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:
Oct. 06, 1998
Filed:
Mar. 05, 1996
Hiroaki Nakanishi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A slot assign system has a central station and a plurality of peripheral stations, and the communication between them is made through an artificial satellite. The central station stores pre-assign slot information of each of the peripheral stations, and multiplexes slot assign information to be changed at a next frame over the pre-assign slot information. The peripheral station, on receipt of the slot assign information, transmits the next frame using a slot assigned to itself. The central station sends a vacant slot with no pre-assignment as a non-assign information signal, and the peripheral station recognizing the vacant slot transmits, using the slot assigned to itself, a reservation request for using the vacant slot. The central station transmits a frame next to the frame to which the slot has been assigned. Thus, the slot assign information is centrally controlled by the central station and can be changed without a need for cutting off the data link between the central station and the peripheral stations.