Reliable Best-Relay Selection for Secondary Transmission in Co-operation Based Cognitive Radio Systems: A Multi-Criteria Approach

Authors:

J S Banerjee,A Chakraborty, A Chattopadhyay,

DOI NO:

https://doi.org/10.26782/jmcms.2018.06.00002

Keywords:

Best Relay selection,Relay node,Cognitive radio Systems,Decision making, Fuzzy logic,

Abstract

Selection of Relay for unlicensed transmission in cooperation based cognitive radio systems is an essential area of research which ensures the transmission performance of the secondary system & at the same time maintains the transmission behavior of the licensed network with respect to the quality-of-service (QoS).So far we have studied Signal-to-Interference-plus-Noise Ratio (SINR) of a relay node as the sole parameter to judge the BEST relay in the existing research works. This time we have proposed few other important parameters like Reliability and Relative Link Quality (RLQ) of a relay node as seen from the receiver, in order to select the Reliable BEST relay in a more accurate manner from the rest of the lot as the authors believe that for a faithful transmission, the selected best relay should be reliable along with other parameters. We have carried out ample simulation study to find out the reliable best relay applying our proposed fuzzy logic-based scheme. The implementation of the suggested system is verified with the earlier proposed schemes, i.e., fuzzy logic-based, SINR based and without relay have been studied holistically through the Secondary Outage Probability & Bit Error Rate (BER) simulation results. Keywords : Best Relay selection, Relay node, Cognitive radio Systems, Decision making, Fuzzy logic.

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Author(s): J S Banerjee, A Chakraborty, A Chattopadhyay View Download