Section: 17.5.3 Session stop procedure
Content: The BM-SC initiates the MBMS session stop procedure when it considers the MBMS session terminated. Typically this will happen when there is no more MBMS data expected to be transmitted for a sufficiently long period of time to justify the release of bearer plane resources in the network. Figure 28: MBMS Session Stop procedure 1. The BM-SC sends a RAR message to all GGSNs listed in the "list of downstream nodes" parameter of the affected MBMS Bearer Context to indicate that the MBMS session is terminated and the bearer plane resources can be released. 2. The GGSN sets the state attribute of its MBMS Bearer Context to ‘Standby’ and sends a RAA message to the BM-SC. An AAR message is not mandated for the Gmb application in response to a RAR- RAA command exchange.