peerTalk: A Peer-to-Peer Multiparty Voice-over-IP System

Multiparty voice-over-IP (MVoIP) services allow a group of people to freely communicate with each other via the Internet, which have many important applications such as online gaming and teleconferencing. In this paper, we present a peer-to-peer MVoIP system called peerTalk. Compared to traditional approaches such as server-based mixing, peerTalk achieves better scalability and failure resilience by dynamically distributing the stream processing workload among different peers. Particularly, peerTalk decouples the MVoIP service delivery into two phases: mixing phase and distribution phase. The decoupled model allows us to explore the asymmetric property of MVoIP services (for example, distinct speaking/listening activities and unequal inbound/outbound bandwidths) so that the system can better adapt to distinct stream mixing and distribution requirements. To overcome arbitrary peer departures/ failures, peerTalk provides lightweight backup schemes to achieve fast failure recovery. We hav...

• Type: Journal
• Year: 2008
• Where: TPDS
• Authors: Xiaohui Gu, Zhen Wen, Philip S. Yu, Zon-Yin Shae
• Keywords: Multiparty Voice-over-IP, MVoIP Service Delivery, Mvoip Services, TPDS 2008