On the optimal, fair and channel-aware cognitive radio network reconfiguration

Arkoulis, S; Anifantis, E.; Karyotis, V.; Papavassiliou, S.; Mitrou, N.

dc.contributor.author	Arkoulis, S	en
dc.contributor.author	Anifantis, E.	en
dc.contributor.author	Karyotis, V.	en
dc.contributor.author	Papavassiliou, S.	en
dc.contributor.author	Mitrou, N.	en
dc.date.accessioned	2014-03-01T02:14:56Z
dc.date.available	2014-03-01T02:14:56Z
dc.date.issued	2013	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30182
dc.subject	Joint Channel Assignment and Routing problem	en
dc.subject	Network reconfiguration	en
dc.subject	Cognitive Radio Networks	en
dc.subject	Channel switching	en
dc.subject	Fairness	en
dc.subject	MILP	en
dc.title	On the optimal, fair and channel-aware cognitive radio network reconfiguration	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.comnet.2013.03.004	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.comnet.2013.03.004	en
heal.publicationDate	2013	en
heal.abstract	In this work, we focus on the Joint Channel Assignment and Routing (JCAR) problem in Cognitive Radio Networks (CRNs) and especially on the optimal reconfiguration of secondary networks under the presence of primary users. Secondary CRN users need to adapt their transmission channels promptly, while effectively limit additional or escalating system modifications triggered by the intertweaved primary user activity. Our approach takes into consideration the underlying spectrum switching dynamics and concurrently aims at a fair resource allocation among the active network flows. We take an optimization perspective and formulate the JCAR and network reconfiguration problems as mixed integer linear programs, addressing fairness concerns as well. We propose a heuristic approach which is based on a sequential reduced search space methodology, in order to obtain efficiently solutions of otherwise tough and demanding reconfiguration problems. The operation, effectiveness and performance of the proposed mechanisms are evaluated through analysis and simulations under various working conditions. The obtained numerical results indicate the benefits of the proposed schemes in terms of overhead performance and their scaling properties with respect to more realistic and thus demanding topologies.	en
heal.publisher	Elsevier	en
heal.journalName	Computer Networks	en
dc.identifier.doi	10.1016/j.comnet.2013.03.004	en
dc.identifier.volume	57	en
dc.identifier.issue	8	en
dc.identifier.spage	1739	en
dc.identifier.epage	1757	en