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Research Letters in Communications
Volume 2009, Article ID 721603, 4 pages
Research Letter

PacketTwins: A Novel Method for Capacity Estimation of a Heavy-Loaded Path

School of Information Science and Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received 24 March 2009; Accepted 20 June 2009

Academic Editor: Jun Bi

Copyright © 2009 Jie Xu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We propose a method called PacketTwins for estimating the capacity of heavy-loaded paths. Unlike popular packet pair methods, which probe a path with a series of two equal-sized packets, PacketTwins uses a series of twin probe packets that are slightly different in size. By sending twin probe packets alternately, we can obtain new information about selecting valid samples for capacity estimation when a network path is heavy loaded.