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:
Apr. 21, 2009
Filed:
Dec. 08, 2004
John M. Harris, Chicago, IL (US);
Ronald T. Crocker, St.Charles, IL (US);
Thomas B. Hart, West Dundee, IL (US);
Valentin Oprescu-surcobe, Northbrook, IL (US);
John M. Harris, Chicago, IL (US);
Ronald T. Crocker, St.Charles, IL (US);
Thomas B. Hart, West Dundee, IL (US);
Valentin Oprescu-Surcobe, Northbrook, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A server () designates and assigns each of a plurality of communication devices to at least one of a plurality of groups. The server () prepares a communication having presence information corresponding to a status of the communication devices in the group; determines network infrastructure device(s) serving the group; and transmits, at a pre-determined time, the communication to the network infrastructure device(s). A network infrastructure device (--) receives the communication and transmits, as a common channel signal during the pre-determined time, a signal with the presence information. A communication unit () receives an indication of the pre-determined time; transmits, at an interval proximate to the pre-determined time, a signal indicating the communication device's status; and receives, at the pre-determined time, the signal with the presence information.