DocumentCode :
52970
Title :
Optimal transmission behaviour policies of secondary users in proactive-optimization cognitive radio networks
Author :
Si Pengbo ; Yu, F. Richard ; Wang Huiqi ; Zhang Yanhua
Author_Institution :
Coll. of Electron. Inf. & Control Eng., Beijing Univ. of Technol., Beijing, China
Volume :
10
Issue :
8
fYear :
2013
fDate :
Aug. 2013
Firstpage :
1
Lastpage :
17
Abstract :
In Cognitive Radio (CR) networks, there is a common assumption that secondary devices always obey commands and are under full control. However, this assumption may become unrealistic for future CR networks with more intelligent, sophisticated and autonomous devices. Imperfect spectrum sensing and illegal behaviour of secondary users can result in harmful interference to primary users. In this paper, we propose a novel concept of Proactive-Optimization CR (POCR) networks, in which highly intelligent secondary users always try to proactively consider potentially harmful interference when making their behaviour decision. Furthermore, we propose an optimal transmission behaviour decision scheme for secondary users in POCR networks considering the possible harmful interference and penalties from primary users. Specifically, we formulate the system as a Partially-Observable Markov Decision Process (POMDP) problem. With this formulation, a low-complexity dynamic programming framework is presented to obtain the optimal behaviour policy. Extensive simulation results are presented to illustrate the significant performance improvement of the proposed scheme compared with the existing one that ignores the proactive-optimization of secondary users.
Keywords :
Markov processes; cognitive radio; optimisation; radio networks; radio spectrum management; radiofrequency interference; signal detection; POCR networks; POMDP problem; autonomous devices; cognitive radio networks; complexity dynamic programming; decision scheme; harmful interference; illegal behaviour; imperfect spectrum sensing; intelligent devices; optimal transmission behaviour policy; partially-observable Markov decision process problem; primary users; proactive-optimization; secondary devices; secondary users; sophisticated devices; Cognitive radio; Interference; Markov processes; Resource management; Sensors; Wireless sensor networks; CR; POMDP; proactive-optimization; user behaviour;
fLanguage :
English
Journal_Title :
Communications, China
Publisher :
ieee
ISSN :
1673-5447
Type :
jour
DOI :
10.1109/CC.2013.6633740
Filename :
6633740
Link To Document :
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