Dual-mode terminal switching method, system, and the dual-mode terminal

Abstract

The invention discloses a method for realizing switching of a double module terminal, which is used in a first network, a second network and a double module terminal system. The method comprises the following steps: A. The first network broadcasts position deviation parameters between the second network and an upstream pilot channel time slot to the double module terminal; B. After the double module terminal connected to the first network receives the position deviation parameters, the double module terminal counts and obtains time slot position information of the upstream pilot channel sent by the second network according to the position deviation parameters and is attached to the second network according to the time slot position information, thus realizing the switching among networks. The method of the invention guarantees that the double module terminal can be upstream connected correctly and realizes the normal switching among the double module terminal systems to cause users to have relatively good experience. The invention further discloses a system and the double module terminal that realize the switching of the double module terminal.

Description

technical field [0001] The present invention relates to data transmission technology in the communication field, and in particular to a method and system for realizing dual-mode terminal switching and a dual-mode terminal. Background technique [0002] At present, the construction of the third generation mobile communication system (3G) must rely on the existing 2 / 2.5 generation mobile communication system (2 / 2.5G) to solve the problems of network coverage and roaming, so the existing 3G terminals mostly use Dual-mode multi-frequency design of Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) and 3G. In this way, users can obtain 3G high-speed data services and voice services in the coverage area of ​​the 3G network, and use the existing 2 / 2.5G network to provide services in areas that are not yet covered by the 3G network. It is very important to realize the correct switching between adjacent different systems in the terminal. [0003] The ...

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Problems solved by technology

[0011] The present invention provides a method, a system and a dual-mode terminal for realizing dual-mode terminal switching, which are used to solve the problem in the prior art that the accurate time slot position information of UpPCH cannot be known in advance when the dual-mode terminal works in the first network system, so that Access to the second network fails, which leads to the failure of handover between terminal systems

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