The document discusses the future of mobile networks known as HetNets and the increasing role of small cells. It notes that small cell deployments are growing rapidly, with over 1 million cells deployed by some major operators. Small cells provide benefits like improved coverage, greater capacity and spectrum efficiency. The document also discusses network considerations for HetNets including interference management and backhaul options. It examines usage scenarios for small cells like in homes, enterprises, rural networks and integrated with Wi-Fi.