Performance Analysis of Cellular-Based Two-Hop Relay Systems

Deployment of relay stations (RSs) has been proposed to support both high data rates and quality of service (QoS) for 4G wireless communication system. It is expected that the relay systems enhance system throughput and extend service coverage. In this paper, the capacity of a cellular-based two-hop relay system is evaluated in terms of transmit power ratio between base station (BS) and RS, cell radius, and resource utilization values of backhaul links. The cellular-based relay system has an advantage in system throughput as the cell radius increases. Furthermore, the cellular-based relay system can increase the system throughput through spatial resource reuse and reduction of radio resource utilization values of backhaul links.