Resource management system and method for ensuring qos in internet protocol (ip) networks

摘要

A resource management system and method for ensuring Quality of Service, QoS, in an IP-based network (10). A packet duplicator (43) in an Ingress Gateway, IG, (11) duplicates at least a portion of the incoming traffic packets (41) and labels them as test packets (45) that are to be discarded first in case of congestion. The test packets are sent through the network in addition to the traffic packets to an Egress Gateway, EG, (13). A packet monitor (47) in the EG determines a QoS parameter for the test packets such as a lost-packet or delayed-packet ratio. Based on the determined QoS parameter for the test packets, an admission controller (51) in the EG determines whether any traffic classes should be blocked, and identifies IGs in which to block the incoming traffic packets. The admission controller then signals a packet blocker (55) in an identified IG to block incoming packets of an identified class.