  Millimeter (mm) wave picocellular networks are a promising approach for
delivering the 1000-fold capacity increase required to keep up with projected
demand for wireless data: the available bandwidth is orders of magnitude larger
than that in existing cellular systems, and the small carrier wavelength
enables the realization of highly directive antenna arrays in compact form
factor, thus drastically increasing spatial reuse. In this paper, we carry out
an interference analysis for mm-wave picocells in an urban canyon with a dense
deployment of base stations. Each base station sector can serve multiple
simultaneous users, which implies that both intra- and inter-cell interference
must be managed. We propose a \textit{cross-layer} approach to interference
management based on (i) suppressing interference at the physical layer and (ii)
managing the residual interference at the medium access control layer. We
provide an estimate of network capacity and establish that 1000-fold increase
relative to conventional LTE cellular networks is indeed feasible.
