C3F2-DMAC: clustered contention and contention free fully decentralized MAC for the 3M environment: Real-time multimedia, multi-hop, and mobile

Authors:
Osama Farrag;William D'Amico;Lotfi Benmohamed
Affiliations:
Research and Technology Development Center, The Johns Hopkins University, Laurel, MD;Research and Technology Development Center, The Johns Hopkins University, Laurel, MD;Research and Technology Development Center, The Johns Hopkins University, Laurel, MD
Venue:
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Year:
2006

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Abstract

In this paper we describe a novel Medium Access Control (MAC) solution for establishing a wireless LAN capable of supporting contention and contention free access on the same channel for use in Mobile Ad-Hoc Networks (MANET). This new MAC protocol is fully decentralized and allows any number of mobile stations to share a common wireless channel and collaborate in managing its resources. These stations will partition the channel bandwidth into non contiguous Contention Free Periods (CFP) and Contention Periods (CP). Each CFP is assigned exclusively for one station to transmit data to other stations within range. Each CFP will occur at fixed periodic interval and transmission during CFP will not be preceded by random back-off period. Stations may contend to transmit data using CSMA/CA method during any CP. The stations will selforganize into clusters and will employ distributed algorithms to share the channel capacity in temporal and spatial dimensions to avoid interference and collisions. This Clustered Contention and Contention Free Fully Decentralized MAC (C3F2-DMAC) protocol allows mobile stations managing the channel to efficiently establish a common time reference and maintain common state information regarding current allocation of channel resources in terms of duration and timing of each CFP and its assignment to a mobile station.