ChannelMAC Protocol for Opportunistic Communication in Ad Hoc Wireless Networks
Source: University of South Australia
Despite significant research effort, the performance of distributed medium access control methods has failed to meet theoretical expectations. This paper proposes a protocol named "Channel MAC" performing a fully distributed medium access control based on opportunistic communication principles. In this protocol, nodes access the channel when the channel quality increases beyond a threshold, while neighbouring nodes are deemed to be silent. Once a node starts transmitting, it will keep transmitting until the channel becomes "Bad." The authors derive an analytical throughput limit for Channel MAC in a shared multiple access environment. Furthermore, three performance metrics of Channel MAC - throughput, fairness, and delay - are analyzed in single hop and multi-hop scenarios using NS2 simulations.