Method, device and communication system for establishing local exchange

Abstract

A method for establishing a local exchange includes: instructing a target base station to establish the local exchange during switching; receiving a notice transmitted from the target based station after the target base station establishes the local exchange successfully during the switching, wherein the notice indicates that the local exchange has been established; and transmitting to a Mobile Switching Center a message indicating that the local exchange has been established in the target base station. A device and a system for establishing the local exchange are also disclosed correspondingly. The technical solutions in the present invention can not only reduce the time and the interface resources required for the local exchange effectively but also enable both parties of communication who establish the local exchange to enjoy a variety of supplementary services smoothly.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, relates to a method, device and communication system for establishing a local exchange. Background technique [0002] With the rapid development of mobile communication technology and the widespread use of mobile communication services, the construction speed of wireless mobile communication networks in many regions of the world far exceeds the construction speed of wired networks, but at the same time, it also causes transmission in mobile communication networks. Resources are relatively tight. [0003] For example, in the Global System for Mobile Communications (GSM) network, due to the large number of base stations (Base TransceiverStation, BTS), the transmission link connecting the BTS and the Abis interface of the base station controller (Base Station Controller, BSC) and connecting the BSC and mobile The construction scale of the transmission lin...

AI Technical Summary

Problems solved by technology

[0005] However, at present, for the situation that the two calls will be located in the same BTS after handover, the base station controller will send the call to the BTS when the two calls that constitute the session are located in the same BTS after the handover process is completed. At this time, the BTS can establish the local exchange between the two parties in the call. In this way, the establishment of the local exchange will take a long time and occupy more interface resources.

In addition, since the establishment of the local switching between the two parties in the call is performed between the BSC and the BTS controlled by it, the MSC does not know whether the two parties in the call have performed local switching, so the transmission resources of the A interface cannot be released.

At the same time, when the two parties or one party in the call have supplementary services, such as: call waiting, call hold, multi-party call, legal interception, etc., because the MSC does not know that the two parties have established a local exchange, the call cannot go smoothly. Switch back to the core network, which will cause the two parties in the call to be unable to enjoy these supplementary services during the call

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