Offering Reliability and Interactivity for Peer-to-Peer Streaming

The Hong Kong University of Science and Technology
Department of Computer Science and Engineering


PhD Thesis Defence


Title: "Offering Reliability and Interactivity for Peer-to-Peer Streaming"

By

Mr. Wai-Pun Yiu


Abstract

Peer-to-peer technologies have enabled large-scale media streaming
services over the Internet. Relatively speaking, there has not been much
work on enhancing reliability and supporting user interactivity in P2P
media streaming systems. However, providing these features is challenging
due to unreliability of end-hosts and difficulty in locating supplying
peers. In this thesis, by addressing these issues, we targeted to offer
reliability and interactivity in such systems.

For offering reliability, scalable error recovery techniques are required.
We propose a novel error recovery scheme called LER, in which we improve
the recovery probability by performing packet retransmission from nodes
whose errors are less correlated. Results show that LER achieves better
residual loss rate than traditional parent and source recovery schemes.

For offering interactivity, efficient mechanisms for locating supplying
peers are important for supporting interactive functions like random
forward/backward seek. We propose two media streaming architectures,
namely, PRIME and VMesh. While PRIME uses virtual starting slot to locate
supplying peers by DHT search, VMesh uses dynamic distributed segment
storage to solve parent activity problem. We show empirically our schemes
outperform previous work in terms of startup/seeking latency and playback
continuity.


Date:			Wednesday, 23 January 2008

Time:			11:00a.m.-1:00p.m.

Venue:			Room 3402
			Lifts 17-18

Chairman:		Prof. Xinyang Wang (HUMA)

Committee Members:	Prof. Gary Chan (Supervisor)
			Prof. Mounir Hamdi
			Prof. Xin Li
			Prof. Oscar Au (ECE)
			Prof. Jack Lee (Inf. Engg., CUHK)


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