 Mobile Operators Small Cell Challenges and Solutions Summary of Learnings from Small Cell Deployments Installation Considerations Example Small Cell Case Study 9.6.1 Site Solution and Backhaul 9.6.2 Coverage and User Data Rates 9.6.3 Macro Cell Offloading and Capacity 9.6.4 KPIs in Network Statistics 9.6.5 Mobility Performance 9.6.6 Parameter and RF Optimization Summary LTE Unlicensed Antti Toskala and Harri Holma 10.1 Introduction Unlicensed Spectrum Operation Environment Motivation for the Use of Unlicensed Spectrum with LTE Key Requirements for 5 GHz Band Coexistence LTE Principle on Unlicensed Band 10.7 LTE Performance on the Unlicensed Band Coexistence Performance Coverage with LTE in 5 GHz Band 10.10 Standardization 10.11 Conclusions References LTE Macro Cell Evolution Mihai Enescu, Amitava Ghosh, Bishwarup Mondal and Antti Toskala 11.1 Introduction Network-Assisted Interference Cancellation Evolution of Antenna Array Technology Deployment Scenarios for Antenna Arrays Contents Massive-MIMO Supported by LTE 11.5.1 Sectorization (Vertical)-Based Approaches 11.5.2 Reciprocity-Based Approaches Further LTE Multi-antenna Standardization Release 13 Advanced Receiver Enhancements 11.8 Conclusions References LTE Key Performance Indicator Optimization Jussi Reunanen, Jari Salo and Riku Luostari 12.1 Introduction Key Performance Indicators Physical Layer Optimization Call Setup 12.4.1 Random Access Setup 12.4.2 RRC Connection Setup 12.4.3 E-RAB Setup E-RAB Drop 12.5.1 Handover Performance 12.5.2 UE-Triggered RRC Connection Re-establishments 12.5.3 eNodeB-triggered RRC Connection Re-establishments Handover and Mobility Optimization Throughput Optimization 12.7.1 MIMO Multi-stream Usage Optimization High-Speed Train Optimization Network Density Benchmarking 12.10 Summary References Capacity Optimization Jussi Reunanen, Riku Luostari and Harri Holma 13.1 Introduction Traffic Profiles in Mass Events Uplink Interference Management 13.3.1 PUSCH 13.3.2 PUCCH 13.3.3 RACH and RRC Setup Success Rate 13.3.4 Centralized RAN Down