FDDI网络实时消息传递性能评价

Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI:10.1109/RTCSA.1995.528749

P. Tsang, J. M. Ng, E. Chan, Chan-Hee Lee

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引用次数: 2

摘要

本文给出了FDDI介质接入协议和两种改进的FDDI介质接入协议的仿真结果。对于同步通信，通常有一个最后期限要求，它指定了数据包到达目的地的时间。对于FDDI，如果延迟界为D，站必须设置TTRT=D/2，以确保能够满足截止日期要求。这使得总同步带宽为D/2-T/子环/。但是，总可用同步带宽为D-T/sub - ring/，这意味着支持同步带宽的能力减半。Zheng(1992)和Leung(1994)提出了新的方案来克服这些问题，并且对异步吞吐量没有不同的影响。对这些方案进行了大量的仿真，以评估其性能特性。同时，提出了一种源站丢帧策略，并证明该策略能有效地提高同步传输的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance evaluation of real-time message delivery in FDDI networks

This paper presents the simulation results on the FDDI medium access protocols and two modified FDDI medium access protocols. For synchronous traffic, there is usually a deadline requirement which specifies the time allowed for the packet to reach its destination. For FDDI, if the delay bound is D, the stations have to set the TTRT=D/2 in order ensure the deadline requirement can be met. This gives the total synchronous bandwidth as D/2-T/sub ring/. However, the total usable synchronous bandwidth is D-T/sub ring/ which means the capability of supporting synchronous bandwidth is halved. Zheng (1992) and Leung (1994) have proposed new schemes to overcome these problems and have no diverse effect on asynchronous throughput. Extensive simulations have been carried out on these schemes to evaluate their performance characteristics. Also, a frame-drop policy at source station is proposed and shown to be effective in improving performance on synchronous transmission.

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Proceedings Second International Workshop on Real-Time Computing Systems and Applications

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