signal, where the first receiving processing delay indicates a processing delay that the second remote radio unit needs to use when processing the first synchronization signal after receiving the first synchronization signal transmitted by the first remote radio unit, and the first receiving processing delay may include a delay from when the second remote radio unit receives the first synchronization signal to when the first synchronization signal reaches a processing module in the second remote radio unit, and specifically, may further include more processing delays in the actual application process, which is not particularly limited in this specification.

[0158] Specifically, the calculation may be performed by using the following formula: Rx_T2-Tx_T1=Tx_1+T12+Rx_2

[0159] Rx_T2-Tx_T1 represents the first air interface time difference, specifically, the air interface time difference between the second remote radio unit and the first remote radio unit, which may be calculated by using the first synchronization signal, Tx_1 represents the transmission processing delay of the first remote radio unit transmitting the first synchronization signal, T12 represents the duration of transmitting a message from the first remote radio unit to the second remote radio unit through the air interface, and Rx_2 represents the first reception processing delay. Specifically, the transmission processing delay of the first synchronization signal indicates the delay from the time when the first remote radio unit prepares to transmit the first synchronization signal to the time when the first remote radio unit transmits the first synchronization signal. In this calculation formula, T12 is a known parameter, specifically, T12 is a period calculated by the base station side according to the air interface transmission protocol after the base station side positions the first remote radio unit and the second remote radio unit. The specific calculation method is not limited in this specification.

[0160] After calculating the first receiving processing delay, the second remote radio unit sends the first receiving processing delay to the radio frequency switching unit, the radio frequency switching unit uploads the first receiving processing delay to the base station, the base station sends the first receiving processing delay to the correction server, and finally, the correction server performs air interface synchronization compensation for all remote radio units based on all the receiving processing delay values ​​sent by all the remote radio units.

[0161] Step 319: The first remote radio unit transmits a second synchronization signal to a third remote radio unit.

[0162] The first remote radio unit transmits a third synchronization signal based on the third air interface synchronization correction message to a third remote radio unit.

[0163] Specifically, after receiving the third synchronization signal, the third remote radio unit calculates a second receiving processing delay according to the third synchronization signal, where the second receiving processing delay indicates a processing delay that the third remote radio unit needs to use when processing the third synchronization signal inside the third remote radio unit after the third remote radio unit receives the third synchronization signal transmitted by the first remote radio unit, and the second receiving processing delay may include a delay from the time when the third remote radio unit receives the third synchronization signal to the time when the third synchronization signal arrives at the processing module in the third remote radio unit, specifically, it may further include more processing delays in the actual application process, which is not particularly limited in this specification.

[0164] Specifically, the calculation may be performed by using the following formula: Rx_T3-Tx_T1=Tx_1+T13+Rx_3

[0165] Rx_T3-Tx_T1 represents the second air interface time difference, specifically, the air interface time difference between the third remote radio unit and the first remote radio unit, which may be calculated by using the third synchronization signal, Tx_1 represents the transmission processing delay of the first remote radio unit transmitting the third synchronization signal, T13 represents the duration of transmitting a message from the first remote radio unit to the third remote radio unit through the air interface, and Rx_3 represents the second reception processing delay. Specifically, the transmission processing delay of the third synchronization signal indicates the delay from the time when the first remote radio unit prepares to transmit the third synchronization signal to the time when the first remote radio unit transmits the third synchronization signal. In this calculation formula, T13 is a known parameter, specifically, T13 is a period calculated by the base station side according to the air interface transmission protocol after the base station side positions the first remote radio unit and the third remote radio unit. The specific calculation method is not limited in this specification.

[0166] After calculating the second receiving processing delay, the third remote radio unit sends the second receiving processing delay to the radio frequency switching unit, the radio frequency switching unit uploads the second receiving processing delay to the base station, the base station sends the second receiving processing delay to the correction server, and finally, the correction server performs air interface synchronization compensation for all remote radio units based on all the receiving processing delay values ​​sent by all the remote radio units.

[0167] Step 320: The first remote radio unit transmits a fourth synchronization signal to the fourth remote radio unit.

[0168] The first remote radio unit transmits a fourth synchronization signal based on the fourth air interface synchronization correction message to the fourth remote radio unit.

[0169] Specifically, after receiving the fourth synchronization signal, the fourth remote radio unit calculates a third receiving processing delay according to the fourth synchronization signal, where the third receiving processing delay indicates a processing delay that the fourth remote radio unit needs to use when processing the fourth synchronization signal inside the fourth remote radio unit after the fourth remote radio unit receives the fourth synchronization signal transmitted by the first remote radio unit, and the third receiving processing delay may include a delay from when the fourth remote radio unit receives the fourth synchronization signal to when the fourth synchronization signal arrives at the processing module in the fourth remote radio unit, and specifically, may further include more processing delays in the actual application process, which is not particularly limited in this specification.

[0170] Specifically, the calculation may be performed by using the following formula: Rx_T4-Tx_T1=Tx_1+T14+Rx_4

[0171] Rx_T4-Tx_T1 represents the third air interface time difference, specifically, the air interface time difference between the fourth remote radio unit and the first remote radio unit, which may be calculated by using the fourth synchronization signal, Tx_1 represents the transmission processing delay of the first remote radio unit transmitting the fourth synchronization signal, T14 represents the duration of transmitting a message from the first remote radio unit to the fourth remote radio unit through the air interface, and Rx_4 represents the third reception processing delay. Specifically, the transmission processing delay of the fourth synchronization signal indicates the delay from the time when the first remote radio unit prepares to transmit the fourth synchronization signal to the time when the first remote radio unit transmits the fourth synchronization signal. In this calculation formula, T14 is a known parameter, specifically, T14 is a period calculated by the base station side according to the air interface transmission protocol after the base station side positions the first remote radio unit and the fourth remote radio unit. The specific calculation method is not limited in this specification.

[0172] After calculating the third receiving processing delay, the fourth remote radio unit sends the third receiving processing delay to the radio frequency switching unit, the radio frequency switching unit uploads the third receiving processing delay to the base station, the base station sends the third receiving processing delay to the correction server, and finally, the correction server performs air interface synchronization compensation for all remote radio units based on all the receiving processing delay values ​​sent by all remote radio units.

[0173] Specifically, after receiving the receiving processing delays transmitted by multiple remote radio units, the correction server obtains the difference between the receiving processing delays between any two remote radio units based on all the receiving processing delays, and calculates the time difference that needs to be complemented for a single remote radio unit based on the multiple differences, so as to perform air interface synchronization compensation for each remote radio unit. For example, the correction server may subtract the second receiving processing delay Rx_3 from the first receiving processing delay Rx_2, then subtract the third receiving processing delay Rx_4 from the second receiving processing delay Rx_3, and then subtract the third receiving processing delay Rx_4 from the first receiving processing delay Rx_2, that is, solve the values ​​corresponding to Rx_2, Rx_3 and Rx_4 according to the three equations, and then perform air interface synchronization compensation for the second remote radio unit, the third remote radio unit and the fourth remote radio unit based on the values ​​corresponding to Rx_2, Rx_3 and Rx_4.

[0174] Step 321: The first remote radio unit receives the second air interface synchronization correction message sent by the radio frequency switching unit.

[0175] In order to improve the accuracy of the air interface synchronization compensation, each remote radio unit can be adjusted to a transmission state once to send an air interface synchronization correction message to another remote radio unit. Specifically, the first remote radio unit further receives a second air interface synchronization message sent by the radio frequency switching unit, where the second air interface synchronization message instructs the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit.

[0176] Specifically, the second air interface synchronization correction message is a message instructing the first remote radio unit to adjust its status to a receiving state, specifically, the first remote radio unit receives a second synchronization signal transmitted by a third remote radio unit, where the second synchronization signal is for calculating a second time difference of arrival TDOA between the third remote radio unit and the first remote radio unit, and the second time difference of arrival TDOA is for performing air interface synchronization compensation in the first remote radio unit.

[0177] After the first remote radio unit receives the second air interface synchronization message, the first remote radio unit receives the second synchronization signal sent by the third remote radio unit according to the second air interface synchronization correction message. The specific method of calculating the air interface synchronization compensation in the first remote radio unit is similar to the method of calculating the air interface synchronization compensation in the second remote radio unit in step 318. The details are not described again here.

[0178] It can be understood that the second remote radio unit and the fourth remote radio unit can recalculate the corresponding air interface synchronization compensation according to the synchronization signal sent by the third remote radio unit, and the specific calculation method is not described again here.

[0179] In this embodiment, steps 314 to 317 have no sequential order, steps 318 to 320 have no sequential order, steps 318, 316, and 317 have no sequential order, steps 319, 315, and 317 have no sequential order, and steps 320, 315, and 316 have no sequential order.

[0180] In this embodiment of the present application, the first remote radio unit, the second remote radio unit, the third remote radio unit and the fourth remote radio unit send synchronization correction messages to each other, so that the air interface synchronization correction can be performed among the remote radio units, and the base station side does not need to send reference beacons, thus reducing the signaling overhead of the base station.

[0181] The above describes the positioning method in the embodiment of the present application, and the following describes the remote radio unit and radio frequency switching unit in the present application.

[0182] FIG. 8 is a schematic structural diagram of a radio frequency switching unit according to an embodiment of the present application.

[0183] The radio frequency switching unit: The terminal includes a receiving unit 801 configured to receive, via a first switching module, a first message transmitted by a first remote radio unit via a first module, where the first module is a transmitting module of the first remote radio unit, the first message is for locating the terminal, and the first switching module is a receiving module of a radio frequency switching unit, where: The receiving unit 801 is further configured to receive, via the second switching module, a second message transmitted by the second remote radio unit via the second module, where the second module is a transmitting module of the second remote radio unit, the second message is for locating the terminal, and the second switching module is a receiving module of the radio frequency switching unit. The receiving unit 801 is further configured to receive, via the third switching module, a third message transmitted by the third remote radio unit via the third module, where the third module is a transmitting module of the third remote radio unit, the third message is for locating the terminal, and the third switching module is a receiving module of the radio frequency switching unit. The receiving unit 801 is further configured to receive a fourth message transmitted by a fourth remote radio unit via a fourth switching module, where the fourth module is a transmitting module of the fourth remote radio unit; message is for locating the terminal, and the fourth switching module is a receiving module of a radio frequency switching unit. The first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of a radio frequency switching unit.

[0184] In this embodiment, the method performed by each unit of the radio frequency switching unit is similar to the method performed by the radio frequency switching unit in the embodiment shown in Figures 2, 5 and 6. Details will not be described again here.

[0185] FIG. 9 is another schematic structural diagram of a radio frequency switching unit according to an embodiment of the present application.

[0186] The radio frequency switching unit: The terminal includes a receiving unit 901 configured to receive, via a first switching module, a first message transmitted by a first remote radio unit via a first module, where the first module is a transmitting module of the first remote radio unit, the first message is for locating the terminal, and the first switching module is a receiving module of a radio frequency switching unit, where: The receiving unit 901 is further configured to receive, via the second switching module, a second message transmitted by a second remote radio unit via the second module, where the second module is a transmitting module of the second remote radio unit, the second message is for locating the terminal, and the second switching module is a receiving module of the radio frequency switching unit. The receiving unit 901 is further configured to receive, via the third switching module, a third message transmitted by the third remote radio unit via the third module, where the third module is a transmitting module of the third remote radio unit, the third message is for locating the terminal, and the third switching module is a receiving module of the radio frequency switching unit. The receiving unit 901 is further configured to receive a fourth message transmitted by a fourth remote radio unit via a fourth switching module, where the fourth module is a transmitting module of the fourth remote radio unit; message is for locating the terminal, and the fourth switching module is a receiving module of a radio frequency switching unit. The first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of a radio frequency switching unit.

[0187] Optionally, the first message is a first positioning signal, the second message is a second positioning signal, the third message is a third positioning signal, and the fourth message is a fourth positioning signal, and the radio frequency switching unit is: The wireless communication system further includes a transmitting unit 902 configured to transmit the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to a base station, where the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are used for location resolution.

[0188] Optionally, the first message is first solution information, the second message is second solution information, the third message is third solution information, and the fourth message is fourth solution information; the sending unit is further configured to send the first solution information, the second solution information, the third solution information, and the fourth solution information to the base station, where the first solution information is obtained by performing location solving based on the first positioning signal by the first remote radio unit, and the second solution information is obtained by performing location solving based on the second positioning signal by the second remote radio unit. Location and performing a solution on the third remote radio unit based on the third positioning signal, the third solution information being obtained by performing a solution on the third remote radio unit based on the third positioning signal. Location and performing a solution on the fourth remote radio unit based on the fourth positioning signal, the fourth solution information being obtained by performing a solution on the fourth remote radio unit based on the fourth positioning signal. Location The solution is obtained by implementing a solution, in which a first positioning signal is transmitted by the terminal to a first remote radio unit, a second positioning signal is transmitted by the terminal to a second remote radio unit, a third positioning signal is transmitted by the terminal to a third remote radio unit, and a fourth positioning signal is transmitted by the terminal to a fourth remote radio unit.

[0189] In this embodiment, the method performed by each unit of the radio frequency switching unit is similar to the method performed by the radio frequency switching unit in the embodiment shown in Figures 2, 5 and 6. Details will not be described again here.

[0190] FIG. 10 is a schematic structural diagram of a remote radio unit according to an embodiment of the present application.

[0191] The remote radio unit: A receiving unit 1001 configured to receive, via a first receiving module, a first positioning signal transmitted by a terminal; A processing unit 1002 configured to perform a time of arrival TOA measurement based on the first positioning signal to obtain first solution information; a sending unit 1003 configured to send the first solution information to the radio frequency switching unit; Includes.

[0192] In this embodiment, the method performed by each of the remote radio units is similar to the method performed by the first remote radio unit in the embodiment shown in Figures 2, 5 and 6. The details will not be described again here.

[0193] FIG. 10 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application.

[0194] The remote radio unit: A receiving unit 1001 configured to receive, via a first receiving module, a first positioning signal transmitted by a terminal; A processing unit 1002 configured to perform a time of arrival TOA measurement based on the first positioning signal to obtain first solution information; a sending unit 1003 configured to send the first solution information to the radio frequency switching unit; Includes.

[0195] Optionally, the receiving unit 1001 is further configured to receive a first air interface synchronization correction message sent by the radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to the second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; The transmitting unit 1003 is further configured to transmit the first synchronization signal to the second remote radio unit based on the air interface synchronization correction message.

[0196] Optionally, the receiving unit 1001 is specifically configured to receive a second air interface synchronization correction message sent by the radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; The receiving unit 1001 is further configured to receive a second synchronization signal transmitted by a third remote radio unit according to the second air interface synchronization correction message; The processing unit 1002 is further configured to perform calculations based on the second synchronization signal to obtain a second time difference of arrival TDOA, where the second time difference of arrival TDOA is for performing air interface synchronization compensation at the first remote radio unit; The sending unit 1003 is further configured to send the second time difference of arrival TDOA to the radio frequency switching unit.

[0197] In this embodiment, the method performed by each of the remote radio units is similar to the method performed by the first remote radio unit in the embodiment shown in Figures 2, 5 and 6. The details will not be described again here.

[0198] FIG. 11 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application.

[0199] The remote radio unit: a receiving unit 1101 configured to receive a first air interface synchronization correction message sent by a radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to the second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; a transmitting unit 1102 configured to transmit a first synchronization signal to a second remote radio unit based on the air interface synchronization correction message; Includes.

[0200] In this embodiment, the method performed by each of the remote radio units is similar to the method performed by the first remote radio unit in the embodiment shown in Figures 2, 5 and 6. The details will not be described again here.

[0201] FIG. 12 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application.

[0202] The remote radio unit: a receiving unit 1201 configured to receive a first air interface synchronization correction message sent by a radio frequency switching unit, where the first air interface synchronization correction message instructs the first remote radio unit to send a first synchronization signal to the second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; A transmitting unit 1202 configured to transmit a first synchronization signal to a second remote radio unit based on the air interface synchronization correction message; Includes.

[0203] Optionally, the receiving unit 1201 is further configured to receive a second air interface synchronization correction message sent by the radio frequency switching unit, where the second air interface synchronization correction message instructs the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; The receiving unit 1201 is further configured to receive a second synchronization signal transmitted by a third remote radio unit according to the second air interface synchronization correction message; The remote radio unit is and a processing unit 1203 configured to perform calculations based on the second synchronization signal to obtain a second time difference of arrival TDOA, where the second time difference of arrival TDOA is for performing air interface synchronization compensation at the first remote radio unit, where: The sending unit 1202 is further configured to send the second time difference of arrival TDOA to the radio frequency switching unit.

[0204] In this embodiment, the method performed by each of the remote radio units is similar to the method performed by the first remote radio unit in the embodiment shown in Figures 2, 5 and 6. The details will not be described again here.

[0205] FIG. 13 is another schematic structural diagram of a radio frequency switching unit according to an embodiment of the present application.

[0206] The radio frequency switching unit includes a processor 1301, a memory 1302, a bus 1305 and an interface 1304. The processor 1301 is connected to the memory 1302 and the interface 1304. The bus 1305 is connected to the processor 1301, the memory 1302 and the interface 1304, respectively. The interface 1304 is configured to receive or transmit data. The processor 1301 is a single-core or multi-core central processing unit, or an application specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention. The memory 1302 may be a random access memory (RAM) or a non-volatile memory, for example at least one hard disk memory. The memory 1302 is configured to store computer-executable instructions. In particular, the computer-executable instructions may include a program 1303.

[0207] In this embodiment, when the processor 1301 calls the program 1303, the radio frequency switching unit of Fig. 13 is enabled to carry out the operations performed by the radio frequency switching unit in the embodiment shown in Fig. 2, Fig. 5 or Fig. 6. The details will not be described again here.

[0208] FIG. 14 is another schematic structural diagram of a remote radio unit according to an embodiment of the present application.

[0209] The remote radio unit includes a processor 1401, a memory 1402, a bus 1405 and an interface 1404. The processor 1401 is connected to the memory 1402 and the interface 1404. The bus 1405 is connected to the processor 1401, the memory 1402 and the interface 1404, respectively. The interface 1404 is configured to receive or transmit data. The processor 1401 is a single-core or multi-core central processing unit, or an application specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention. The memory 1402 may be a random access memory (RAM) or a non-volatile memory, for example at least one hard disk memory. The memory 1402 is configured to store computer-executable instructions. In particular, the computer-executable instructions may include a program 1403.

[0210] In this embodiment, processor 1401 invokes program 1403, enabling the remote radio unit of Figure 14 to perform the operations performed by the first remote radio unit in the embodiments shown in Figure 2, Figure 5 or Figure 6. The details will not be described again here.

[0211] In the above embodiment of the present application remoteIt is understood that the processor mentioned in the radio unit or radio frequency switching unit or provided in the above embodiments of the present application may be a central processing unit (CPU); or may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0212] In the above embodiment of the present application, remote It should be further understood that there may be one or more processors in the radio unit or radio frequency switching unit. The quantity may be adjusted based on the actual application scenario. This is merely an example for explanation in this specification, and does not constitute a limitation. In the embodiment of the present application, there may be one or more memories. The quantity may be adjusted based on the actual application scenario. This is merely an example for explanation in this specification, and does not constitute a limitation.

[0213] remote It should be further noted that when the radio unit or radio frequency switching unit includes a processor (or processing unit) and a memory, the processor in this application may be integrated with the memory, or the processor may be connected to the memory via an interface, which may be adjusted based on the actual application scenario and does not constitute a limitation.

[0214] The present application provides a chip system, the chip system being configured to implement the functions of the controller in the above-mentioned method, for example, the functions of processing data and / or information in the above-mentioned method, remote The chip system may include a processor configured to support the radio unit or radio frequency switching unit. In a possible design, the chip system may further include a memory. The memory is configured to store necessary program instructions and necessary data. The chip system may include the chip, or may include the chip and other discrete components.

[0215] In another possible design, when the chip system is a chip in a user equipment or an access network, etc., the chip includes a processing unit and a communication unit, where the processing unit may be, for example, a processor, and the communication unit may be, for example, an input / output interface, pins, or circuitry. The processing unit may execute computer-executable instructions stored in the storage unit, so that the chip in the remote radio unit, radio frequency switching unit, etc. performs the steps performed by the first remote radio unit or radio frequency switching unit in either the embodiment of FIG. 3 or FIG. 4. Optionally, the storage unit is a storage unit within the chip, such as a register or buffer, or the storage unit may be a storage unit outside the chip but within the remote radio unit or radio frequency switching unit, such as a read-only memory (ROM), another type of static storage device that can store static information and instructions, or a random access memory (RAM).

[0216] An embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a computer, the method steps performed by the controller of the remote radio unit or the radio frequency switching unit in any one of the above-mentioned method embodiments are implemented. Correspondingly, the computer may be the above-mentioned remote radio unit or the radio frequency switching unit.

[0217] It should be understood that the controller or processor referred to in the foregoing embodiments of the present application may be a central processing unit (CPU); or may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0218] In the above embodiment of the present application, remote It should be further understood that there may be one or more processors or controllers in a radio unit, a radio frequency switching unit, a chip system, etc. The quantity may be adjusted based on an actual application scenario. This is merely an example for explanation in this specification, and does not constitute a limitation. In an embodiment of the present application, there may be one or more memories. The quantity may be adjusted based on an actual application scenario. This is merely an example for explanation in this specification, and does not constitute a limitation.

[0219] In the embodiment of the present application, remote It should be further understood that the memory, readable storage media, etc. mentioned in the radio unit or radio frequency switching unit may be volatile or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM) or flash memory. Volatile memory may be random access memory (RAM) used as an external cache. Many forms of RAM are available, such as, by way of example and not limitation, static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchlink dynamic random access memory (synchlink DRAM, SLDRAM), and direct rambus random access memory (direct rambus RAM, DR RAM).

[0220] Those skilled in the art may understand that all or part of the steps performed by the remote radio unit, the radio frequency switching unit or the processor to implement the above-mentioned embodiments may be implemented by hardware or a program instructing the relevant hardware. The program may be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a random access memory, etc. In particular, for example, the above-mentioned processing unit or processor may be a central processing unit, a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but the implementation should not be considered as going beyond the scope of this application.

[0221] When software is used to implement the embodiments, all or part of the steps of the method described in the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the procedures or functions according to the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, or microwave) manner. The computer-readable storage medium may be any available medium accessible by a computer, or a data storage device such as a server or data center that integrates one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, or a magnetic tape), an optical medium (eg, a DVD), a semiconductor medium, or the like.

[0222] In the specification, claims and accompanying drawings of this application, terms such as "first" and "second" are intended to distinguish between similar objects, but do not necessarily indicate a particular sequence or order. It should be understood that terms used in this manner are interchangeable in appropriate circumstances, and are merely a distinguishing method for describing objects having the same attributes in the embodiments of this application. In addition, the terms "include", "contain" and any other variations are meant to cover a non-exclusive inclusion, such that a process, method, system, product or device that includes a set of units is not necessarily limited to those units, but may include other units that are not expressly listed or inherent in such a process, method, system, product or device.

[0223] The terms used in the embodiments of this application are merely for illustrating certain embodiments and are not intended to limit the present invention. The singular terms "a" and "the" used in the embodiments of this application are intended to include the plural, unless otherwise clearly specified in the context. In the description of this application, it is further understood that " / " represents an "or" relationship between related objects, unless otherwise specified. For example, A / B may represent A or B. The term "and / or" in this application is merely a relationship between related objects, and represents that three relationships may exist. For example, A and / or B may represent the following three cases: only A is present, both A and B are present, and only B is present, where A and B may each be singular or plural.

[0224] For example, depending on the context, the word "if" as used herein may be interpreted as "while" or "when" or "response to determining" or "response to detecting." Similarly, depending on the context, the phrase "if determined" or "if detected (a described condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detected (a described condition or event)" or "in response to detecting (a described condition or event)."

[0225] In conclusion, the above embodiments are merely intended to describe the technical solutions of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, it should be understood that those skilled in the art may still make modifications to the technical solutions described in the above embodiments, or make equivalent substitutions to some technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present application. According to an example of the present invention, the present application further provides the following embodiments. Embodiment 1: A positioning method comprising: receiving, by a radio frequency switching unit, via a first switching module, a first message transmitted by a first remote radio unit via a first module, the first module being a transmitting module of the first remote radio unit, the first message being for locating a terminal, and the first switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, via a second switching module, a second message transmitted by a second remote radio unit via a second module, the second module being a transmitting module of the second remote radio unit, the second message being for locating the terminal, and the second switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, a third message transmitted by a third remote radio unit via a third module, the third module being a transmitting module of the third remote radio unit, the third message being for locating the terminal, and the third switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, a fourth message transmitted by a fourth remote radio unit via a fourth module through a fourth switching module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth message being for locating the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit; Including, The method, wherein the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit. Embodiment 2: The first message is a first positioning signal, the second message is a second positioning signal, the third message is a third positioning signal, and the fourth message is a fourth positioning signal, and the method includes: and transmitting the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal to a base station by the radio frequency switching unit, wherein the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are used for location resolution. 2. The method of embodiment 1. Embodiment 3: The first message is first solution information, the second message is second solution information, the third message is third solution information, and the fourth message is fourth solution information, and the method includes: the first solution information, the second solution information, the third solution information, and the fourth solution information to a base station by the radio frequency switching unit, wherein the first solution information is obtained by performing location resolution based on a first positioning signal by the first remote radio unit, the second solution information is obtained by performing resolution based on a second positioning signal by the second remote radio unit, the third solution information is obtained by performing resolution based on a third positioning signal by the third remote radio unit, and the fourth solution information is obtained by performing resolution based on a fourth positioning signal by the fourth remote radio unit, the first positioning signal is transmitted by the terminal to the first remote radio unit, the second positioning signal is transmitted by the terminal to the second remote radio unit, the third positioning signal is transmitted by the terminal to the third remote radio unit, and the fourth positioning signal is transmitted by the terminal to the fourth remote radio unit. 2. The method of embodiment 1. Embodiment 4: A positioning method comprising the steps of: receiving, by a first remote radio unit, a first positioning signal transmitted by the terminal via a first receiving module; performing, by the first remote radio unit, a time-of-arrival (TOA) measurement based on the first positioning signal to obtain first solution information; transmitting, by the first remote radio unit, the first solution information to a radio frequency switching unit; A method comprising: Embodiment 5: The method comprises: receiving, by the first remote radio unit, a first air interface synchronization correction message sent by the radio frequency switching unit, the first air interface synchronization correction message instructing the first remote radio unit to send a first synchronization signal to a second remote radio unit, the first synchronization signal for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, the first time difference of arrival TDOA for performing air interface synchronization compensation at the second remote radio unit; transmitting, by the first remote radio unit, the first synchronization signal to the second remote radio unit based on an air interface synchronization correction message; 5. The method of embodiment 4, further comprising: Embodiment 6: The method comprises: receiving, by the first remote radio unit, a second air interface synchronization correction message transmitted by the radio frequency switching unit, the second air interface synchronization correction message indicating that the first remote radio unit should receive a second synchronization signal transmitted by a third remote radio unit; receiving, by the first remote radio unit, the second synchronization signal transmitted by the third remote radio unit based on the second air interface synchronization correction message; performing, by a first radio frequency unit, a calculation based on the second synchronization signal to obtain a second time difference of arrival TDOA, the second time difference of arrival TDOA being for performing air interface synchronization compensation at the first remote radio unit; transmitting, by the first radio frequency unit, the second time difference of arrival TDOA to the radio frequency switching unit; 6. The method of embodiment 4 or 5, further comprising: Embodiment 7: A positioning method comprising the steps of: receiving, by a first remote radio unit, a first air interface synchronization correction message sent by a radio frequency switching unit, the first air interface synchronization correction message instructing the first remote radio unit to send a first synchronization signal to a second remote radio unit, the first synchronization signal for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, the first time difference of arrival TDOA for performing air interface synchronization compensation at the second remote radio unit; transmitting, by the first remote radio unit, the first synchronization signal to the second remote radio unit based on an air interface synchronization correction message; A method comprising: Embodiment 8: The method comprises: receiving, by the first remote radio unit, a second air interface synchronization correction message transmitted by the radio frequency switching unit, the second air interface synchronization correction message indicating that the first remote radio unit should receive a second synchronization signal transmitted by a third remote radio unit; receiving, by the first remote radio unit, the second synchronization signal transmitted by the third remote radio unit based on the second air interface synchronization correction message; performing, by a first radio frequency unit, a calculation based on the second synchronization signal to obtain a second time difference of arrival TDOA, the second time difference of arrival TDOA being for performing air interface synchronization compensation at the first remote radio unit; transmitting, by the first radio frequency unit, the second time difference of arrival TDOA to the radio frequency switching unit; 8. The method of embodiment 7, further comprising: Embodiment 9: A radio frequency switching unit, comprising: a receiving unit configured to receive, via a first switching module, a first message transmitted by a first remote radio unit via a first module, the first module being a transmitting module of the first remote radio unit, the first message being for positioning a terminal, the first switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a second switching module, a second message transmitted by a second remote radio unit via a second module, the second module being a transmitting module of the second remote radio unit, the second message being for locating the terminal, and the second switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a third switching module, a third message transmitted by a third remote radio unit via a third module, the third module being a transmitting module of the third remote radio unit, the third message being for locating the terminal, and the third switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a fourth switching module, a fourth message transmitted by a fourth remote radio unit via a fourth module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth message being for locating the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit; A radio frequency switching unit, wherein the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit. Embodiment 10: The first message is a first positioning signal, the second message is a second positioning signal, the third message is a third positioning signal, and the fourth message is a fourth positioning signal, and the radio frequency switching unit is: a transmitting unit configured to transmit the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal to a base station, wherein the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are used for location resolution; 10. A radio frequency switching unit as described in embodiment 9. Embodiment 11: The first message is first solution information, the second message is second solution information, the third message is third solution information, and the fourth message is fourth solution information, and the transmitting unit is further configured to transmit the first solution information, the second solution information, the third solution information, and the fourth solution information to the base station, wherein the first solution information is obtained by performing a location solution based on the first positioning signal by the first remote radio unit, the second solution information is obtained by performing a solution based on the second positioning signal by the second remote radio unit, the third solution information is obtained by performing a solution based on the third positioning signal by the third remote radio unit, and the fourth solution information is obtained by performing a solution based on the fourth positioning signal by the fourth remote radio unit, the first positioning signal is transmitted by the terminal to the first remote radio unit, the second positioning signal is transmitted by the terminal to the second remote radio unit, the third positioning signal is transmitted by the terminal to the third remote radio unit, and the fourth positioning signal is transmitted by the terminal to the fourth remote radio unit. A radio frequency switching unit as described in embodiment 10. Embodiment 12: A remote radio unit, comprising: a receiving unit configured to receive a first positioning signal transmitted by the terminal via a first receiving module; a processing unit configured to perform a time-of-arrival TOA measurement based on the first positioning signal to obtain first solution information; a sending unit configured to send the first solution information to a radio frequency switching unit; a remote radio unit including: Embodiment 13: The receiving unit is further configured to receive a first air interface synchronization correction message sent by the radio frequency switching unit, the first air interface synchronization correction message instructing a first remote radio unit to send a first synchronization signal to a second remote radio unit, the first synchronization signal is for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, and the first time difference of arrival TDOA is for performing air interface synchronization compensation at the second remote radio unit; the transmitting unit is further configured to transmit the first synchronization signal to the second remote radio unit based on an air interface synchronization correction message. 13. The remote radio unit of embodiment 12. Embodiment 14: The receiving unit is specifically configured to receive a second air interface synchronization correction message sent by the radio frequency switching unit, the second air interface synchronization correction message instructing the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; the receiving unit is further configured to receive the second synchronization signal transmitted by the third remote radio unit based on the second air interface synchronization correction message; The processing unit is further configured to perform calculations based on the second synchronization signal to obtain a second time difference of arrival TDOA, the second time difference of arrival TDOA being for performing air interface synchronization compensation at the first remote radio unit; the transmitting unit is further configured to transmit the second time difference of arrival TDOA to the radio frequency switching unit. 14. A remote radio unit as claimed in any one of claims 12 to 13. Embodiment 15: A remote radio unit, comprising: a receiving unit configured to receive a first air interface synchronization correction message sent by a radio frequency switching unit, the first air interface synchronization correction message instructing a first remote radio unit to send a first synchronization signal to a second remote radio unit, the first synchronization signal being for calculating a first time difference of arrival TDOA between the first remote radio unit and the second remote radio unit, the first time difference of arrival TDOA being for performing air interface synchronization compensation at the second remote radio unit; a transmitting unit configured to transmit the first synchronization signal to the second remote radio unit based on an air interface synchronization correction message; a remote radio unit including: Embodiment 16: The receiving unit is further configured to receive a second air interface synchronization correction message sent by the radio frequency switching unit, the second air interface synchronization correction message instructing the first remote radio unit to receive a second synchronization signal sent by a third remote radio unit; the receiving unit is further configured to receive the second synchronization signal transmitted by the third remote radio unit based on the second air interface synchronization correction message; The remote radio unit comprises: and a processing unit configured to perform a calculation based on the second synchronization signal to obtain a second time difference of arrival TDOA, the second time difference of arrival TDOA being for performing air interface synchronization compensation at the first remote radio unit; the transmitting unit is further configured to transmit the second time difference of arrival TDOA to the radio frequency switching unit. 16. The remote radio unit of embodiment 15. Embodiment 17: A readable storage medium configured to store instructions, which, when executed, implement the method of any one of embodiments 1 to 8.

Claims

1. A positioning method comprising the steps of: receiving, by a radio frequency switching unit, a first positioning signal transmitted by a first remote radio unit through a first module, the first module being a transmitting module of the first remote radio unit, the first positioning signal being for positioning a terminal, and the first switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, through a second switching module, a second positioning signal transmitted by a second remote radio unit through a second module, the second module being a transmitting module of the second remote radio unit, the second positioning signal being for positioning the terminal, and the second switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, a third positioning signal transmitted by a third remote radio unit through a third module, the third module being a transmitting module of the third remote radio unit, the third positioning signal being for positioning the terminal, and the third switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, a fourth positioning signal transmitted by a fourth remote radio unit through a fourth module via a fourth switching module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth positioning signal being for positioning the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit; transmitting the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal to a base station by the radio frequency switching unit; Including, a first module, a second module, a third module and a fourth module being different transmitting modules from each other, and a first switching module, a second switching module, a third switching module and a fourth switching module being different receiving modules of the radio frequency switching unit, and the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal are transmitted to the base station separately by the radio frequency switching unit through four transmitting modules.

2. The first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are used in the base station for positioning the terminal. The method of claim 1.

3. A positioning method comprising: receiving, by a radio frequency switching unit, first solution information transmitted by a first remote radio unit through a first module, the first module being a transmitting module of the first remote radio unit; the first solution information being obtained by the first remote radio unit by performing a time-of-arrival (TOA) measurement based on a first positioning signal transmitted from a terminal, the first switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, second solution information transmitted by a second remote radio unit through a second module, the second module being a transmitting module of the second remote radio unit; the second solution information being obtained by the second remote radio unit by performing a time-of-arrival (TOA) measurement based on a second positioning signal transmitted from the terminal, the second switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, third solution information transmitted by a third remote radio unit through a third module, the third module being a transmitting module of the third remote radio unit; the third solution information being obtained by the third remote radio unit by performing a time-of-arrival (TOA) measurement based on a third positioning signal transmitted from the terminal, the third switching module being a receiving module of the radio frequency switching unit; receiving, by the radio frequency switching unit, fourth solution information transmitted by a fourth remote radio unit through a fourth module via a fourth switching module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth solution information being obtained by the fourth remote radio unit performing a time-of-arrival (TOA) measurement based on a fourth positioning signal transmitted from the terminal, the fourth switching module being a receiving module of the radio frequency switching unit; sending the first solution information, the second solution information, the third solution information, and the fourth solution information to a base station by the radio frequency switching unit; Including, the first module, the second module, the third module and the fourth module are different transmitting modules, the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit, and the first solution information, the second solution information, the third solution information and the fourth solution information are separately transmitted to the base station by the radio frequency switching unit through four transmitting modules; method.

4. 1. A radio frequency switching unit, comprising: a receiving unit configured to receive, via a first switching module, a first positioning signal transmitted by a first remote radio unit via a first module, the first module being a transmitting module of the first remote radio unit, the first positioning signal being for positioning a terminal, and the first switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a second switching module, a second positioning signal transmitted by a second remote radio unit via a second module, the second module being a transmitting module of the second remote radio unit, the second positioning signal being for positioning the terminal, and the second switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a third switching module, a third positioning signal transmitted by a third remote radio unit via a third module, the third module being a transmitting module of the third remote radio unit, the third positioning signal being for locating the terminal, and the third switching module being a receiving module of the radio frequency switching unit; the receiving unit is further configured to receive, via a fourth switching module, a fourth positioning signal transmitted by a fourth remote radio unit via a fourth module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth positioning signal being for locating the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit; the radio frequency switching unit further includes a transmitting unit configured to transmit the first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal to a base station; the first module, the second module, the third module and the fourth module are different transmitting modules, the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit, and the transmitting unit is configured to transmit the first positioning signal, the second positioning signal, the third positioning signal and the fourth positioning signal to the base station separately through four transmitting modules; Radio frequency switching unit.

5. The first positioning signal, the second positioning signal, the third positioning signal, and the fourth positioning signal are used in the base station for positioning the terminal.

5. A radio frequency switching unit as claimed in claim 4.

6. A radio frequency switching unit, comprising: a receiving unit configured to receive, via a first switching module, first solution information transmitted by a first remote radio unit via a first module, the first module being a transmitting module of the first remote radio unit, the first solution information being obtained by the first remote radio unit by performing a time-of-arrival (TOA) measurement based on a first positioning signal transmitted from a terminal, the first switching module being a receiving module of the radio frequency switching unit; The receiving unit is further configured to receive, via a second switching module, second solution information transmitted by a second remote radio unit via a second module, the second module being a transmitting module of the second remote radio unit, the second solution information being obtained by the second remote radio unit by performing a time-of-arrival TOA measurement based on a second positioning signal transmitted from the terminal, and the second switching module being a receiving module of the radio frequency switching unit; The receiving unit is further configured to receive, via a third switching module, third solution information transmitted by a third remote radio unit via a third module, the third module being a transmitting module of the third remote radio unit, the third solution information being obtained by the third remote radio unit by performing a time-of-arrival TOA measurement based on a third positioning signal transmitted from the terminal, and the third switching module being a receiving module of the radio frequency switching unit; The receiving unit is further configured to receive, via a fourth switching module, fourth solution information transmitted by a fourth remote radio unit via a fourth module, the fourth module being a transmitting module of the fourth remote radio unit, the fourth solution information being obtained by the fourth remote radio unit by performing a time-of-arrival (TOA) measurement based on a fourth positioning signal transmitted from the terminal, and the fourth switching module being a receiving module of the radio frequency switching unit; The radio frequency switching unit further includes a transmitting unit configured to transmit the first solution information, the second solution information, the third solution information, and the fourth solution information to a base station; the first module, the second module, the third module and the fourth module are different transmitting modules, the first switching module, the second switching module, the third switching module and the fourth switching module are different receiving modules of the radio frequency switching unit, and the transmitting unit is configured to transmit the first solution information, the second solution information, the third solution information and the fourth solution information to the base station separately through four transmitting modules; Radio frequency switching unit.

7. A readable storage medium configured to store instructions which, when executed, implement the method of any one of claims 1 to 3.

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