Patent ID: 6075771
Filing Date: 2000-06-13
Classification: H04L

Abstract:
A method of controlling, in a digital communications system, flow of traffic into a resource having a shared input queue of finite capacity, and further having a flow of traffic which originates from a plurality of information sources, and wherein a committed information rate is pre-established for each source and the traffic from each source carries an excess indication when it is flowing at a rate in excess of said committed information rate, the method comprising, for each source, carrying out steps of:a) at call set up, defining a fair burst Bf representing a number of bits that may be transferred from the source within a predetermined time interval T such that the sum of the fair bursts Bf for all sources does not exceed resource queue size, and a fair information rate Bf/.DELTA.T, and .DELTA.T is a time interval over which a burst rate is measured;b) determining whether traffic from said source carries an excess indication;c) determining whether the resource is experiencing congestion;d) if step b determined that the traffic carried an excess indication and step c determined that the resource is congested, subsequently measuring a current information rate of traffic carrying an excess indication and determining if said current rate of incoming traffic is greater than the fair information rate; ande) if the current information is greater than said fair information rate, discarding the incoming traffic.