Institute of Electrical & Electronic Engineers
Resource allocation in Orthogonal Frequency Division Multiple Access (OFDMA) Relay Cellular Networks (RCN) has been investigated. The authors introduce an Orthogonal Frequency-and-Time Transmission (OFTT) protocol, in which orthogonal frequency and time resources are allocated to different communication modes and phases, respectively, and propose a simple algorithm for resource allocation. Communication modes (one- and two-hop modes), sub-channels, and relay transmit power are sequentially allocated to enhance the power efficiency of the OFDMA RCN. They show an achievable quality-of-service tradeoff between one- and two-hop users.