The Influence of Buffer Management on End-to-End Cell Delay in a Cell Switching Network

概要

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This is the first paper to report the influence of fuzzy thresolding-based buffer management.scheme on the end-to-end delay performance of cell switching networks including asynchronous transfer mode (ATM) networks. In this approach, the fraction of the selectively blocked cells, corresponding to the difference of cell loss due to buffer overflow, between the traditional fixed and fuzzy schemes, are re-routed to their final destinations. A 50-switch, representative, cell-switching network under fuzzy thresholding is first modeled, second, simulated on a testbed consisting of a network of 25 + Pentium workstations under Linux, con figured as a loosely-coupled parallel processor, and third, its performance is studied under realistic input traffic conditions. A total of 10,000 user calls, generating between 1.0 and I.5 million ATM cells, is stochastically distributed among the nodes. Performance analysis reveals that for different input traffic distributions ranging from light to moderate to heavy traffic, the re-routing approach successfully routes these blocked cells, although it causes the average end-to-cnd cell delay in the network to increase, compared to the fixed scheme, by a factor ranging from 1.65 for relatively light traffic to 6.7 for heavy traffic.
社団法人電子情報通信学会の論文
2003-03-01