IPv6环境下基于DHT的VoIP系统的设计

Design of VoIP System Based on DHT Network over IPv6

当前基于覆盖对等网络的Voice over IP(VoIP)系统普遍采用基于分布式散列表(Distributed Hash Table,DHT)为网络模型.但DHT在设计时未考虑逻辑网络和物理网络的匹配,带来寻路时延过长的问题.在IPv6网络环境下,利用IPv6体系中地址层次性具有物理网络路由聚集的特点,并根据DHT网络本身定位具有相同IPv6前缀列表实现高效寻路这一策略,提出Chordv6模型,并用于SIP-P2P通讯.

Nowadays the VoIP systems are generally based on DHT network model. Due to the mismatch between P2P overlay and physical network, the latency in existing DHT network is rather high. According to the IPv6＇ s feature that the nodes can be clustered together by the same specific prefix length to reduce the routing latency, we use DHT network to store the information of nodes that have the same IPv6 prefix. And we adapt Chord , a famous DHT model, to SIP-P2P communication.