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Method for switching double module mobile terminal from GSM to TD-SCDMA

A TD-SCDMA and mobile terminal technology, which is applied in the field of switching from GSM to TD-SCDMA for dual-mode mobile terminals, and can solve the problems of not having or being able to complete service switching between different systems.

Inactive Publication Date: 2010-12-22
ST ERICSSON SEMICON BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this type of dual-mode terminal fundamentally does not have the ability to detect the signal quality of another system cell at the same time when one system is performing services, it cannot complete service switching between different systems.

Method used

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  • Method for switching double module mobile terminal from GSM to TD-SCDMA
  • Method for switching double module mobile terminal from GSM to TD-SCDMA
  • Method for switching double module mobile terminal from GSM to TD-SCDMA

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Embodiment Construction

[0025] The invention provides a method for switching a dual-mode mobile terminal from GSM to TD-SCDMA. The method enables the dual-mode mobile terminal to realize automatic switching from the GSM system to the TD-SCDMA system, that is, hard switching, without interrupting communication services during the switching process. Therefore, the problem that the communication service on the current mobile terminal (even a dual-mode dual-standby mobile terminal) cannot work continuously when switching from the GSM system to the TD-SCDMA system is solved. Such as figure 1 Shown is a schematic diagram of a method for switching a dual-mode mobile terminal from GSM to TD-SCDMA according to a specific embodiment of the present invention.

[0026] In order to achieve the above object, according to the principle of specific embodiments of the present invention, firstly, the mobile terminal performs timing synchronization by receiving TD-SCDMA system data in the idle time slot of GSM, and the...

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Abstract

The invention relates to a switching method of a double-die moving terminal from GSM to TD-SCDMA, and the method comprises the following steps: step S1, a moving terminal aims at a TD-SCDMA system to do timing synchronization, step S2, the moving terminal does system frame number synchronization and the up-going synchronization, step S3, the moving terminal does an activated service on the TD-SCDMA district. The invention has the advantages that the method enables the moving terminal to check another signal quality of an adjacent district of a system when a system is doing service, and in theprocess of switching, system frame number synchronization and up-going synchronization are executed at the same time, and the double-die moving terminal is enabled to finish switching among systems in regulated time.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for switching a dual-mode mobile terminal from GSM to TD-SCDMA. Background technique [0002] At present, the GSM network, which is the representative of the second-generation mobile communication technology, is quite mature. At the same time, as one of the mainstream technologies of the third-generation mobile communication, the TD-SCDMA network will gradually be widely used. In this way, for quite a long period of time, GSM network and TD-SCDMA network will exist in parallel. If the mobile terminal can realize automatic switching between two modes, it will play a key role in improving the service quality of the mobile system. [0003] According to the requirements of the agreement, the automatic dual-mode mobile terminal should have the ability to measure the signal quality of different system cells, and the ability to complete the inter-system handover according t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14
Inventor 杨明洪
Owner ST ERICSSON SEMICON BEIJING