ch to extending outdoor base station signals in indoor environments. It is a network of geographically separated antennas which receive input from a common base station source. Distributed antenna system uses multiple smaller antennas to cover the same area (that otherwise the macro base station would cover) and provides deeper penetration and coverage inside buildings. The RF input to the antennas can be conveyed either by lossy coaxial cables or more expensive optical fiber links. Some in-building distributed antenna systems can sup- port multiple operators and standards at various levels, but advanced equipment is needed to meet a wider range of frequency bands and power outputs. Unwanted signal by-products and interference are serious issues in a shared distributed antenna system environment. Carrier Wi-Fi provides improved, scalable, robust unlicensed spectrum coverage and is often deployed as a stand-alone solution. It is an easy data offload from the cellular networks with access and policy control capable of supporting large numbers of users. Wi-Fi with new standards, such as Hotspot 2.0, can provide high data rates for users who are continuously streaming content on mobile devices. 5G Network Architecture In conjunction with the question of network expansion, there are other business imperatives. Mobile data transport architectures must be evaluated based on characteristics such as fast- ness, time to market, cost-effectiveness, operational and architectural simplicity, expandabil- ity, and flexibility. Energy consumption and physical size are also key factors in the deployment of new network architectures considering power and space are expensive and scarce resources at base station sites and central offices (COs). A centralized-RAN, or C-RAN architecture addresses capacity and coverage issues, while supporting mobile fronthaul and/or backhaul solutions as well as network self-organization, self-optimization, configuration, and adaptation with software control and management through SDN and NFV. Cloud-R