  Focusing on the joint relay selection and power control problem with a view
to maximizing the sum-rate, we propose a novel sub-optimal algorithm that
iterates between relay selection and power control. The relay selection is
performed by maximizing the minimum signal-to-interference-plus-noise-ratio (as
opposed to maximizing the sum-rate) and the power control is performed using a
successive convex approximation. By comparing the proposed algorithm with
existing solutions via extensive simulations, we show that the proposed
algorithm results in significant sum-rate gains. Finally, we analyze the
two-user multi-hop network and show that optimum transmit power of at least for
two transmitting nodes can be found using binary power allocation.
