Projects

Performance Monitoring and Measurement of HARNET

(Funded by the Joint Universities Computer Centre, 1/1/2009 to 31/12/2011)

OneProbe is deployed at eight tertiary institutions to perform around-the-clock collaborative measurement. The measurement is coordinated and managed by Planetopus, a system specifically designed for facilitating collaborative network measurement.

• "Neighbor-Cooperative Measurement of Network Path Quality", Proc. IEEE GLOBECOM, December 2010. [Paper]

• "Planetopus: A System for Facilitating Collaborative Network Monitoring", Proc. IEEE/IFIP IM (Application Session), May 2011.

Reliable and Accurate Bandwidth Measurement of Asymmetric Network Paths

(Funded by the Innovation Technology Fund, 1/3/2010 -31/8/2011)

In this project, we propose new capacity and available bandwidth measurement methods to overcome the existing limitations, particularly the problem of measuring the downlink path. The new methods are based on packet pairs and will be implemented in OneProbe.

• "A Minimum-Delay-Difference Method for Mitigating Cross-Traffic Impact on Capacity Measurement", Proc. ACM CoNext, December 2009. [Paper]

Uncooperative Measurement and Monitoring of Internet Path Quality with Applications

(Funded by the Innovation and Technology Commission, 1/9/2008 to 28/2/2010)

In this project, we design and implement a novel measurement method based on TCP data channel. Besides the advantage of uncooperative measurement, the new method could use a single probe to measure multiple path metrics, including forward-path and reverse-path packet loss, packet reordering, capacity, and jitter; and per-packet round-trip time.

• "Design and Implementation of TCP Data Probes for Reliable and Metric-Rich Network Path Monitoring", Proc. USENIX Annual Tech. Conf., June 2009. [Paper]

• "Sampling TCP Data-Path Quality with TCP Data Probes", Proc. PFLDNeT, May 2009. [Paper]

Loss pair measurement in the Internet

We implement new methods in OneProbe to measure all possible loss pairs in Internet paths. We conducted loss-pair measurement over 88 Internet paths. Being the first set of loss-pair measurement, we obtained a number of original results, such as prevalence of loss pairs, distribution of different types of loss pairs, and effect of route change on the paths’ congestion state.

• "Measurement of Loss Pairs in Network Paths", Proc. ACM/USENIX IMC, November 2010. [Paper]