Abstract:This paper addresses the cross-layer design of multiuser opportunistic spectrum access (OSA) in cognitive radio networks under the framework of grouped cooperative sensing. We attempt to reveal the mutually conflict nature in the following two processes: a) multi-user collaboration during cooperative sensing in PHY layer; b) the contention emerged during competitive medium access in MAC layer. Specifically, higher reliability of cooperative sensing requires more engaged cognitive users (CUs), which, in turn, m… Show more
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