RED-VBR: a renegotiation-based approach to support delay-sensitive VBR video

Hui Zhang, Edward W. Knightly
1997 Multimedia Systems  
Previous approaches to supporting video on packet-switched networks include deterministic service, statistical service, predicted service, and feedback-based schemes. These schemes represent di erent tradeo s in quality of service QOS, achievable network utilization, and method of dealing with overload. In this paper, we propose a new service called REnegotiated Deterministic Variable Bit Rate Service RED-VBR that attempts to strike an e cient balance with the above tradeo s. The approach is
more » ... ed on deterministic guarantees with client controlled renegotiation of tra c and QOS parameters and graceful adaptation during overload periods. We i n troduce a connection admission control algorithm for RED-VBR which bounds the renegotiation failure probability. W e e v aluate the scheme using two traces of MPEG-compressed video and show that, even with simple renegotiation polices and relatively low renegotiation frequencies, high network utilization in the range of 50 to 80 can be achieved. For tra c that is bursty o v er long intervals, this represents a 100 to 150 improvement in network utilization compared to deterministic service. Compared to statistical and predicted service, our approach allows more graceful and client-controlled QOS degradation during overload period.
doi:10.1007/s005300050053 fatcat:5mba4g7mqfbdrdek4huibdvv4m