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  • 551.
    Rahmani, R.
    et al.
    Department of Information Technology and Media, Mid-Sweden University.
    Kanter, T.
    Department of Information Technology and Media, Mid-Sweden University.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A self configuring fuzzy active queue management controller in heterogeneous networks2010In: ICT 2010: 2010 17th International Conference on Telecommunications, Piscataway, NJ: IEEE Communications Society, 2010, p. 634-641Conference paper (Refereed)
    Abstract [en]

    To achieve self configuring of Active Queue Management based on Fuzzy Logic Controller (FLC), we propose a Fuzzy Adaptive Active Queue Management Controller (FAAQMC). FAAQMC eliminates buffer overflow by adapting the buffer size to the required queue length with a control cycle time shorter than the mean inter-arrival time of a burst. This makes FAAQMC suitable to manage invariant burstiness or self-similar network traffic.

  • 552.
    Gaber, Mohamed Medhat
    et al.
    School of Computing, University of Portsmouth.
    Krishnaswamy, Shonali
    Centre for Distributed Systems and Software Engineering, Monash University.
    Gillick, Britt
    Centre for Distributed Systems and Software Engineering, Monash University.
    Nicoloudis, Nicholas
    Centre for Distributed Systems and Software Engineering, Monash University.
    Liono, Jonathan
    Centre for Distributed Systems and Software Engineering, Monash University.
    Taiar, Hasnain Al
    Centre for Distributed Systems and Software Engineering, Monash University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Adaptive clutter-aware visualization for mobile data stream mining2010In: 22nd International Conference on Tools with Artificial Intelligence: proceedings : 27-29 October 2010, Arras, France, Los Alamitos, Calif: IEEE Communications Society, 2010, p. 304-311Conference paper (Refereed)
    Abstract [en]

    There is an emerging focus on real-time data stream analysis on mobile devices. A wide range of data stream processing applications are targeted to run on mobile handheld devices with limited computational capabilities such as patient monitoring, driver monitoring, providing real-time analysis and visualization for emergency and disaster management, real-time optimization for courier pick-up and delivery etc. There are many challenges in visualization of the analysis/data stream mining results on a mobile device. These include coping with the small screen real-estate and effective presentation of highly dynamic and real-time analysis. This paper proposes a generic theory for visualization on small screens that we term Adaptive Clutter Reduction ACR. Based on ACR, we have developed and experimentally validated a novel data stream clustering result visualization technique that we term Clutter-Aware Clustering Visualizer (CACV). Experimental results on both synthetic and real datasets using the Google Andriod platform are presented proving the effectiveness of the proposed techniques.

  • 553.
    Elkotob, Muslim
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Architectural, service, and performance modeling for an IMS-MBMS-based application2010In: IEEE International Conference on Communications (ICC), Piscataway, NJ: IEEE Communications Society, 2010Conference paper (Refereed)
    Abstract [en]

    This paper describes iRide (intelligent ride), an IP Multimedia Subsystem (IMS), Multimedia Broadcast Multicast Service (MBMS), and wireless sensor network (WSN) joint application. The core contributions of iRide are: IMS and WSN architectural integration on joint data processing and signaling levels, application logic for increased road safety, and network dimensioning for scalability and performance analysis. The iRide architecture is built and prototyped using IMS standard SIP (Session Initiation Protocol) and DIAMETER signaling together with 3GPP MBMS for more efficient service handling. OPNET simulations are used to conduct network dimensioning and performance analysis. Resource management in systems such as the one presented experiences several challenges in the form of bottlenecks and multicast dynamic group sizing is used as a key technique to make resources on the downlink data planemore efficiently managed. The efficiency of the proposed model for the downlink takes on a Skellam distribution shape which is used for performance modeling.

  • 554.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Granlund, Daniel
    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.
    Bandwidth efficient mobility management for heterogeneous wireless networks2010In: 2010 7th IEEE Consumer Communications and Networking Conference: Las Vegas, Nevada, USA : 9-12 January, 2010, Piscataway, N.J: IEEE Communications Society, 2010Conference paper (Refereed)
    Abstract [en]

    An important feature of the upcoming fourth generation wireless networks is support for heterogeneous radio access technologies in combination with an all-IP type of overall architecture. Operators and users will benefit from a smooth technology transition leveraging existing investments and use a variety of access technologies simultaneously. This paper describes and evaluates an innovative mobility management scheme in such an environment. It does not require any changes to the IP stack in the mobile node and does not introduce any additional overhead to the payload traffic over air interfaces. Furthermore, it does not add any signaling overhead and outperforms existing mobility management schemes for heterogeneous environments in terms of bandwidth consumption. The architecture uses a make-before-break principle for vertical handovers and bidirectional tunneling using various tunneling mechanisms connecting mobile nodes through access networks to a home network. Also, it proposes a packet inspection routine for timely handover execution in the home network. The architecture is evaluated both through analytical calculations and experiments using a voice over IP traffic model.

  • 555.
    Kikhia, Basel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Hallberg, Josef
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    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.
    Building digital life stories for memory support2010In: International Journal of Computers in Healthcare, ISSN 1755-3199, Vol. 1, no 2, p. 161-176Article in journal (Refereed)
    Abstract [en]

    The number of persons suffering from dementia is increasing, and there is significant human and economic value to gain by enabling them to keep living independently in their homes. The top priority unmet need is for memory support. This paper introduces context-awareness and life-logging in a system using reminiscence therapy methods, embodied as an ICT memory aid for recording past, current and future activities, which can later be recalled. The tool may help build or maintain episodic memories and self-image, although evidence in this area is lacking. It is designed to also give direct and instrumental support in other priority needs areas. A prototype design is described for a system that is by necessity extremely easy to use, with a touch screen computer in the home and mobile devices for data capture and cognitive support. The main life-log entities associated with the logged activities are places, persons, personal items, and recorded media. Privacy, trust and dignity are key ethical issues.

  • 556.
    Wibisono, Waskitho
    et al.
    Caulfield School of Information Technology, Monash University.
    Ling, Sea
    Caulfield School of Information Technology, Monash University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Collaborative context management framework for mobile ad hoc network environments2010In: Proceedings of the 25th Annual ACM Symposium on Applied Computing 2010: Sierre, Switzerland, March 22 - 26, 2010, New York: ACM Digital Library, 2010, p. 558-562Conference paper (Refereed)
    Abstract [en]

    Managing context in Mobile Ad Hoc Network (MANET) environments is challenging due to environmental characteristics and limitations. Different aspects of context management such as location management, context acquisition, context quality management, context discovery and other related tasks need to be dealt with to provide reliable context management support. In this paper, we propose a new approach to context management in the MANET environments. We model contexts and situations based on Context Spaces (CS) theory and the Dempster-Shafer (DS) theory of evidences. A heuristic approach to computing the relevancy value of context information to the defined situation of context-aware applications is also proposed and developed. The relevancy value is then incorporated in the fusion mechanism based on the discount rule. We have developed a hybrid location model and integrated the approach to the model. The prototype of the framework is built based on the On-Demand Multicast Routing Protocol (ODMRP) as the underlying messaging protocol among the collaborative hosts. Finally, the implementation and experimentation issues of the prototype are discussed.

  • 557.
    Wibisono, Waskitho
    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.
    Ling, Sea
    Caulfield School of Information Technology, Monash University.
    CoMiHoC: A middleware framework for context management in MANET environment2010In: Proceedings: 24th IEEE International Conference on Advanced Information Networking and Applications : Perth, Australia 20-23 April 2010 / [ed] Elizabeth Chang, Los Alamitos, Calif: IEEE Communications Society, 2010, p. 620-627Conference paper (Refereed)
    Abstract [en]

    Advances in wireless and sensing technology and the proliferation of context-aware systems have highlighted the requirement to reduce the complexity of system development by establishing a middleware framework of context management. The middleware aims to manage different aspects of context and location management as well as situation reasoning and other related tasks. In this paper, a middleware framework of context management and situation reasoning in MANET environment is proposed. It includes components to model and reason about contexts and situations, to construct location models and estimate the relevance of contexts used for situation reasoning. We also incorporate On-Demand Multicast Routing Protocol (ODMRP) as the underlying messaging protocol among the collaborative hosts to deal with MANET communication issues. We discuss implementation and experimentation issues of the framework in personal digital assistance (PDA) devices which form the ad hoc network as proof-of-concept of the framework. Our preliminary implementation and experimentation shows the capability of the framework to work in such limited devices and to perform the designed capabilities of the middleware.

  • 558. Boytsov, Andrey
    et al.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Context prediction in pervasive computing systems: achievements and challenges2010In: Supporting real time decision-making: the role of context in decision support on the move, New York: Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 35-64Chapter in book (Other academic)
  • 559.
    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.
    Cost-efficient data collection approach using K-nearest neighbors in a 3D sensor network2010In: 11th IEEE International Conference on Mobile Data Management, MDM 2010, Piscataway, NJ: IEEE Communications Society, 2010, p. 183-188Conference paper (Refereed)
    Abstract [en]

    Sensor networks represent an important component of distributed infrastructure supplying raw data to various applications from military to healthcare. A key challenge is costefficient collection of distributed data streaming from those sensor networks. In this paper we propose the use of mobile data collectors that employ K-NN queries as a cost-efficient approach to collect data within the sensor network. We investigate a 3D sensor network and propose a cost-efficient 3D-KNN algorithm that uses minimal energy and communication overheads to compute k-nearest neighbors. The 3D-KNN algorithm uses a 3 dimensional plane rotation algorithm that maps sensor nodes on a 3D plane to a reference plane identified by the mobile data collector. We propose a cost-efficient KNN boundary estimation algorithm that computes KNN boundary based on network density. We also propose a neighbor prediction algorithm that uses distance, signal to noise ratio and mobile data collector's trajectory information to identify sensor nodes along the mobile data collector's path. We simulate the proposed 3D-KNN algorithm using GlomoSim and validate its cost efficiency by evaluating its energy efficiency and query latency. Lessons and results of extensive simulation conclude the paper

  • 560.
    Kikhia, Basel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bengtsson, Johan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Sani, Zaheer ul Hussain
    Hallberg, Josef
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
    Creating digital life stories through activity recognition with image filtering2010In: Aging friendly technology for health and independence: 8th International Conference on Smart Homes and Health Telematics, ICOST 2010, Seoul, Korea, June 22-24, 2010 ; proceedings / [ed] Yeunsook Lee, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 203-210Conference paper (Refereed)
    Abstract [en]

    This paper presents two algorithms that enables the MemoryLane system to support persons with mild dementia through creation of digital life stories. The MemoryLane system consists of a Logging Kit that captures context and image data, and a Review Client that recognizes activities and enables review of the captured data. The image filtering algorithm is based on image characteristics such as brightness, blurriness and similarity, and is a central component of the Logging Kit. The activity recognition algorithm is based on the captured contextual data together with concepts of persons and places. The initial results indicate that the MemoryLane system is technically feasible and that activity-based creation of digital life stories for persons with mild dementia is possible.

  • 561.
    Saguna, Saguna
    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.
    Chakraborty, Dipanjan
    IBM Research, India Research Lab.
    CrysP: multi-faceted activity-infused presence in emerging social networks2010In: Smart spaces and next generation Wired/Wireless networking: third Conference on Smart Spaces, ruSMART 2010, and 10th international conference, NEW2AN 2010, St. Petersburg, Russia, August 23-25, 2010 ; proceedings / [ed] Sergey Balandin; Roman Dunaytsev; Yevgeni Koucheryavy, Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 50-61Conference paper (Refereed)
    Abstract [en]

    This paper presents Crystal Presence (CrysP) approach wher- e we fuse presence and activity in the realm of social networking. CrysP functions on the basis of the activity-infused multi-faceted presence information. This information is derived from user's involvement in multiple activities at any point in time. We propose and develop the CrysP System (CrysPSys) to determine CrysP from the user and his/her environmental context information (mainly relating to user activity, moods/emotions and cognition/thoughts) and then sharing the relevant CrysP with the appropriate devices, services and social-networks (corporate, personal and interest networks) and blogs (text, micro, video, photo and voice). We also highlight the benefits and challenges faced in developing such a system. This paper proposes the architecture and its test-bed and prototype implementation.

  • 562.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Forte, Andrea G
    Columbia University.
    Schulzrinne, Henning
    Columbia University.
    Enhanced mobility support for roaming users: extending the IEEE 802.21 information service2010In: Wired/Wireless Internet Communications: 8th International Conference, WWIC 2010, Luleå, Sweden, June 1-3, 2010. Proceedings / [ed] Evgeny Osipov; Andreas Kassler; Thomas Michael Bohnert; Xavier Masip-Bruin, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 52-63Conference paper (Refereed)
    Abstract [en]

    Many cell-phones and Personal Digital Assistants (PDAs) are equipped with multiple radio interfaces. Because of this, devices need to have ways of efficiently selecting the most suitable access network across multiple technologies based on the physical location of the device as well as user-defined parameters such as cost, bandwidth, and battery consumption. The IEEE has standardized the 802.21 framework for media-independent handovers where dynamic selection of network interfaces is an important feature. This paper describes and evaluates a novel architecture which extends the IEEE 802.21 information service. The architecture is based on a three-layer structure with Location-to-Service Translation (LoST) servers, service provider servers and independent evaluator servers. Evaluator servers are populated with information on coverage and quality of service as provided by trusted users. The proposed architecture allows for competition at all levels and scales well due to its distributed nature. A prototype has been developed and is presented in the paper.

  • 563.
    Rana, Juwel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Kristiansson, Johan
    Ericsson SE.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Enriching and simplifying communication by social prioritization2010In: 2010 International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2010): Odense, Denmark, 9 - 11 August 2010 / [ed] Nasrullah Memon, Piscataway, NJ: IEEE Computer Society Press , 2010, p. 336-340Conference paper (Refereed)
    Abstract [en]

    This paper presents a framework for developing applications that harness information available on social networking sites and telecom platforms to make communication simpler and richer. The framework builds an aggregated social graph by first aggregating user's contact information from multiple communication environments and then calculating the social strength between the users, based on interaction pattern and process mining techniques. The aggregated social graph describes users communication patterns which can be used to simplify and enhance communication services by inviting users for collaboration, selecting suitable tools for communication and prioritizing information flows. The framework also enables new types of applications such as social search clients, smart dialers or contact applications. In addition, the paper also presents an prototype implementation together with an evaluation comparing methods to compute social strengths based on on-line interaction datasets

  • 564.
    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.
    Extending context spaces theory by proactive adaptation2010In: Smart spaces and next generation Wired/Wireless networking: third Conference on Smart Spaces, ruSMART 2010, and 10th international conference, NEW2AN 2010, St. Petersburg, Russia, August 23-25, 2010 ; proceedings / [ed] Sergey Balandin; Roman Dunaytsev; Yevgeni Koucheryavy, Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 1-12Conference paper (Refereed)
    Abstract [en]

    Context awareness is one of the core features of pervasive computing systems. Pervasive systems can also be improved by smart application of context prediction. This paper addresses subsequent challenge of how to act according to predicted context in order to strengthen the system. Novel reinforcement learning based architecture is proposed to overcome the drawbacks of existing approaches to proactive adaptation. Context spaces theory is used as an example of how existing context awareness systems can be enhanced to achieve proactive adaptation. This recently developed theory addresses problems related to sensors uncertainty and high-level situation reasoning and it can be enhanced to achieve efficient proactive adaptation as well. This article also discusses implementation options and possible testbed to evaluate the solutions

  • 565.
    Rahmani, R.
    et al.
    Mittuniversitetet.
    Kanter, T.
    Mittuniversitetet.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Fuzzy set-based analysis and design of AQM controller for access router in heterogeneous networks2010In: 2nd International Conference on Computational Intelligence, Communication Systems and Networks, CICSyN 2010: Liverpool; 28 July 2010 through 30 July 2010, Piscataway, NJ: IEEE Communications Society, 2010, p. 173-181Conference paper (Refereed)
    Abstract [en]

    We propose a Fuzzy Adaptive Active Queue Management Controller (FAAQMC). Its performance objectives are efficient queue utilization, regulated queuing delay, and robustness. In order to achieve efficient queue utilization, the FAAQMC controls buffer length loading of both time-varying arrival rate and departure rate. The FAAQMC regulates queuing delay by minimize buffering with small queue lengths. In order to achieve robustness the FAAQMC maintains both resource provisioning and dimensioning performance under varying network conditions including variations in the number of flows, variation in Round Trip Time (RTT), and link capacity. The FAAQMC does so by using a Transformation method with fuzzy sets as numerical representation of uncertain network parameters.

  • 566.
    Rana, Juwel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    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.
    Kristiansson, Johan
    Ericsson.
    Harnessing the cloud for mobile social networking applications2010In: International Journal of Grid and High Performance Computing, ISSN 1938-0259, Vol. 2, no 2, p. 1-11Article in journal (Refereed)
    Abstract [en]

    The cloud computing model inherently enables information from social networking services (Twitter, Facebook, LinkedIn, etc), context-based systems (location, activity, interests, etc.) and personal applications (call logs, contacts, email, calendar, etc) to be harnessed for multiple purposes. This article presents an agent-based system architecture for semantic and semi-automated applications that utilize the cloud to enrich and simplify communication services, for instance by displaying presence information, prioritizing information, and dynamically managing groups of users. The proposed architecture is based on the concept of aggregated social graphs, which are created from harnessed information about how we communicate. This article also presents challenges in achieving the envisioned architecture and introduces early prototyping results.

  • 567.
    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.
    Intelligent mobile data mules for cost-efficient sensor data collection2010In: International Journal of Next-Generation Computing, ISSN 2229-4678, E-ISSN 0976-5034, Vol. 1, no 1Article in journal (Refereed)
    Abstract [en]

    Sensor networks represent an important component of distributed pervasive infrastructure. A key challenge facing sensor networks is cost-effcient collection of data streaming from these distributed data sites. In this paper, we present a mobile data mule-based sensor data collection approach employing K-Nearest Neighbours queries. We propose a novel 3D-KNN algorithm that dynamically computes nearest sensors spread within a 3D environment around the data mule. The 3D-KNN algorithm incorporates a novel boundary estimation and neighbour selection algorithm to compute the nearest neighbour set. Further, we propose a neighbour prediction algorithm that computes sensor locations within the vicinity of the data mules' trajectory. We simulate the proposed 3D-KNN algorithm using GlomoSim validating its cost-effciency by extensive evaluations. Results of our simulations conclude the paper.

  • 568.
    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.
    Intelligent processing of K-nearest neighbors queries using mobile data collectors in a location aware 3D wireless sensor network2010In: Trends in applied intelligent systems: 23rd International Conference on Industrial Engineering and Other Applications of Applied Intelligent Systems, IEA/AIE 2010, Cordoba, Spain, June 1 - 4, 2010 ; proceedings, part III / [ed] Nicolás García-Pedrajas; Francisco Herrera; Colin Fyfe; José Manuel Benítez; Moonis Ali, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 260-270Conference paper (Refereed)
    Abstract [en]

    The increased acceptance of sensor networks into everyday pervasive environments has lead to the creation of abundant distributed resource constrained data sources. In this paper, we propose an intelligent mobile data collector-based K-Nearest Neighbor query processing algorithm namely 3D-KNN. The K-Nearest Neighbor query is an important class of query processing approach in sensor networks. The proposed algorithm is employed over a sensor network that is situated within a 3 dimensional space. We propose a novel boundary estimation algorithm which computes an energy efficient sensor boundary that encloses at least k nearest nodes. We then propose a 3D plane rotation algorithm that maps selected sensor nodes on different planes onto a reference plane and a novel k nearest neighbor selection algorithm based on node distance and signal-to-noise ratio parameters. We have implemented the 3D-KNN algorithm in GlomoSim and validate the proposed algorithm's cost efficiency by extensive performance evaluation over well defined system criteria

  • 569.
    Handurukande, Sidath
    et al.
    Network Management Lab, LM Ericsson, Athlone, Ireland.
    Wallin, Stefan
    Data Ductus Nord AB, Skellefteå, Sweden.
    Jonsson, Andreas
    Data Ductus Nord AB, Skellefteå, Sweden.
    IPTV service modeling in Magneto networks2010In: 2010 IEEE/IFIP Network Operations and Management Symposium workshops: NOMS 2010 workshops ; 19 - 23 April 2010, Osaka, Japan, Piscataway, NJ: IEEE Communications Society, 2010, p. 51-54Conference paper (Refereed)
    Abstract [en]

    One of the main steps of service assurance is service monitoring using Key Performance Indicators (KPIs) and Service Level Agreements (SLAs). We show an approach for service modeling, first starting with an abstract service model that depends on the network. And then, we show how a corresponding model can be realized using a domain specific language. This solution is able to condense various sources of service model requirements into a condense formal and executable model including service decomposition and KPI aggregation. We have described this solution in the context of Magneto project and uses IPTV as a service in our description

  • 570.
    Wiberg, Mikael
    et al.
    Umeå University, Department of Information.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Landscaping future interaction: special issue on mobile and ubiquitous multimedia2010In: IEEE Multimedia, ISSN 1070-986X, E-ISSN 1941-0166, Vol. 17, no 2, p. 12-15Article in journal (Other academic)
  • 571.
    Rana, Juwel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Kristiansson, Johan
    Ericsson Research, Luleå.
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Modeling unified interaction for communication service integration2010In: The Fourth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies: UBICOMM 2010 : October 25 - 30, 2010 - Florence, Italy / [ed] Jaime Lloret Mauri, Red Hook, NY: Curran Associates, Inc., 2010, p. 373-378Conference paper (Refereed)
    Abstract [en]

    Social network inspired communication services has made a huge success, allowing users to communicate and share information in new fashion. At the same time, telecom operator's services are becoming more open, which makes it possible to develop improved social networking services and integrate them with mobile platforms. One problem that needs to be addressed when developing such services how to fetch useful social information and make it available for the services running in the cloud or in the client devices. This paper presents a generalized on-line interaction model that collects useful information from well known social networking services, and transforms the information into unified interaction patterns, which can be utilized for social data propagation or for discovering communication patterns. Ultimately, this allows the applications to incorporate social data for enabling smarter functions. For example, the data model can be useful for presenting information about callers or adding news feeds to the classical address book, prioritizing information of the contacts, inviting user for forming micro-communities. The paper also discusses the identity problem in the social media and identifies major challenges to solve that problem

  • 572.
    Elkotob, Muslim
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
    Granlund, Daniel
    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.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Multimedia QoE optimized management using prediction and statistical learning2010In: 35th Annual IEEE Conference on Local Computer Networks: LCN 2010, Piscataway, NJ: IEEE Communications Society, 2010, p. 328-331Conference paper (Refereed)
    Abstract [en]

    In this paper, we present a scheme for flow management with heterogeneous access technologies available indoors and in a campus network such as 3G and Wi-Fi. Statistical learning is used as a key for optimizing a target variable namely video quality of experience (QoE). First we analyze the data using passive measurements to determine relationships between parameters and their impact on the main performance indicator, namely the video QoE value. The derived weights are used for performing prediction in every discrete time interval of our designed autonomic control loop to know approximately the QoE in the next time interval and be able to perform a switch to another access technology if it yields a better QoE level. This user-perspective performance optimization is in line with operator and service provider goals. QoE performance models for slow vehicular and pedestrian speeds for Wi-Fi and 3G are derived and compared as well.

  • 573.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    On access network selection models and mobility support in heterogeneous wireless networks2010Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The aim of this thesis is to define a solution offering end-users seamless mobility in a multi-radio access technology environment. Today an increasing portion of cell phones and PDAs have more than one radio access technology and wireless access networks of various types are commonly available with overlapping coverage. This creates a heterogeneous network environment in which mobile devices can use several networks in parallel. In such environment the device needs to select the best network for each application to use available networks wisely. Selecting the best network for individual applications constitutes a major core problem.The thesis proposes a host-based solution for access network selection in heterogeneous wireless networking environments. Host-based solutions use only information available in mobile devices and are independent of information available in the networks to which these devices are attached. The host-based decision mechanism proposed in this thesis takes a number of constraints into account including network characteristics and mobility patterns in terms of movement speed of the user. The thesis also proposes a solution for network-based mobility management contrasting the other proposals using a host-based approach. Finally, this thesis proposes an architecture supporting mobility for roaming users in heterogeneous environments avoiding the need for scanning the medium when performing vertical handovers.Results include reduced handover latencies achieved by allowing hosts to use multihoming, bandwidth savings on the wireless interface by removing the tunneling overhead, and handover guidance through the usage of directory-based solutions instead of scanning the medium. User-perceived quality of voice calls measured on the MOS (Mean Opinion Score) scale shows no or very little impact from the mobility support procedures proposed in this thesis. Results also include simulation models, real-world prototypes, and testbeds that all could be used in future work. The proposed solutions in this thesis are mainly evaluated using simulations and experiments with prototypes in live testbeds. Analytical methods are used to complement some results from simulations and experiments

  • 574.
    Åhlund, Christer
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Börjesson, Mikael
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Pettersson, Jan
    Brännström, Robert
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Larsson, Roger
    Johansson, Dan
    Granlund, Daniel
    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.
    Project: Sense Smart City2010Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Sense Smart City is a Swedish project designed to conduct research, create new business opportunities and sustainably increase ICT research and innovation capability with specific objective to make urban cities/areas "smarter". The project will generate new and better ICT solutions, that instrument urban areas to gather and combine information (energy, traffic, weather, events, activities, needs and oppinions) continously as well as "on-demand". This will enable city environments to become "smarter", as more adaptive and supportive environment, for its inhabitants and visitors - people as well as organisations.

  • 575.
    Mitra, Karan
    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.
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    PRONET: proactive context-aware support for mobility in heterogenous access networks2010In: 2009 IEEE 34th Conference on Local Computer Networks: LCN 2009 ; Zurich, Switzerland, 20 - 23 October 2009, Piscataway, NJ: IEEE Communications Society, 2010, p. 675-676Conference paper (Refereed)
    Abstract [en]

    This paper presents a blueprint for proactive context-aware mobility support architecture for heterogeneous access networks called PROET. In particular, we leverage upon the principles of cognitive networking to support proactive contextawareness for user-centric application adaptation via quality-ofexperience (QoE) provisioning. Our proposed architecture is built upon Port-based Multi-homed Mobile IPv6 (PM-MIPv6) solution to support several applications via path diversity. In this paper our contributions are two-fold. Firstly, we identify and present gaps in our research domain related to mobility, QoE, cognitive networks and cross-layer design. We then present our architecture for providing seamless mobility in heterogeneous access networks. Currently, we are in the process of collecting results via our test bed and prototype implementation for 802.11g and HSDPA wireless networks

  • 576. Dudarenko, Natalia
    et al.
    Rana, Juwel
    Synnes, Kåre
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Ranking algorithm by contacts priority for social communication systems2010In: Smart Spaces and Next Generation Wired/Wireless Networking: Third Conference on Smart Spaces, ruSMART 2010, and 10th International Conference, NEW2AN 2010, St. Petersburg, Russia, August 23-25, 2010. Proceedings / [ed] Sergey Balandin; Roman Dunaytsev; Yevgeni Koucheryavy, Springer Science+Business Media B.V., 2010, p. 38-49Conference paper (Refereed)
    Abstract [en]

    The paper presents the ranking algorithm by contacts with priority application for Social Communication Services. This algorithm makes it Possible to rank contacts in Different Social Communication Services by Their priority for the user, and find a preferable communication tools for everytime contact into the social graph. It Is Proposed to Determine Priorities Of The contacts Using communication history. The ranking algorithm is based on the Markov Chain Theory and Social Strength Calculation Approach. The paper exploits the Opportunities for measuring social strength for the contacts and also "prioritizes communication tools for Simplifying communication. The results are Lindsey village an example.

  • 577.
    Raphiphan, Panraphee
    et al.
    Caulfield School of Information Technology, Monash University.
    Prathombutr, Passakon
    National Electronics and Computer Technology Center (NECTEC).
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Meesad, Phayung
    Department of Teacher Training in Electrical Education, Faculty of Technical Education, King Mongkut's University of Technology North Bangkok.
    Real time traffic congestion degree computation for minor sensorless roads using cost efficient context reasoning2010In: 13th International IEEE Conference on Intelligent Transportation Systems (ITSC): Funchal, Madeira Island, Portugal, 19 - 22 September 2010, Piscataway, NJ, 2010, p. 1741-1746Conference paper (Refereed)
    Abstract [en]

    Traffic congestion is the cause of pollution and economic loss. The Real time traffic state report can alleviate this problem by assisting drivers for route planning and choosing unblocked roads. More traffic information could lead to more accurate route planning and greater awareness of traffic situations and road conditions for drivers. However, investment into sensor infrastructure for small minor roads is rarely available. In this paper, we present a cost efficient approach to compute real time traffic congestion degrees for non-sensor infrastructure roads, such as small minor roads, based on context fusion and context reasoning method. Our framework intends to utilize real time acquirable context instead of relying on traffic sensory data which made our approach suitable for insufficient sensor infrastructure environment. The evaluation throughout several experimentations conducted in Bangkok has proven the feasibility of our approach. Besides, the experimental result indicated that the methodology of our experiment can be used as an alternative cost efficient tool for infrastructure investment decision making.

  • 578.
    Sadat, Anwar
    et al.
    Monash University, Melbourne, VIC.
    Karmakar, G.C.
    Monash University, Melbourne, VIC.
    Gaber, Mohamed
    Portsmouth University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Reliable and energy efficient backup clustering scheme for wireless sensor networks2010Conference paper (Refereed)
  • 579.
    Gunasekera, Kutila
    et al.
    Faculty of Information Technology, Monash University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Krishnaswamy, Shonali
    Faculty of Information Technology, Monash University.
    Loke, Seng Wai
    Department of Computer Science & Computer Engineering, La Trobe University.
    Service oriented context-aware software agents for greater efficiency2010In: Agent and multi-agent systems: technologies and applications: 4th KES international symposium, KES-AMSTA 2010, Gdynia, Poland, June 23-25, 2010 ; proceedings / [ed] Piotr Jedrzejowicz; Ngoc Thanh Nguyen; Robert J. Howlet; Lakhmi C. Jain, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2010, p. 62-71Conference paper (Refereed)
    Abstract [en]

    Convergence of web service technology with intelligent and mobile agent technology, enhanced with context awareness, can produce a new software paradigm that will enable more efficient and effective mobile services. Traditionally, an agent has been a passive service requestor with the service processing happening at the provider's site. We propose that in some situations it would be beneficial if the agent could acquire the ability to execute the functionality provided by the service and run it locally instead of simply using the service. To this end, we build an analytical model which compares time consumption of traditional service access with that of component use. Such a model would allow an agent to dynamically select the more efficient approach. We describe experiments which compare the two approaches and discuss the results and lessons learnt

  • 580.
    Burstein, Frada
    et al.
    Monash University, Melbourne, VIC.
    Brézillon, PatrickUPMC.Zaslavsky, ArkadyLuleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Supporting real time decision-making: the role of context in decision support on the move2010Collection (editor) (Other academic)
  • 581.
    Haghighi, Pari Delir
    et al.
    Centre for Organisational and Social Informatics, Monash University.
    Burstein, Frada
    Centre for Organisational and Social Informatics, Monash University.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Arbon, Paul
    Flinders University.
    The role of domain ontology for medical emergency management in mass gatherings2010In: Bridging the Socio-technical Gap in Decision Support Systems: Challenges for the Next Decade, Amsterdam: IOS Press, 2010, p. 520-531Chapter in book (Refereed)
    Abstract [en]

    Mass gatherings are common events that typically attract large crowds of people. If such events are not properly planned, coordinated and managed with regard to health and safety issues, they can become hazardous and lead to injuries, illnesses and deaths. Conducting a safe and successful mass gathering event requires effective planning and management including the provision of timely medical care and response. To achieve these goals, there is a need for a unifying and formal model/framework of mass gatherings that can be applied across all the emergency agencies and events, and used in support of time-critical decision making for medical emergency management in this context. However, the absence of a common knowledge structure and conceptual model in Medical Emergency Management in Mass Gathering (MEMMG), acknowledged in the literature, limits our understanding of such events and impedes the effectiveness of decision support systems in these environments. In this paper, we propose domain ontology for MEMMG that represents main concepts of mass gatherings and their characteristics and relationships in a standard and formal manner. The proposed domain ontology is an instantiation and extension of DOEM (Domain Ontology for Emergency Management) that represents major generic concepts in the emergency management and can be used as information structure for the development of various emergency management decision support systems. We illustrate application of such an ontology to the classical Intelligence-Design-Choice-Implementation decision support model

  • 582.
    Seedorf, Jan
    et al.
    NEC Laboratories Europe.
    Ewald, Thilo
    NEC Laboratories Europe.
    Schmidt, Mischa
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. NEC Laboratories Europe.
    Jahanpanah, Armin
    NEC Laboratories Europe.
    Stiemerling, Martin
    NEC Laboratories Europe.
    Bąk, Andrzej
    Warsaw University of Technology.
    Pilarski, Marcin
    Warsaw University of Technology.
    Kopertowski, Zbigniew
    Orange Labs Warsaw.
    Towards Operator-managed P2P Content Delivery with Application Layer Traffic Optimization2010Conference paper (Refereed)
    Abstract [en]

    P2P technology provides a flexible and very popular way of content delivery for various services, including networked media applications. However, P2P-based content delivery generates large amount of backbone traffic. Recently, several approaches have been proposed for guiding P2P services based on operator preferences, in order to reduce the amount of costly backbone traffic generated by P2P applications. Application Layer Traffic Optimization (ALTO) is a one key approach for such managed P2P applications. In short, ALTO is a dedicated service, operated by a network operator or ISP, which can provide useful network layer information to application layer clients for improved peer selection and corresponding content delivery. This paper provides an overview of standardisation and research activities for improving P2P content delivery with ALTO which are carried out within the EU FP7 project NAPA-WINE. In particular, we give an overview on standardisation efforts, present simulation results, explain our prototypical implementation of the ALTO concept, and highlight ongoing large-scale operational trials we are currently conducting within the network of Polish Telecom and among NAPA-WINE partners

  • 583.
    Mitra, Karan
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Kodikara, Ruwini
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A context-aware architecture to facilitate vertical handoffs in 4G networks using multi-homed mobile IP2009In: The First International Conference on Next Generation Wireless Systems, 2009Conference paper (Refereed)
  • 584.
    Johansson, Dan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A survey of works and an identification of challenges within the field of context-awareness supported application mobility2009Report (Other academic)
    Abstract [en]

    The number of mobile users grows constantly; an important demand is for IT to be accessible always and everywhere. Users have gone from being stationary to mobile, accessing and using their electronic services everywhere, even while moving. But not only users can be mobile; when migrating an application from one device to another, one has achieved application mobility. As migration is often carried out in heterogeneous environments, applications have to be able to receive and manage input from the user and the surroundings. Taking interfaces and gathered information about the context (defined as any information that can be used to characterize the situation of an entity) with them while migrating, the notion of context-awareness supported application mobility has become a reality, and this would indeed enhance the field of ubiquitous computing, where the vision is often hidden, yet always accessible applications. The purpose of this survey is twofold: to compile previous work on context-awareness supported application mobility and to identify challenges connected to the area. The challenges that are identified concern how to identify and keep track of applications that move between devices; how to best design the model for context-awareness; how to attain and communicate a good enough context quality; how to achieve seamlessness and minimize downtime while executing a migration; and finally how to handle heterogeneity within and between devices, in shape of differences in hardware and software.

  • 585.
    Granlund, Daniel
    et al.
    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.
    Elkotob, Muslim
    Åhlund, Christer
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A uniform AAA handling scheme for heterogeneous networking environments2009In: 2009 IEEE 34th Conference on Local Computer Networks: LCN 2009 ; Zurich, Switzerland, 20 - 23 October 2009 ;, Piscataway, NJ: IEEE Communications Society, 2009, p. 683-687Conference paper (Refereed)
    Abstract [en]

    Starting with an efficient mobility management scheme for heterogeneous wireless networks, this paper proposes a solution for AAA handling using a common database for storing user information. Regardless of the access technology selected, user@realm identities are used for authentication, authorization, and accounting. In particular, a new function is introduced in which port-based network access control is used in combination with dynamic host configuration protocol mechanisms for IP address allocation. This way, PPP-based and Ethernet-based access technologies are handled uniformly.Advantages with the proposed solution include: using only standardized mechanisms in the mobile node, as well as in the access networks. Only an additional plug-in in the AAA server (located in the access networks) needs to be deployed.The proposed AAA architecture has been implemented and evaluated in a live experimental environment. Results show authentication and authorization to perform efficiently and seamlessly.

  • 586.
    Wallin, Stefan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Alarm and service monitoring of large scale multi-service mobile networks2009Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Two of the most important challenges in network service assurance are * an overwhelming flow of low-quality alarms * to understand the structure and quality of the delivered services This thesis proposes solutions for alarm and service monitoring that addresses monitoring of large scale multi-service mobile networks. The work on alarms are based on statistical analysis of data collected from a real-world alarm flow and an associated trouble ticket database containing the network administrators expert knowledge. Using data from the trouble ticketing system as a reference, we examine the relationship between the original alarm severity and the human perception of the alarm priority. Using this knowledge, we suggest a neural network-based approach for alarm prioritization. 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 na¨ıve approach. In order to model and monitor the services this thesis 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. We show that the proposed system is a good match against real-world scenarios with special requirements around service modeling.

  • 587.
    Rana, Juwel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Kristiansson, Johan
    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.
    An architecture for mobile social networking applications2009In: 2009 First International Conference on Computational Intelligence, Modelling and Simulation, (CSSim 2009): Brno, Czech Republic, 7 - 9 September 2009 / [ed] Jiri Kunovský, Piscataway, NJ: IEEE Communications Society, 2009, p. 241-246Conference paper (Refereed)
    Abstract [en]

    Mobile semantic Web provides a new way of developing context-aware social networking applications. Social networking applications are changing the way of communication by using userpsilas context-information. For example, micro-blogging has become a smart way of conveying the current situation and activity by using user context. There is currently a significant difference between using social networking applications on a static computer compared to a mobile device, even if current mobile devices are powerful and have good connectivity. The difference is primarily related to the mobility aspect since the user contexts may change more frequently and the user may not be able to interact with the mobile device. In this paper we identify common characteristics of current social networking applications and how they attract users. Finally, we propose an agent-based system architecture that is based on a distributed platform for developing semantic and semi-automated mobile social networking applications.

  • 588.
    Rana, Juwel
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Kristiansson, Johan
    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.
    Challenges for mobile social networking applications2009In: Communications Infrastructure. Systems and Applications in Europe: first international ICST conference, EuropeComm 2009, London, UK, August 11-13, 2009 : revised selected papers / [ed] Rashid Mehmood, Berlin: Springer Science+Business Media B.V., 2009, p. 275-285Conference paper (Refereed)
    Abstract [en]

    This paper presents work in progress regarding utilization of social network information for mobile applications. Primarily a number of challenges are identified, such as how to mine data from multiple social networks, how to integrate and consolidate social networks, and how to manage semantic information for mobile applications. The challenges are discussed from a semantic Web perspective using a driving scenario as motivation.The main objective is to enable mobile applications to benefit from semantic information obtained from Web services, mobile devices, or the surrounding environment. The goal is therefore to create a framework that enables integration of semantic information (location, activity, interests, etc) with social network data (from Twitter, FaceBook, LinkedIn, etc) to facilitate intelligent yet easy to use communication tools for individual persons as well as groups of persons. An ultimate goal is to make complex communication simple through utilization of semantic information and social network data for pervasive services in mobile devices.

  • 589.
    Wallin, Stefan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Data Ductus Sweden, Skellefteå, Sweden.
    Chasing a definition of "alarm"2009In: Journal of Network and Systems Management, ISSN 1064-7570, E-ISSN 1573-7705, Vol. 17, no 4, p. 457-481Article in journal (Refereed)
    Abstract [en]

    Alarm management has been around for decades in telecom solutions. We have seen various efforts to define standardised alarm interfaces. The research community has focused on various alarm correlation strategies. Still, after years of effort in industry and research alike, network administrators are flooded with alarms; alarms are suffering from poor information quality; and the costs of alarm integration have not decreased. In this paper, we explore the concept of 'alarm'. We define 'alarm' and alarm-type concepts by investigating the different definitions currently in use in standards and research efforts. Based on statistical alarm data from a mobile operator we argue that operational and capital expenditures would decrease if alarm sources would apply to our alarm model.

  • 590.
    Kodikara, Ruwini
    et al.
    Monash University, Melbourne, VIC.
    Zaslavsky, Arkady
    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.
    Context modelling for crosslayer context aware adaptations2009In: International Journal On Advances in Networks and Services, ISSN 1942-2644, E-ISSN 1942-2644, Vol. 2, no 1, p. 63-75Article in journal (Refereed)
    Abstract [en]

    Demand for real-time services over the Internet while moving, is growing rapidly. This necessitates efficient delivery of wireless real-time traffic. Limitations of existing layered protocol stack for wireless networks lead to the proposal of cross-layer interactions as an alternative solution. At the same time, next generation ubiquitous computing drives wireless applications and protocols to be context aware. A generic context aware architecture with context modeling can aid increasingly demanding realtime applications over highly dynamic wireless networks to be cross-layer context aware and adaptive. Moreover, a generic architecture can make lower layer protocols to be context aware and adaptive to various situations dynamically. This article discusses the adaptive approach supported by proposed cross layer context aware architecture called CA3RM-Com. The scope of this article is to discuss context modeling specifically and address the issue of context representation of multi-layer context for various adaptive situations. Various single layer and multi-layer crosslayer adaptations and the representation of context parameters with respect to each layer of the protocol stack is discussed. We discuss how these adaptations can be operated in the proposed CA3RM-Com architecture. Context aware adaptive multi-homed Mobile IP is discussed as an example adaptation that the architecture can support. Moreover, the extended simulation of context aware adaptive multi-homed Mobile IP is discussed.

  • 591.
    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.

  • 592. 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.

  • 593.
    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

  • 594.
    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.

  • 595.
    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.

  • 596.
    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

  • 597.
    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)
  • 598.
    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

  • 599.
    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.

  • 600.
    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.

9101112131415 551 - 600 of 803
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