Method, device and system for implementing IP A interface in second generation mobile communication system

Abstract

The invention discloses a method, equipment and a system for causing an A interface to obtain the IP, which are used for realizing the IP processing to the A interface between a base-station control device and a media gateway. The method of the invention mainly includes that the base-station control device carries out the removal of the encapsulation of a rate adapter unit TRAU to received wireless side data so as to obtain the static-load data of a compressed voice code, the static-load data of a compressed voice code is then encapsulated into an IP packet; the IP packet is sent to the mediagateway by the A interface between the base-station control device and the media gateway. Therefore, the method, the equipment and the system can realize the non-code conversion of the path wholly orpartially so as to improve the voice quality and save the equipment cost. Simultaneously, the transmission by the compressed code can also reduce the transmission consumption and the transmission cost, and improve the transmission utilization.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a technology for implementing IP-based A interface in a second-generation mobile communication system. Background technique [0002] The structure of GSM (Global System for Mobile Communications) is as follows: figure 1 As shown, in the GSM system, BTS (base station) and BSC (its station controller) are collectively referred to as base station subsystem BSS. The interface between BTC and BSC is called Abis interface, and the interface between BSS and MSC (Mobile Switching Center) is called A interface. [0003] Currently, if figure 2 As shown, both the Abis interface and the A interface adopt TDM (time division multiplexing) transmission technology, and the Abis interface adopts TRAU (rate adaptation unit) protocol frame to transmit GSM voice and data messages, and each TRAU channel occupies 16K bandwidth , the voice coding format adopted is HR (half ra...

AI Technical Summary

Problems solved by technology

[0006] 1. The BSC needs to complete the conversion processing of HR, FR or EFR compression coding on the wireless side to G.711 non-compression coding, which not only reduces the voice quality, but also wastes TC (code switch) resources;

[0007] 2. The A interface adopts G.711 encoding, and each call needs to occupy a bandwidth of 64Kbps, resulting in a waste of transmission resources from the BSS (base station subsystem) to the core network

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