Traffic Prioritization for Carrier Sense Multiple Access with Enhanced Collision Avoidance

Carrier sense multiple access with enhanced collision avoidance (CSMA/ECA) is a simple MAC protocol for wireless local area networks that significantly outperforms CSMA/CA. This paper addresses traffic prioritization in CSMA/ECA using different minimum contention windows for different traffic classes. The conditions under which the collision-free operation is possible are presented and expressions for the steady-state channel efficiency are provided. Simulation results show that CSMA/ECA improves the channel utilization achieved by all traffic classes whenever the conditions for collision-free operation are satisfied.

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