WO2014067354A1

WO2014067354A1 - Method and terminal for selecting satellite signals to calculate position and/or time

Info

Publication number: WO2014067354A1
Application number: PCT/CN2013/083512
Authority: WO
Inventors: 黄河; 马志锋; 魏林辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-11-02
Filing date: 2013-09-13
Publication date: 2014-05-08
Also published as: CN103792556A; CN103792556B

Abstract

A method and terminal for selecting satellite signals to calculate position and/or time. The method comprises: receiving a user's operation to set the precision requirement, and setting the precision requirement according to the user's operation (101); receiving the satellite signals, and using the satellite signals from satellites satisfying the precision requirement to calculate position and/or time according to the precision requirement set by the user (102). The satellite signals satisfying the precision requirement can be selectively received according to different application situation requirement; thus the position and/or time can be calculated accurately to satisfy the positioning and timing precision requirement of different application situations.

Description

Method and terminal for selecting satellite signal for position and/or time calculation

The present invention relates to a technique for terminal positioning using a satellite navigation system, and more particularly to a method and terminal for selecting a satellite signal for position and/or time calculation. Background technique

Nowadays, the application scenarios of terminal positioning by means of satellite navigation systems are increasing. Taking the Beidou satellite navigation system as an example, the positioning accuracy and timing accuracy of different navigation satellites in the system often differ. Therefore, if the terminal receives satellite signals with low precision For positioning, speed measurement or calibration, the accuracy of the satellite in this scenario may not be met, resulting in inaccurate measurement results. Summary of the invention

In view of this, the main object of embodiments of the present invention is to provide a method and terminal for selecting a satellite signal for position and/or time calculation, which can solve the problem that the measurement result is inaccurate due to satellite signals with low reception accuracy.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

Embodiments of the present invention disclose a method for selecting a satellite signal for location and/or time calculation, the method comprising:

Receiving the operation required by the user to set the accuracy, and setting the accuracy requirement according to the user operation; receiving the satellite signal, and performing the position and/or time calculation using the satellite signal from the satellite satisfying the accuracy requirement according to the accuracy requirement set by the user. .

Preferably, the receiving the satellite signal comprises:

Directly receiving satellite signals from satellites that meet the accuracy requirements; or receiving all satellite signals, and continuing to receive satellites from the satellites when the satellites to which the satellite signals belong meet the accuracy requirements Star signal.

Preferably, the setting accuracy requirement includes:

Set the accuracy requirements of the terminal global application; Set the accuracy requirements for different applications of the terminal. Preferably, the setting accuracy requirement comprises setting one or more of the following accuracy requirements: an accuracy requirement of an error radius or a diameter;

The accuracy requirements of satellite clock errors;

The accuracy requirements of the User Range Accuracy Indication (URAI).

Preferably, when the satellite signal from the satellite satisfying the accuracy requirement is not received, the method further comprises: reporting the positioning or timing failure.

Preferably, when the satellite signal from the satellite satisfying the accuracy requirement is not received, the method further includes:

The satellite signal continues to be received until a satellite signal from the satellite meeting the accuracy requirement is received and the satellite signal is used for position and/or time calculation.

The current set accuracy requirements are reduced in accordance with the established range until satellite signals from satellites that meet the reduced accuracy requirements are received, and the received satellite signals are used for position and/or time calculations.

Directly receive satellite signals from the current highest precision satellite and use the received satellite signals for position and/or time calculations.

Preferably, the method further includes:

Report the accuracy of the satellite to which the satellite signal currently used for positioning is located, lower than the user setting The accuracy requirements.

Preferably, the method further includes:

Reports the accuracy information of the satellite to which the satellite signal used is currently being calculated for position and/or time calculation.

The embodiment of the invention further discloses a terminal for selecting a satellite signal for position and/or time calculation, the terminal comprising a setting module, a receiving module and a calculating module;

The setting module is configured to receive an operation required by a user to set an accuracy requirement, and set an accuracy requirement according to a user operation;

The receiving module is configured to receive a satellite signal;

The calculation module is configured to perform position and/or time calculation using a satellite signal from a satellite satisfying the accuracy requirement according to an accuracy requirement set by the setting module.

Preferably, the terminal further includes:

The determining module is configured to determine, when the receiving module receives the satellite signal, whether the satellite to which the satellite signal belongs meets the accuracy requirement;

The receiving module is further configured to directly receive the satellite signal from the satellite satisfying the accuracy requirement; or receive all the satellite signals, and continue to receive the satellite from the satellite when the determining module determines that the satellite to which the satellite signal belongs meets the accuracy requirement signal.

Preferably, the setting module is further configured to set an accuracy requirement of the global application according to a user operation; and set an accuracy requirement for different applications according to a user operation.

Preferably, the setting module is further configured to set one or more of an accuracy requirement of an error radius or a diameter, an accuracy requirement of a satellite clock error, and an accuracy requirement of the URAI.

Preferably, the terminal further includes:

The display module is configured to display positioning or timing failure information when the receiving module does not receive a satellite signal from the satellite satisfying the accuracy requirement.

Preferably, the receiving module is further configured to receive no satellite signal, and the satellite When the signal comes from a satellite that meets the accuracy requirements of the satellite, it continues to receive satellite signals until it receives satellite signals from satellites that meet the accuracy requirements.

Preferably, the setting module is further configured to: when the receiving module does not receive the satellite signal, and the satellite signal is from a satellite satisfying the satellite accuracy requirement, reduce the accuracy requirement according to the predetermined amplitude, until the receiving module receives the current accuracy. Request satellite signals from satellites;

The receiving module is further configured to receive a satellite signal from a satellite that satisfies the current accuracy requirement when the setting module reduces the accuracy requirement according to the predetermined amplitude.

Preferably, the receiving module is further configured to directly receive the satellite signal from the current highest precision satellite when the satellite signal from the satellite satisfying the satellite accuracy requirement is not received.

Preferably, the display module is further configured to display the satellite accuracy of the satellite to which the satellite signal currently used for positioning is located, which is lower than the accuracy requirement set by the user.

Preferably, the display module is further configured to display accuracy information of a satellite to which the satellite signal belongs.

In the technical solution of the embodiment of the present invention, the operation for setting the accuracy requirement of the user is received, and the accuracy requirement is set according to the user operation; receiving the satellite signal, and using the satellite from the satellite satisfying the accuracy requirement according to the accuracy requirement set by the user The signal is calculated for position and/or time. In this way, the requirements for satellite accuracy in a specific scenario can be met, and the accuracy of positioning, speed measurement, and the like is improved. DRAWINGS

1 is a schematic flow chart showing an implementation process of selecting a satellite signal for position and/or time calculation according to an embodiment of the present invention;

2 is a schematic structural diagram of a terminal for selecting a satellite signal for position and/or time calculation according to an embodiment of the present invention;

3a-3c are schematic diagrams showing a display accuracy requirement setting interface according to an embodiment of the present invention;

3d-3e are schematic diagrams showing satellite accuracy information according to an embodiment of the present invention;

4a-4b are schematic diagrams showing a display accuracy requirement setting interface according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The embodiment of the present invention describes a method for selecting a satellite signal for position and/or time calculation. FIG. 1 is a schematic flowchart of an implementation process for selecting a satellite signal for position and/or time calculation according to an embodiment of the present invention, as shown in FIG. The methods include:

Step 101: Receive an operation for setting the accuracy requirement of the user, and set the accuracy requirement according to the user operation.

Here, since the method described in the embodiment of the present invention is applied to the terminal, the accuracy requirement of the global application of the terminal can be set, and the accuracy requirement for different applications of the terminal can also be set.

Here, the setting accuracy requirement includes one or more of setting an accuracy requirement of an error radius or a diameter, an accuracy requirement of a satellite clock error, and an accuracy requirement of the URAI.

Step 102: Receive satellite signals, and perform position and/or time calculations using satellite signals from satellites satisfying the accuracy requirements according to user-set accuracy requirements.

As a preferred embodiment of the receiving satellite signal, the terminal directly receives the satellite signal from the satellite satisfying the accuracy requirement; or the terminal receives all the satellite signals, and continues to receive the satellite from the satellite when the satellite to which the satellite signal belongs meets the accuracy requirement signal.

As a preferred embodiment for receiving a satellite signal from a satellite satisfying the accuracy requirement, the satellite accuracy information is obtained from the received satellite signal; or the satellite accuracy information is obtained from the positioning assistance information obtained in the mobile communication network; When the accuracy of the satellite satisfies the accuracy requirement, the satellite signal of the satellite is received.

As a preferred embodiment, the terminal reports positioning or timing failure on the display interface when the satellite signal from the satellite meeting the accuracy requirement is not received.

As a preferred embodiment, when the satellite signal from the satellite satisfying the accuracy requirement is not received, the satellite signal continues to be received until the satellite signal from the satellite satisfying the accuracy requirement is received, and the satellite signal is used for position and/or Time calculation. As a preferred embodiment, when the satellite signal from the satellite satisfying the accuracy requirement is not received, the accuracy requirement is also reduced according to the predetermined amplitude until the satellite signal from the satellite satisfying the current accuracy requirement is received, and the satellite signal is used for the position. And / or time calculation.

As a preferred embodiment, when satellite signals from satellites meeting the accuracy requirements are not received, the satellite signals from the current highest precision satellite are directly received, and the received satellite signals are used for position and/or time calculation.

As a preferred embodiment, when the satellite signal from the satellite satisfying the accuracy requirement is not received, the accuracy of the satellite to which the satellite signal currently used for positioning is located is reported to be lower than the accuracy requirement set by the user.

As a preferred embodiment, the accuracy information of the satellite to which the satellite signal used for the current position and/or time calculation is performed is also reported for when the satellite signal from the satellite satisfying the accuracy requirement is not received.

The embodiment of the invention further describes a terminal for selecting a satellite signal for location and/or time calculation, the terminal being used for:

The terminal is further configured to directly receive a satellite signal from a satellite satisfying the accuracy requirement; or receive all satellite signals, and continue to receive satellite signals from the satellite when the satellite to which the satellite signal belongs meets the accuracy requirement.

The terminal is further configured to set a precision requirement of the global application; and set an accuracy requirement for different applications.

The accuracy requirement includes one or more of the following accuracy requirements:

Accuracy requirements for error radius or diameter;

The accuracy requirements of satellite clock errors; URAI accuracy requirements.

The terminal is further configured to report a positioning or timing failure on the display interface when the satellite signal from the satellite satisfying the accuracy requirement is not received.

The terminal is further configured to continue to receive satellite signals when satellite signals from satellites satisfying accuracy requirements are not received, until satellite signals from satellites satisfying accuracy requirements are received, and the satellite signals are used for position and/or Time calculation.

Wherein, the terminal is further configured to reduce the current set accuracy requirement according to the predetermined amplitude when the satellite signal from the satellite satisfying the accuracy requirement is not received, until receiving the satellite signal from the satellite satisfying the reduced accuracy requirement, and using The received satellite signals are calculated for position and/or time.

The terminal is further configured to directly receive a satellite signal from the current highest precision satellite when the satellite signal from the satellite satisfying the accuracy requirement is not received, and perform position and/or time calculation using the received satellite signal.

The terminal is further configured to report, on the display interface, the accuracy of the satellite to which the satellite signal currently used for positioning is located, which is lower than the accuracy requirement set by the user.

The terminal is further configured to report accuracy information of a satellite to which the satellite signal used by the current position and/or time calculation is performed.

The embodiment of the present invention further describes a terminal for selecting a receiving satellite signal for position and/or time calculation. FIG. 2 is a schematic structural diagram of a terminal for selecting a receiving satellite signal for position and/or time calculation according to an embodiment of the present invention, as shown in FIG. As shown, the terminal includes:

a setting module 21, a receiving module 22 and a calculating module 23; wherein

The setting module 21 is configured to receive an operation for setting a satellite accuracy requirement by a user, and set an accuracy requirement according to a user operation;

The receiving module 22 is configured to receive a satellite signal;

The calculating module 23 is configured to use according to the accuracy requirement set by the setting module 21, The satellite signals of the satellites satisfying the accuracy requirements are subjected to position and/or time calculations. The setting module 21 is further configured to set a precision requirement of the global application according to a user operation; and set an accuracy requirement for different applications according to a user operation.

The terminal further includes: a determining module 24 configured to: when the receiving module 22 receives the satellite signal, determine whether the satellite to which the satellite signal belongs meets an accuracy requirement;

The receiving module 22 is further configured to directly receive the satellite signal from the satellite satisfying the accuracy requirement; or receive all the satellite signals, and continue to receive the satellite from the satellite when the determining module 24 determines that the satellite to which the satellite signal belongs meets the accuracy requirement. Satellite signal.

The setting module 21 is further configured to set one or more of an accuracy requirement including an error radius or a diameter, an accuracy requirement of a satellite clock error, and an accuracy requirement of the URAI.

The terminal further includes: a display module 25 configured to display the positioning or timing failure information when the receiving module 22 does not receive the satellite signal from the satellite satisfying the user-set accuracy requirement.

The receiving module 22 is further configured to continue to receive the satellite signal when the satellite signal is not received, and the satellite signal is from a satellite that satisfies the satellite accuracy requirement set by the setting module 21, until the receiving accuracy meets the accuracy requirement. Satellite satellite signal.

The setting module 21 is further configured to reduce the accuracy requirement according to the predetermined amplitude when the receiving module 22 does not receive the satellite signal from the satellite satisfying the accuracy requirement, until the receiving module 22 receives the accuracy requirement that meets the current setting. Satellite signal of the satellite;

The receiving module 22 is configured to receive a satellite signal from a satellite that satisfies the current accuracy requirement when the setting module 21 lowers the currently set accuracy requirement according to the predetermined amplitude.

The receiving module 22 is further configured to directly receive the satellite signal from the current highest precision satellite when the satellite signal from the satellite satisfying the satellite accuracy requirement is not received.

The display module 25 is further configured to display the satellite accuracy of the satellite to which the satellite signal currently used for positioning is located, which is lower than the accuracy requirement set by the user. The display module 25 is further configured to display accuracy information of a satellite to which the satellite signal belongs.

In an actual application, the setting module 21, the calculating module 23, and the determining module 24 may be implemented by a central processing unit (CPU), a digital signal processor (DSP, digital signal processor), or a field in the terminal. Field Programmable Gate Array (FPGA) implementation;

The receiving module 22 can be implemented by a receiver in the terminal;

The display module 25 can be implemented by a display in the terminal.

The method described in the embodiment of the present invention is further described in detail by taking the display operation performed when the terminal selects the satellite signal for position and/or time calculation as an example. As shown in FIG. 3a, the user sets the error radius on the terminal display interface. Accuracy requirements, and the error radius is 10 meters.

The terminal allows the positioning accuracy to be automatically reduced when the satellite cannot meet the positioning accuracy requirement; wherein, in the terminal setting whether to allow the automatic reduction of the positioning accuracy requirement, the configuration interface that allows the automatic reduction of the accuracy requirement as shown in FIG. 3b, or the figure 3c shows the configuration interface with the positioning accuracy priority or the positioning speed priority:

If it is set to: in the terminal display interface shown in Figure 3b, or in the terminal display interface shown in Figure 3c: The positioning speed is prioritized, it means that the terminal is allowed to automatically reduce the positioning accuracy requirement. Expand the satellite signal selection range, select the satellite signal of the highest-precision satellite currently available for positioning, and display the accuracy information of the satellite on the display interface, and the accuracy information may be that the satellite used for the current positioning does not reach the user setting. Positioning accuracy requirements, or the positioning accuracy value of the satellite used for the current positioning; the accuracy value of the current positioning using the satellite depends on the accuracy of the satellite with the lowest accuracy of the current satellite or the average accuracy of the currently used satellite; if shown in Figure 3b The terminal display interface is set to: No, or set in the terminal display interface shown in Figure 3c: If the positioning accuracy is prioritized, it means that the terminal is not allowed to automatically reduce the positioning accuracy requirement. At this time, the terminal will use the satellite signal that satisfies the accuracy requirement satellite. Positioning, if not received Satellite signals that meet the accuracy requirements of the satellite will continue to receive satellite signals until they receive satellite signals that meet the accuracy requirements and locate them.

The terminal allows the positioning accuracy requirements to be set separately for different applications. When the terminal locates, it checks the positioning accuracy requirements of the current application, and selects the satellite signal according to the positioning accuracy requirements of each application. When multiple applications are running at the same time, the terminal allows the selection of the highest positioning accuracy requirement, minimum accuracy requirement or average of the positioning accuracy requirements set by the user for the application as the current accuracy requirement to select the satellite signal.

3d and 3e are schematic diagrams showing the accuracy information of the terminal for using the satellite for the current positioning; when the satellite used for the current positioning does not meet the set positioning accuracy requirement, the terminal display interface is as shown in FIG. 3d, and the satellite navigation icon is displayed as Gray, the gray is represented by a checkered striped background; when the satellite currently used for positioning meets the set positioning accuracy requirement, the terminal display interface is as shown in FIG. 3e, the satellite navigation icon is displayed in blue, and the blue is oblique The line background is indicated. In this embodiment, the terminal allows different precision icons to be displayed with different icons and characters.

The method described in the embodiment of the present invention is further described in detail by taking the display operation performed when the terminal selects the satellite signal for position and/or time calculation as an example. When the user sets the timing precision of the clock error, the terminal display interface is as shown in FIG. 4a. As shown, the user sets the clock error on the terminal to 100 nanoseconds.

When performing time calibration and other services, the terminal selects the satellite signal of the satellite that satisfies the timing accuracy requirement by using the timing accuracy requirement set by the user, and uses the satellite signal to perform time calculation.

The terminal allows automatic reduction of timing accuracy requirements when the satellite cannot meet the timing accuracy requirements.

The user's terminal display interface shown in Figure 4b is set to: Yes, indicating that the terminal is allowed to automatically reduce the timing accuracy requirement when the current satellite accuracy does not meet the set timing accuracy requirement, and the terminal does not receive the satellite that satisfies the timing accuracy requirement satellite. When the signal is used, the satellite signal selection range will be expanded, and the satellite signal of the current highest timing precision satellite will be used for time calculation, and the terminal is on the display interface. The accuracy information of the satellite to which the satellite signal used is calculated by the current time is displayed, and the precision information may be a specific accuracy value of the satellite, or may indicate that the satellite does not meet the timing accuracy requirement;

If the user sets the terminal display interface shown in Figure 4b as: No, indicating that the terminal is not allowed to automatically reduce the accuracy, the terminal will continue to receive the satellite signal when it does not receive the satellite signal satisfying the accuracy requirement satellite, and the receiver meets the accuracy requirement. When the satellite signal of the satellite is started, the time calculation is started. Correspondingly, the accuracy information of the satellite is displayed on the terminal interface, and the precision information may be a specific accuracy value of the satellite, or may be: the satellite meets the accuracy requirement.

Among them, the terminal allows to set timing precision requirements for different services, and select satellite signals according to the accuracy requirements of each application. When multiple applications are running at the same time, the terminal allows the selection of the highest accuracy required in the application, the minimum accuracy requirement or the average accuracy required by the application, as the current accuracy requirement to select satellite information.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

claims

1. A method of selecting satellite signals for position and/or time calculation. The method includes: receiving an operation of setting accuracy requirements by the user, and setting the accuracy requirements according to the user's operation; receiving satellite signals, and setting the accuracy requirements according to the user's operation. Accuracy requirements, position and/or time calculations are performed using satellite signals from satellites that meet said accuracy requirements.

2. The method according to claim 1, wherein the receiving satellite signals includes: directly receiving satellite signals from satellites that meet accuracy requirements; or receiving all satellite signals, and when the satellites to which the satellite signals belong meet accuracy requirements. , continue to receive satellite signals from said satellite.

3. The method according to claim 1, wherein the setting accuracy requirements includes: setting accuracy requirements for global applications; and setting accuracy requirements for different applications.

4. The method according to claim 1, wherein said setting accuracy requirements includes setting one or more of the following accuracy requirements:

Accuracy requirements for error radius or diameter;

Accuracy requirements for satellite clock errors;

User ranging accuracy index URAI’s accuracy requirements.

5. The method according to claim 1, 2, 3 or 4, wherein when no satellite signal is received from a satellite that meets accuracy requirements, the method further includes:

Report positioning or timing failure on the display interface.

6. The method according to claim 1, 2, 3 or 4, wherein when no satellite signal is received from a satellite that meets accuracy requirements, the method further includes:

Continue to receive satellite signals until a satellite signal is received from a satellite that meets the accuracy requirements, and use the satellite signal to perform position and/or time calculations.

7. The method according to claim 1, wherein when no satellite signal from a satellite that meets accuracy requirements is received, the method further includes: Reduce the currently set accuracy requirement by a given amount until a satellite signal is received from a satellite that meets the reduced accuracy requirement, and use the received satellite signal for position and/or time calculations.

8. The method according to claim 1, wherein when no satellite signal from a satellite that meets accuracy requirements is received, the method further includes:

Receive satellite signals directly from the highest accuracy satellites available and use the received satellite signals for position and/or time calculations.

9. The method according to claim 7 or 8, wherein the method further includes: reporting the accuracy of the satellite to which the satellite signal currently used for positioning is lower than the accuracy requirement set by the user.

10. The method according to claim 7 or 8, wherein the method further includes: reporting the accuracy information of the satellite to which the satellite signal currently used for position and/or time calculation belongs.

11. A terminal that selects satellite signals for position and/or time calculation, the terminal includes a setting module, a receiving module and a calculation module; wherein,

The setting module is configured to receive the user's operation of setting accuracy requirements, and set the accuracy requirements according to the user's operation;

The receiving module is configured to receive satellite signals;

The calculation module is configured to perform position and/or time calculations based on the accuracy requirements set by the setting module, using satellite signals from satellites that meet the accuracy requirements.

12. The terminal according to claim 11, wherein the terminal further includes:

The judgment module is configured to judge whether the satellite to which the satellite signal belongs meets the accuracy requirements when the receiving module receives the satellite signal;

The receiving module is also configured to directly receive satellite signals from satellites that meet accuracy requirements; or to receive all satellite signals, and determine in the judgment module that a satellite signal belongs to a satellite that meets accuracy requirements. When required, continue to receive satellite signals from said satellite.

13. The terminal according to claim 11, wherein,

The setting module is also configured to set accuracy requirements for global applications based on user operations; and set accuracy requirements for different applications based on user operations.

14. The terminal according to claim 11, wherein,

The setting module is also configured to set one or more of the accuracy requirements of the error radius or diameter, the accuracy requirements of the satellite clock error, and the accuracy requirements of the user ranging accuracy index URAI.

15. The terminal according to claim 11, 12, 13 or 14, wherein the terminal further includes:

The display module is configured to display positioning or timing failure information when the receiving module does not receive satellite signals from satellites that meet accuracy requirements.

16. The terminal according to claim 11, 12, 13 or 14, wherein,

The receiving module is also configured to continue to receive satellite signals when a satellite signal is not received and the satellite signal comes from a satellite that meets the satellite accuracy requirements until a satellite signal from a satellite that meets the accuracy requirements is received.

17. The terminal according to claim 11, wherein,

The setting module is also configured to, when the receiving module does not receive a satellite signal and the satellite signal comes from a satellite that meets the satellite accuracy requirements, reduce the accuracy requirement according to a predetermined range until the receiving module receives the satellite signal that meets the current accuracy requirements. satellite signal;

The receiving module is also configured to receive satellite signals from satellites that meet the current accuracy requirements when the setting module reduces the accuracy requirements according to a predetermined range.

18. The terminal according to claim 11, wherein,

The receiving module is also configured to directly receive satellite signals from satellites with the highest current accuracy when no satellite signals are received from satellites that meet satellite accuracy requirements.

19. The terminal according to claim 17 or 18, wherein, The display module is also configured to display the satellite accuracy of the satellite to which the satellite signal currently used for positioning is lower than the accuracy requirement set by the user.

20. The terminal according to claim 17 or 18, wherein,

The display module is also configured to display accuracy information of the satellite to which the satellite signal belongs.