计算机技术与发展
計算機技術與髮展
계산궤기술여발전
COMPUTER TECHNOLOGY AND DEVELOPMENT
2014年
11期
5-8,12
,共5页
信道干扰%DNAF%扩展信标帧%NOFA-1%随机信道分配算法
信道榦擾%DNAF%擴展信標幀%NOFA-1%隨機信道分配算法
신도간우%DNAF%확전신표정%NOFA-1%수궤신도분배산법
channel interference%DNAF%extended beacon frames%NOFA-1%random channel assignment algorithm
在高密度AP部署的网络环境中,由于ISM频带只有1、6和11三个正交信道,因此AP的工作信道不可避免的存在重叠,其重叠信道干扰对吞吐量有较大的影响。文中从基于AP上线时为其分配信道的角度出发,提出了一种集中式自适应信道分配算法DNAF( Densest Nearest Assignment First)。在大量AP刚上线时,通过周期性广播扩展信标帧,建立动态的网络拓扑结构图,并通过AC为其进行优化信道分配。通过对信道分配算法的大量实验及仿真,结果表明,在高密度且AP邻居分布不均匀的网络环境下,与启发式算法NOFA-1及随机信道分配算法相比,该算法能有效地减小邻居间干扰,从而达到提高网络吞吐量的目的。
在高密度AP部署的網絡環境中,由于ISM頻帶隻有1、6和11三箇正交信道,因此AP的工作信道不可避免的存在重疊,其重疊信道榦擾對吞吐量有較大的影響。文中從基于AP上線時為其分配信道的角度齣髮,提齣瞭一種集中式自適應信道分配算法DNAF( Densest Nearest Assignment First)。在大量AP剛上線時,通過週期性廣播擴展信標幀,建立動態的網絡拓撲結構圖,併通過AC為其進行優化信道分配。通過對信道分配算法的大量實驗及倣真,結果錶明,在高密度且AP鄰居分佈不均勻的網絡環境下,與啟髮式算法NOFA-1及隨機信道分配算法相比,該算法能有效地減小鄰居間榦擾,從而達到提高網絡吞吐量的目的。
재고밀도AP부서적망락배경중,유우ISM빈대지유1、6화11삼개정교신도,인차AP적공작신도불가피면적존재중첩,기중첩신도간우대탄토량유교대적영향。문중종기우AP상선시위기분배신도적각도출발,제출료일충집중식자괄응신도분배산법DNAF( Densest Nearest Assignment First)。재대량AP강상선시,통과주기성엄파확전신표정,건립동태적망락탁복결구도,병통과AC위기진행우화신도분배。통과대신도분배산법적대량실험급방진,결과표명,재고밀도차AP린거분포불균균적망락배경하,여계발식산법NOFA-1급수궤신도분배산법상비,해산법능유효지감소린거간간우,종이체도제고망락탄토량적목적。
Under the high density of AP deployment,there is only three orthogonal channels 1,6,and 11 in the ISM band,so the channel of AP inevitably overlaps with each other and the overlapping interference has a larger effect on the throughput. Based on the AP online, propose a centralized adaptive channel allocation algorithm DNAF. At first,AP establishes a dynamic network topology structure through broadcasting extended beacon frames periodically,and then AC assigns channels for APs through the improved channel allocation algo-rithm. The results show that the proposed algorithm compared with heuristic algorithm NOFA-1 and random channel assignment algo-rithm can effectively reduce the interference between neighbors under the network environment of high density and uneven distribution of APs,thus it can improve the throughput of network better.