l case study on a live network in a major city in the United States. The small cell product is Nokia Flexi Zone micro base station, see Chapter 6 for more details on the product. The small cell uses advanced wireless services (AWS) 1.7/2.1 GHz frequency. The spectrum is shared with the macro cell. The bandwidth is 10 MHz. The synchronization is based on GPS. 9.6.1 Site Solution and Backhaul The small cell site solution is shown in Figure 9.7. The small cell is installed in the 10-m light pole. The small cell antenna is located on top of the light pole. The antenna is omni-directional with 5 dBi gain. The backhaul connection uses microwave radio at 58 GHz frequency. The small cell product itself is located below the microwave radio. This micro base station provides 5 + 5 W output power and weights 5 kg. The GPS antenna is integrated into the micro base Figure 9.7 Site solution (1 = micro cell antenna, 2 = microwave transport, 3 = micro base station, 4 = power panel) Learnings from Small Cell Deployments RSCP distribution Before After Figure 9.8 RSRP levels in drive testing before and after small cell installation station. The power panel is also located at the pole. The total weight of the installation is approximately 23 kg. 9.6.2 Coverage and User Data Rates The main target of the small cell installation was to improve the coverage and quality in the busy areas in the city where it is difficult to install a new macro base station. In downtown urban areas small cells have the added benefit of improving coverage along the sidewalks and roadway areas that form urban canyons between the tall skyscraper buildings and are difficult to cover by macro sites. Figure 9.8 shows the RSRP levels and Figure 9.9 the SINR levels measured by drive testing before and after the small cell installation inside the coverage area of the small cell. The median RSRP and SINR improves by 2 dB. The drive testing, however, does not show the small cell coverage benefit for the indoor locations. Another way of illustrating the coverage benef