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This paper presents a distributed cross-layer optimization algorithm for a multihop cognitive radio network, with the objective of maximizing data rates for a set of user communication sessions. We study this problem with joint consideration of power control, scheduling, and routing. Even under a centralized approach, such a problem has a mixed-integer nonlinear program formulation and is likely NP-hard...
Some typical MAC protocols have been proposed for multi-hop CR network recently. In a multi-hop MAC protocol, a node uses the common control channel to perform channel negotiation before data transmission. Recent research findings indicate that insecure transmission of control channels open vulnerable holes for the Denial of Service attacks. This paper makes a security analysis for CR network MAC...
To meet the dynamic spectrum access of cognitive radio (CR), the selfish game-theoretic model is identified for multi-hop networking with CR nodes, which matches well with the physical administrative structure in real-life situations. This paper investigates user communication session via a cross-layer optimization approach, with joint consideration of power control, scheduling, and routing. Both...
Cognitive radio is a new technology which can sense the availability of local spare spectrum and be used to communicate with each other. In a multi-hop network consisted of cognitive radio nodes, the spectrum sharing for each cognitive radio node is very important. In real condition, as the number of users in different fixed regions is diverse, the dynamic spectrum sharing strategy should be dissimilar...
To investigate how to support user communication sessions in cognitive radio (CR), the radio technology should jointly perform power control, scheduling, and flow routing, which are generated by a multi-hop wireless network. With the adjustments of migrating nodes to neighboring nodes, a bandwidth footprint tree (BFT) is defined in this paper. Based on reducing hot spots approach, the distributed...
Cognitive radio networks is recognized as the technology to solve the problem of spectrum shortage and promote the efficient use of the spectrum. However, the research of CR networks technologies only stays in the theoretical stage recently. Therefore, developing a CR networks platform becomes an urgent problem to solve. Several CR platforms have being deployed by the research community. However,...
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