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Nordström, Erik
Publications (10 of 21) Show all publications
Nordström, E., Gunningberg, P. & Tschudin, C. (2011). Robust and flexible Internet connectivity for mobile ad hoc networks. Ad hoc networks, 9(1), 1-15
Open this publication in new window or tab >>Robust and flexible Internet connectivity for mobile ad hoc networks
2011 (English)In: Ad hoc networks, ISSN 1570-8705, E-ISSN 1570-8713, Vol. 9, no 1, p. 1-15Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2011
Keywords
ad hoc networks, gateways, routing, mobility
National Category
Computer and Information Sciences
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-134813 (URN)10.1016/j.adhoc.2010.04.003 (DOI)000282206400001 ()
Available from: 2010-12-02 Created: 2010-12-01 Last updated: 2018-01-12Bibliographically approved
Bjurefors, F., Gunningberg, P., Nordström, E. & Rohner, C. (2010). Interest dissemination in a searchable data-centric opportunistic network. In: Proc. European Wireless Conference: EW 2010 (pp. 889-895). Piscataway, NJ: IEEE
Open this publication in new window or tab >>Interest dissemination in a searchable data-centric opportunistic network
2010 (English)In: Proc. European Wireless Conference: EW 2010, Piscataway, NJ: IEEE , 2010, p. 889-895Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2010
Keywords
Haggle data dissemination decisions, data-centric network, information delivery, interest dissemination, knowledge dissemination, network architecture, network performance, opportunistic communication, performance evaluation, searchable data-centric opportunistic network, computer networks, information dissemination, middleware, performance evaluation
National Category
Computer and Information Sciences
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-136395 (URN)10.1109/EW.2010.5483529 (DOI)978-1-4244-5999-5 (ISBN)
Projects
Haggle
Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2018-01-12
Nordström, E., Gunningberg, P. & Rohner, C. (2009). A Search-based Network Architecture for Mobile Devices.
Open this publication in new window or tab >>A Search-based Network Architecture for Mobile Devices
2009 (English)Report (Other academic)
Series
Technical report / Department of Information Technology, Uppsala University, ISSN 1404-3203 ; 2009-003
National Category
Computer Sciences
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-89269 (URN)
Projects
Haggle
Available from: 2009-02-10 Created: 2009-02-10 Last updated: 2018-01-13Bibliographically approved
Nordström, E., Gunningberg, P. & Rohner, C. (2009). Haggle: A Data-centric Network Architecture for Mobile Devices. Paper presented at 10th ACM International Symposium on Mobile Ad Hoc Networking and Computing: Mobihoc Wireless S3 Workshop.
Open this publication in new window or tab >>Haggle: A Data-centric Network Architecture for Mobile Devices
2009 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Delay-tolerant and opportunistic networks relax the traditional assumption of end-to-end connectivity. Such networks are therefore suitable for content dissemination in sparsely connected regions of the world, and for complementing existing infrastructure by operating cost-free, high bandwidth, albeit high latency, content delivery services.

In this work we argue, however, that content dissemination in the above contexts requires us to revisit delay-tolerant communication at the architectural level, looking at multiple issues such as naming and addressing, congestion control and application interfaces. We propose a new architecture, called Haggle, that leverages the principles of search, as known from desktop operating systems and the Web, in order to achieve truly data-centric communication. Searching is naturally data-centric and embeds principles, such as ranking, that can be used to bind data to interested receivers and to prioritize the data to send during node encounters. We herein give an overview of the Haggle architecture and its basic design.

National Category
Computer Sciences
Identifiers
urn:nbn:se:uu:diva-105104 (URN)
Conference
10th ACM International Symposium on Mobile Ad Hoc Networking and Computing: Mobihoc Wireless S3 Workshop
Projects
Haggle
Note
Invited talkAvailable from: 2009-06-02 Created: 2009-06-01 Last updated: 2018-01-13Bibliographically approved
Nordström, E., Gunningberg, P., Rohner, C. & Wibling, O. (2007). A Cross-Environment Study of Routing Protocols for Wireless Multi-hop Networks.
Open this publication in new window or tab >>A Cross-Environment Study of Routing Protocols for Wireless Multi-hop Networks
2007 (English)Report (Other academic)
Abstract [en]

We study ad hoc routing protocol mechanisms that impact the performance during and after periods of connectivity change. Our evaluation procedure is facilitated by using a structured and tool-supported approach, combining real world experiments with simulation and emulation. This method enables us to find performance-critical time regions in our traces. Our analysis shows that performance is largely determined by how accurately a protocol senses connectivity in these regions. Inaccurate sensing can seriously affect the performance of the protocol, even after the critical regions. We identify three significant problems with sensing that we call Self-interference, TCP backlashing and Link cache poisoning. We discuss their effect on the design of sensing mechanisms in routing protocols and suggest how the protocols can be made more robust.

Publisher
p. 10
Series
IT Technical Reports, ISSN 1404-3203 ; 2007-016
National Category
Computer and Information Sciences
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-12835 (URN)
Available from: 2008-01-17 Created: 2008-01-17 Last updated: 2018-01-12Bibliographically approved
Nordström, E., Gunningberg, P., Rohner, C. & Wibling, O. (2007). Evaluating Wireless Multi-hop Networks Using a Combination of Simulation, Emulation, and Real World Experiments. In: Pering, Agarwal, Corner (Ed.), Proceedings of the 1st international workshop on System evaluation for mobile platforms (MobiEval'07). Paper presented at MobiEval '07 Mobisys 2007 Workshop on System Evaluation for Mobile Platforms: Metrics, Methods, and Tools (pp. 29-34). New York: ACM Association for Computing Machinery
Open this publication in new window or tab >>Evaluating Wireless Multi-hop Networks Using a Combination of Simulation, Emulation, and Real World Experiments
2007 (English)In: Proceedings of the 1st international workshop on System evaluation for mobile platforms (MobiEval'07) / [ed] Pering, Agarwal, Corner, New York: ACM Association for Computing Machinery , 2007, p. 29-34Conference paper, Published paper (Refereed)
Abstract [en]

Mobile ad hoc networks suffer from complex interactions between protocols on different levels. To identify and explain anomalies found in real world experiments we propose to combine real world testing with simulation and emulation. By inspecting the differences in the results obtained using the three evaluation methods we can efficiently identify when anomalies occur and get a hint about where to further investigate. Our approach has proved to be valuable in an extensive comparison of the routing protocols AODV, DSR, and OLSR. The study resulted in two gigabytes of log data that required an efficient and structured method to isolate important time regions for further manual analysis. We discuss our approach and present some key findings.

Place, publisher, year, edition, pages
New York: ACM Association for Computing Machinery, 2007
Keywords
ad hoc networks, test-bed, mobility, routing, measurements
National Category
Computer and Information Sciences
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-77845 (URN)10.1145/1247721.1247728 (DOI)978-1-59593-762-9 (ISBN)
Conference
MobiEval '07 Mobisys 2007 Workshop on System Evaluation for Mobile Platforms: Metrics, Methods, and Tools
Projects
Haggle
Available from: 2008-03-17 Created: 2008-03-17 Last updated: 2018-01-13Bibliographically approved
Nordström, E., Diot, C., Gass, R. & Gunningberg, P. (2007). Experiences from measuring human mobility using Bluetooth inquiring devices. In: In Proceedings of the 1st international In Proceedings of the 1stinternational workshop on System evaluation for mobile platforms (MobiEval'07). Paper presented at 1st international Workshop on System evaluation for mobile platforms MobiEval'07 (pp. 15-20). New York: ACM Press
Open this publication in new window or tab >>Experiences from measuring human mobility using Bluetooth inquiring devices
2007 (English)In: In Proceedings of the 1st international In Proceedings of the 1stinternational workshop on System evaluation for mobile platforms (MobiEval'07), New York: ACM Press , 2007, p. 15-20Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
New York: ACM Press, 2007
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-141146 (URN)10.1145/1247721.1247725 (DOI)978-1-59593-762-9 (ISBN)
Conference
1st international Workshop on System evaluation for mobile platforms MobiEval'07
Projects
Haggle
Available from: 2011-01-11 Created: 2011-01-11 Last updated: 2011-01-18
Nordström, E., Gunningberg, P., Rohner, C. & Wibling, O. (2006). Comparing Simulation, Emulation, and Real-World Experimental Results in Mobile Ad hoc Networks. In: 6th Scandinavian Workshop on Wireless Ad-hoc Networks (ADHOC'06).
Open this publication in new window or tab >>Comparing Simulation, Emulation, and Real-World Experimental Results in Mobile Ad hoc Networks
2006 (English)In: 6th Scandinavian Workshop on Wireless Ad-hoc Networks (ADHOC'06), 2006Conference paper, Published paper (Refereed)
Abstract [en]

We compare the major MANET protocols, AODV, DSR and OLSR, using a set of the same scenarios recreated in simulation, emulation and real world. The purpose of this is twofold:

1. To explore the utility of simulation and emulation in direct relation to the real world in the area of mobile ad hoc networks. We explore potential discrepancies in the results that could either improve the confidence in previous research or to indicate the need for deeper exploration. To our knowledge, no previous work has done this in the consistent manner that we have. Our work may also function as a validation to previous findings in simulation and emulation.

2. To compare, side-by-side, the performance of the major MANET routing protocols to better understand the trade-offs in the design choices of the different protocols and how they can complement each other to improve MANET routing. The MANET research area has reached a level of maturity, both in terms of protocol specifications and implementations, where we believe this type of comparison is necessary to further the development and standardization of MANET technology. In this paper we will concentrate on the first aspect of exploring potential discrepancies in the results. Significant differences have been identified in delay variation, packet loss, and interaction with transport layer protocols.

Keywords
ad hoc network, experiment, simulation
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-80463 (URN)
Available from: 2008-04-25 Created: 2008-04-25 Last updated: 2011-01-18
Nordström, E., Gunningberg, P. & Lundgren, H. (2005). A Testbed and Methodology for Experimental Evaluation of Mobile Ad hoc Networks. In: Proceedings of the First International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM).
Open this publication in new window or tab >>A Testbed and Methodology for Experimental Evaluation of Mobile Ad hoc Networks
2005 (English)In: Proceedings of the First International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM), 2005Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-97368 (URN)
Available from: 2008-05-22 Created: 2008-05-22 Last updated: 2012-05-29Bibliographically approved
Nordström, E., Gunningberg, P. & Lundgren, H. (2005). A Testbed and Methodology for Experimental Evaluation of Wireless Mobile Ad hoc Networks. In: Proceedings of The First International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM). Paper presented at 1 st International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 23-25 February 2005, Trento, Italy. IEEE Computer Society
Open this publication in new window or tab >>A Testbed and Methodology for Experimental Evaluation of Wireless Mobile Ad hoc Networks
2005 (English)In: Proceedings of The First International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM), IEEE Computer Society, 2005Conference paper, Published paper (Refereed)
Abstract [en]

Wireless mobile ad hoc network experimentation is subjected to stochastic factors from the radio environment and node mobility. To achieve test repeatability and result reproducibility such stochastic factors need to be controlled or assessed in order to obtain conclusive results. This has implications on the design of testbeds. We present a methodology that addresses repeatability and describe how it has guided us in the design of our Ad hoc Protocol Evaluation (APE) testbed. Finally, by using APE, we present side-by-side routing protocol comparison results and show a radio phenomena that is not visible in simulations.

Place, publisher, year, edition, pages
IEEE Computer Society, 2005
Series
IEEE Computer Society
National Category
Engineering and Technology
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-92669 (URN)0-7695-2219-X (ISBN)
Conference
1 st International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 23-25 February 2005, Trento, Italy
Projects
SCANET
Available from: 2005-02-28 Created: 2005-02-28 Last updated: 2013-03-22Bibliographically approved
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