2 research outputs found
Low-Overhead Coordination in Sub-28 Millimeter-Wave Networks
In this paper, we present some contributions from our recent investigation.
We address the open issue of interference coordination for sub-28 GHz
millimeter-wave communication, by proposing fast-converging coordination
algorithms, for dense multi-user multi-cell networks. We propose to optimize a
lower bound on the network sum-rate, after investigating its tightness. The
bound in question results in distributed optimization, requiring local
information at each base station and user. We derive the optimal solution to
the transmit and receive filter updates, that we dub non-homogeneous
waterfilling, and show its convergence to a stationary point of the bound. We
also underline a built-in mechanism to turn-off data streams with low-SINR, and
allocate power to high-SNR streams. This "stream control" is a at the root of
the fast-converging nature of the algorithm. Our numerical result conclude that
low-overhead coordination offers large gains, for dense sub- GHz systems.
These findings bear direct relevance to the ongoing discussions around 5G New
Radio.Comment: 7 pages, double column, IEEE ICC 201