Stages inter-entreprises
 

Objectifs : Gain knowledge on the RCS service architectures, service enablers and convergence of RCS with VoLTE/ViLTE (RCS-5).

Public : Telecommunication Engineers, Network Architects, Telecommunication Consultants, Information System Architects

Pré-requis : Knowledge on IMS network and service architectures

Durée : 2

Date :

Lieu :

RCS : Rich Communication Suite

Rich Communication Services (RCS) is backed by the GSM Association and offers subscribers an innovative set of features that enhance the capabilities of SMS and MMS technologies. Subscribers can conduct individual and group chat sessions and exchange images or videos during voice calls or chats. Messaging sessions are effortlessly launched from the address book, which contains traditional contact information as well as enhanced information, including communication capabilities like chat, video/image share, and file transfer. With RCS, operators can combat increasingly popular “over-the-top” (OTT) services like Skype and Facebook Messenger. RCS has the significant advantage of working across networks and devices, unlike siloed OTT services that typically can be used only by those subscribers who have downloaded the relevant app to their device. For operators with an IMS core, RCS devices connect via the appropriate access network, be it Wi-Fi, LTE, 3G. The device must then register and authenticate prior to accessing the RCS Messaging Server. Authentication, registration and SIP routing are all handled by different components of the IMS core. Once a device is registered, the IMS core routes all RCS messages to the RCS Messaging Server and other IMS networks. The current set of services specified by GSMA in RCS 5.3 blends all services from RCS-e 1.2, and most of the functionality from RCS Release 1-4, as well as extending the basis with new services such as IP Voice/Video Calling. RCS 5.3 functionality complements VoLTE (Voice over LTE) and ViLTE (Video over LTE) encompassing a set of advanced communication services based on IMS. The goal of this course is to present the RCS Service, describe the RCS release functionality and focus on RCS-e (brief overview)and RCS 5.3 services, call flows, roaming and interworking considerations.

1. RCS basics

  • 1.1. What is RCS?
  • 1.2. Why RCS?
  • 1.3. RCS principles
  • 1.4. RCS simplified architecture
  • 1.5. Overview of RCS Release functionality
    • 1.5.1. RCS Release 1 and its functionalities
    • 1.5.2. RCS Release 2 and its functionalities
    • 1.5.3. RCS Release 3 and its functionalities
    • 1.5.4. RCS Release 4 and its functionalities
    • 1.5.5. RCS-e and its functionalities
    • 1.5.6. RCS Release 5 and its functionalities
  • 1.6. RCS versus Joyn
    • 1.6.1. RCS-e versus Joyn Hot Fixes
    • 1.6.2. RCS 5.1 versus Joyn Blackbird
    • 1.6.3. RCS 5.1 versus North American RCS
    • 1.6.4. RCS 5.3 versus Joyn Crane
  • 1.7. RCS client manufacturers

2. RCS-e

  • 2.1. RCS-e Principles
  • 2.2. RCS-e architecture
  • 2.3. RCS Service Configuration
    • 2.3.1. IMS registration related configuration parameters
    • 2.3.2. RCS-e client configuration parameters
  • 2.4. Registration process
    • 2.4.1. RCS identities
    • 2.4.2. First time registration and discovery of contacts who are also RCS-e users
    • 2.4.3. Re-registration
    • 2.4.4. Deregistration
    • 2.4.5. Authentication methods during registration
      • 2.4.5.1. SSO/GIBA
      • 2.4.5.2. IMS Authentication and Key Agreement (AKA) authentication
      • 2.4.5.3. Digest (user/password authentication)
  • 2.5. Capability discovery to understand the subset of RCS-e services available to communicate with other contacts
    • 2.5.1. RCS-e capabilities : chat, file transfer, image share, video share
    • 2.5.2. Capabilities discovery via SIP OPTIONS message
    • 2.5.3. Capability discovery via presence
    • 2.5.4. Capability polling via SIP OPTIONS message
  • 2.6. RCS-e protocols : SIP, RTP, MSRP
  • 2.7. APN and roaming considerations for RCS-e
  • 2.8. RCS-e Service and Feature Tag Value
  • 2.9. Call flows of RCS-e services
    • 2.9.1. Instant messaging (IM)/Chat service
      • 2.9.1.1. 1-to-1 chat : Initiation and termination
      • 2.9.1.2. Group chat : initiation and termination, adding a participant, removing a participant, message exchange,
    • 2.9.2. RCS-e during a call
      • 2.9.2.1. Capabilities exchange during a call
      • 2.9.2.2. Video share during a call
      • 2.9.2.3. Image share during a call
    • 2.9.3. File transfer

3. RCS 5.3

  • 3.1. RCS 5.3 versus RCS 5.2 versus RCS 5.1.
  • 3.2. RCS 5.3 architecture
  • 3.3. RCS 5.3 protocols : SIP, RTP, MSRP, HTTP, IMAP, SUPL
  • 3.4. Call flows of RCS 5.3 services
    • 3.4.1. Standalone messaging
    • 3.4.2. 1-to-1 chat
    • 3.4.3. Group chat
    • 3.4.4. File transfer
    • 3.4.5. Content sharing and video share during a call
    • 3.4.6. Content share and video share without a call
    • 3.4.7. Social presence information
    • 3.4.8. RCS IP voice call
    • 3.4.9. RCS IP video call
    • 3.4.10. Geolocation
  • 3.5. RCS-5 Interworking Guidelines (IR 90)
  • 3.6. APN and Roaming considerations for RCS 5
    • 3.6.1. Internet APN for RCS 5
    • 3.6.2. IMS APN for RCS 5
  • 3.7. Convergence of RCS 5 and VoLTE/ViLTE


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