Abstract:

In Ad hoc networks, the low priority flows have significant influence on high priority flows because the cooperative mechanism does not exist in medium access control (MAC) layer. To resolve the problem, a new MAC protocol based on fuzzy logic is proposed. It can protect the high priority flows maintain high end-to-end throughput and low delay under heavy background loads, through cooperating relative flows using fuzzy logic mechanism in MAC layer. The new protocol can better protect the end-to-end delay and throughput of high priority data flows when the networks’ background load is over 20% in simulation.

Key words: 802.11e protocol, Ad hoc, medium access control protocol, fuzzy logic