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We investigate the effect of medium-access control (MAC) used in information retrieval by a mobile access point (AP) on information processing in large-scale sensor network, where sensors are unreliable and subject to outage. We focus on a 1-D sensor network and assume that the location information is available locally at each sensor and unavailable to the AP. For a fixed collection interval, two...
We address the design of cognitive MAC protocols for opportunistic spectrum access in the presence of sensing error. Decentralized protocols are presented for ad hoc networks where there is no central coordinator or dedicated communication/control channel. Secondary users search for and access spectrum opportunities independently without exchanging local information on spectrum availability. We assume...
We consider the problem of opportunistic dynamic spectrum access (DSA) in an ad hoc network in which unlicensed secondary users communicate through channels not used by the primary users. Decentralized cognitive medium access control protocols are presented that allow secondary users to recognize spectrum opportunity and transmit based on a partial observation of the instantaneous spectrum availability...
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