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Power on and network search method for dual-card and dual-standby mobile phone

A dual-SIM dual-standby, mobile phone technology, used in access restrictions, electrical components, radio/induction link selection arrangements, etc.

Active Publication Date: 2008-05-28
WINGTECH COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Solution 2 supports dual card dual standby, but uses two independent systems. Therefore, in a single system, it is a standard GSM process to start and log in to the network

Method used

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  • Power on and network search method for dual-card and dual-standby mobile phone
  • Power on and network search method for dual-card and dual-standby mobile phone
  • Power on and network search method for dual-card and dual-standby mobile phone

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Embodiment Construction

[0062] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention should not be limited thereby. The present invention requires synchronous cooperation of hardware design and software design, and the present invention will be described below from the perspectives of hardware and software.

[0063] The hardware implementation platform of the present invention is shown in Figures 1-1 and 1-2. The hardware uses a set of GSM communication circuits, an antenna, a single memory, two sets of SIM card interface circuits, and a set of other control circuits. The hardware is based on the general GSM hardware architecture, and an analog switch is added to switch between two SIM cards through software control.

[0064] The GSM communication circuit includes a radio frequency circuit and a baseband processor, and the radio frequency circuit...

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Abstract

The invention discloses a method of searching for the network after switching on a mobile phone capable to have two SIM cards on line and usable for both GSM and CDMA network systems. 1 the mobile is switched on; 2 the information on two SIM cards is read; 3 seven steps are included as follows: 3.1 SIM1 searches and monitors a BCCH signal path, 3.2 LAI of the prior channel is acquired, 3.3 if the acquired LAI of the channel is at variance with that on the SIM card, the band of position is caused to update, 3.4 if the acquired LAI in the channel consists with that on the SIM card, MSC attachment is carried through, 3.5 the new LAI and the BCCH frequencies are listed, the acquired TMSI is written into the SIM card, 3.6 the mobile phone is in the stand-by condition, 3.7 the prior network information is displayed; 4 a SIM card2 completes the network choice and the channel choice independently according to the flow of 3. When the two cards belong to the same carrier, the second SIM card shares the network parameter in the SIM1, and processes the same flow of searching for the network. The invention solves the problem of two SIM cards signing in the network after switching on the mobile phone.

Description

technical field [0001] The invention relates to a method for finding a network when starting up a Global System for Mobile Communications (Global System for Mobile Communications, hereinafter referred to as GSM) mobile phone, in particular to a method for finding a network when starting up a dual-card dual-standby mobile phone. Background technique [0002] With the rapid development of personal mobile communications, many users have more than two numbers corresponding to more than two Subscriber Identity Model (SIM) cards. In this case, you can choose to use two mobile phones, but it is very troublesome, so more and more users choose to use GSM mobile phones that support dual SIM cards. [0003] Currently, there are two technologies that support dual SIM: [0004] 1: Single GSM communication module, connect two SIM cards electronically or mechanically, but only one can work at the same time. The other one is turned off. That is, only one number can be used. [0005] 2: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/32H04Q7/38H04W48/16H04W88/06
Inventor 蔡林川徐强高岩
Owner WINGTECH COMM
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