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Optimal Relay Selection in IEEE 802.16j Multihop Relay Vehicular Networks

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4 Author(s)
Yu Ge ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; Su Wen ; Yew-Hock Ang ; Ying-Chang Liang

This paper examines the IEEE 802.16j multihop relay (MR) technology that improves vehicle-to-infrastructure communications. We study the selection of optimal relay station (RS) for a vehicular subscriber station (SS) that maximizes the end-to-end capacity, assuming that the locations of vehicular SSs are known. By incorporating a highway mobility model, the problem can be formulated into a nonlinear optimization problem and solved for the optimal locations of RSs that guarantee maximal end-to-end capacities to SSs. Numerical results from a case study show that the selection of the corresponding optimal RS increases the expected end-to-end capacity for individual SSs by 50%, as compared with the method without using relays.

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Vehicular Technology, IEEE Transactions on  (Volume:59 ,  Issue: 5 )