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Relay Assignment for Max-Min Capacity in Cooperative Wireless Networks

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3 Author(s)
Pham, T.T. ; Dept. of Electr. & Comput. Eng., Univ. of Saskatchewan, Saskatoon, SK, Canada ; Nguyen, H.H. ; Tuan, H.D.

This paper is concerned with the problem of relay assignment in cooperative wireless networks having multiple sources, multiple relays, and a single destination. With the objective of maximizing the minimum capacity among all sources in the network, a mixed-integer linear programming (MILP) problem is formulated, which can be solved by standard branch-and-bound algorithms. To reduce computational complexity, a greedy solution in the form of a lexicographic bottleneck assignment algorithm is proposed. Simulation results obtained for the IEEE 802.16j uplink scenarios show that the greedy algorithm performs very close to the optimal solution but at a much lower computational cost. The proposed greedy solution can also be tailored to provide further improvements on other network performance criteria.

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Vehicular Technology, IEEE Transactions on  (Volume:61 ,  Issue: 5 )