应用科技
應用科技
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YING YONG KE JI
2015年
2期
24-28
,共5页
认知无线Mesh网络%频谱优化%改进入侵杂草优化算法%调和指数优化%收敛速度
認知無線Mesh網絡%頻譜優化%改進入侵雜草優化算法%調和指數優化%收斂速度
인지무선Mesh망락%빈보우화%개진입침잡초우화산법%조화지수우화%수렴속도
cognitive wireless Mesh network%spectrum optimization%improved invasive weed optimization algo-rithm%optimization of harmonic index%convergence rate
随着网络资源日益紧张,认知无线Mesh网络中的频谱优化分配问题的研究主要集中在总带宽的最大化和占用频谱数的最小化。文中考虑到杂草算法的多样性以及容易实现和编码快捷等特点,提出一种基于改进入侵杂草优化算法( IWO)的频谱优化分配方法( IIOW)。通过对扩散条件中调和指数的优化,使得扩散更加均匀准确,大大加快收敛速度,同时优化了适应度函数的曲线。仿真结果表明:基于改进IWO的优化算法能在最大化总带宽与最小化信道占用数的情况下,获得较为理想的适应度函数曲线,同时加快收敛速度。
隨著網絡資源日益緊張,認知無線Mesh網絡中的頻譜優化分配問題的研究主要集中在總帶寬的最大化和佔用頻譜數的最小化。文中攷慮到雜草算法的多樣性以及容易實現和編碼快捷等特點,提齣一種基于改進入侵雜草優化算法( IWO)的頻譜優化分配方法( IIOW)。通過對擴散條件中調和指數的優化,使得擴散更加均勻準確,大大加快收斂速度,同時優化瞭適應度函數的麯線。倣真結果錶明:基于改進IWO的優化算法能在最大化總帶寬與最小化信道佔用數的情況下,穫得較為理想的適應度函數麯線,同時加快收斂速度。
수착망락자원일익긴장,인지무선Mesh망락중적빈보우화분배문제적연구주요집중재총대관적최대화화점용빈보수적최소화。문중고필도잡초산법적다양성이급용역실현화편마쾌첩등특점,제출일충기우개진입침잡초우화산법( IWO)적빈보우화분배방법( IIOW)。통과대확산조건중조화지수적우화,사득확산경가균균준학,대대가쾌수렴속도,동시우화료괄응도함수적곡선。방진결과표명:기우개진IWO적우화산법능재최대화총대관여최소화신도점용수적정황하,획득교위이상적괄응도함수곡선,동시가쾌수렴속도。
As resources of networks become increasingly tight , the research on the spectrum allocation optimization of cognitive wireless mesh networks focuses on maximization of the total bandwidth and minimized number of spec -trum occupation .This paper proposed an improved algorithm for spectrum allocation based on invasive weed optimi-zation ( IWO) after considering such characters as the diversity of the weed algorithm , easy realization and fast cod-ing.By optimizing the harmonic index in diffusion conditions , the diffusion becomes more even and accurate , the convergence speed becomes faster; in addition , the curve of the fitness function is optimized .Simulation results show that the optimization algorithm based on improved IWO can realize ideal fitness function and speed up conver -gence speed under the conditions of maximizing the total bandwidth and minimizing the number of occupied chan -nels.