the data volume and the connected UEs in the macro cells decrease. 6. If the operator can use a dedicated frequency for the small cell, it can provide higher throughput since there is no co-channel interference from the macro cell. Learnings from Small Cell Deployments 1) Selection of small cell Small cells can collect traffic (only) if it can be location is important located close to the hot spot users 2) Signal level and quality Small cells increase reference signal received improve with small cells power (RSRP) and quality (RSRQ) 3) UE data rates improve with Higher signal levels and quality turn into higher small cells user data rates 4) Co-channel integration to Co-channel deployment is generally fine including macro network is smooth mobility performance 5) Small cells can offload Total traffic increases with the small cell macro cell traffic Macro cell traffic decreases 6) Dedicated frequency small If the small cell can utilize different frequency than cell gives higher throughput macro, the throughput can be maximized 7) Indoor small cells are less Macro cell interference has less impact on the impacted by macro cells indoor cells due to wall isolation 8) Higher small cell power 5 W output power increases coverage and capacity gives higher capacity of the small cell compared to lower power 9) Product performance and Very good cell availability and success rates stability is excellent 10) Site acquisition and Process improvements, flexible site solutions and backhaul challenges flexible backhaul products needed Figure 9.3 Main learnings from small cell deployments 7. The co-channel interference is relatively simple to manage in indoor small cells because the wall isolation minimizes the interference from the outdoor macro cells to the indoor small cells. 8. The small cell can benefit from high transmission power: more power leads to larger coverage area providing more capacity and more offloading from the macro cells. 9. The product performance was very robust in terms of cell availability and in terms of 