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Network-wide Measurement of TCP RTT in 2G Networks

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Title:Network-wide Measurement of TCP RTT in 2G Networks
Authors:Pfitzinger, Bernd
Baumann, Tommy
Emde, Andreas
Macos, Dragan
Jestädt, Thomas
Keywords:Wireless Networks
latency TCP/IP GSM
Date Issued:03 Jan 2018
Abstract:We analyze existing server-side log data of a large scale automatic toll system to measure the TCP round-trip-time (RTT) as experienced by the communication between the central system and the on-board units (OBUs) deployed for tolling heavy-goods vehicles. The RTT is estimated from passive monitoring by parsing server-side log files and aggregating fleet-wide statistics over time. Using this data we compare the characteristics of the four different types of OBU and the three GPRS (2G) networks used. We find the RTT data to be consistent with existing, smaller samples and extend the observed RTT range by an order of magnitude. The OBU types exhibit a markedly different behavior, most notably for long RTTs, and we find one of the 2G networks to -˜hum’ at 50 Hz and harmonics.
Pages/Duration:7 pages
Rights:Attribution-NonCommercial-NoDerivatives 4.0 International
Appears in Collections: Wireless Networks

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