WO2020155912A1 - Procédé de localisation de puce de positionnement et dispositif terminal - Google Patents

Procédé de localisation de puce de positionnement et dispositif terminal Download PDF

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Publication number
WO2020155912A1
WO2020155912A1 PCT/CN2019/126636 CN2019126636W WO2020155912A1 WO 2020155912 A1 WO2020155912 A1 WO 2020155912A1 CN 2019126636 W CN2019126636 W CN 2019126636W WO 2020155912 A1 WO2020155912 A1 WO 2020155912A1
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WO
WIPO (PCT)
Prior art keywords
positioning
time
chip
positioning chip
decoding
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PCT/CN2019/126636
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English (en)
Chinese (zh)
Inventor
谭伟强
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泰斗微电子科技有限公司
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Publication of WO2020155912A1 publication Critical patent/WO2020155912A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/34—Power consumption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
    • G01S19/258—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position

Definitions

  • the invention belongs to the technical field of positioning, and in particular relates to a method and terminal equipment for positioning a positioning chip.
  • GPS Global Positioning System
  • Low-power location tracking applications that is, applications that need to be located every 1 hour
  • the user positioning receiver turns on the GPS chip to locate once every 1 hour. If the location can be located within 3 minutes, immediately power off the GPS , If the GPS cannot be located within 3 minutes, the GPS will be powered off at the 3rd minute, and the power-on positioning is unsuccessful this time.
  • the battery capacity is small, and the existing GPS chip needs to be powered off in the third minute when the GPS chip cannot locate, resulting in high power consumption of the GPS chip and poor user experience.
  • the embodiments of the present invention provide a positioning chip positioning method and terminal equipment to solve the problem of low-power positioning tracking applications in the prior art, and the battery capacity is small, and the existing GPS chip cannot be positioned. It is necessary to power off the GPS in the 3rd minute, which leads to the problem of high power consumption of the GPS chip and poor user experience.
  • the first aspect of the embodiments of the present invention provides a method for positioning a positioning chip, including:
  • the working phases include: a satellite signal acquisition working phase, a time decoding working phase, an ephemeris decoding working phase, and a positioning solution working phase.
  • the method further includes:
  • the time required for the satellite signal acquisition is different, the time required for time decoding is different, the time required for decoding the ephemeris is different, and the time required for the positioning solution is different. different.
  • the detecting the positioning time required for the positioning chip to determine the current position at least one preset time after the positioning chip is powered on according to the current working stage of the positioning chip includes:
  • At least one preset moment after the positioning chip is powered on the positioning time required for the positioning chip to determine the current position is detected according to the number of satellites corresponding to the currently received transmitted satellite signals.
  • the detecting the positioning time required for the positioning chip to determine the current position according to the current working stage of the positioning chip at at least one preset time after the positioning chip is powered on includes:
  • At least one preset moment after the positioning chip is powered on the positioning time required for the positioning chip to determine the current position is detected according to the number of satellites corresponding to the currently received transmitted satellite signals and the number of satellites that have completed ephemeris decoding.
  • the performing the corresponding operation according to the positioning time includes:
  • the positioning chip continues to perform the positioning operation.
  • a second aspect of the embodiments of the present invention provides a device for positioning a chip, including:
  • Power-on module used to power on the positioning chip
  • the detection module is configured to detect the positioning time required for the positioning chip to determine the current position at least one preset time after the positioning chip is powered on according to the current working stage of the positioning chip;
  • the processing module is configured to perform corresponding operations according to the positioning time.
  • a third aspect of the embodiments of the present invention provides a terminal device, including: a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor executes the computer program When realizing the steps of the method for positioning the chip as described above.
  • a fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, including: the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for positioning a chip as described above is implemented A step of.
  • the embodiment of the present invention has the beneficial effect of detecting the positioning time required for the positioning chip to determine the current position at least one preset time after the positioning chip is powered on according to the current working stage of the positioning chip , According to the positioning time estimated by the positioning chip, corresponding operations can be performed, which saves the power consumption of the user positioning receiver and improves the user experience.
  • FIG. 1 is a schematic diagram of an implementation process of a method for positioning a positioning chip according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the implementation process of another method for positioning a chip according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an interaction flow for performing corresponding operations according to positioning time according to an embodiment of the present invention
  • FIG. 4 is an example diagram of a device for positioning a positioning chip provided by an embodiment of the present invention.
  • Fig. 5 is a schematic diagram of a terminal device provided by an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of the implementation process of a method for positioning a positioning chip according to an embodiment of the present invention, and the details are as follows:
  • Step 101 Power on the positioning chip.
  • the positioning chip is the core component for positioning in the positioner.
  • the positioning chip may be a GPS chip.
  • Step 102 According to the current working stage of the positioning chip, detect the positioning time required for the positioning chip to determine the current position at at least one preset moment after the positioning chip is powered on.
  • the working phases of the positioning chip may include: satellite signal acquisition working phase, time decoding working phase, ephemeris decoding working phase, and positioning solution working phase.
  • the sequence execution of the working phases of the positioning chip is the positioning execution of the positioning chip. process.
  • a positioning process of positioning a chip may be included, which specifically includes the following steps.
  • Step 201 Receive satellite signals sent by satellites.
  • the function of the satellite part of the GPS navigation system is to continuously transmit satellite signals.
  • the positioning chip When the positioning chip is powered on, it can receive the satellite signals sent by the satellite to perform positioning.
  • the satellite signal broadcasts a frame of satellite data every 30 seconds.
  • Each frame of satellite data contains 5 subframes.
  • Each subframe is 6 seconds long.
  • Each subframe contains time information.
  • the continuous 18 seconds of this frame of satellite data contains There is ephemeris information.
  • Ephemeris refers to the precise position or trajectory table of a flying object that changes with time in GPS surveys. It is a function of time.
  • the satellite ephemeris uses the mathematical relationship between the six orbital parameters of Kepler's law to determine the time, coordinates, azimuth, speed and other parameters of the flying body, with extremely high accuracy. Satellite ephemeris information is also called ephemeris.
  • Ephemeris data is used to indicate the predetermined location of a star at regular intervals, or the predetermined location of an artificial satellite at regular intervals.
  • Step 202 Detect whether the time data and ephemeris data stored in the positioning chip are valid; when the time data and the ephemeris data stored in the positioning chip are invalid, perform step 203; when the positioning chip When the time data and the ephemeris data stored in are valid, step 204 is executed.
  • the time data and ephemeris data stored in the positioning chip are the latest time data and ephemeris data that can be used for subsequent positioning. For example, if the time data and ephemeris data saved in the positioning chip are data before the preset time, this time data and ephemeris data are not available, and the time data and ephemeris data saved in the positioning chip are data after the preset time , The time data and ephemeris data are available.
  • the preset time is data set based on experience, and different positioning chips can set the preset time differently. For example, if the preset time is 5 minutes, that is, the time data and ephemeris data saved in the positioning chip are the data 5 minutes ago, it is not available.
  • Step 203 Perform time decoding and ephemeris decoding on the received satellite signal to obtain decoded time data and ephemeris data, and perform step 204.
  • a cold start operation is performed to autonomously obtain the time data and ephemeris data of the satellite. Further, when the time data and the ephemeris data stored in the positioning chip are valid, they can be directly used for positioning calculation.
  • the satellite signal decodes the time of the satellite signal, extract the time data, and compare it with the clock of the user positioning receiver (the user positioning receiver contains the positioning chip) to know the distance between the satellite and the user positioning receiver, and then use the
  • the satellite signal decodes the ephemeris data to extract the ephemeris data. According to the ephemeris data, the position of the satellite when the satellite signal is transmitted is calculated, and the position and speed of the user positioning receiver in the WGS-84 geodetic coordinate system can be known.
  • Step 204 Detect the number of satellites corresponding to all the received satellite signals.
  • Step 205 If all the received satellite signals correspond to at least four satellites, and the time decoding and the ephemeris decoding are successful, perform positioning solution based on the decoded at least four time data and at least four ephemeris data , Output the current position.
  • a ⁇ t must be introduced, that is, between the satellite and the user positioning receiver.
  • the basic conditions for general satellite positioning are: at least four satellites are captured, and at least four captured satellites are successfully decoded. Therefore, in this embodiment, it is necessary to receive satellite signals sent by at least four satellites.
  • Steps 201 to 205 describe the positioning process of the positioning chip, but under different signal conditions, the time required for the satellite signal acquisition is different, the time required for the time decoding is different, and the time required for the ephemeris decoding is different, The time required for the positioning solution is different.
  • the signal conditions are good, and the time required for each stage of satellite positioning is relatively short, and the time for satellite positioning is also short; under the environment of viaducts, high-rise buildings, indoors, etc., the signal conditions are good, and satellite positioning
  • the time required for each work phase is longer than the time required for each work phase in an environment with good signal conditions. Therefore, the time required for satellite positioning is also longer than the time required for satellite positioning in an environment with good signal conditions; In the absence of satellite signals, the positioning chip may never capture four satellites, which may result in unsuccessful satellite positioning.
  • the positioning time required for the positioning chip to determine the current position can more accurately detect the time required for positioning the positioning chip.
  • the positioning chip When the signal conditions are good, the work of the positioning chip is going smoothly. At a preset moment after the positioning chip is powered on, the positioning chip may have completed the satellite signal acquisition work phase, the time decoding work phase, and the ephemeris decoding work phase. At this time, the positioning time required for the positioning chip to determine the current position is detected according to the number of captured satellites and the number of satellites that have completed the ephemeris decoding.
  • the positioning chip is detected to determine the positioning required for the current position according to the number of satellites corresponding to the currently received transmitted satellite signal time.
  • the positioning chip When the signal condition is poor, at a preset moment after the positioning chip is powered on, the positioning chip may only be in the satellite signal acquisition phase, and the number of captured satellites is less than four. At this time, the positioning chip is detected according to the number of captured satellites Determine the positioning time required for the current position.
  • the preset time for detecting the positioning time can be set based on experience.
  • the preset time can be the 30th second when the positioning chip is powered on, or the preset time can be the 120th second when the positioning chip is powered on.
  • the positioning chip After the positioning chip is powered on, it starts to receive the satellite signal sent by the satellite and captures the satellite. It is found that the time data and ephemeris data saved in the positioning chip are invalid. It is necessary to re-execute time decoding and ephemeris decoding independently.
  • the estimated positioning time is 300 seconds. When the positioning chip was powered on in the second second, eight satellites were successfully captured. At this time, the estimated positioning time is 40 seconds. In an open environment, the acquisition of satellite signals only takes 1 to 2 seconds. At the 7th second after the positioning chip is powered on, the time of a satellite is successfully decoded. At this time, the estimated positioning time is 24 seconds. Many tests have shown that the time required for satellite time decoding is about 6 seconds.
  • the ephemeris of a satellite is successfully decoded.
  • the estimated positioning time is 9 seconds.
  • Many tests have shown that it takes 18 to 30 seconds to decode the ephemeris of satellites. It should be noted that the time decoding and ephemeris decoding of different satellites can be performed at the same time. Many tests show that the positioning solution can be completed within 1 second. Therefore, in the case of good signal conditions, the average positioning time is generally about 30 seconds.
  • Table 2 The time required for positioning the chip to perform various tasks in an environment with better signal conditions
  • the estimated positioning time is 300 seconds.
  • the positioning chip is powered on, the first satellite is successfully captured.
  • the estimated positioning time is 300 seconds.
  • the fourth satellite is successfully captured. In an environment with good signal conditions, it takes 4 to 30 seconds to capture satellite signals.
  • the positioning chip is powered on for 10 seconds, the time of a satellite is successfully decoded. At this time, the estimated positioning time is 290 seconds.
  • the decoding of ephemeris data may not be able to successfully decode within one frame of satellite data, and multiple frames of satellites are required. It may take 30*N to decode the data to verify each other.
  • the positioning calculation time if the distribution of the visible satellites is not good, the positioning calculation time will be longer, and it may even be necessary to wait for one more successfully decoded satellite to participate in the positioning calculation before the positioning result can be output. Therefore, when the signal condition is good, the average positioning time is generally about 120 seconds.
  • Table 3 The time required for positioning the chip to perform various tasks in an environment with poor signal conditions
  • the positioning chip After the positioning chip is powered on, it starts to receive the satellite signal sent by the satellite and captures the satellite. It is found that the time data and ephemeris data saved in the positioning chip are invalid. It is necessary to re-execute time decoding and ephemeris decoding independently.
  • the estimated positioning time is 300 seconds. When the positioning chip is powered on, the first satellite is successfully captured. At this time, the estimated positioning time is 300 seconds. When the positioning chip is powered on, the second satellite is successfully captured. The estimated positioning time is 290 seconds. When the positioning chip is powered on for 300 seconds, only two satellites are captured. Therefore, if the satellite signal is bad or there is no satellite, the positioning chip may not be able to capture 4 visible satellites, so the positioning will remain unsuccessful.
  • Step 103 Perform a corresponding operation according to the positioning time.
  • step 103 includes the following steps.
  • Step 301 Detect whether the positioning time exceeds a preset time; when the positioning time exceeds the preset time, perform step 302; when the positioning time does not exceed the preset time, perform step 303.
  • the preset time can be set based on experience, for example, the preset time can be set to 80 seconds, or the preset time is set to 120 seconds, and the specific setting value of the preset time is not limited in this embodiment.
  • Step 302 Perform a power-off operation on the positioning chip.
  • the host computer can directly power off the positioning chip.
  • Step 303 The positioning chip continues to perform the positioning operation.
  • the positioning chip is not powered off first, and then the positioning chip is powered off after the positioning is completed.
  • the corresponding positioning time can be executed according to the positioning time estimated by the positioning chip. The operation saves the power consumption of the user positioning receiver and improves the user experience.
  • FIG. 4 shows an example diagram of a chip positioning device provided by an embodiment of the present invention.
  • the device may include: a power-on module 401, a detection module 402, and a processing module 403.
  • the power-on module 401 is used to power-on the positioning chip.
  • the detection module 402 is configured to detect the positioning time required by the positioning chip to determine the current position at at least one preset time after the positioning chip is powered on according to the current working stage of the positioning chip.
  • the processing module 403 is configured to perform corresponding operations according to the positioning time.
  • the working phase may include: a satellite signal acquisition working phase, a time decoding working phase, an ephemeris decoding working phase, and a positioning solution working phase.
  • the time required for the satellite signal acquisition is different
  • the time required for the time decoding is different
  • the time required for the ephemeris decoding is different
  • the time required for the positioning solution is different.
  • the signal conditions are good, and the time required for each stage of satellite positioning is relatively short, and the time for satellite positioning is also short
  • the signal conditions are good, and satellite positioning
  • satellite positioning The time required for each work phase is longer than the time required for each work phase in an environment with good signal conditions. Therefore, the time required for satellite positioning is also longer than the time required for satellite positioning in an environment with good signal conditions; In the absence of satellite signals, the positioning chip may never capture four satellites, which may result in unsuccessful satellite positioning.
  • the positioning chip is detected to determine the positioning required for the current position according to the number of satellites corresponding to the currently received transmitted satellite signal time.
  • the positioning chip when the signal condition is good, at least one preset time after the positioning chip is powered on, the number of satellites corresponding to the currently received transmitted satellite signal and the number of satellites that have completed ephemeris decoding are detected to detect the The positioning time required for the positioning chip to determine the current position can more accurately detect the time required for positioning the positioning chip.
  • the processing module 403 is specifically configured to detect whether the positioning time exceeds a preset time; when the positioning time exceeds the preset time, perform a power-off operation on the positioning chip; When the positioning time does not exceed the preset time, the positioning operation continues.
  • the above-mentioned device for positioning the positioning chip can estimate the positioning time required for the positioning chip to determine the current position by detecting the positioning time required for the positioning chip to determine the current position by the detection module at least one preset time after the positioning chip is powered on according to the current working stage of the positioning chip The positioning time is reduced, the corresponding operation is performed, the power consumption of the user positioning receiver is saved, and the user experience is improved.
  • Fig. 5 is a schematic diagram of a terminal device provided by an embodiment of the present invention.
  • the terminal device 5 of this embodiment includes: a processor 501, a memory 502, and a computer program 503 stored in the memory 502 and running on the processor 501, such as a program for positioning a chip. .
  • the processor 501 executes the computer program 503 the steps in the embodiment of the method for positioning a chip are implemented, for example, steps 101 to 103 shown in FIG. 1, or steps 201 to 205 shown in FIG. 2, or Step 301 to step 303 shown in 3.
  • the processor 501 executes the computer program 503, the functions of the modules in the foregoing device embodiments are implemented, for example, the functions of the modules 401 to 403 shown in FIG. 4.
  • the computer program 503 may be divided into one or more program modules, and the one or more program modules are stored in the memory 502 and executed by the processor 501 to complete the present invention.
  • the one or more program modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 503 in the device for positioning the positioning chip or the terminal device 5.
  • the computer program 503 may be divided into a power-on module 401, a detection module 402, and a processing module 403, and the specific functions of each module are shown in FIG. 4, which will not be repeated here.
  • the terminal device 5 may be a computing device such as a desktop computer, a notebook, a palmtop computer, and a cloud server.
  • the terminal device may include, but is not limited to, a processor 501 and a memory 502.
  • FIG. 5 is only an example of the terminal device 5, and does not constitute a limitation on the terminal device 5. It may include more or less components than shown in the figure, or a combination of certain components, or different components.
  • the terminal device may also include input and output devices, network access devices, buses, etc.
  • the so-called processor 501 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory 502 may be an internal storage unit of the terminal device 5, such as a hard disk or memory of the terminal device 5.
  • the memory 502 may also be an external storage device of the terminal device 5, such as a plug-in hard disk equipped on the terminal device 5, a smart memory card (Smart Media Card, SMC), and a Secure Digital (SD) Card, Flash Card, etc. Further, the memory 502 may also include both an internal storage unit of the terminal device 5 and an external storage device.
  • the memory 502 is used to store the computer program and other programs and data required by the terminal device 5.
  • the memory 502 can also be used to temporarily store data that has been output or will be output.
  • the disclosed device/terminal device and method may be implemented in other ways.
  • the device/terminal device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units.
  • components can be combined or integrated into another system, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated module/unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the present invention implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program.
  • the computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, it can implement the steps of the foregoing method embodiments. .
  • the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms.
  • the computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • electrical carrier signal telecommunications signal
  • software distribution media etc.
  • the content contained in the computer-readable medium can be appropriately increased or decreased in accordance with the requirements of the legislation and patent practice in the jurisdiction.
  • the computer-readable medium Does not include electrical carrier signals and telecommunication signals.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

La présente invention a trait au domaine technique de la localisation et concerne un procédé de localisation de puce de positionnement et un dispositif terminal, le procédé consistant : à alimenter une puce de positionnement ; selon la phase de travail en cours de la puce de positionnement, à détecter, à au moins un moment prédéfini après l'alimentation de la puce de positionnement, le temps de localisation requis pour la puce de positionnement pour déterminer la position courante ; et, en fonction du temps de localisation estimé de la puce de positionnement, à exécuter des opérations correspondantes, ce qui réduit la consommation d'énergie d'un récepteur de positionnement utilisateur et améliore l'expérience utilisateur.
PCT/CN2019/126636 2019-01-31 2019-12-19 Procédé de localisation de puce de positionnement et dispositif terminal WO2020155912A1 (fr)

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CN106932798A (zh) * 2017-02-27 2017-07-07 武汉市龙腾创科技有限公司 一种搜救定位系统及方法
CN107959966A (zh) * 2017-12-05 2018-04-24 青岛海信移动通信技术股份有限公司 降低定位类蜂窝物联网终端功耗的方法、装置及终端设备

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