Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Implementation and evaluation of the QoS-A transport system
AU - Campbell, A
AU - Coulson, G
PY - 1997
Y1 - 1997
N2 - The long awaited 'new environment' of high speed broadband networks and multimedia applications is fast becoming a reality. However,few systems in existence today, whether they be large scale pilots or small scale test-beds in research labs, offer a fully integrated and flexible environment where multimedia applications can maximally exploit the quality of service (QoS) capabilities of supporting networks and end-systems. In this paper we describe the implementation of an adaptive transport system that incorporates a QoS oriented API and a range of mechanisms to assist applications in exploiting QoS and adapting to fluctuations in QoS. The system, which is an instantiation of the QoS Architecture (QoS-A), is implemented in a multi ATM switch network environment with Linux based PC end systems and continuous media file servers. A performance evaluation of the system configured to support Video-on-Demand application scenario is presented and discussed. Emphasis is placed on novel features of the system and on their integration into a complete prototype. The most prominent novelty of our design is a 'distributed QoS adaptation' scheme which allows applications to delegate to the system responsibility for augmenting and reducing the perceptual quality of video and audio flows when resource availability increases or decreases.
AB - The long awaited 'new environment' of high speed broadband networks and multimedia applications is fast becoming a reality. However,few systems in existence today, whether they be large scale pilots or small scale test-beds in research labs, offer a fully integrated and flexible environment where multimedia applications can maximally exploit the quality of service (QoS) capabilities of supporting networks and end-systems. In this paper we describe the implementation of an adaptive transport system that incorporates a QoS oriented API and a range of mechanisms to assist applications in exploiting QoS and adapting to fluctuations in QoS. The system, which is an instantiation of the QoS Architecture (QoS-A), is implemented in a multi ATM switch network environment with Linux based PC end systems and continuous media file servers. A performance evaluation of the system configured to support Video-on-Demand application scenario is presented and discussed. Emphasis is placed on novel features of the system and on their integration into a complete prototype. The most prominent novelty of our design is a 'distributed QoS adaptation' scheme which allows applications to delegate to the system responsibility for augmenting and reducing the perceptual quality of video and audio flows when resource availability increases or decreases.
M3 - Conference contribution/Paper
SN - 0-412-75850-4
T3 - IFIP Advances in Information and Communication Technology
SP - 201
EP - 218
BT - Protocols for High-Speed Network V
A2 - Dabbous, Walid
A2 - Diot, Christophe
PB - Chapman & Hall
CY - London
T2 - IFIP 5th International Workshop on Protocols for High-Speed Networks (PFHSN 96)
Y2 - 28 October 1996 through 30 October 1996
ER -