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Coding and decoding network transparent transmission method, device thereof and system thereof

A network transparent transmission, encoding and decoding technology, which is applied in the transmission system, information format, content conversion, etc., can solve the problems of poor voice signal quality and lower voice signal quality, and achieve the effect of reducing the number of encoding and decoding times and improving signal quality

Inactive Publication Date: 2014-08-06
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the codec degrades the quality of the speech signal
When the calling party and the called party initiate a voice call, the voice signal needs to be encoded and decoded multiple times, which will result in poor voice signal quality

Method used

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  • Coding and decoding network transparent transmission method, device thereof and system thereof
  • Coding and decoding network transparent transmission method, device thereof and system thereof
  • Coding and decoding network transparent transmission method, device thereof and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 of the present invention provides a method for encoding and decoding network transparent transmission, such as figure 1 shown, including:

[0030] Step 101, the mobile switching center on the calling side receives a call request.

[0031] Step 102, when the calling side mobile switching center judges that the call request is an enhanced call, the calling side mobile switching center uses the code stream format supported by the calling side dedicated mobile switching center to send the call request carrying the enhanced identification Send it to the special mobile switching center on the calling side.

[0032] The calling side mobile switching center judges that the call request is an enhanced call according to the enhanced identification carried in the call request; or the calling side mobile switching center queries the called side HLR for routing according to the called number carried in the call request , when the query result carries parameters corres...

Embodiment 2

[0038] Embodiment 2 of the present invention provides a method for encoding and decoding network transparent transmission, which is applied to such as figure 2 In the system shown, the system includes UE a, calling MSC a, EMSC (Especial Mobile Switching Center, private mobile switching center) a, TMSC (Tandem Mobile Switching Center, tandem mobile switching center), EMSC b, called HLR b. Called MSC b, UE b, wherein, each EMSC supports the same codec method, for example, only supports the same codec method, such as G.711 codec, therefore, the format of the code stream when communicating with the EMSC is G .711 encoding format. When the codec method supported by EMSC is not unique, the codec format used when communicating with EMSC is configured as the codec method supported by EMSC. At this time, the format of the codec stream during communication is the codec with the highest priority supported by each EMSC stream format. Among them, the EMSC can configure G.711 encoding ba...

Embodiment 3

[0065] Embodiment 3 of the present invention provides a codec network transparent transmission method, still combining figure 2 As shown, the function of each device is similar to that in Embodiment 1, and the flow process of the method is as follows Figure 4 shown, including the following steps:

[0066] 1. UE a initiates an enhanced call, and adds an enhanced call prefix to the called number;

[0067] 2. The calling MSC a receives the call with the enhanced call prefix. Then the calling MSC a routes the call to the EMSC a belonging to the local area according to the called number prefix;

[0068] 3. EMSC a strips the prefix of the called number and uses the called number without the prefix to obtain the MSRN from the called HLR, and identifies the call as an enhanced call according to the prefix of the called number;

[0069] 4. The called HLR inquires about the MSRN from the called MSC b;

[0070] 5. The called MSC b returns the MSRN to the called HLR;

[0071] 6. Th...

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Abstract

The invention discloses a coding and decoding network transparent transmission method, a device thereof and a system thereof. The method comprises the following steps: a calling side mobile switching center receives a call request; when the calling side mobile switching center determines that the call request is an enhanced call, a code stream format supported by a calling side special-purpose mobile switching center is used to send a call request with enhanced identification to the calling side special-purpose mobile switching center; the calling side special-purpose mobile switching center acquires route information of a called side, and according to the route information of the called side, a self-support code stream format is used to send a call request; a called side mobile switching center receives a call request using the code stream format supported by the calling side special-purpose mobile switching center, and sends a call request route to a called terminal. According to the method, the device and the system in the invention, frequency of coding and decoding of a voice signal in a network transmission process is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a codec network transparent transmission method, device and system. Background technique [0002] In the prior art, when voice signals are transmitted in the wireless access network and the core network, different encoding and decoding methods are often used in different network segments. For example, the code stream format transmitted in the wireless access network and the code stream format transmitted in the core network are usually different code stream formats, so when the voice signal reaches the core network from the wireless access network, it needs to be encoded and decoded to adapt to the core network. Requirements for the stream format. Even when voice signals are transmitted within the core network, since the code stream formats supported by various devices in the core network (such as MSC (Mobile Switching Center, Mobile Switching Center)) are currently inconsisten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/18H04L29/06
Inventor 魏冰李凯张晓儒薛越
Owner CHINA MOBILE COMM GRP CO LTD