Method and apparatus for base station capacity expansion of a positioning system, positioning system and base station

Abstract

The application relates to a base station capacity expansion method and device of a positioning system, the positioning system, a base station, a storage medium and a computer program product. The positioning system covers at least two minimum repeating units, each minimum repeating unit comprises a synchronous base station and at least three cells of adjacent and different channels, and the signal radiation ranges of the synchronous base stations in adjacent minimum repeating units are overlapped; the method comprises the following steps: in response to detecting a synchronization signal emitted by other synchronous base stations, determining a first time period of a synchronization time slot to which a target synchronous base station belongs in a synchronization period; and in the first time period, respectively emitting the synchronization signal by using different channels of the at least three cells. The synchronization signal is used for indicating that the synchronization signal is emitted by the synchronous base station which detects the synchronization signal, and the synchronization signal is also used for indicating that a positioning signal is emitted or received by a positioning base station which detects the synchronization signal, and the positioning signal is used for positioning. By adopting the method, the base station capacity of the positioning system can be expanded.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a base station capacity expansion method and device of a positioning system, the positioning system, the base station and a computer readable storage medium. BACKGROUND

[0002] In the positioning system, the terminal device only needs to passively receive the positioning signal sent by the base station, and calculates the current position of the terminal device according to the time difference of arrival of the positioning signal of each base station. Therefore, the normal periodic operation of the entire positioning system depends on whether the base station can orderly send the positioning signal in turn. The time occupied by each base station to send the positioning signal is called a time slot. In order to avoid signal collision, only one base station can be in each time slot, and it can be considered that a certain time slot is allocated to a certain base station.

[0003] The traditional positioning system usually allocates time slots to each base station in a time division multiplexing manner, that is, as many time slots as possible are divided in a period, and a new time slot number is allocated to each newly added base station until all the time in the period is occupied.

[0004] However, the number of time slots in a period is limited, and the traditional positioning system has the problem of small base station capacity. SUMMARY

[0005] The embodiments of the present application provide a base station capacity expansion method, a positioning system, a device, a base station, a computer readable storage medium and a computer program product of a positioning system, which can expand the base station capacity in the positioning system.

[0006] In a first aspect, the present application provides a base station capacity expansion method of a positioning system, the positioning system covering at least two minimum repeating units, each minimum repeating unit including a synchronization base station and at least three cells of adjacent and different channels, each cell including at least one positioning base station, and the signal radiation range of the synchronization base stations between adjacent minimum repeating units overlapping. The method is applied to a target synchronization base station, and the method includes:

[0007] In response to detecting a synchronization signal transmitted by other synchronization base stations, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period;

[0008] In the first time period, the synchronization signal is transmitted using different channels of at least three cells respectively; the synchronization signal is used to indicate that the synchronization base station detecting the synchronization signal transmits the synchronization signal, and the synchronization signal is also used to indicate that the positioning base station detecting the synchronization signal transmits or receives a positioning signal for positioning.

[0009] In a second aspect, the application provides a method for extending the capacity of base stations of a positioning system, the positioning system covering at least two minimum repeating units, each minimum repeating unit comprising a synchronization base station and at least three cells of adjacent and different channels, each cell comprising at least one positioning base station, the signal radiation ranges of the synchronization base stations of adjacent minimum repeating units being overlapped. The method is applied to a target positioning base station, and the method comprises:

[0010] determining, in response to a detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0011] transmitting or receiving a positioning signal in the second time period; the positioning signal is used for positioning.

[0012] In a third aspect, the application also provides a positioning system, characterized in that the positioning system covers at least two minimum repeating units, each minimum repeating unit comprising a synchronization base station and at least three cells of adjacent and different channels, each cell comprising at least one positioning base station, the signal radiation ranges of the synchronization base stations of adjacent minimum repeating units being overlapped; wherein,

[0013] the synchronization base station is configured to determine, in response to a detected synchronization signal transmitted by another synchronization base station, a first time period of a synchronization time slot to which the synchronization base station belongs in a synchronization period; and transmit the synchronization signal using different channels of the at least three cells respectively in the first time period;

[0014] the positioning base station is configured to determine, in response to a detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the positioning base station belongs in a positioning period; and transmit or receive a positioning signal in the second time period; the positioning signal is used for positioning.

[0015] In a fourth aspect, the application also provides a device for extending the capacity of base stations of a positioning system, the positioning system covering at least two minimum repeating units, each minimum repeating unit comprising a synchronization base station and at least three cells of adjacent and different channels, each cell comprising at least one positioning base station, the signal radiation ranges of the synchronization base stations of adjacent minimum repeating units being overlapped. The method is applied to a target synchronization base station, and the device comprises:

[0016] a first determining module configured to determine, in response to a detected synchronization signal transmitted by another synchronization base station, a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period;

[0017] a transmitting module, configured to transmit the synchronization signals using different channels of at least three cells respectively in the first time period; the synchronization signals are used to instruct a synchronization base station detecting the synchronization signals to transmit the synchronization signals, and are also used to instruct a positioning base station detecting the synchronization signals to transmit or receive a positioning signal used for positioning.

[0018] In a fifth aspect, the application further provides a base station capacity expansion device of a positioning system, the positioning system covering at least two minimum repeating units, each minimum repeating unit including a synchronization base station and at least three cells of adjacent and different channels, each cell including at least one positioning base station, and the signal radiation ranges of the synchronization base stations in adjacent minimum repeating units overlapping. The method is applied to a target positioning base station, and the device includes:

[0019] a second determining module, configured to determine a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period in response to the synchronization signal transmitted by the detected synchronization base station; the synchronization signal transmitted by the synchronization base station is transmitted in the case that the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0020] a transceiving module, configured to transmit or receive a positioning signal in the second time period; the positioning signal is used for positioning.

[0021] In a sixth aspect, the application further provides a target synchronization base station. The target synchronization base station includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0022] in response to detecting a synchronization signal transmitted by another synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period;

[0023] transmit the synchronization signals using different channels of at least three cells respectively in the first time period; the synchronization signals are used to instruct a synchronization base station detecting the synchronization signals to transmit the synchronization signals, and are also used to instruct a positioning base station detecting the synchronization signals to transmit or receive a positioning signal used for positioning.

[0024] In a seventh aspect, the application further provides a target positioning base station. The target positioning base station includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0025] determining, in response to the detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0026] transmitting or receiving a positioning signal in the second time period; the positioning signal is used for positioning.

[0027] In an eighth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium has a computer program stored thereon, and the computer program, when executed by a processor, implements the following steps:

[0028] determining, in response to the detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0029] transmitting the synchronization signal using different channels of at least three cells respectively in the first time period; the synchronization signal is used for indicating that a synchronization base station detecting the synchronization signal transmits the synchronization signal, and the synchronization signal is also used for indicating that a positioning base station detecting the synchronization signal transmits or receives a positioning signal, and the positioning signal is used for positioning.

[0030] In a ninth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium has a computer program stored thereon, and the computer program, when executed by a processor, implements the following steps:

[0031] determining, in response to the detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0032] transmitting or receiving a positioning signal in the second time period; the positioning signal is used for positioning.

[0033] In a tenth aspect, the present application further provides a computer program product. The computer program product comprises a computer program, and the computer program, when executed by a processor, implements the following steps:

[0034] determining, in response to the detected synchronization signal transmitted by the synchronization base station, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station;

[0035] transmit the synchronization signal using different channels of at least three cells respectively in the first time period; the synchronization signal is used to indicate that a synchronization base station detecting the synchronization signal transmits the synchronization signal, and the synchronization signal is also used to indicate that a positioning base station detecting the synchronization signal transmits or receives a positioning signal used for positioning.

[0036] In a eleventh aspect, the present application provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the following steps:

[0037] In response to the detected synchronization signal transmitted by the synchronization base station, determining a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period; the synchronization signal transmitted by the synchronization base station is transmitted in the case that the synchronization base station detects the synchronization signal transmitted by other synchronization base station;

[0038] transmitting or receiving a positioning signal in the second time period; the positioning signal is used for positioning.

[0039] The base station capacity expansion method of the positioning system, the positioning system, the device, the base station, the computer readable storage medium and the computer program product, the positioning system covers at least two minimum repeating units, each minimum repeating unit comprises a synchronization base station and at least three cells of adjacent and different channels, each cell comprises at least one positioning base station, the signal radiation range of the synchronization base station between adjacent minimum repeating units is overlapped; the target synchronization base station determines a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to detecting a synchronization signal transmitted by other synchronization base station, and the target synchronization base station transmits the synchronization signal using different channels of at least three cells respectively in the first time period; that is, the target synchronization base station continues to transmit the synchronization signal in the signal radiation range after detecting the synchronization signal, the next synchronization base station in the signal radiation range continues to transmit the synchronization signal after detecting the synchronization signal, so that the synchronization signal can be diffused, and the positioning base station detecting the synchronization signal transmits or receives a positioning signal used for positioning, thereby expanding the base station capacity of the positioning system. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1Figure showing the application environment of the base station capacity expansion method of the positioning system in one embodiment;

[0042] Figure 2 Flow chart of the base station capacity expansion method of the positioning system in one embodiment;

[0043] Figure 3 Spatial distribution diagram of the positioning system in one embodiment;

[0044] Figure 4 Flow chart of the operation of the target synchronization base station in one embodiment;

[0045] Figure 5 Flow chart of the base station capacity expansion method of the positioning system in another embodiment;

[0046] Figure 6 Flow chart of the operation of the target positioning base station in one embodiment;

[0047] Figure 7 Schematic diagram of the allocation of synchronization time slots and positioning time slots in one embodiment;

[0048] Figure 8 Structural block diagram of the base station capacity expansion device of the positioning system in one embodiment;

[0049] Figure 9 Structural block diagram of the base station capacity expansion device of the positioning system in another embodiment;

[0050] Figure 10 Internal structural diagram of the base station in one embodiment. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0052] The base station capacity expansion method of the positioning system provided by the embodiments of the present application can be applied in the application environment as shown in Figure 1 The positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells of adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped. In Figure 1In the method, the other synchronization base station 102, the target synchronization base station 104, the positioning base station 106 and the device 108 communicate with each other through a network. The target synchronization base station 104 determines a first time period of a synchronization time slot to which the target synchronization base station 104 belongs in a synchronization period in response to detecting a synchronization signal transmitted by the other synchronization base station 102; and transmits the synchronization signal using different channels of at least three cells in the first time period, respectively. The synchronization signal is used to instruct the synchronization base station detecting the synchronization signal to transmit the synchronization signal, and is also used to instruct the positioning base station 106 detecting the synchronization signal to transmit or receive a positioning signal for positioning of the device 108. The device 108 can be a terminal, which can be but is not limited to various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things device can be a smart speaker, a smart television, a smart air conditioner, a smart vehicle-mounted device, a smart car and the like. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device and the like.

[0053] In one embodiment, as shown in Figure 2 A base station capacity expansion method of a positioning system is provided, the positioning system covering at least two minimum repeating units, each minimum repeating unit including a synchronization base station and at least three cells of adjacent and different channels, each cell including at least one positioning base station, the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units being overlapped. The method is applied to a target synchronization base station in Figure 1 The method includes the following steps:

[0054] Step S202, in response to detecting a synchronization signal transmitted by the other synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period.

[0055] Optionally, the positioning system covers at least two minimum repeating units arranged in sequence, each minimum repeating unit including a synchronization base station and three cells of adjacent and different channels. The cell, also known as a cellular cell, refers to an area covered by a base station or a part (sector antenna) of a base station in a cellular mobile communication system, and a mobile station in this area can reliably communicate with the base station through a wireless channel.

[0056] The synchronization base station (SBS, Synchronization Base Station) refers to a base station used for synchronization. The target synchronization base station refers to any synchronization base station in the positioning system except the reference synchronization base station. The base station synchronization base station is the synchronization base station serving as a reference in the synchronization process of each base station in the positioning system. The positioning base station (RBS, Range Base Station) refers to a base station used for positioning.

[0057] Synchronization refers to the time period that a synchronization base station determines the time slot for transmitting or receiving signals. A synchronization signal is a signal used for synchronizing the synchronization base station or the positioning base station. For example, the synchronization base station determines the time period of the time slot for transmitting the synchronization signal, and completes synchronization; the positioning base station determines the time period of the time slot for transmitting the positioning signal, and completes synchronization; the positioning base station determines the time period of the time slot for receiving the positioning signal, and completes synchronization.

[0058] The signal radiation range of the synchronization base station in each minimum repeating unit can cover the synchronization base stations in the adjacent minimum repeating units when the signal radiation range of the synchronization base station in each minimum repeating unit overlaps with the signal radiation range of the synchronization base station in the adjacent minimum repeating unit. Alternatively, the signal radiation range of the synchronization base station in each minimum repeating unit can also cover the synchronization base stations in a preset range, including the synchronization base stations in the adjacent minimum repeating units and the synchronization base stations in the non-adjacent minimum repeating units.

[0059] Figure 3 A spatial distribution diagram of a positioning system in one embodiment is shown. The positioning system includes at least two minimum repeating units, each minimum repeating unit including one synchronization base station and three cells with adjacent and different channels, the three cells having CH9 channel, CH8 channel and CH5 channel respectively, the synchronization base station being at the center of the minimum repeating unit, and the signal radiation range of the synchronization base station being able to cover the signals of the synchronization base stations in the adjacent minimum repeating units.

[0060] The positioning base stations in the same cell use the same channel, and the time slots can be allocated by time division multiplexing. Since the range of the cell is limited and the number of the positioning base stations in the cell is small, the coverage requirement can be met and the time slots in one positioning period can meet the use of the positioning base stations in the cell. In order to avoid interference, different channels are used for every two adjacent cells, and the time slots can be multiplexed in each cell, so that even if the signal radiation ranges of the base stations in the adjacent cells overlap, they will not interfere with each other. The positioning system combines the advantages of time division multiplexing and space division multiplexing, and introduces frequency division multiplexing, which improves the utilization rate of time slots and uses at least three channels to greatly reduce the probability of time slot collision, so that the positioning system can have unlimited base station capacity, and the coverage ability and base station capacity of the positioning system are no longer limited.

[0061] The time period that a base station occupies for transmitting or receiving signals is referred to as a time slot. The synchronization time slot is the time period that a synchronization base station occupies for transmitting a synchronization signal, and the positioning time slot is the time period that a positioning base station occupies for transmitting or receiving a positioning signal. A synchronization period can include a preset number of synchronization time slots, and each synchronization time slot is used for a synchronization base station to work.

[0062] Optionally, the positioning system pre-allocates the synchronization time slots of the synchronization base stations in the same synchronization period; the target synchronization base station continuously listens to the synchronization signals, and in response to detecting the synchronization signals transmitted by the other synchronization base stations, determines the first time period of the synchronization time slot to which the target synchronization base station belongs in the synchronization period.

[0063] The target synchronization base station or the target positioning base station does not work until the synchronization is completed, and only then enters the normal working state; otherwise, it continuously searches for the synchronization signals.

[0064] For example, if the synchronization time slot to which the target synchronization base station belongs in the synchronization period is the second time slot, then in response to detecting the synchronization signals transmitted by the other synchronization base stations, the target synchronization base station determines that the first time period of the synchronization time slot to which the target synchronization base station belongs in the synchronization period is 2 minutes and 15 seconds to 2 minutes and 20 seconds.

[0065] In step S204, the target synchronization base station transmits the synchronization signals using different channels of at least three cells in the first time period; the synchronization signals are used to instruct the synchronization base stations that detect the synchronization signals to transmit the synchronization signals, and are also used to instruct the positioning base stations that detect the synchronization signals to transmit or receive the positioning signals for positioning.

[0066] It can be understood that the channels of different cells are different, i.e., the frequencies of the channels used by different cells are different, and each minimum repeating unit in the positioning system multiplexes the same at least three cells, i.e., the positioning system uses frequency division multiplexing. Each minimum repeating unit includes at least three cells of different channels, which can ensure that the channels of every two adjacent cells are different.

[0067] For example, the minimum repeating unit includes three cells of adjacent and different channels, and the channels of the three cells are CH9, CH8, and CH5, respectively.

[0068] Optionally, when the current time reaches the first time period, the target synchronization base station transmits the synchronization signals using different channels of at least three cells.

[0069] The other synchronization base stations that have not been synchronized listen to the synchronization signals of different channels of at least three cells, synchronize in response to the synchronization signals, and transmit the synchronization signals after the synchronization is completed, which can spread the synchronization signals.

[0070] The positioning base stations can listen to the synchronization signals of the same channels of the cells in which they are located, synchronize in response to the synchronization signals, and transmit or receive the positioning signals for positioning after the synchronization is completed.

[0071] The base station capacity expansion method of the positioning system, the positioning system covers at least two minimum repeating units, each minimum repeating unit comprises a synchronous base station and at least three cells of adjacent and different channels, each cell comprises at least one positioning base station, the signal radiation range of the synchronous base station between adjacent minimum repeating units is overlapped; the target synchronous base station determines the first time period of the synchronous time slot to which the target synchronous base station belongs in the synchronization period in response to detecting the synchronization signal emitted by the other synchronous base station, and the target synchronous base station emits the synchronization signal using the different channels of the at least three cells respectively within the first time period; that is, the target synchronous base station continues to emit the synchronization signal within the signal radiation range after responding to the detection of the synchronization signal, the next synchronous base station within the signal radiation range continues to emit the synchronization signal after detecting the synchronization signal, so that the synchronization signal can be diffused, and then the positioning base station detecting the synchronization signal emits or receives the positioning signal for positioning, thereby expanding the base station capacity of the positioning system.

[0072] In one embodiment, as shown in Figure 4 the target synchronous base station continues to listen to the synchronization signal after being powered on until a frame of synchronization signal is received to determine the first time period of the synchronous time slot to which the target synchronous base station belongs in the synchronization period, and synchronization is completed; in the case that the current time reaches the first time period, the target synchronous base station emits the synchronization signal and enters sleep to wait for the arrival of the next period. After the arrival of the next period, the target synchronous base station switches to the next channel and repeats the listening to the synchronization signal.

[0073] It should be noted that the target synchronous base station needs to be forced to synchronize when it is powered on for the first time.

[0074] In one embodiment, in response to detecting the synchronization signal emitted by the other synchronous base station, the first time period of the synchronous time slot to which the target synchronous base station belongs in the synchronization period is determined, comprising: in response to detecting the synchronization signal emitted by the other synchronous base station, determining the grade number of each synchronization signal; the grade number represents the distance between the synchronous base station emitting the synchronization signal and the reference synchronous base station in the positioning system; based on the grade number of each synchronization signal, determining the target synchronization signal from each synchronization signal; and according to the target synchronization signal, determining the first time period of the synchronous time slot to which the target synchronous base station belongs in the synchronization period.

[0075] The grade number represents the distance between the synchronous base station emitting the synchronization signal and the reference synchronous base station in the positioning system; wherein the reference synchronous base station has the highest grade; the smaller the distance between the synchronous base station emitting the synchronization signal and the reference synchronous base station, the higher the grade of the synchronous base station emitting the synchronization signal. It should be noted that the reference synchronous base station does not need to listen to the synchronization signal of the other synchronous base station, and can periodically emit the synchronization signal in the at least three channels respectively.

[0076] Optionally, the level of the synchronization base station is negatively correlated with the level number. For example, the level number of the reference synchronization base station is SBS0, and the level number of the synchronization base station adjacent to the reference synchronization base station can be SBS1, SBS2, and so on.

[0077] Optionally, the target synchronization signal is determined from the synchronization signals based on the level numbers of the synchronization signals, including: determining the synchronization signal transmitted by the synchronization base station closest to the reference synchronization base station as the target synchronization signal from the synchronization signals based on the level numbers of the synchronization signals.

[0078] If the target synchronization base station detects one synchronization signal, the synchronization signal is taken as the target synchronization signal; if the target synchronization base station detects at least two synchronization signals, the synchronization signal with the highest level is determined as the target synchronization signal from the synchronization signals; wherein the synchronization signal with the highest level is the synchronization signal transmitted by the synchronization base station closest to the reference synchronization base station.

[0079] If the levels of the synchronization signals are the same, that is, the level numbers of the synchronization signals are the same, one of the synchronization signals can be randomly determined as the target synchronization signal.

[0080] Optionally, the first time period of the synchronization time slot to which the target synchronization base station belongs in the synchronization period is determined according to the target synchronization signal, including: determining the first time period according to the synchronization time slot in which the synchronization base station transmitting the target synchronization signal is located in the synchronization period, and the synchronization time slot to which the target synchronization base station belongs in the synchronization period.

[0081] Optionally, the target synchronization base station determines the time difference between the synchronization time slot in which the synchronization base station transmitting the target synchronization signal is located in the synchronization period, and the synchronization time slot to which the target synchronization base station belongs in the synchronization period, adds the time difference to the time when the target synchronization signal is detected, to determine the time when the target synchronization base station transmits the synchronization signal, and determines the first time period of the synchronization time slot according to the time when the synchronization signal is transmitted.

[0082] For example, the target synchronization base station detects the target synchronization signal, determines that the synchronization time slot in which the synchronization base station transmitting the target synchronization signal is located in the synchronization period is the first synchronization time slot, and the synchronization time slot to which the target synchronization base station belongs in the synchronization period is the third synchronization time slot, then the time difference between the first synchronization time slot and the third time slot is the time length of two time slots, and the target synchronization base station can add the time length of the two time slots to the time when the target synchronization signal is detected, to determine the time when the target synchronization base station transmits the synchronization signal, and the first time period of the synchronization time slot in which the target synchronization base station is located can be determined according to the time when the synchronization signal is transmitted.

[0083] The target synchronization base station determines a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period, completes synchronization, and generates a level number of the target synchronization base station according to a level number of the target synchronization signal. Optionally, the target synchronization base station takes a lower level number of the level number of the target synchronization signal as the level number of the target synchronization base station.

[0084] For example, each synchronization base station maintains a level number, the level number of the reference synchronization base station is SBS0, if the target synchronization base station synchronizes according to the level number SBS0, the level number of the target synchronization base station is SBS1; if the target synchronization base station synchronizes according to the level number SBS1, the level number of the target synchronization base station is SBS2, and so on, the level number of the synchronization base station that synchronizes according to the level number SBSn is SBSn+1, which can ensure that each synchronization base station directly or indirectly synchronizes with the reference synchronization base station. Therefore, there can be synchronization base stations with the same level number.

[0085] In this embodiment, the target synchronization base station can accurately determine the first time period according to the synchronization time slot in which the synchronization base station that transmits the target synchronization signal is located in the synchronization period, and the synchronization time slot to which the target synchronization base station belongs, and can transmit the synchronization signal in the first time period, thereby improving the accuracy of synchronization of base stations in the positioning system.

[0086] In one embodiment, each minimum repeating unit includes three cells of adjacent and different channels, the first time period includes three positioning periods corresponding to different channels of the three cells respectively; and in the first time period, the synchronization signal is transmitted using different channels of at least three cells respectively, including: in the first time period, the synchronization signal is transmitted using corresponding channels according to the order of the three positioning periods; and wherein the positioning base station in the cell of one of the channels in the minimum repeating unit detects the synchronization signal of the same channel.

[0087] Each minimum repeating unit includes three cells of adjacent and different channels, which can ensure that the channels of every two adjacent cells in the positioning system are different, and can avoid signal interference between adjacent cells.

[0088] It can be understood that the positioning system includes three different channels, and the target synchronization base station transmits the synchronization signal using the three different channels respectively, so that the first time period includes three positioning periods corresponding to the three different channels respectively; in the first time period, the target synchronization base station transmits the synchronization signal using corresponding channels according to the order of the three positioning periods; and wherein the positioning base station in the cell of one of the channels in the minimum repeating unit detects the synchronization signal of the same channel.

[0089] In the embodiment, the target synchronization base station transmits the synchronization signals using different channels of the at least three cells in the first time period, and the positioning base station in one of the cells can detect the synchronization signals of the same channel, so that the positioning base station can transmit or receive the positioning signals using the channel, signal interference can be avoided, and positioning can be more accurately performed.

[0090] In one embodiment, as shown in Figure 5 , a base station capacity expansion method of a positioning system is provided, the positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells with adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations in adjacent minimum repeating units overlap; the method is applied to a target positioning base station in Figure 1 , and the method includes the following steps.

[0091] In step S502, a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period is determined in response to a detected synchronization signal transmitted by a synchronization base station. The synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects a synchronization signal transmitted by another synchronization base station.

[0092] Optionally, the positioning system pre-allocates the positioning time slots of the positioning base stations in each positioning period; the target positioning base station continuously listens to the synchronization signals, and determines the second time period of the positioning time slot to which the target positioning base station belongs in the positioning period in response to a detected synchronization signal transmitted by a synchronization base station.

[0093] For example, the positioning time slot to which the target positioning base station belongs in the positioning period is the third time slot, and the target positioning base station determines that the second time period of the positioning time slot to which the target positioning base station belongs in the positioning period is 3 minutes and 5 seconds to 3 minutes and 6 seconds in response to a detected synchronization signal transmitted by a synchronization base station.

[0094] It can be understood that the target positioning base station can detect the synchronization signal transmitted by the synchronization base station of the minimum repeating unit in which the target positioning base station is located, or the positioning signal transmitted by the synchronization base station of another minimum repeating unit, which is not limited herein.

[0095] In step S504, a positioning signal is transmitted or received in the second time period; the positioning signal is used for positioning.

[0096] Optionally, the positioning signal is transmitted or received at a target time in the second time period. The target time can be set as needed, or is a random time in the second time period, which is not limited herein.

[0097] Optionally, the positioning system can be one of the Downlink-TdoA, Uplink-TdoA, or ToA positioning systems.

[0098] If the positioning system is a Downlink-TdoA positioning system, the target positioning base station will transmit a positioning signal during the second time period. The positioning signal is used by the device to locate itself. The device can calculate its current location information through the positioning signal.

[0099] If the positioning system is an Uplink-TdoA positioning system, the target positioning base station receives the positioning signal during the second time period; the target positioning base station can send the positioning signal to the control system for calculation to obtain the device's location information.

[0100] If the positioning system is a ToA positioning system, the target positioning base station receives the positioning signal in the second time period and then feeds back the positioning signal to the device. The device can then calculate the device's location information based on the transmitted and received positioning signals.

[0101] The device can be a terminal device or other device, and there is no limitation on it.

[0102] The base station capacity expansion method of the above-mentioned positioning system covers at least two minimum repeating units. Each minimum repeating unit includes a synchronous base station and at least three adjacent cells with different channels. Each cell includes at least one positioning base station. The signal radiation ranges of the synchronous base stations between adjacent minimum repeating units overlap. In response to detecting a synchronization signal transmitted by a synchronous base station, the target positioning base station determines the second time period of the positioning time slot to which it belongs in the positioning cycle. The synchronization signal transmitted by the synchronous base station is transmitted when the synchronous base station detects the synchronization signal transmitted by other synchronous base stations. That is, the synchronization signal is spread through each adjacent synchronous base station. Then, the positioning base station that detects the synchronization signal transmits or receives the positioning signal for positioning, thereby expanding the base station capacity of the positioning system.

[0103] In one embodiment, such as Figure 6 As shown, after the target positioning base station is powered on, it continuously listens to the synchronization signal until it receives a frame of synchronization signal. Then it determines the second time period of the positioning time slot to which the target positioning base station belongs in the positioning cycle and completes the synchronization. When the second time period arrives at the current time, the target positioning base station transmits or receives the positioning signal and then enters sleep mode to wait for the next cycle.

[0104] It should be noted that the target positioning base station needs to be forcibly synchronized on the first power-on.

[0105] In one embodiment, the second time period of the positioning time slot to which the target positioning base station belongs in the positioning period is determined in response to the detected synchronization signal transmitted by the synchronization base station, comprising: determining the second time period in response to the detected synchronization signal transmitted by the synchronization base station, according to the preset time slot in which the time of detecting the synchronization signal is located in the positioning period, and the positioning time slot to which the target positioning base station belongs in the positioning period.

[0106] Optionally, the target positioning base station determines the second time period in response to the detected synchronization signal transmitted by the synchronization base station, according to the first positioning time slot in which the time of detecting the synchronization signal is located in the positioning period, and the relationship between the positioning time slot to which the target positioning base station belongs in the positioning period and the first positioning time slot.

[0107] It can be understood that the first positioning time slot in the positioning period is occupied by the synchronization base station for transmitting the synchronization signal. Then, when the target positioning base station detects the synchronization signal transmitted by the synchronization base station, the time of detecting the synchronization signal is located in the first positioning time slot, and then the target positioning base station can determine the time difference between the first positioning time slot and the positioning time slot to which it belongs. The time of detecting the synchronization signal is added to the time difference, and the second time period can be determined.

[0108] For example, if the time slot number of the first positioning time slot is 1 and the time slot number of the positioning time slot to which the target positioning base station belongs is 2, the time difference between the positioning time slot to which the target positioning base station belongs and the first positioning time slot is the time length of one time slot. If the time of detecting the synchronization signal by the target positioning base station is 2 minutes and 5 seconds, the time of detecting the synchronization signal is added to the time length of one time slot, and the time in the second time period is obtained, so that the second time period can be determined.

[0109] In one embodiment, after transmitting or receiving the positioning signal in the second time period, it further comprises: if the synchronization signal is not detected in the preset time slot of the next positioning period, determining the second time period of the positioning time slot to which the target positioning base station belongs in the next positioning period based on the second time period in the previous positioning period and the time length of the positioning period, and performing the step of transmitting or receiving the positioning signal in the second time period.

[0110] Optionally, the positioning period comprises a first positioning time slot and at least one second positioning time slot, the synchronization base station transmits the synchronization signal in the first positioning time slot, the second positioning time slot is used for the positioning base station to transmit the positioning signal, and the positioning time slot to which the target positioning base station belongs belongs to the second positioning time slot.

[0111] The target positioning base station can detect the synchronization signal in the first positioning time slot, or can not detect the synchronization signal. The first positioning time slot can be the first time slot in the positioning period, and the second positioning time slot can be the time slot after the first time slot in the positioning period.

[0112] If a synchronization signal is detected within the preset time slot, the second time period of the positioning time slot to which the target positioning base station belongs in the positioning cycle is determined in response to the detected synchronization signal transmitted by the synchronization base station; if no synchronization signal is detected within the preset time slot, the duration of one positioning cycle is added to the second time period of the previous positioning cycle to determine the second time period of the positioning time slot to which the target positioning base station belongs in the next positioning cycle.

[0113] For example, if the target positioning base station does not detect a synchronization signal in the first positioning time slot of the current positioning cycle, the second time slot in the previous positioning cycle is determined to be 2 minutes 5 seconds to 2 minutes 6 seconds. The duration of a positioning cycle is 7 seconds. Then, the second time slot of the positioning time slot to which the target positioning base station belongs in the current positioning cycle is 2 minutes 12 seconds to 2 minutes 13 seconds.

[0114] In this embodiment, if the target positioning base station does not detect a synchronization signal within a preset time slot, it can accurately determine the second time slot of the target positioning base station in the next cycle based on the second time slot in the previous positioning cycle and the duration of the positioning cycle. This allows for more accurate transmission or reception of positioning signals during the second time slot, thereby enabling more accurate positioning.

[0115] In one embodiment, such as Figure 7 As shown, a positioning cycle is divided into seven time slots (RANGE SYNC). The first positioning slot (RANGE SYNC) is used to transmit synchronization signals and is occupied by the synchronization base station. This means that not all positioning slots are allocated to the positioning base station. The other six positioning slots (RANGE LSOT 1-6) are occupied by the positioning base station, which transmits positioning signals within its assigned slot. The time outside the allocated positioning slots within the positioning cycle is called idle time (RANGE IDLE). During idle time slots, the positioning base station does not operate and can sleep to save power, waiting for the next cycle. It is understandable that the allocation of positioning slots within this positioning cycle is the same for cells on different channels.

[0116] If we define the duration of a positioning period as T, since each synchronization base station needs to use three channels to transmit synchronization signals, the length of a synchronization time slot is 3*T. For example, a synchronization base station uses channel CH9 to transmit synchronization signals in the first positioning period, channel CH8 in the second positioning period, and channel CH5 in the third positioning period. That is, one synchronization time slot is equivalent to the duration of three positioning periods.

[0117] If one of the seven synchronization base stations is taken as the center, the other six synchronization base stations are evenly distributed near the radiation boundary of the synchronization base station, so the seven synchronization base stations need to occupy seven synchronization time slots to form a synchronization period. In the synchronization period, the seven synchronization base stations take turns to use three channels to transmit synchronization signals, so the length of a synchronization period is 21*T.

[0118] Assuming that a positioning period T=100ms (milliseconds), the length of a synchronization period is 2.1s (seconds), so a synchronization base station or a positioning base station can complete a synchronization update every 2.1s.

[0119] Assuming that the length of a positioning time slot is 1ms, the clock of the base station needs to meet the requirement that the drift length is less than 1ms in the synchronization period 2.1s to work normally. The time drift is caused by the inaccuracy of the clock, for example, the base station should start a new period at eight o'clock, but it starts at eight thirty half an hour later, so it misses several time slots in front.

[0120] It can be understood that there is a difference between the clocks of the base stations, in order to ensure that the positioning system can work normally, the difference needs to be controlled, that is, the drift length of each base station needs to be controlled to be less than the length of the positioning time slot.

[0121] In an embodiment, a positioning system is provided, the positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells of adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units overlap; wherein the synchronization base station is configured to determine a first time period of a synchronization time slot in a synchronization period in response to detecting a synchronization signal transmitted by another synchronization base station; transmit a synchronization signal using different channels of the at least three cells respectively in the first time period; the positioning base station is configured to determine a second time period of a positioning time slot in a positioning period in response to detecting a synchronization signal transmitted by the synchronization base station; transmit or receive a positioning signal in the second time period; and the positioning signal is used for positioning.

[0122] Optionally, the power of the positioning base station is lower than a preset power threshold, so that the signal radiation ranges of the positioning base stations corresponding to the same channel between adjacent minimum repeating units do not overlap; and the power of the synchronization base station is higher than or equal to the preset power threshold, so that the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units overlap.

[0123] The preset power threshold can be set as needed.

[0124] It can be understood that the power of the positioning base station is lower than the preset power threshold, so that the signal radiation ranges of the positioning base stations corresponding to the same channels between adjacent minimum repeating units do not overlap, thereby avoiding the problem that the signal radiation of the positioning base station causes signal conflict in the same channel cells of adjacent minimum repeating units; the power of the synchronization base station is higher than or equal to the preset power threshold, so that the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units overlap, and then the synchronization base station can transmit the synchronization signal after detecting the synchronization signal transmitted by the synchronization base station in the adjacent minimum repeating unit, so that the synchronization signal can be diffused, and the base station capacity of the positioning system can be expanded.

[0125] It should be understood that although each step in the flowchart involved in each of the above-described embodiments is shown in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or stages.

[0126] Based on the same inventive concept, the embodiments of the present application also provide a base station capacity expansion device of a positioning system for implementing the above-mentioned base station capacity expansion method of the positioning system. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, and therefore the specific limitations in one or more base station capacity expansion device embodiments of the positioning system provided below can refer to the limitations of the base station capacity expansion method of the positioning system described above, which will not be described here.

[0127] In one embodiment, as shown in Figure 8 A base station capacity expansion device of a positioning system is provided, the positioning system covering at least two minimum repeating units, each minimum repeating unit including a synchronization base station and at least three cells of adjacent and different channels, each cell including at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units overlapping; the device is applied to a target synchronization base station, and the device includes a first determination module 802 and a transmission module 804, wherein:

[0128] The first determination module 802 is configured to determine a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to detecting a synchronization signal transmitted by another synchronization base station.

[0129] The transmitting module 804 is configured to transmit the synchronization signal using different channels of the at least three cells respectively in the first time period; the synchronization signal is used to instruct a synchronization base station detecting the synchronization signal to transmit the synchronization signal, and the synchronization signal is also used to instruct a positioning base station detecting the synchronization signal to transmit or receive a positioning signal for positioning.

[0130] The base station capacity expansion device of the positioning system covers at least two minimum repeating units, each of which includes a synchronization base station and at least three cells of adjacent and different channels, each of which includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations of adjacent minimum repeating units overlap; a target synchronization base station determines a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to detecting a synchronization signal transmitted by another synchronization base station, and transmits the synchronization signal using different channels of the at least three cells respectively in the first time period; that is, if the target synchronization base station continues to transmit the synchronization signal in the signal radiation range after detecting the synchronization signal, the next synchronization base station in the signal radiation range continues to transmit the synchronization signal after detecting the synchronization signal, so that the synchronization signal can be diffused, and then the positioning base station detecting the synchronization signal transmits or receives a positioning signal for positioning, thereby expanding the base station capacity of the positioning system.

[0131] In one embodiment, the first determining module 802 is further configured to determine a level number of each synchronization signal in response to detecting the synchronization signal transmitted by another synchronization base station; the level number represents the distance between the synchronization base station transmitting the synchronization signal and a reference synchronization base station in the positioning system; and the target synchronization signal is determined from the synchronization signals based on the level numbers of the synchronization signals; and the first time period of the synchronization time slot to which the target synchronization base station belongs in the synchronization period is determined according to the target synchronization signal.

[0132] In one embodiment, the first determining module 802 is further configured to determine the synchronization signal transmitted by the synchronization base station closest to the reference synchronization base station from the synchronization signals based on the level numbers of the synchronization signals as the target synchronization signal.

[0133] In one embodiment, the first determining module 802 is further configured to determine the first time period according to the synchronization time slot in which the synchronization base station transmitting the target synchronization signal is located in the synchronization period and the synchronization time slot to which the target synchronization base station belongs in the synchronization period.

[0134] In one embodiment, each minimum repeating unit includes three adjacent cells with different channels, and the first time period includes the positioning period corresponding to the different channels of the three cells respectively; the above-mentioned transmission module 804 is further configured to transmit synchronization signals using the corresponding channels according to the order of the three positioning periods during the first time period; wherein, the positioning base station in the cell of the minimum repeating unit that is in one of the channels detects the synchronization signal of the same channel.

[0135] In one embodiment, such as Figure 9 As shown, a base station capacity expansion device for a positioning system is provided. The positioning system covers at least two minimum repeating units, each minimum repeating unit including a synchronous base station and at least three adjacent cells with different channels. Each cell includes at least one positioning base station, and the signal radiation ranges of the synchronous base stations between adjacent minimum repeating units overlap. The device is applied to a target positioning base station and includes: a second determining module 902 and a transceiver module 904, wherein:

[0136] The second determining module 902 is used to determine the second time period of the positioning time slot to which the target positioning base station belongs in the positioning cycle in response to the detected synchronization signal transmitted by the synchronization base station; the synchronization signal transmitted by the synchronization base station is transmitted when the synchronization base station detects the synchronization signal transmitted by other synchronization base stations.

[0137] The transceiver module 904 is used to transmit or receive positioning signals during the second time period; the positioning signals are used for positioning.

[0138] The aforementioned base station capacity expansion device for the positioning system covers at least two minimum repeating units. Each minimum repeating unit includes a synchronization base station and at least three adjacent cells with different channels. Each cell includes at least one positioning base station. The signal radiation ranges of the synchronization base stations between adjacent minimum repeating units overlap. In response to detecting a synchronization signal transmitted by a synchronization base station, the target positioning base station determines the second time period of the positioning time slot to which it belongs in the positioning cycle. The synchronization signal transmitted by the synchronization base station is transmitted when the synchronization base station detects synchronization signals transmitted by other synchronization base stations, that is, the synchronization signal is spread through each adjacent synchronization base station. Then, the positioning base station that detects the synchronization signal transmits or receives the positioning signal for positioning, thereby expanding the base station capacity of the positioning system.

[0139] In one embodiment, the second determining module 902 is further configured to determine the second time period of the positioning time slot to which the target positioning base station belongs in the next positioning cycle based on the second time period in the previous positioning cycle and the duration of the positioning cycle if no synchronization signal is detected in the preset time slot of the next positioning cycle. The transceiver module 904 is further configured to transmit or receive positioning signals during the second time period.

[0140] In one embodiment, the positioning period comprises a first positioning time slot and at least one second positioning time slot, the synchronization base station transmits the synchronization signal in the first positioning time slot, and the second positioning time slot is used for positioning base stations to transmit positioning signals, and the positioning time slot to which the target positioning base station belongs is the second positioning time slot.

[0141] The modules in the base station capacity expansion apparatus of the positioning system can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in the base station in hardware, or stored in a memory in the base station in software, so as to be invoked and executed by the processor to perform the operations corresponding to the modules.

[0142] In one embodiment, a base station, which can be a target synchronization base station or a target positioning base station, has an internal structure as shown in Figure 10 The base station comprises a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the base station is configured to provide computing and control capabilities. The memory of the base station comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium. The database of the base station is configured to store signals, time slots, and other data. The input / output interface of the base station is configured to exchange information between the processor and external devices. The communication interface of the base station is configured to communicate with external terminals through a network connection. The computer program is executed by the processor to implement a base station capacity expansion method of a positioning system.

[0143] Those skilled in the art can understand that the structure shown in Figure 10 is only a block diagram of part of the structure related to the scheme of the present application, and does not limit the base station to which the scheme of the present application is applied. The specific base station can comprise more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0144] The embodiments of the present application also provide a computer readable storage medium. One or more non-volatile computer readable storage media storing computer executable instructions, when the computer executable instructions are executed by one or more processors, cause the processors to perform the steps of the base station capacity expansion method of a positioning system.

[0145] The embodiments of the present application also provide a computer program product comprising instructions, which, when executed on a computer, cause the computer to perform the base station capacity expansion method of a positioning system.

[0146] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of the country and region.

[0147] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of each method can be included. In the embodiments provided in the present application, any reference to memory, database or other medium can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetic variable memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric memory (Ferroelectric Random Access Memory, FRAM), phase change memory (Phase Change Memory, PCM), graphene memory, etc. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0148] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0149] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of base station capacity expansion for a positioning system, characterized by, The positioning system covers at least two minimum repeating units, each minimum repeating unit comprises a synchronization base station and at least three cells of adjacent and different channels, each cell comprises at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped; The method is applied to a target synchronization base station, and the method comprises: in response to detecting a synchronization signal transmitted by another synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period; in the first time period, transmitting the synchronization signal using different channels of the at least three cells respectively; the synchronization signal is used to instruct a synchronization base station detecting the synchronization signal to transmit the synchronization signal, and the synchronization signal is also used to instruct a positioning base station detecting the synchronization signal to transmit or receive a positioning signal used for positioning.

2. The method of claim 1, wherein, The response to detecting a synchronization signal transmitted by another synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period, comprises: in response to detecting a synchronization signal transmitted by another synchronization base station, determining a level number of each synchronization signal; the level number represents a distance between a synchronization base station transmitting the synchronization signal and a reference synchronization base station in the positioning system; based on the level number of each synchronization signal, determining a target synchronization signal from the synchronization signals; based on the target synchronization signal, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period.

3. The method of claim 2, wherein, The response to detecting a synchronization signal transmitted by another synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period, comprises: based on the level number of each synchronization signal, determining a target synchronization signal from the synchronization signals; 4. The method of claim 2, wherein, based on the target synchronization signal, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period. The response to detecting a synchronization signal transmitted by another synchronization base station, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period, comprises:

5. The method of claim 1, wherein, based on the target synchronization signal, determining a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period. Each minimum repeating unit comprises three cells of adjacent and different channels, and the first time period comprises three positioning periods corresponding to the different channels of the three cells respectively; the transmission of the synchronization signal using different channels of the at least three cells respectively in the first time period comprises:

6. A method of base station capacity expansion for a positioning system, characterized by, in the first time period, the synchronization signal is transmitted using corresponding channels according to the order of the three positioning periods; wherein a positioning base station in a cell of one channel in the minimum repeating unit detects the synchronization signal of the same channel. The positioning system covers at least two minimum repeating units, each minimum repeating unit comprises a synchronization base station and at least three cells of adjacent and different channels, each cell comprises at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped; The method is applied to a target positioning base station, and the method comprises: determining a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period in response to the detected synchronization signal transmitted by the synchronization base station; the synchronization signal transmitted by the synchronization base station is transmitted in a case where the synchronization base station detects the synchronization signal transmitted by another synchronization base station; transmitting or receiving a positioning signal in the second time period; the positioning signal is used for positioning.

7. The method of claim 6, wherein, The step of transmitting or receiving the positioning signal in the second time period is further performed after the step of transmitting or receiving the positioning signal in the second time period. If the synchronization signal is not detected in a preset time slot of a next positioning period, a second time period of a positioning time slot to which the target positioning base station belongs in the next positioning period is determined based on a second time period in a previous positioning period and a length of the positioning period, and the step of transmitting or receiving the positioning signal in the second time period is performed.

8. The method of claim 7, wherein, The positioning period includes a first positioning time slot and at least one second positioning time slot, the synchronization signal is transmitted by the synchronization base station in the first positioning time slot, the second positioning time slot is used for the positioning base station to transmit a positioning signal, and the positioning time slot to which the target positioning base station belongs belongs to the second positioning time slot.

9. A positioning system, characterized by The positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells of adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped; wherein, The synchronization base station is configured to determine a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to the detected synchronization signal transmitted by another synchronization base station; and transmit the synchronization signal using different channels of at least three cells in the first time period, respectively. The positioning base station is configured to determine a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period in response to the detected synchronization signal transmitted by the synchronization base station; and transmit or receive a positioning signal in the second time period; the positioning signal is used for positioning.

10. The positioning system of claim 9, wherein, The power of the positioning base station is lower than a preset power threshold, so that the signal radiation ranges of the positioning base stations corresponding to the same channel between adjacent minimum repeating units are not overlapped; and the power of the synchronization base station is higher than or equal to the preset power threshold, so that the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped.

11. A base station capacity expansion apparatus for a positioning system, characterized by comprising: The positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells of adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations between adjacent minimum repeating units are overlapped; The device is applied to a target synchronization base station, and the device includes: A first determining module is configured to determine a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to the detected synchronization signal transmitted by another synchronization base station. The first determining module is configured to determine a first time period of a synchronization time slot to which the target synchronization base station belongs in a synchronization period in response to the detected synchronization signal transmitted by another synchronization base station. The transmitting module is configured to transmit the synchronization signal using different channels of at least three cells respectively in the first time period; the synchronization signal is used to indicate that a synchronization base station detecting the synchronization signal transmits the synchronization signal, and the synchronization signal is also used to indicate that a positioning base station detecting the synchronization signal transmits or receives a positioning signal used for positioning.

12. A base station capacity expansion apparatus for a positioning system, characterized by comprising: The positioning system covers at least two minimum repeating units, each minimum repeating unit includes a synchronization base station and at least three cells of adjacent and different channels, each cell includes at least one positioning base station, and the signal radiation ranges of the synchronization base stations in adjacent minimum repeating units overlap; The device is applied to a target positioning base station, and the device includes: The second determining module is configured to determine a second time period of a positioning time slot to which the target positioning base station belongs in a positioning period in response to the synchronization signal transmitted by the detected synchronization base station; the synchronization signal transmitted by the synchronization base station is transmitted in the case that the synchronization base station detects the synchronization signal transmitted by another synchronization base station; The transceiving module is configured to transmit or receive a positioning signal in the second time period; the positioning signal is used for positioning.

13. A base station comprising a memory and a processor, the memory having stored therein a computer program, the base station being characterized by: The computer program, when executed by the processor, causes the processor to perform the steps of the base station capacity expansion method of the positioning system according to any one of claims 1 to 8.

14. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by the processor, implements the steps of the method according to any one of claims 1 to 8.

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