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Analysis of point-to-point packet delay in an operational network | IEEE Conference Publication | IEEE Xplore
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Analysis of point-to-point packet delay in an operational network


Abstract:

We perform a detailed analysis of point-to-point packet delay in an operational tier-1 network. The point-to-point delay is the time between a packet entering a router in...Show More

Abstract:

We perform a detailed analysis of point-to-point packet delay in an operational tier-1 network. The point-to-point delay is the time between a packet entering a router in one PoP (an ingress point) and its leaving a router in another PoP (an egress point). It measures the one-way delay experienced by packets from an ingress point to an egress point across an ISP's network and provides the most basic information regarding the delay performance of the ISP's network. Using packet traces captured in the operational network, we obtain precise point-to-point packet delay measurements and analyze the various factors affecting them. Through a simple, step-by-step, systematic methodology and careful data analysis, we identify the major network factors that contribute to point-to-point packet delay and characterize their effect on the network delay performance. Our findings are: 1) delay distributions vary greatly in shape, depending on the path and link utilization; 2) after constant factors dependent only on the path and packet size are removed, the 99th percentile variable delay remains under 1 ms over several hops and under link utilization below 90% on a bottleneck; 3) a very small number of packets experience very large delay in short bursts.
Published in: IEEE INFOCOM 2004
Date of Conference: 07-11 March 2004
Date Added to IEEE Xplore: 22 November 2004
Print ISBN:0-7803-8355-9
Print ISSN: 0743-166X
Conference Location: Hong Kong, China

References

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