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:
Dec. 05, 1995
Filed:
Sep. 13, 1993
Tomoki Osawa, Tokyo, JP;
Seiji Kachi, Tokyo, JP;
NEC Corporation, , JP;
Abstract
In a data communication system having a sending station and multiple receiving stations interconnected by a satellite or a local area network, the sending station transmits a request signal containing an assigned logical link number to the receiving stations. If the assigned logical link is available to each of the receiving stations, each receiving station establishes a logical link to the sending station and transmits an acknowledgement signal to the sending station. During a predetermined period following the transmission of the request signal, the sending station increments a count value in response to receipt of each acknowledgement signal. When the count value exceeds a threshold value, the sending station transmits a broadcast message over the established logical link to the receiving stations. If the count value does not exceed the threshold value during that period, the sending station retransmits the request signal to repeat the count operation to elicit an acknowledgement response from those stations where the assigned link was not previously available.