Acta Metallurgica Sinica(English letters) ›› 2012, Vol. 19 ›› Issue (6): 25-28.doi: 10.1016/S1005-8885(11)60314-2

• Wireless • 上一篇    下一篇

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

翟兰杰,纪红,李曦,唐益文   

  1. 北京邮电大学
  • 收稿日期:2012-05-08 修回日期:2012-09-24 出版日期:2012-12-31 发布日期:2012-12-14
  • 通讯作者: 翟兰杰 E-mail:sandyzhai@bupt.edu.cn
  • 基金资助:

    This work was supported by the National Natural Science Funds of China for Young Scholar (61001115), the Beijing Natural Science Foundation of China (4102044), and the National Natural Science Foundation of China (61271182).

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

  • Received:2012-05-08 Revised:2012-09-24 Online:2012-12-31 Published:2012-12-14
  • Supported by:

    This work was supported by the National Natural Science Funds of China for Young Scholar (61001115), the Beijing Natural Science Foundation of China (4102044), and 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 fairness. 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 fairness 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

Abstract:

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 fairness. 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 fairness level while not reducing the throughput comparing with other existing algorithms.

Key words:

cooperative relaying, cognitive radio networks, relay selection and resource allocation, coalition graph game