Optimal resource allocation scheme for cognitive radio networks with relay selection based on game theory  

作　　者：ZHAI Lan-jie JI Hong LI Xi TANG Yi-wen 

机构地区：[1]School of Information and Communication Engineering,Beijing University of Posts and Telecommunications

出　　处：《The Journal of China Universities of Posts and Telecommunications》2012年第6期25-28,62,共5页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Funds of China for Young Scholar(61001115);the Beijing Natural Science Foundation of China(4102044);the National Natural Science Foundation of China(61271182)

摘　　要：In this paper, we present a non-transferable utility coalition graph game （NTU-CGG） based resource allocation scheme with relay selection for a downlink orthogonal frequency division multiplexing （OFDMA） based cognitive radio networks to maximize both system throughput and system faimess. In this algorithm, with the assistance of others SUs, SUs with less available channels to improve their throughput and fairness by forming a directed tree graph according to spectrum availability and traffic demands of SUs. So this scheme can effectively exploit both space and frequency diversity of the system. Performance results show that, NTU-CGG significantly improves system faimess level while not reducing the throughput comparing with other existing algorithms.In this paper, we present a non-transferable utility coalition graph game （NTU-CGG） based resource allocation scheme with relay selection for a downlink orthogonal frequency division multiplexing （OFDMA） based cognitive radio networks to maximize both system throughput and system faimess. In this algorithm, with the assistance of others SUs, SUs with less available channels to improve their throughput and fairness by forming a directed tree graph according to spectrum availability and traffic demands of SUs. So this scheme can effectively exploit both space and frequency diversity of the system. Performance results show that, NTU-CGG significantly improves system faimess level while not reducing the throughput comparing with other existing algorithms.

关 键 词：cooperative relaying cognitive radio networks relay selection and resource allocation coalition graph game 

分 类 号：TN925[电子电信—通信与信息系统]