Abstract

Multimedia services such as video on demand (VOD) will require certain level of quality of services (QoS). Yet, the VOD service will be required to run on general purpose machines such as PCs or workstations and shared networks such as Ethernet and LAN ATM (Asynchronous Transfer Mode) because of cost requirements for home networking. In this environment one of the problems will become the application QoS specification [NS95] such as the video display frame rate before any negotiation for QoS guarantees starts. This paper proposes an on-line probe-based algorithm to specify initial QoS for continuous media and determine the critical degradation point when performance degradation occurs and adaptive mechanisms should be applied. This probe-based algorithm should be part of a negotiation phase to identify the actual application QoS and its degradation point. We will show the applicability of the probe-based algorithm on several experiments of a VOD service. The results show that it is wor...

Citations