Decentralised Learning MACs for Collision-free Access in WLANs

Details Decentralised Learning MACs for Collision-free Access in WLANs Decentralised Learning MACs for Collision-free Access in WLANs

2010-09-22

arxiv.org/abs/1009.4386v2

Computer Science

Networking and Internet Architecture

Scientific paper

By combining the features of CSMA and TDMA, fully decentralised WLAN MAC schemes have recently been proposed that converge to collision-free schedules. In this paper we describe a MAC with optimal long-run throughput that is almost decentralised. We then design two \changed{schemes} that are practically realisable, decentralised approximations of this optimal scheme and operate with different amounts of sensing information. We achieve this by (1) introducing learning algorithms that can substantially speed up convergence to collision free operation; (2) developing a decentralised schedule length adaptation scheme that provides long-run fair (uniform) access to the medium while maintaining collision-free access for arbitrary numbers of stations.

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