COMIC: intelligent contention window control for distributed medium access

Authors:
Subodh Pudasaini;Moonsoo Kang;Seokjoo Shin;John A. Copeland
Affiliations:
Department of Computer Engineering, Chosun University, Gwangju, Republic of Korea;Department of Computer Engineering, Chosun University, Gwangju, Republic of Korea;Department of Electronics and Computer Engineering, Georgia Institute of Technology;Department of Electronics and Computer Engineering, Georgia Institute of Technology
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

In this letter, a scheme for Collision Mitigation with Intelligent Contention Window Control (COMIC) is proposed for backoff based collision resolution algorithm. COMIC intelligently mitigates collisions by probabilistically maximizing the selection likelihood of relatively less collision-probable contention slots over the backoffed contention window. A unified Markovian model for the Distribution Coordination Function (DCF) that incorporates COMIC, DCFcomic, is formulated for the performance analysis. The performance results show that DCFcomic outperforms the conventional DCF in both throughput and average packet delay due to the significant reduction in packet collisions.