CSMA with Enhanced Collision Avoidance: a Performance Assessment

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Executive Summary

CSMA with Enhanced Collision Avoidance (CSMA/ECA) uses a deterministic back-off after successful transmissions to significantly reduce the number of collisions. This paper assesses by means of simulations the throughput and conditional collision probability obtained from a single-hop ad hoc network using CSMA/ECA. A comparison with the legacy CSMA/CA reveals that the proposed protocol outperforms the legacy one in all considered scenarios. Specifically, it is shown that CSMA/ECA presents advantages for both rigid and elastic flows. The proliferation of IEEE 802.11 networks makes the research associated to this family of protocols particularly relevant. After its success in Wireless Local Area Networks (WLANs), the IEEE 802.11 family is growing to cover other fields of applications, such as mesh and vehicular networks.

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