A method for realizing the interaction of voice coding and decoding capabilities between wireless network and core network

Abstract

The present invention relates to a method for realizing the interaction of voice coding and decoding capabilities between a wireless network and a core network. The BSC (20) reports the codec capabilities of all cells to the MSC Server (10) through multiple extended resource indication messages. Through this method, the MSCServer (10) can know the voice codec capability of each cell of the wireless network, avoid the core network assigning a voice version that cannot be provided by the wireless network, thereby reducing the number of times of voice codecs, easily realizing no voice codec conversion operations, and improving voice quality.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a method for realizing the interaction of voice coding and decoding capabilities between a wireless network and a core network. Background technique [0002] In the existing Global System for Mobile Communications (GSM for short), the A interface between the Mobile Switching Center (MSC for short) and the Base Station Controller (BSC for short) is based on time division multiplexing Time Division Multiple, referred to as TDM bearer, transmits 64Kbps Pulse Code Modulation, referred to as PCM voice coded signal. Compressed speech coded signals are transmitted on the air interface Um interface between the mobile terminal MobileStation, referred to as MS and the base station Base Station, referred to as BTS. The interface between the BTS and the BSC is the Abis interface, which is also based on TDM bearer, and what is transmitted on this interface is the same compressed speech coded ...

AI Technical Summary

Problems solved by technology

However, this framework also brings about a problem. Since the BSC cancels the TC, the TC function of the MGW is used during the call. Therefore, there is a need for a method to enable the voice codec between the core network and the wireless network before the call is established. Negotiation of functions to avoid the core network from assigning the voice version that the wireless network cannot provide

Otherwise, when the core network assigns a voice version that cannot be provided by the wireless network, the MGW has to insert a TC for voice adaptation when processing a call, which wastes TC resources and cannot establish Trfo during the call.

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