Abstract:Cognitive radio is regarded as a key technique in the fifth generation communication system. We consider that the popular contents can be cached in cognitive mobile users who compose a cognitive Device-to-Device (D2D) network. Cached Contents in this network can be shared by cooperating with each other. Consequently, contents can be downloaded from local cache, cognitive D2D network or cellular network with different access cost. It has communication cost when accessing cellular networks, and time delay and co… Show more
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