基于自相似业务模型的实时调度算法研究
Performance Evaluation of the Real-Time Scheduler Algorithm under Self-similar Network Traffic
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摘要: 该文提出了一种基于MAC层协议的CSMA-DAMA实时调度算法，可以更好地支持多媒体业务的实时传输。对此调度算法的性能进行了理论和仿真分析。在分析中采用了能更好地反映多媒体业务特性的自相似模型，使性能的评价更加准确。通过引入按需分配机制和漏桶算法，使其在实时数据传输性能的各个方面均得到有效提高，可以更好地满足多媒体业务的实时性要求。Abstract: A new scheduler algorithm CSMA-DAMA based on the Media Access Control (MAC) sublayer is proposed, which could provide a better service for the multimedia real-time transmission. Theoretical and simulation analyses of the performance are given in which the self-similar model are used to characterize the multimedia traffic better and make the evaluation more precisel. This algorithm obtains a great improvement in the performance of the real-time data transmission and satisfies the real-time requirement of the multi-media traffic better by introducing the assignment on demand and leaky bucket algorithm.
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Erramilli A, Roughan M, Veitch D, Willinger W. Self-similar traffic and network dynamics[J].Proc. IEEE.2002, 90(5):800-[2]Leland W, Taqqu M S, Willinger W, et al.. On the self-similar nature of ethernet traffic(Extended Version)[J].IEEE/ACM Trans. on Networking.1994, 2(2):1-[5]白成林. 一种基于CSMA/CD的优先级随机分割的综合业务局域网协议[J].小型微型计算机系统.2003, 24(11):1916-[9]沈伟, 冯瑞, 邵惠鹤. 自相似通信量下的CSMA/CD性能分析. 计算机工程, 2003 (8): 30.34.[10]Willinger W, Taqqu M S, Sherman R, et al.. Self-similarity through high-variability: Statistical analysis of ethernet LAN traffic at the source level[J].IEEE/ACM Trans. on Networking.1997, 5(1):71- -
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