Maintaining quality of service for multi-media packet data services in a transport network

摘要

A method and an apparatus for maintaining a quality of service (QoS) for a multi-media packet data service in a transport network is provided. The method comprises determining a first packet loss indication for a first flow of QoS traffic packets. The method further comprises determining a second packet loss indication for a second flow of QoS traffic packets, wherein the determination of the first packet loss indication for the first flow of QoS traffic packets is independent from the determination of the second packet loss indication for the second flow of QoS traffic packets. The method further comprises determining whether to drop the first flow of QoS traffic packets based on the first packet loss indication or to drop the second flow of QoS traffic packets based on the second packet loss indication. By using per-flow independent packet loss statistics to determine whether that flow should be dropped and gradually dropping such QoS flows having the most impact on a desired QoS performance, a reduced number of QoS flows may be dropped to recover a data transport network from congestion.

主权项

1. A method, comprising:
measuring a first packet loss rate of a first flow of quality-of-service (QoS) packets over a backhaul transport network between a first base transceiver station and a radio network controller; measuring a second packet loss rate of a second flow of QoS packets over the backhaul transport network between a second base transceiver station and the radio network controller; selectively dropping the first flow or the second flow based on a first comparison of the first packet loss rate to a first threshold that is determined based on a first QoS requirement for the first flow and a second comparison of the second packet loss rate to a second threshold that is determined based on a second QoS requirement for the second flow, receiving a request to drop at least one of the first or second flow; rejecting the requested drop of the at least one of the first flow or the second flow; and causing, in response to the first packet loss rate or the second packet loss rate exceeding a corresponding threshold in a next packet window, the at least one of the first flow or the second flow to request dropping of the at least one of the first flow or the second flow after a previously requested drop was rejected.