Double module terminal and its method for selecting resident network

Abstract

A double module terminal and its resident network selecting method are disclosed in the present invention, wherein, the double module terminal resident network selecting method comprises the following steps: a terminal judges whether or not to be able to search the first mode cell and reside successfully, if does, then entering the first mode cell idle mode; otherwise, the terminal judges whether or not be able to search the second mode cell and reside successfully, if does, then entering the second mode cell idle mode, otherwise, the terminal supplies limited service only. The double module terminal and its resident network selecting method of the present invention lead the terminal more likely to reside 3G cell, and avoid redundant electric consumption, so as to improve the system performance.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a dual-mode terminal and a method for selecting a resident network. Background technique [0002] At present, the second generation mobile communication system (2G) is mainly based on the Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) standard, that is, the mobile communication system of the GSM / GPRS standard, while the third generation The mobile communication system (3G) consists of a time division synchronous code division multiple access (Time Division-Synchronous CDMA, TD-SCDMA) standard mobile communication system and a wideband code division multiple access (Wide band CDMA, WCDMA) mobile communication system. This standard is the main one, and the mobile communication system of the TD-SCDMA standard is the only 3G mobile communication system that supports Time Division Duplex (TDD) mode. Existing mobile terminals that supp...

AI Technical Summary

Problems solved by technology

[0006] 1) Existing dual-mode terminals do not have an obvious tendency to choose 2G or 3G networks, so that the 3G networks cannot be reused;

[0007] 2) In the actual application environment where 2G and 3G networks coexist, there will be various situations. For example, the 2G network does not necessarily support information notification to neighboring cells of other 3G standards, so that the terminal will frequently perform notifications on neighboring cells of 3G standards. Full frequency band search in order to switch from 2G network to 3G network, resulting in waste of power;

[0008] 3) Although the terminal detects that the signal quality of a certain standard cell meets certain requirements, it cannot normally reside in the cell of this standard due to the existence of abnormal interference, so it needs to continuously perform cell reselection, resulting in the terminal being frequently in the Stressful working state wastes its limited energy and shortens standby time

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