A merged inline measurement method for capacity and available bandwidth

Authors:
Cao Le Thanh Man;Go Hasegawa;Masayuki Murata
Affiliations:
Graduate School of Information Science and Technology, Osaka University;Graduate School of Information Science and Technology, Osaka University;Graduate School of Information Science and Technology, Osaka University
Venue:
PAM'05 Proceedings of the 6th international conference on Passive and Active Network Measurement
Year:
2005

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Abstract

We have proposed a new TCP version, called ImTCP (Inline measurement TCP), in [1]. The ImTCP sender adjusts the transmission intervals of data packets, and then utilizes the arrival intervals of ACK packets for the available bandwidth estimation. This type of active measurement in a TCP connection (inline measurement) is preferred because it delivers measurement results that are as accurate as active measurement, even though no extra probe traffic is injected into the network. In the present research, we combine a new capacity measurement function with the currently used measurement method to enable simultaneous measurement of both capacity and available bandwidth in ImTCP. The capacity measurement algorithm is essentially based on the packet pair technique, but also consider the estimated available bandwidth values for data filtering or data calculation, so that this algorithm promises better measurement results than current packet-pair-based measurement algorithms.