WO2019153140A1 - Procédé et dispositif de positionnement - Google Patents

Procédé et dispositif de positionnement Download PDF

Info

Publication number
WO2019153140A1
WO2019153140A1 PCT/CN2018/075625 CN2018075625W WO2019153140A1 WO 2019153140 A1 WO2019153140 A1 WO 2019153140A1 CN 2018075625 W CN2018075625 W CN 2018075625W WO 2019153140 A1 WO2019153140 A1 WO 2019153140A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
terminal
measurement result
geographic coordinate
source base
Prior art date
Application number
PCT/CN2018/075625
Other languages
English (en)
Chinese (zh)
Inventor
邢平平
张鸿翼
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2018/075625 priority Critical patent/WO2019153140A1/fr
Publication of WO2019153140A1 publication Critical patent/WO2019153140A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node

Definitions

  • the present application relates to the field of communications, and in particular, to a positioning method and device.
  • the terminal can be located using a carrier-phase kinematic (RTK) technique.
  • RTK carrier-phase kinematic
  • the terminal may be allocated a reference station, and the terminal and the reference station respectively measure the carrier phase of the satellite signal, and perform a complicated operation process according to the measurement results of the reference station and the terminal to determine the geographic coordinates of the terminal.
  • one base station closest to the terminal can be used as the base station of the terminal, or a base station can be virtualized in the vicinity of the terminal.
  • the terminal may calculate a geographic coordinate according to the measurement result of the terminal and the measurement result of the reference station, and when the terminal leaves the cell of the reference station and enters the cell of another reference station, according to the The measurement result of the newly accessed base station and the measurement result of the terminal are calculated, and the geographical coordinates of the terminal are calculated.
  • This process takes ten seconds or even ten minutes. That is to say, after the terminal switches the cell, the operation of the terminal is first performed to determine the geographical coordinates of the terminal, so that the continuity of the high-precision positioning service cannot be guaranteed.
  • the embodiment of the invention provides a positioning method and device, which can ensure the continuity of the high-precision positioning service when the cell is switched.
  • a positioning method comprising: obtaining a first measurement result of a source base station on a satellite signal, a second measurement result of a target base station on a satellite signal, and a terminal to satellite when determining that the terminal will move out of the source base station service range
  • the third measurement of the signal is a base station that is accessed after the terminal leaves the source base station.
  • the first geographic coordinate of the terminal may be calculated according to the first measurement result and the third measurement result
  • the second geographic coordinate of the terminal is calculated according to the second measurement result and the third measurement result; finally, according to the first geographic coordinate and/or The second geographic coordinate determines a positioning result within a preset duration after the terminal accesses the target base station.
  • the measurement data is accumulated for a certain period of time, and the terminal coordinates calculated according to the measurement data can achieve the positioning accuracy before the terminal is switched.
  • the method provided by the present invention can process the measurement results of the source base station and the target base station in parallel when the terminal is in the service range of the source base station, and use the previously calculated time period after the terminal switches to the target base station.
  • the geographical coordinates determine the positioning result of the terminal to ensure the continuity of the positioning service.
  • the positioning service is not affected by the frequent handover of the cell by the terminal, and the transition is smooth when the terminal switches the cell to ensure the continuity of the positioning service.
  • determining that the terminal is to leave the service range of the source base station includes: determining that the terminal is located in an edge area of the source base station service range, and the moving direction of the terminal is far from the source
  • the base station service range determines the range of services that the terminal will leave the source base station.
  • determining the positioning result according to the first geographic coordinate and/or the second geographic coordinate comprises: Determining, by the first geographic coordinate and the second geographic coordinate, a third geographic coordinate, determining a geographic location corresponding to the third geographic coordinate as a positioning result; or determining a broadcast signal to noise ratio of the first measurement result that is higher than the second measurement result For example, determining a geographic location corresponding to the first geographic coordinate is a positioning result; or determining that the moving direction of the terminal is away from the source base station and close to the target base station, determining that the geographical location corresponding to the second geographic coordinate is the positioning result.
  • a new coordinate can be calculated according to the first geographic coordinate and the second geographic coordinate as the positioning coordinate of the terminal.
  • the first geographic coordinate or the second geographic coordinate may be used as the positioning coordinate of the terminal.
  • the method further includes: obtaining a fourth measurement result of the target base station to the satellite signal, and if the positioning result determined according to the fourth measurement result satisfies the preset accuracy, stopping acquiring the measurement result of the source base station on the satellite signal.
  • the measurement result of the satellite signal by the source base station is not acquired in the subsequent process.
  • the method further includes: obtaining a fourth measurement result of the target base station on the satellite signal and a fifth measurement result of the source base station on the satellite signal; determining that the broadcast signal to noise ratio of the fifth measurement result is lower than a preset threshold, updating the positioning according to the fourth measurement result As a result, the measurement of the satellite signal by the source base station is stopped.
  • an apparatus including: a determining unit, configured to determine that a terminal will move out of a source base station service range; and an acquiring unit, configured to acquire a source base station to a satellite signal when the determining unit determines that the terminal will move out of the source base station service range
  • the target base station is a base station that is accessed after the terminal leaves the source base station
  • the positioning unit is configured to use the first measurement result according to the first measurement result
  • the positioning unit is further configured to determine, according to the first geographic coordinate and/or the second geographic coordinate The positioning result within the preset duration after the terminal accesses the target base station.
  • the measurement data is accumulated for a certain period of time, and the terminal coordinates calculated according to the measurement data can achieve the positioning accuracy before the terminal is switched.
  • the device provided by the present invention can process the measurement results of the source base station and the target base station in parallel when the terminal is in the service range of the source base station, and use the previously calculated time period after the terminal switches to the target base station.
  • the geographical coordinates determine the positioning result of the terminal to ensure the continuity of the positioning service.
  • the positioning service is not affected by the frequent handover of the cell by the terminal, and the transition is smooth when the terminal switches the cell to ensure the continuity of the positioning service.
  • the determining unit is specifically configured to: determine that the terminal is located in an edge area of the source base station service range, and the moving direction of the terminal is away from the source base station service range, and then determine The terminal will leave the service range of the source base station.
  • the positioning unit is configured to determine, according to the first geographic coordinate and the second geographic coordinate, the third Geographical coordinates, determining a geographic location corresponding to the third geographic coordinate as a positioning result; or determining a geographic signal to noise ratio of the first measurement result that is higher than a second measurement result, determining a geographic location corresponding to the first geographic coordinate For determining the result of the positioning; or determining that the moving direction of the terminal is away from the source base station and close to the target base station, determining the geographical location corresponding to the second geographic coordinate is the positioning result.
  • the acquiring unit is further configured to: in the positioning unit, according to the first geographic coordinate and/or After the geographic coordinates determine the positioning result, the fourth measurement result of the target base station to the satellite signal is obtained; if the positioning result determined by the positioning unit according to the fourth measurement result satisfies the preset precision, the measurement result of the source base station to the satellite signal is stopped.
  • the acquiring unit is further configured to: in the positioning unit, according to the first geographic coordinates and/or After the geographic coordinates determine the positioning result, the fourth measurement result of the target base station to the satellite signal and the fifth measurement result of the source base station to the satellite signal are obtained; the positioning unit is further configured to determine that the broadcast signal to noise ratio of the fifth measurement result is lower than the pre-predetermined When the threshold is set, the positioning result is updated according to the fourth measurement result; the acquiring unit is further configured to stop acquiring the measurement result of the satellite signal by the source base station.
  • a computer readable storage medium having stored therein instructions; when it is run on a device as described in the second aspect above and any of its possible implementations, The apparatus performs the positioning method as described in the first aspect above and its various possible implementations.
  • a wireless communication device stores instructions that, when the wireless communication device operates on the network device of the second aspect and any of its possible implementations, The network device performs the positioning method as described in the first aspect above and its various possible implementations.
  • the wireless communication device can be a chip.
  • FIG. 1 is a schematic diagram of terminal movement according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a device according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a positioning method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of another terminal moving according to an embodiment of the present invention.
  • Figure 5 is a schematic diagram of DGPS technology
  • FIG. 6 is a schematic diagram of determining a target base station according to an embodiment of the present invention.
  • FIG. 7 is a block diagram of another structure of a device according to an embodiment of the present invention.
  • FIG. 8 is a block diagram of another structure of a device according to an embodiment of the present invention.
  • satellite positioning technology is to determine a reference station for the terminal, the base station and the terminal respectively measure the satellite signal, and then calculate a geographical coordinate according to the measurement result of the terminal and the measurement result of the reference station, and the geographical position indicated by the geographical coordinate As the positioning result of the terminal.
  • satellite positioning techniques may include differential global positioning system (DGPS) technology and carrier-phase difference (RTK) technology.
  • the high-precision positioning service tends to be used locally, which means that the coverage of the base station is smaller. Therefore, the terminal frequently switches between different base stations during the positioning process. At the same time, after the terminal switches to the new cell, it takes a long time to calculate the geographic coordinates.
  • a base station closest to the terminal may be selected as the base station of the terminal, or a base station may be virtually created in the vicinity of the terminal.
  • the terminal is currently located in the service range of the base station A, but after the terminal moves, it is necessary to determine a new base station for the terminal.
  • the moving direction of the terminal is the service range of the base station A, as shown in FIG. 2
  • the new base station of the terminal such as the base station B in FIG.
  • the terminal switches to a new base station (base station B as shown in FIG. 1), continuous high-precision positioning cannot be achieved.
  • the reference station determines the measurement error according to its own measurement result, and broadcasts the measurement error to the terminal, and the terminal can correct its own measurement result according to the measurement error to obtain accurate geographical coordinates.
  • the base station does not broadcast certain necessary information in real time, and may broadcast it in a specific period. If it is broadcast every five seconds, the terminal may have five seconds to receive the information broadcast by the base station, and then within five seconds. There are no positioning results. In this way, when the terminal accesses the new base station, it is also possible that the information broadcasted by the new base station (such as the above measurement error) cannot be received within a certain period of time, and cannot be received until the information broadcasted by the new base station is received. The positioning of the terminal is completed by using DGPS.
  • the use of RTK technology requires a large amount of measurement data. After the terminal accesses a certain base station, it takes a certain time, ten seconds or even ten minutes, to accumulate a sufficient amount of measurement data, such as: phase of the base station.
  • the result of the measurement, the result of the phase measurement by the terminal, etc. can be used to solve the geographic coordinates of the terminal based on the measurement data.
  • the geographic coordinates of the terminal can only be estimated, and the accuracy of the positioning result is poor.
  • the DGPS technology or the RTK technology is used to implement terminal positioning, and when the terminal switches the cell, continuous high-precision positioning services cannot be realized.
  • An embodiment of the present invention provides a positioning method, where it is determined that a terminal is to leave a source base station, and then the measurement result of the source base station on the satellite signal, the measurement result of the target base station to the satellite signal, and the measurement result of the terminal to the satellite signal are obtained, and according to the obtained
  • the measurement results calculate two geographic coordinates, and finally determine the positioning result within a certain period of time after the terminal enters the target base station service range according to the two geographic coordinates.
  • the terminal is in the service range of the source base station, the measurement result of the source base station and the target base station is processed in parallel, and the terminal is determined by using the previously calculated geographic coordinates within a period of time after the terminal switches to the target base station.
  • the positioning result ensures the continuity of the positioning business.
  • the geographic coordinates of the terminal are calculated according to the measurement data.
  • the method provided by the present invention makes the positioning service not affected by the frequent handover of the cell by the terminal, and smoothly transitions when the terminal switches the cell to ensure the continuity of the positioning service.
  • the positioning method provided by the embodiment of the present application is applicable to the device shown in FIG. 3, where the device may be a network side device or a terminal, and the network side device may be a network side with a computing function, such as an X-edge and a core network server.
  • the device may be a terminal having a computing function, such as a smart phone or an iPad.
  • the network side device may include at least one processor 201, a memory 202, a transceiver 203, and a communication bus 204.
  • the processor 201 is a control center of the device, and may be a processor or a collective name of a plurality of processing elements.
  • the processor 201 is a central processing unit (CPU), may be an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • DSPs digital signal processors
  • FPGAs Field Programmable Gate Arrays
  • the processor 201 can perform various functions of the device by running or executing a software program stored in the memory 202 and calling data stored in the memory 202.
  • processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG.
  • a device may include multiple processors, such as processor 201 and processor 205 shown in FIG. Each of these processors can be a single core processor (CPU) or a multi-core processor (multi-CPU).
  • processors herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.
  • the memory 202 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • the dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this.
  • Memory 202 may be present independently and coupled to processor 201 via communication bus 204.
  • the memory 202 can also be integrated with the processor 201.
  • the memory 202 is used to store a software program that executes the solution of the present invention, and is controlled by the processor 201 for execution.
  • the transceiver 203 uses a device such as any transceiver for communication with other devices, and can also be used for communication with a communication network such as an Ethernet, a radio access network (RAN), a wireless local area network ( Wireless Local Area Networks, WLAN), etc.
  • the transceiver 203 may include a receiving unit to implement a receiving function, and a transmitting unit to implement a transmitting function.
  • the communication bus 204 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 2, but it does not mean that there is only one bus or one type of bus.
  • the processor 201 may call the code in the memory 202 to calculate the geographic coordinates of the terminal according to the ranging information of the terminal and the ranging information of the reference station.
  • the ranging information may be pseudo-code ranging information, that is, a measurement distance obtained by using a pseudo-code ranging technology, or may be a carrier phase obtained by measuring a satellite signal.
  • the device structure shown in FIG. 2 does not constitute a limitation to the network side device, and may include more or less components than those illustrated, or some components may be combined, or different component arrangements.
  • An embodiment of the present invention provides a positioning method, which is applied to a network side device or a terminal. As shown in FIG. 3, the method includes the following steps:
  • the service range of the base station may be the coverage of the serving cell of the base station, or may be a range in which the base station can provide the positioning service, and the range may be greater than the coverage of the serving cell of the base station, and the present invention
  • the comparison of the examples is not limited.
  • the terminal when it is determined that the terminal is currently located in an edge area of the source base station service range, and the moving direction of the terminal is away from the source base station service range, it may be determined that the terminal is to leave the source base station service range.
  • the positioning method provided by the embodiment of the present invention is implemented by a network side device, and the network side device may determine, according to the current location of the terminal, whether the terminal is located in an edge region of the source base station service range. For example, referring to FIG. 5, it is assumed that the terminal is currently located at the location D of the source base station service range. If the distance between the location D and the preset edge of the source base station service range is less than or equal to the preset threshold, the terminal is considered to be currently located in the source base station service range. Edge area.
  • the preset threshold is set according to the radius of the service range of the source base station. For example, the preset threshold is 1/10 of the radius of the cell. Of course, this is only an example.
  • the preset threshold is not limited in the embodiment of the present invention. .
  • the preset edge can be considered as the cell edge closest to the current location of the terminal (eg, the above location D).
  • the network side device may determine the moving direction of the terminal according to the positioning result of the terminal within the service range of the source base station. For example, referring to FIG. 4, it is assumed that the terminal is currently located at the location D within the service range of the source base station.
  • the terminal positioning result is three geographic locations: A, B, and C.
  • A, B, and C are closer to the right edge of the service range of the source base station (as shown in FIG. 4, D1>D2>D3), it is determined that A, B, and C are gradually away from the source base station service range. Then, it is determined that the moving direction of the terminal is away from the source base station service range.
  • A, B, and C are arranged from left to right, that is, the terminal moves from left to right to position D, it can be considered that the moving direction of the terminal is far from the source base station service range.
  • A, B, and C are arranged from right to left, that is, the terminal moves from right to left to position D, it can be considered that the moving direction of the terminal is close to the source base station service range.
  • the terminal is in the edge area of the source base station service range, and the moving direction of the terminal is away from the source base station service range, and it is determined that the terminal will move out of the source base station service range.
  • the positioning method provided by the embodiment of the present invention may also be implemented by the terminal, and the terminal may determine, according to the quality degradation condition of the signal from the source base station, whether the terminal is to be removed from the service range of the source base station. Specifically, when the terminal detects that the quality attenuation from the source base station signal is greater than a preset value, it is determined that the terminal is located in an edge region of the source base station service range. When the quality attenuation from the source base station signal is a decreasing trend as a whole before the preset time period, it is determined that the moving direction of the terminal is far from the source base station service range.
  • the source base station, the target base station, and the terminal may obtain the measurement result of the satellite signal by using DGPS technology or RTK technology.
  • Figure 5 is a schematic diagram of the DGPS technology.
  • a base station such as a source base station or a target base station according to an embodiment of the present invention
  • the terminal and the reference station respectively obtain the measurement distance by using the pseudo-code ranging technology (this embodiment of the present invention may be referred to as pseudo-code ranging information), and the reference station can determine the measured distance according to the obtained distance and the actual distance between the reference station and the satellite.
  • the measurement error can be used to correct the measurement distance obtained by the pseudo-code ranging technology by using the measurement error, thereby improving the positioning accuracy.
  • the position of the terminal is determined by determining the position of the three satellites and the distance between the satellite and the current terminal (using the corrected error to the distance of the pseudo-code ranging information).
  • the measurement results of the source base station, the target base station, and the terminal are pseudo-code ranging information, that is, the first measurement result, the second measurement result, and the third measurement result are pseudo-code measurements. Distance information.
  • the principle of the RTK technology is that the terminal and the base station simultaneously measure satellite signals, and determine the geographical coordinates of the terminal according to the carrier phase measured by the terminal and the base station.
  • the carrier signal is a periodic sinusoidal signal
  • the carrier phase includes a whole-peripheral portion and a non-circular portion.
  • the phase measurement of the terminal and the reference station can only measure a portion of the carrier signal that is less than one wavelength, that is, a non-aligned carrier phase. Week part.
  • the core problem of RTK technology is that the carrier phase includes the uncertainty of the whole week, so it takes a complicated calculation process to determine the geographic coordinates of the terminal.
  • N 1 is the whole-cycle portion of the carrier phase corresponding to the terminal
  • ⁇ is the wavelength of the satellite signal
  • (x 1 , y 1 , z 1 ) is the geographic coordinates of the terminal
  • (x 0 , y 0 , z 0 ) is the geographic coordinates of the satellite.
  • N 1 , x 1 , y 1 , z 1 are unknown, ⁇ , x 0 , y 0 , z 0 are known.
  • N 2 is the whole week portion of the carrier phase corresponding to the reference station
  • (x 2 , y 2 , z 2 ) is the geographic coordinates of the base station.
  • N 2 in equation (2) is unknown and the remaining parameters are known. Since x 0 , y 0 , z 0 and x 2 , y 2 , z 2 are known, it can be considered as the above equation (2) Is a constant C.
  • equation (2) is transformed into equation (3):
  • Equation (1) and equation (3) are subtracted to obtain the following equation (4):
  • ⁇ N is the difference between N 1 and N 2 and is an unknown amount; likewise, x 1 , y 1 , and z 1 are unknown.
  • the key to solving the geographic coordinates of the terminal is to solve the above four unknowns of ⁇ N, x 1 , y 1 and z 1 .
  • the terminal and the base station need to measure at least three other satellites to generate signals, determine three equations, and finally solve for ⁇ N, x 1 , y 1 , z 1 .
  • the whole week portion of the carrier phase obtained by the terminal or the base station to measure other satellite signals can be approximated as the same. Therefore, the three equations determined by the signals transmitted by the other three satellites are compared with the above equation (4).
  • the ⁇ N is the same, and x 0 , y 0 , and z 0 are different. Further, the four equations can be used to solve for ⁇ N, x 1 , y 1 , z 1 .
  • the measurement results of the source base station, the target base station, and the terminal are carrier phase and pseudo-code ranging information, that is, the first measurement result, the second measurement result, and the third measurement result are all Carrier phase and pseudo-code ranging information.
  • the source base station, the target base station, and the terminal send the measurement result obtained by measuring the satellite signal to the network side device, so that the network side device can acquire the measurement result of the source base station, the target base station, and the terminal to the satellite signal. , such as the first measurement result, the second measurement result, and the third measurement result.
  • the source base station and the target base station broadcast the measurement result of the own base station. If the service range of the source base station and the target base station overlaps, when the terminal is in the edge area of the source base station close to the target base station, the terminal can receive the source.
  • the measurement result broadcasted by the base station may also receive the measurement result broadcast by the target base station, that is, the terminal may acquire the first measurement result of the source base station, the second measurement result of the target base station, and of course, the terminal itself may acquire the measurement satellite.
  • the third measurement obtained by the signal may be used to acquire the measurement satellite.
  • the terminal can only receive the measurement result played by the source base station, and cannot receive the measurement result broadcast by the target base station.
  • the network side device is required to forward the measurement result played by the target base station to the terminal.
  • the source base station, the target base station, and the terminal measure the distance between the self and the satellite, that is, the first measurement result, the second measurement result, and the third measurement result are all pseudo-code ranging. information. Since the source base station and the target base station are the base stations of the positioning terminal, the geographical locations of the source base station and the target base station are determined, that is, the actual distance between the source base station and the target base station to the satellite is known.
  • the first measurement result measured by the source base station may be a measurement distance of the source base station to the satellite, and the network side device (or terminal) may determine the measurement error according to the first measurement result, the actual distance from the source base station to the satellite, and then the third according to the measurement error.
  • the measurement result is corrected to obtain a more accurate distance between the terminal and the satellite, and then the geographic coordinates of the terminal, that is, the first geographical coordinate, are determined according to the distance.
  • the second measurement result measured by the target base station may be a measurement distance of the target base station to the satellite
  • the network side device or terminal
  • the network side device may determine the measurement error according to the second measurement result and the actual distance from the target base station to the satellite, and then according to the measurement error
  • the third measurement result is corrected to obtain a more accurate distance between the terminal and the satellite, and then a geographic coordinate, that is, the first geographical coordinate, is determined according to the distance.
  • the source base station, the target base station, and the terminal measure the carrier phase of the satellite signal, that is, the first measurement result, the second measurement result, and the third measurement result are both “carrier phase”.
  • the network side device (or terminal) can calculate the geographic coordinates of the terminal, that is, the first geographical coordinate, according to the carrier phase measured by the source base station and the carrier phase measured by the terminal.
  • the network side device may (or the terminal) calculate the geographic coordinates of the terminal, that is, the second geographic coordinate, according to the carrier phase measured by the target base station and the carrier phase measured by the terminal.
  • calculating the terminal according to the second measurement result and the third measurement result while calculating the first geographic coordinate of the terminal according to the first measurement result and the third measurement result The second geographic coordinates. It can be considered that in a unit time, for example, within 1 s, not only the first geographic coordinates but also the second geographic coordinates need to be calculated. In a certain unit time, if the second geographic coordinate calculated according to the measurement result of the target base station does not reach the desired accuracy, further if only the second geographic coordinate is calculated, the final positioning result is not accurate.
  • the measurement result of the target base station is used to obtain the high-precision positioning result, the measurement result of the source base station is not required to be obtained, and the calculation result of the first measurement result and the third measurement result is no longer needed.
  • the first geographic coordinates of the terminal are used to obtain the high-precision positioning result, the measurement result of the source base station is not required to be obtained, and the calculation result of the first measurement result and the third measurement result is no longer needed.
  • the positioning result of the terminal may be determined according to the pre-calculated first geographic coordinate and/or the second geographic coordinate, and the continuous positioning is maintained. High-precision positioning business.
  • the network side device (or terminal) can determine the positioning result according to the following three methods, including:
  • a specific decision may be performed according to the first geographic coordinate and the second geographic coordinate to filter out the calculated third geographic coordinate in the first geographic coordinate or the second geographic coordinate.
  • the first geographic coordinate is used before the fixed solution is obtained using the second geographic coordinate (ie, ⁇ N is solved), and the second geographic coordinate is adopted after reaching the fixed solution.
  • ⁇ N is the difference of the entire circumference portion
  • ⁇ N should also be an integer, and once the calculated ⁇ N is an integer, the ⁇ N in the calculation is considered to be accurate.
  • the second geographic coordinate is determined according to the first ⁇ N, and the new measurement data and the new terminal are subsequently determined according to the target base station.
  • the second ⁇ N calculated by the measurement data is also an integer, indicating that the previously calculated first ⁇ N is accurate, and thus the second geographic coordinate can be considered to reach a fixed solution.
  • the first geographic coordinate and the second geographic coordinate may also be input, and the calculated result is the third geographic coordinate.
  • the distance between the terminal and the source base station and the distance between the terminal and the target base station are estimated according to the current location of the terminal, and the distance between the terminal and the source base station and the distance between the terminal and the target base station are determined.
  • a geographic coordinate, a weight of the second geographic coordinate, and then a weighted average calculation obtains a third geographic coordinate.
  • the distance between the terminal and the source base station is 500m
  • the distance from the target base station is 800m
  • the weight of the second geographic coordinate is 800.
  • /(800+500) 8/13
  • the first geographic coordinate 5/13*X+8/13*Y
  • X represents the first geographic coordinate and Y represents the second geographic coordinate.
  • the playback signal-to-noise ratio is the signal-to-noise ratio of the signal sent by the sender to the receiving and transmitting process.
  • the terminal needs to receive the first measurement result and the second measurement result. If there is an overlapping area in the service range of the source base station and the target base station, when the terminal is in the edge area of the source base station close to the target base station, the terminal may receive the measurement result broadcasted by the source base station, and may also receive the measurement result broadcast by the target base station, then the first The broadcast signal-to-noise ratio of the measurement result is a signal-to-noise ratio in the process of the first measurement result sent by the source base station to the terminal, and the broadcast signal-to-noise ratio of the second measurement result is in the process of the second measurement result sent by the target base station reaching the terminal. Signal to noise ratio.
  • the terminal when the terminal is in the edge area where the source base station is close to the target base station, the terminal can only receive the measurement result played by the source base station, and cannot receive the measurement result broadcast by the target base station.
  • the network side device is required to forward the measurement result played by the target base station to the terminal.
  • the broadcast signal to noise ratio of the second measurement result is a signal to noise ratio in the process of the second measurement result sent by the target base station reaching the network side device.
  • the network side device when the positioning method provided by the embodiment of the present invention is implemented by a network side device, the network side device needs to receive the foregoing first measurement result and the second measurement result.
  • the broadcast signal to noise ratio of the first measurement result is a signal to noise ratio in a process in which the first measurement result sent by the source base station reaches the network side device, and the broadcast signal to noise ratio of the second measurement result is a second measurement sent by the target base station.
  • the result is a signal to noise ratio in the process of reaching the network side device.
  • the positioning result may be determined according to the third manner described above.
  • the geographic coordinates may be (x, y, z), wherein the physical meanings of x, y, and z are representations of the three-dimensional position of the terminal in the geocentric coordinate system.
  • the geocentric coordinate system represents a spatial rectangular coordinate system established with the center of mass of the earth as the origin, and the X-axis coincides with the intersection of the first meridional plane and the equatorial plane, and is positive to the east; the Z-week coincides with the earth's rotation axis, and the northward direction is Positive; the Z axis is perpendicular to the XY plane and satisfies the right hand rule.
  • the so-called right-hand rule that is, the thumb of the right hand points to the positive direction of the Z axis, and the direction of the four fingers of the right hand is the direction of the X axis to the Y axis.
  • the network side device may further determine a target base station for the terminal, and send information of the target base station to the terminal, so that the terminal accesses the target base station according to information of the target base station.
  • the network side device determines the target base station according to the moving direction of the terminal and the location of the terminal. For example, the network side device may determine, as the target base station, a base station that is closest to the terminal in the direction of the terminal mobile. For example, referring to FIG. 6, the direction in which the terminal moves is from left to right, then the base station Z closest to the terminal on the right side of the current location of the terminal (eg, position D in FIG. 6) can be determined as the target base station.
  • target base station may be considered as the first base station that is accessed after the terminal leaves the service range of the source base station.
  • the service range of the source base station and the target base station may have overlapping areas.
  • the service range of the source base station and the target base station may also have no overlapping area.
  • the target base station determined by the network side device may be a certain base station, and the network side device sends the determined information of the target base station to the terminal, and after indicating that the terminal leaves the service range of the source base station, the terminal may access the target base station.
  • a first geographic coordinate of the terminal and calculating a plurality of second geographic coordinates of the terminal according to the second measurement result and each third measurement result.
  • a positioning result of the terminal is determined according to the first geographic coordinate and/or the plurality of second geographic coordinates. Specifically, a geographic coordinate may be selected as a final positioning result, or a geographic coordinate may be weighted to obtain a final positioning result.
  • the network side device may further determine, by the plurality of base stations in the direction of the mobile terminal, the candidate base station, and the information of the multiple candidate base stations (ie, the accessible base station information according to the embodiment of the present invention). After being sent to the terminal, after receiving the information of the multiple candidate base stations sent by the network side device, the terminal may select one of the multiple candidate base stations as the target base station. That is to say, the information of the candidate base station necessarily includes the information of the target base station.
  • a fourth measurement result of the satellite signal by the target base station may also be acquired, if If the positioning result determined by the four measurement results meets the preset accuracy, the measurement result of the satellite signal by the source base station is stopped, and the high-precision positioning service can be implemented according to the measurement result of the target base station.
  • the embodiment of the present invention provides a device, which may be a network side device or a terminal involved in the embodiment of the present invention.
  • a device which may be a network side device or a terminal involved in the embodiment of the present invention.
  • FIG. 7 shows a possible structural diagram of the above device.
  • the terminal includes a determining unit 701, an obtaining unit 702, and a positioning unit 703.
  • a determining unit 701 is configured to support the device to perform step 301 in the above embodiments, and/or other processes for the techniques described herein.
  • An obtaining unit 702 configured to support the device to perform step 302 in the above embodiments, and/or other processes for the techniques described herein;
  • a sending unit 703 configured to support the device to perform steps 303 and 304 in the foregoing embodiments, and/or other processes for the techniques described herein;
  • the device includes a processing module 801 and a communication module 802.
  • the processing module 801 is configured to control and manage the actions of the device, for example, perform the steps performed by the determining unit 701, the positioning unit 703, and/or other processes for performing the techniques described herein.
  • the communication module 802 is configured to support the interaction between the device and other devices, such as the step of performing the obtaining unit 702 to obtain the measurement result.
  • the device may further include a storage module 803 for storing program codes and data of the device.
  • the processing module 801 is a processor
  • the communication module 802 is a transceiver
  • the storage module 803 is a memory
  • the device may be the device shown in FIG. 2. If the transceiver is a receiver and a transmitter, the receiver performs a process of transmitting the device, and the transmitter performs a step of receiving the device, such as: obtaining a first measurement result of the source base station on the satellite signal, and second, the target base station on the satellite signal The measurement result and the third measurement result of the satellite signal by the terminal.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium.
  • the technical solution of the embodiments of the present application may be embodied in the form of a software product in the form of a software product in essence or in the form of a contribution to the prior art, and the software product is stored in a storage medium.
  • a number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

Abstract

Les modes de réalisation de la présente invention concernent un procédé et un dispositif de positionnement se rapportant au domaine des communications. La présente invention permet de pouvoir assurer la continuité d'un service de positionnement de haute précision pendant un transfert intercellulaire de cellule. Le procédé consiste : à déterminer qu'un terminal est sur le point de se déplacer hors d'une plage de service d'une station de base source, à acquérir un premier résultat de mesure d'un signal satellite par la station de base source, un deuxième résultat de mesure du signal satellite par une station de base cible, et un troisième résultat de mesure du signal satellite par le terminal ; la station de base cible étant une station de base faisant l'objet d'un accès par le terminal après que le terminal quitte la station de base source ; à calculer des premières coordonnées géographiques du terminal en fonction du premier résultat de mesure et du troisième résultat de mesure, et à calculer des secondes coordonnées géographiques du terminal en fonction du deuxième résultat de mesure et du troisième résultat de mesure ; et à déterminer, en fonction des premières coordonnées géographiques et/ou des secondes coordonnées géographiques, un résultat de positionnement dans une durée prédéfinie après l'accès du terminal à la station de base cible.
PCT/CN2018/075625 2018-02-07 2018-02-07 Procédé et dispositif de positionnement WO2019153140A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/075625 WO2019153140A1 (fr) 2018-02-07 2018-02-07 Procédé et dispositif de positionnement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/075625 WO2019153140A1 (fr) 2018-02-07 2018-02-07 Procédé et dispositif de positionnement

Publications (1)

Publication Number Publication Date
WO2019153140A1 true WO2019153140A1 (fr) 2019-08-15

Family

ID=67547764

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/075625 WO2019153140A1 (fr) 2018-02-07 2018-02-07 Procédé et dispositif de positionnement

Country Status (1)

Country Link
WO (1) WO2019153140A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188354B1 (en) * 1999-03-29 2001-02-13 Qualcomm Incorporated Method and apparatus for determining the location of a remote station in a CDMA communication network
CN102158920A (zh) * 2011-05-13 2011-08-17 新邮通信设备有限公司 一种切换基站时目标基站的选择方法及基站
CN103237324A (zh) * 2013-04-19 2013-08-07 西南交通大学 一种地理位置信息辅助lte系统快速切换判决方法
CN103686998A (zh) * 2013-12-11 2014-03-26 上海大唐移动通信设备有限公司 一种基于aoa的切换位置定位方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188354B1 (en) * 1999-03-29 2001-02-13 Qualcomm Incorporated Method and apparatus for determining the location of a remote station in a CDMA communication network
CN102158920A (zh) * 2011-05-13 2011-08-17 新邮通信设备有限公司 一种切换基站时目标基站的选择方法及基站
CN103237324A (zh) * 2013-04-19 2013-08-07 西南交通大学 一种地理位置信息辅助lte系统快速切换判决方法
CN103686998A (zh) * 2013-12-11 2014-03-26 上海大唐移动通信设备有限公司 一种基于aoa的切换位置定位方法及装置

Similar Documents

Publication Publication Date Title
US10667207B2 (en) Access point assisted roaming
CN109597109B (zh) 一种定位方法、定位装置及定位系统
JP3581326B2 (ja) 重み付きリッジ回帰を使用する位置決定方法
US10866303B2 (en) Determining the location of a mobile computing device
CN111385317B (zh) 一种数据传输方法、装置及系统
KR102212081B1 (ko) 장치 위치를 결정하기 위한 측위 소스 순위화 기법
WO2020140443A1 (fr) Procédé et appareil de positionnement de terminal, et support de stockage
US9848304B2 (en) Positioning of mobile device
US11490356B2 (en) Regulation of airtime for ranging requests
CN112578424B (zh) 终端设备的定位方法、装置、终端设备及存储介质
JP2020517908A (ja) 測位方法および測位装置
JP2017067529A (ja) 位置推定装置、位置推定方法、及び位置推定プログラム
CN114051200B (zh) 终端定位方法、lmf、终端和存储介质
WO2019153140A1 (fr) Procédé et dispositif de positionnement
KR102612792B1 (ko) 전자 장치 및 전자 장치의 관심 영역 진입 판단 방법
WO2019228001A1 (fr) Procédé de paiement et client
CN115561731A (zh) 位姿优化方法、点云地图建立方法、计算机设备及介质
CN114006871A (zh) 流量控制方法、装置、容器和存储介质
WO2020107141A1 (fr) Procédé et dispositif de positionnement
CN113645630A (zh) 一种基站布局的方法、装置、电子设备及存储介质
CN114731608A (zh) 定位请求处理方法、设备及系统
CN113271538B (zh) 5g网络下的授时方法、装置、用户设备及通信系统
CN114845242A (zh) 终端设备定位方法、装置、存储介质及电子设备
CN113747345A (zh) 用于管理移动终端的方法、设备和计算机程序产品
KR20240030538A (ko) 디바이스의 위치에서 가장 근접한 기준국을 자동 선정하여 보정정보 수신 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18905332

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18905332

Country of ref document: EP

Kind code of ref document: A1