Different system quick return method and terminal

Abstract

The invention provides a differentiation system quick return method and a terminal. The method comprises the steps that before a first system switches to a second system, the terminal receives a first indication message sent by the first system; the first indication message comprises the threshold of the first system, which is quickly returned by the terminal; after the first system switches to the second system, the terminal receives a second indication message sent by the second system; the second indication message comprises first frequency point information of the first system, which is corresponding to an identifier LAI of the current location area of the terminal; whether the network quality of a first cell corresponding to the first frequency point information of the first system meets the threshold of the first system, which is quickly returned by the terminal is detected; and if meeting is realize, access the first cell is carried out. According to the invention, ping-pong effect and signaling consumption, which are caused due to the fact that the network quality of the cell is poor when the terminal carries out quick returning, are avoided; the terminal can stably and reliably return the system which preferentially resides from a differentiation system; and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and a terminal for quick return from different systems. Background technique [0002] With the continuous development of wireless communication technology, from the second generation mobile communication technology (2G for short) to the third generation mobile communication technology (3G for short) to the fourth generation mobile communication technology (Forth Generation , 4G), higher and higher requirements are put forward for terminals, and multi-mode terminals have become a trend, which can support multiple network technologies. Especially in the 4G era, 4G terminals must be compatible not only with 3G but also with 2G. Under the 4G network, users can achieve a download rate of 100 Mbps (Megabit per second, referred to as Mbps). This high rate can provide users with a better user experience than 3G / 2G. , 4G cannot carry Voice over Internet P...

AI Technical Summary

Problems solved by technology

[0004] In the above fast return method, if the network quality of the 4G cell is not good when the terminal is performing fast return, for example, it just meets the reselection, redirection or handover threshold from 4G to 3G / 2G, then the terminal will keep on 3G Switching between 2G and 4G networks will cause a ping-pong effect, which will not only cause a lot of unnecessary signaling consumption, but also lead to unstable user services and affect user experience

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