Designation and Realization of the Interworking Gateway between IMS and PSTN

Abstract:

The interworking with the PSTN network is a network integration issues which must be solved. M2PA, M2UA and M3UA were compared and M3UA was selected because of its stronger flexibility. For the convenience of equipment expansion, IP switch was used in the hardware designation of PSTN Gateway. The software designation was based on independent entity. Socket communication mode which is loosely coupled was used between different entities. The software was divided into the SIP Proxy Module, the Signal Adapter Module, the Service Adapter Module, the Code and Decode Resource Control Module, and so on. The conversion of format, code, identification between SIP and No.7 signaling was realized. Multi-channel controller was used in the conversion of voice stream between the E1 interface circuit mode and RTP/RTCP mode. The interworking between PSTN and IMS was realized through the gateway and the old equipments can be used in the new network. This work is helpful to promote the network integration work.

• Periodical: Applied Mechanics and Materials (Volumes 513-517)
• Pages: 2542-2547
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.513-517.2542
• Online since: February 2014
• Authors: Hong Shuo Liang*, Hong Bo Wang, Juan Hou
• Keywords: Codec, IP Multimedia Subsystem, Media Gateway, Public Switched Telephone Network, Signaling Gateway, Signaling System 7(SS7)

References

[1] JunXia Zhang, The next generation of network based on IMS technology and its development prospect", China, s new communication, December 2012, pp.16-17, In Chinese.

[2] Dan Xu and Hao Shen, network convergence of fixed mobile based on IMS, Silicon Valley, November 2012, In Chinese.

[3] Xuan wang, IMS key technology and its application in telecom operators, Master Thesis, December 2011, In Chinese.

[4] Yan Zhang, Based on analysis of IMS core network evolution, Digital Technology and Application, September 2012, In Chinese.

[5] Yuan Sun, Yi Jin, Analysis of the IP evolution of the No. 7 signaling network , January 2007, pp.81-88, In Chinese.

[6] XiaoTing Fu, Evolution of fixed network softswitch to IMS network integration, No. 13 2012, pp.66-68, In Chinese.

[7] Xu Chen , YuYi Zhao and Hao Zhang, QB-C-015-2008 the technical specification of China mobile No. 7 signaling network signaling (STP) equipment(version number: 1. 0. 0) , China mobile communications , no published, In Chinese.

[8] Zhou Xu, Softswitch Interworking with PSTN networks inTriple play, Radio &television information , No. 7 2011, pp.43-33, In Chinese.

[9] R. Sparks. The Sessiion Initiation Protocol(SIP) Refer Method[G]. IETF Draft. April (2003).

[10] 3GPP. TS 24. 228. Signaling flows for the IP multimedia call control based on Session Initiation Protocol(SIP)and Session Description Protocol(SDP), Stage 3, v5. 14. 0, 2005. 12.

DOI: 10.1515/9783486859225-006