| 摘要 |
A method is provided of authorising a user of a communication system to be added to a group communication event. The method comprises: selecting a group of users of the communication system; initiating from a host node the group communication event with the group of users; responsive to receiving a group communication acceptance from at least a first user in the group, establishing the group communication event with the first user in the group; receiving at the host node a communication set up request from another user of the communication system; analysing the communication set up request to determine if said communication set up request is associated with said group communication event initiated by the host node; and adding said other user to the group communication event if it is determined that the communication set up request is associated with said group communication event. Aspects of the invention include assigning an Identity (ID) to the conference event and transmitting the ID to the group of users, wherein determining if the communication set up request is associated with said group communication event comprises determining if the request is from a member of the conference group or not.
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