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  • 101.
    Brunström, Anna
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Lindskog, Stefan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Garcia, Johan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    NEWCOM DR6.9: Proceedings of the Newcom Department 6 Fourth Technical Workshop2006Report (Refereed)
    Abstract [en]

    The Fourth Newcom Department 6 Technical Workshop was organized in Toulouse, France, on September 13-14, 2006. The workshop program contained 6 presentations and contained reports on ongoing integrated research activities as well as presentation intended to initiate additional joint research activities between the partners. All of the three areas of the department, transport protocols, architectures and cross-layer aspects, and modelling were represented with presentations. This deliverable contains the presentation material from the workshop. The included presentations are:



    - P2P Video Transmission over Heterogeneous Wired/Wireless Networks: A Starting Point for Integrated Research

    - DCCP Overview and First Experiments

    - Estimation of the SCTP Failover Time

    - Improving End to End Goodput of Ad Hoc Networks with SCTP Multihoming

    - A Taxonomy and Survey of SCTP Research

    - Integrating KAUnet and SWINE



    Where available the presentation notes are also included with the presentations

  • 102.
    Brunström, Anna
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Ottosson, T.
    The Introduction of Soft Information in IP-Based Wireless Networks2001Conference paper (Refereed)
    Abstract [en]

    The underlying physical link is transparent in most IP-based networks. Contrary to this commonly accepted

    design rule, we propose that the applications should be made aware of the channel conditions. This is especially

    fruitful for wireless links where the performance is many orders of magnitudes lower than in fixed networks.

    Instead of wasting resources to make the wireless link behave as a fixed link, the application could take care of

    the adaptation to the channel condition. The presented solution assumes that soft information consisting of a

    reliability measure of the received bits is produced in the physical layer. This soft information is then propagated

    to the application. The application may use this information to distinguish between errors caused by fading and network congestion. Another possible use for soft information is to make the applications adapt the source and channel codes to the current channel condition and thus maximize performance.

  • 103.
    Brunström, Anna
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Simha, R
    Dynamic versus Static Load Balancing in a Pipeline Computation1997In: International Journal of Modeling and Simulation. Vol. 17, No 4, 1997, pp317-327Article in journal (Refereed)
  • 104. Bubenko jr, Janis
    et al.
    Fischer Hübner, Simone
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Lindskog, Stefan
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Nilsson, Anders G.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Promote IT 2004: Proceedings of the Fourth Conference for the Promotion of research in IT at New Universities and University Colleges in Sweden, 5-7 May, Karlstad University, The Knowledge Foundation, Part 1 and Part 22004Book (Refereed)
    Abstract [sv]

    The Knowledge Foundation of Sweden and Karlstad University are proud to announce the fourth annual conference for promoting research and advanced education in topics of IT at Sweden's new universities and university colleges. The conference takes place at Karlstad University in Sweden, May 5-7, 2004.



    The conference is in the Foundation's programme for promoting research and advanced education in topics of IT at Sweden's new universities and university colleges. Almost 200 MSEK (about 22 MEUR) has been allocated, for a period of five years, in order to increase the number of IT-teachers with a PhD. degree at Sweden's new universities and university colleges.



    Since the start of the programme in year 2000, almost one hundred persons are actively pursuing their graduate studies and research at these new universities and colleges. These are the persons that now present their progress at this conference

  • 105. Burnett, Robert
    et al.
    Brunström, Anna
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Nilsson, Anders G.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Perspectives on Multimedia: Communication, Media and Information Technology2003Book (Refereed)
    Abstract [en]

    The uses of multimedia are rapidly increasing. Its power to present information in ways not previously possible and its integration of resources, allow for the creation of rich learning environments. The book "Perspectives on Multimedia: Communication, Media and Information Technology" provides a critical examination of the latest multimedia developments and approaches, such as Interface Technology and QoS architectures.



    Topics covered include:

    - The key concepts intrinsic to digital forms of multimedia: integration, interactivity, hypermedia, immersion, narrativity, and hybridity.

    - The development of Informatiuon Technology (IT) usage in society and in the business community.

    - How modern IT enables private companies and public organisations to support business operations, create new business opportunities, and to promote more proactive service management.

    - Multimedia from a computer science perspective and how computer science provides the technical foundation for the computer software and hardware that drives the information usage.



    Gives a broad range of perspectives on key issues for interactive multimedia in organsiations and industry today. This book will be of interest to practioners involved in multimedia development in an organisation, management consultants gviving professional advice on digital solutions and inforamtion technology matters to their customer organisations and academics focusing on business and technical aspects of multimedia frameworks

  • 106.
    Buskqvist, Ulf
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Arts and Education. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Molin, Lennart
    Karlstad University, Faculty of Arts and Education. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Forskningsanknytning och IKT: Röster från lärarutbildningen vid Karlstads universitet2011Report (Other academic)
    Abstract [sv]

    Denna studie handlar om hur ett forskningsanknutet IKT-perspektiv kan stärkas och integreras i högre utbildning. Studien är en fallstudie av lärarutbildningen vid Karlstads universitet och syftar till att identifiera och belysa de förutsättningar som finns inom högre utbildning att åstadkomma och förankra forskningsanknytning av och med IKT. Det övergripande syftet utgörs av två delar; att (1) beskriva vilken forskning om IKT med anknytning till lärarutbildningen som i dagsläget finns på universitetet, och (2) beskriva vilka möjligheter som finns att forskningsanknyta lärarutbildningen avseende IKT. Metoderna som används är fokusgrupper, en kartläggning av forskningsdatabasen samt intervjuer.

    Studien visar att det finns en avsaknad av forskningsprojekt om IKT, liksom bristfälliga kunskaper bland lärarutbildarna om vilken forskningslitteratur som finns att tillgå och knyta an till inom ramen för utbildningen. Det finns ett stort intresse för frågan och det betraktas som angeläget att lärosätet bedriver forskning om IKT som är relevant för lärarutbildningen. En central förutsättning för att kunna ha en forskningsanknuten lärarutbildning på ett kunskaps-/kompetensområde är att det finns aktuell forskning att tillgå. Lärarutbildningen vid Karlstads universitet har ett tydligt behov av att få en ökad forskningsaktivitet om frågor som rör lärande och undervisning i relation till IKT. En rimlig ambition torde vara att det inom ”det moderna universitet” bedrivs lärarutbildningsrelevant forskning som innefattar aspekter av modern informations-, kommunikations- medieteknik.

    Studien visar vidare att IKT inte enbart är ett kunskapsområde som kan forskningsanknytas utan också ett medel (ett verktyg) för att underlätta och skapa nya möjligheter för studenterna att komma nära forskningens praktik. Frågan huruvida det på lärosätet finns relevant forskning om IKT som kommer lärarutbildningen tillgodo bör således kompletteras med frågan hur IKT kan användas så att studenterna hamnar i situationer där de själva lär sig att identifiera angelägna problem, ställa relevanta frågor, positionera sig, genomföra någon form av analys och komma fram till valida ståndpunkter.

  • 107. Börjesson, Mats
    et al.
    Enquist, Bo
    Eriksson, Torbjörn
    Haglund, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Vad är en bra trafikhuvudman?: Förstudie1999Report (Refereed)
  • 108. Börnow, Maria
    et al.
    Stenberg, Pernilla
    Wicander, Gudrun
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Kan sponsring bistå med upplysning och utveckling? - en studie av finansieringsform för ett elektrifieringsprojekt i nordöstra Zambia2002Report (Refereed)
  • 109. Camenisch, Jan
    et al.
    Fischer-Hübner, SimoneKarlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.Murayama, YukoPortmann, ArmandRieder, Carlos
    Future Challenges in Security and Privacy for Academia and Industry: Proceedings of the 26th IFIP TC 11 International Information Security Conference, SEC 2011, Lucerne/Switzerland, June 20112011Conference proceedings (editor) (Refereed)
  • 110. Camenisch, Jan
    et al.
    Fischer-Hübner, Simone
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Rannenberg, Kai
    Privacy and Identity Management for Life2011Book (Refereed)
  • 111. Camenisch, Jan
    et al.
    Shelat, Abhi
    Sommer, Dieter
    Fischer Hübner, Simone
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Hansen, Marit
    Krasemann, Henry
    Lacoste, Gerard
    Leenes, Ronald
    Tseng, Jimmy
    Privacy and Identity Management for Everyone2005Conference paper (Refereed)
  • 112. Carlsson, Carin
    et al.
    Haglund, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Från bil till buss: utvärdering av fyra experiment med direktmarknadsföring inom kollektivtrafiken1998Report (Refereed)
  • 113.
    Castro C, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Prasad, Durga M
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Avallone, Stefano
    Peer-to-Peer Selection and Channel Assignment for Wireless Mesh Networks2011Conference paper (Refereed)
    Abstract [en]

    Wireless mesh networks are an emerging paradigm for future broadband wireless access networks, with manyapplication areas ranging from content distribution over community networking and providing backhaul networking for sensor devices. In wireless mesh networks, clients connect to wireless routers which are equipped with one or more wireless cards and relay the packets over the wireless links towards internetgateways or the destination. Peer-to-Peer applications are an important class of applications which contributes nowadays to the majority of internet traffic. Therefore, it is important to provide high capacity in the mesh network to support them. However, the capacity of wireless mesh networks depends on many factors such as network topology and size, traffic volume and pattern, interfaces per node and channel assignment scheme used, modulation schemes, routing approaches, etc. In this paper, we develop an analytical framework which allows to estimate theachievable capacity of a wireless mesh network when peer-to-peer applications download many flows simultaneously. The model is based on the collision domain concept and incorporates various channel assignment, replication and peer selection strategies. We investigate the achievable capacity for various scenarios and study the impact of different parameters such as the number of channels or radios used

  • 114.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Biglia, Paola
    Inchingolo, Irene
    Bogucka, Hanna
    Zalonis, Andreas
    NEWCOM++ DI3.1 Report on first year researchers exchange and joint publications2009Other (Other (popular science, discussion, etc.))
    Abstract

    The report is dedicated to the description of the actions that have taken place during the first year of

    NEWCOM++ within WPI.3 Valorization of human capital.

    This WP is inserted in the integration activities of NEWCOM++; the integration among partners gives

    the opportunity to researchers to meet and exchange their talents. This positive trend gives a benefit to

    the network as a whole and it is a chance for researchers to improve their knowledge and values.

    Therefore, in order to have some indicators on the degree of integration among the partners, data on

    joint papers, researchers exchange and grants, are presented.

    A final paragraph is dedicated to gender issue, as the importance of this topic involves NEWCOM++

    life too.

    As a result, 38 scientific exchanges of a short term and long-term durations have been taken place, 47

    joint papers have been published, 2 mobility grants for projects implementation have been given by

    the NEWCOM++ Mobility Panel, as well as one grant for the PhD student to participate in the ICT

    Mobile Summit 2008

  • 115.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Dely, Peter
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Karlsson, Jonas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Capacity Increase for Voice over IP Traffic through Packet Aggregation in Wireless Multihop Mesh Networks2007Conference paper (Refereed)
    Abstract [en]

    Recently, Voice over IP (VoIP) has become an important service for the future internet. However, for ubiquitous wireless VoIP services, greater coverage will be necessary as promised by the advent of e.g. 802.11 WLAN based wireless meshed networks. Unfortunately, the transmission of small (voice) packets imposes high overhead which leads to low capacity for VoIP over 802.11 based multihop meshed networks. In this work, we present a novel packet aggregation mechanism that significantly enhances capacity of VoIP in wireless meshed networks while still maintaining satisfactory voice quality. Extensive experiments using network simulation ns-2 confirm that our packet aggregation algorithm can lead to a significantly increase in the number of supported concurrent VoIP flows over a variety of different hop numbers while reducing the MAC layer contention

  • 116.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Galluccio, L
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Palazzo, S
    Rametta, C
    On the comparison between performance of DHT-based protocols for opportunistic networks2010In: Proceedings of Future Network and MobileSummit 2010, IIMC , 2010Conference paper (Refereed)
    Abstract [en]

    Opportunistic networks represent a new frontier for networking research as due to node mobility the network might become disconnected. Such intermittent connectivity imposes challenges to protocol design, especially when information access might require the availability of updated information about resources shared by mobile nodes. An opportunistic network can be seen as a peer-to-peer network where resources should be located in a distributed way. Numerous solutions for P2P resource management have been proposed in the last years. Among the different approaches being considered, Distributed Hash Table (DHT) based schemes offer the advantages of a distributed approach which can be tuned to network scalability. In this paper we consider two well known P2P DHT-based solutions for wireless networks denoted as Bamboo and Georoy, and compare their performance in a multihop wireless scenario. We evaluate scalability and key lookup behavior for different network sizes. The results allow us to gain insights into protocol behavior which allows to select for a given network configuration the appropriate scheme.

  • 117.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Gallucio, Laura
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Rametta, Corrado
    Opportunistic P2P Communications in Delay Tolerant Rural Scenarios2011In: EURASIP Journal on Wireless Communications and Networking, ISSN 1687-1472, E-ISSN 1687-1499, Vol. Januari, article id 892038Article in journal (Refereed)
    Abstract [en]

    Opportunistic networking represents a promising paradigm for support of communications, specifically in infrastructure-less scenarios such as remote areas communications. In principle in opportunistic environments, we would like to make available all the applications thought for traditional wired and wireless networks like file sharing and content distribution. In this paper we present a delay tolerant scenario for file sharing applications in rural areas where an opportunistic approach is exploited. In order to support communications, we compare two peer-to-peer (P2P) schemes initially conceived for wireless networks and prove their applicability and usefulness to a DTN scenario where replication of resources can be used to improve the lookup performance and the network can be occasionally connected by mean of a data mule. Simulation results show the suitability of the schemes and allow to derive interesting design guidelines on the convenience and applicability of such approaches

  • 118.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Challenges of SIP in Internet Connected MANETs2007Conference paper (Refereed)
    Abstract [en]

    Mobile Ad Hoc networking has been considered as one of the most important technologies to support future Ubiquitous and Pervasive Computing Scenarios and internet connected MANETs will be an integral part of future wireless networks. For providing multimedia services and Voice over IP in such environment, support for Session Initiation Protocol (SIP) is essential. A MANET is a decentralized collection of autonomous nodes but a SIP infrastructure requires centralized proxies and registrar servers. In this paper, we study the implications of using standard SIP architecture in internet connected MANETs. We analyze performance limitations of SIP service scalability when centralized proxies/registrars located in the access network are used by MANET nodes. We also present and compare an alternative approach to provide SIP services in internet connected MANETs in order to minimize the impact of such performance limitations

  • 119.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    On the Interaction Between Peer Selection, Routing and Channel Assignment2011Conference paper (Other (popular science, discussion, etc.))
  • 120.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Optimizing SIP service provisioning in internet connected MANETs (Invited Paper)2006Conference paper (Other (popular science, discussion, etc.))
    Abstract [en]

    Recently, Mobile Ad-hoc Networks (MANETs) have gained a lot of attraction because they are flexible, self-configurable and fast to deploy. Systems beyond 4G are likely to consist of a combination of heterogeneous wireless technologies and naturally might comprise MANETs as one component. In order to provide multimedia services such as Voice over IP in such environment, support for Session Initiation Protocol (SIP) is essential. A MANET is a decentralized collection of autonomous nodes but a SIP infrastructure requires centralized proxies and registrar servers. In this paper, we first study the implications of using standard SIP architecture in internet connected MANETs. We analyze limitations of SIP service scalability when centralized proxies/registrars located in the Access Network are used by MANET nodes. Finally, we present alternative approaches to provide SIP services in such environment to avoid such limitations

  • 121.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    SIP based Service Provisioning for hybrid MANETs2007Conference paper (Refereed)
    Abstract [en]

    Traditional Voice over IP (VoIP) systems is based on client/server architecture, which is not applicable to Mobile Ad Hoc Networks (MANETs), which are a decentralized collection of autonomous nodes. However, internet connectivity for MANETs becomes important as internet connected MANETs can serve as hot spot extension in 4G scenarios. Here, MANET nodes can reach any wired node thus potentially registering with SIP proxies in the fixed network becomes a viable solution. In order to study the implications of using VoIP systems in internet connected MANETs we present in this paper simulation result of SIP service scalability when centralized proxies/registrars located in the Access Network are used by MANET nodes. Alternative approaches to provide SIP services in such environment are also discussed to improve performance

  • 122.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    SIP in hybrid MANETs - A gateway based approach2006Conference paper (Refereed)
    Abstract [en]

    Mobile Ad Hoc networking has been considered as one of the most important technologies to support future Ubiquitous and Pervasive Computing Scenarios and internet connected MANETs will be an integral part of future wireless networks. For providing multimedia services and Voice over IP in such environment, support for Session Initiation Protocol (SIP) is essential. A MANET is a decentralized collection of autonomous nodes but a SIP infrastructure requires centralized proxies and registrar servers. In this paper, we study the implications of using standard SIP architecture in internet connected MANETs. We analyze performance limitations of SIP service scalability when centralized proxies/registrars located in the Access Network are used by MANET nodes. We also present and compare an alternative approach to provide SIP services in internet connected MANETs in order to minimize the impact of such performance limitations

  • 123.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Avallone, Stefano
    Uni Napoli.
    BestPeer: A Load-aware Multi-path Peer Selection for Wireless Mesh Networks2012In: 2012 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), IEEE Press, 2012Conference paper (Refereed)
    Abstract [en]

    In this paper we study the interactions between peer selection, routing and channel assignment while deploying Peer-to-Peer (P2P) systems over multi-channel multi-radio Wireless Mesh Networks (WMNs). In particular we propose Bestpeer, a novel peer selection algorithm for WMNs which incorporates a cross-layer path load metric and integrates multi-path load balancing capability throughout the P2P download process in order to achieve faster resource disseminations. By comparing Bestpeer with BitTorrent through extensive simulations, we show that we can reduce the time to disseminate a resource by up to 40 %. The key mechanism used by Bestpeer to increase performance in WMNs is the effective exploitation of cross-layer information made available from the routing and channel assignment during the peer selection process in order to balance the load along high capacity paths

  • 124.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Avallone, Stefano
    Measuring the Impact of ACI in Cognitive Multi-Radio Mesh Networks2010Conference paper (Refereed)
    Abstract

    In this paper we address the impact of ACI on dynamic spectrum allocation in multi-radio systems. In particular, we present the benefits of dynamic spectrum allocation by adapting channel bandwidth and distance in order to mitigate ACI in multi-radio mesh networks. Based on our measurement campaign in an indoor mesh testbed, which we extended in order to use adaptive channel width, we evaluate the performance in terms of network throughput. We show that by using channel bandwidth adaptation and antenna separation, the impact of ACI can be significantly reduced. The performed experiments give important insights into ACI in multi-radio cognitive systems which help to develop e.g. better channel assignment algorithms or capacity estimation methods

  • 125.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Castro, Marcel C
    Chiasserini, Carla-Fabiana
    Casetti, Claudio
    Korpeoglu, Ibrahim
    Peer-to-Peer Overlay in Mobile Ad-hoc Networks2009In: Handbook of Peer-to-Peer Networking / [ed] X. Shen, H. Yu and J. Buford and M. Akon, New York: Springer , 2009Chapter in book (Other academic)
    Abstract

    Wireless multi-hop networks such as mobile ad-hoc (MANET) or wireless

    mesh networks (WMN) have attracted big research efforts during the last years

    as they have huge potential in several areas such as military communications, fast

    infrastructure replacement during emergency operations, extension of hotspots or

    as an alternative communication system. Due to various reasons, such as characteristics

    of wireless links, multi-hop forwarding operation, and mobility of nodes,

    performance of traditional peer-to-peer applications is rather low in such networks.

    In this book chapter, we provide a comprehensive and in-depth survey on recent research

    on various approaches to provide peer-to-peer services in wireless multi-hop

    networks. The causes and problems for low performance of traditional approaches

    are discussed. Various representative alternative approaches to couple interactions

    between the peer-to-peer overlay and the network layer are examined and compared.

    Some open questions are discussed to stimulate further research in this area

  • 126.
    Cavalcanti de Castro, Marcel
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Kliot, Gabriel
    Friedman, Roy
    Kummer, Raphäel
    Kropf, Peter
    Felber, Pascal
    Minimizing DHT Routing Stretch in MANETs2009Conference paper (Refereed)
  • 127. Chansarkar, Bel
    et al.
    Newman, Karin
    Rundh, Bo
    Haglund, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Perceptions of Products and Services - Europe 19931994Report (Refereed)
  • 128.
    Chow, Lawrence
    et al.
    Stanford University.
    Collins, Bradley
    Stanford University.
    Bambos, Nick
    Stanford University.
    Peylo, Christoph
    Telekom Innovation Laboratories.
    Einsiedler, Hans
    Telekom Innovation Laboratories.
    Bayer, Nico
    Telekom Innovation Laboratories.
    Dely, Peter
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science.
    Kassler, Andreas
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Playout-Buffer Aware Hand-Off Control for Wireless Video Streaming2012In: 2012 IEEE Global Communications Conference (GLOBECOM 2012): Proceedings of a meeting held 3-7 December 2012, Anaheim, California, USA, IEEE conference proceedings, 2012, p. 5237-5242Conference paper (Refereed)
    Abstract [en]

    Wireless hand-off control typically considers only connectivity strength from the mobile terminal to alternative access points. In wireless video streaming, however, where video freezing must be avoided at the mobile terminal, the playout buffer level should also be considered by hand-off control. In this paper, we first develop a model capturing hand-off dynamics under video streaming, and design a new playout buffer aware hand-off control. It aims to avert a video freeze for as long as possible, maximizing the expected time until freezing. We compute the optimal control in the general case of multiple access points and multiple connectivity strength states per channel. The optimal hand-off control is then computationally probed in specific relevant cases. It is demonstrated that there is a certain playout buffer threshold level - a buffer tipping point - above which a hand-off should be attempted. Of course, this tipping point depends on the access point to mobile channel statistics

  • 129. Christensen, Lars
    et al.
    Andersson, Nina
    Carlsson, Carin
    Haglund, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Marknadsundersökning: en handbok, Första upplagan1998Book (Refereed)
  • 130. Christensen, Lars
    et al.
    Andersson, Nina
    Engdahl, Carin
    Haglund, Lars
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Business Administration. Karlstad University, Faculty of Economic Sciences, Communication and IT, The Service and Market Oriented Transport Research Group. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Marknadsundersökning: En handbok, Andra upplagan2001Book (Refereed)
  • 131.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    A Contentious Terrain in EU Information Society Policies:: Media Pluralism and Freedom of Expression2008In: MedieKultur: Journal of Media and Communication ResearchArticle in journal (Refereed)
  • 132.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Abstract Inclusion-Concrete Exclusion: ICTs, EU Policies and Aspects Of Digital Divide2006Conference paper (Refereed)
  • 133.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Changing Media and Altering Theoretical Models: Impacts of Private Broadcasting in Turkey: Reconstruction of National Identity.2000Conference paper (Refereed)
  • 134.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Complicit Surveillance and Networked Sociality2009In: Metropolis Weekend (Greek edition), no 20-22 November 2009Article in journal (Other (popular science, discussion, etc.))
  • 135.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Connecting Europe:: Politics of Information Society in the EU and Turkey2009Book (Refereed)
    Abstract

    During the 1990s, in parallel with new media-related initiatives in the US and the Asia-Pacific region, the EU launched its own information society policies in an effort to become, the most competitive knowledge-based economy in the world by 2010. In addition to full members, the task of achieving a European Information Society for all was also expected of candidate countries, including Turkey.



    In Connecting Europe: Politics of Information Society in the EU and Turkey, taking the policy arena as a discursive space, Dr. Miyase Christensen explores the evolution of information society policies in the EU and Turkey. Globalization processes from the 1990s on are explored from the standpoint of contemporary media and communications theory and political economy. Conceptualizing the global and regional shifts in the context of social change and taking commodification and spatialization as entry points, the book presents a detailed account of some of the crucial developments to date (on both on the EU and Turkish sides) based upon in-depth interviews with key stakeholders. The factors that shape the political economy of the telecommunications and ICT sectors in both the EU and Turkey are increasingly complex, engendering new spaces of politics, economy and citizenship

  • 136.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Contextualising the Public Sphere: Freedom of Expression and Diversity in the Turkish Media2009In: Manufacturing Europe. Spaces of Democracy, Diversity and Communication / [ed] Inka Salovaara-Moring, Nordicom , 2009Chapter in book (Refereed)
  • 137.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Defining and Curing the Digital Divide: EU and US Approaches.2001Conference paper (Refereed)
  • 138.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Discursively Shaping the Environment:: Swedish National and Regional Media Coverage of The United Nations Climate Change Conference in Copenhagen (COP15)2010Report (Refereed)
  • 139.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Engendering Transnationalism: Mediated Communication, Everyday Contexts and Turkish Diasporic Women2008Conference paper (Refereed)
  • 140.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    EU Candidacy and Information Society Policies in Turkey: A Reality Check2006In: Global Media Journal-Mediterranean Edition, 1(1), 29-45Article in journal (Refereed)
  • 141.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    European Media, Identity and Culture2007Conference paper (Refereed)
  • 142.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    European Research Networks2007Conference paper (Refereed)
  • 143.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Facebook is Watching You2010In: Le Monde Diplomatique, ISSN 0026-9395, no 109, p. 53-55Article in journal (Other (popular science, discussion, etc.))
  • 144.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    From Culture Industries to Creative Industries: Filmmaking in the EU Area.2005Conference paper (Other (popular science, discussion, etc.))
  • 145.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    From the Printing Press to the Internet: The Development of the Media in Turkey.2003Conference paper (Other (popular science, discussion, etc.))
  • 146.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Information Society: For What Price? EUs IST Policies, WSIS and an EU Candidate Country Perspective.2005Conference paper (Refereed)
  • 147.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Küresel Neye Denir? Ziyi mi Hzl Koar Nicole mü yi Öper? (What is Globalization? Does Ziyi Run Faster or Nicole Kiss Better?)2005In: Seyir, Yaz, No:2, pp. 26-30Article in journal (Other academic)
  • 148.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Mediation, Mediatization and Transnational Space2010Conference paper (Other (popular science, discussion, etc.))
  • 149.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Mediatization, Mediation and Complicit Surveillance: A Study on Transnational Communities in Sweden2010Conference paper (Refereed)
  • 150.
    Christensen, Miyase
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Media and Communication Studies. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    Negotiating Culture and Citizenship in European Media Policy2007Conference paper (Refereed)
1234567 101 - 150 of 884
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