Switching control method for public switched telephone network (PSTN)-Internet protocol (IP) network cooperative communication

Abstract

The invention relates to a switching control method for public switched telephone network (PSTN)-Internet protocol (IP) network cooperative communication. The method is used for non-audio communication control between PSTN-IP network cooperative multimedia telephone terminals. Communication connection is initiated by PSTN telephone dialing, telephone numbers are taken as positioning identifiers of the multimedia telephone terminals, PSTN circuit auxiliary authentication, dynamic IP addressing and switching are performed by utilizing a server system of an IP network, IP-network-based non-audio communication connection is finally established, and non-audio communication is realized between the multimedia telephone terminals. An IP-network-based non-audio communication connection protocol is taken as a core, and a login / logout control protocol, a charging information acquisition protocol and a security control protocol are also involved. By the method, a complete non-audio communication protocol is provided, the separate transmission of audios and videos is realized by a PSTN circuit switching network and the IP network, and the short delay of audio communication and the high quality of video communication are ensured at the same time.

Description

technical field [0001] The present invention relates to a PSTN-IP dual-network cooperative communication control method, in particular to a multimedia communication control method for PSTN-IP dual-network cooperative multimedia telephone terminals, the core of which is to use the PSTN telephone number as the multimedia telephone terminal The method of identifying and dynamically mapping to an IP address, and then performing network addressing interpretation, exchanging information elements, and executing control signaling belongs to the softswitch technology that utilizes PSTN lines for auxiliary authentication and exchange. Background technique [0002] IP videophone can transmit both audio and video signals through IP network at the same time, so as to realize multimedia visual communication. Because it is difficult to take into account the high-quality transmission of the two signals at the same time, the voice quality of current IP videophone is generally not high. [00...

AI Technical Summary

Problems solved by technology

These two standards have been widely used in video telephony and video conferencing communication, but neither H.323 nor SIP protocol can solve the above problems well

[0004] Transmitting audio through the PSTN circuit switching network and transmitting video and data through the IP network can make full use of the advantages of different networks to control the transmission of voice and video separately, thereby improving the quality of multimedia communication, but how to make the IP network and PSTN circuit The switching network is well integrated and coordinated, so far there is still a lack of corresponding effective integrated switching technology

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