Delay metrics and delay characteristics: A study of four Swedish HSDPA+ and LTE networks
2015 (English)In: 2015 European Conference on Networks and Communications (EuCNC), IEEE conference proceedings, 2015, 234-238 p.Conference paper (Refereed)
Network delays and user perceived latencies are of major importance in many applications in cellular networks. Delays can be measured with multiple approaches and at different protocol layers. This work involves a detailed examination of several delay metrics from a network, transport, and application perspective. The study explores base delay as well as latency under load, capturing also the effect of buffering. The examination is based on a comprehensive active measurement campaign performed in the networks of four Swedish operators. The results show that the delay captured by different metrics can vary significantly, with delay captured from the TCP three-way-handshake and adaptive ping measurements giving the most consistent results for base network delay in our measurements. As expected, when background traffic is introduced measured delay increases by an order of magnitude due to buffering in the network, highlighting the importance of also capturing latency under load when describing network performance. Finally, using an analytic model of flow completion time, we show that well-selected network measurements can provide a good prediction of higher layer delay performance.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2015. 234-238 p.
Cellular networks, Delay metrics, HSDPA, LTE, 4G, Performance measurements, Completion time
Communication Systems Telecommunications Computer Science
Research subject Computer Science
IdentifiersURN: urn:nbn:se:kau:diva-37756DOI: 10.1109/EuCNC.2015.7194075ISI: 000380399400047ISBN: 978-1-4673-7359-3OAI: oai:DiVA.org:kau-37756DiVA: diva2:848947
2015 European Conference on Networks and Communications (EuCNC), June 29 2015-July 2 2015, Paris, France
FunderKnowledge Foundation, 20140037.SE (The Internet Infrastructure Foundation), IFv2014-0135