Patent ID: 6408006
Filing Date: 2002-06-18
Classification: H04L

Abstract:
A method of allocating buffers in a packet switched digital communication system offering different classes of service, each class of service being associated with a QoS queue having a different priority, comprising the steps of:storing, for an incoming packet arriving at a node and associated with a class of service q, current time C as a timestamp Pqx; passing said incoming packet into a QoS queue for said class of service q associated with said incoming packet; setting a variable Hq equal to Pqx when said incoming packet arrives at the head of its queue; determining from said variable Hq a buffer limit Lq for the queue associated with said class of service q; maintaining a variable Bq representing the amount of buffering in said queue associated with said class of service q; and dropping a new incoming packet for said class of service q if said new incoming packet would result in said variable Bq being greater than said buffer limit Lq.