Tran Minh Trung

Ph.D., Hanoi University of Science and Technology – School of Electronics and Communications

WiFlex: Multi-Channel Cooperative MAC protocol for Heterogeneous Wireless Devices

Posted by trungtm on June 16, 2007

Incompatible wireless protocols in the ISM band are proliferating, creating increasingly complex co-existence problems. This paper proposes a family of compatible protocols that address the requirements of a wide range of devices, from small sensor nodes to media centers. The family is based on an OFDM physical layer and on a distributed multi-channel asynchronous MAC protocol that supports priorities and radios that can modulate different amounts of bandwidth. The MAC protocol is shown to be collision-free. The performance of the protocols is evaluated using a multichannel extension of NS-2 that also models capture effects. The evaluation results demonstrate the high performance of theprotocols and the coexistence of devices with different characteristics and of applications with different requirements.

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