Circuit switching (CS) method and device

Abstract

The invention discloses circuit switching (CS) method and device, wherein the method comprises the following steps of: transmitting an enhanced switching request message to a target controller by a source controller through an interconnected interface among controllers so as to inform the target controller of preserving wireless channel resource in a target cell; and transmitting a command for CSto the terminal after receiving an enhanced switching request response message of the target controller. By using the invention, the preserving process of the wireless channel resource in the switching preparation process can be processed ahead, so the time for switching preparation can be shortened and the probability of call drop and other phenomena caused by overlong switching preparation timecan be reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a circuit switching CS switching method and device. Background technique [0002] Circuit Switching (CS) refers to the process of establishing connections on demand and allowing dedicated connections until they are released. A circuit-switched network consists of one physical path and supports a single connection between two endpoints in the network connection. When transmitting real-time data (such as audio and video, etc.) or when the quality of service (QOS) requirements are high, circuit switching networks are usually used. For example, a traditional voice telephone service is a process of realizing circuit switching through a public switched telephone network (Public Switch Telephone Network, PSTN). [0003] In a mobile communication system, voice is usually carried by circuit switching. The mobile communication system currently includes GSM system, UMTS system, LTE system, CDMA...

AI Technical Summary

Problems solved by technology

[0012] In the process of realizing the present invention, the inventors found that in the prior art, a long handover preparation time is required, and the handover efficiency is low

Moreover, in some scenarios, the long-term handover preparation may affect the normal transmission of data. For example, in areas with deep signal fading (corner, high speed, etc.), the 3G network signal may rapidly fade, and the handover preparation from 3G to 2G The time is relatively long, so it may cause the terminal to drop the call due to poor signal before switching to the 2G network (even before the switching preparation is completed).

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