Bottleneck detection in UMTS via TCP passive monitoring: a real case
CoNEXT '05 Proceedings of the 2005 ACM conference on Emerging network experiment and technology
Diagnosis of capacity bottlenecks via passive monitoring in 3G networks: An empirical analysis
Computer Networks: The International Journal of Computer and Telecommunications Networking
Towards Anomaly Detection in One-Way Delay Measurements for 3G Mobile Networks: A Preliminary Study
IPOM '08 Proceedings of the 8th IEEE international workshop on IP Operations and Management
Network-Wide Measurements of TCP RTT in 3G
TMA '09 Proceedings of the First International Workshop on Traffic Monitoring and Analysis
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
TCP aware link layer agent for seamless vertical handoff in the cellular/WLAN integrated network
IEEE Communications Letters
Dissecting 3G uplink delay by measuring in an operational HSPA network
PAM'11 Proceedings of the 12th international conference on Passive and active measurement
Micro- and macroscopic analysis of RTT variability in GPRS and UMTS networks
NETWORKING'06 Proceedings of the 5th international IFIP-TC6 conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems
TMA'10 Proceedings of the Second international conference on Traffic Monitoring and Analysis
First impressions on the state of cellular data connectivity in India
Proceedings of the 4th Annual Symposium on Computing for Development
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In this paper we present some observations about TCP RTT ascaptured in the live traffic of an operational GPRS/UMTS network.RTT samples are extracted from traces collected by passive monitoringthe Gn interfaces of one of the major providers in Austria, EU. Wecompare results for GPRS and UMTS, and expose some methodologicalissues involved in performing this type of analysis, for instance thepotential bias introduced by heavy users. We also explore thecorrelation of RTT with time-of-day. The primary motivation for this research is to gain a better understanding of the dominant causes that shape the behaviour and the distribution of RTT across the TCP connections that populate a GPRS/UMTS network. The results presented here are useful for the scientific community, for instance to set more realistic simulation scenarios for other research activities. In addition, RTT measurements as obtained by large-scale passive monitoring can be used in combination with other indicators to build a summary indicator of the performances experienced by the TCP users at the scale of the whole network, i.e. a global RTT-based KPI (Key Performance Indicator).