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Code switching method, system and device

A coding and coding type technology, which is applied in the field of coding switching methods, systems and equipment, can solve problems such as the lack of a BSCCodec switching method, and achieve the effect of not being able to guarantee the quality of voice calls and avoiding inconsistent coding

Inactive Publication Date: 2012-12-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no method for the BSC to notify the core network to switch the Codec

Method used

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  • Code switching method, system and device
  • Code switching method, system and device
  • Code switching method, system and device

Examples

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0038] In the GSM system, the BSS is usually composed of a BSC and one or more BTSs, where the BSC is connected to the MSC (Mobile Switching Center, Mobile Switching Center), the BTS is connected to the MS (Mobile Station, Mobile Station) through a wireless interface, and the BTS is responsible for the wireless Transmission, BSC is responsible for control and management. The interface between BSC and MSC is called A interface, and MSC further includes MSC Server (MSC server) and MGW, wherein the connection between MSC Server and BSC is a signaling plane connection, and the connection between MGW and BSC is a user plane connection.

[0039] The schematic diagram of the network after the A interface is converted to IP is as follows: figure 1 As shown, the BSS no longer owns the TC at this time, and the coding of the air interfa...

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PUM

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Abstract

A method, system, and device for handing over codes are disclosed. The method includes: receiving a code handover instruction from a base station system (BSS), where the code handover instruction carries a new code type and a new BSS user plane connection endpoint identifier, adding a new core network (CN) user plane connection endpoint according to the instruction, and receiving and sending a speech packet of the new code type through the new CN user plane connection endpoint and a BSS user plane connection endpoint corresponding to the new BSS user plane connection endpoint identifier. With the present invention, after the A-interface becomes IP-based and when the BSS performs an internal code handover, the BSS interacts with the mobile switching center (MSC) on the CN to hand over the codes between the BSS and the CN synchronously.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a coding switching method, system and equipment. Background technique [0002] When the A interface is TDM (Time Division Multiplex, time division multiplexing), for the Codec (coding and decoding) switching initiated by the BSC (Base Station Controller, base station controller) according to the air interface resources, or across the BTS (Base Transceiver Station, base station Trans-Coder (Trans-Coder, code conversion) function of the BSC detects the change of the wireless Codec when the Codec is changed due to switching of the transceiver) and sends it to the core network. During this process, the switching or changing of the Codec of the call is invisible to the core network. [0003] After the A interface is IP-based, for the voice service, the transmission between BSC and MGW (Media Gateway, Media Gateway) is GSM (Global System for Mobile Communications, Gl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W88/18
CPCH04W36/0055H04W88/181
Inventor 李国宏李峰罗少华
Owner HUAWEI TECH CO LTD
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