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Networking cognitive radios and nodes from Primary System (PS) results in a heterogeneous coexisting multi-radio wireless network, so that significant network throughput gain can be achieved. However, by investigating Cognitive Radio Network (CRN) architecture, the links in CRNs are unlikely to support complete security check due to link dynamics, opportunistic availability, and uni-directional in available time window. The authors, therefore, introduce Trusted Cognitive Radio Networking (TCRN) concept to facilitate network functions such as association in dynamic spectrum access and routing. First of all, they explore the mathematical framework for trust in CRNs. They, then show successful association of node to CRN based on the mathematical structure of trust from statistical decision theory.
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