WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 14, 2015
Load-Aware Spectrum Allocation Based on Interference Graph Adapting to Radio Characteristics
Authors: , ,
Abstract: Nowadays, load-driven spectrum allocation in wireless networks is becoming more important since the surging mobile traffic are usually distributed quite uneven. Related approaches have been proposed to assign channels of different widths for APs in WLAN. But a challenge usually being ignored is that radio characteristics will affect the interference graph which is a key basis in the allocation process. In this paper, we explain influences of radio features on interference graph and give a simple method to estimate the more accurate interference graph accordingly. In addition, a load-aware spectrum allocation mechanism for APs is proposed. The mechanism firstly decides widths of channels required by APs and estimates the more accurate interference graph based on several characteristics like channel-width, central frequency. Then it arranges spectrum blocks for APs based on the new interference graph. Simulations and analysis show that spectrum allocation method using wrong interference graph will generate great spectrum overlaps between interfering APs, about 1350MHz. And our mechanism could improve spectrum utilization efficiency by nearly two times while generating only few overlaps, about 250MHz.
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Pages: 54-61
WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 14, 2015, Art. #8