Cellular networks are evolving towards dense deployment of small cells. This in turn demands flexible and efficient backhauling solutions. A viable solution that reuses the same spectrum is wireless backhaul where the Small Base Station (SBS) acts as a relay. In this paper, the authors consider a reference system that uses wired backhaul and each Mobile Station (MS) in the small cell has its uplink and downlink rates defined. The central question is: if they remove the wired backhaul, how much extra power should the wireless backhaul use in order to support the same uplink/downlink rates? They introduce the idea of Wireless-Emulated Wire (WEW), based on two-way relaying and network coding.