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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions, symbols and abbreviations
  • 4 Conferencing overview
  • 5 Protocol using SIP and SIP events for conferencing
  • 6 Protocol using SDP for conferencing
  • 7 Void.
  • 8 Protocol for floor control for conferencing
  • A.1 Scope of signalling flows
  • A.2 Introduction
  • A.3 Flows demonstrating the creation of a conference
  • A.4 Flows demonstrating a user joining a conference
    • A.4.1 Introduction
    • A.4.2 User calling into a conference
    • A.4.3 User getting invited to a conference
    • A.4.4 User requesting IMS to join another user
    • A.4.5 User joins a private conversation to a conference
  • A.5 Flows demonstrating a user subscribing to the conference event package
  • A.6 Flows demonstrating a user leaving a conference
  • A.7 Flows demonstrating conference termination
  • A.8 Flows demonstrating usage of hold and resume during conferences
  • A.9 Flows demonstrating the use of the Replaces header

A.8 Flows demonstrating usage of hold and resume during conferences

24.1473GPPConferencing using the IP Multimedia (IM) Core Network (CN) subsystemRelease 17Stage 3TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The hold- and resume-service is already described in 3GPP TS 24.228 [4] and the related call flows can be readily applied for the IMS conferencing service. The handling of a conference put on hold by one user is a local matter at the MRFC.