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:
Jul. 08, 2003
Filed:
Dec. 28, 1999
Yushi Niwa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In data communication utilizing a radio transmission channel, even in a case where the radio channel is disconnected and a data communication blackout occurs, the center side continues data communication processing, by obtaining information on a period where the data communication is interrupted in advance. The system comprises an application server provided in the center, a radio data communication terminal that performs data communication while moving, a mobile gateway provided in the center as a relay device between the application server and the radio data communication terminal, and a period notification device that transmits period information T at predetermined periods. The radio communication channel is disconnected by the period information transmitted from the period notification device, and the mobile gateway performs communication processing during the radio communication disconnection.