Paper Info
Title
Towards QoS Improvements of TCP-Based Media Delivery
Abstract
The amount of audiovisual data available on the Internet and thus of multimedia communication over today's networks is increasing at a rapid pace. Despite the availability of specific media transport protocols like RTP, most content providers make use of the well-established and reliable TCP protocol to deliver audiovisual content over the Internet. The reason is that TCP-based data delivery in general is much less complicated for the clients to be served and over today's networks traversed (including proxies and firewalls), than making use of UDP-based RTP connections. However, in case of network bandwidth fluctuations and packet losses, TCP-based media delivery may lead to annoying jerky playback at the client side, due to retransmissions and late arrival of media data. This papers deals with TCP-based perceptual QoS improvement mechanisms for increasing the media experience for the consumer under unstable network conditions. Our approach is based on media content adaptation (transcoding) to fit the actual network bandwidth continuously monitored by the sender. The proposed mechanisms are applied at the application level at the server side, leaving the existing TCP implementation untouched and therefore enabling transparent use of existing media players. An evaluation of a realistic use case is presented which underlines the efficacy of our approach.
Year
DOI
Venue
2008
10.1109/ICNS.2008.10
ICNS
Keywords
Field
DocType
qos,fluctuations,quality of service,availability,transcoding,bandwidth,packet loss,use case,transport protocol,internet,transport protocols
Computer science,Network packet,Quality of service,Computer network,Packet loss,Transmission Control Protocol,TCP acceleration,Zeta-TCP,TCP tuning,TCP Friendly Rate Control
Conference
Citations 
PageRank 
References 
10
3.10
6
Authors
3
Name
Order
Citations
PageRank
Martin Prangl1446.95
Ingo Kofler215319.73
Hermann Hellwagner31114134.97