An MC service user can request the membership or affiliation list on an MC service group regardless the user's group membership or affiliation.
below illustrates the membership or affiliation list query on an MC service group.
The group management client of the MC servicer user requests the membership or affiliation list on the MC service group from the group management server by sending a group information query request. The query type is included.
The group management server checks whether the MC servicer user is authorized to perform the query. If authorized, then the group management server retrieves the requested group information based on the query type.
The group management server sends a group information query response including the retrieved group information to the group management client.