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  • 601.
    Åhlund, Andreas
    et al.
    Umeå University, Department of Computer Science.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Johansson, Dan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Context-aware application mobility support in pervasive computing environments2009In: Proceedings of the 6th International Conference on Mobile Technology, Application & Systems : 2009, Nice, France, September 02 - 04, 2009, New York: ACM Digital Library, 2009Conference paper (Refereed)
    Abstract [en]

    In the future, application mobility can play a crucial role and prove to be an enabler for next generation distributed applications. Application mobility lets an application follow the users while they roam between networks using several devices. In order to achieve seamless application mobility, several issues need to be considered such as device heterogeneity, GUI-adaptation and application loss. Thus, in this paper our contributions are two-fold. Firstly, we present our novel architecture called the Application Mobility Manager (A2M) which provides seamless application mobility. The proposed architecture is context-aware and decentralized. Finally, we present a novel application called the Mobile YouTube Player which is capable of moving between heterogeneous devices and provide users with seamless video experience. We validate the proposed system through rigorous experimentation and user studies based on the real-world test bed and prototype implementation. The results clearly validate that the proposed system can support seamless application mobility.

  • 602. Kikhia, Basel
    et al.
    Hallberg, Josef
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Sani, Zaheer ul Hussain
    Context-aware life-logging for persons with mild dementia2009In: 2009 annual international conference of the IEEE Engineering in Medicine and Biology Society: EMBC 2009 ; Minneapolis, Minnesota, USA, 3 - 6 September 2009, Piscataway, NJ: IEEE Communications Society, 2009, p. 6183-6186Conference paper (Refereed)
    Abstract [en]

    The demands of introducing technology to support independent living is increasing. This is true also for persons suffering from mild dementia who may have difficulties remembering important information, such as activities, numbers, names, objects, faces, and so on. This paper presents a context-aware life-logging system, called MemoryLane, which can support independent living and improve quality of life for persons with mild dementia. The system offers both real time support as well as possibilities to rehearse and recall activities for building episodic memory. This paper also presents a mobile client to be used in MemoryLane, as well as an evaluation of the importance of different data for the purpose of memory recollection.

  • 603.
    Zaslavsky, Arkady
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Burstein, Frada
    Monash University, Melbourne, VIC.
    Context-aware mobile medical emergency management decision support system for safe transportation2009In: 2009 International Conference on DSS: Reflecting on Yesterday, Assessing Today, Envisioning Tomorrow, 2009Conference paper (Other academic)
    Abstract [en]

    Management of safe and successful large-scale events requires detailed careful planning and complex system-wide decision making . However, research into medical emergency knowledge management for just-in-time decision support in mass gatherings lags behind the needs of the community. Unforeseen circumstances, dynamic changes in the environment, various unexpected impact factors require immediate real-time adequate response that can be achieved mainly through context-aware, intelligent and cost-efficient functionality of the systemContext-awareness relates to building an appropriate and relevant model of the surrounding environment (Zaslavsky, 2002). Road system, traffic accidents, congestion, knowledge of individual vehicles, as well as emergency vehicles are all important part of such a model. Context includes information about road infrastructure, data gathered from sensor networks, and other sources of context.We propose to combine mobile communication technologies with pervasive computing techniques which will facilitate and enable effective context-aware decision support for medical emergency management in mass gatherings while ensuring road safety. For example, some intelligent transportation systems can be added to the underlying infrastructure for timecritical decision making in emergency situations. We aim to develop and test a prototype mobile decision support system for improving transportation safety during medical emergency in mass gatherings. The prototype will utilise the medical emergency management ontology, which was developed based on extensive review of the relevant literature and with consultation with industry (Sujanto, et al, 2007).We will report on the project, which capitalizes on smart information use and will be of great benefit to making better transportation decisions in mass gatherings emergency management. This research will result in gaining a clearer understanding of the nature and requirements of road safety in medical emergency during mass gathering events. We propose to build and test a mobile real time decision support tool for improving efficiency of transportation decisions. Such tools will strengthen ability to manage potential health- related hazards in real-time and on the move.ReferencesSujanto, F., Ceglowski, A., Burstein, F., and Churilov, L. (2008). 'An integrated framework for comprehensive collaborative emergency management'. In P. Zarate, J. P. Belaud, G. Camilleri & F. Ravat (Eds.), Collaborative Decision Making: Perspectives and Challenges (pp. 127-138). Amsterdam, Netherlands: IOS Press.Zaslavsky A (2002) Adaptability and Interfaces: Key to Efficient Pervasive Computing, NSF Workshop series on Context-Aware Mobile Database Management, Brown University, Providence, 24-25 Jan, 2002

  • 604.
    Jayaraman, Prem
    et al.
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Dynamic situation modeling and reasoning under uncertainty2009In: AUPC '09: ICPS 2009 & co-located workshops compilation proceedings, July 13-16, 2009, Imperial College, London, UK, New York: ACM Digital Library, 2009, p. 113-122Conference paper (Refereed)
    Abstract [en]

    Reasoning under uncertainty is a key challenge in context aware pervasive systems. In this paper we propose R-CS a situation based context reasoning model that employs ranking technique to rank and order context attributes. Using the proposed ranking technique and available context information, we compute dynamic situation spaces (a collection of contextual attributes that best represent a real world situation) We also propose and incorporate multilevel hierarchical contextual regions into R-CS that enables situation reasoning to be based on one or more dependent context attributes. We present a theoretical approach to compute importance and relevance of newly discovered context attributes which are not defined within the situation space definition by employing the approach of investigating similar neighboring situation spaces. R-CS builds on context spaces theory, a context model based on situation reasoning. We have implemented the proposed algorithms/approaches into R-CS and have validated them by evaluating against context spaces reasoning model.

  • 605.
    Boytsov, Andrey
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Extending context spaces theory by predicting run-time context2009In: Smart Spaces and Next Generation Wired/Wireless Networking: 9th International Conference, NEW2AN 2009 and Second Conference on Smart Spaces, ruSMART 2009, St. Petersburg, Russia, September 15-18, 2009. Proceedings / [ed] Sergey Balandin; Dmitri Moltchanev; Yevgeni Koucheryavy, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2009, p. 8-21Conference paper (Refereed)
    Abstract [en]

    Context awareness and prediction are important for pervasive computing systems. The recently developed theory of context spaces addresses problems related to sensor data uncertainty and high-level situation reasoning. This paper proposes and discusses componentized context prediction algorithms and thus extends the context spaces theory. This paper focuses on two questions: how to plug-in appropriate context prediction techniques, including Markov chains, Bayesian reasoning and sequence predictors, to the context spaces theory and how to estimate the efficiency of those techniques. The paper also proposes and presents a testbed for testing a variety of context prediction methods. The results and ongoing implementation are also discussed.

  • 606.
    Rahmani, Rahim
    et al.
    Department of Information Technology and Media, Mid-Sweden University, Sundsvall.
    Kanter, Theo
    Department of Information Technology and Media, Mid-Sweden University, Sundsvall.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Fuzzy control of active queue management for bursty traffic in heterogeneous networks2009In: IEEE 9th Malaysia International Conference on Communications: MICC 2009 ; Kuala Lumpur, Malaysia, 15 - 17 December 2009 / [ed] Mahamod Ismail, Piscataway, NJ: IEEE Communications Society, 2009, p. 491-496Conference paper (Refereed)
    Abstract [en]

    We propose Fuzzy Adaptive Active Queue Management Controller (FAAQMC) for dynamic buffer tuning at the router/system-level. The intention of an AQM is to achieve high link utilization without introducing an excessive delay in the End-to-End (E2E) path. For high link utilization it is necessary for queues to adapt to varying traffic loads. The contribution of FAAQMC is to make the Fuzzy Logic Controller (FLC) buffer overflow controller suitable for application over the Internet, where the traffic(i.e., bursty traffic) can change suddenly and the buffer length always cover the queue length adaptively. The desire to eliminate the overestimation effect of standard fuzzy arithmetic in the case of Internet traffic burstiness and preserve the FAAQMC merits the use of this adaptation and learning mechanism

  • 607.
    Johansson, Dan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bränberg, Agneta
    Umeå universitet.
    Hur startar man ett helt nätbaserat utbildningsprogram?: Datoranvändning/e-learning som exempel på en första kurs på ett program. Tankar bakom, hur kursen utvecklats och resultat från kursen2009In: Undervisning på tvären: Student- och lärarerfarenheter. Den nionde universitetspedagogiska konferensen, 25-26 februari 2009 / [ed] Erik Lindenius, Umeå universitet. Universitetspedagogiskt Centrum , 2009, p. 93-104Conference paper (Refereed)
  • 608.
    Schmidt, Mischa
    NEC Laboratories Europe, NEC Europe Ltd., Heidelberg.
    IMS Based IPTV: ETSI TISPAN Standards Applied2009In: Proceedings of the 5th International ICST Mobile Multimedia Communications Conference, ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering) , 2009, p. 55:1-55:4Chapter in book (Refereed)
    Abstract [en]

    This paper summarizes IMS based IPTV as defined in ETSI TISPAN Release 2 as well as the potential enhancements being added in Release 3 at the time of writing. After an introduction to the use cases and to TISPAN NGN standardization, the different aspects, such as Service Discovery, User Profiles and the underlying signaling concepts are discussed. Furthermore this paper provides links to other ongoing standardization work of ETSI TISPAN e.g. in the area of Content Delivery Networks, Content Distribution (ETSI MCD) as well as in the area of the evolution of Home Networks. This paper can be considered a guide to the IMS based IPTV as defined in ETSI TISPAN specifications of Releases 2 and 3, a solution that allows service providers to build their service offerings using standardized Network platforms

  • 609.
    Nylander, Stina
    et al.
    Swedish Institute of Computer Science.
    Lundquist, Terés
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Brännström, Andreas
    Umeå universitet.
    Karlson, Bo
    Squace AB, Stockholm.
    "It's just easier with the phone": a diary study of Internet access from cell phones2009In: Pervasive Computing: 7th International Conference, Pervasive 2009, Nara, Japan, May 11-14, 2009. Proceedings / [ed] Hideyuki Tokuda; Michael Beigl; Adrian Friday; A.J. Bernheim Brush; Yoshito Tobe, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2009, p. 354-371Conference paper (Refereed)
    Abstract [en]

    We conducted a diary study of how 19 experienced users accessed the Internet from cell phones. Our data show that participants often chose the cell phone to access the Internet even though they had access to a computer, and the most common location for Internet access being the home. Reasons for choosing the phone over the computer were speed, convenience and a desire to use the phone for fun. Additionally, the phone is kept close and is always on which makes it convenient to use. The traditional motivation for mobile services "finding out something about where you are" only accounts for 15% of the user activity.

  • 610.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Mobile mediator control function: an IEEE 802.21-based mobility management and access network selection model2009In: Proceedings of the 18th ICT-Mobile Summit / [ed] Paul Cunningham; Miriam Cunningham, IIMC International Information Management Corporation , 2009Conference paper (Refereed)
    Abstract [en]

    This paper proposes a combined network and application layer access network decision model for multimedia applications in heterogeneous networking environments. It builds on previous work of a network layer based metric used in combination with multihomed Mobile IP and introduces a mechanism for applications to interact with the mobility management system in the mobile node. This way, applications executing in the mobile node can decide either to take access network decisions on their own or to let the network layer handle mobility management tasks automatically based on default decision criterion decided by the end-user.An extended architecture based on previous work and the upcoming IEEE 802.21 standard for media-independent handover services is presented. The control plane, named "Mobile Mediator Control Function", offers a set of events and commands through an additional service access point. Results from a scenario with a Voice over IP application running in the proposed environment simulated in OPNET Modeler are presented.

  • 611.
    Jayaraman, Prem Prakash
    et al.
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    On-the-fly situation composition within smart spaces2009In: Smart Spaces and Next Generation Wired/Wireless Networking: 9th International Conference, NEW2AN 2009 and Second Conference on Smart Spaces, ruSMART 2009, St. Petersburg, Russia, September 15-18, 2009. Proceedings / [ed] Sergey Balandin; Dmitri Moltchanev; Yevgeni Koucheryavy, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2009, p. 52-65Conference paper (Refereed)
    Abstract [en]

    Advances in pervasive computing systems have made smart computing spaces a reality. These smart spaces are sources of large amount of data required for context aware pervasive applications to function autonomously. In this paper we present a situation aware reasoning system that composes situations at runtime based on available  information from the smart spaces. Our proposed system R-CS uses situation composition on-the-fly to compute temporal situations that best represent the real world situation (contextual information). Our proposed situation composition algorithm is dependent on underlying sensor data (hardware and software). These sensory data are prone to errors like inaccuracy, old data, data ambiguity etc. R-CS proposes algorithms that incorporate sensor data errors estimation techniques into our proposed dynamic situation composition based reasoning system. R-CS is built as an extension to Context Spaces, a fixed situation set based reasoning system. We implement R-CS dynamic situation composition algorithms over context spaces and validate our proposed R-CS model against context spaces' fixed situation reasoning model.

  • 612.
    Hong, Xin
    et al.
    Ulster University.
    Nugent, Chris
    Ulster University.
    Finley, Dewar
    Ulster University.
    Chen, Luke
    Ulster University.
    Davies, Richard
    Ulster University.
    Wang, Haiying
    Ulster University.
    Donnelly, Mark
    Ulster University.
    Zheng, Huiru
    Ulster University.
    Mulvenna, Maurice
    Ulster University.
    Hallberg, Josef
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    OpenHome: Approaches to Constructing Sharable Datasets within Smart Homes2009In: CHI '09: Extended Abstracts on Human Factors in Computing Systems, New York: ACM Digital Library, 2009Conference paper (Refereed)
    Abstract [en]

    In this paper we present our initial efforts to develop approaches for structuring and building openly accessible, scalable, shared home behaviour datasets within smart home communities.

  • 613.
    Hallberg, Josef
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Backlund-Norberg, Mia
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Nugent, Chris
    Computer Science Research Institute, University of Ulster.
    Profile management for dynamic groups2009In: Intelligent Patient Management, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2009, p. 297-313Chapter in book (Refereed)
    Abstract [en]

    There is a growing need in supporting social networking for groups who often become isolated, such as elders living at home. In a social network people with similar diseases and ailments can find each other and share information to improve their understanding of their illness. Group communication tools can help maintain a virtual social network and provide a base for information retrieval. Nevertheless, they often lack the strengths of the social networking tools and vice versa. Within this work we have developed a new concept called dynamic groups. Dynamic groups make creation, management, and usage of groups for communication and social networking easy. Nevetheless, for this to work the profile management system is required to handle more than just user information, it is required to provide users with control over their data and offer privacy and customisation capabilities. This article presents HomeCom, a model for profile management in dynamic groups. It also presents the solutions for making queries, as well as the solutions for privacy and customisation using multiple profiles and an integrated rule engine.

  • 614. Johansson, Dan
    et al.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Brännström, Robert
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Projekt: MOSA - mobil och öppen tjänste-access2009Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Projektet ämnar till att möjliggöra uppkoppling av fler hushåll och företag till bredbandsnät, utveckla en teknisk plattform som ökar tillgång till tjänster och möjliggör mobilitet mellan olika accessnätverk. Genom att möjliggöra mobilitet kommer tjänster att vara nåbara på flera platser, mobiliteten skapar också utrymme för nya tjänster.

  • 615.
    Hallberg, Josef
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Kikhia, Basel
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bengtsson, Johan
    InterNIT.
    Sävenstedt, Stefan
    Luleå University of Technology, Department of Health Sciences, Nursing Care.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Reminiscence processes using life-log entities for persons with mild dementia2009In: Proceedings of the First International Workshop on Reminiscence Systems (RSW-2009): Cambridge, UK, 5 September, 2009, 2009, p. 16-21Conference paper (Refereed)
    Abstract [en]

    In this paper we present the reminiscence process in a prototype memory support tool for persons with mild dementia. The purpose is to promote autonomy for persons with mild dementia by supporting actualization and maintenance of episodic memories, and real-time access to a context-annotated life log.  The main research challenges are defined with a user scenario, Suitable reminiscence methods and memory entitities to reperesent life logs are described, and a preliminary architecture is presented. Finally an early design of a concrete ReviewClient is shown, to solicit feedback on the reminiscence methods, entitites chosen, architecture and the usability of the proposed interface.

  • 616.
    Gunasekera, Kutila
    et al.
    Faculty of Information Technology, Monash University.
    Loke, Seng Wai
    Department of Computer Science & Computer Engineering, La Trobe University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Krisnaswamy, Shonali
    Faculty of Information Technology, Monash University.
    Runtime adaptation of multiagent systems for ubiquitous environments2009In: IWI 2009: 2009 IEEE/WIC/ACM International Conference on Web Intelligence : proceedings, 15-18 September, 2009 : Università degli Studi di Milano Bicocca, Milano, Italy, Los Alamitos, Calif: IEEE Communications Society, 2009, Vol. 2, p. 486-490Conference paper (Refereed)
    Abstract [en]

    There is a growing need to develop adaptive mobile agent systems to meet the increasing complexity and dynamic environments of distributed applications. This paper proposes and argues that using compositional adaptation of individual and teamed software agents allows multiagent systems to radically change their behaviors and structure at runtime. We describe and analyze an application scenario which motivates a compositionally adaptive agent based approach. The challenges and different solutions are described. The paper then proposes the VERSAG approach which is used to combine the benefits of the various approaches in a novel manner. This paper also presents experimental evaluations which compare these adaptive mobile agents with standard non-adaptive mobile agents.

  • 617.
    Gunasekera, Kutila
    et al.
    Monash University, Melbourne, VIC.
    Krishnaswamy, Shonali
    Monash University, Melbourne, VIC.
    Loke, Seng Wai
    La Trobe University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Runtime efficiency of adaptive mobile software agents in pervasive computing environments2009In: AUPC '09: ICPS 2009 & co-located workshops compilation proceedings, July 13-16, 2009, Imperial College, London, UK, New York: ACM Digital Library, 2009, p. 123-131Conference paper (Refereed)
    Abstract [en]

    Developing software that can support heterogeneous hardware platforms, adapt to dynamic highly variable environments and meet rapidly changing requirements is a challenge of pervasive computing. Dynamic adaptive software agents are a promising approach to develop software for such environments. We previously proposed an agent architecture which brings together features such as runtime adaptivity, agent mobility, platform-independence, context-awareness and lightweightness which are desirable in pervasive environments. In this paper, we propose and analyse a cost model of network load for our runtime adaptive mobile software agents. We compare our adaptive agents against standard non-adaptive mobile agents using this cost model. Subsequent experimental results demonstrate that our agents outperform non-adaptive mobile agents. We also propose and discuss further features which make our adaptive agent based software solution more suitable for pervasive computing environments.

  • 618.
    Wallin, Stefan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Data Ductus Nord AB, Skellefteå, Sweden.
    Leijon, Viktor
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Landén, Leif
    Data Ductus Nord AB, Skellefteå, Sweden.
    Statistical analysis and prioritisation of alarms in mobile networks2009In: International Journal of Business Intelligence and Data Mining, ISSN 1743-8195, Vol. 4, no 1, p. 4-21Article in journal (Refereed)
    Abstract [en]

    Telecom Service Providers are faced with an overwhelming flow of alarms, which makes good alarm classification and prioritization very important. This paper first provides statistical analysis of data collected from a real-world alarm flow and then presents a quantitative characterization of the alarm situation. Using data from the trouble ticketing system as a reference, we examine the relationship between mechanical classification of alarms and the human perception of them.Using this knowledge of alarm flow properties and trouble ticketing information, we suggest a neural network-based approach for alarm classification. Tests using live data show that our prototype assigns the same severity as a human expert in 50% of all cases, compared to 17% for a naive approach.

  • 619.
    Wallin, Stefan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Leijon, Viktor
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Telecom network and service management: an operator survey2009In: Wired-Wireless Multimedia Networks and Services Management: 12th IFIP/IEEE International Conference on Management of Multimedia and Mobile Networks and Services, MMNS 2009, Venice, Italy, October 26-27, 2009. Proceedings / [ed] Tom Pfeifer; Paolo Bellavista, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2009, p. 15-26Conference paper (Refereed)
    Abstract [en]

    It is hard to know which research problems in network management we should focus our attention on. To remedy this situation we have surveyed fifteen different telecom operators on four continents to gather some feedback on what they desire and expect from the network management research community. Their input forms a foundation for future directions in network management research, and provides us with valuable insight into what the most urgent problems are in industry.

  • 620.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A mobility management scheme for heterogeneous environments supporting vehicular speeds using a policy-based approach2008In: Proceedings of the 5th International Workshop Conference on Performance Modelling and Evaluation of Heterogeneous Networks: (HET-NETs), 2008Conference paper (Refereed)
    Abstract [en]

    Today, handsets and terminals are typically equipped with multiple radio interfaces. Meanwhile, various types of access networks using different radio technologies are being deployed all over the world. Also, there is a strong trend towards All-IP-Networks following the principle "Everything over IP", and "IP over everything". This development is leading researchers into the area of heterogeneous networking and overlay topologies.This paper focuses on mobility management issues related to such an environment supporting vehicular speeds of users using a policy-based approach and a network-layer metric for access network selection.A Mobile IP-based architecture is proposed where mobility bindings are sent periodically at a frequency depending on the speed of the user also taking variations in the network-layer metric into account and the overall signaling cost. The architecture is designed with a focus on minimizing packet losses and timely handling of vertical hand-overs.

  • 621.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Elkotob, Muslim
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A new MIP-SIP interworking scheme2008In: MUM'08 Proceedings: 7th ACM International Conference on Mobile and Ubiquitous Multimedia, December 3 - 5, 2008, Umeå, Sweden, New York: ACM Digital Library, 2008, p. 117-120Conference paper (Refereed)
    Abstract [en]

    Mobility management is today handled at various layers in the network stack including the datalink layer, the network layer, the transport layer and the application layer. Also, cross-layer designed solutions exist and the most known example is the work performed by IEEE currently standardizing media-independent handover services under the name of IEEE 802.21.This paper proposes a new interworking scheme for Mobile IP and the Session Initiation Protocol being the most popular solutions for mobility management at the network and application layers respectively. The goal is to deliver seamless mobility for both TCP-based and UDP-based applications taking the best features from each mobility management scheme. In short, this paper proposes that TCP connections are handled through Mobile IP while UDP-based connection-less applications may use the Session Initiation Protocol for handling mobility. The two mobility management solutions are integrated into one common solution.

  • 622.
    Åhlund, Christer
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Wallin, Stefan
    Andersson, Karl
    Brännström, Robert
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A service level model and Internet mobility monitor2008In: Telecommunications Systems, ISSN 1018-4864, E-ISSN 1572-9451, Vol. 37, no 1-3, p. 49-70Article in journal (Refereed)
    Abstract [en]

    Mobility is gaining a tremendous interest among Internet users and wireless access networks are increasingly being installed to enable mobile usage. Internet mobility requires solutions to move between access networks with maintained network connectivity. Seamless mobility in turn means that the experience of using a service is unaffected while being mobile. Communication in next generation networks will use multiple access technologies, creating a heterogeneous network environment. Further, roaming between network service providers may take place. To enable mobile nodes to move between access networks within as well as between network service providers with minimal disruption, nodes should be able to maintain multiple active network connections. With the usage of multihomed nodes, seamless mobility can be achieved in already installed infrastructures, not providing mobility support. Mobility in heterogeneous access networks also requires network selections that scale for services. In this article we propose an architecture where application service providers and network service providers define service levels to be used by a mobile node and its user. The user selects a service and the service level from an application service provider. When performing access network selection, information received as part of an application service level will be used to find a network that supports the service required. The performance of available access networks will be monitored and considered when making the decision. Our proposed architecture provides solutions to move flows between interfaces in real-time based on network performance, quality of service signalling to correspondent nodes, and cancellation of flows to give way for more important traffic.

  • 623.
    Rahmani, Rahim
    et al.
    Mittuniversitetet, Sundsvall.
    Hjelm, Mats
    Mittuniversitetet, Sundsvall.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Active queue management for TCP friendly rate control traffic in heterogeneous networks2008In: International Conference on Telecommunications: ICT 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 1-7Conference paper (Refereed)
    Abstract [en]

    With the increasing number of media flows using UDP in IP networks there is a strong need to enable fairness between UDP and TCP traffic. The TCP traffic will suffer because of the unresponsiveness of UDP to congestion in the IP network. To enable responsiveness of UDP traffic, the TCP-Friendly Rate Control (TFRC) protocol can be used. With the coexistence of TCP and UDP, where the rate adaptation of UDP is managed by the TFRC protocol, knowledge is needed about how Active Queue Management (AQM) algorithms perform to optimize networks performance. This paper studies the behavior of several AQM algorithms when small packet UDP flows compete with TCP flows in a heterogeneous network. A simulation study is presented, showing the results of different AQM algorithms. It shows that the Adaptive AQM (AAQM) is very promising with respect to responsiveness and robustness.

  • 624.
    Hirche, Johannes
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bomark, Peter
    Natural User Interface Europe AB.
    Bauer, Mikael
    Natural User Interface Europe AB.
    Solyga, Pawel
    Natural User Interface Europe AB.
    Adaptive interface for text input on large-scale interactive surfaces2008In: 2008 IEEE International Workshop on Horizontal Interactive Human-Computer System: Amsterdam, Netherlands, 1 - 3 October 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 163-166Conference paper (Refereed)
    Abstract [en]

    In this paper we present a novel approach to text input on large interactive surfaces using a combination of strategies to resolve the inherent difficulties with text input on such a device. Instead of using a conventional full size QWERTY based layout, the idea is to use a very limited set of buttons that, by using word prediction and hints, would only require minimal finger movement. The input mechanism is somewhat related to input methods employed when using keyboards with a limited size and amount of keys, commonly found in phones and other 10 digit keyboards. Given that the main motivation to this approach was not the limited size but rather to overcome the difficult task of locating keys with fingers on a flat and featureless surface, making touchtyping very difficult and requiring frequent visual monitoring of the finger position, we opted to enhance the interaction with easily made gestures, a layout that adapts to the hand anatomy of the user, and easy control over the text prediction.

  • 625. Elkotob, Muslim
    et al.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Analysis and measurement of session setup delay and jitter in VoWLAN using composite metrics2008In: MUM'08 Proceedings: 7th ACM International Conference on Mobile and Ubiquitous Multimedia, December 3 - 5, 2008, Umeå, Sweden / [ed] Arkady Zaslavsky, New York: ACM Digital Library, 2008, p. 190-197Conference paper (Refereed)
    Abstract [en]

    In this paper we look at the signaling for session mobility using the Session Initiation Protocol (SIP) and the Session Description Protocol (SDP). Bearing in mind that perceived voice quality is sensitive mostly to delay variation (also called jitter), we work on bounding that value for providing a better voice Quality of Service over Wireless LAN (WLAN). For mobility we use a hybrid SIP-MIP stack. The basic idea is to combine the strengths of MIP for doing fast handovers and the strengths of SIP for powerful session adaptation capabilities. Numerical calculation figures as well as real implementation results are provided. It can be observed that the session update cycle during mobility can be modified in such a way that session delay variation bounds achieved are quite low and there are almost no spikes. We use composite performance metrics that we defined in previous work to analyze the correlation between the data patterns for session signaling delay in the classical case and our proposed case to better highlight the achieved performance delta.

  • 626.
    Nugent, Chris
    et al.
    University of Ulster.
    Hong, Xin
    University of Ulster.
    Hallberg, Josef
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Finlay, Dewar
    University of Ulster.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Assessing the impact of individual sensor reliability within smart living environments2008In: IEEE International Conference onAutomation Science and Engineering: CASE 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 685-690Conference paper (Refereed)
    Abstract [en]

    The potential of smart living environments to provide a form of independent living for the ageing population is becoming more recognised. These environments are comprised of sensors which are used to assess the state of the environment, some form of information management to process the sensor data and finally a suite of actuators which can be used to change the state of the environment. When providing a form of support which may impinge upon the well being of the end user it is essential that a high degree of reliability can be maintained. Within this paper we present an information management framework to process sensor based data within smart environments. Based on this framework we assess the impact of sensor reliability on the classification of activities of daily living. From this assessment we show how it is possible to identify which sensors within a given set of experiments can be considered to be the most critical and as such consider how this information may be used to propose a set of guidelines which may be adopted for managing sensor reliability from a practical point of view.

  • 627.
    Elkotob, Muslim
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Autonomic resource management in IEEE 802.11 open access networks2008Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This work is inspired by the autonomic networking paradigm. It investigates the issue of making network resource management mechanisms in the access part of wireless networks self-aware and self-configuring. Open access networks (OAN) have private WLAN cells made available for public use and enable bypassing mobile users to profit from continuous coverage, allowing private and public subscribers to share a common infrastructure. Resources are network parameters, e.g. bandwidth, capacity, that have to be fairly and accurately allocated, distributed, and managed in order to optimize performance and ensure proper and fair operation. Analyzing and exploring existing multimedia session and resource management mechanisms on the wireless part is a crucial step for determining their limitations and shortcomings. A new way of making OANs self-aware is proposed and a self-configuring mechanism which has a competitive advantage in the qualitative sense over already existing mechanisms is designed and developed. The amount of network resources as well as the timing and form of their availability are decisive for enabling service functionality and providing a sufficient quality of service level. Our area of discourse is the "last- mile" part of an 802.11 network; i.e. the part between the access point and the mobile node. In OANs, maintaining and updating rates for different flows used by a single terminal traversing many adjacent APs is a challenge in itself. It is solved by using several key design factors. Monitoring the environment locally and updating the designed information structures leads to network self-awareness. Next, a high-level mechanism that aggregates information from several protocols including CARD (Candidate Access Router Discovery), MIP (Mobile IP), and SIP (Session Initiation Protocol) is defined. It specifies the interactions between the mobile terminal and the access point controller. Then capacity maintenance and rate allocation issues at the two end-points of the last-mile are analyzed. The overhead in OANs required for the launching or reconfiguration of a real-time session can be significantly reduced by a proposed algorithm which performs parameter injection into a multimedia data stream instead of following the classical negotiation path. A solution to change the session characteristics of an application that adapts to varying network conditions was developed, including a QoS solution with SIP and MIP to optimize the session characteristics by taking into account the changed conditions in the network. With this approach, reduced session signaling delay and low jitter values are achieved as implementation results show. The thesis is concluded by considering the general issues: self-aware node architectures, self-configuring resource management.

  • 628.
    Jayaraman, Prem Prakash
    et al.
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Cost efficient data collection of sensory originated data using context-aware mobile devices2008In: 2008 Ninth International Conference on Mobile Data Management workshops: MDMW ; Beijing, China, 27 - 30 April 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 190-197Conference paper (Refereed)
    Abstract [en]

    Sensory originated data collection and processing has always been a big challenge in wireless sensor networks (WSN). WSN represent a distributed producer of large amount of valuable data required by varied number of applications. In this paper we propose the use of context aware data mules (CADAMULE) as a solution for smart data collection within sensor networks. We present an extension to Context Spaces modelling theory by incorporating context discovery at runtime. This facilitates our system to discover new context attributes by looking into previous situations and events when pre-defined context is not sufficient for the reasoning process. We use this model as a base to provide contextual information to the mobile data mule whose spare capacity for communication and processing can be used to collect and process sensor data. The focus of the paper is to propose and evaluate a cost-efficient data collection technique which uses a cost formula computed from the context information obtained by the system. We validate our system by a simulation in which we try to reason out and identify the best and also the most cost efficient data mule. The context aware data mule negotiates with the sensor node collecting and delivering the data to the sink

  • 629.
    Jayaraman, Prem Prakash
    et al.
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Coverage area computation on the run for efficient sensor data collection2008In: New technologies, mobility and security: proceedings of NTMS '2008 conference and workshops ; [held in Tangier, Morocco during November 5 - November 7 2008] / [ed] Akshai Aggarwal, Piscataway, NJ: IEEE Communications Society, 2008Conference paper (Refereed)
    Abstract [en]

    Wireless sensor networks have emerged as a key area of research in recent years. With the dominance of ubiquitous and pervasive era of computing, these networks present a rich infrastructure for valuable information. In this paper we focus on efficient data collection in sensor networks by proposing an algorithm to compute a coverage (collection) area using smart mobile objects. The algorithm proposed computes a collection area dynamically covering nodes around the mobile objects current location. It uses a weighed graph technique to identify nodes from which data can be collected efficiently by the mobile object discarding the rest. The proposed algorithm computes the collection area using Voronoi Diagrams and Delaunay triangle. We validate the proposed algorithm by simulating the algorithm over a Bluetooth based sensor network. We also evaluate the algorithms efficiency to compute the coverage area by changing the mobile objects context parameters.

  • 630.
    Winkler, F.
    et al.
    NEC Europe Ltd..
    Abbadessa, D.
    NEC Europe Ltd..
    Silva, J. Da
    NEC Europe Ltd..
    Girao, J.
    NEC Europe Ltd..
    Schmidt, Mischa
    NEC Laboratories Europe, NEC Europe Ltd., Heidelberg.
    Enriching IPTV Services and Infrastructure with Identity Management2008In: IEEE GLOBECOM 2008, Global Telecommunications Conference: New Orleans, Nov. 30 2008-Dec. 4 2008, Piscataway, NJ: IEEE Communications Society, 2008Chapter in book (Refereed)
    Abstract [en]

    IPTV is regarded as one of the key technologies of triple play services by telecommunication incumbents. It is seen as the differentiator to reduce customer churn. However, as more operators deploy this service, the factors for differentiation are dissolving rapidly. In this paper we present how identity management can enrich IPTV and thus provide a variety of new business opportunities that will foster an operator's position and the contractual bindings with its customers. We present novel business models that are made possible by integrated identity management and describe their importance to the user. Furthermore, we address privacy aspects for IPTV service portfolios - a topic which is crucial to gain user acceptance for new services.

  • 631.
    Granlund, Daniel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Andersson, Karl
    Brännström, Robert
    Estimating network performance using low impact probing2008In: Proceedings of the 1st Workshop on Wireless Broadband Access for Communities and Rural Developing Regions: WIRELESS4D '08 / [ed] Andreas J. Kassler, 2008Conference paper (Refereed)
    Abstract [en]

    This paper focuses on estimating network performance in order to make proper decisions regarding data flow path selection. The purpose is to estimate the available bandwidth without flooding the network with traffic like traditional bandwidth measurement tools such as Iperf. By using small datagrams to probe the network rather than flooding the link, delay and jitter can be measured and used for calculations. The idea is to use statistical information about the delay to make an acceptable estimation of the available bandwidth. Lntransform of delay and standard deviation of delay were found to be the most accurate parameters and provide the best correlation. Also, some network technologies have a significant difference in up and downlink delay. This can pose a problem when estimating the link performance. Therefore this paper also proposes a solution to handle measurements in asymmetrical links.

  • 632.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Lundahl, Carl-Gustav
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Lundmark, Martin
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
    Nordvik, Enar
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Pantze, Anna
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Förslag till handlingsplan för utveckling av LTU Skellefteå: Att synas med stolthet2008Report (Other academic)
  • 633.
    Winkler, Florian
    et al.
    NEC Europe Ltd..
    Schmidt, Mischa
    NEC Europe Ltd..
    Felis, Sebastian
    NEC Europe Ltd..
    Neuwirt, Oleg
    NEC Europe Ltd..
    Silva, Joao
    NEC Europe Ltd..
    Richter, Nils
    NEC Europe Ltd..
    Abbadessa, Danile
    NEC Europe Ltd..
    Identity management for IMS-based IPTV2008In: 2008 IEEE Global Telecommunications Conference: New Orleans, Louisiana, 30 November 2008-04 December 2008., Piscataway, NJ: IEEE Communications Society, 2008, p. 1637-1641Conference paper (Refereed)
    Abstract [en]

    IPTV as an integral part of triple play service offers is regarded as a major differentiation factor by incumbent telecommunication operators. However, as more operators provide these services, differentiation is fading. Analysts agree that the key to differentiation are value added services which in the long term require business collaborations of incumbents and 3rd party Service Providers. Additional value is added by integrating existing and well known Internet services into those service portfolios.In this paper, we present how Identity Management technology can simplify the setup of these collaborations and enhance the user experience by secure, anonymous and seamless service usage, e.g. by providing Single Sign On and pseudonyms. We furthermore detail an architecture that combines IPTV based on the IPMultimedia Subsystem with Identity Management to offer consumers a comfortable, privacy aware access to value added services. Especially in the context of IPTV, these are important attributes to reach a high and sustainable user acceptance.

  • 634.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Åhlund, Christer
    Gukhool, Balkrishna Sharma
    Electrical and Computer Engineering Department, Sherbrooke University.
    Cherkaoui, Soumaya
    Electrical and Computer Engineering Department, Sherbrooke University.
    Mobility management for highly mobile users and vehicular networks in heterogeneous environments2008In: 2008 IEEE 33rd Conference on Local Computer Networks: [LCN 2008] ; Montreal, AB, Canada, 14 - 17 October 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 593-599Conference paper (Refereed)
    Abstract [en]

    With the recent developments in wireless networks, different radio access technologies are used in different places depending on capacity in terms of throughput, cell size, scalability etc. In this context, mobile users, and in particular highly mobile users and vehicular networks, will see an increasing number and variety of wireless access points enabling Internet connectivity. Such a heterogeneous networking environment needs, however, an efficient mobility management scheme offering the best connection continuously. In this paper, a mobility management architecture focusing on efficient network selection and timely handling of vertical and horizontal hand-overs is proposed. The solution is based on Mobile IP where hand-over decisions are taken based upon calculations of a metric combining delay and delay jitter. For efficiency reasons, the frequency of binding updates is dynamically controlled, depending on speed and variations in the metric. The dynamic frequency of binding updates helps the timely discovery of congested access points and cell edges so as to allow efficient hand-overs that minimize packet drops and hand-over delays.Results show that the overall signaling cost is decreased and changes in networking conditions are detected earlier compared to standard Mobile IP.

  • 635.
    Padovitz, A.
    et al.
    Centre for Distributed Systems and Software Engineering, Monash University.
    Loke, Seng Wai
    Department of Computer Science and Computer Engineering, La Trobe University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Multiple-agent perspectives in reasoning about situations for context-aware pervasive computing systems2008In: IEEE transactions on systems, man and cybernetics. Part A. Systems and humans, ISSN 1083-4427, E-ISSN 1558-2426, Vol. 38, no 4, p. 729-742Article in journal (Refereed)
    Abstract [en]

    In open heterogeneous context-aware pervasive computing systems, suitable context models and reasoning approaches are necessary to enable collaboration and distributed reasoning among agents. This paper proposes, develops, and demonstrates the following: 1) a novel context model and reasoning approach developed with concepts from the state-space model, which describes context and situations as geometrical structures in a multidimensional space; and 2) a context algebra based on the model, which enables distributed reasoning by merging and partitioning context models that represent different perspectives of computing entities over the object of reasoning. We show how merging and reconciling different points of view over context enhances the outcomes of reasoning about the context. We develop and evaluate our proposed algebraic operators and reasoning approaches with cases using real sensors and with simulations. We embed agents and mobile agents with these modeling and reasoning capabilities, thus facilitating context-aware and adaptive mobile agents operating in open pervasive environments.

  • 636.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    On access network selection models in heterogeneous networking environments2008Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis proposes and evaluates architectures and algorithms for access network selection in heterogeneous networking environments. The ultimate goal is to select the best access network at any time taking a number of constraints into account including user requirements and network characteristics. The proposed architecture enables global roaming between access networks within an operator's domain, as well as across operators without any changes in the data and control plane of the access networks being required. Also, the proposed architecture includes an algorithm for measuring performance of access networks that can be used on a number of access technologies being wired or wireless. The proposed access network selection algorithm also has an end-to-end perspective giving a network performance indication of user traffic being communicated. The contributions of this thesis include an implementation of a simulation model in OPNET Modeler, a proposal of a metric at the network layer for heterogeneous access networks, an implementation of a real-world prototype, a study of multimedia applications on perceived quality of service, an access network selection algorithm for highly mobile users and vehicular networks, and an extension of the mentioned access network selection algorithm to support cross-layer decision making taking application layer and datalink layer metrics into account.

  • 637.
    Wiberg, M.
    et al.
    Umeå university.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Preface2008In: MUM'08 Proceedings: 7th ACM International Conference on Mobile and Ubiquitous Multimedia, December 3 - 5, 2008, Umeå, Sweden, ACM Digital Library, 2008, p. vii-viiiConference paper (Other academic)
  • 638. Granlund, Daniel
    et al.
    Gylling, Arne
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Osipov, Evgeny
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Brännström, Robert
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Jacquier, Anna
    Elkotob, Muslim
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Åhl, Anneli
    Project: BASICNET2008Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Broadband Access Services In Converging NETworks

  • 639.
    Leijon, Viktor
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Wallin, Stefan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Ehnmark, Johan
    Data Ductus.
    SALmon: a Service Modeling Language and Monitoring Engine2008In: IEEE International Symposium on Service-Oriented System Engineering: SOSE '08 / [ed] Jonathan Lee; Deron Liang; Y.C. Cheng, Los Alamitos, Calif: IEEE Communications Society, 2008, p. 202-207Conference paper (Refereed)
    Abstract [en]

    To be able to monitor complex services and examine their properties we need a modeling language that can express them in an efficient manner. As telecom operators deploy and sell increasingly complex services the need to monitor these services increases. We propose a novel domain specific language called SALmon, which allows for efficient representation of service models, together with a computational engine for evaluation of service models. This working prototype allows us to perform  experiments with full scale service models, and proves to be a good trade-off between simplicity and expressive power.

  • 640.
    Albayrak, Sahin
    et al.
    DAI-Labor, Technische Universität Berlin, Germany.
    Elkotob, Muslim
    DAI-Labor, Technische Universität Berlin, Germany.
    Toker, Ahmet
    DAI-Labor, Technische Universität Berlin, Germany.
    Smart middleware for mutual service-network awareness in evolving 3GPP networks: network aware applications & application aware networks2008In: 2008 3rd International Conference on Communication System Software and Middleware and workshops: [COMSWARE 2008]; Bangalore, India, 6 - 10 January 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 44-50Conference paper (Refereed)
    Abstract [en]

    We have designed a smart middleware and are working on implementing and deploying it as a landmark architectural piece run by nodes of the Future Internet. The middleware we propose aims as a main goal at making applications and services fully network-aware in the sense that they utilize network resources and tune their own demands based on what the underlying networks can offer. On the other hand, the smart middleware makes networks service aware in the sense that networks also adapt their configuration to service demands. Challenges of the Future Internet such as scalability, increased interoperability, and smart collaboration between engines are addressed by our middleware. Focusing on 3GPP networks including IP Multimedia Subsystem (IMS) networks, this paper presents the architectural design of our middleware and shows in two showcases how and why it is capable of addressing future challenges. Scenarios such as service and network-aware coordinated load balancing and "always-best-connected" as a service verify the merits of our smart middleware design.

  • 641.
    Jayaraman, Prem Prakash
    et al.
    Caulfield School of Information Technology, Monash University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Delsing, Jerker
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Smart sensing and sensor data collection on the move for modelling intelligent environments2008In: Next Generation Teletraffic and Wired/Wireless Advanced Networking: 8th International Conference, NEW2AN and 1st Russian Conference on Smart Spaces, ruSMART 2008, St. Petersburg, Russia, September 3-5, 2008. Proceedings / [ed] Sergey Balandin; Dimitri Moltchanov; Yevgeni Koucheryavy, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2008, p. 306-317Conference paper (Refereed)
    Abstract [en]

    With advent of pervasive computing and considerable acceptance of sensor networks, smart sensing techniques and data collection have been topics of interest. This paper presents a smart sensing and data collection technique from sensor networks using context aware high powered mobile objects within the environment. The paper proposes CAM-R a context aware robot that can move within smart environments sensing new sensor sources and collecting sensory originated data efficiently. Based on these sensed data sources, we propose an extension to context spaces model that builds a virtual model of the intelligent environment. This intelligent environment model built using extended context spaces can be used by number of context aware applications to efficiently query and retrieve data from the sensor network using CAM-R based data collection approach. We also present a prototype implementation of CAM-R built using off-the-shelf hardware and a context based cost function used to compute data collection decisions. We validate our system by implementing the virtual modelling of the intelligent environment based on simulated input obtained from CAM-R and sensors. We also evaluate CAM-Rby simulating and comparing the energy spent by the sensor nodes during data collection process using our proposed approach and traditional fixed sink based approach.

  • 642.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Smartness of pervasive computing systems through context-awareness2008In: Next Generation Teletraffic and Wired/Wireless Advanced Networking: 8th International Conference, NEW2AN and 1st Russian Conference on Smart Spaces, ruSMART 2008 St. Petersburg, Russia, September 3-5, 2008. Proceedings / [ed] Sergey Balandin; Dimitri Moltchanov; Yevgeni Koucheryavy, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2008, p. 261-262Conference paper (Refereed)
    Abstract [en]

    Emerging pervasive computing and communications technologies evolved into ample pioneering initiatives, leading towards a world in which computing systems are distributed, mobile, intelligent, supportive, unobtrusive, invisible and cooperative. Central to the notion of a pervasive systems is context-awareness. Context-aware computing endeavours to make systems aware of specific, relevant circumstances in the computing environment, and enable them to adapt their behaviour accordingly. Context-aware systems can process (intelligently) the context information acquired by any type of a sensor (either physical, computational or virtual). This, in turn, enhances services provided to users (including service personalization), makes pervasive systems smart by reacting (and possibly pro-acting) to changing circumstances, and enables adaptability and autonomy of systems, freeing users from avoidable sometimes routine interactions.

  • 643.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Lövf, Eva
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
    Studenters upplevelser av distansundervisning: en fallstudie2008Report (Other academic)
    Abstract [sv]

    Artikeln presenterar resultat från en studie av studenters upplevelser vid införande av modern videokonferensteknik i undervisningen. Studien omfattar 40 studenter vid fyra kurser. Resultaten indikerar att universitet och högskolor, förutom kostnadsbesparingar, lätt kan engagera specialistkompetens i kurser, erbjuda undervisning utanför campus och underlätta studentens självstudier. I sin bästa form uppnås både rums- och tidsoberoende. Samtidigt indikerar resultaten att det finns utrymme för förbättringar vid undervisning via videokonferenssändningar, främst i interaktionen mellan student och lärare. Oavsett lärarens pedagogik, ämnets inriktning och studenternas vana vid modern teknik så föredrog 39 av de 40 studenterna i undersökningen att ha en lärare på plats. Till viss del kan detta förklaras av teknikproblem, som delvis åtgärdats under kursernas genomförande, men även av att lärarna inte anpassat sin pedagogik fullt ut. Vår bedömning är att om rätt pedagogik används kan både kommunikation och interaktion fungera mycket bra och vara en utmärkt undervisningsform även om lärare och student inte befinner sig på samma plats.Vi föreslår att lärarna som sänder föreläsningarna ges tillfälle att interagera mer med studenterna, både synkront och asynkront, vilket kräver att kurserna planeras på annat sätt än vid traditionell campus-undervisning. Vidare föreslår vi att studenter på annan ort regelbundet erbjuds separata tillfällen för att diskutera och ställa frågor till läraren och gärna träffas fysiskt. Avslutningsvis föreslår vi att en särskild ämneskunnig producent, s.k. e-moderator, engageras parallellt med lärarens undervisning, för att stöda studenterna som följer föreläsningarna genom att besvara deras frågor. Alternativt kan en e-moderator uppmärksamma läraren på relevanta frågor som dyker upp, så att en utökad interaktion uppnås.

  • 644. Burstein, F.
    et al.
    Cowie, J.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Pedro, J. San
    Support for real-time decision making in mobile financial applications2008In: Handbook on Decision Support Systems 2: Variations, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2008, p. 81-106Chapter in book (Other academic)
  • 645.
    Burstein, Frada
    et al.
    Monash University, Melbourne, VIC.
    Cowie, Julie
    Department of Computing Science and Mathematics, University of Stirling.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Pedro, Jocelyn San
    Group Market Risk, National Australia Bank Limited, Melbourne.
    Support for real-time decision making in mobile financial applications2008In: Information Systems and E-Business Management, ISSN 1617-9846, E-ISSN 1617-9854, Vol. 6, no 3, p. 257-278Article in journal (Refereed)
    Abstract [en]

    Mobile users making real-time decisions based on current information need confidence that their context has been taken into consideration in producing the system's recommendations. This chapter reviews current use of mobile technologies for context-aware real-time decision support. Specifically, it describes a framework for assessing the impact of mobility in decision making. The framework uses dynamic context model of data quality to represent uncertainties in the mobile decision-making environment. This framework can be used for developing visual interactive displays for communicating to the user relevant changes in data quality when working in mobile environments. As an illustration, this chapter proposes a real-time decision support procedure for on-the-spot assistance to the mobile consumer when choosing the best payment option to efficiently manage their budget. The proposed procedure is based on multi-attribute decision analysis, scenario reasoning, and a quality of data framework. The feasibility of the approach is demonstrated with a mobile decision-support system prototype implementation.

  • 646.
    Kodikara, Ruwini
    et al.
    Centre for Distributed Systems and Software Engineering, Monash University.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Zaslavsky, Arkady
    Supporting adaptive real-time mobile communication with multilayer context awareness2008In: Wireless and Mobile Networking: IFIP Joint Conference on Mobile and Wireless Communications Networks (MWCN'2008) and Personal Wireless Communications (PWC'2008), Toulouse, France, September 30 - October 2, 2008 / [ed] Zoubir Mammeri, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2008, p. 435-446Conference paper (Refereed)
    Abstract [en]

    Real time mobile communication is challenging due to the inherent limitations of mobile networks. On the other hand the stringent quality of service requirements of real time traffic is highly in demand. Our first contribution is the generic context aware architecture for adaptive real time applications. Adaptation is based on the awareness of context parameters from different layers of the existing protocol stack which involves context exchange among the neighboring layers as well as non-neighboring layers. The architecture comprises of context representation, context acquisition, cross-layer context exchange and context management. Our second contribution is the mobility aware, adaptive Multi-homed Mobile IP. Simulation of adaptive M-MIP was carried out as a proof of concept. Simulation demonstrated that adaptation to mobility was able to decrease Mobile IP handover latency. Further, the results show that the quality of service of real time traffic can be enhanced by using context aware adaptive MIP. The simulation involved with various speeds ranging from pedestrian scenarios to vehicular scenarios. Results are analyzed with variable data rates. The evaluations show that performance of the proposed solution is better compared to conventional MIP in terms of packet loss and throughput of real time traffic.

  • 647.
    Wallin, Stefan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Landen, Leif
    Data Ductus Nord AB.
    Telecom alarm prioritization using neural networks2008In: 22nd International Conference on Advanced Information Networking and Applications - Workshops: AINAW 2008, Los Alamitos, Calif: IEEE Communications Society, 2008, p. 1468-1473Conference paper (Refereed)
    Abstract [en]

    Telecom Service Providers are faced with an overwhelming flow of alarms. Network administrators need to judge which alarms to resolve in order to maintain the service quality. The problem is that it is hard to pick the most important alarms. Which alarms have the highest priority? A solution that automatically assigns priorities to alarms would increase the efficiency of Network Management Centers. We have prototyped a solution that uses neural networks to assign alarm priority. The neural network learns from network administrators by using the manually assigned priorities in trouble-tickets. Our tests are based on live-data from a large mobile service provider and we show that neural networks can learn to assign relevant priorities to 75% of the alarms.

  • 648.
    Kodikara, Ruwini E.
    et al.
    Centre for Distributed Systems and Software Engineering, Monash University.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Towards context aware adaptation in wireless networks2008In: Proceedings: The Second International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, UBICOMM 2008 : 29 September - 4 October 2008, Valencia, Spain / [ed] Jaime Lloret Mauri, Piscataway, NJ: IEEE Communications Society, 2008, p. 245-250Conference paper (Refereed)
    Abstract [en]

    Next generation ubiquitous computing will comprise of context aware adaptive applications and protocols. There is a need of a generic architecture to cater for the adaptation requirements of increasingly demanding real-time applications and increasing dynamic wireless networks. This paper discusses the adaptive approach supported by CA3RM-Com architecture. CA3RM-Com is the context aware architecture proposed for real-time communication in wireless networks. It addresses the context representation, context acquisition, context exchange,and context management. Specific details of the architecture and referring adaptations that CA3RM-Com can support are discussed. Moreover the extended simulation results of adaptive multi-homed Mobile IP are presented in this paper.

  • 649.
    Witt, Hendrik
    et al.
    University of Bremen.
    Lawo, Michael
    University of Bremen.
    Drugge, Mikael
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Visual feedback and different frames of reference: the impact on gesture interaction techniques for wearable computing2008In: Proceedings of the 10th international conference on Human computer interaction with mobile devices and services / [ed] Henri di Hofte; Ingrid Mulder, New York: ACM Digital Library, 2008, p. 293-300Conference paper (Refereed)
    Abstract [en]

    We present the results of an empirical study investigating the effect of visual feedback and body postures on gesture interaction techniques in a dual task setup found, for example, in wearable computing. The conducted experiment uses a novel apparatus called "Hot Wire" that allows retaining the properties of wearable computing even in laboratory environments. Visual feedback was found to impair user performance and caused users to be caught in an attention demanding closed feedback loop once presented in a head-mounted display. Even though continuous feedback was not necessary for gesture interaction, users were unable to ignore it and remain focused on the primary task. The design of an alternative gesture recognition method using a body-centric frame of reference instead of a conventional static one to improve usability, is shown to have an opposed impact both on the performance and subjective perception of users. The presence of novel devices in gesture interaction, such as data gloves, is found to be a major source of erroneous gesture recognition due to unpredictable user behavior. Our detailed result discussion provides guidelines for designing better gesture interaction.

  • 650.
    Schmidt, Mischa
    et al.
    NEC Laboratories Europe, NEC Europe Ltd., Heidelberg.
    Lamparter, Bernd
    NEC Laboratories Europe.
    Schmid, Stefan
    NEC Laboratories Europe.
    Voice Call Continuity: A Critical Step Towards All-IP Based Next Generation Networks2008In: IEEE GLOBECOM 2008, Global Telecommunications Conference,: New Orleans, Nov. 30 2008-Dec. 4 2008, Piscataway, NJ: IEEE Communications Society, 2008, p. 1-5Conference paper (Refereed)
    Abstract [en]

    The recent developments in the fixed and mobile telecommunication industry, namely the rapid penetration of broadband access and new charging models in the broadband market in conjunction with the success of wireless local area networks and the general trend of fixed and mobile convergence, are transforming the telecommunication landscape. One of the main challenges is to integrate the fixed and mobile technologies in a way that leverages the strengths of different technologies and improves the service experience for the end user. A crucial step for this transformation is to provide adequate support for users to seamlessly switch between network domains and technologies. The main contribution of this paper is a solution that allows a mobile terminal to change from the mobile radio access to the fixed/cable access provided over a local wireless network or vice versa without disrupting an active ongoing voice call. The implementation of the proposed solution was tested and evaluated in an experimental network with real voice calls.

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