Transcription of VoLTE Implementation Guide - GSMA
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VoLTE Implementation Guide - GSMA
VoLTE Implementation Guide July 2020 GSM Association VoLTE Implementation Guide Page 2 of 21 VoLTE Implementation Guide 1 Introduction 3 Overview 3 Scope 3 References 4 2 Business Drivers 4 Business drivers of VoLTE on Home Network 4 Business Drivers for VoLTE Roaming 5 Customer Experience 5 Coverage 5 Possible Business Case Justifications (quick bullet points) 6 3 Selecting Roaming Partners - Handsets, Coverage, and Capacity Bands 7 Frequencies 7 Handsets 8 Device based Steering of Roaming 9 4 Billing Issues 9 Comparison of QCI-based charging and APN-based charging 9 Signalling 10 Retail Presentation 10 Billing from Home Network Elements 10 Time Zones 10 5 Technical Issues Important to Roaming Managers 11 Enable / Disable IMS-APN 11 IMS Registration 11 QCI Settings 12 GBR Configurations 12 Lawful Intercept 12 Single Radio Voice Call Continuity (SRVCC) 13 Fraud Systems 13 Emergency Calling 13 eCall 14 Local Number Translation & Routing 14 Determination of Location / Time-Zone (TZ) 15 IPv4/IPv6 Compatibility Issues 15 WPS (Wireless Priority Service)
leveraging on the capabilities of the IMS (IP Multimedia Subsystem) to offer voice and messaging services over LTE. In this context, VoLTE is important because it enables decommissioning of legacy CS networks as voice services can be migrated to LTE networks. Furthermore, VoLTE provides customers with enhanced voice quality, reduced
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