Patent ID: 6643258
Filing Date: 2003-11-04
Classification: H04L

Abstract:
A method for managing communication resources in a network containing edge nodes located at a boundary of the network and core nodes located inside the network, comprising the steps of:(a) storing at one edge node an information for obtaining an available amount of communication resources that can be newly allocated in the network to one set of flows which share at least a route from said one edge node to an egress node of the network; (b) carrying out an admission control at said one edge node by newly receiving a request for allocation of communication resources for one flow belonging to said one set of flows, judging whether or not to accept the request according to a requested amount of communication resources and the available amount of communication resources as obtained from the information stored at the step (a) for said one set of flows, and allocating requested communication resources to said one flow when it is judged that the request is to be accepted; and (c) transmitting packets at said one edge node by describing a priority level in each packet according to an amount of communication resources allocated to a flow of the packets at the step (b), such that a core node carries out a transfer processing with respect to received packets according to the priority level described in each received packet, wherein at the step (b), said one edge node interprets a received packet in a resource reservation protocol, and allocates communication resources by using the resource reservation protocol to said one flow indicated by the resource reservation protocol, and at the step (c), each core node transfers a resource reservation protocol packet without interpreting the resource reservation protocol packet.