Korean Management Science Review (경영과학)

The Korean Operations Research and Management Science Society (한국경영과학회)
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An Heuristic for Joint Assignments of Power and Subcarriers in Cognitive Radio Networks

인지라디오 네트워크에서 전력과 부반송파 할당을 위한 휴리스틱

  • 백천현 (동의대학교 산업경영공학과)
  • Received : 2012.01.10
  • Accepted : 2012.06.01
  • Published : 2012.07.31
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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.

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References

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