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:
Jan. 16, 2001
Filed:
Apr. 10, 1996
Soheil Sayegh, Gaithersburg, MD (US);
Comsat Corporation, Bethesda, MD (US);
Abstract
In a method of synchronizing mobile communication devices employed in a non-geostationary satellite communication system according to a paging time plan using geographical paging cells, a geographical region is segmented into a plurality of the geographical paging cells, the mobile communication devices are divided into subgroups according to their location in one of the geographical paging cycles. A plurality of beams are transmitted from non-geostationary satellites to the mobile communication devices positioned within the geographical paging cells according to the paging time plan. The paging time plan requires that each of the beams be transmitted in at least one frame including at least one paging cycle having a plurality of time slots. The time slots occur at fixed intervals relative to time slots occurring in paging cycles of subsequent occurring frames. In each of the plurality of time slots, one of the plurality of beams is targeted to at least a portion of one of the plurality of geographical paging cells not targeted by other ones of the plurality of beams.