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

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...

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

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