12.1 Introduction12.2 Network Evolution from 2G/3G PS Core to EPC12.3 Entering Commercial Phase: Support for Multi-Mode LTE/3G/2G Terminals with Pre-Release 8 SGSN12.4 SGSN/MME Evolution12.5 Case Example: Commercial SGSN/MME Offering12.6 Mobile Gateway Evolution12.7 Case Example: Commercial GGSN/S-GW/P-GW Offering12.8 EPC Network Deployment and Topology Considerations12.9 LTE Access Dimensioning