Patent ID: 7047311
Filing Date: 2006-05-16
Classification: H04L

Abstract:
1. A bandwidth management apparatus for use in a network in which a plurality of nodes, including two or more edge nodes connected to other networks or users, are connected by links, said bandwidth management apparatus for managing the reservation of a bandwidth by each of said edge node, comprising: a link-bandwidth table for recording a residual bandwidth of each of said links; and an admissible bandwidth calculating device for calculating an admissible bandwidth in response to a received bandwidth reservation request containing requested bandwidth information representing a requested bandwidth for reservation and destination information representing destination edge nodes; wherein said admissible bandwidth calculating device includes: a residual bandwidth calculating part which decides whether the reservation of said requested bandwidth is unacceptable or acceptable, depending on whether the residual bandwidth of at least one of all links from an arbitrary one of said edge node to all of said destination edge nodes is less or more than a bandwidth necessary for reservation based on said requested bandwidth; and a bandwidth reservation part which, if the reservation of said requested bandwidth is acceptable, updates the residual bandwidth in said link-bandwidth table corresponding to each link of the shortest path to each destination edge node by subtracting said bandwidth necessary for reservation from said residual bandwidth.