A Selective Delayed Channel Access (SDCA) for the High-Throughput IEEE 802.11n

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Executive Summary

In this paper, the authors investigate the potential benefits of a Selective Delayed Channel Access algorithm (SDCA) for the future IEEE 802.11n based high-throughput networks. The proposed solution aims to resolve the poor channel utilization and the low efficiency that EDCA's high priority stations adhere due to shorter waiting times and consequently to the network's degrading overall end performance. The algorithm functions at the MAC level where it delays the packets from being transmitted by postponing the channel access request, based on their traffic characteristics. As a result, the flow's average aggregate size increases and consequently so is the channel efficiency.

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