Patent ID: 6590865
Filing Date: 2003-07-08
Classification: H04L

Abstract:
A transmission system comprising a transmission line, a communication apparatus connected to the transmission line, and a bandwidth management apparatus for managing bandwidths on the transmission line, whereinthe communication apparatus, when performing isochronous data transmission by using an allocated resource on the transmission line, outputs a resource allocation request including information indicating a minimum bandwidth and a maximum bandwidth to the bandwidth management apparatus before the isochronous data transmission, and wherein the bandwidth management apparatus includes an allocated-resource request table for storing plural allocated-resource requests; and resource management means which decides whether or not a sum of minimum bandwidths of all allocated-resource requests stored in the allocated-resource request table and a minimum bandwidth of the resource allocation request is allocatable from resources on the transmission line when receiving the resource allocation request as an input, allocates a resource for each of the all allocated-resource requests and the resource allocation request such that a bandwidth between a corresponding minimum bandwidth and a corresponding maximum bandwidth is allocated when deciding that the sum is allocatable, and writes the minimum bandwidth and an allocated bandwidth of the resource allocation request in the allocated-resource request table as an allocated-resource request.