Realities of LTE Deployment

1. Realities of LTE Deployment Bill Payne Head of Innovation Team CTO Office

2. Agenda Long Term Evolution (LTE) Performance Expectations Deployment Case Study Challenges Conclusion

3. / LTE Performance • Exceeded early LTE Targets • Results confirm LTE’s value and leadership 1 – Achieved results from network trials

4. / Commercial Expectations Capacity and Performance Reliability and Security Total Cost of Ownership 1Meet the demands of Mobile Broadband 2Unify and deliver subscriber data across network and services 3Enable cost effective networks Operators expect 66% of delivered services will be video or video related applications1 Over half of all mobile operators expect security to be a key component in their network Operators expect up to 20% TCO savings annually on their network by deploying LTE 1 – Cisco Virtual Networking index

5. / Network Case Study Network Details 2.3GHz TD-LTE 20MHz Bandwidth (DL 2X2 MIMO & UL 1X2 SIMO) 9 Sectors @ 4W (36dBm) Dense Urban outdoor coverage Full Evolved Packet core with PCRF and HSS Test Cases RF Test Control Plane/User Plane Latencies & HARQ Mechanism Call Continuity and Handovers Applications LTE Manager Fail Safety and MME Switchover Trial Network Coverage Area - 1.87 by 1.42 Miles

6. / Deployment Challenge Examples Radio Access Network • Quality of Service functionality • Handover Delay • Interference • Overall Performance Network Management • End to End Management • Configuration Management • Performance Management • Fault Management Planning & Optimization • Network Configuration • Performance – e.g., Handover Optimization User Equipment • UL Tx Power • Battery life DL Application throughput in the drive test route

7. / Sample Test Case Findings • RF Path Balance Challenges • Significant interference between sectors resulting in very low througput (DL and UL) • Position 1 - Sector 95 interfering with Sector 98 • Position 2 – Sector 95 interfering with Sector 96 or 97 • Possible Actions • Multi-frequency Network with inter-frequency handoff features • UE Power Class • ICIC Techniques • Smaller cells with lower DL Tx power • - AWT-like solutions

8. / Sample Test Case Findings Control Plane Latency Measuring average network registration time (ATTACH) under different RF conditions Possible Actions - Medium RF conditions for RSRP and SNIR Table 1: Control Plane Latency Network Performance Determining download throughput performance as a function of the Signal to Interference ratio (SIR) measurement UL Application Throughput as a function of SIR Measurement

9. / Conclusions User Equipment: Introducing additional UE Power Class with higher Max UL Tx power will allow better mobile devices performance in an urban environment (multi-path and/or indoor coverage) Planning & Optimization: Solutions such as SON can enable efficient deployments of 4G networks, and optimize them to deliver better performance Network Management: End-to-end network visibility and ability to check each UE activity status will offer operators tremendous value in service delivery Radio Access Network: Small cells and indoor solutions will play a big role in addressing network capacity & improved subscriber experience in densely populated area due to RF propagation and lack of low TX power radios