ENHANCING AQM TO COMBAT WIRELESS LOSSES
In order to maintain a small, stable backlog at an internet router buffer, active queue management (AQM) algorithms drop packets probabilistically at the onset of congestion. This causes Transmission Control Protocol (TCP) data flow rates to reduce. However, wireless losses may be misinterpreted as congestive losses and induce spurious reductions in flow rates. A prior art AQM with random early detection (RED), fails to maintain a stable backlog under time-varying wireless losses. However, the present invention can resolve the problem and provide a robust tracking of the backlog to a preset reference level by applying a control-theoretic vehicle, Internal Model principle, to realize such tracking. An integral controller (IC) is used as an embodiment of the principle that is robust against time-varying wireless losses under various network scenarios.
Patent Number: US20130322247A1
Application Number: US13904859A
Inventor: LI, Victor O.K. | Lai, Chengdi | Leung, Ka-Cheong
Priority Date: 30 May 2012
Priority Number: US20130322247A1
Application Date: 29 May 2013
Publication Date: 5 Dec 2013
IPC Current: H04W002802
US Class: 370235
Assignee Applicant: The University of Hong Kong
Title: ENHANCING AQM TO COMBAT WIRELESS LOSSES
Usefulness: ENHANCING AQM TO COMBAT WIRELESS LOSSES
Novelty: Method for maintaining small and stable backlog at router buffer in network, involves providing integral controller (IC) incorporated with active queue management (AQM) to force queue size to track reference queue level
ICT/Telecom
Telecommunication
USA
