| WLAN与蜂窝混合网络有效的信道切换策略 |
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| 引用本文： | 刘鑑澄. WLAN与蜂窝混合网络有效的信道切换策略[J]. 计算机应用与软件, 2009, 26(6): 218-223 |
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| 作者姓名： | 刘鑑澄 |
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| 作者单位： | 韶关学院计算机系,广东,韶关512005 |
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| 摘 要： | 针对无线局域网WLAN(Wireless Local Area Network)与蜂窝混合网络,提出一种具有抢占蜂窝网络信道的切换策略。当使用蜂窝信道的终端移入WLAN覆盖区域时,只有在该终端所使用的信道被抢占时,该机制才进行垂直切换以减少因切换造成的时延与丢包;建立了该切换策略的三维马尔可夫模型,分析了WLAN网络的终端数、蜂窝信道的利用率、信道接入请求阻塞率、信道抢占率与信道被抢占率的性能。详细的仿真结果证明了提出的模型的有效性,当WLAN覆盖面积比例为0.2时,信道抢占概率最大;当终端移动速度达到100km/h时,信道被抢占的概率是移动速度为20km/h的3倍;提出的信道切换策略与随机切换策略相比,显著地降低了业务的丢包率与传输时延。
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| 关 键 词： | 无线局域网 蜂窝网络 信道切换 |
EFFICIENT CHANNEL HANDOFF SCHEME BETWEEN WLAN AND CELLULAR HYBRID NETWORKS |
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| Liu Jiancheng. EFFICIENT CHANNEL HANDOFF SCHEME BETWEEN WLAN AND CELLULAR HYBRID NETWORKS[J]. Computer Applications and Software, 2009, 26(6): 218-223 |
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| Authors: | Liu Jiancheng |
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| Affiliation: | Department of Computer;Shaoguan University;Shaoguan 512005;Guangdong;China |
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| Abstract: | For wireless local area network(WLAN) and cellular hybrid networks,a handoff scheme with preempting cellular channel is proposed.When a node using cellular channel moves into the area covered by WLAN,the proposed handoff scheme performs vertical handoff to decrease delay and packet loss ratio only when the channel the node used is preempted.A three-dimension Markov Chain model is build for the proposed scheme to analyse the number of nodes in WLAN,utility of cellular channel,blocking probability of channel ... |
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| Keywords: | Wireless local area networks Cellular networks Channel handoff |
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