Patent ID: 8902808
Filing Date: 2014-12-02
Classification: H04L,H04W

Abstract:
1. A method for mitigating interference in a wireless backhaul network comprising a plurality of nodes, each comprising a transmitter and a receiver, and wherein the plurality of nodes of the network comprise a plurality of hubs of the wireless backhaul network, each of said plurality of hubs serving a plurality of Remote backhaul Nodules (RBMs), comprising the steps of: determining an appropriate power spectral density level, for each of the plurality of nodes at each of a plurality of tones, based on known scheduling assignments and frequency domain channel gains for each link, comprising: performing an iterative operation to find the power spectral density at each tone, on an individual tone-by-tone basis, or optionally, on a tone set-by-set basis; updating power levels of each node, at each iteration and at each tone or for each tone set; wherein performing the iterative operation comprises, for an initial power level or a power level of a previous iteration, and for an objective function based on scheduling assignments for each node at all tones or tone sets, iteratively optimizing a weighted sum-rate across all nodes, and wherein for an objective function comprising a proportional fairness function, the iterative operation comprises a sum-rate optimization defined by: where: N is total number of subcarriers; k is the scheduled RBM of the lth hub at the nth tone; h W P SINR and S