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Network selection method of TD-SCDMA and GSM dual-mode mobile phone

A TD-SCDMA, dual-mode mobile phone technology, applied in the field of wireless communication terminals, can solve the problems of physical interference, poor use effect of TD-SCDMA and GSM dual-mode mobile phones, etc., to improve the use effect and reduce mutual interference.

Inactive Publication Date: 2007-10-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the working frequency band of the GSM network includes 1800MHz, although TD-SCDMA and GSM dual-mode mobile phones have the above-mentioned advantages, but because the working frequency band of TD-SCDMA is very close to the frequency band of DCS1800, it will physically interfere. When the GSM module When it is in DCS1800, the TD-SCDMA and GSM dual-mode mobile phone will not work well

Method used

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  • Network selection method of TD-SCDMA and GSM dual-mode mobile phone
  • Network selection method of TD-SCDMA and GSM dual-mode mobile phone

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Embodiment Construction

[0026] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] TD-SCDMA and GSM dual-mode mobile phone includes TD-SCDMA module and GSM module at the same time.

[0028] Referring to Figure 1, the network selection method for TD-SCDMA and GSM dual-mode mobile phones specifically includes the following steps:

[0029] 1. When it is necessary to select a network, search for a 900MHz frequency band network or a 1800MHz frequency band network that meets the communication requirements.

[0030] Step S101: When starting up or switching modes, the GSM module starts up and starts searching for a GSM network that meets the requirements.

[0031] Step S102: Search for a 900MHz frequency band network.

[0032] 2. When there is a 900MHz frequency band network that meets the communication requirements, use the 900MHz frequency band network as the working network of the dual-mode mobile phone; otherwise, contin...

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Abstract

The invention discloses a network selection method for a TD-SCDMA and GSM double-mode handset, the method comprises: finding a 900MHz band network or a 1800MHz band network satisfying communication request during starting-up or mode switching; using the 900MHz band network as an operation network of the double-mode handset when there is a 900MHz band network satisfying communication request; staring a timer after selecting the 1800MHz band network as the operation network; selecting the 1800MHz band network or the 900MHz band network based on whether a GSM module has information interaction with the network; storing 1800MHz band network information when the GSM module has no information interaction with the network, stopping connection of the GSM module between the 1800MHz band network and a base station, finding the 900MHz band network; switching the GSM module to be operated under the 900MHz band network or restoring the connection with the 1800MHz band network.

Description

technical field [0001] The invention relates to a wireless communication terminal technology, in particular to a network selection method for a TD-SCDMA and GSM dual-mode mobile phone. Background technique [0002] With the gradual commercialization of TD-SCDMA (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access), the TD-SCDMA network has to face the problem of insufficient network coverage in the initial stage of construction. If this practical problem cannot be solved, it will Greatly affect the development of TD-SCDMA users, and then affect the development of TD-SCDMA in China and the world. To solve this problem, the best solution at present is nothing more than using other networks to supplement the TD-SCDMA network. The GSM network just meets the above conditions, and the corresponding TD-SCDMA and GSM dual-mode dual-standby mobile phones are required on the terminal. To meet the needs of TD-SCDMA and GSM networks. [0003] The working frequency band o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04Q7/32H04W48/18H04W88/06
Inventor 杨起丁克忠马爱芬
Owner ZTE CORP