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Dynamic Channel Allocation Considering the Interference Range in Multi-cell Downlink Systems  

Lee, Neung-Hyung (서울대학교 전기컴퓨터공학부)
Bahk, Sae-Woong (서울대학교 전기컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.2A, 2007 , pp. 179-187 More about this Journal
Abstract
As wireless networks evolve to orthogonal frequency division multiple access(OFDMA) systems, inter-cell interference control becomes a critical issue in radio resource management. The allocation of the same channels in neighbor cells cause inter-cell interference, so the channel allocation needs to be taken carefully to lower the inter-cell interference. In distributed channel allocation, each cell independently tries to allocate channels that suffer low interference level. In this paper, under the assumption of static users, we introduce the concept of interference range and use it in designing our two algorithms; basic and combined. The basic algorithm performs interference range detection and determines whether to use the considered channel, while the combined algorithm checks the channel quality in addition to detecting the interference range. The two algorithms dynamically perform channel allocation with low complexity and show good throughput and fairness performance.
Keywords
Channel Allocation; Ofdma; Interference Range;
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