Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Patent
1997-10-23
1999-10-19
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
455520, 455525, 455 62, H04Q 728
Patent
active
059704179
ABSTRACT:
A method for maintaining a group call in a mobile radio system, and a mobile station in a mobile radio system, wherein the geographical area covered by the system is divided into radio cells. Each radio cell includes a base station. A group call is established between the mobile stations belonging to a group call group and residing within the areas of the radio cells forming a limited group call area. In order that the mobile station, upon changing radio cells, is able to select the base station within the area of which the group call is in progress, the respective base stations send one or a plurality of group call maintenance messages to the mobile stations involved in the group call. The group call maintenance message contains information concerning the base stations located within the areas of the radio cells forming the group call area, and the group call group identity.
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Suikkola Rauno
Toyryla Hannu
Eisenzopf Reinhard J.
Kincaid Lester G.
Nokia Telecommunications Oy
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