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:
Jun. 12, 2007
Filed:
Dec. 18, 2002
Nigel M. May, Phoenix, AZ (US);
Mark A. Marick, Chandler, AZ (US);
Bradley R. Schaefer, Chandler, AZ (US);
Mark L. Shaughnessy, Phoenix, AZ (US);
William J. Sugden, Phoenix, AZ (US);
Nigel M. May, Phoenix, AZ (US);
Mark A. Marick, Chandler, AZ (US);
Bradley R. Schaefer, Chandler, AZ (US);
Mark L. Shaughnessy, Phoenix, AZ (US);
William J. Sugden, Phoenix, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A proactive speculation method decreases the call setup time for private calls () and selective dynamic group calls (). In a push-to-talk dispatch network () an originating mobile unit () sends a wake-up packet () to the dispatch network (). Prior to initiating the push-to-talk function, the target mobile units () receive a wake-up packet () from network (). Thereby, prior to establishing the push-to-talk function, each of the mobile units in the push-to-talk call have been coupled via RF links. If the originating mobile unit has a current IP address, direct wake-up packets () may be sent.