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J. Fabini, T. Zseby, M. Hirschbichler:
"Representative Delay Measurements (RDM): Facing the Challenge of Modern Networks";
Talk: ValueTools 2014, Bratislava, Slovakia; 12-09-2014 - 12-11-2014; in: "Proceedings of the 8th International Conference on Performance Evaluation Methodologies and Tools, ValueTools '14", ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering), (2014), ISBN: 978-1-63190-057-0; 8 pages.

Network access technologies have evolved significantly in the last years. They deploy novel mechanisms like reactive capacity allocation and time-slotted operation to optimize overall network capacity. From a single node's perspective, such optimizations decrease network determinism and measurement repeatability. Evolving application fields like machine to machine (M2M) communications or real-time gaming often have strict real-time requirements to operate correctly.
Highly accurate delay measurements are necessary to monitor network compliance with application demands or to detect deviations of normal network behavior, which may be caused by network failures, misconfigurations or attacks.
This paper analyzes factors that challenge active delay measurements in modern networks. It introduces the Representative Delay Measurement tool (RDM) that addresses these factors and proposes solutions that conform to requirements of the recently published RFC7312. Delay measurement results acquired using RDM in live networks confirm that advanced measurement methods can significantly improve the quality of measurement samples by isolating systematic network behavior. The resulting high-quality samples are one
prerequisite for accurate statistics that support proper operation of subsequent algorithms and applications.

Network access technologies have evolved significantly in the last years. They deploy novel mechanisms like reactive capacity allocation and time-slotted operation to optimize overall network capacity. From a single node's perspective, such optimizations decrease network determinism and measurement repeatability. Evolving application fields like machine to machine (M2M) communications or real-time gaming often have strict real-time requirements to operate correctly.
Highly accurate delay measurements are necessary to monitor network compliance with application demands or to detect deviations of normal network behavior, which may be caused by network failures, misconfigurations or attacks.
This paper analyzes factors that challenge active delay measurements in modern networks. It introduces the Representative Delay Measurement tool (RDM) that addresses these factors and proposes solutions that conform to requirements of the recently published RFC7312. Delay measurement results acquired using RDM in live networks confirm that advanced measurement methods can significantly improve the quality of measurement samples by isolating systematic network behavior. The resulting high-quality samples are one
prerequisite for accurate statistics that support proper operation of subsequent algorithms and applications.

measurements, networks, delay, one-way delay, real-time, anomaly, repeatability, timing, HSPA, LTE

http://dx.doi.org/10.4108/icst.Valuetools.2014.258181

http://publik.tuwien.ac.at/files/PubDat_233247.pdf