Heterogeneous small-cell networks (HetNets) are considered as a standard part of future mobile networks where operator/consumer deployed small-cells, such as femtocells, relays and distributed antennas (DAs), complement the existing macrocell infrastructure. This paper proposes the need oriented deployment of small-cells and device-to-device (D2D) communication around the edge of the macrocell such that the small-cell base stations (SBSs) and D2D communication serve the cell-edge mobile users, thereby expanding the network coverage and capacity. In this context, we present competitive network configurations namely: (i) femto-on-edge, (ii) DA-on-edge, (iii) relay-on-edge and (iv) D2Dcommunication-on-edge, where femto base stations, DA elements, relay base stations and D2D communication, respectively, are deployed around the edge of the macrocell. The proposed deployments ensure performance gains in the network in terms of spectral efficiency and power consumption by facilitating the cell-edge mobile users with small-cells and D2D communication. In order to calibrate the impact of power consumption on the system performance and network topology, this paper discusses the detailed breakdown of the end-to-end power consumption which includes backhaul, access and aggregation network power consumptions. Several comparative simulation results quantify the improvements in spectral efficiency and power consumption of the D2D-communication-on-edge configuration to establish a greener network over the other competitive configurations. This publication was made possible by NPRP grant 4-1293-2-513 and NPRP grant 09-341-2-128 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.