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. 07, 2001
Filed:
Apr. 30, 1999
Thomas Peter Emmons, Jr., Mesa, AZ (US);
Shawn Hogberg, Chandler, AZ (US);
Gerald Joseph Davieau, Eldersburg, MD (US);
Jim Startup, Tempe, AZ (US);
Susan Chen, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
In a communications system, an earth-based subscriber unit (,, FIG.,) receives at least one communications beam (,, FIG.,) transmitted from one or more moving satellite communications nodes (,). The earthbased subscriber unit evaluates which communications beam should be selected based on the power received (FIG.,), Doppler frequency shift (,), link quality, (,), interference level (,), and satellite and network specific parameters (,). By considering these factors, the earth-based subscriber unit selects the communications beam (,) that will provide the optimum service and reduce the likelihood that an inter-satellite hand over of the call will be required while the call is in progress.