| 摘 要: 随着当前WLAN设备和用户爆发式增长，许多公共场所都大量部署WLAN以满足人们的无线通信需求。 面对当前WLAN密集部署的现状，用户该如何根据自己的需求选择最优的WLAN接入，是影响到用户通信体验和资 源合理利用的重要问题。针对不同业务用户对网络性能的需求和偏好，设计了一种基于用户需求的WLAN接入选择方 法。该方法首先通过用户移动速度区分用户类型，禁止高速移动用户接入WLAN，以避免不必要的切换；然后基于用 户业务对信号强度、带宽、时延、抖动、丢包率等WLAN网络属性的需求，利用层次分析法求出各属性的权重，并以 此为基础设计了多属性决策机制，以找出最优AP接入。OPNET网络仿真验证表明，该接入方法减少了不必要的切换， 降低了切换失败概率，提高了网络性能。 |
| 关键词: 无线局域网；接入选择；用户需求；层次分析法；逼近理想解排序法 |
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中图分类号: TP393
文献标识码: A
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| A WLAN Access Selection Method Based on User Requirements |
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ZHAO Zhangming,XIA Shenning,GUO Changsui1,2
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1.( 1.Troops 91937, Ningbo 316000, China;2.
2.Troops 31010, Beijing 100044, China)
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| Abstract: With the current explosive growth of WLAN devices and users,a large number of WLAN Access Points (APs) are deployed in some public places to meet people's wireless communication needs.In the situation of dense distribution of WLAN APs,how to select and access an optimal AP is an important issue affecting users' communication experience and rational utilization of network resources.Based on analyzing the requirements and preferences of different user business for network attributes,an initial WLAN access selection method is designed.In this method,users are firstly classified according to their moving speed and the high-speed users are not allowed to access WLAN in order to avoid unnecessary handoff.Using the Analytic Hierarchy Process (AHP),the weights of network attributes are then obtained based on the requirements and preferences of different users.At last,a multi-attribute decision mechanism for optimal access selection is designed.According to the OPNET simulation experiment,this method is able to reduce unnecessary handoff,decrease the probability of handoff failure and improve the network performance. |
| Keywords: WLAN;access selection;user requirements;AHP;TOPSIS |
