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Relay feedback-based power control in multihop wireless networks

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3 Author(s)
Ahmad, S.A. ; Bradley Dept. of Electr. & Comput. Eng, Virginia Tech, Blacksburg, VA, USA ; da Silva, C.R.C.M. ; DaSilva, L.A.

In this paper, we propose a distributed power control scheme which can take into account the end-to-end performance of users in a multihop cellular network. Bottleneck links in a multihop wireless network limit the maximum rate achieved by users along their routes. Under the proposed scheme a link dynamically switches between different power adaptation algorithms based on whether it is a bottleneck or a non-bottleneck link. Specifically, non-bottleneck links iteratively reduce their transmit powers whereas the bottleneck links use power control to exploit the corresponding interference reduction and further increase their signal-to-noise-and-interference ratios (SINRs). We show substantial system throughput performance gain under our scheme and for which, under certain scenarios, we derive a closed-form expression of the converged transmit power levels regardless of their initial values.

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Date of Conference:

Oct. 29 2012-Nov. 1 2012