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    Relay Placement for FSO Multihop DF Systems With Link Obstacles and Infeasible Regions

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    Type
    Article
    Authors
    Zhu, Bingcheng
    Cheng, Julian
    Alouini, Mohamed-Slim cc
    Wu, Lenan
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Date
    2015-05-19
    Online Publication Date
    2015-05-19
    Print Publication Date
    2015-09
    Permanent link to this record
    http://hdl.handle.net/10754/621517
    
    Metadata
    Show full item record
    Abstract
    Optimal relay placement is studied for free-space optical multihop communication with link obstacles and infeasible regions. An optimal relay placement scheme is proposed to achieve the lowest outage probability, enable the links to bypass obstacles of various geometric shapes, and place the relay nodes in specified available regions. When the number of relay nodes is large, the searching space can grow exponentially, and thus, a grouping optimization technique is proposed to reduce the searching time. We numerically demonstrate that the grouping optimization can provide suboptimal solutions close to the optimal solutions, but the average searching time linearly grows with the number of relay nodes. Two useful theorems are presented to reveal insights into the optimal relay locations. Simulation results show that our proposed optimization framework can effectively provide desirable solution to the problem of optimal relay nodes placement. © 2015 IEEE.
    Citation
    Zhu B, Cheng J, Alouini M-S, Wu L (2015) Relay Placement for FSO Multihop DF Systems With Link Obstacles and Infeasible Regions. IEEE Transactions on Wireless Communications 14: 5240–5250. Available: http://dx.doi.org/10.1109/TWC.2015.2434945.
    Sponsors
    This research is supported by an NSERC Discovery Grant. The associate editor coordinating the review of this paper and approving it for publication was N. C. Sagias.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Wireless Communications
    DOI
    10.1109/TWC.2015.2434945
    Additional Links
    http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7110383
    ae974a485f413a2113503eed53cd6c53
    10.1109/TWC.2015.2434945
    Scopus Count
    Collections
    Articles; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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