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:
Oct. 09, 2012
Filed:
Sep. 22, 2009
Yuzo Matsumoto, Tokyo, JP;
Yuzo Matsumoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A network management device includes a topology information generation unit which generates topology information of multi-layer network, a link identification information setting unit which sets identification information to identify links of the multi-layer network, a topology information transmission unit which transmits, to a route calculation engine, the topology information of the multi-layer network generated by the topology information generation unit, a shortest route calculation request transmission unit which transmits, to the route calculation engine, a calculation request of a shortest route, a multi-layer restriction checking unit which checks a restriction condition to the shortest route information received from the route calculation engine, based on the identification information of each link set by the link identification information setting unit, and an exception link selection unit which selects an exception link when the shortest route information transmitted from the route calculation engine does not satisfy the restriction condition of the multi-layer, wherein when the shortest route information received from the route calculation engine does not satisfy the restriction condition of the multi-layer, the network management device repeats setting the exception link and transmitting a re-calculation request of the shortest route, until the restriction condition of the multi-layer is satisfied.