Real-Time Transport of MPEG Video with a Statistically Guaranteed Loss Ratio in ATM Networks

  • Authors:
  • Seok-Kyu Kweon;Kang G. Shin

  • Affiliations:
  • Cisco systems, San Jose, CA;Univ. of Michigan, Ann Arbor

  • Venue:
  • IEEE Transactions on Parallel and Distributed Systems
  • Year:
  • 2001

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Abstract

Unlike deterministic real-time communication in which excessive resources may be required for 驴absolute驴 performance guarantees, statistical real-time communication seeks to achieve both probabilistic performance guarantees and efficient resource sharing. This paper presents a framework for statistical real-time communication in ATM networks, providing delay-guaranteed transport of MPEG-coded video traffic with a statistically-guaranteed cell-loss ratio. Delay-guaranteed communication is achieved with a modified version of Traffic-Controlled Rate-Monotonic Priority Scheduling (TCRM). A set of statistical real-time channels that share similar traffic characteristics are multiplexed into a common macrochannel. Those statistical real-time channels which are multiplexed together share the resources of a macrochannel, and individual statistical real-time channels are given timeliness and probabilistic cell-loss guarantees. A macrochannel is serviced by the modified TCRM which improves link utilization and makes channel management simpler. Based on the analysis of an $M/D/1/N$ queueing system, we propose a procedure for determining the transmission capacity of a macrochannel necessary to statistically guarantee a cell-loss ratio bound. Our extensive trace-driven simulation has shown the superiority of the proposed framework to the other approaches. The overall cell-loss ratios for multihop statistical real-time channels are shown to be smaller than the predetermined bounds, thus verifying our analytical results.