Dynamic Target Wireless Network Selection Technique Using Fuzzy Linguistic Variables  

基于模糊语言变量的动态目标无线网络选择技术(英文)

作　　者：Faisal Kaleem Abolfazl Mehbodniya Arif Islam Kang K.Yen Fumiyuki Adachi 

机构地区：[1]Florida International University [2]Tohoku University

出　　处：《China Communications》2013年第1期1-16,共16页中国通信（英文版）

摘　　要：Even though various wireless Net- work Access Technologies （NATs） with dif- ferent specifications and applications have been developed in the recent years, no single wireless technology alone can satisfy the any- time, anywhere, and any service wire- less-access needs of mobile users. A real seamless wireless mobile environment is only realized by considering vertical and horizontal handoffs together. One of the major design issues in heterogeneous wireless networks is the support of Vertical Handoff （VHO）. VHO occurs when a multi-interface enabled mobile terminal changes its Point of Attachment （PoA） from one type of wireless access technology to another, while maintaining an active session. In this paper we present a novel multi-criteria VHO algorithm, which chooses the target NAT based on several factors such as user preferences, system parameters, and traf- tic-types with varying Quality of Service （QoS） requirements. Two modules i.e., VHO Neces- sity Estimation （VHONE） module and target NAT selection module, are designed. Both modules utilize several ＂weighted＂ users＇ and system＇s parameters. To improve the robust- ness of the proposed algorithm, the weighting system is designed based on the concept of fuzzy linguistic variables.Even though various wireless Network Access Technologies(NATs)with different specifications and applications have been developed in the recent years,no single wireless technology alone can satisfy the anytime,anywhere,and any service wireless-access needs of mobile users.A real seamless wireless mobile environment is only realized by considering vertical and horizontal handoffs together.One of the major design issues in heterogeneous wireless networks is the support of Vertical Handoff(VHO).VHO occurs when a multi-interface enabled mobile terminal changes its Point of Attachment(PoA)from one type of wireless access technology to another,while maintaining an active session.In this paper we present a novel multi-criteria VHO algorithm,which chooses the target NAT based on several factors such as user preferences,system parameters,and traffic-types with varying Quality of Service(QoS)requirements.Two modules i.e.,VHO Necessity Estimation(VHONE)module and target NAT selection module,are designed.Both modules utilize several"weighted"users’and system’s parameters.To improve the robustness of the proposed algorithm,the weighting system is designed based on the concept of fuzzy linguistic variables.

关 键 词：network access selection VHO heterogeneous networks WLAN WMAN WWAN Techniques for Order Preference bySimilarity to Ideal Solution 

分 类 号：TN925.93[电子电信—通信与信息系统] TU746[电子电信—信息与通信工程]