Multicast transmission continues without further involvement of the site that has left the group. MGRS Group Membership Addition Group Membership Addition occurs when a site wishes to join the group, or if the initiating site invites a new site to join the group. Once the group membership addition is confirmed, the MGRS for the site wishing to join the group propagates the change up its hierarchy until a stable level is reached. MGRS propagates the join up its hierarchy until a stable hierarchy level is reached. The MLIC from the session connection addition site is directed to add the specified session from its tunneling table.
Multicast transmission continues with the new site included in the group.
MGRS Group Termination Group termination occurs when the initiating site terminates the current group, affecting every site. It could be seen that a group termination is a special case of group membership deletion, which can be modeled as n sequential group membership deletions. However, it is more efficient in terms of network utilization to perform the group termination using an atomic Group Termination command, since all relevant interconnection topology for the given group could be released simultaneously. The definition of a server based Multimedia Multicasting Framework would enable the establishment of an orderly hierarchical structure for inter-APAN multicast traffic transmission. This reduces the need for periodic flooding of the network which occurs.