DocumentCode :
1088713
Title :
Optimal Relay Station Placement in Broadband Wireless Access Networks
Author :
Bin Lin ; Pin-Han Ho ; Liang-Liang Xie ; Xuemin Shen ; Tapolcai, J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
Volume :
9
Issue :
2
fYear :
2010
Firstpage :
259
Lastpage :
269
Abstract :
To satisfy the stringent requirement of capacity enhancement in wireless networks, cooperative relaying is envisioned as one of the most effective solutions. In this paper, we study the capacity enhancement problem by way of relay stations (RSs) placement to achieve an efficient and scalable design in broadband wireless access networks. To fully exploit the performance benefits of cooperative relaying, we develop an optimization framework to maximize the capacity as well as to meet the minimal traffic demand by each subscriber station (SS). In specific, the problem of joint RS placement and bandwidth allocation is formulated into a mixed-integer nonlinear program. We reformulate it into an integer linear program which is solvable by CPLEX. To avoid exponential computation time, a heuristic algorithm is proposed to efficiently solve the formulated problem. Numerical analysis is conducted through case studies to demonstrate the performance gain of cooperative relaying and the comparison between the proposed heuristic algorithm against the optimal solutions.
Keywords :
bandwidth allocation; broadband networks; integer programming; nonlinear programming; radio access networks; telecommunication traffic; CPLEX; RS placement; bandwidth allocation; broadband wireless access network; capacity enhancement; cooperative relaying; heuristic algorithm; mixed-integer nonlinear program; network traffic; numerical analysis; optimal relay station placement; optimization framework; subscriber station; Channel allocation; Decoding; Frame relay; Heuristic algorithms; Interference; Numerical analysis; Performance gain; Resource management; Telecommunication traffic; Wireless networks; Cooperative relaying; decode-and-forward; placement problem.;
fLanguage :
English
Journal_Title :
Mobile Computing, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1233
Type :
jour
DOI :
10.1109/TMC.2009.114
Filename :
5089328
Link To Document :
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