Sunday 31 August 2008

Wseas Transactions

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Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 27-230
Full Name: Jong-Shin Chen
Position: Assistant Professor
Age: ON
Sex: Male
Address: Department of Computer and Communication Engineering, Chaoyang University of Technology, Taichung 413, Taiwan, R.O.C.
Country: TAIWAN
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E-mail address: jschen26@cyut.edu.tw
Other E-mails: jschen@pluto.iecs.fcu.edu.tw
Title of the Paper: An Adaptive Bandwidth Management Strategy for Adaptive Antenna Array Wireless Networks
Authors as they appear in the Paper: Jong-Shin Chen, Neng-ChungWang, Yung-Fa Huang, Wen-Chi Chiang
Email addresses of all the authors: jschen26@cyut.edu.tw, ncwang@nuu.edu.tw, yfahuang@cyut.edu.tw, s95306104@cyut.edu.tw
Number of paper pages: 10
Abstract: Wireless networks that employ adaptive antenna array (AAA) have been proposed to increase the traffic-carrying capacity and circuit quality. The AAA architecture generates a large number of areas since a cell is divided into several areas. Therefore, a high-mobility mobile host has a very high probability to cross the area boundary and needs to perform a handoff procedure in order to continue the current communication session. A handoff procedure including code switch, data switch, and even network switch will increase the system overhead. Each area has a set of system codes. When a call arrives at an area, if no codes are available in this area to serve this call, the call will be blocked. Accordingly, the number of codes allocated to an area will affect the communication quality in this area and the allocations of system codes among areas will affect the traffic-carrying capacity of a cellular system. A reasonable allocation should provide more codes to each area!
with heavy traffic than with light traffic. Otherwise, it will experience that the heavy traffic areas do not have sufficient codes to carry their traffic loads but the light traffic areas have many available codes. Thus, the traffic-carrying capacity of a system is reduced and the call blocking probability arises. To consider real-life networks, the traffic distributions among areas should be changeable according to various conditions. In order to achieve higher code utilization, when there are variations in traffic, the code allocations among areas should be effectively reallocated according to current traffic profile. The investigation proposes an effective load balance and handoff management strategy. These strategies are implemented to solve traffic-adaptation problem that can enhance the traffic-carrying capacity for variations in traffic. For the management of handoff procedure, our strategy considers the mobility of mobile hosts and the bandwidth utilization. It ca!
n decrease the number of handoff procedures and lessen the system over
head. Furthermore, the performance analysis and the simulation results are presented to confirm the efficiency of the proposed strategy.
Keywords: Adaptive antenna array, wireless network, capacity, load balance, traffic-adaptation, and handoff procedure
EXTENSION of the file: .pdf
Special (Invited) Session: Adaptive Load Balance and Handoff Management Strategy for Adaptive Antenna Array Wireless Networks
Organizer of the Session: 591-439
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