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Switching device and method for mobile communication terminal

A technology of mobile communication terminal and conversion device, which is applied in the direction of selection device, wireless communication, and multi-terminal-to-network, etc., can solve the problems of reduced position accuracy, difficulty in calculating virtual range data, and reduced accuracy of position calculation, so as to prevent thermalization. , Improve the effect that the position accuracy is not high and improve the position accuracy

Inactive Publication Date: 2007-03-07
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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AI Technical Summary

Problems solved by technology

When the three-mode terminal uses the gpsOne function, it prevents the thermalization of the temperature compensation crystal oscillator caused by the heat of the power amplifier, and the accuracy of the terminal's position calculation decreases.
[0008] Therefore, the stable frequency characteristics of the above-mentioned temperature compensated crystal oscillator can be said to be necessary to ensure the GPS performance. If the frequency characteristics of the TCXO are lowered due to thermalization, it will become difficult to calculate the correct virtual range data, resulting in terminal failure. The GPS performance deteriorates and the accuracy of the position decreases, and finally the user cannot quickly get the E911 service in a critical state

Method used

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  • Switching device and method for mobile communication terminal
  • Switching device and method for mobile communication terminal
  • Switching device and method for mobile communication terminal

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Embodiment Construction

[0021] The invention provides a switching device and method for a mobile communication terminal. The following describes in detail with reference to the accompanying drawings of preferred embodiments of the present invention.

[0022] 1 is a structural block diagram of a mobile communication terminal according to the present invention. A temperature detection section 201 for measuring the temperature of a temperature-compensated crystal oscillator (TCXO) is installed on a body 101 of an existing three-mode mobile communication terminal, and is also It includes a control unit 202 that receives the temperature information detected by the temperature detection unit 201 and determines the actual temperature, and controls switching of the call mode for performing the gpsOne function according to the determined temperature.

[0023] The above temperature information is actually the actual temperature calculated from the voltage value (or resistance value) output by the temperature d...

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Abstract

The present invention discloses a switching device and method for mobile communication terminal which belongs to the mobile communication terminal parts and mobile communication technique. The device of the invention comprises: a temperature detection component for detecting the temperature of TCXO; a control component for judging the temperature of the TCXO, controlling the switch of gpsOne communication mode and other communication modes. The switching method comprises: detecting the temperature of TCXO in the mobile communication terminal when requesting the emergency service; comparing the detected TCXO temperature with the assigned reference temperature; switching the current communication mode into other communication mode and executing the gpsOne function if the TCXO temperature is higher than the reference temperature. Therefore, TCXO overheating caused by the power amplifiers heating which degrades the position calculation accuracy is prevented when the three modes utilizing the gpsOne function.

Description

technical field [0001] The invention belongs to components of mobile communication terminals and mobile communication technology, in particular to a switching device and method for mobile communication terminals. Background technique [0002] Generally, a Tri Mode terminal is a terminal that supports three frequency bands (PCS: 1850~1990MHz, GPS: 1570~1580MHz, DCN: 824MHz~894MHz). When the user uses the gpsOne function of the mobile communication terminal served by E911, The signals are respectively transmitted to the three-mode terminal of the PCS or DCN module, and the three-mode terminal works. [0003] For reference, the above-mentioned gpsOne method is a technology developed by qualcomm in the United States. It uses GPS satellite signals to track the location, and receives satellite information from the mobile communication network in advance to make it track GPS satellite signals, thus shortening the time required for location tracking. , and improve the way of receiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04W4/00
CPCH03H7/48H04B1/40H04B1/403H04W36/08
Inventor 韩政锡
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD
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