DocumentCode :
2905447
Title :
Distributed Relay Selection and Power Control in Cognitive Radio Networks with Cooperative Transmission
Author :
Luo, Changqing ; Yu, F. Richard ; Ji, Hong ; Leung, Victor C M
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fYear :
2010
fDate :
23-27 May 2010
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, we present a distributed relay selection and power allocation scheme concurrently considering the channel states of all related links and residual energy state of the relay nodes for cooperative transmission in cognitive radio (CR) networks. Specifically, we formulate the CR network with cooperative transmission as a restless bandit system, which has been widely applied in operations research and stochastic control. The channel state and residual energy state are presented by finite state Markov chains. With this stochastic optimization formulation, the optimal policy for relay selection and power allocation is indexable, meaning that the relay with the highest index should be selected. The proposed scheme can achieve the tradeoff between achievable rate and network lifetime. Simulation results are presented to illustrate the performance of the proposed scheme.
Keywords :
Markov processes; cognitive radio; optimisation; power control; stochastic systems; telecommunication congestion control; channel states; cognitive radio networks; cooperative transmission; distributed relay selection; finite state Markov chains; power allocation scheme; power control; residual energy state; stochastic control; stochastic optimization formulation; Chromium; Cognitive radio; Control systems; Energy states; Operations research; Power control; Power system relaying; Relays; Stochastic processes; Stochastic systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town
ISSN :
1550-3607
Print_ISBN :
978-1-4244-6402-9
Type :
conf
DOI :
10.1109/ICC.2010.5502231
Filename :
5502231
Link To Document :
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