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In this paper, we study the stochastic optimization of cloud radio access networks (C-RANs) by joint remote radio head (RRH) activation and beamforming in the downlink. Unlike most previous works that only consider a static optimization framework with full traffic buffers, we formulate a dynamic optimization problem by explicitly considering the effects of random traffic arrivals and time-varying...
A time sharing relaying system model using Orthogonal Frequency Division Multiple Access (OFDMA) is investigated in this paper, where eNode B transmits to relay and macro user equipments (M-UEs) during the first time slot, and in the second time slot messages are conveyed to remote user equipments (R-UEs) by the relay with relay acting in the decode-and-forward (DF) mode. These two transmissions are...
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