Relay Based Asymmetric Communication Resource Allocation Scheme for Urban Operations

Relay based communication is essential for urban operations because two communication nodes far from each other are hard to connect due to the harsh wireless environment. A relay based asymmetric commuication resource allocation scheme for OFDM-Based relay system in downlink is proposede in this paper. Unlike previous work, the time slots for the two hops via each relay are designed to be asymmetric, which enhances the degree of freedom. Besides, destinations which connect directly to the source are considered, which is different from previous work. Simulation results demonstrate that the proposed scheme can successfully give the optimal results and when the distance between source and relay or the distance between relay and destination varies, the optimal solution changes.