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:
May. 30, 2006
Filed:
Jul. 17, 2000
Toshiki Sugawara, Koganei, JP;
Noboru Endo, Kodaira, JP;
Kenichi Sakamoto, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Interlayer-coordinated communication-line switching in a network including two layers, each having a switching function. In the present invention, a communication apparatus which (1) is connected with a network including (i) lower layer apparatuses which are connected with communication lines of a lower layer and communication lines of an upper layer and conducts line switching in the lower layer and (ii) upper layer apparatuses which are connected with the communication lines of the upper layer and have means for line switching in the upper layer and (2) detects line failure and coordinates line switching using failure information on the lower and upper layer communication lines.