X-Net is a new local area network based on the dual, unidirectional bus topology. Stations are connected to two fiber-optic busses using active switches. At light load, X-Net behaves as a random access scheme. With increasing load, transmissions are done in an orderly manner, arranged into cycles.
rnThe main advantage of X-Net is its superior channel utilization and delay performance, compared to other bus schemes. The packet delay is bounded at all loads. Performance is shown to be satisfactory over a wide range of a values, where a is the ratio of end-to-end medium propagation delay to the packet transmission time. Therefore, X-Net is a suitable candidate for operation at high speeds.
X-Net是基于双向单向总线拓扑的新局域网。工作站使用有源开关连接到两条光纤总线。在轻负载下,X-Net表现为随机访问方案。随着负载的增加,传输以有序的方式进行,并按周期排列。 P> rn
与其他总线方案相比,X-Net的主要优势在于其出色的信道利用率和延迟性能。数据包延迟在所有负载下都有限制。在较大的a值范围内表现出令人满意的性能,其中a是端对端媒体传播延迟与数据包传输时间的比率。因此,X-Net是高速运行的合适选择。 P>
Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada;
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