Convergence Technologies for 3G Networks: IP, UMTS,EGPRS and ATM
Convergence Technologies for 3G Networks: IP, UMTS,EGPRS and ATM
Large-Scale RTT Measurements from an Operational UMTS/GPRS Network
WICON '05 Proceedings of the First International Conference on Wireless Internet
An Enhanced Buffer Management Scheme for Multimedia Traffic in HSDPA
NGMAST '07 Proceedings of the The 2007 International Conference on Next Generation Mobile Applications, Services and Technologies
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
Experimental analysis and characterization of packet delay in UMTS networks
NEW2AN'06 Proceedings of the 6th international conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking
Traffic analysis at short time-scales: an empirical case study from a 3G cellular network
IEEE Transactions on Network and Service Management
Measurement and analysis of single-hop delay on an IP backbone network
IEEE Journal on Selected Areas in Communications
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In this paper we investigate the dynamics of one-way delays in an operational mobile core network. Our ultimate motivation is to develop anomaly detection schemes for the packet delay process in order to reveal network and equipment problems. This requires an online measurement system capable of collecting and processing delay statistics in real-time. We present an experimental deployment of such a measurement system in an operational General Packet Radio System (GPRS)/Universal Mobile Telecommunications System (UMTS) network and elaborate on some practical implementation issues. We present some measurement results for the Serving GPRS Support Nodes (SGSN) of UMTS and GPRS. We find that the delay at a UMTS-SGSN is moderately influenced by user mobility, while flow control and user mobility are considerably impacting the delay process at a GPRS-SGSN. We show that simple summary indicators can be extracted from the delay statistics, as a combination of percentiles and threshold-crossing probabilities. Such indicators can be used for the purpose of detecting abnormal delay deviations, pointing to problems in the network equipments.