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. 28, 2003
Filed:
May. 04, 2000
Naoko Yaoya, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A handover processing method in a satellite communications system allowing stable and reliable handover process is disclosed. Schedule information is previously registered in each of the satellites. The schedule information of each satellite includes a radius of a coverage area thereof, a point of time provided thereto, and physical locations of a center point of the coverage area thereof according to the point of time. A handover start time is calculated based on the schedule information and the physical location of a mobile station. A control signal regarding the handover start time is transmitted to an adjacent satellite. Since the handover start time is known in advance at both the first satellite and the adjacent satellite, the handover can be performed and completed between them without sending handover request signal.