Section: 30.5 Structure of Associated Session ID
Content: The concept of Associated Session ID is defined in 3GPP TS 23.247[ Architectural enhancements for 5G multicast-broadcast services ]  [140]. The Associated Session ID is used to enable NG-RAN to identify the multiple MBS sessions delivering the same content when AF creates multiple broadcast MBS Sessions via different Core Networks in network sharing scenarios. An Associated Session ID may comprise a Source Specific IP Multicast Address (SSM) or a string. See clause 5.9.4.21.1 of 3GPP TS 29.571[ 5G System; Common Data Types for Service Based Interfaces; Stage 3 ]  [129] for the encoding of Associated Session ID in 5GC SBIs.