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Publications (10 of 31) Show all publications
Abrahamsson, H., Ben Abdesslem, F., Ahlgren, B., Brunstrom, A., Marsh, I. & Björkman, M. (2018). Connected Vehicles in Cellular Networks: Multi-access versus Single-access Performance. In: : . Paper presented at 2nd Workshop on Mobile Network Measurement (MNM’18). , Article ID 8506559.
Open this publication in new window or tab >>Connected Vehicles in Cellular Networks: Multi-access versus Single-access Performance
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2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Connected vehicles can make roads traffic safer andmore efficient, but require the mobile networks to handle timecriticalapplications. Using the MONROE mobile broadbandmeasurement testbed we conduct a multi-access measurementstudy on buses. The objective is to understand what networkperformance connected vehicles can expect in today’s mobilenetworks, in terms of transaction times and availability. The goalis also to understand to what extent access to several operatorsin parallel can improve communication performance.In our measurement experiments we repeatedly transfer warningmessages from moving buses to a stationary server. Wetriplicate the messages and always perform three transactionsin parallel over three different cellular operators. This creates adataset with which we can compare the operators in an objectiveway and with which we can study the potential for multi-access.In this paper we use the triple-access dataset to evaluate singleaccessselection strategies, where one operator is chosen for eachtransaction. We show that if we have access to three operatorsand for each transaction choose the operator with best accesstechnology and best signal quality then we can significantlyimprove availability and transaction times compared to theindividual operators. The median transaction time improves with6% compared to the best single operator and with 61% comparedto the worst single operator. The 90-percentile transaction timeimproves with 23% compared to the best single operator andwith 65% compared to the worst single operator.

National Category
Communication Systems
Identifiers
urn:nbn:se:ri:diva-34311 (URN)10.23919/TMA.2018.8506559 (DOI)2-s2.0-85057241219 (Scopus ID)
Conference
2nd Workshop on Mobile Network Measurement (MNM’18)
Available from: 2018-07-30 Created: 2018-07-30 Last updated: 2019-01-07Bibliographically approved
Abrahamsson, H., Ben Abdesslem, F., Ahlgren, B., Björkman, M., Brunstrom, A. & Marsh, I. (2018). Selecting Operator in 3G/4G Networks for Time-Critical C-ITS Applications. In: : . Paper presented at 14th Swedish National Computer Networking Workshop (SNCNW 2018).
Open this publication in new window or tab >>Selecting Operator in 3G/4G Networks for Time-Critical C-ITS Applications
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2018 (English)Conference paper, Published paper (Refereed)
National Category
Communication Systems
Identifiers
urn:nbn:se:ri:diva-34312 (URN)
Conference
14th Swedish National Computer Networking Workshop (SNCNW 2018)
Available from: 2018-07-30 Created: 2018-07-30 Last updated: 2019-01-22Bibliographically approved
Marsh, I. (2017). A lightweight measurement platform for home internet monitoring. In: 2017 IFIP Networking Conference, IFIP Networking 2017 and Workshops: . Paper presented at 2017 IFIP Networking Conference and Workshops, IFIP Networking 2017, 12 June 2017 through 16 June 2017.
Open this publication in new window or tab >>A lightweight measurement platform for home internet monitoring
2017 (English)In: 2017 IFIP Networking Conference, IFIP Networking 2017 and Workshops, 2017Conference paper, Published paper (Refereed)
Abstract [en]

CheesePi is a lightweight measurement platform with the goal of performing active measurements directly from within users' homes. As an always on device, it provides better context on the network state, than those available from browser interaction (Speedtest, etc.) In this demonstration, we will show the frontend of CheesePi and how we incorporate data from several sources around Sweden into a dashboard. A testbed of CheesePi nodes has been deployed, where we have conducted several tests. The presentation will highlight how to make unbiased and neutral measurements of the telecommunications infrastructure (Table III). Measurements are of sufficient quality to be useful by an operator, plus requirements mandated by academia [3], regulatory bodies [1] and the IETF [4]. © 2017 IFIP.

Keywords
Active measurement, Browser interaction, Internet monitoring, Measurements of, Network state, Regulatory bodies, Telecommunications infrastructures
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-34466 (URN)10.23919/IFIPNetworking.2017.8264886 (DOI)2-s2.0-85050540208 (Scopus ID)9783901882944 (ISBN)
Conference
2017 IFIP Networking Conference and Workshops, IFIP Networking 2017, 12 June 2017 through 16 June 2017
Available from: 2018-08-13 Created: 2018-08-13 Last updated: 2018-08-15Bibliographically approved
Marsh, I. (2017). CheesePi: Research, results, and the regulator. In: ANRW 2017 - Proceedings of the Applied Networking Research Workshop, Part ofIETF-99 Meeting: . Paper presented at 2017 Applied Networking Research Workshop, ANRW 2017, 15 July 2017 (pp. 7-12).
Open this publication in new window or tab >>CheesePi: Research, results, and the regulator
2017 (English)In: ANRW 2017 - Proceedings of the Applied Networking Research Workshop, Part ofIETF-99 Meeting, 2017, p. 7-12Conference paper, Published paper (Refereed)
Abstract [en]

In October 2015 we presented CheesePi at the Research and Applications of Internet Measurements (RAIM) workshop in Yokohama, Japan. In this followup paper, 18 months on, we present our findings. These range from simple round trip delay measurements to entire quality campaigns over several weeks. A significant portion of the research has been done in conjunction with the Swedish regulator, which we bring to the fore. CheesePi is a lightweight platform with the goal of performing measurements from within users' homes. Since the goal is to measure Internet quality delivered by ISPs, measurement fairness is of prime concern. This paper covers the regulator's demands, ISPs feedback, our research interests, the users' needs of nearly two years work.

Keywords
Home networking, Network measurements, Regulation, Internet measurement, Network measurement, Research and application, Research interests, Round trip delay, Yokohama, Japan, Internet service providers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33206 (URN)10.1145/3106328.3106337 (DOI)2-s2.0-85027716193 (Scopus ID)9781450351089 (ISBN)
Conference
2017 Applied Networking Research Workshop, ANRW 2017, 15 July 2017
Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2018-08-15Bibliographically approved
Bjurling, B., Kreuger, P. & Marsh, I. (2017). Data Readiness for BADA: BADA main study 1, FFI/Vinnova grant 2015-00677.
Open this publication in new window or tab >>Data Readiness for BADA: BADA main study 1, FFI/Vinnova grant 2015-00677
2017 (English)Report (Other academic)
Series
SICS Technical Report, ISSN 1100-3154 ; T2017:08
National Category
Computer Sciences
Identifiers
urn:nbn:se:ri:diva-32974 (URN)
Funder
VINNOVA
Available from: 2018-01-03 Created: 2018-01-03 Last updated: 2018-08-15Bibliographically approved
McNamara, L. & Marsh, I. (2015). CheesePi: A Raspberry Pi based measurement platform (8ed.). In: : . Paper presented at Research and Applications of Internet Measurements (RAIM).
Open this publication in new window or tab >>CheesePi: A Raspberry Pi based measurement platform
2015 (English)Conference paper, Published paper (Refereed)
Abstract [en]

We aim to to objectively characterise the service users experience from their home Internet connections. The attributes of an Internet connection (e.g., bandwidth and loss rate) dictate the service quality that can be achieved over it. American video use is increasing rapidly with 70% of broadband users under the age of 35 getting some of their TV from online sources. Measurement of such connections is crucial, their characterisation is useful not only for human users (so people know what service they can receive) but also for the users’ devices for adaptive behaviour. Furthermore, large-scale characterisation data of individual connections can be collated into a characterisation of the whole network. In this paper we will present a distributed measurement system that we have built and the choices that comprise its design.

National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-24487 (URN)
Conference
Research and Applications of Internet Measurements (RAIM)
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-08-15Bibliographically approved
Marsh, I. (2012). VANET communication: A traffic flow approach (8ed.). In: : . Paper presented at PIMRC (pp. 1043-1048).
Open this publication in new window or tab >>VANET communication: A traffic flow approach
2012 (English)Conference paper, Published paper (Refereed)
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-24110 (URN)
Conference
PIMRC
Projects
CNS
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-08-15Bibliographically approved
Filippini, I., Malandrino, F., Dan, G., Cesana, M., Casetti, C. & Marsh, I. (2011). Non-cooperative RSU deployment in vehicular networks (11ed.). In: : . Paper presented at WONS (pp. 79-82).
Open this publication in new window or tab >>Non-cooperative RSU deployment in vehicular networks
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2011 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This work considers the issue of distributing con- tents to vehicles through roadside communication infrastructure. Within this scenario, this work studies the dynamics of infras- tructure deployment by using game theoretic tools. A strategic game is used to model the case in which the operators perform their deployment decisions concurrently, whereas an extensive game is used to study the dynamics in case one operator is the deployment leader and moves first. The equilibria of the aforementioned games are then assessed as a function of several parameters (nominal infrastructure capacity, interference, vehicle flows). Simulations are used to validate the analytical findings.

National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-24111 (URN)10.1109/WONS.2012.6152243 (DOI)
Conference
WONS
Projects
CNS
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-08-15Bibliographically approved
Marsh, I. (2009). Quality aspects of Internet telephony (15ed.). (Doctoral dissertation). Stockholm, Sweden
Open this publication in new window or tab >>Quality aspects of Internet telephony
2009 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

Internet telephony has had a tremendous impact on how people communicate. Many now maintain contact using some form of Internet telephony. Therefore the motivation for this work has been to address the quality aspects of real-world Internet telephony for both fixed and wireless telecommunication. The focus has been on the quality aspects of voice communication, since poor quality leads often to user dissatisfaction. The scope of the work has been broad in order to address the main factors within IP-based voice communication. The first four chapters of this dissertation constitute the background material. The first chapter outlines where Internet telephony is deployed today. It also motivates the topics and techniques used in this research. The second chapter provides the background on Internet telephony including signalling, speech coding and voice Internetworking. The third chapter focuses solely on quality measures for packetised voice systems and finally the fourth chapter is devoted to the history of voice research. The appendix of this dissertation constitutes the research contributions. It includes an examination of the access network, focusing on how calls are multiplexed in wired and wireless systems. Subsequently in the wireless case, we consider how to handover calls from 802.11 networks to the cellular infrastructure. We then consider the Internet backbone where most of our work is devoted to measurements specifically for Internet telephony. The applications of these measurements have been estimating telephony arrival processes, measuring call quality, and quantifying the trend in Internet telephony quality over several years. We also consider the end systems, since they are responsible for reconstructing a voice stream given loss and delay constraints. Finally we estimate voice quality using the ITU proposal PESQ and the packet loss process. The main contribution of this work is a systematic examination of Internet telephony. We describe several methods to enable adaptable solutions for maintaining consistent voice quality. We have also found that relatively small technical changes can lead to substantial user quality improvements. A second contribution of this work is a suite of software tools designed to ascertain voice quality in IP networks. Some of these tools are in use within commercial systems today.

Place, publisher, year, edition, pages
Stockholm, Sweden: , 2009. p. 230 Edition: 15
Series
SICS dissertation series, ISSN 1101-1335 ; 51
Series
ISRN KTH/EE–09/025–SE
Keywords
VoIP, Internet telephony
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-23578 (URN)978-91-7415-313-2 (ISBN)
Projects
Real-time routerVinnova SIBED
Note

Also identified as KTH publication TRITA-EE 2009:025

Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-08-15Bibliographically approved
Leister, W., Sutinen, T., Boudko, S., Marsh, I., Griwodz, C. & Halvorsen, P. (2008). An architecture for adaptive multimedia streaming to mobile nodes (1ed.). In: Proceedings of the 6th International Conference on Advances in Mobile Computing and Multimedia: . Paper presented at 6th International Conference on Advances in Mobile Computing and Multimedia, 24-26 November 2008, Linz, Austria.
Open this publication in new window or tab >>An architecture for adaptive multimedia streaming to mobile nodes
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2008 (English)In: Proceedings of the 6th International Conference on Advances in Mobile Computing and Multimedia, 2008, 1, , p. 10Conference paper, Published paper (Refereed)
Abstract [en]

We describe the adimus architecture which addresses the problem of maintaining the subjective quality of multimedia streaming for a mobile user. In contrast to other works, the entire end-to-end path of the video stream is considered. Adaptation mechanisms for maintaining quality include time-critical handovers, overlay routing and network estimation techniques. Our architecture is built on overlays that provides the necessary functionality for a video streaming service. The paper highlights the key components that ADIMUS advocates to support quality streaming from server to mobile client.

Publisher
p. 10
Keywords
video adaptation, multi-access, overlay networks, user-perceived QoS
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-22934 (URN)
Conference
6th International Conference on Advances in Mobile Computing and Multimedia, 24-26 November 2008, Linz, Austria
Projects
ADIMUS
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-08-15Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8338-5513

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