4G Americas Volte and RCS Technology Evolution & Ecosystem

4G Americas Volte and RCS Technology Evolution & Ecosystem

[Type text] TABLE OF CONTENTS Executive Summary .................................................................................................................................... 4 Introduction ................................................................................................................................................. 5 Introduction to VoLTE and RCS ................................................................................................................ 5 Evolution of Communications Services Enabled by VoLTE and RCS ...................................................... 5 Standards Evolution .................................................................................................................................. 6 Overview ................................................................................................................................................ 6 VoLTE and ViLTE .................................................................................................................................. 7 RCS........................................................................................................................................................ 7 Service Interoperability .......................................................................................................................... 8 VoLTE and RCS Technology Maturity and Ecosystem ............................................................................. 9 VoLTE Considerations .............................................................................................................................. 10 Enhanced Single Radio Voice Call Continuity (ESRVCC) ...................................................................... 10 E2E Service Performance (Voice & Video) ............................................................................................. 11 RAN Performance Indicators ................................................................................................................... 13 Link Budget and Voice Quality ................................................................................................................ 15 VoLTE Roaming – Technical and Commercial Considerations .............................................................. 17 Overview .............................................................................................................................................. 17 Impact on Enhanced SRVCC .............................................................................................................. 19 Diameter Signalling .............................................................................................................................. 19 Optimal Media Routing ........................................................................................................................ 20 Traffic Management and Policy ........................................................................................................... 20 Session Border Control ........................................................................................................................ 20 Emergency Call and Lawful Intercept .................................................................................................. 21 Charging .............................................................................................................................................. 21 Regulatory – United States...................................................................................................................... 21 Emergency Services ............................................................................................................................ 21 E9-1-1 Location Requirements ............................................................................................................ 21 4G Americas VoLTE and RCS Technology Evolution & Ecosystem November 2014 1 Alerting Services .................................................................................................................................. 22 Lawful Surveillance .............................................................................................................................. 22 Accessibility for Individuals with Disabilities ........................................................................................ 22 Government Priority Services .............................................................................................................. 23 Regulatory – Canada ............................................................................................................................... 23 E9-1-1 Location Requirements ............................................................................................................ 24 VoLTE and RCS Coexistence .................................................................................................................. 25 IMS – Future Proof Network Evolution Path ............................................................................................ 25 Overview .............................................................................................................................................. 25 Coexistence Aspects ........................................................................................................................... 25 Role-play between Applications and Services ........................................................................................ 27 Overview .............................................................................................................................................. 27 The Role-Play (High Level) .................................................................................................................. 27 Device View ......................................................................................................................................... 28 E2E View ............................................................................................................................................. 29 Evolution of Communication and Messaging – Path to RCS ............................................................... 30 Recommendations and Guidelines for RCS Implementation .................................................................. 30 Overview .............................................................................................................................................. 30 Incremental and Independent Service Evolution Tracks ..................................................................... 30 Messaging Evolution ............................................................................................................................ 31 User Experience .................................................................................................................................. 32 Evolution Modularity ............................................................................................................................. 34 Best Practices for RCS Service Offering ................................................................................................. 34 Integrated User Experience vs. APP Based ........................................................................................ 34 3PP Hosted Solutions vs. Carrier Deployments .................................................................................. 35 RCS Service Grade – Reliability and Availability ................................................................................. 36 Recommendations for RCS Interoperability between Operators ............................................................ 36 RCS vs Over-The-Top (OTT) Communication Services ......................................................................... 37 4G Americas VoLTE and RCS Technology Evolution & Ecosystem November 2014 2 Is RCS a Competitor or Complementary to WebRTC? ........................................................................... 38 RCS – A Platform for Innovation ............................................................................................................. 43 RCS – A Connected Lifestyle for Customers....................................................................................... 43 Mashup Services ................................................................................................................................. 44 API Exposure to Developers ................................................................................................................ 45 Conclusion ................................................................................................................................................. 47 Abbreviations ............................................................................................................................................ 48 Acknowledgements .................................................................................................................................. 49 4G Americas VoLTE and RCS Technology Evolution & Ecosystem November 2014 3 EXECUTIVE SUMMARY Voice over LTE (VoLTE) and a complementary conversational video service specified by GSMA are set to become mainstream technology for IP-based telecommunications, just as voice is an integral part of 2G and 3G networks today. VoLTE enables High Definition (HD) voice quality, helping operators

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