A Study of Traffic Locality and Reliability in Peer-to-Peer Video Streaming Applications
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Authors
Zhang, Xiangyang
Date
2012-04-27
Type
thesis
Language
eng
Keyword
peer-to-peer network , video streaming
Alternative Title
Abstract
The past decade has witnessed tremendous growth of peer-to-peer (P2P) video
streaming applications on the Internet. For these applications, playback
smoothness and timeliness are the two most important aspects of users' viewing
experiences, whereas the amount of traffic is Internet service providers' main
concern. According to the playback delay, video streaming can be classified into
on-demand streaming, live streaming, and interactive streaming. P2P live
streaming applications typically have an arbitrary number of users, tens of
seconds of playback delay, and a high packet delivery rate, but their heavy
traffic incurs great financial expenditure and threatens the quality of other
services. Interactive streaming applications usually have a small group size,
several hundreds of milliseconds of playback delay, and reasonable traffic
volume, but cannot achieve a high packet delivery rate. The goal of this thesis
is to study traffic locality and reliable delivery of packets in large-scale
live streaming and small-scale interactive streaming applications, while keeping
the playback delay well below the targeted applications' limits.
For P2P live streaming applications, we first identify "typical" schemes from
existing P2P live streaming schemes, investigate packet propagation behavior and
the impact of neighboring strategies on system performance, and then propose
innovative schemes that take both users' viewing experience and traffic locality
into consideration. We show that the network-driven tree-based schemes with the
swarming technique as a re-transmission error-correction mechanism are superior
to the data-driven swarm-based or tree-based schemes, and a properly designed
tree-based scheme can localize the traffic while maintaining a high packet
delivery rate.
For interactive streaming applications, we analyze the efficacy of systematic
forward error-correction (FEC) codes against the bursty errors of Internet links
when using peers to provide multiple one-hop paths between two communication
parties. We find that although using peers for path diversity often results in
a lower post-FEC packet loss ratio, some conditions do apply. The interplay of
a number of factors, such as the Internet links' error ratio and burst length
and the coding parameters, determines the performance of FEC. We provide
guidelines and computation methods to determine whether the use of peers for
path diversity can be justified.
Description
Thesis (Ph.D, Computing) -- Queen's University, 2012-04-26 15:20:35.555
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