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:
Apr. 07, 1998
Filed:
Apr. 12, 1995
Yuji Goto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Even when a multi-spot beam is utilized, a demand assignment multiple access (DAMA) type satellite communication can be established between a plurality of satellite earth stations installed in one zone located opposite to another zone where a control station is installed, and between the control station and the satellite earth station installed in the same zone. The control station transmits a channel setting signal for setting a communication channel to the satellite earth stations installed in the opposite zones by using a CSC signal, and further sets a channel of a transmitting/receiving unit in such a manner that after the CSC signal derived from the satellite earth station has been received, this CSC signal is returned thereto. A repeater station has a function such that repeater station receives the CSC signal to return this CSC signal, and also receives a communication signal to return this communication signal. The satellite earth station includes a delay device for setting a time defined as after the CSC signal is received, until a response signal is transmitted, based on the received delay data.