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This paper studies the improvement of the achievable end-to-end data rate ofground users assisted with unmanned aerial vehicles (UAVs) and tetheredballoons (TBs). The goal is to maximize the end-to-end throughput of a networksuffering from the absence of terrestrial infrastructure. First, we solve aninteger linear programming problem to optimize the associations. Then, we solvethe UAVs transmit powers optimally by converting the problem into a convex one.Subsequently, an efficient algorithm is proposed to optimize the UAVsplacement. Finally, our mathematical formalism is illustrated with someselected numerical results that show the advantages provided by our proposedscheme.

Resource and Placement Optimization for Multiple UAVs using Backhaul Tethered Balloons