BAND CONTROL SWITCH AND CONTROL METHOD THEREOF

摘要

A band control switch and a band control method thereof are provided to lower the limited band of each subscriber using a band control switch when the use rate of traffic is higher than a threshold value in an output port and hold the guaranteed band of all subscribers using the band control switch, thereby holding service support only in at least contracted guaranteed band. A grade initializing unit initializes the contract band grade information of a subscriber recorded in a contract band grade table(S510). A traffic load calculator determines whether a buffer threshold value separation state occurs(S520). The traffic load calculator determines a registration subscriber to be a limited band control target when it is determined that the buffer threshold value separation state occurs(S530). The traffic load calculator calculates the traffic load of an output port corresponding to the determined registration subscriber(S540). A grade controller compares the calculated traffic load of the output port with the maximum threshold value and the minimum threshold value and controls the limited band grade information of subscribers passing through the output port(S550,S560). The grade controller reflects the limited band grade information of a subscriber passing through the controlled output port to a band grade table applying a service registered subscriber(S570).