초록 ▼

For establishing an expanded group call in a mobile communication system which has group call groups formed by a plurality of mobile stations, a network infrastructure which has at least one exchange, a plurality of base stations and telecommunication connections between them, and a group call datab

For establishing an expanded group call in a mobile communication system which has group call groups formed by a plurality of mobile stations, a network infrastructure which has at least one exchange, a plurality of base stations and telecommunication connections between them, and a group call database for maintaining data concerning group calls, an expanded group call set-up facility concerning a first group call group is activated in the group call database, the facility expanding the group call o concern at least one other group call group. The network infrastructure receives a group call set-up request concerning the first group call group, the network infrastructure checks whether an expanded group call setup facility has been activated for the first group call group, calls the mobile stations of the first group call group and the mobile stations (404) of each at least one other group call group to the expanded group call to be established, and guides the respective mobile stations to communicate on one traffic channel at each base station of the expanded group call.

대표청구항 ▼

[ We claim:] [1.] A method for establishing an expanded group call in a mobile communication system which has a plurality of group call groups each formed of a plurality of mobile stations, and a network infrastructure which includes at least one exchange, a plurality of base stations, telecommunica

[ We claim:] [1.] A method for establishing an expanded group call in a mobile communication system which has a plurality of group call groups each formed of a plurality of mobile stations, and a network infrastructure which includes at least one exchange, a plurality of base stations, telecommunication connections between the at least one exchange and respective ones of said base stations, and a group call database for maintaining data concerning group calls, said method comprising the steps of:activating an expanded group call set-up facility concerning a first said group call group in said group call database, the expanded group call set-up facility expanding a group call to concern at least one other said group call group, as an expanded group call to be established;said network infrastructure receiving a group call set-up request concerning said first group call group;said network infrastructure checking from said group call database whether an expanded group call set-up facility has been activated for said first group call group;said network infrastructure noticing from said group call database that the expanded group call set-up facility has been activated for said first group call group;said network infrastructure calling those of said mobile stations which form said first group call group, to said expanded group call to be established and said network infrastructure calling those of said mobile stations which form said at least one other group call group, to said expanded group call to be established; andsaid network infrastructure establishing said expanded group call, by guiding those of said mobile stations which form said first group call group and those of said mobile stations which form said at least one other group call group all to communicate on one traffic channel each via a respective said base station servicing any said mobile station serving any said mobile station which is to participate in said expanded group call.