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 CS to 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 time can be reduced.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for circuit switching CS switching. Background technique [0002] Circuit Switching (Circuit Switching, CS) refers to a process of establishing connections as required and allowing these connections to be dedicated until they are released. The circuit-switched network contains a physical path and supports a single connection between two end points in the network connection process. When transmitting real-time data (such as audio and video, etc.) or when the quality of service (QOS) is demanding, a circuit-switched network is usually used. For example, the traditional voice telephone service is the process of circuit switching through the Public Switch Telephone Network (PSTN). [0003] In mobile communication systems, circuit switching is generally used to carry voice. Mobile communication systems currently include GSM systems, UMTS systems, LTE systems, CDMA...

AI Technical Summary

Problems solved by technology

[0013] 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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