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Based on technologies such as IP Telephony Voice Gateway System

Author: ShuChang
Tutor: ZhangQin
School: Huazhong University of Science and Technology
Course: Applied Computer Technology
Keywords: Session Initiation Protocol Public Switched Telephone Network Peer technology Voice Gateway
CLC: TN916.2
Type: Master's thesis
Year: 2011
Downloads: 10
Quote: 1
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Abstract


Session Initiation Protocol SIP (Session Initiation Protocol) is widely used in Internet telephony VoIP (Voice on IP) systems. However, over-reliance on traditional SIP SIP network central control server , resulting in poor system reliability , maintenance costs are high, the peer P2P (Peer-to-Peer) technology into the SIP network , can solve these problems. VoIP systems in order to provide better and more comprehensive services , needs and the public switched telephone network PSTN (Public Switched Telephone Network) communicate with each other , which made the P2P-based SIP VoIP system voice gateway system . System based on P2P SIP VoIP voice gateway system is the PSTN network and IP network connecting bridge. It implements the SIP signaling conversion and PSTN signaling and media data conversion. Voice Gateway systematic study of the P2P technology and the integration of the SIP protocol , proposed and implemented in the SIP protocol uses P2P technology to achieve a voice gateway node VGW (Voice GateWay node) in large-scale P2P SIP network access and maintenance algorithm , so VGW through voice gateway management node GWMN (GateWay Management Node) managed to get the voice gateway resources , and can dynamically join or leave the network and achieve self- maintenance updates , to achieve the VGW in P2P SIP voice gateway network resources released and search algorithms , VGW the obtained voice gateway resource in the network to publish, and bear the resource search process. Between studies based GWMN VGW Fenwick management, according to VGW geographical difference in the P2P SIP network to join after Fenwick managed to achieve a voice gateway system discovery strategy and load balancing strategies , according to the current load capacity VGW sessions are assigned and completed through GWMN voice gateway resource discovery mechanism . Through the actual deployment of the system and the simulation test to verify the voice gateway system. In the simulation system, the system call delay call capacity and test results can be seen from the test system's call the voice gateway establishing ITU proposed standard for Internet telephony and verify a large-scale deployment of voice gateway system feasible and robustness .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Phone > Telephone lines, telephone network
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