| 摘要 |
A method of controlling Group establishment for an IP multimedia communication service facilitated over a communications network, wherein an established Group comprises a set of member Users each of which possesses a User Equipment and, at Group establishment, members' group by a server of said communications network. The method comprises, within said communications network, defining for each of a set of Users of said service, a Group membership policy defining Groups that the User does or does not wish to join. Prior to Group establishment, for each User selected for possible inclusion in the Group, the Group membership policy for that User is used to determine whether or not the User may wish to be included. Invitations are sent only to CBUS those users for which it is determined that they Get may wish to be included in the Group.
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