Broadband and narrowband converged communication system and method used under public private network IP interconnection

Abstract

The invention provides a broadband and narrowband converged communication system and method used under public private network IP interconnection. According to the invention, a broadband terminal is registered to a FreeSWITCH server through a standard SIP protocol, and a narrowband terminal is registered to the FreeSWITCH server through a DMR relay station or a DMR cluster system; by modifying a FreeSWITCH module source code so that the FreeSWITCH server is compatible with an AIS protocol of a DMR relay station, corresponding media coding format conversion is carried out on different terminalsthrough the multimedia coding conversion function of the FreeSWITCH, and therefore the broadband terminal and the narrowband terminal are fused together, and the fusion communication function is achieved. The DMR channel resources can be released in time through PTT speaking right control, the corresponding offline channels are recalled in combination with intelligent routing selection, and the utilization rate of the channel resources of the relay station is improved to the maximum extent.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a broadband and narrowband fusion communication system and method for public and private network IP interconnection. Background technique [0002] In recent years, with the continuous development of network technology, especially the leap from narrowband technology to 4G LTE broadband technology, and the potential market prospects, private network equipment vendors and public network equipment vendors have appeared in the market at the same time. And end users are no longer satisfied with the narrowband requirements of ordinary voice intercom and short data transmission, but instead pursue various multimedia services based on data services. Such as video intercom, conference call, real-time image transmission, location information, voice alarm, etc., in view of the application scenarios of various users and the advantages and disadvantages of public and private netw...

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Problems solved by technology

[0005] (2) The traditional narrowband communication technology is different from the broadband communication protocol, and the frequency is not available, and the purpose of converged communication cannot be achieved through simple IP interconnection; the media coding standards supported by each communication terminal are inconsistent, and in the communication process, it is necessary to make corresponding adjustments for different terminals Media encoding format conversion and guaranteed media weight

[0006] (3) DMR (Digital Mobile Radio, Digital Mobile Radio) repeater or DMR trunking system (TierIII) channel resources are inherently limited. In a converged intercom conference, if other broadband terminal communication methods are used, the communication connection will always be maintained during the conference. state, it will occupy the channel resources of the repeater for a long time, causing other DMR intercom terminals to fail to communicate due to insufficient channel resources

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