WO2022122019A1 - 一种全球导航卫星系统gnss启动方法及装置 - Google Patents

一种全球导航卫星系统gnss启动方法及装置 Download PDF

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Publication number
WO2022122019A1
WO2022122019A1 PCT/CN2021/137106 CN2021137106W WO2022122019A1 WO 2022122019 A1 WO2022122019 A1 WO 2022122019A1 CN 2021137106 W CN2021137106 W CN 2021137106W WO 2022122019 A1 WO2022122019 A1 WO 2022122019A1
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Prior art keywords
gnss
position information
startup mode
time
lte
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PCT/CN2021/137106
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English (en)
French (fr)
Inventor
晏龙
李知方
杨江
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紫光展锐(重庆)科技有限公司
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Publication of WO2022122019A1 publication Critical patent/WO2022122019A1/zh

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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
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • 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
    • G01S19/256—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 timing, e.g. time of week, code phase, timing offset
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the technical field of communication positioning, and in particular, to a method and device for starting a global navigation satellite system GNSS.
  • the Global Navigation Satellite System is a space-based radio navigation and positioning system that can provide users with all-weather 3-dimensional coordinates, velocity and time information anywhere on the earth's surface or near-Earth space.
  • the 32K crystal oscillator count of the chip is usually used to determine the sleep time of the GNSS during the GNSS sleep process, so that after the GNSS receives the next positioning request, it can determine the way to start the GNSS according to the sleep time. , and then start GNSS to obtain the location information of the terminal device.
  • the way to start GNSS includes cold start method (that is, GNSS does not have any prior data, obtains aerospace positioning satellite parameters and obtains positioning according to the aerospace positioning parameters) and hot start method (that is, GNSS has prior data, and can be based on prior data. space positioning satellite parameters in to obtain positioning).
  • the terminal device can adjust the 32K crystal oscillator by periodically waking up the GNSS. For example, the terminal device wakes up the GNSS when the 32K crystal oscillator counts three times, and adjusts the 32K crystal oscillator corresponding to the GNSS to improve the accuracy of the GNSS sleep time based on the 32K crystal oscillator.
  • the terminal device while improving the accuracy of the 32K crystal oscillator in this way, it also increases the power consumption of the terminal device.
  • Embodiments of the present application provide a method and device for GNSS startup of a global navigation satellite system.
  • a terminal device can accurately time the sleep time according to the LTE frame in the Long Term Evolution (Long Term Evolution, LTE) system, Improve the accuracy of the sleep time, which in turn can improve the accuracy of the positioning obtained by starting GNSS through the hot start method.
  • LTE Long Term Evolution
  • an embodiment of the present application provides a method for GNSS activation of a global navigation satellite system, the method includes: receiving a GNSS positioning request; The number of LTE frames received between the GNSS positioning request times; the GNSS sleep time is determined based on the number of LTE frames; the GNSS activation mode is determined based on the GNSS sleep time, and the activation mode is a cold start mode or a hot start mode.
  • the terminal device can accurately obtain the GNSS sleep time based on the LTE frame, and then can determine the GNSS activation mode according to the sleep time, thereby improving the accuracy of the GNSS positioning.
  • the LTE system is time-division multiplexed with the GNSS, and the GNSS sleep time is determined based on the number of LTE frames, the duration of the LTE frames, and the paging cycle of the LTE system.
  • the startup mode of the GNSS is determined to be a hot startup mode; if the dormancy time is greater than the first time threshold, it is determined that the GNSS startup mode is a cold startup mode.
  • the first position information is obtained according to the hot startup mode of the GNSS; if the first position is detected If the distance between the information and the second position information is greater than the distance threshold, it is determined that the GNSS startup mode is a cold start, and the second position information is the position at the end of the last GNSS cold start.
  • the startup mode of the GNSS is after a cold start, and the first value is updated, and the first value is used for recording.
  • an embodiment of the present application provides a global navigation satellite system GNSS starting device, and the global navigation satellite system GNSS starting device includes:
  • a receiving unit for receiving a GNSS positioning request
  • a processing unit configured to determine the number of long-term evolution LTE frames, where the number of LTE frames is the number of LTE frames received between the last GNSS cold start end time and the time when the GNSS positioning request is received;
  • the processing unit is further configured to determine the GNSS sleep time based on the number of the LTE frames
  • the processing unit is further configured to determine a startup mode of the GNSS based on the GNSS sleep time, and the startup mode is a cold start mode or a hot start mode.
  • the LTE system is time-division multiplexed with the GNSS
  • the processing unit is specifically configured to: determine the GNSS sleep time based on the number of the LTE frames, the duration of the LTE frames, and the paging cycle of the LTE system.
  • the processing unit is specifically configured to: if the sleep time is less than or equal to a first time threshold, determine that the startup mode of the GNSS is a hot start mode; if the sleep time is greater than the first time threshold, Then it is determined that the startup mode of the GNSS is the cold startup mode.
  • the processing unit is further configured to: start according to the hot startup mode of the GNSS. GNSS, obtain the first position information; if it is detected that the distance between the first position information and the second position information is greater than the distance threshold, it is determined that the startup mode of the GNSS is a cold start, and the second position information is the last cold start The position of the start end time.
  • the processing unit is further configured to: update the first position information. a value, the first value is used to record the number of times the distance between the first position information and the second position information is greater than the distance threshold; the second value is obtained, the second value is used to record the hot start according to GNSS The number of times that the first position information is acquired in a manner; based on the ratio of the first value to the second value, the first time threshold is updated to obtain a second time threshold.
  • an embodiment of the present application provides a terminal device, where the terminal device includes:
  • a processor which invokes a computer program to perform the following operations:
  • LTE frames Determine the number of long-term evolution LTE frames, and the number of LTE frames is the number of LTE frames received between the end time of the last GNSS cold start and the time of receiving the GNSS positioning request;
  • the startup mode of the GNSS is determined based on the GNSS sleep time, and the startup mode is a cold startup mode or a warm startup mode.
  • an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions used by the user equipment, including a program for executing any of the methods described in the first aspect.
  • the terminal device receives the GNSS positioning request, and determines the number of LTE frames received between the end time of the last GNSS cold start and the moment when the GNSS positioning request is received. Further, the terminal device is based on the number of the LTE frames.
  • the GNSS sleep time is determined, so that the GNSS start mode can be determined based on the GNSS sleep time, and the start mode is a cold start mode or a warm start mode.
  • the terminal device can accurately time the sleep time according to the LTE frame, so as to improve the accuracy of the sleep time, and further improve the accuracy of the positioning obtained by starting the GNSS in the hot start mode.
  • FIG. 1 is a schematic diagram of a working mode of a communication and positioning fusion system provided by an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a GNSS activation method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a method for determining the number of LTE frames provided by an embodiment of the present application
  • FIG. 4 is a schematic diagram of another method for determining the number of LTE frames provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a scenario of GNSS positioning provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another GNSS activation method provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a GNSS activation device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • At least one (item) means one or more
  • plural means two or more
  • at least two (item) means two or three and three
  • “and/or” is used to describe the corresponding relationship between corresponding objects, indicating that there can be three kinds of relationships, for example, “A and/or B” can mean: only A exists, only B exists, and both A and B exist three A case where A and B can be singular or plural.
  • the character “/” generally indicates that the corresponding objects before and after are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, c can be single or multiple.
  • the GNSS activation method in this application can be applied to terminal equipment. It should be known that the terminal equipment mentioned in this application may also be referred to as terminal, user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station , remote station, remote terminal, mobile device, user terminal, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( Wireless terminals in transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • a virtual reality (virtual reality, VR) terminal device an augmented reality (augmented reality, AR) terminal equipment
  • wireless terminals in industrial control wireless terminals in self driving
  • wireless terminals in remote medical wireless terminals in remote medical
  • wireless terminals in smart grid wireless terminals in smart grid
  • transportation security Wireless terminals in transportation safety
  • wireless terminals in smart cities wireless terminals in smart homes, etc.
  • the clock difference is the time of the clock minus the astronomical clock indicating the exact world time at the same instant, that is, the clock difference is the difference between the world time minus the clock time.
  • the size of the clock difference is determined by the difference between the reading of the astronomical clock when it is activated and the universal time, and the clock difference can be determined by radio time synchronization. In other words, the astronomical clock time can be obtained from the clock difference and the time of day.
  • GNSS Global Navigation Satellite System
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • the LTE system and GNSS can be integrated into a single chip system according to the timing characteristics of the LTE system and GNSS.
  • the chip system is the communication positioning fusion system.
  • the LTE system and the GNSS work in a time-division multiplexing manner, as shown in FIG. 1 , which is a working mode of a communication and positioning fusion system.
  • the LTE system has two states (ie, the LTE paging state and the LTE idle state in FIG. 1 ), and the GNSS has two states: a working state and an idle state.
  • the communication fusion system can be regarded as a process of periodic paging of the LTE system, that is, the LTE system searches for a periodic paging process in the LTE system.
  • the calling state and the LTE idle state appear alternately.
  • the terminal device After the terminal device receives the GNSS positioning request, as shown in module 11 in FIG. 1 , the terminal device starts the process of GNSS to obtain the positioning, and this process is a process of time division multiplexing between the LTE system and the GNSS.
  • the GNSS in the process of acquiring the positioning by the GNSS, when the LTE system is in the LTE idle state, the GNSS is in the GNSS working state, that is, the LTE paging state and the GNSS working state are alternately performed in this process.
  • FIG. 2 is a schematic flowchart of a GNSS startup provided by an embodiment of the present application.
  • the GNSS activation method includes steps S201 to S204.
  • S201 Receive a GNSS positioning request.
  • the terminal device receives the GNSS positioning request input by the user.
  • the user opens an application (application, APP) installed on the terminal device to request to obtain the user's current location information, and the APP applies the GNSS technology to obtain the communication positioning technology or the APP can call the positioning APP (
  • the positioning APP applies GNSS technology), in this case, it can be considered that the user sends a GNSS positioning request (or the terminal device receives a GNSS positioning request).
  • S202 Determine the number of LTE frames, where the number of LTE frames is the number of LTE frames received between the end time of the last GNSS cold start and the time when the GNSS positioning request is received.
  • the end time of the last GNSS cold start is the time when the terminal device that is closest to the time of receiving the GNSS positioning request ends cold start GNSS to obtain location information.
  • the terminal device acquires LTE frames through the LTE system at the end of the GNSS cold start (that is, when the acquisition of positioning information through the cold start GNSS is completed), and starts the counter to count the LTE frames.
  • the terminal device receives the GNSS positioning request, it obtains the LTE frame through the LTE system again.
  • the value of the counter is the number of LTE frames.
  • FIG. 3 is a schematic diagram of determining the number of LTE frames.
  • the terminal device completes the cold-start GNSS acquisition of positioning information at time N1, captures the LTE frame at time N1, and starts a counter to count the LTE frames.
  • the terminal device receives the GNSS positioning request at time N2 , it captures the LTE frame at time N2 , and obtains the value of the counter at time N2 , which is the number of LTE frames.
  • the terminal device obtains the LTE frame count as N 1 when the GNSS cold start to obtain the positioning information is completed, and further, the terminal device can use the satellite parameters obtained through the GNSS cold start and the LTE frame count label.
  • N 1 is stored in the storage space.
  • the captured LTE frame count is N 2
  • the terminal device obtains the satellite parameters carrying the count label N 1 from the storage space, and obtains by calculating the difference between N 2 and N 1 Number of LTE frames.
  • the satellite parameters include one or more of satellite navigation messages, satellite orbit parameters, satellite clock correction parameters and system parameters. In this way, the terminal device can still save the prior data (ie, the aforementioned satellite parameters) acquired during the previous cold start after the terminal device is powered off.
  • S203 Determine the GNSS sleep time based on the number of the LTE frames.
  • the terminal device may determine the GNSS sleep time according to the number of LTE frames and the duration of the LTE frames. Exemplarily, if the number of LTE frames is 200 frames, and the duration of the LTE frame is 10ms, the GNSS sleep time is 20000ms (ie, 20s) multiplied by 2000 and 10ms.
  • the LTE system is time-division multiplexed with the GNSS, and the terminal device may determine the GNSS sleep time based on the number of LTE frames, the duration of the LTE frame, and the paging cycle of the LTE system.
  • the LTE system and the GNSS are time-division multiplexed, that is, the GNSS will work only when the LTE is in an idle state in the communication and positioning fusion system.
  • the communication positioning fusion system will respond to the GNSS positioning request in the next LTE idle state of the LTE working state after executing the LTE working state, that is, the next LTE working state.
  • the idle state is the GNSS working state.
  • the LTE paging state and the LTE idle state of the LTE system in the communication and positioning fusion system are performed periodically.
  • the terminal device completes the cold - start GNSS acquisition of positioning information at time N3, captures the LTE frame at time N3, and starts a counter to count LTE frames.
  • the terminal device receives the GNSS positioning request at time N4 in the LTE paging state, it captures the LTE frame at time N4 , and obtains the value of the counter at time N4 , which is the number of LTE frames.
  • the communication and positioning fusion system in the terminal device will respond to the GNSS positioning request at the next LTE idle state start time (ie, time N5 in FIG.
  • the sleep time of the GNSS is the duration between time N5 and time N3.
  • the GNSS sleep time is determined in combination with the LTE paging cycle of the LTE system, which can improve the accuracy of the determined GNSS sleep time.
  • S204 Determine a startup mode of the GNSS based on the GNSS sleep time, and the startup mode is a cold startup mode or a hot startup mode.
  • the terminal device determines whether there is a priori data according to the GNSS sleep time, that is, the terminal device determines, based on the GNSS sleep time, whether there are satellite parameters acquired by the GNSS in the previous cold start, or whether the satellite parameters acquired by the GNSS in the previous cold start are valid and available.
  • the sleep time is less than or equal to the first time threshold, it is determined that the startup mode of the GNSS is the hot startup mode. If the sleep time is greater than the first time threshold, it is determined that the startup mode of the GNSS is the cold startup mode.
  • the first time threshold is set by the developer. Since the ephemeris (orbital parameters of the satellite) in the satellite parameters is affected by the solar system radiation or gravity, the satellite orbit may be shifted, so the ephemeris will expire every 2 hours, and the ground The detection station also injects new orbit information into the satellite regularly, so the first time threshold is generally set to 2 hours.
  • the first time threshold is 2 hours
  • the terminal device determines that the GNSS startup mode is the cold start mode, that is, the terminal device cold starts the GNSS, Acquire satellite parameters of multiple satellites, and determine the location information of the terminal device according to the satellite parameters.
  • the terminal device receives the first positioning request, and obtains the satellite parameters sent by the four satellites (Satellite 1, Satellite 2, Satellite 3 and Satellite 4) as shown in Figure 5: satellite navigation message, satellite orbit parameters, satellite clock Calibration parameters and system parameters.
  • the terminal device can determine the time when the signal sent by satellite 1 reaches the terminal device according to the time when it sends the request to obtain satellite parameters to the satellite and the time when it receives the satellite parameters, and the time when the signal sent by satellite 2 reaches the terminal device is ⁇ t 1 t 2 , the time when the signal sent by the satellite 3 reaches the terminal device is ⁇ t 3 , and the time when the signal sent by the satellite 4 reaches the terminal device is ⁇ t 4 . Further, the terminal device can measure the distance between each satellite and the terminal device according to formula (1).
  • c is the propagation speed of the signal (that is, the speed of light)
  • ⁇ t i is the time when the signal sent by the i-th satellite reaches the terminal device
  • d i is the pseudo-range between the i-th satellite and the terminal device (the reason is due to the existence of The influence of various errors, not the real distance)
  • i can be 1, 2, 3, 4.
  • the terminal device obtains the space rectangular coordinates of satellite 1 corresponding to satellite 1 at time t according to the satellite navigation messages of each satellite as (x 1 , y 1 , z 1 ), and the space rectangular coordinates of satellite 2 at time t are (x 1 , y 1 , z 1 ). 2 , y 2 , z 2 ), the space rectangular coordinates of satellite 3 at time t are (x 3 , y 3 , z 3 ), and the space rectangular coordinates of satellite 4 at time t are (x 4 , y 4 , z 4 ) .
  • the satellite clock error of satellite 1 obtained from the satellite ephemeris is t 1
  • the satellite clock error of satellite 2 is t 2
  • the satellite clock error of satellite 3 is t 3
  • the satellite clock error of satellite 4 is t 4 .
  • the terminal device can determine the position (x, y, z) of the terminal device (terminal device) and the clock difference t of the terminal device according to the position information of the four satellites and formula (2).
  • d 1 is the pseudo-range between satellite 1 and the terminal device
  • d 2 is the pseudo-range between satellite 2 and the terminal device
  • d 3 is the pseudo-range between satellite 3 and the terminal device
  • d 4 is the pseudo-range between satellite 4 and the terminal device. Pseudoranges between end devices.
  • c is the speed of propagation of the signal (ie the speed of light).
  • the first time threshold is 2 hours
  • the terminal device determines that the GNSS startup mode is the hot start mode, that is, the terminal device is warmly started.
  • the location information of the terminal device is determined according to the prior data (satellite parameters of multiple satellites obtained during the last cold start of GNSS) and the aforementioned formulas (1) and (2) to complete a quick start. In this way, the terminal device can accurately infer the precise time of satellite signal transmission from the satellite according to the sleep time, so that a quick positioning can be completed without having to re-decode satellite parameters such as ephemeris.
  • the terminal device can use the LTE system in the traffic positioning fusion system to obtain the LTE frame to accurately time the sleep time, improve the accuracy of the sleep time, and then start the GNSS in the hot start mode to obtain positioning. accuracy.
  • FIG. 6 is a schematic flowchart of another GNSS startup provided by an embodiment of the present application. As shown in FIG. 6 , this includes steps S601 to S606.
  • S601 Receive a GNSS positioning request.
  • S602 Determine the number of LTE frames, where the number of LTE frames is the number of LTE frames received between the end time of the last GNSS cold start and the time when the GNSS positioning request is received.
  • S603 Determine the GNSS sleep time based on the number of the LTE frames.
  • S604 Determine a startup mode of the GNSS based on the GNSS sleep time, and the startup mode is a hot startup mode.
  • the terminal device rapidly acquires the first location information of the terminal device by hot-starting GNSS according to the prior data obtained at the last cold-start GNSS completion time at the time of receiving the GNSS positioning request.
  • the distance threshold is set by the developer, and can be adjusted accordingly according to the specific application scenario, which is not specifically limited in this application.
  • the terminal device stores the location information in the storage space after cold-starting the GNSS to obtain the location information, which is recorded as the second location information, and the second location information is updated according to the location information obtained each time the GNSS is cold-started. After the terminal device determines to obtain the first location information by using the hot-start GNSS, it calculates the distance between the first location information and the second location information, and detects whether the distance is greater than the distance threshold.
  • the terminal device deletes the first location information obtained by the hot start this time (that is, the terminal device does not provide the first location information to user), the terminal device acquires the second location information of the terminal device by cold-starting the GNSS, and can output the second location information. In this way, the accuracy of the GNSS positioning information output by the terminal device can be improved.
  • the distance threshold is 200 kilometers.
  • the terminal device cold starts GNSS to obtain the second location information it saves the coordinates P of the second location information.
  • the number of LTE frames between the time when the GNSS is started is completed, and the distance between the coordinate O and the coordinate P of the first position information obtained by the hot-start GNSS is calculated after determining the location information obtained by the hot-start GNSS. If the distance between the coordinate O and the coordinate P is greater than 200 kilometers, the terminal device cold starts GNSS, obtains the position information coordinate Q of the terminal device, and outputs the position information coordinate Q.
  • the terminal device may also update the first value, the first value of the first value.
  • the value is used to record the number of times that the distance between the first location information and the second location information is greater than the distance threshold.
  • the terminal device obtains a second value, and the second value is used to record the total number of times that the first position information is obtained according to the hot start mode of GNSS. Further, the terminal device updates the first time based on the ratio of the first value to the second value.
  • the threshold is the second time threshold.
  • the terminal device After the terminal device starts the GNSS in the hot-start mode to obtain the second position information, and detects that the distance between the second position information and the first position information obtained by the GNSS in the previous cold start is greater than the preset threshold, it is determined that the second position information has error, and record the number of times the second position information is wrong as the first value.
  • the terminal device obtains the error rate of the position information obtained by the hot start GNSS by calculating the ratio of the first value to the total number of times (that is, the second value above) that the hot start GNSS obtains the first position information, if the error rate ( That is, the ratio of the first value to the second value) is greater than the preset error threshold, then the first time threshold is adjusted and updated to obtain the second time threshold.
  • the preset error threshold is set by the developer according to a specific application scenario, and there is no specific limitation on this.
  • the terminal device obtains a first numerical value (the number of times the cold-start GNSS obtains the position information after the warm-start GNSS obtains the position information error) is 4, and the second numerical value (the total number of times the warm-start GNSS obtains the position information) is 4.
  • the ratio of the first value to the second value calculated by the terminal device is 0.4 greater than If the preset threshold of the terminal device is 0.2, the terminal device can shorten the first time threshold of 2 hours by 0.3 hours, that is, update and adjust the first time threshold to the second time threshold of 1.7 hours.
  • the terminal device can shorten the first time threshold of 2 hours by 0.5 hours, that is, update and adjust the first time threshold to the second time threshold of 1.5 hours.
  • the terminal device can verify the first position information and judge the accuracy of the first position information. If the first location information is incorrect, the terminal device starts the GNSS in a cold start mode to obtain its own location information. Through this activation method, the accuracy of the location information output by the terminal device through the GNSS can be improved.
  • FIG. 7 is a schematic structural diagram of a GNSS activation apparatus provided by an embodiment of the present invention.
  • the GNSS activation apparatus is configured in a terminal device, and the GNSS activation apparatus 70 may include:
  • a receiving unit 701 configured to receive a GNSS positioning request
  • a processing unit 702 configured to determine the number of long-term evolution LTE frames, where the number of LTE frames is the number of LTE frames received between the last GNSS cold start end time and the time when the GNSS positioning request is received;
  • the processing unit 702 is further configured to determine the GNSS sleep time based on the number of the LTE frames;
  • the processing unit 702 is further configured to determine a startup mode of the GNSS based on the GNSS sleep time, and the startup mode is a cold startup manner or a hot startup manner.
  • the LTE system is time-division multiplexed with the GNSS
  • the processing unit 702 is specifically configured to: determine the GNSS sleep time based on the number of the LTE frames, the duration of the LTE frames, and the paging cycle of the LTE system.
  • processing unit 702 is specifically configured to:
  • the startup mode of the GNSS is a hot startup mode
  • the startup mode of the GNSS is a cold startup mode.
  • processing unit 702 is further configured to:
  • the GNSS startup mode is a cold start
  • the second position information is the position at the end of the last GNSS cold start.
  • the processing unit 702 is further configured to: update a first value, where the first value is used to record the number of times that the distance between the first position information and the second position information is greater than a distance threshold;
  • the second numerical value is used to record the total number of times that the first position information is obtained according to the hot start mode of GNSS;
  • the first time threshold is updated to a second time threshold.
  • each unit module of the GNSS activation device described in the embodiment of the present invention may be specifically implemented according to the method in the method embodiment described in FIG. 2 or FIG. 6 , and the specific implementation process may refer to FIG. 2 or FIG. 6 . The relevant description of the method embodiment of 6 is not repeated here.
  • FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 80 described in the embodiments of this application includes: a processor 801 and a memory 802, and the processor 801 and the memory 802 are connected through one or more communication buses.
  • the above-mentioned processor 801 can be a central processing unit (Central Processing Unit, CPU), and the processor can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC) ), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the processor 801 is configured to support the user equipment to perform the corresponding functions of the terminal equipment in the methods described in FIG. 2 and FIG. 6 .
  • the above-mentioned memory 802 may include read-only memory and random access memory, and provides computer programs and data to the processor 801 .
  • a portion of memory 802 may also include non-volatile random access memory.
  • the number of LTE frames is the number of LTE frames received between the last GNSS cold start end time and the time when the GNSS positioning request is received;
  • a GNSS startup mode is determined based on the GNSS sleep time, and the startup mode is a cold startup mode or a warm startup mode.
  • the LTE system is time-division multiplexed with the GNSS
  • the processor 801 is specifically configured to: determine the GNSS dormancy based on the number of the LTE frames, the duration of the LTE frames, and the paging cycle of the LTE system time.
  • the processor 801 is specifically used for:
  • the startup mode of the GNSS is a hot startup mode
  • the startup mode of the GNSS is a cold startup mode.
  • the processor 801 is further configured to: start the GNSS according to the hot start mode of the GNSS, and obtain the first position information;
  • the GNSS startup mode is a cold start
  • the second position information is the position at the end of the last GNSS cold start.
  • the processor 801 is further configured to: update a first value, where the first value is used to record that the distance between the first position information and the second position information is greater than a distance threshold frequency;
  • the second numerical value is used to record the total number of times that the first position information is obtained according to the hot start mode of GNSS;
  • the first time threshold is updated to a second time threshold.
  • the processor 801 may be a central processing unit (Central Processing Unit, CPU), and the processor 801 may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP) ), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory 802 may include read only memory and random access memory, and provides instructions and data to the processor 801 .
  • a portion of memory 802 may also include non-volatile random access memory.
  • memory 802 may also store device type information.
  • the processor 801 and the memory 802 described in the embodiment of the present invention may execute the implementation manner described in the method embodiment described in FIG. 2 or FIG. 6 provided in the embodiment of the present invention, and may also execute the embodiment of the present invention.
  • the implementation method of the GNSS activation device described in FIG. 7 is provided, which will not be repeated here.
  • each module/unit included in each device and product described in the above embodiments it may be a software module/unit, a hardware module/unit, or a part of a software module/unit and a part of a hardware module/unit .
  • each module/unit included in the product may be implemented by hardware such as a circuit, or at least some modules/units may be implemented by a software program, and the software program runs Since the processor is integrated inside the chip, the remaining (if any) modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, each module/unit included can be implemented using It is realized by hardware such as circuits, and different modules/units can be located in the same piece of the chip module (such as chips, circuit modules, etc.) or in different components, or at least some modules/units can be realized by software programs.
  • the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the terminal, the modules/units contained therein can be all It is implemented by means of hardware such as circuits, and different modules/units may be located in the same component (eg, chip, circuit module, etc.) or in different components in the terminal, or at least some modules/units may be implemented by means of software programs.
  • the program runs on the processor integrated inside the terminal, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits.
  • This embodiment of the present application further provides a computer-readable storage medium, where the readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program can be used to implement the embodiments corresponding to FIG. 2 and FIG. 6 of the present application.
  • the GNSS activation method described in the embodiment is not repeated here.
  • the computer-readable storage medium may be an internal storage unit of the terminal device described in any of the foregoing embodiments, such as a hard disk or a memory of the device.
  • the computer-readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the device, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, Flash Card, etc.
  • the computer-readable storage medium may also include both an internal storage unit of the terminal device and an external storage device.
  • the computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device.
  • the computer-readable storage medium can also be used to temporarily store data that has been or will be output.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.

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Abstract

一种全球导航卫星系统GNSS启动方法及装置，其中，全球导航卫星系统GNSS启动方法包括：接收GNSS定位请求（S601）；确定长期演进LTE帧数量，LTE帧数量为上一次GNSS冷启动结束时刻至接收GNSS定位请求的时刻之间接收到的LTE帧的数量（S602）；基于LTE帧的数量确定GNSS休眠时间（S603）；基于GNSS休眠时间确定GNSS的启动方式，启动方式为冷启动方式或热启动方式；通过这样的方式，终端设备通过LTE帧对休眠时间进行计时，提升休眠时间的准确性。

Description

一种全球导航卫星系统GNSS启动方法及装置 技术领域
本申请涉及通信定位技术领域，尤其涉及一种全球导航卫星系统GNSS启动方法及装置。
背景技术
全球导航卫星系统(Global Navigation Satellite System，GNSS)是能在地球表面或近地空间的任何地点为用户提供全天候的3维坐标和速度以及时间信息的空基无线电导航定位系统。在该通信定位芯片融合系统中，GNSS休眠的过程中会通常会采用芯片的32K晶振计数以确定GNSS的休眠时间，以便GNSS接收到下一次定位需求后，可以根据该休眠时间确定启动GNSS的方式，进而启动GNSS获取终端设备的位置信息。其中，启动GNSS的方式包括冷启动方式(即GNSS无任何先验数据，获取航天定位卫星参数并根据该航天定位参数获取定位)和热启动方式(即GNSS存在先验数据，可以根据先验数据中的航天定位卫星参数获取定位)。
但由于32K晶振容易受运行环境的环境温度影响，导致频偏增加的情况，故而采用此方法得到的GNSS休眠时间准确性较低，从而导致无法准确确定终端设备的位置信息。为了提升GNSS休眠时间的准确性，终端设备可以通过周期性地唤醒GNSS的方式，对32K晶振进行调整。例如，终端设备在32K晶振计数达到3次时唤醒GNSS，并对GNSS对应的32K晶振进行调整，以提升基于32K晶振得到的GNSS休眠时间的准确性。但通过这样的方式提升了32K晶振准确性的同时，也会增加终端设备的功耗。
发明内容
本申请实施例提供了一种全球导航卫星系统GNSS启动方法及装置，通过本申请提供的方法，终端设备可以根据长期演进(Long Term Evolution，LTE)系统中的LTE帧对休眠时间进行准确计时，提升休眠时间的准确性，进而可以提升通过热启动方式启动GNSS获取定位的准确性。
第一方面，本申请实施例提供了一种全球导航卫星系统GNSS启动方法，该方法包括：接收GNSS定位请求；确定长期演进LTE帧数量，该LTE帧数量为上一次GNSS冷启动结束时刻至接收GNSS定位请求时刻之间接收到的LTE帧的数量；基于LTE帧的数量确定GNSS休眠时间；基于该GNSS休眠时间确定GNSS的启动方式，该启动方式为冷启动方式或热启动方式。
可见，通过这样的GNSS启动方法，终端设备可以基于LTE帧准确获取GNSS的休眠时间，进而可以根据该休眠时间确定GNSS的启动方式，提升GNSS获取定位的准确性。
一种可能的实现方式中，LTE系统与GNSS时分复用，基于LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
一种可能的实现方式中，若休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；若休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方 式。
一种可能的实现方式中，若休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式之后，根据GNSS的热启动方式，获取第一位置信息；若检测到第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，第二位置信息为上一次GNSS冷启动结束时刻的位置。
一种可能的实现方式中，若检测到第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，更新第一数值，第一数值用于记录第一位置信息与第二位置信息之间的距离大于距离阈值的次数；获取第二数值，第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；基于第一数值与第二数值之比，更新第一时间阈值得到第二时间阈值。
第二方面，本申请实施例提供了一种全球导航卫星系统GNSS启动装置，所述全球导航卫星系统GNSS启动装置包括：
接收单元，用于接收GNSS定位请求；
处理单元，用于确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
所述处理单元，还用于基于所述LTE帧的数量确定GNSS休眠时间；
所述处理单元，还用于基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
一种可能的实现中，LTE系统与所述GNSS时分复用，所述处理单元具体用于：基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
一种可能的实现中，所述处理单元具体用于：若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
一种可能的实现中，若所述休眠时间小于或等于第一时间阈值，所述处理单元确定GNSS的启动方式为热启动方式之后，所述处理单元还用于：根据GNSS的热启动方式启动GNSS，获取第一位置信息；若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次冷启动结束时刻的位置。
一种可能的实现中，若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，所述处理单元还用于：更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的次数；基于所述第一数值与所述第二数值之比，更新所述第一时间阈值得到第二时间阈值。
第三方面，本申请实施例提供了一种终端设备，所述终端设备包括：
存储器，用于存储计算机程序；
处理器，调用计算机程序，用于执行以下操作：
接收GNSS定位请求；
确定长期演进LTE帧数量，LTE帧数量为上一次GNSS冷启动结束时刻至接收GNSS 定位请求时刻之间接收到的LTE帧的数量；
基于LTE帧的数量确定GNSS休眠时间；
基于GNSS休眠时间确定GNSS的启动方式，启动方式为冷启动方式或热启动方式。
第四方面，本申请实施例提供一种计算机可读存储介质，用于储存上述用户设备所用的计算机软件指令，其包括用于执行上述第一方面任一所述的方法所涉及的程序。
本申请实施例中，终端设备接收GNSS定位请求，并确定上一次GNSS冷启动结束时刻至接收该GNSS定位请求时刻之间接收到的LTE帧的数量，进一步地，终端设备基于该LTE帧的数量确定GNSS休眠时间，从而可以基于该GNSS休眠时间确定GNSS的启动方式，该启动方式为冷启动方式或热启动方式。通过这样的方法，终端设备可以根据LTE帧对休眠时间进行准确计时，以提升休眠时间的准确性，进而可以提升通过热启动方式启动GNSS获取定位的准确性。
附图说明
图1为本申请实施例提供的一种通信定位融合系统的工作模式的示意图；
图2为本申请实施例提供的一种GNSS启动方法的流程示意图；
图3为本申请实施例提供的一种确定LTE帧数量的方法示意图；
图4为本申请实施例提供的另一种确定LTE帧数量的方法示意图；
图5为本申请实施例提供的一种GNSS定位的场景示意图；
图6为本申请实施例提供的另一种GNSS启动方法的流程示意图；
图7为本申请实施例提供的一种GNSS启动装置的结构示意图；
图8为本申请实施例提供的一种终端设备的结构示意图。
具体实施方式
本申请实施例提供一种全球导航卫星系统GNSS启动方法及装置，为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列操作或单元的过程、方法、系统、产品或设备没有限定于已列出的操作或单元，而是可选地还包括没有列出的操作或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它操作或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于描述对应对象的对应关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后对应对象是一种“或” 的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
本申请中的GNSS启动方法可应用于终端设备，需要知晓的是，本申请所提及的终端设备也可以称为终端、用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
为便于理解本申请公开的实施例，首先对本申请实施例涉及的一些概念进行阐述。这些概念的阐述包括但不限于以下内容。
钟差：天文钟虽然比较准确,但也存在误差。钟差是在同一瞬间指示准确世界时的钟时减去天文钟的时间，即钟差为世界时减去钟时的差值。钟差的大小是由启动时天文钟的读数和世界时的差别决定的，钟差可用无线电对时法测定。换而言之，可以根据钟差和时间时获得天文钟时。
全球导航卫星定位系统(Global Navigation Satellite System，GNSS)：是利用一组卫星的伪距、星历、卫星发射时间等观测量，能在地球表面或近地空间的任何地点为用户提供全天候的3维坐标、速度以及时间信息的空基无线电导航定位系统。如果卫星除了要知道经纬度还想知道高度的话，接收机(或称为终端设备)必须对收到4颗卫星才能准确定位。
长期演进(Long Term Evolution，LTE)系统：是由第三代合作伙伴计划(The 3rd Generation Partnership Project，3GPP)组织制定的通用移动通信系统(Universal Mobile Telecommunications System，UMTS)技术标准的长期演进。
通信定位融合系统：在芯片开发制作时为了节省硬件资源开销，可以根据LTE系统和GNSS的时序特性，将LTE系统和GNSS融合于一个芯片系统中，该芯片系统即是通信定位融合系统。在该通信定位融合系统中，LTE系统和GNSS是采用时分复用的方式进行工作，具体如图1所示，图1为一种通信定位融合系统的工作模式。在该通信定位融合系统中，LTE系统存在两种状态(即图1中LTE寻呼态和LTE空闲态)，GNSS存在两种状态：工作态和空闲态。当终端设备未接收到GNSS定位需求时，如图1中模块10所示为该通信融合系统可视为LTE系统周期性寻呼的过程，即在该LTE系统周期性寻呼的过程中LTE寻呼态和LTE空闲态交替出现。当终端设备接收GNSS定位请求后，如图1中模块11所示为终端设备启动GNSS获取定位的过程，该过程为LTE系统和GNSS进行时分复用的过程。换而言之，在该GNSS获取定位的过程中，在LTE系统处于LTE空闲态时GNSS处于GNSS工作态，即在该过程中LTE寻呼态与GNSS工作态交替进行。
为了更好地理解本申请提供的方案，下面将结合本申请实施例中的附图，对本申请实施例进行阐述。
请参见图2，图2是本申请实施例提供的一种GNSS启动的流程示意图。如图2所示，该GNSS启动方法包括步骤S201-步骤S204。
S201：接收GNSS定位请求。
终端设备接收用户输入的GNSS定位请求。示例性地，在一个应用场景中，用户打开终端设备上安装的应用程序(application，APP)请求获取用户当前位置信息，该APP应用有GNSS技术获取通信定位的技术或该APP能调用定位APP(该定位APP应用有GNSS技术)，在这样的情况下，则可将视为用户发送了GNSS定位请求(或终端设备接收GNSS定位请求)。
S202：确定LTE帧数量，该LTE帧数量为上一次GNSS冷启动结束时刻至接收GNSS定位请求时刻之间接收到的LTE帧的数量。
需要知晓的是，上一次GNSS冷启动结束时刻为距离接收GNSS定位请求时刻最近的一次终端设备冷启动GNSS获取位置信息结束的时刻。
终端设备在GNSS冷启动结束时刻(即通过冷启动GNSS获取定位信息完成时)，通过LTE系统获取LTE帧，并开启计数器进行LTE帧计数。当终端设备接收到GNSS定位请求时，再次通过LTE系统获取LTE帧，此时(终端设备接收到GNSS定位请求时)计数器的数值即为LTE帧数量。
示例性地如图3所示，图3为一个确定LTE帧数量的示意图。终端设备在N 1时刻完成冷启动GNSS的获取定位信息，并捕获N 1时刻的LTE帧，开启计数器进行LTE帧的计数。当终端设备在N 2时刻接收到GNSS定位请求时，捕获N 2时刻的LTE帧，并获取在N 2时刻计数器的数值，该数值即为LTE帧数量。
一种可行的实施方式中，终端设备在GNSS冷启动获取定位信息完成时，获取LTE帧计数为N 1，进一步地，终端设备可以将通过GNSS冷启动获取到的卫星参数和该LTE帧计数标签N 1存储于存储空间中。当终端设备接收GNSS定位请求后，捕获LTE帧计数为N 2，进一步地，终端设备从存储空间中获取携带有计数标签N 1的卫星参数，通过计算N 2和N 1之间的差值获取LTE帧数量。其中，卫星参数包括：卫星导航电文、卫星的轨道参数、卫星时钟校正参数和系统参数中的一种或多种。通过这样的方式，使得终端设备在关机断电后依然可以保存前一次冷启动时获取的先验数据(即前述卫星参数)。
S203：基于该LTE帧的数量确定GNSS休眠时间。
终端设备可以根据LTE帧的数量和LTE帧的时长确定GNSS休眠时间。示例性地，若LTE帧的数量为200帧，LTE帧的时长为10ms，则GNSS休眠时间为2000与10ms的乘积20000ms(即20s)。
一种可行的实施方式中，LTE系统与GNSS时分复用，终端设备可以基于LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
由于在通信定位融合系统中，LTE系统与GNSS时分复用，即该通信定位融合系统中LTE空闲态时GNSS才会工作。当终端设备在LTE工作态时接收到该GNSS定位请求，则通信定位融合系统将执行完此LTE工作态后，在该LTE工作态的下一个LTE空闲态响应该GNSS定位请求，即下一个LTE空闲态为GNSS工作态。
示例性地，如图4所示，通信定位融合系统中LTE系统的LTE寻呼态和LTE空闲态 周期进行。终端设备在N 3时刻完成冷启动GNSS的获取定位信息，并捕获N 3时刻的LTE帧，开启计数器进行LTE帧的计数。当终端设备在LTE寻呼态中的N 4时刻接收到GNSS定位请求时，捕获N 4时刻的LTE帧，并获取在N 4时刻计数器的数值，该数值即为LTE帧数量。则终端设备中的通信定位融合系统将执行完此LTE工作态后，在该LTE工作态的下一个LTE空闲态开始时刻(即图4中的N 5时刻)响应该GNSS定位请求。换而言之，GNSS的休眠时间即为N 5时刻与N 3时刻之间的时长。通过这样的方式，结合LTE系统的LTE寻呼周期来确定GNSS的休眠时间，可以提升确定的GNSS休眠时间的准确性。
S204：基于GNSS休眠时间确定GNSS的启动方式，该启动方式为冷启动方式或热启动方式。
终端设备根据GNSS休眠时间来确定是否存在先验数据，即终端设备基于该GNSS休眠时间确定是否存在前一次冷启动GNSS获取的卫星参数，或确定前一次冷启动GNSS获取的卫星参数是否有效可用。
一种可能的实现中，若该休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式。若该休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。其中，第一时间阈值由开发人员设定，由于卫星参数中的星历(卫星的轨道参数)受太阳系辐射或引力影响，卫星轨道可能会偏移，因此每隔2小时星历都会过期，地面检测站也会定时向卫星注入新的轨道信息，故而一般将第一时间阈值设定为2小时。
示例性地，在一个应用场景中，该第一时间阈值为2小时，若该GNSS休眠时间大于第一时间阈值，则终端设备确定GNSS的启动方式为冷启动方式，即终端设备冷启动GNSS，获取多个卫星的卫星参数，并根据该卫星参数确定终端设备的位置信息。t时刻终端设备接收第一定位请求，获取如图5中所示的4颗卫星(卫星1、卫星2、卫星3和卫星4)发送的卫星参数：卫星导航电文、卫星的轨道参数、卫星时钟校正参数和系统参数。终端设备可以根据自身向卫星发送获取卫星参数请求的时间和接收到卫星参数的时间，测定卫星1发送的信号到达终端设备的时间为△t 1、卫星2发送的信号到达终端设备的时间为△t 2、卫星3发送的信号到达终端设备的时间为△t 3、卫星4发送的信号到达终端设备的时间为△t 4。进一步地，终端设备可以根据公式(1)测算各颗卫星与终端设备之间的距离。
d i＝c×Δt i  (1)
其中，c为信号的传播速度(即光速)，△t i为第i颗卫星发送的信号到达终端设备的时间，d i为第i颗卫星与终端设备之间的伪距(原因是由于存在各种误差的影响，并不是真正的距离)，i可以为1、2、3、4。
进一步地，终端设备根据各颗卫星的卫星导航电文获取卫星1对应的卫星1在t时刻的空间直角坐标为(x 1、y 1、z 1)，卫星2在t时刻空间直角坐标为(x 2、y 2、z 2)，卫星3在t时刻的空间直角坐标为(x 3、y 3、z 3)，卫星4在t时刻的空间直角坐标为(x 4、y 4、z 4)。由卫星星历求得的卫星1的卫星钟差为t 1,卫星2的卫星钟差为t 2,卫星3的卫星钟差为t 3，卫星4的卫星钟差为t 4。进而，终端设备可以根据4颗卫星的位置信息和公式(2)确定终端设备(终端设备)的位置(x，y，z)和终端设备的钟差t。
Figure PCTCN2021137106-appb-000001
其中，d 1为卫星1到终端设备之间的伪距、d 2为卫星2到终端设备之间的伪距、d 3为卫星3到终端设备之间的伪距、d 4为卫星4到终端设备之间的伪距。c为信号的传播速度(即光速)。
示例性地，在一个应用场景中，该第一时间阈值为2小时，若该GNSS休眠时间小于或等于第一时间阈值，则终端设备确定GNSS的启动方式为热启动方式，即终端设备热启动GNSS，根据先验数据(上一次冷启动GNSS时获取的多个卫星的卫星参数)和前述公式(1)和公式(2)确定终端设备的位置信息，完成一次快速启动。通过这样的方式，终端设备能够根据休眠时间准确推断出卫星的卫星信号发射的精确时间，从而不必重新解码星历等卫星参数，即可完成一次快速定位。
可见，通过这样的GNSS启动方法，终端设备可以利用通行定位融合系统中LTE系统，获取LTE帧以对休眠时间进行准确计时，提升休眠时间的准确性，进而可以提升通过热启动方式启动GNSS获取定位的准确性。
请参见图6，图6是本申请实施例提供的另一种GNSS启动的流程示意图。如图6所示，该包括步骤S601-步骤S606。
S601：接收GNSS定位请求。
S602：确定LTE帧数量，该LTE帧数量为上一次GNSS冷启动结束时刻至接收GNSS定位请求时刻之间接收到的LTE帧的数量。
S603：基于该LTE帧的数量确定GNSS休眠时间。
S604：基于GNSS休眠时间确定GNSS的启动方式，该启动方式为热启动方式。
其中，步骤S601-步骤S604的具体实现方式可参见前述实施例中步骤S201-步骤S204的具体实现方式中的相关描述，在此不再进行过多赘述。
S605：根据GNSS的热启动方式，获取第一位置信息。
终端设备根据接收GNSS定位请求时刻的上一次冷启动GNSS完成时刻获取的先验数据，热启动GNSS快速地获取终端设备的第一位置信息。
S606：若检测到该第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，该第二位置信息为上一次GNSS冷启动结束时刻的位置。
其中，距离阈值由开发人员设定，后续可根据具体应用场景进行相应的调整，本申请对此不做具体限定。
终端设备在冷启动GNSS获取位置信息后，存储该位置信息于存储空间，记为第二位置信息，该第二位置信息根据每次冷启动GNSS获取的位置信息进行更新。当终端设备确定以热启动GNSS获取第一位置信息后，计算该第一位置信息和第二位置信息之间的距离，并检测该距离是否大于距离阈值。若该距离大于距离阈值，则确定此次热启动GNSS获取 的第一位置信息不够准确，进而终端设备删除此次热启动获取的第一位置信息(即终端设备不将该第一位置信息提供给用户)，终端设备通过冷启动GNSS获取终端设备的第二位置信息，并可以将输出该第二位置信息。通过这样的方式，可以提升终端设备输出的GNSS定位信息的准确性。
示例性地，该距离阈值为200公里，在这样的情况下，终端设备冷启动GNSS获取第二位置信息后，保存第二位置信息的坐标P，当终端设备基于GNSS定位请求的时刻与该冷启动GNSS完成时刻之间LTE帧的数量，确定以热启动GNSS获取位置信息后，计算热启动GNSS获取的第一位置信息的坐标O与坐标P之间的距离。若坐标O与坐标P之间的距离大于200公里，则终端设备冷启动GNSS，获取到该终端设备的位置信息坐标Q，并输出位置信息坐标Q。
在一个可行的实施中，若检测到第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，终端设备还可以更新第一数值，该第一数值用于记录第一位置信息与第二位置信息之间的距离大于距离阈值的次数。终端设备获取第二数值，该第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数，进一步地，终端设备基于该第一数值与第二数值之比，更新第一时间阈值为第二时间阈值。
终端设备在以热启动方式启动GNSS获取第二位置信息后，检测到第二位置信息于前一次冷启动GNSS获取的第一位置信息之间距离大于预设阈值，则确定该第二位置信息有误，并记录第二位置信息有误的次数为第一数值。终端设备通过计算该第一数值与热启动GNSS获取第一位置信息的总次数(即上文的第二数值)之比，以获得热启动GNSS得到的位置信息的错误率，若该错误率(即第一数值与第二数值之比)大于预设误差阈值，则对第一时间阈值进行调整更新，得到第二时间阈值。其中，预设误差阈值为开发人员根据具体应用场景设定，对此不做具体限定。
示例性地，在一个应用场景中，终端设备获取第一数值(热启动GNSS获取位置信息错误后，冷启动GNSS获取位置信息的次数)为4、第二数值(热启动GNSS获取位置信息的总次数，包括热启动GNSS获取位置信息正确的次数，以及热启动GNSS获取位置信息错误后冷启动GNSS获取位置信息的次数)为10，则终端设备计算第一数值与第二数值之比为0.4大于终端设备的预设阈值0.2，则终端设备可以将该第一时间阈值2小时缩短0.3小时，即将该第一时间阈值更新调整为第二时间阈值1.7小时。
示例性地，在一个应用场景中，第一数值与第二数值之间的比值范围和时间阈值变化量之间的关系如表1所示。
表1
第一数值与第二数值之间的比值范围 时间阈值变化量
[0，0.1] 0h
(0.1，0.5] 0.5h
(0.5，1] 1h
若终端设备计算第一数值与第二数值之比为0.4，则终端设备可以将该第一时间阈值2小时缩短0.5小时，即将该第一时间阈值更新调整为第二时间阈值1.5小时。
可见，通过这样的接收方式，终端设备通过热启动方式，启动GNSS获取自身的第一 位置信息后，终端设备可以对该第一位置信息进行验证，判断该第一位置信息的准确性，若该第一位置信息有误，则终端设备通过冷启动方式启动GNSS获取自身的位置信息。通过该种启动方式，可以提升终端设备通过GNSS输出的位置信息的准确性。
参见图7，图7是本发明实施例提供的一种GNSS启动装置的结构示意图，所述GNSS启动装置配置于终端设备中，所述GNSS启动装置70可以包括：
接收单元701，用于接收GNSS定位请求；
处理单元702，用于确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
所述处理单元702，还用于基于所述LTE帧的数量确定GNSS休眠时间；
所述处理单元702，还用于基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
在一个可能的实现中，LTE系统与所述GNSS时分复用，所述处理单元702具体用于：基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
在一个可能的实现中，所述处理单元702具体用于：
若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
在一个可能的实现中，所述处理单元702还用于：
根据GNSS的热启动方式启动GNSS，获取第一位置信息；
若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
在一个可能的实现中，所述处理单元702还用于：更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
需要说明的是，本发明实施例所描述的GNSS启动装置的各单元模块的功能可根据图2或者图6所述的方法实施例中的方法具体实现，其具体实现过程可以参照图2或者图6的方法实施例的相关描述，此处不再赘述。
请参见图8，图8为本申请实施例提供的一种终端设备的结构示意图。本申请实施例中所描述的终端设备80，包括：处理器801、存储器802，处理器801和存储器802通过一条或多条通信总线连接。
上述处理器801可以是中央处理单元(Central Processing Unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field-Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。处理器801 被配置为支持用户设备执行图2和图6所述方法中终端设备相应的功能。
上述存储器802可以包括只读存储器和随机存取存储器，并向处理器801提供计算机程序和数据。存储器802的一部分还可以包括非易失性随机存取存储器。其中，所述处理器801调用所述计算机程序时用于执行：
接收GNSS定位请求；
确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
基于所述LTE帧的数量确定GNSS休眠时间；
基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
在一种可能的实现方式中，LTE系统与所述GNSS时分复用，所述处理器801具体用于：基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
在一种可能的实现方式中，所述处理器801具体用于：
若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
在一种可能的实现方式中，所述处理器801还用于：根据GNSS的热启动方式启动GNSS，获取第一位置信息；
若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
在一种可能的实现方式中，所述处理器801还用于：更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
应当理解，在本发明实施例中，所称处理器801可以是中央处理单元(Central Processing Unit，CPU)，该处理器801还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field-Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立a硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器802可以包括只读存储器和随机存取存储器，并向处理器801提供指令和数据。存储器802的一部分还可以包括非易失性随机存取存储器。例如，存储器802还可以存储设备类型的信息。
具体实现中，本发明实施例中所描述的处理器801和存储器802可执行本发明实施例提供的图2或者图6所述的方法实施例所描述的实现方式，也可执行本发明实施例提供的图7所描述的GNSS启动装置的实现方法，在此不再赘述。
关于上述实施例中描述的各个装置、产品包含的各个模块/单元，其可以是软件模块/ 单元，也可以是硬件模块/单元，或者也可以部分是软件模块/单元，部分是硬件模块/单元。例如，对于应用于或集成于芯片的各个装置、产品其包含的各个模块/单元可以都采用电路等硬件的方式实现，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片内部集成处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同模块/单元可以位于芯片模组的同一件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于终端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。
本申请实施例还提供一种计算机可读存储介质，所述可读存储介质存储有计算机程序，所述计算机程序被处理器执行时，可以用于实现本申请实施例图2和图6所对应实施例中描述的GNSS启动方法，在此不再赘述。
所述计算机可读存储介质可以是前述任一实施例所述的终端设备的内部存储单元，例如设备的硬盘或内存。所述计算机可读存储介质也可以是所述终端设备的外部存储设备，例如所述设备上配备的插接式硬盘，智能存储卡(Smart Media Card，SMC)，安全数字(Secure Digital，SD)卡，闪存卡(Flash Card)等。进一步地，所述计算机可读存储介质还可以既包括所述终端设备的内部存储单元也包括外部存储设备。所述计算机可读存储介质用于存储所述计算机程序以及所述终端设备所需的其他程序和数据。所述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于可读取存储介质中，所述程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上所揭露的仅为本申请较佳实施例而已，当然不能以此来限定本申请之权利范围，因此依本申请权利要求所作的等同变化，仍属本申请所涵盖的范围。

Claims (22)

  1. 一种全球导航卫星系统GNSS启动方法，其特征在于，所述方法包括：
    接收GNSS定位请求；
    确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
    基于所述LTE帧的数量确定GNSS休眠时间；
    基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
  2. 根据权利要求1所述方法，其特征在于，LTE系统与所述GNSS时分复用，所述基于所述LTE帧的数量确定GNSS休眠时间，包括：
    基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
  3. 根据权利要求1或2所述方法，其特征在于，所述基于所述GNSS休眠时间确定GNSS的启动方式，包括：
    若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
    若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
  4. 根据权利要求3所述方法，其特征在于，若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式之后，所述方法还包括：
    根据GNSS的热启动方式启动GNSS，获取第一位置信息；
    若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
  5. 根据权利要求4所述方法，其特征在于，若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，所述方法还包括：
    更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
    获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
    基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
  6. 一种全球导航卫星系统GNSS启动装置，其特征在于，所述全球导航卫星系统GNSS启动装置包括：
    接收单元，用于接收GNSS定位请求；
    处理单元，用于确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动 结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
    所述处理单元，还用于基于所述LTE帧的数量确定GNSS休眠时间；
    所述处理单元，还用于基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
  7. 根据权利要求6所述装置，其特征在于，LTE系统与所述GNSS时分复用，所述处理单元具体用于：
    基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
  8. 根据权利要求6或7所述装置，其特征在于，所述处理单元具体用于：
    若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
    若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
  9. 根据权利要求8所述装置，其特征在于，若所述休眠时间小于或等于第一时间阈值，所述处理单元确定GNSS的启动方式为热启动方式之后，所述处理单元还用于：
    根据GNSS的热启动方式启动GNSS，获取第一位置信息；
    若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
  10. 根据权利要求9所述装置，其特征在于，若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，所述处理单元确定GNSS的启动方式为冷启动之后，所述处理单元还用于：
    更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
    获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
    基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
  11. 一种终端设备，其特征在于，包括处理器和存储器，所述处理器和所述存储器相互连接，其中，所述存储器用于存储计算机程序，所述计算机程序包括程序指令，所述处理器被配置用于调用所述程序指令，执行如权利要求1-5中任一项所述的方法。
  12. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时使所述处理器执行如权利要求1-5中任一项所述的方法。
  13. 一种芯片，其特征在于，包括存储器、处理器及存储在存储器上并可在处理器上运 行的计算机程序，其特征在于，所述处理器用于执行以下步骤：
    接收GNSS定位请求；
    确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
    基于所述LTE帧的数量确定GNSS休眠时间；
    基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启动方式。
  14. 根据权利要求13所述芯片，其特征在于，所述处理器还用于：
    基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
  15. 根据权利要求13或14所述芯片，其特征在于，所述处理器还用于：
    若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
    若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
  16. 根据权利要求15所述芯片，其特征在于，若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式之后，所述处理器还用于：
    根据GNSS的热启动方式启动GNSS，获取第一位置信息；
    若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
  17. 根据权利要求16所述芯片，其特征在于，若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，所述处理器还用于：
    更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
    获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
    基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
  18. 一种芯片模组，包括收发组件和芯片，所述芯片包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其特征在于，所述处理器用于执行以下步骤：
    接收GNSS定位请求；
    确定长期演进LTE帧数量，所述LTE帧数量为上一次GNSS冷启动结束时刻至接收所述GNSS定位请求时刻之间接收到的LTE帧的数量；
    基于所述LTE帧的数量确定GNSS休眠时间；
    基于所述GNSS休眠时间确定GNSS的启动方式，所述启动方式为冷启动方式或热启 动方式。
  19. 根据权利要求18所述芯片模组，其特征在于，所述处理器还用于：
    基于所述LTE帧的数量、LTE帧的时长以及LTE系统的寻呼周期确定GNSS休眠时间。
  20. 根据权利要求18或19所述芯片模组，其特征在于，所述处理器还用于：
    若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式；
    若所述休眠时间大于第一时间阈值，则确定GNSS的启动方式为冷启动方式。
  21. 根据权利要求20所述芯片模组，其特征在于，若所述休眠时间小于或等于第一时间阈值，则确定GNSS的启动方式为热启动方式之后，所述处理器还用于：
    根据GNSS的热启动方式启动GNSS，获取第一位置信息；
    若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动，所述第二位置信息为上一次GNSS冷启动结束时刻的位置。
  22. 根据权利要求21所述芯片模组，其特征在于，若检测到所述第一位置信息与第二位置信息之间的距离大于距离阈值，则确定GNSS的启动方式为冷启动之后，所述处理器还用于：
    更新第一数值，所述第一数值用于记录所述第一位置信息与第二位置信息之间的距离大于距离阈值的次数；
    获取第二数值，所述第二数值用于记录根据GNSS的热启动方式获取第一位置信息的总次数；
    基于所述第一数值与所述第二数值之比，更新所述第一时间阈值为第二时间阈值。
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