Throughput Capacity of a Cognitive Radio Based Multi-hop Relay Network

다국어 초록 (Multilingual Abstract)

The purpose of enabling relay is to enhance coverage, range, and throughput and possibly capacity of a multi-hop relay network and to enable very low power devices to participate in the network. Since it is possible to have simultaneous transmission by both the base station (BS) and relay station (RS), throughput gains may also be achieved by either exploiting spectrum efficiency or spatial diversity. Cognitive radio (CR) is another promising technology that can improve the efficiency of spectrum usage by finding available spectrum in a crowded network, leading to gains in capacity. In cellular networks, integration of CR techniques with the multi-hop relays can enhance the performance significantly. In this paper, we investigate the throughput capacity of a multi-hop relay network with CR enabled RS. We develop the throughput capacity model for the proposed system based on utilization factor. The analytical results based on those equations show significant improvement in throughput capacity for CR enabled multi-hop relay system.