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  • 1.
    Mascherpa, Michele
    et al.
    KTH Royal Institute of Technology, Sweden.
    Haasler, Isabel
    École Polytechnique Fédérale de Lausanne, Switzerland.
    Ahlgren, Bengt
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Karlsson, Johan
    KTH Royal Institute of Technology, Sweden.
    Estimating pollution spread in water networks as a Schrödinger bridge problem with partial information2023In: European Journal of Control, ISSN 0947-3580, E-ISSN 1435-5671, article id 100846Article in journal (Refereed)
    Abstract [en]

    Incidents where water networks are contaminated with microorganisms or pollutants can result in a large number of infected or ill persons, and it is therefore important to quickly detect, localize and estimate the spread and source of the contamination. In many of today's water networks only limited measurements are available, but with the current internet of things trend the number of sensors is increasing and there is a need for methods that can utilize this information. Motivated by this fact, we address the problem of estimating the spread of pollution in a water network given measurements from a set of sensors. We model the water flow as a Markov chain, representing the system as a set of states where each state represents the amount of water in a specific part of the network, e.g., a pipe or a part of a pipe. Then we seek the most likely flow of the pollution given the expected water flow and the sensors observations. This is a large-scale optimization problem that can be formulated as a Schrödinger bridge problem with partial information, and we address this by exploiting the connection with the entropy regularized multimarginal optimal transport problem. The software EPANET is used to simulate the spread of pollution in the water network and will be used for testing the performance of the methodology. © 2023 The Author(s)

  • 2.
    Rabitsch, Alexander
    et al.
    Karlstads University, Sweden.
    Grinnemo, Karl Johan
    Karlstads University, Sweden.
    Brunstrom, Anna
    Karlstads University, Sweden.
    Abrahamsson, Henrik
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Ben Abdesslem, Fehmi
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Alfredsson, Stefan
    RISE Research Institutes of Sweden.
    Ahlgren, Bengt
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Utilizing Multi-Connectivity to Reduce Latency and Enhance Availability for Vehicle to Infrastructure Communication2022In: IEEE Transactions on Mobile Computing, ISSN 1536-1233, E-ISSN 1558-0660, Vol. 21, no 1, p. 352-365Article in journal (Refereed)
    Abstract [en]

    Cooperative Intelligent Transport Systems (C-ITS) enable information to be shared wirelessly between vehicles and infrastructure in order to improve transport safety and efficiency. Delivering C-ITS services using existing cellular networks offers both financial and technological advantages, not least since these networks already offer many of the features needed by C-ITS, and since many vehicles on our roads are already connected to cellular networks. Still, C-ITS pose stringent requirements in terms of availability and latency on the underlying communication system; requirements that will be hard to meet for currently deployed 3G, LTE, and early-generation 5G systems. Through a series of experiments in the MONROE testbed (a cross-national, mobile broadband testbed), the present study demonstrates how cellular multi-access selection algorithms can provide close to 100% availability, and significantly reduce C-ITS transaction times. The study also proposes and evaluates a number of low-complexity, low-overhead single-access selection algorithms, and shows that it is possible to design such solutions so that they offer transaction times and availability levels that rival those of multi-access solutions.

  • 3.
    Ahlgren, Bengt
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Grinnemo, Karl-Johan
    Karlstad University, Sweden.
    ZQTRTT: A Multipath Scheduler for Heterogeneous Traffic in ICNs Based on Zero Queueing Time Ratio2022In: ICN 2022 - Proceedings of the 2022 9th ACM Conference on Information-Centric Networking, Association for Computing Machinery, Inc , 2022Conference paper (Refereed)
    Abstract [en]

    Information-centric networks (ICNs) intrinsically support multipath transfer and thus have been seen as an exciting paradigm for IoT and edge computing, not least in the context of 5G mobile networks. One key to ICN's success in these and other networks that have to support a diverse set of services over a heterogeneous network infrastructure is to schedule traffic over the available network paths efficiently. This paper presents and evaluates ZQTRTT, a multipath scheduling scheme for ICN that load balances bulk traffic over available network paths and schedules latency-sensitive, non-bulk traffic to reduce its transfer delay. A new metric called zero queueing time (ZQT) ratio estimates path load and is used to compute forwarding fractions for load balancing. In particular, the paper shows through a simulation campaign that ZQTRTT can accommodate the demands of both latency-sensitive and-insensitive traffic as well as evenly distribute traffic over available network paths. 

  • 4.
    Hazra, Saptarshi
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Voigt, Thiemo
    RISE Research Institutes of Sweden, Digital Systems, Data Science.
    Ahlgren, Bengt
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Lu, Chenguang
    Ericsson Research, Sweden.
    Cederholm, Daniel
    Ericsson Research, Sweden.
    Patra, Gyanesh
    Ericsson Research, Sweden.
    Demo: Multi-Radio Access Technology IoT Gateway2020In: Proceedings of the 2020 International Conference on Embedded Wireless Systems and Networks, Junction Publishing , 2020, p. 189-191Conference paper (Other academic)
    Abstract [en]

    We present VGATE, a softwarised, multiple-RAT IoT gateway. The baseband of IEEE 802.15.4, LoRa and NB-IoT are implemented with software-defined radio in containers that can execute in an edge computing platform. The demo shows simultaneous multi-channel access and simultaneous execution of multiple RATs in a shared infrastructure.

  • 5.
    Ahlgren, Bengt
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Claesson, Åsa
    RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.
    Honfi, Daniel
    RISE Research Institutes of Sweden. Ramböll, Sweden.
    Kardeby, Victor
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Karoumi, Raid
    KTH Royal Institute of Technology, Sweden.
    Leander, John
    KTH Royal Institute of Technology, Sweden.
    Digitaliseringens möjligheter och utmaningar inom förvaltning och underhållsplanering av broar: Förstudie2020Report (Other academic)
    Abstract [en]

    Rapporten behandlar digitalisering – att införa ny digital teknik – i förvaltningsverksamheten av broar. Omfattningen är en förstudie med syftet att identifiera behovet av framtida forskning för en långsiktig utveckling av broförvaltningen. En grundläggande ansats var att en digitalisering ska minska behovet av kostsamma underhållsåtgärder men bibehålla en hög säkerhet för våra broar. Projektets mål var att samla information om digitala informationsmodeller som skapas under investeringsskedet, utvärdera överlämningen av digitala modeller till förvaltningsskedet, och värdera den eventuella nyttan med digital informationsinsamling för tillståndsbedömning och underhållsplanering. En viktig del av detta var beskrivningen av dagens förvaltningssystem och hur det skulle kunna utvecklas. Studierna har bedrivits genom en enkätundersökning med respondenter från konsultfirmor aktiva inom broprojektering, intervjuer med tekniska experter och litteratursökningar. Resultatet visar att projekteringen av broar idag huvudsakligen görs genom byggnads-informationsmodellering (BIM). Inriktningen är mot byggskedet där samordning och kommunikation bedöms vara de största nyttorna. Överlämningen till förvaltningen består dock av relationsritningar i formen av enkla ritningsfiler. Trots att Trafikverkets strategi för BIM beskriver att en informationsmodell bör leva kvar under hela brons livslängd, finns det tveksamheter huruvida en modell från projekteringen är lämplig som förvaltningsmodell. Istället lyfts andra metoder fram för att skapa en modell av det byggda utförandet. Till exempel optiska metoder för skanning och fotogrammetri. Förvaltningssystemen bör utvecklas med funktioner för att lagra och tillgängliggöra stora mängder digital information från sensorer maskinella inspektioner. Syftet är att minska osäkerheterna i det byggda utförandet och graden av nedbrytning, för att slutligen skapa ett bättre underlag för beslut om åtgärder. Ett framtida scenario är en digital tvilling som speglar den verkliga konstruktionen och uppdateras kontinuerligt genom sensordata. Gällande hårdvara för mätningar behöver sensorer och system utvecklas med avseende på energiförbrukning, energiskördning och underhållsåtgärder, t.ex. genom kombinationer av utbytbara komponenter med kort livslängd och andra delar med lång livslängd. Fiberoptiska sensorer visar på lovande egenskaper men utveckling behövs för att göra dem mer kostnadseffektiva i relation till konventionella sensorer.

    Download full text (pdf)
    fulltext
  • 6.
    Ahlgren, Bengt
    et al.
    RISE Research Institutes of Sweden, Digital Systems, Industrial Systems.
    Grinnemo, Karl-Johan
    Evaluation of the ZQTRTT latency-aware multipath scheduler2020Conference paper (Refereed)
  • 7.
    Ahlgren, Bengt
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Grinnemo, Karl-Johan
    Karlstad University, Sweden.
    Abrahamsson, Henrik
    RISE - Research Institutes of Sweden, ICT, SICS.
    Brunstrom, Anna
    Karlstad University, Sweden.
    Hurtig, Per
    Karlstad University, Sweden.
    Latency-aware Multipath Scheduling in Information-centric Networks2019In: Proceedings of the 15th Swedish National Computer Networking Workshop (SNCNW), 2019Conference paper (Other academic)
    Abstract [en]

    We present the latency-aware multipath scheduler ZQTRTT that takes advantage of the multipath opportunities in information-centric networking. The goal of the scheduler is to use the (single) lowest latency path for transaction-oriented flows, and use multiple paths for bulk data flows. A new estimator called zero queue time ratio is used for scheduling over multiple paths. The objective is to distribute the flow over the paths so that the zero queue time ratio is equal on the paths, that is, so that each path is ‘pushed’ equally hard by the flow without creating unwanted queueing. We make an initial evaluation using simulation that shows that the scheduler meets our objectives.

  • 8.
    Abrahamsson, Henrik
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ben Abdesslem, Fehmi
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ahlgren, Bengt
    RISE - Research Institutes of Sweden, ICT, SICS.
    Brunstrom, Anna
    Karlstad University, Sweden.
    Marsh, Ian
    RISE - Research Institutes of Sweden, ICT, SICS.
    Björkman, Mats
    Mälardalen University, Sweden.
    Connected Vehicles in Cellular Networks: Multi-access versus Single-access Performance2018Conference 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.

  • 9.
    Ahlgren, Bengt
    et al.
    RISE - Research Institutes of Sweden (2017-2019), ICT, SICS.
    Hurtig, Per
    Karlstad University, Sweden.
    Abrahamsson, Henrik
    RISE - Research Institutes of Sweden (2017-2019), ICT, SICS.
    Grinnemo, Karl-Johan
    Karlstad University, Sweden.
    Brunstrom, Anna
    Karlstad University, Sweden.
    ICN congestion control for wireless links2018Conference paper (Refereed)
    Abstract [en]

    Information-centric networking (ICN) with its design around named-based forwarding and in-network caching holds great promises to become a key architecture for the future Internet. Many proposed ICN hop-by-hop congestion control schemes assume a fixed and known link capacity, which rarely - if ever - holds true for wireless links. Firstly, we demonstrate that although these congestion control schemes are able to fairly well utilise the available wireless link capacity, they greatly fail to keep the delay low. In fact, they essentially offer the same delay as in the case with no hop-by-hop, only end-to-end, congestion control. Secondly, we show that by complementing these schemes with an easy-to-implement, packet-train capacity estimator, we reduce the delay to a level significantly lower than what is obtained with only end-to-end congestion control, while still being able to keep the link utilisation at a high level.

  • 10.
    Tanyingyong, Voravit
    et al.
    KTH Royal Institute of Technology, Sweden.
    Olsson, Robert
    KTH Royal Institute of Technology, Sweden.
    Hidell, Markus
    KTH Royal Institute of Technology, Sweden.
    Sjödin, Peter
    KTH Royal Institute of Technology, Sweden.
    Ahlgren, Bengt
    RISE - Research Institutes of Sweden, ICT, SICS.
    Implementation and Deployment of an Outdoor IoT-Based Air Quality Monitoring Testbed2018In: 2018 IEEE Global Communications Conference, GLOBECOM 2018 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2018Conference paper (Refereed)
    Abstract [en]

    This paper presents an outdoor IoT-based air quality monitoring testbed deployed in the city of Uppsala, Sweden. Our IoT sensing unit is designed and developed using low-cost hardware components and open source software, which makes it easy to replicate. We demonstrate that it can serve as an affordable solution for real-time measurements and has potential to complement traditional monitoring to cover larger areas. We use low-power communication based on IEEE 802.15.4, RPL, and MQTT, and achieve high end-to-end delivery ratio (>98%) in an outdoor setting. Moreover, we carry out network analysis of our testbed and provide detailed insights into its characteristics.

  • 11.
    Ben Abdesslem, Fehmi
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Abrahamsson, Henrik
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ahlgren, Bengt
    RISE - Research Institutes of Sweden, ICT, SICS.
    Measuring Mobile Network Multi-Access for Time-Critical C-ITS Applications2018In: TMA 2018 - Proceedings of the 2nd Network Traffic Measurement and Analysis Conference, 2018Conference paper (Refereed)
    Abstract [en]

    Cooperative Intelligent Transport Systems (C-ITS) make road traffic safer and more efficient, but require the mobile networks to handle time-critical applications. While some applications may need new dedicated communications technologies such as IEEE 802.11p or 5G, other applications can use current cellular networks. This study evaluates the performance that connected vehicles can expect from existing networks, and estimates the potential gain of multi-access by simultaneously transmitting over several operators. We upload time-critical warning messages from buses in Sweden, and characterise transaction times and network availability. We conduct the experiments with different protocols: UDP, TCP, and HTTPS. Our results show that when using UDP, the median transaction time for sending a typical warning message is 135 ms. We also show that multi-access can bring this value down to 73 ms. For time-critical applications requiring transaction times under 200 ms, multi-access can increase availability of the network from to 57.4% to 92.0%.

  • 12.
    Abrahamsson, Henrik
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ben Abdesslem, Fehmi
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ahlgren, Bengt
    RISE - Research Institutes of Sweden, ICT, SICS.
    Björkman, Mats
    Mälardalen University, Sweden.
    Brunstrom, Anna
    Karlstad University, Sweden.
    Marsh, Ian
    RISE - Research Institutes of Sweden, ICT, SICS.
    Selecting Operator in 3G/4G Networks for Time-Critical C-ITS Applications2018Conference paper (Refereed)
  • 13.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Hurtig, Per
    Abrahamsson, Henrik
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Grinnemo, Karl-Johan
    Brunstrom, Anna
    Are MIRCC and Rate-based Congestion Control in ICN READY for Variable Link Capacity?2017Conference paper (Refereed)
    Abstract [en]

    Information-centric networking~(ICN) has been introduced as a potential future networking architecture. ICN promises an architecture that makes information independent from location, application, storage, and transportation. Still, it is not without challenges. Notably, there are several outstanding issues regarding congestion control: Since ICN is more or less oblivious to the location of information, it opens up for a single application flow to have several sources, something which blurs the notion of transport flows, and makes it very difficult to employ traditional end-to-end congestion control schemes in these networks. Instead, ICN networks often make use of hop-by-hop congestion control schemes. However, these schemes are also tainted with problems, e.g., several of the proposed ICN congestion controls assume fixed link capacities that are known beforehand. Since this seldom is the case, this paper evaluates the consequences in terms of latency, throughput, and link usage, variable link capacities have on a hop-by-hop congestion control scheme, such as the one employed by the Multipath-aware ICN Rate-based Congestion Control~(MIRCC). The evaluation was carried out in the OMNeT++ simulator, and demonstrates how seemingly small variations in link capacity significantly deteriorate both latency and throughput, and often result in inefficient network link usage.

  • 14.
    Abrahamsson, Henrik
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ahlgren, Bengt
    RISE - Research Institutes of Sweden, ICT, SICS.
    Lindvall, Patrik
    TeliaSonera, Sweden.
    Nieminen, Johanna
    TeliaSonera, Sweden.
    Tholin, Per
    TeliaSonera, Sweden.
    Traffic Characteristics on 1Gbit/s Access Aggregation Links2017Conference paper (Refereed)
    Abstract [en]

    Large network operators have thousands or tens of thousands of access aggregation links that they need to manage and dimension properly. Measuring and understanding the traffic characteristics on these type of links are therefore essential. What do the traffic intensity characteristics look like on different timescales from days down to milliseconds? How do the characteristics differ if we compare links with the same capacity but with different type of clients and access technologies? How do the traffic characteristics differ from that on core network links? These are the type of questions we set out to investigate in this paper. We present the results of packet level measurements on three different 1Gbit/s aggregation links in an operational IP network. We see large differences in traffic characteristics between the three links. We observe highly skewed link load probability densities on timescales relevant for buffering (i.e. 10-milliseconds). We demonstrate the existence of large traffic spikes on short timescales (10-100ms) and show their impact on link delay. We also found that these traffic bursts often are caused by only one or a few IP flows.

  • 15.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Wu, Yanqiu
    RISE, Swedish ICT, SICS. KTH Royal Institute of Technology, Sweden.
    Demo: Experimental Feasibility Study of CCN-lite on Contiki Motes for IoT Data Streams2016In: Proceedings of the 3rd ACM Conference on Information-Centric Networking, 2016, p. 221-222Conference paper (Refereed)
    Abstract [en]

    Many IoT applications are inherently information-centric, making it advantageous to use ICN transport. We demonstrate CCN-lite ported to run on Contiki sensor motes with limited processing and storage resources. We show a method for mapping streams of sensor data to a stream of immutable CCN named data objects, and an adaptive probing method to find the newest value. We also demonstrate interoperation between MQTT and CCN via a gateway. A higher level goal is to use ICN as an open interface for accessing IoT data.

  • 16.
    Lindgren, Anders
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ben Abdesslem, Fehmi
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Schelén, Olov
    Luleå University of Technology, Sweden.
    Malik, Adeel Mohammad
    Ericsson, Sweden.
    Design Choices for the IoT in Information-Centric Networks2016In: : 2016 13th IEEE Annual Consumer Communications & Networking Conference (CCNC), 2016, 10, p. 882-888Conference paper (Refereed)
    Abstract [en]

    This paper outlines the tradeoffs involved in utilizing Information-Centric Networking (ICN) for Internet of Things (IoT) scenarios. It describes contexts and applications where the IoT would benefit from ICN, and where a hostcentric approach would be better. Requirements imposed by the heterogeneous nature of IoT networks are discussed in terms of connectivity, power availability, computational and storage capacity. Design choices are then proposed for an IoT architecture to handle these requirements, while providing efficiency and scalability. An objective is to not require any IoT specific changes of the ICN architecture per se, but we do indicate some potential modifications of ICN that would improve efficiency and scalability for IoT and other applications.

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    FULLTEXT01
  • 17.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Hidell, Markus
    KTH Royal Institute of Technology, Sweden.
    Ngai, Edith
    Uppsala University, Sweden.
    Internet of Things for Smart Cities: Interoperability and Open Data2016In: IEEE Internet Computing, ISSN 1089-7801, E-ISSN 1941-0131, Vol. 20, no 6, p. 52-56Article in journal (Refereed)
    Abstract [en]

    The Internet of Things (IoT) for smart cities needs accessible open data and open systems, so that industries and citizens can develop new services and applications. As an example, the authors provide a case study of the GreenIoT platform in Uppsala, Sweden.

  • 18.
    Hoiland-Jorgensen, Toke
    et al.
    Karlstad University, Sweden.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Hurtig, Per
    Karlstad University, Sweden.
    Brunstrom, Anna
    Karlstad University, Sweden.
    Measuring Latency Variation in the Internet2016In: Proceedings of the 12th International on Conference on emerging Networking EXperiments and Technologies, ACM Press, 2016, p. 473-480Conference paper (Refereed)
    Abstract [en]

    We analyse two complementary datasets to quantify the latency variation experienced by internet end-users: (i) a large-scale active measurement dataset (from the Measurement Lab Network Diagnostic Tool) which shed light on long-term trends and regional differences; and (ii) passive measurement data from an access aggregation link which is used to analyse the edge links closest to the user.

    The analysis shows that variation in latency is both common and of significant magnitude, with two thirds of samples exceeding 100, ms of variation. The variation is seen within single connections as well as between connections to the same client. The distribution of experienced latency variation is heavy-tailed, with the most affected clients seeing an order of magnitude larger variation than the least affected. In addition, there are large differences between regions, both within and between continents. Despite consistent improvements in throughput, most regions show no reduction in latency variation over time, and in one region it even increases.

    We examine load-induced queueing latency as a possible cause for the variation in latency and find that both datasets readily exhibit symptoms of queueing latency correlated with network load. Additionally, when this queueing latency does occur, it is of significant magnitude, more than 200\,ms in the median. This indicates that load-induced queueing contributes significantly to the overall latency variation.

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    fulltext
  • 19. Zhang, Yanyong
    et al.
    Raychadhuri, Dipankar
    Grieco, Luigi Alfredo
    Baccelli, Emmanuel
    Burke, Jeff
    Ravindran, Ravishankar
    Wang, Guoqiang
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Schelén, Olov
    Requirements and Challenges for IoT over ICN: IETF Internet-Draft draft-zhang-icnrg-icniot-requirements-012016Other (Other academic)
    Abstract [en]

    The Internet of Things (IoT) promises to connect billions of objects to the Internet. After deploying many stand-alone IoT systems in different domains, the current trend is to develop a common, "thin waist" of protocols forming a horizontal unified, defragmented IoT platform. Such a platform will make objects accessible to applications across organizations and domains. Towards this goal, quite a few proposals have been made to build a unified host-centric IoT platform as an overlay on top of today's host-centric Internet. However, there is a fundamental mismatch between the host-centric nature of todays Internet and the information-centric nature of the IoT system. To address this mismatch, we propose to build a common set of protocols and services, which form an IoT platform, based on the Information Centric Network (ICN) architecture, which we call ICN-IoT. ICN-IoT leverages the salient features of ICN, and thus provides seamless mobility support, security, scalability, and efficient content and service delivery. This draft describes representative IoT requirements and ICN challenges to realize a unified ICN-IoT framework. Towards this, we first identify a list of important requirements which a unified IoT architecture should have to support tens of billions of objects, then we discuss how the current IP-IoT overlay fails to meet these requirements, followed by discussion on suitability of ICN for IoT. Though we see most of the IoT requirements can be met by ICN, we discuss specific challenges ICN has to address to satisfy them. Then we provide discussion of popular IoT scenarios including the "smart" home, campus, grid, transportation infrastructure, healthcare, Education, and Entertainment for completeness, as specific scenarios requires appropriate design choices and architectural considerations towards developing an ICN-IoT solution.

  • 20.
    Lindgren, Anders
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ben Abdesslem, Fehmi
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Schelén, Olov
    Malik, Adeel
    Applicability and Tradeoffs of Information-Centric Networking for Efficient IoT2015Other (Other academic)
  • 21.
    Abrahamsson, Henrik
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Tholin, Per
    TeliaSonera, Sweden.
    Delay and Traffic Intensity Monitoring in an Operational IP Network2015In: 11th Swedish National Computer Networking Workshop (SNCNW 2015), Karlstad, Sweden, 2015, 6Conference paper (Refereed)
  • 22.
    Malik, Adeel Mohammad
    et al.
    Ericsson, Sweden.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ohlman, Börje
    Ericsson, Sweden.
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ngai, Edith
    Uppsala University, Sweden.
    Klingsbo, Lukas
    Uppsala University, Sweden.
    Lång, Magnus
    Uppsala University, Sweden.
    Experiences from a field test using ICN for live video streaming2015In: 2015 IEEE International Conference on Multimedia & Expo Workshops (ICMEW), 2015, 10, article id 7169800Conference paper (Refereed)
    Abstract [en]

    Information Centric Networking (ICN) aims to evolve the Internet infrastructure from a host-centric to a data-centric paradigm. In particular, it improves performance and resource efficiency in events with large crowds where many users in a local area want to generate and watch media content related to that event. In this paper, we present the design of a live video streaming system built on the NetInf ICN architecture and how the architecture was adapted to support live streaming of media content. To evaluate the feasibility and performance of the system, extensive field trials were carried out over several days during a major sports event. We show that our system streams videos successfully with low delay and communication overhead compared with existing Internet streaming services, supporting several thousands of simultaneous users.

  • 23.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ohlman, Börje
    Malik, Adeel Mohammad
    NetInf Live Video Specification2015Other (Other academic)
    Abstract [en]

    This document specifies how the NetInf information-centric network service can be used for transport of live video streaming. To illustrate this it describes a prototype system that was developed to be used at "events with large crowds", e.g., sports events. The specification defines how the used video format is mapped to NetInf named data objects (NDOs). It also describe how NetInf messages are used to transfer the NDOs.

  • 24.
    Malik, Adeel Mohammad
    et al.
    Ericsson, Sweden.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Klingsbo, Lukas
    Uppsala University, Sweden.
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Lång, Magnus
    Uppsala University, Sweden.
    Ngai, Edith C.-H.
    Uppsala University, Sweden.
    Ohlman, Börje
    Ericsson, Sweden.
    NetInf Live Video Streaming at the 2015 Nordic World Ski Championship2015In: 11th Swedish National Computer Networking Workshop (SNCNW 2015), Karlstad, Sweden, 2015, 6Conference paper (Refereed)
  • 25.
    Malik, Adeel Mohammad
    et al.
    Ericsson, Sweden.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ohlman, Börje
    Ericsson, Sweden.
    NetInf Live Video Streaming for Events with Large Crowds2015In: Proceedings of the 2nd ACM Conference on Information-Centric Networking (ACM-ICN '15), Paris, France, 2015, 6, p. 209-210Conference paper (Refereed)
    Abstract [en]

    Information Centric Networking (ICN) aims to evolve the Internet from a host-centric to a data-centric paradigm. In particular, it improves performance and resource efficiency in events with large crowds where many users in a local area want to generate and watch media content related to the event. We present the design of a live video streaming system built on the NetInf ICN architecture and how the architecture was adapted to support live streaming of media content. To evaluate the feasibility and performance of the system, extensive field tests were carried out over several days during a major sports event. Our system streams videos successfully with low delay and communication overhead compared with existing Internet streaming services. It can scale to support several thousands of simultaneous users at a time and is well-suited for events with large crowds and flash crowd scenarios.

  • 26.
    Lindgren, Anders
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ben Abdesslem, Fehmi
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Schelén, Olov
    Malik, Adeel Mohammad
    Proposed Design Choices for IoT over Information Centric Networking2015Other (Other academic)
    Abstract [en]

    This document discusses and describes design choices made in order to utilize Information Centric Networking (ICN) for the Internet of Things (IoT). Based on requirements and challenges identified in draft-zhang-icnrg-iotchallenges-00, we propose design choices for an IoT architecture to handle these requirements, while providing efficiency and scalability. An objective is to, as far as possible, not require IoT specific changes of the ICN architectures per se, but we do indicate some potential modifications of ICN that would improve efficiency and scalability for IoT and other applications. Furthermore, the document starts outlining how to map the proposed design choices to existing ICN architectures, in a first instance shown for CCN1.0.

  • 27. Zhang, Yanyong
    et al.
    Raychadhuri, Dipankar
    Grieco, Luigi Alfredo
    Baccelli, Emmanuel
    Burke, Jeff
    Ravindran, Ravishankar
    Wang, Guoqiang
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Schelén, Olov
    Requirements and Challenges for IoT over ICN2015Other (Other academic)
    Abstract [en]

    The Internet of Things (IoT) promises to connect billions of objects to the Internet. After deploying many stand-alone IoT systems in different domains, the current trend is to develop a common, "thin waist" of protocols forming a horizontal unified, defragmented IoT platform. Such a platform will make objects accessible to applications across organizations and domains. Towards this goal, quite a few proposals have been made to build a unified host-centric IoT platform as an overlay on top of today's host-centric Internet. However, there is a fundamental mismatch between the host-centric nature of todays Internet and the information-centric nature of the IoT system. To address this mismatch, we propose to build a common set of protocols and services, which form an IoT platform, based on the Information Centric Network (ICN) architecture, which we call ICN-IoT. ICN-IoT leverages the salient features of ICN, and thus provides seamless mobility support, scalability, and efficient content and service delivery. This draft describes representative IoT requirements and ICN challenges to realize a unified ICN-IoT framework. Towards this, we first identify a list of important requirements which a unified IoT architecture should have to support tens of billions of objects, then we discuss how the current IP-IoT overlay fails to meet these requirements, followed by discussion on suitability of ICN for IoT. Though we see most of the IoT requirements can be met by ICN, we discuss specific challenges ICN has to address to satisfy them. Then we provide discussion of popular IoT scenarios including the "smart" home, campus, grid, transportation infrastructure, healthcare, Education, and Entertainment for completeness, as specific scenarios requires appropriate design choices and architectural considerations towards developing an ICN-IoT solution.

  • 28.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Jonasson, Arndt
    RISE, Swedish ICT, SICS, Software and Systems Engineering Laboratory.
    Ohlman, Börje
    Ericsson AB, Sweden.
    HTTP Live Streaming over NetInf Transport2014Conference paper (Refereed)
    Abstract [en]

    We modified a commercial Android TV app to use NetInf ICN transport. It was straightforward to adapt the standard HTTP Live Streaming to NetInf naming and network service. We demonstrate that NetInf's in-network caching and request aggregation result in efficient live TV distribution.

  • 29.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Jonasson, Arndt
    RISE, Swedish ICT, SICS, Software and Systems Engineering Laboratory.
    Scalable Live TV Distribution with NetInf to Android Devices (poster/demo)2014Conference paper (Refereed)
    Download full text (pdf)
    fulltext
  • 30.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    NetInf Routing Using Hints2013Conference paper (Refereed)
    Abstract [en]

    We define a global routing mechanism for the NetInf protocol, part of the NetInf information-centric networking architecture. The mechanism makes use of two levels of aggregation in order to provide the scalability needed for a global network. An anticipated $10^{15}$ number of individual named data objects are aggregated to in the order of 500K routing hints which are very feasible to handle with existing routing technology. The hints are then used to forward requests for named data towards the publisher.

  • 31.
    Dannewitz, Christian
    et al.
    University of Paderborn, Germany.
    Kutscher, Dirk
    NEC Laboratories Europe, Germany.
    Ohlman, Börje
    Ericsson Research, Sweden.
    Farrell, Stephen
    Trinity College Dublin, Ireland.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Karl, Holger
    University of Paderborn, Germany.
    Network of Information (NetInf): An Information-Centric Networking Architecture2013In: Computer Communications, ISSN 0140-3664, E-ISSN 1873-703X, Vol. 36, no 7, p. 721-735Article in journal (Refereed)
    Abstract [en]

    Information-centric networking (ICN) is a promising approach to networking that has the potential to provide better -- more natural and more efficient -- solutions for many of today's important communication applications including but not limited to large-scale content distribution. This article describes the NetInf architecture -- a specific ICN approach that targets global-scale communication and supports many different types of networks and deployments, including traditional Internet access/core network configurations, data centers, as well as challenged and infrastructure-less networks. NetInf's approach to connecting different technology and administrative domains into a single information-centric network is based on a hybrid name-based routing and name resolution scheme. In this article, we describe the most important requirements that motivated the NetInf design. We present an architecture overview and discuss the different architecture elements such as naming, message forwarding, caching, and a NRS in detail. As efficient caching and a scalable NRS are two main success factors, we present an evaluation of both elements based on a theoretical analysis, complemental simulation results, and prototyping results. The results suggest that a scalable NRS for 10^15 and more objects with resolution latencies (well) below 100ms is possible, implying that a global NetInf that removes the need for today's application-specific overlay solutions is feasible.

  • 32.
    Su, Gang
    et al.
    Huazhong University of Science and Technology, China.
    Hidell, Markus
    KTH Royal Institute of Technology, Sweden.
    Abrahamsson, Henrik
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Li, Dan
    Tsinghua University, China.
    Sjödin, Peter
    KTH Royal Institute of Technology, Sweden.
    Tanyingyong, Voravit
    KTH Royal Institute of Technology, Sweden.
    Xu, Ke
    Tsinghua University, China.
    Resource management in radio access and IP-based core networks for IMT advanced and beyond2013In: Science China Information Sciences, ISSN 1674-733X, E-ISSN 1869-1919, Vol. 56, no 2, p. 169-184Article in journal (Refereed)
    Abstract [en]

    The increased capacity needs, primarily driven by content distribution, and the vision of Internet-of-Things with billions of connected devices pose radically new demands on future wireless and mobile systems. In general the increased diversity and scale result in complex resource management and optimization problems in both radio access networks and the wired core network infrastructure. We summarize results in this area from a collaborative Sino-Swedish project within IMT Advanced and Beyond, covering adaptive radio resource management, energy-aware routing, OpenFlow-based network virtualization, data center networking, and access network caching for TV on demand.

  • 33.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Karl, Holger
    Kutscher, Dirk
    Zhang, Lixia
    Special section on Information-Centric Networking (editorial)2013In: Computer Communications, ISSN 0140-3664, E-ISSN 1873-703X, Vol. 36Article in journal (Refereed)
  • 34.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Dannewitz, Christian
    University of Paderborn, Germany.
    Imbrenda, Claudio
    NEC Laboratories Europe, Germany.
    Kutscher, Dirk
    NEC Laboratories Europe, Germany.
    Ohlman, Börje
    Ericsson, Germany.
    A Survey of Information-Centric Networking2012In: IEEE Communications Magazine, ISSN 0163-6804, E-ISSN 1558-1896, Vol. 50, p. 26-36Article in journal (Refereed)
    Abstract [en]

    The information-centric networking (ICN) concept is a significant common approach of several Future Internet research activities. The approach leverages in-network caching, multi-party communication through replication, and interaction models decoupling senders and receivers. The goal is to provide a network infrastructure service that is better suited to today's use, in particular content distribution and mobility, and that is more resilient to disruptions and failures. The ICN approach is being explored by a number of research projects. We compare and discuss design choices and features of proposed ICN architectures, focussing on the following main components: named data objects, naming and security, API, routing and transport, and caching. We also discuss the advantages of the ICN approach in general.

  • 35.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Dannewitz, Christian
    Imbrenda, Claudio
    Kutscher, Dirk
    Ohlman, Börje
    A Survey of Information-Centric Networking (Draft)2011Conference paper (Refereed)
  • 36.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Aranda, Pedro A.
    Chemouil, Prosper
    Correia, Luis M.
    Holger, Karl
    Oueslati, Sara
    Söllner, Michael
    Welin, Annikki
    Content, Connectivity and Cloud: Ingredients for the Network of the Future2011In: IEEE Communications Magazine, ISSN 0163-6804, E-ISSN 1558-1896, Vol. 49, p. 62-70Article in journal (Refereed)
    Abstract [en]

    A new network architecture for the Internet needs ingredients from three approaches: information-centric networking, cloud computing integrated with networking, and open connectivity. Information-centric networking considers pieces of information as first-class entities of a networking architecture, rather than only indirectly identifying and manipulating them via a node hosting that information; this way, information becomes independent from the devices they are stored in, enabling efficient and application-independent information caching in the network. Cloud networking offers a combination and integration of cloud computing and virtual networking. It is a solution that distributes the benefits of cloud computing more deeply into the network, and provides a tighter integration of virtualisation features at computing and networking levels. To support these concepts, open connectivity services need to provide advanced transport and networking mechanisms, making use of network and path diversity (even leveraging direct optical paths) and encoding techniques, and dealing with ubiquitous mobility of user, content and information objects in a unified way.

  • 37.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ohlman, Börje
    Axelsson, Erik
    Brown, Lars
    Experiments with Subversion Over OpenNetInf and CCNx2011Conference paper (Refereed)
    Abstract [en]

    We describe experiences and insights from adapting the Subversion version control system to use the network service of two information-centric networking (ICN) prototypes: OpenNetInf and CCNx. The evaluation is done using a local collaboration scenario, common in our own project work where a group of people meet and share documents through a Subversion repository. The measurements show a performance benefit already with two clients in some of the studied scenarios, despite being done on un-optimised research prototypes. The conclusion is that ICN clearly is beneficial also for non mass-distribution applications.

    Download full text (pdf)
    fulltext
  • 38.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ohlman, Börje
    Axelsson, Erik
    Brown, Lars
    Subversion Over OpenNetInf and CCNx2011Conference paper (Refereed)
    Abstract [en]

    We describe experiences and insights from adapting the Subversion version control system to use the network service of two information-centric networking (ICN) prototypes: OpenNetInf and CCNx. The evaluation is done using a local collaboration scenario, common in our own project work where a group of people meet and share documents through a Subversion repository. The measurements show a performance benefit already with two clients in some of the studied scenarios, despite being done on un-optimised research prototypes. The conclusion is that ICN clearly is beneficial also for non mass-distribution applications. It was straightforward to adapt Subversion to fetch updated files from the repository using the ICN network service. The adaptation however neglected access control which will need a different approach in ICN than an authenticated SSL tunnel. Another insight from the experiments is that care needs to be taken when implementing the heavy ICN hash and signature calculations. In the prototypes, these are done serially, but we see an opportunity for parallelisation, making use of current multi-core processors.

    Download full text (pdf)
    fulltext
  • 39. Brown, Lars
    et al.
    Axelsson, Erik
    Use of Information-Centric Networks in Revision Control Systems2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    NetInf and CCN are two Information-Centric Network approaches which are constructed to solve limitations of today’s Internet that was developed in the 60’s. Today’s Internet requires that datum is referred by its location. This is not something the end-user is interested in, the user is only interested in securely finding the information that searched for. These approaches decouple location from data and also aim on embedding security into the information itself and to provide caching functionality directly in networks. The main goal of this thesis work was to show the potential advantages of using the Information-Centric approaches by implementing them into the version control system Subversion and performing experimental evaluations. A Subversion adaptation has successfully been developed which supports both OpenNetInf and CCNx. With a 1Mbit/s connection to the Subversion server evaluation results show that, compared to the original implementation, checkouts can be performed 13(!) times faster using OpenNetInf and 2.3 times faster using CCNx. This work also presents motivation for future work in the area of Information-Centric Networks and has contributed with a working application which exploits advantages of these approaches.

  • 40. Schütz, Simon
    et al.
    Abrahamsson, Henrik
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Brunner, Marcus
    Design and Implementation of the Node Identity Internetworking Architecture2010In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069, Vol. 54, p. 1142-1154Article in journal (Refereed)
    Abstract [en]

    The Internet Protocol (IP) has been proven very flexible, being able to accommodate all kinds of link technologies and supporting a broad range of applications. The basic principles of the original Internet architecture include end-to-end addressing, global routeability and a single namespace of IP addresses that unintentionally serves both as locators and host identifiers. The commercial success and widespread use of the Internet have lead to new requirements, which include Internetworking over business boundaries, mobility and multi-homing in an untrusted environment. Our approach to satisfy these new requirements is to introduce a new Internetworking layer, the node identity layer. Such a layer runs on top of the different versions of IP, but could also run directly on top of other kinds of network technologies, such as MPLS and 2G/3G PDP contexts. This approach enables connectivity across different communication technologies, supports mobility, multi-homing, and security from ground up. This paper describes the Node Identity Architecture in detail and discusses the experiences from implementing and running a prototype.

  • 41.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Vercellone, Vinicio
    Networking of Information – An information-centric approach to the network of the future2010Conference paper (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 42. Ohlman, Börje
    et al.
    Strandberg, Ove
    Dannewitz, Christian
    Lindgren, Anders
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Maglione, Roberta
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Requirements for accessing data in network storage2010Other (Other academic)
    Abstract [en]

    So far, the intended scope of the DECoupled Application Data Enroute (DECADE) working group has mainly been focused on peer-to-peer (P2P) applications. There are however many non-P2P-based applications that could also benefit from in-network storage for caching content. The target of DECADE should thus be to specify a mechanism that is also suitable for generic applications with certain characteristics and not only P2P applications. This document enumerates a number of requirements that should be considered during the design and implementation of this mechanism.

    Download full text (txt)
    FULLTEXT01
  • 43. Dannewitz, Christian
    et al.
    Golić, Jovan
    Ohlman, Börje
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Secure Naming for a Network of Information2010Conference paper (Refereed)
    Abstract [en]

    Several projects propose an information-centric approach to the network of the future. Such an approach makes efficient content distribution possible by making information retrieval host-independent and integrating into the network storage for caching information. Requests for particular content can, thus, be satisfied by any host or server holding a copy. The current security model based on host authentication is not applicable in this context. Basic security functionality must instead be attached directly to the data and its naming scheme. A naming scheme to name content and other objects that enables verification of data integrity as well as owner authentication and identification is here presented. The naming scheme is designed for flexibility and extensibility, e.g., to integrate other security properties like access control. At the same time, the naming scheme offers persistent IDs even though the content, content owner and/or owner’s organizational structure, or location change. The requirements for the naming scheme and an analysis showing how the proposed scheme fulfills them are presented. Experience with prototyping the naming scheme is also discussed. The naming scheme builds the foundation for a secure information-centric network infrastructure that can also solve some of the main security problems of today’s Internet.

    Download full text (pdf)
    FULLTEXT01
  • 44. Schütz, Simon
    et al.
    Abrahamsson, Henrik
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Brunner, Marcus
    Design and implementation of the node identity internetworking architecture2008Report (Other academic)
    Abstract [en]

    The Internet Protocol (IP) has been proven very flexible, being able to accommodate all kinds of link technologies and supporting a broad range of applications. The basic principles of the original Internet architecture include end-to-end addressing, global routeability and a single namespace of IP addresses that unintentionally serves both as locators and host identifiers. The commercial success and widespread use of the Internet have lead to new requirements, which include internetworking over business boundaries, mobility and multi-homing in an untrusted environment. Our approach to satisfy these new requirements is to introduce a new internetworking layer, the node identity layer. Such a layer runs on top of the different versions of IP, but could also run directly on top of other kinds of network technologies, such as MPLS and 2G/3G PDP contexts. This approach enables connectivity across different communication technologies, supports mobility, multi-homing, and security from ground up. This paper describes the Node Identity Architecture in detail and discusses the experiences from implementing and running a prototype.

    Download full text (pdf)
    FULLTEXT01
  • 45.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    D’Ambrosio, Matteo
    4WARD.
    Dannewitz, Christian
    4WARD.
    Marchisio, Marco
    Marsh, Ian
    RISE - Research Institutes of Sweden (2017-2019), ICT, SICS.
    Ohlman, Börje
    Pentikousis, Kostas
    Rembarz, René
    Strandberg, Ove
    Vercellone, Vinicio
    Design considerations for a network of information2008Conference paper (Refereed)
    Abstract [en]

    The existing Internet ecosystem is a result of decades of evolution. It has managed to scale well beyond the original aspirations. Evolution, though, highlighted a certain degree of inadequacies that is well documented. In this position paper we present the design considerations for a re-architected global networking architecture which delivers dissemination and non-dissemination objects only to consenting recipients, reducing unwanted traffic, linking information producers with consumers independently of the hosts involved, and connects the digital with the physical world. We consider issues ranging from the proposed object identifier/locator split to security and trust as we transition towards a Network of Information and relate our work with the emerging paradigm of publish/subscribe architectures. We introduce the fundamental components of a Network of Information, i.e., name resolution, routing, storage, and search, and close this paper with a discussion about future work.

  • 46.
    Gunnar, Anders
    et al.
    RISE, Swedish ICT, SICS.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Blume, Oliver
    Burness, Louise
    Eardley, Philip
    Hepworth, Eleanor
    Sachs, Joachim
    Surtees, Abigail
    Access and Path Selection in Ambient Networks2007Conference paper (Refereed)
  • 47.
    Feeney, Laura Marie
    et al.
    RISE, Swedish ICT, SICS.
    Rohner, Christian
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Leveraging a power save protocol to improve performance in ad hoc networks2007In: SIGMOBILE Mob. Comput. Commun. Rev., ISSN 1559-1662, Vol. 11, p. 51-52Article in journal (Refereed)
  • 48.
    Feeney, Laura Marie
    et al.
    RISE, Swedish ICT, SICS.
    Rohner, Christian
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    The impact of wakeup schedule distribution in synchronous power save protocols on the performance of multihop wireless networks2007Conference paper (Refereed)
    Abstract [en]

    By definition, the operation of an asynchronous power save protocol permits an arbitrary distribution of nodes' wakeup schedules. This wakeup schedule distribution creates an uncoordinated pattern of times at which nodes will attempt to transmit. Intuitively, we would expect that some patterns will be more (or less) favorable than others for a given traffic pattern. We investigate the impact of this wakeup pattern on network capacity and present simulation data showing that the capacity associated with the best wakeup patterns is significantly larger than that of the worst. This result not only gives insight to the behavior of such protocols, but also acts as a feasibility study showing the potential benefit of mechanisms by which nodes adapt their wakeup schedules to obtain improved performance.

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    fulltext
  • 49.
    Ahlgren, Bengt
    et al.
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Eggert, Lars
    Ohlman, Börje
    Schieder, Andreas
    Ambient networks: Bridging heterogeneous network domains2005Conference paper (Refereed)
    Abstract [en]

    Providing end-to-end communication in heterogeneous internetworking environments is a challenge. Two fundamental problems are bridging between different internetworking technologies and hiding of network complexity and differences from both applications and application developers. This paper presents abstraction and naming mechanisms that address these challenges in the Ambient Networks project. Connectivity abstractions hide the differences of heterogeneous internetworking technologies and enable applications to operate across them. A common naming framework enables end-to-end communication across otherwise independent internetworks and supports advanced networking capabilities, such as indirection or delegation, through dynamic bindings between named entities.

    Download full text (pdf)
    fulltext
  • 50.
    Feeney, Laura Marie
    et al.
    RISE, Swedish ICT, SICS.
    Ahlgren, Bengt
    RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Gunningberg, Per
    Enabling limited traffic scheduling in asynchronous ad hoc networks2005Conference paper (Refereed)
    Abstract [en]

    We present work-in-progress developing a communication framework that addresses the communication challenges of the decentralized multihop wireless environment. The main contribution is the combination of a fully distributed, asynchronous power save mechanism with adaptation of the timing patterns defined by the power save mechanism to improve the energy and bandwidth efficiency of communication in multihop wireless networks. The possibility of leveraging this strategy to provide more complex forms of traffic management is explored.

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