Patent ID: 6470029
Filing Date: 2002-10-22
Classification: H04L,H04Q

Abstract:
A bandwidth control method that is carried out in a network in which a plurality of subscriber nodes accommodating a plurality of subscribers are each connected to each other by trunk nodes, comprising:for the data transfer from subscriber nodes to trunk nodes, setting virtual channels to each of destination subscriber nodes that are relayed by way of said trunk nodes and controlling the transmission rate for the said virtual channels not to exceed the reserved bandwidth; and for the data transfer from trunk nodes to other trunk nodes or to destination subscriber nodes, establishing virtual channel groups according to route by organizing virtual channels that are relayed to said trunk nodes, setting the bandwidth capacity of virtual channel groups between trunk nodes and links from trunk nodes to a destination subscriber node equal to or greater than the sum of bandwidth of said virtual channels and giving said virtual channels the higher level priority to traffic which needs less quality of bandwidth service.