Distributed power and rate control for cognitive radio networks

Author

Wang, Wei ; Wang, Wenbo ; Zhu, Yajun ; Peng, Tao

Author_Institution

Wireless Signal Processing and Networking Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, P. R. China

Volume

11

Issue

2

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

166

Lastpage

174

Abstract

In this paper, a distributed power and end-to-end rate control algorithm is proposed in the presence of licensed users. By Lagrangian duality theory, the optimal power and rate control solution is given for the unlicensed users while satisfying the interference temperature limits to licensed users. It is obtained that transmitting with either 0 or the maximum node power is the optimal scheme. The synchronous and asynchronous distributed algorithms are proposed to be implemented at the nodes and links. The convergence of the proposed algorithms are proved. Finally, further discussion on the utility-based fairness is provided for the proposed algorithms. Numerical results show that the proposed algorithm can limit the interference to licensed user under a predefined threshold.

Keywords

Cognitive radio; Lagrangian duality; fairness; power control; rate control; wireless communication;

fLanguage

English

Journal_Title

Communications and Networks, Journal of

Publisher

ieee

ISSN

1229-2370

Type

jour

DOI

10.1109/JCN.2009.6391391

Filename

6391391