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Analysis of Network Latency in Virtualized Environments
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science. (DIStributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0001-7529-9324
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0001-7311-9334
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science. (DIStributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0001-9194-010X
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science. (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0003-4147-9487
2016 (English)In: Global Communications Conference (GLOBECOM), 2016 IEEE, IEEE, 2016Conference paper, Published paper (Refereed)
Abstract [en]

Virtualization is central to cloud computing systems. It abstracts computing resources to be shared among multiple virtual machines (VMs) that can be easily managed to run multiple applications and services. To benefit from the advantages of cloud computing, and to cope with increasing traffic demands, telecom operators have adopted cloud computing. Telecom services and applications are, however, characterized by real-time responsiveness, strict end-to-end latency, and high reliability. Due to the inherent overhead of virtualization, the network performance of applications and services can be degraded. To improve the performance of emerging applications and services that demand stringent end-to-end latency, and to understand the network performance bottleneck of virtualization, a comprehensive performance measurement and analysis is required. To this end, we conducted controlled and detailed experiments to understand the impact of virtualization on end-to-end latency and the performance of transport protocols in a virtualized environment. We also provide a packet delay breakdown in the virtualization layer which helps in the optimization of hypervisor components. Our experimental results indicate that the end-to-end latency and packet delay in the virtualization layer are increased with co-located VMs.

Place, publisher, year, edition, pages
IEEE, 2016.
Series
IEEE Global Communications Conference, ISSN 2334-0983
Keyword [en]
cloud networking in 5G, network functions virtualization (NFV), cloud traffic characterization and measurements, quality-of-service and quality-of-experience in cloud services and networking, cloud network platforms and experimentations
National Category
Engineering and Technology Telecommunications
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-44344DOI: 10.1109/GLOCOM.2016.7841603ISI: 000401963300120ISBN: 978-1-5090-1328-9 (print)OAI: oai:DiVA.org:kau-44344DiVA, id: diva2:945847
Conference
IEEE Global Communications Conference, Exhibitions and Industry Forum (GLOBECOM), Washington D. C., U.S.A., 4-8 December 2016.
Projects
High Quality Networked Services in a Mobile World (HITS)
Funder
Knowledge Foundation
Available from: 2016-07-04 Created: 2016-07-04 Last updated: 2018-04-30Bibliographically approved
In thesis
1. Telecom Networks Virtualization: Overcoming the Latency Challenge
Open this publication in new window or tab >>Telecom Networks Virtualization: Overcoming the Latency Challenge
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Telecom service providers are adopting a Network Functions Virtualization (NFV) based service delivery model, in response to the unprecedented traffic growth and an increasing customers demand for new high-quality network services. In NFV, telecom network functions are virtualized and run on top of commodity servers. Ensuring network performance equivalent to the legacy non-virtualized system is a determining factor for the success of telecom networks virtualization. Whereas in virtualized systems, achieving carrier-grade network performance such as low latency, high throughput, and high availability to guarantee the quality of experience (QoE) for customer is challenging.

In this thesis, we focus on addressing the latency challenge. We investigate the delay overhead of virtualization by comprehensive network performance measurements and analysis in a controlled virtualized environment. With this, a break-down of the latency incurred by the virtualization and the impact of co-locating virtual machines (VMs) of different workloads on the end-to-end latency is provided. We exploit this result to develop an optimization model for placement and provisioning of the virtualized telecom network functions to ensure both the latency and cost-efficiency requirements.

To further alleviate the latency challenge, we propose a multipath transport protocol MDTCP, that leverage Explicit Congestion Notification (ECN) to quickly detect and react to an incipient congestion to minimize queuing delays, and achieve high network utilization in telecom datacenters.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2018. p. 28
Series
Karlstad University Studies, ISSN 1403-8099 ; 2018:24
Keyword
NFV, Telecom networks virtualization, latency, virtualization, cloud computing, network congestion, QoS
National Category
Computer Sciences
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-67243 (URN)978-91-7063-857-2 (ISBN)978-91-7063-952-4 (ISBN)
Presentation
2018-06-13, 21A342, Karlstad, 10:15 (English)
Opponent
Supervisors
Available from: 2018-05-23 Created: 2018-04-30 Last updated: 2018-05-23Bibliographically approved

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Brunström, AnnaGrinnemo, Karl-Johan

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