Throughput Optimal Opportunistic Channel Switching in Cognitive Radio Networks

In this letter, we consider a problem of throughput optimum channel switching for channel access by a secondary user in multichannel Cognitive Radio Networks in which there is a delay involved in switching from one channel to another. We consider an imperfect sensing model that takes into account fa...

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Bibliographic Details
Published in:IEEE wireless communications letters 2021-09, Vol.10 (9), p.2046-2050
Main Authors: Santhoshkumar, M., Muttath, Dony J., Premkumar, K.
Format: Article
Language:English
Subjects:
Algorithms
Average cost MDP
Cognitive radio
cognitive radio networks
Delays
False alarms
Markov processes
Optimization
POMDP
Radio frequency
Radio networks
reconfiguration delay
Sensors
Switches
Switching
switching cost
Throughput
Wideband
wideband sensing
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Summary:In this letter, we consider a problem of throughput optimum channel switching for channel access by a secondary user in multichannel Cognitive Radio Networks in which there is a delay involved in switching from one channel to another. We consider an imperfect sensing model that takes into account false alarm and detection probabilities. We show that the problem can be posed in the framework of Partially Observable Markov Decision Process (POMDP), and obtain an average throughput optimal policy for which we provide structural results. Also, we propose a low complex algorithm ASTUTE for channel access based on one stage reward. We compare the performance of the optimum policy with ASTUTE . Our results show that the average throughput performance of ASTUTE is very close to that of the optimal solution.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2021.3091635