Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-08-22
2006-08-22
Anderson, Matthew (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S433000, C455S518000, C455S416000, C455S436000
Reexamination Certificate
active
07096018
ABSTRACT:
In a group communication system, a mobile station that is not currently under a group communication can participate in a group communication. A location registration signal is transmitted to a base station upon turning on the power of a mobile station or when a mobile station moves between communication zones A group communication number is sent from the mobile station and is examined against a group-communication group number controlling register in a control station The examination determines the presence or absence of a group communication call corresponding to the group-communication number sent by the mobile station Notification information on a relevant call, if present, is sent to the mobile station, which can then participate in the group communication.
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Anderson Matthew
Foley & Lardner LLP
NEC Corporation
Sobutka Philip J.
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