Technical Overview of RCS - Rich Communication Services

About this course

Rich Communication Services (RCS) is the next evolution of mobile messaging—designed to move beyond traditional SMS and MMS into a world of rich, interactive, and intelligent communication. From real‑time chat and multimedia sharing to AI‑powered business conversations, RCS brings modern messaging capabilities directly into the native mobile messaging experience.Technical Overview of Rich Communication Services (RCS) is a comprehensive, practical course designed to help you understand how RCS actually works end‑to‑end in real mobile networks. This course is not just about features—it focuses on the architecture, protocols, application servers, and call flows that make RCS possible.The course begins by explaining why RCS exists, starting with the evolution of messaging from early wireless voice systems to SMS, MMS, and today’s data‑driven messaging services. You’ll understand why operators needed a modern, standardized alternative to OTT messaging apps and how RCS fills that role.You’ll then explore the role of GSMA and the standards that define RCS globally, including key concepts and capabilities that differentiate RCS from legacy messaging. From there, the course dives into the GSMA Reference Architecture, showing RCS as a true End‑to‑End service spanning devices, operator networks, and inter‑operator interfaces.A major focus of this course is IMS (IP Multimedia Subsystem)—the foundation on which RCS is built. You’ll learn only the IMS concepts that matter for RCS, including identity, registration, routing, session control, and service triggering, without getting in too much complexity.The course also provides clear, practical explanations of the core protocols used in RCS:SIP for session control and signalingMSRP for real‑time messaging transport