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GPS-GPSOne double-mode switching and double-mode switching terminal

A mobile terminal and mode technology, which is applied in the direction of measuring devices, instruments, radio wave measurement systems, etc., can solve the problems that the sensor measurement information cannot be comprehensively utilized in the radio navigation system, such as positioning, accuracy and use range limitations, to overcome the radio navigation system Occasional failure of positioning, ensuring the continuity of the whole process, and the effect of quick switching

Inactive Publication Date: 2009-04-15
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that any single navigation system in the prior art has certain limitations in its accuracy and range of use, the measurement information of various sensors cannot be comprehensively utilized, overcome the shortcomings of radio navigation system positioning failures, and overcome inertia The shortcomings of navigation and dead reckoning system positioning errors accumulated over time, the maximum extraction of useful information, and technical issues such as ensuring the continuity of vehicle positioning throughout the entire process, the present invention provides a GPS-GPSOne dual-mode switching method
[0010] In order to solve the problem that any single navigation system in the prior art has certain limitations in its accuracy and range of use, the measurement information of various sensors cannot be comprehensively utilized, overcome the shortcomings of radio navigation system positioning failures, and overcome inertia The shortcomings of navigation and dead reckoning system positioning errors accumulated over time, the maximum extraction of useful information, and technical issues such as ensuring the continuity of vehicle positioning throughout the entire process, the invention also provides a GPS-GPSOne dual-mode switching terminal

Method used

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  • GPS-GPSOne double-mode switching and double-mode switching terminal
  • GPS-GPSOne double-mode switching and double-mode switching terminal
  • GPS-GPSOne double-mode switching and double-mode switching terminal

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Embodiment Construction

[0030] The present invention is described below in conjunction with accompanying drawing:

[0031] In a specific embodiment of the present invention, the mobile terminal is a vehicle.

[0032] see figure 1 The GPS-GPSOne dual-mode switching method of the present invention and the flowchart of the GPS-GPSOne dual-mode switching method in the terminal; figure 1As shown, the GPS-GPSOne dual-mode switching method includes the steps: the first step, carrying out the switching judgment of the state between GPS-GPSOne dual-modes by the inertia criterion and the efficiency criterion; The selection of GPS or GPSOne positioning mode; the 3rd step, compare described GPS satellite constellation and the sorting mode of described GPSOne base station, select positioning mode; The 4th step, carry out described GPS mode and described GPSOne mode between switch.

[0033] In the technical solution of the present invention, in the first step, the inertia criterion is judged by the function Z(d...

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Abstract

The invention relates to a GPS-GPSOne dual mode switching method applied at the time of mobile terminal positioning and a terminal thereof. The GPS-GPSOne dual mode switching method comprises the following steps: the first step: performing switching judgment on the state between the GPS-GPSOne dual mode by an inertia rule and an efficiency rule; the second step: selecting the GPS or GPSOne positioning mode by a speed threshold and a signal threshold; the third step: comparing the ordering mode of a GPS satellite constellation with that of a GPSOne base station, and selecting the positioning mode; and the fourth step: switching between the GPS mode and the GPSOne mode. A GPS-GPSOne dual mode switching terminal comprises a main control unit, a GPS receiving unit and a GPSOne receiving unit. The method and the terminal can effectively ensure the flexibility of and the rapid switching between the GPS positioning mode and the GPSOne positioning mode, and ensure the whole course continuity and the stability of vehicle positioning.

Description

technical field [0001] The invention relates to mobile terminal positioning technology, in particular to a GPS-GPSOne dual-mode switching method used in mobile terminal positioning and a CDMA 1X-based dual-mode switching terminal. Background technique [0002] The Global Positioning System (GPS) was developed by the United States in the 1970s. It took 20 years and was completed in 1994 at a cost of 20 billion US dollars. GPS has won the recognition of users all over the world with its outstanding features such as all-weather, high precision, automation, and high efficiency. It is a positioning technology with the most mature application and the widest coverage of positioning services in the world. [0003] GPSOne is a positioning technology developed by Qualcomm on the basis of GPS for location-based services, and adopts the Client / Server method. It organically combines two positioning technologies, wireless assisted AGPS and advanced forward link AFLT triangulation, to ach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S1/02H04W88/06
Inventor 梁永生湛邵斌张基宏项帅求
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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