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:
Mar. 31, 1998
Filed:
Aug. 02, 1994
Fujitsu Limited, Kanagawa, JP;
Abstract
A frame relay switching apparatus in a frame relay network employs a frame format used in a frame relay communication between a plurality of terminals, performed by identifying a destination by a data link connection identifier (DLCI) in an address field. Priority or non-priority information for an identifier provided in a frame being transmitted for identifying a destination terminal is registered for each DLCI so that a zone assigned to each of them is not overflown, to prevent a frame having a priority DLCI from being discarded. In case of congestion, all frames having identical non-priority DLCIs are discarded at the same time. The switching apparatus includes a plurality of transmitting buffers provided at each outgoing line, and a common buffer, which can be shared by a plurality of lines. A congested line writes a received frame in the common buffer and takes the frame out from the common buffer to write it in a respective transmitting buffer when the congestion has been resolved. When performing inter-LAN communication, a router sets a priority level, which is determined in accordance with a destination address on a LAN and a LAN protocol, in the address field of a frame relay frame and sends it out to the frame relay network.