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AuthorEl-Sherif A.A.
AuthorMohamed A.
Available date2022-04-21T08:58:34Z
Publication Date2014
Publication NameIEEE Transactions on Wireless Communications
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/TWC.2013.112513.122082
URIhttp://hdl.handle.net/10576/30158
AbstractThis paper studies the joint design of routing and resource allocation algorithms in cognitive radio based wireless mesh networks. The mesh nodes utilize cognitive overlay mode to share the spectrum with primary users. Prior to each transmission, mesh nodes sense the wireless medium to identify available spectrum resources. Depending on the primary user activities and traffic characteristics, the available spectrum resources will vary between mesh transmission attempts, posing a challenge that the routing and resource allocation algorithms have to deal with to guarantee timely delivery of the network traffic. To capture the channel availability dynamics, the system is analyzed from a queuing theory perspective, and the joint routing and resource allocation problem is formulated as a non-linear integer programming problem. The objective is to minimize the aggregate end-to-end delay of all the network flows. A distributed solution scheme is developed based on the Lagrangian dual problem. Numerical results demonstrate the convergence of the distributed solution procedure to the optimal solution, as well as the performance gains compared to other design methods. It is shown that the joint design scheme can accommodate double the traffic load, or achieve half the delay compared to the disjoint methods. 2014 IEEE.
Languageen
PublisherIEEE
SubjectChannel allocation
Delay minimization
Distributed resources
LaGrangian dual problem
Non-linear integer programming
Resource allocation algorithms
Resource allocation problem
Traffic characteristics
Algorithms
Cognitive radio
Integer programming
MESH networking
Queueing theory
Resource allocation
TitleJoint routing and resource allocation for delay minimization in cognitive radio based mesh networks
TypeArticle
Pagination186-197
Issue Number1
Volume Number13
dc.accessType Abstract Only


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