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http://dx.doi.org/10.7737/KMSR.2012.29.2.065

An Heuristic for Joint Assignments of Power and Subcarriers in Cognitive Radio Networks  

Paik, Chun-Hyun (동의대학교 산업경영공학과)
Publication Information
Korean Management Science Review / v.29, no.2, 2012 , pp. 65-77 More about this Journal
Abstract
With the explosivley increasing demand in wireless telecommunication service, the shortage of radio spectrum has been worsen. The traditional approach of the current fixed spectrum allocation leads to spectrum underutilization. Recently, CR (Cognitive Radio) technologies are proposed to enhance the spectrum utilization by allocating dynamically radio resources to CR Networks. In this study, we consider a radio resource(power, subcarrier) allocation problem for OFDMA-based CRN in which a base station supports a variety of CUs (CRN Users) while avoiding the radio interference to PRN (Primary Radio Network). The problem is mathematically formulated as a general 0-1 IP problem. The optimal solution method for the IP problem requires an unrealistic execution time due to its complexity. Therefore, we propose an heuristic that gives an approximate solution within a reasonable execution time.
Keywords
Cognitive Radio Network; OFDMA System; Radio Resource Assignment; Heuristic;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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