Abstract
Abstract In broadband networks, flow control functions are shifted to the edges of the network and implemented on an end-to-end basis. Access flow control is then essential to avoid congestion. In this paper we present and analyse an access flow control algorithm which is applied at the access nodes to the network, specifically at the input voice and video multiplexers. The algorithm uses a control signal proportional to the multiplexer congestion level to throttle the peak bit rate of the input arrival process. Two congestion thresholds (K1, K2) are used to limit the number of cells in the multiplexer buffers. The threshold levels are a function of the input traffic characteristics. We analyse the resulting quasi Birth-Death queueing process for a video-buffer multiplexer. Some performance analysis parameters such as the blocking probability and the average number of bits per sample are presented.
Published Version
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