On multi-channel MAC protocols in Cognitive Radio Networks

Yau, K.-L., Komisarczuk, Peter and Teal, P. D. (2008) On multi-channel MAC protocols in Cognitive Radio Networks. In: The Australasian Telecommunication Networks and Applications Conference, 07-10 December 2008, Adelaide, Australia.

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Cognitive Radio (CR) exploits underutilized
licensed spectrums to improve its bandwidth availability. Using
CR technology, a node is able to adapt its transmission and
reception radio parameters including channel frequency
dynamically according to local spectrum availability. For
channel access between wireless nodes, a cognitive Medium
Access Control (MAC) protocol is necessary to coordinate the
CRs. Multi-channel MAC protocol extensions have been
proposed in IEEE802.11 to enable a node to operate in multiple
channels in order to improve network-wide throughput. These
multi-channel MAC protocols have several functions that can
be leveraged by cognitive MAC protocols due to their
similarities in certain aspects, though the CR has an additional
requirement to cope with the existence of licensed users that
have higher authority over the channels. Current research in
cognitive MAC protocols assumes the availability of a common
control channel at all times, which is an approach in the multichannel
MAC protocols. This approach has certain hardware
requirements that may not be readily available at CR nodes.
Hence, other approached may be necessary. In this paper,
various types of multi-channel MAC protocols are reviewed,
followed by discussion of their merits and demerits in multichannel
environments. The purpose is to show the additional
functionalities and challenges that each multi-channel MAC
protocol has to offer and address in order to operate in
multihop CR networks. By providing discussion on possible
technology leverage from multi-channel to cognitive MAC
protocols, we aim to establish a foundation for further research
and discussion.

Item Type: Conference or Workshop Item (Paper)
Subjects: Computing
Depositing User: Vani Aul
Date Deposited: 21 Mar 2014 14:43
Last Modified: 11 Dec 2015 11:11
URI: http://repository.uwl.ac.uk/id/eprint/798

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