Abstract
The IEEE 802.3 Ethernet standard is evolving to support much higher data rates and improved quality of service. Even low cost half?duplex CSMA/CD networks can be improved using an enhanced backwards?compatible collision arbitration algorithm known as the Binary Logarithmic Arbitration Method (BLAM) now being proposed as the IEEE 802.3w draft standard. BLAM is designed to co?exist fairly with the existing Binary Exponential Backoff (BEB) algorithm, while eliminating its short?term unfairness problems. In this paper, we focus on how BLAM improves Ethernet performance for multimedia data transport. Analytical, simulation, and prototype hardware experimental results using synthetic, trace, and actual measured traffic are presented. It is shown that BLAM Ethernets can support significantly greater numbers of video streams than existing BEB Ethernets and if the delivery requirements for the video traffic are not too strict, that BLAM Ethernets can even support video if the network is completely saturated with data traffic.
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