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This paper studies privacy-preserving for downlink transmission in multiuser relay systems, where a source communicates with multiple users via a relay employing the amplify-and-forward (AF) protocol. At any scheduling unit, only one user (desired user) is selected to receive the source information, and the other users (undesired users) are viewed as potential eavesdroppers due to the broadcast nature...
Intercell interference severely degrades the performance of cell-edge users in cellular networks. To effectively manage the intercell interference, a heuristic scheme that jointly considers user scheduling and power control is proposed for multicell orthogonal frequency division multiple-access (OFDMA) networks with BS cooperation and limited backhaul capacity. First, a greedy user scheduling is proposed,...
In this paper, we provide a new resource management algorithm with delay constraints in cognitive OFDMA Systems. Our objective is to give priority to the high real-time cognitive user in the allocation of the channel in the first scheduling slot, maximize multiple cognitive users' weighted rate sum by jointly adjusting their frequency and power resource, under the constraints of multiple primary users'...
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