The support of optical network protocols for multimedia ATM traffic

摘要

Multimedia application integrates a variety of media, namely,naudio, video, images, graphics, text, and data, each of which havendifferent quality of service (QOS) requirements. In this paper wenevaluate the support of reservation-based high speed protocols includingnDQDB (distributed queue dual bus), CRMA (cyclic-reservationnmultiple-access), DQMA (distributed-queue multiple-access), and FDQn(fair distributed queue), for various multimedia traffic including lownand medium quality video, high quality MMPEG video, and data traffic.nThrough extensive experiments, we vary different traffic and protocolnparameters including transmission rate, delay and loss constraint, datanload and data burstiness, to determine the number of multimedia sessionsnsupported by each of the four protocols. Delay constraints have moderateneffect on some of the protocols, but loss constraints have very littleneffect on any protocol. Bursty data significantly degrade real-timentraffic performance, but the negative effect is almost corrected whenndelay constraint is somewhat relaxed. These results show that thenreservation-based protocols are suitable for integrating real-timenmultimedia traffic with bursty data traffic in very high speed network,nespecially when delay constraint is somewhat relaxed. Due to itsnexcellent fairness, FDQ clearly stands out to be the best protocol amongnfour to support heterogeneous traffic