Research Article
Downlink Performance Analysis of Cognitive Radio based Cellular Relay Networks
@INPROCEEDINGS{10.1109/CROWNCOM.2008.4562491, author={Seungmo Kim and Wan Choi and Yonghoon Choi and Jongmin Lee and Youngnam Han and Insun Lee}, title={Downlink Performance Analysis of Cognitive Radio based Cellular Relay Networks}, proceedings={3rd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={7}, keywords={Relay downlink cognitive radio capacity}, doi={10.1109/CROWNCOM.2008.4562491} }- Seungmo Kim
Wan Choi
Yonghoon Choi
Jongmin Lee
Youngnam Han
Insun Lee
Year: 2008
Downlink Performance Analysis of Cognitive Radio based Cellular Relay Networks
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2008.4562491
Abstract
In this paper, we propose two operating scenarios of employing cognitive radio to downlink of relay networks. The first scenario uses ISM band while the second scenario exploits opportunity of channel use at UHF spectrum. The capacity gain over conventional relay is investigated in terms of the normalized system capacity. We first statistically model the spectrum usage pattern in those bands and derive the achievable data rate and outage probability in order to analyze performance gain in the view of practical system establishment. Then, we define system capacity by normalizing the effect of bandwidth so that a fair comparison of performance is accomplished. Through our analysis and simulations, it is shown that the proposed scenarios are able to achieve significant gains over a conventional cellular relay system in terms of the normalized system capacity. As a result, relay combined with cognitive radio can be considered as a viable solution to get higher downlink capacity.