Business signal transmitting method based on network agreement

Abstract

The invention relates to a service signal transmission method based on network protocol, to build and transmit voice, fax and data service on the IP successfully, and save bandwidth. Wherein, before building call, the caller and answerer consult the service type and the coding / decoding method; then normally building communication, and in the communication MGW detects the service instructions all the time, to report them to the MGC to judge the service type, and switch to relative decoding / coding method; based on fax or Modem service, and via character signal, judging if it is high-speed fax or Modem service, and using G.711Red code that supporting voice, fax and data; when it is high-speed fax or Modem service, switching into T.38 decoding / coding method; and judging the service type via the character signals as internal V21 and CM.

Description

technical field [0001] The invention relates to a service signal transmission method, in particular to a service signal transmission method based on the Internet protocol. Background technique [0002] With the rapid development of communication technology, people's expectations and requirements for personal communication are getting higher and higher. Therefore, mobile operators need to pay special attention to aspects such as user interface and service quality that directly affect the user's use of mobile services. The characteristics of the third generation (3rd Generation, referred to as "3G") mobile communication system, such as high bandwidth, multiple services, and high quality, have greatly attracted the mobile consumer market. To a certain extent, it restricts market expansion and affects the development of mobile operation affairs. [0003] In the future 3G network architecture, the mobile network is no longer limited to the circuit switching mode, and gradually e...

AI Technical Summary

Problems solved by technology

The characteristics of the third generation (3rd Generation, referred to as "3G") mobile communication system, such as high bandwidth, multiple services, and high quality, have greatly attracted the mobile consumer market. Restrict market expansion to a certain extent and affect the development of mobile operations

[0012] These two methods are very simple and convenient to implement, but they have shortcomings in terms of network bandwidth utilization and service transmission reliability. This is due to the inaccurate judgment of the service type or the unreasonable selection of the service type and its codec scheme.

[0013] In practical application, the above solution has the following problems: For the traditional TDM bearer mode, its networking cost is too high, the flexibility is not high, and it does not meet the requirements of future NGN network evolution

As for the way of IP bearer, if the general G.711 / G.711Red encoding is directly used regardless of the service type, the IP transmission bandwidth will be wasted, because the main service of the MSC is voice, and the ordinary voice can be fully satisfied by using G.729 encoding. requirements, there is no need to use G.711 / G.711Red to transmit voice services because of fax and data services

[0014] For the second solution, it is not accurate enough to judge the fax and data services only through signaling before the call is established.

Because a lot of service-related signaling can only be reflected during the call process, the exact service type cannot be judged only by the signaling interaction before the call is established. For example, the call initiated when the fixed-line fax machine Call signaling is the same, unable to judge

Moreover, the next generation network service may first establish the voice service and then use the fax service. Judging from the signaling is not accurate.

These situations will lead to serious waste of IP bandwidth, or fax and data services cannot be established due to insufficient bandwidth

For example, if there is a misjudgment and a codec that does not support fax is selected, it will lead to the failure of subsequent fax services and seriously affect service quality assurance.

[0015] The main reason for this situation is that the service type cannot be accurately judged only through the signaling before call establishment, and the appropriate codec scheme cannot be selected for transmission, resulting in waste of bandwidth or failure of service transmission

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