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http://dx.doi.org/10.7236/JIWIT.2012.12.3.1

Fuzzy-based Dynamic Packet Scheduling Algorithm for Multimedia Cognitive Radios  

Tung, Nguyen Thanh (School of Electrical Engineering, University of Ulsan)
Koo, In-Soo (School of Electrical Engineering, University of Ulsan)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.12, no.3, 2012 , pp. 1-7 More about this Journal
Abstract
Cognitive radio, a new paradigm for wireless communication, is being recently expected to support various types of multimedia traffics. To guarantee Quality of Service (QoS) from SUs, a static packet priority policy can be considered. However, this approach can easily satisfy Quality of Service of high priority application while that of lower priority applications is being degraded. In the paper, we propose a fuzzy-based dynamic packet scheduling algorithm to support multimedia traffics in which the dynamic packet scheduler modifies priorities of packets according to Fuzzy-rules with the information of priority and delay deadline of each packet, and determines which packet would be transmitted through the channel of the primary user in the next time slot in order to reduce packet loss rate. Our simulation result shows that packet loss rate can be improved through the proposed scheme when overall traffic load is not heavy.
Keywords
Cognitive radio network; packet scheduling; Quality of Service(QoS); packet loss; delay deadline;
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