Delay insertion based P2PTV traffic localization considering available bandwidth of logical link

Recently, the live video streaming application using P2P multicasting called P2PTV attracts attentions as a means to deliver live streaming video to a large number of users since the server load becomes low compared with a unicast-based delivery. Since many current P2PTV services choose a relay peer for a newly joining peer without considering the network distance between peers, the end-to-end router hop length of a path from the server to the peer tends to be much longer compared with a unicast-based streaming, and this increases the network traffic. For this problem, delay-insertion-based traffic localization scheme was proposed. However, this scheme sometimes leads the new peer to connect with a neighbor peer to which the path has small available bandwidth, and the video quality seriously degrades. The paper proposes a novel scheme of delay-insertion-based traffic localization in which the router estimates a bandwidth to each of relay peer candidates and leads the newly joining peer to connect with a neighbor peer to which the path has sufficient available bandwidth.