The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
Jul. 28, 2003
Hiroshi Mikami, Tokyo, JP;
Hiroshi Mikami, Tokyo, JP;
NEC Corporation, Tokyo, JP;
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.