Patent ID: 7327681

Claim:
An admission control method in an Internet differentiated service network including a bandwidth broker, a plurality of ingress and egress edge nodes, and a plurality of core nodes, comprising the steps of: a) separating an admission control procedure performed at the plurality of ingress edge nodes into a path level process performed by the bandwidth broker and a link level process separated from the bandwidth broker, and enabling the bandwidth broker to allocate an initial path level bandwidth related to the ingress edge nodes; b) enabling a congestion-associated core node to perform a congestion control procedure when a congestion state exists in a specific link on a path, and informing the plurality of ingress edge nodes of the congestion state via the bandwidth broker; c) upon receiving a connection setup request for a new flow, performing a path level admission control function at the ingress edge nodes on the path level by employing a path level bandwidth being initially allocated to each service of a corresponding path via a bandwidth broker; and d) if the initially allocated path level bandwidth is completely used, enabling the link level to be allocated a bandwidth of an unused best-effort service using a movable boundary method, and performing a link level admission control function through the use of a measurement based admission control method.