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This paper addresses two research challenges of P2PSIP: i) call setup latency ii) decentralized bootstrapping. To optimize the call setup latency of P2PSIP, we design an O(1) lookup protocol which completes the overlay routing within 3 hops most time. We also leverage the routing table of O(l) DHT to achieve decentralized bootstrapping. Experimental results indicate that 90% of bootstrapping latency...
SIP (session initial protocol) is a signaling protocol widely used in IP-based multimedia communication. Recently, P2PSIP reduces the deployment and maintenance cost, as well as improves the robustness and scalability of SIP-based system. SIP, P2PSIP network will coexist in the forthcoming future. This paper focuses on the P2PSIPand its relationship with SIP. We design and implement a P2PSIP adaptor,...
SIP (Session Initiation Protocol) is a signaling protocol widely used in multimedia communication. Recently, P2PSIP (Peer-to-Peer SIP), which combines DHT (distributed hash table) and SIP, has been proposed to overcome the drawbacks of traditional CS SIP (client/server architecture SIP). However, the introduction of DHT increases the registration overhead and, session setup overhead/latency. These...
Peer-to-peer SIP (P2PSIP) based server farm is proposed to provide distributed solution of multimedia applications. In this paper, we focus on the bandwidth requirements of both DHT and SIP packets from the perspective of a single server node in P2PSIP based server farm to quantitatively evaluate the overhead caused by distributed architecture. Furthermore, the efficiency of server node is also studied...
Session initiation protocol has been widely deployed to enable multimedia communication. To guarantee service reliability and scalability, service providers usually deploy SIP server farms. In this paper, we present a reliable and scalable DHT-based SIP server farm. In the proposed server farm, one-hop DHT is adopted and a new SIP event package called SIEP (server information event package) is designed...
This paper presents a suite of reliability mechanisms for P2PSIP-based conference services. These mechanisms can be divided into two categories. One is backup mechanism, which is designed to elect backup conference provider in a distributed and dynamic manner among all the participants of conference. The other category contains handover and failover mechanisms, which are designed to maintain continuous...
Peer-to-Peer SIP (P2PSIP) is proposed to provide fully distributed multimedia communication systems. This paper focuses on analysis of call setup delay "(CSD) of P2PSIP system to evaluate whether it could provide equivalent signaling performance to that of traditional SIP or telephone networks. Call setup delay is composed of lookup latency in DHT overlay and INVITE transaction latency, and mainly...
A transit-stub P2PSIP architecture is proposed in this paper. In this architecture, heterogeneous P2PSIP overlays are interconnected in a decentralized approach provided by a transit overlay. A special SIP element, P2PSIP router, is designed to exchange SIP routing information and route SIP messages. Our architecture reacts to the change of route information quickly. Performance analysis indicates...
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