This document summarizes a presentation on evolving cellular network capacity challenges and potential solutions. It discusses:
1) The looming "capacity crunch" as data usage increases 50-500x by 2025, which will require more spectrum, more spectral efficient technologies, and denser networks.
2) How small cells are helping but macro layers still need to evolve. This includes utilizing more spectrum bands, advanced MIMO techniques like beamforming, and interference management methods like CoMP.
3) The evolution of LTE radio technologies over releases to improve spectral efficiency through higher order MIMO, beamforming, and multi-user MIMO techniques. Gains of up to 40% have been observed in simulations.