Group communication system having group number specified by...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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Details

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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