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
CN101408612AInactive Publication Date: 2009-04-15SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
Publication Date
2009-04-15
Estimated Expiration
Not applicable · inactive patent

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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.
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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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