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Method and system for implementing encode/decode-free operation

A codec-free operation and implementation method, applied in the field of voice communication, can solve problems such as increasing interaction delay, affecting call quality, and inconsistency in encoding methods, achieving the effects of improving voice quality, reducing signaling load, and achieving fast tracking.

Active Publication Date: 2009-03-04
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The defect of the prior art is that: the above-mentioned TFO coding set interaction process increases the interaction delay and increases the signaling load of TFO operation
[0011] In addition, in the communication process, there will be inconsistencies in the encoding method caused by the switching of the encoding method
Due to the influence of interaction delay, TFO may not be able to track the switching speed of the AMR coding mode in time, thus affecting the timely tracking of the communication environment, making it difficult to ensure timely adjustment and improvement of voice quality
thereby affecting call quality

Method used

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  • Method and system for implementing encode/decode-free operation
  • Method and system for implementing encode/decode-free operation
  • Method and system for implementing encode/decode-free operation

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] This embodiment provides a TFO implementation method, such as image 3 shown, including:

[0033] In step 101, the calling terminal TC and the called terminal TC send pre-synchronization signals to each other for initialization, so as to notify the other party that they are ready to start TFO operation.

[0034] Wherein, the calling terminal TC refers to the TC corresponding to the calling party terminal that initiates the session establishment request; the called terminal TC refers to the TC corresponding to the called party terminal that establishes a session with the calling party terminal.

[0035] In step 102, the calling terminal TC and the called terminal TC respectively send negotiation request messages carrying the coding mode currently adopted by the terminal to the opposite terminal.

[0036] For example, it is assumed that the coding mode of the calling terminal TC is x; the coding mode of the called terminal TC is y. Then the encoding method carried in th...

Embodiment 2

[0050] This embodiment provides a codec-free operation realization system, such as Figure 5 As shown, including TC1 and base station controller 2. Where TC1 includes: a first unit 10, a second unit 20, a third unit 30 and a fourth unit 40. TC1 and base station controller 2 can be as figure 1 The way shown is connected to the GSM communication system. In this embodiment, the TC connected to the calling end is called the calling end TC; the TC connected to the called end is called the called end TC. The specific implementation method of TFO based on this system is as follows:

[0051] After the calling terminal TC and the called terminal TC complete the initialization, they send negotiation request messages carrying the encoding mode of the local terminal to each other.

[0052] The first unit 10 of the calling end or the called end TC1 receives the negotiation request message from the opposite end; the second unit 20 according to the encoding method of the opposite end cod...

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Abstract

The invention relates to a realizing method free of encoding and decoding operations, and a system thereof, wherein, the method comprises the steps that: after respectively receiving a consultation request message from an opposite terminal, a calling terminal TC and a called terminal TC judge whether both encoding manners adopted by the two terminals pertain to the AMR mode and are the same; when both encoding manners adopted by the two terminals pertain to the AMR mode but are different, the encoding manner adopted by the home terminal is switched into an encoding manner with relatively low encoding speed in the encoding manners adopted by the calling terminal and the called terminal; TFO frame transparent transmission is carried out based on the same encoding manner after switching. The system comprises a code converter and a base station controller. As TFO code set consultation process in the prior art is omitted, the method and the system are capable of effectively reducing interaction time delay during the establishment of TFO and the signaling load of TFO and timely realizing the improvement of speech quality.

Description

technical field [0001] The present invention relates to a codec-free operation implementation method and system, in particular to a codec-free operation implementation method and system when an adaptive multi-rate mode is adopted, and belongs to the technical field of voice communication. Background technique [0002] In the second generation mobile communication network (GSM), the communication parties of the voice service usually need to use a certain voice coding method to transmit the signal to the opposite end through the wireless network and the core network. Such as figure 1 As shown, it is a structural schematic diagram of an existing GSM communication system, which mainly includes a mobile station, a base transceiver station (basetransceiver station, referred to as: BTS), a base station controller (Base Station Controller, referred to as: BSC) and a mobile switching center (Mobile Switching Center, Abbreviation: MSC). [0003] In the wireless network, the signal t...

Claims

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Application Information

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IPC IPC(8): H04Q7/22G10L19/14G10L19/16
Inventor 杨光
Owner CHINA MOBILE COMM GRP CO LTD
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