LPDHT: A Locality-Aware and Partitioned-Space Architecture for Peer-to-Peer SIP

SIP is a signaling protocol widely used in multimedia communication. Recently, P2PSIP, which combines DHT and SIP, has been proposed to overcome the drawbacks of traditional CS SIP. Although P2PSIP has many advantages, the introduction of P2P also brings in some disadvantages in performance. And these disadvantages become unbearable in a huge P2PSIP overlay in Internet environment. To address these problems, we propose a novel DHT architecture for P2PSIP, LPDHT, whose full name is Locality-Aware and Partition-Space DHT. In the super nodes form P2PSIP, LPDHT can reduce not only DHT routing hop count and latency per DHT hop, but also the overall overhead. Therefore it can improve system capacity greatly. Performance analysis indicates that overall overhead are reduced dramatically in LPDHT.