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  • 1.
    Abdelaziz, Ahmed
    et al.
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Ang, Tanfong
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Sookhak, Mehdi
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Khan, Suleman
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Liew, Cheesun
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Akhunzada, Adnan
    Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur.
    Survey on network virtualization using openflow: Taxonomy, opportunities, and open issues2016In: KSII Transactions on Internet and Information Systems, ISSN 1976-7277, Vol. 10, no 10, 4902-4932 p.Article in journal (Refereed)
    Abstract [en]

    The popularity of network virtualization has recently regained considerable momentum because of the emergence of OpenFlow technology. It is essentially decouples a data plane from a control plane and promotes hardware programmability. Subsequently, OpenFlow facilitates the implementation of network virtualization. This study aims to provide an overview of different approaches to create a virtual network using OpenFlow technology. The paper also presents the OpenFlow components to compare conventional network architecture with OpenFlow network architecture, particularly in terms of the virtualization. A thematic OpenFlow network virtualization taxonomy is devised to categorize network virtualization approaches. Several testbeds that support OpenFlow network virtualization are discussed with case studies to show the capabilities of OpenFlow virtualization. Moreover, the advantages of popular OpenFlow controllers that are designed to enhance network virtualization is compared and analyzed. Finally, we present key research challenges that mainly focus on security, scalability, reliability, isolation, and monitoring in the OpenFlow virtual environment. Numerous potential directions to tackle the problems related to OpenFlow network virtualization are likewise discussed

  • 2.
    Abd-Ellah, Mahmoud Khaled
    et al.
    Al-Madina Higher Institute for Engineering and Technology.
    Awad, Ali Ismail
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Khalaf, Ashraf A. M.
    Minia University, Egypt.
    Hamed, Hesham F. A.
    Minia University, Egypt.
    Classification of Brain Tumor MRIs Using a Kernel Support Vector Machine2016In: Building Sustainable Health Ecosystems: 6th International Conference on Well-Being in the Information Society, WIS 2016, Tampere, Finland, September 16-18, 2016, Proceedings / [ed] Hongxiu Li, Pirkko Nykänen, Reima Suomi, Nilmini Wickramasinghe, Gunilla Widén, Ming Zhan, Springer International Publishing , 2016, 151-160 p.Conference paper (Refereed)
    Abstract [en]

    The use of medical images has been continuously increasing, which makes manual investigations of every image a difficult task. This study focuses on classifying brain magnetic resonance images (MRIs) as normal, where a brain tumor is absent, or as abnormal, where a brain tumor is present. A hybrid intelligent system for automatic brain tumor detection and MRI classification is proposed. This system assists radiologists in interpreting the MRIs, improves the brain tumor diagnostic accuracy, and directs the focus toward the abnormal images only. The proposed computer-aided diagnosis (CAD) system consists of five steps: MRI preprocessing to remove the background noise, image segmentation by combining Otsu binarization and K-means clustering, feature extraction using the discrete wavelet transform (DWT) approach, and dimensionality reduction of the features by applying the principal component analysis (PCA) method. The major features were submitted to a kernel support vector machine (KSVM) for performing the MRI classification. The performance evaluation of the proposed system measured a maximum classification accuracy of 100 % using an available MRIs database. The processing time for all processes was recorded as 1.23 seconds. The obtained results have demonstrated the superiority of the proposed system.

  • 3.
    Abd-Ellah, Mahmoud Khaled
    et al.
    Electronic and Communication Department Al-Madina Higher Institute for Engineering and Technology, Giza.
    Awad, Ali Ismail
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Khalaf, Ashraf A. M.
    Faculty of Engineering, Minia University.
    Hamed, Hesham F. A.
    Faculty of Engineering, Minia University.
    Design and implementation of a computer-aided diagnosis system for brain tumor classification2017In: 2016 28th International Conference on Microelectronics (ICM), 2017, 73-76 p., 7847911Conference paper (Refereed)
    Abstract [en]

    Computer-aided diagnosis (CAD) systems have become very important for the medical diagnosis of brain tumors. The systems improve the diagnostic accuracy and reduce the required time. In this paper, a two-stage CAD system has been developed for automatic detection and classification of brain tumor through magnetic resonance images (MRIs). In the first stage, the system classifies brain tumor MRI into normal and abnormal images. In the second stage, the type of tumor is classified as benign (Noncancerous) or malignant (Cancerous) from the abnormal MRIs. The proposed CAD ensembles the following computational methods: MRI image segmentation by K-means clustering, feature extraction using discrete wavelet transform (DWT), feature reduction by applying principal component analysis (PCA). The two-stage classification has been conducted using a support vector machine (SVM). Performance evaluation of the proposed CAD has achieved promising results using a non-standard MRIs database.

  • 4.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology Chittagong.
    Chowdhury, Abu Sayeed
    University of Science and Technology Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Karim, Razuan
    University of Science and Technology Chittagong.
    An Interoperable IP based WSN for Smart Irrigation Systems2017Conference paper (Refereed)
    Abstract [en]

    Wireless Sensor Networks (WSN) have been highly developed which can be used in agriculture to enable optimal irrigation scheduling. Since there is an absence of widely used available methods to support effective agriculture practice in different weather conditions, WSN technology can be used to optimise irrigation in the crop fields. This paper presents architecture of an irrigation system by incorporating interoperable IP based WSN, which uses the protocol stacks and standard of the Internet of Things paradigm. The performance of fundamental issues of this network is emulated in Tmote Sky for 6LoWPAN over IEEE 802.15.4 radio link using the Contiki OS and the Cooja simulator. The simulated results of the performance of the WSN architecture presents the Round Trip Time (RTT) as well as the packet loss of different packet size. In addition, the average power consumption and the radio duty cycle of the sensors are studied. This will facilitate the deployment of a scalable and interoperable multi hop WSN, positioning of border router and to manage power consumption of the sensors.

  • 5.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology, Chittagong.
    Paul, Sukanta
    University of Science and Technology, Chittagong.
    Akhter, Sharmin
    University of Science and Technology, Chittagong.
    Siddiquee, Kazy Noor E Alam
    University of Science and Technology, Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Selection of Energy Efficient Routing Protocol for Irrigation Enabled by Wireless Sensor Networks2017In: Proceedings of 2017 IEEE 42nd Conference on Local Computer Networks Workshops, 445 Hoes Lane, P.O. Box 133, Piscataway, NJ 08855-1331, 2017, 75-81 p.Conference paper (Refereed)
    Abstract [en]

    Wireless Sensor Networks (WSNs) are playing remarkable contribution in real time decision making by actuating the surroundings of environment. As a consequence, the contemporary agriculture is now using WSNs technology for better crop production, such as irrigation scheduling based on moisture level data sensed by the sensors. Since WSNs are deployed in constraints environments, the life time of sensors is very crucial for normal operation of the networks. In this regard routing protocol is a prime factor for the prolonged life time of sensors. This research focuses the performances analysis of some clustering based routing protocols to select the best routing protocol. Four algorithms are considered, namely Low Energy Adaptive Clustering Hierarchy (LEACH), Threshold Sensitive Energy Efficient sensor Network (TEEN), Stable Election Protocol (SEP) and Energy Aware Multi Hop Multi Path (EAMMH). The simulation is carried out in Matlab framework by using the mathematical models of those algortihms in heterogeneous environment. The performance metrics which are considered are stability period, network lifetime, number of dead nodes per round, number of cluster heads (CH) per round, throughput and average residual energy of node. The experimental results illustrate that TEEN provides greater stable region and lifetime than the others while SEP ensures more througput.

  • 6.
    Abrishambaf, Reza
    et al.
    Department of Engineering Technology Miami University Hamilton, OH.
    Bal, Mert
    Department of Engineering Technology Miami University Hamilton, OH.
    Vyatkin, Valeriy
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Distributed Home Automation System Based on IEC 61499 Function Blocks and Wireless Sensor Networks2017In: 2017 IEEE International Conference on Industrial Technology (ICIT), Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017, 1354-1359 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, a distributed home automation system will be demonstrated. Traditional systems are based on a central controller where all the decisions are made. The proposed control architecture is a solution to overcome the problems such as the lack of flexibility and re-configurability that most of the conventional systems have. This has been achieved by employing a method based on the new IEC 61499 function block standard, which is proposed for distributed control systems. This paper also proposes a wireless sensor network as the system infrastructure in addition to the function blocks in order to implement the Internet-of-Things technology into the area of home automation as a solution for distributed monitoring and control. The proposed system has been implemented in both Cyber (nxtControl) and Physical (Contiki-OS) level to show the applicability of the solution.

  • 7.
    Abrishambaf, Reza
    et al.
    Department of Engineering Technology, Miami University, Hamilton, OH.
    Bal, Mert
    Department of Engineering Technology, Miami University, Hamilton, OH.
    Vyatkin, Valeriy
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Distributed home automation system based on IEC61499 function blocks and wireless sensor networks2017In: Proceedings of the IEEE International Conference on Industrial Technology, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017, 1354-1359 p., 7915561Conference paper (Refereed)
    Abstract [en]

    In this paper, a distributed home automation system will be demonstrated. Traditional systems are based on a central controller where all the decisions are made. The proposed control architecture is a solution to overcome the problems such as the lack of flexibility and re-configurability that most of the conventional systems have. This has been achieved by employing a method based on the new IEC 61499 function block standard, which is proposed for distributed control systems. This paper also proposes a wireless sensor network as the system infrastructure in addition to the function blocks in order to implement the Internet-of-Things technology into the area of home automation as a solution for distributed monitoring and control. The proposed system has been implemented in both Cyber (nxtControl) and Physical (Contiki-OS) level to show the applicability of the solution

  • 8.
    Acharya, Soam
    et al.
    Cornell University, Ithaca.
    Smith, Brian P
    Cornell University, Ithaca.
    Parnes, Peter
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Characterizing user access to videos on the World Wide Web1999In: Multimedia computing and networking 2000 / [ed] Klara Nahrstedt, Bellingham, Wash: SPIE - International Society for Optical Engineering, 1999, 130-141 p.Conference paper (Refereed)
    Abstract [en]

    Despite evidence of rising popularity of video on the web (or VOW), little is known about how users access video. However, such a characterization can greatly benefit the design of multimedia systems such as web video proxies and VOW servers. Hence, this paper presents an analysis of trace data obtained from an ongoing VOW experiment in Lulea University of Technology, Sweden. This experiment is unique as video material is distributed over a high bandwidth network allowing users to make access decisions without the network being a major factor. Our analysis revealed a number of interesting discoveries regarding user VOW access. For example, accesses display high temporal locality: several requests for the same video title often occur within a short time span. Accesses also exhibited spatial locality of reference whereby a small number of machines accounted for a large number of overall requests. Another finding was a browsing pattern where users preview the initial portion of a video to find out if they are interested. If they like it, they continue watching, otherwise they halt it. This pattern suggests that caching the first several minutes of video data should prove effective. Lastly, the analysis shows that, contrary to previous studies, ranking of video titles by popularity did not fit a Zipfian distribution.

  • 9.
    Agreste, Santa
    et al.
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    De Meo, Pasquale
    of Ancient and Modern Civilizations, University of Messina.
    Fiumara, Giacomo
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    Piccione, Giuseppe
    Department of Mathematics and Computer Science, Physical Sciences and Earth Sciences, University of Messina.
    Piccolo, Sebastiano
    Department of Management Engineering - Engineering Systems Division at the Technical University of Denmark.
    Rosaci, Domenico
    DIIES Department, University of Reggio Calabria Via Graziella.
    Sarné, Giuseppe M. L.
    DICEAM Department, University of Reggio Calabria Via Graziella.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    An empirical comparison of algorithms to findcommunities in directed graphs and theirapplication in Web Data Analytics2017In: IEEE Transactions on Big Data, E-ISSN 2332-7790, Vol. 3, no 3, 289-306 p.Article in journal (Refereed)
    Abstract [en]

    Detecting communities in graphs is a fundamental tool to understand the structure of Web-based systems and predict their evolution. Many community detection algorithms are designed to process undirected graphs (i.e., graphs with bidirectional edges) but many graphs on the Web - e.g. microblogging Web sites, trust networks or the Web graph itself - are often directed. Few community detection algorithms deal with directed graphs but we lack their experimental comparison. In this paper we evaluated some community detection algorithms across accuracy and scalability. A first group of algorithms (Label Propagation and Infomap) are explicitly designed to manage directed graphs while a second group (e.g., WalkTrap) simply ignores edge directionality; finally, a third group of algorithms (e.g., Eigenvector) maps input graphs onto undirected ones and extracts communities from the symmetrized version of the input graph. We ran our tests on both artificial and real graphs and, on artificial graphs, WalkTrap achieved the highest accuracy, closely followed by other algorithms; Label Propagation has outstanding performance in scalability on both artificial and real graphs. The Infomap algorithm showcased the best trade-off between accuracy and computational performance and, therefore, it has to be considered as a promising tool for Web Data Analytics purposes.

  • 10.
    Ahmad, Iftikhar
    et al.
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Noor, Rafidah Md
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Ali, Ihsan
    Faculty of Computer Science & Information Technology, University of Malaya, Kuala Lumpur.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Characterizing the role of vehicular cloud computing in road traffic management2017In: International Journal of Distributed Sensor Networks, ISSN 1550-1329, E-ISSN 1550-1477, Vol. 13, no 5Article in journal (Refereed)
    Abstract [en]

    Vehicular cloud computing is envisioned to deliver services that provide traffic safety and efficiency to vehicles. Vehicular cloud computing has great potential to change the contemporary vehicular communication paradigm. Explicitly, the underutilized resources of vehicles can be shared with other vehicles to manage traffic during congestion. These resources include but are not limited to storage, computing power, and Internet connectivity. This study reviews current traffic management systems to analyze the role and significance of vehicular cloud computing in road traffic management. First, an abstraction of the vehicular cloud infrastructure in an urban scenario is presented to explore the vehicular cloud computing process. A taxonomy of vehicular clouds that defines the cloud formation, integration types, and services is presented. A taxonomy of vehicular cloud services is also provided to explore the object types involved and their positions within the vehicular cloud. A comparison of the current state-of-the-art traffic management systems is performed in terms of parameters, such as vehicular ad hoc network infrastructure, Internet dependency, cloud management, scalability, traffic flow control, and emerging services. Potential future challenges and emerging technologies, such as the Internet of vehicles and its incorporation in traffic congestion control, are also discussed. Vehicular cloud computing is envisioned to have a substantial role in the development of smart traffic management solutions and in emerging Internet of vehicles

  • 11.
    Ahmed, Ejaz
    et al.
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Yaqoob, Ibrar
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Targio Hashem, Ibrahim Abaker
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Khan, Imran
    Schneider Electric Industries, Grenoble.
    Ahmed, Abdelmuttlib Ibrahim Abdalla
    The Centre for Mobile Cloud Computing Research, Faculty of Computer Science and Information Technology, University of Malaya.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    The role of big data analytics in Internet of Things2017In: Computer Networks, ISSN 1389-1286, E-ISSN 1872-7069Article in journal (Refereed)
    Abstract [en]

    The explosive growth in the number of devices connected to the Internet of Things (IoT) and the exponential increase in data consumption only reflect how the growth of big data perfectly overlaps with that of IoT. The management of big data in a continuously expanding network gives rise to non-trivial concerns regarding data collection efficiency, data processing, analytics, and security. To address these concerns, researchers have examined the challenges associated with the successful deployment of IoT. Despite the large number of studies on big data, analytics, and IoT, the convergence of these areas creates several opportunities for flourishing big data and analytics for IoT systems. In this paper, we explore the recent advances in big data analytics for IoT systems as well as the key requirements for managing big data and for enabling analytics in an IoT environment. We taxonomized the literature based on important parameters. We identify the opportunities resulting from the convergence of big data, analytics, and IoT as well as discuss the role of big data analytics in IoT applications. Finally, several open challenges are presented as future research directions.

  • 12.
    Akbar, Mariam
    et al.
    COMSATS Institute of Information Technology, Islamabad.
    Javaid, Nadeem
    COMSATS Institute of Information Technology, Islamabad.
    Kahn, Ayesha Hussain
    COMSATS Institute of Information Technology, Islamabad.
    Imran, Muhammad Al
    College of Computer and Information Sciences, Almuzahmiyah, King Saud University.
    Shoaib, Muhammad
    College of Computer and Information Sciences, Almuzahmiyah, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Efficient Data Gathering in 3D Linear Underwater Wireless Sensor Networks Using Sink Mobility2016In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 16, no 3, 404Article in journal (Refereed)
    Abstract [en]

    Due to the unpleasant and unpredictable underwater environment, designing an energy-efficient routing protocol for underwater wireless sensor networks (UWSNs) demands more accuracy and extra computations. In the proposed scheme, we introduce a mobile sink (MS), i.e., an autonomous underwater vehicle (AUV), and also courier nodes (CNs), to minimize the energy consumption of nodes. MS and CNs stop at specific stops for data gathering; later on, CNs forward the received data to the MS for further transmission. By the mobility of CNs and MS, the overall energy consumption of nodes is minimized. We perform simulations to investigate the performance of the proposed scheme and compare it to preexisting techniques. Simulation results are compared in terms of network lifetime, throughput, path loss, transmission loss and packet drop ratio. The results show that the proposed technique performs better in terms of network lifetime, throughput, path loss and scalability

  • 13.
    Akkaya, Kemal
    et al.
    Southern Illinois University.
    Aust, Stefan
    NEC Communication Systems, Ltd..
    Hollick, Matthias
    TU Darmstadt.
    Itaya, Satoko
    Smart Wireless Laboratory, NICT.
    Kantarci, Burak
    University of Ottawa.
    Pfeiffer, Tom
    TU Berlin.
    Senel, Fatih
    International Antalya University.
    Strayer, Tim
    BBN Technologies.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Message from the demonstrations chair2014Conference paper (Other academic)
    Abstract [en]

    It is my pleasure to welcome you to the sixth Demonstration Session at the IEEE Conference on Local Computer Networks (LCN) 2014. We were looking for demonstrations for all topics covered by the main conference as well as all the workshops held in conjunction with the conference. The technical demonstrations were strongly encouraged to show innovative and original research. The main purpose of the demo session is to provide demonstrations that validate important research issues and/or show innovative prototypes.

  • 14.
    Alakärppä, Ismo
    et al.
    University of Lapland, Rovaniemi.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Hosio, Simo
    University of Oulu.
    Johansson, Dan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Ojala, Timo
    University of Oulu.
    NIMO overall architecture and service enablers2014Report (Other academic)
    Abstract [en]

    This article describes the architecture and service enablers developed in the NIMO project. Furthermore, it identifies future challenges and knowledge gaps in upcoming ICT service development for public sector units empowering citizens with enhanced tools for interaction and participation. We foresee crowdsourced applications where citizens contribute with dynamic, timely and geographically spread gathered information.

  • 15.
    Alam, Quratulain
    et al.
    Department of Computer Sciences, Institute of Management Sciences, Peshawar.
    Tabbasum, Saher
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Malik, Saif U.R.
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Malik, Masoom
    Department of Computer Sciences, COMSATS Institute of Information Technology, Islamabad.
    Ali, Tamleek
    Department of Computer Sciences, Institute of Management Sciences, Peshawar.
    Akhunzada, Adnan
    Center for Mobile Cloud Computing Research (C4MCCR), University of Malaya, 50603 Kuala Lumpur.
    Khan, Samee U.
    Department of electrical and computer engineering, North Dakota State University, Fargo, ND.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Buyya, Rajkumar
    Cloud Computing and Distributed Systems, (CLOUDS) Laboratory, Department of Computing and Information Systems, The University of Melbourne.
    Formal Verification of the xDAuth Protocol2016In: IEEE Transactions on Information Forensics and Security, ISSN 1556-6013, E-ISSN 1556-6021, Vol. 11, no 9, 1956-1969 p.Article in journal (Refereed)
    Abstract [en]

    Service Oriented Architecture (SOA) offers a flexible paradigm for information flow among collaborating organizations. As information moves out of an organization boundary, various security concerns may arise, such as confidentiality, integrity, and authenticity that needs to be addressed. Moreover, verifying the correctness of the communication protocol is also an important factor. This paper focuses on the formal verification of the xDAuth protocol, which is one of the prominent protocols for identity management in cross domain scenarios. We have modeled the information flow of xDAuth protocol using High Level Petri Nets (HLPN) to understand protocol information flow in a distributed environment. We analyze the rules of information flow using Z language while Z3 SMT solver is used for verification of the model. Our formal analysis and verification results reveal the fact that the protocol fulfills its intended purpose and provides the security for the defined protocol specific properties, e.g. secure secret key authentication, Chinese wall security policy and secrecy specific properties, e.g. confidentiality, integrity, authenticity.

  • 16.
    Al-Dulaimi, Anwer
    et al.
    ECE, University of Toronto.
    Anpalagan, Alagan
    WINCORE Lab, Ryerson University, Toronto.
    Bennis, Mehdi
    University of Oulu, Centre for Wireless Communications, University of Oulu.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    5G Green Communications: C-RAN Provisioning of CoMP and Femtocells for Power Management2016In: 2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB): Montreal, Canada, 4-7 October 2015, Piscataway, NJ: IEEE Communications Society, 2016, 7324392Conference paper (Refereed)
    Abstract [en]

    The fifth generation (5G) wireless network is expected to have dense deployments of cells in order to provide efficient Internet and cellular connections. The cloud radio access network (C-RAN) emerges as one of the 5G solutions to steer the network architecture and control resources beyond the legacy radio access technologies. The C-RAN decouples the traffic management operations from the radio access technologies leading to a new combination of virtualized network core and fronthaul architecture. In this paper, we first investigate the power consumption impact due to the aggressive deployments of low-power neighborhood femtocell networks (NFNs) under the umbrella of a coordinated multipoint (CoMP) macrocell. We show that power savings obtained from employing low power NFN start to decline as the density of deployed femtocells exceed certain threshold. The analysis considers two CoMP sites at the cell-edge and intra-cell areas. Second, to restore the power efficiency and network stabilization, a C-RAN model is proposed to restructure the NFN into clusters to ease the energy burden in the evolving 5G systems. Tailoring this to traffic load, selected clusters will be switched off to save power when they operate with low traffic loads

  • 17.
    Alhamazani, Khalid
    et al.
    University of New South Wales, Sydney.
    Ranjan, Rajiv
    CSIRO, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Rabhi, Fethi
    University of New South Wales, Sydney.
    Jayaraman, Prem Prakash
    CSIRO, Canberra.
    Khan, Samee Ullah
    North Dakota State University, Fargo.
    Guabtni, Adnene
    NICTA, Sydney.
    Bhatnagar, Vasudha
    University of Delhi.
    An overview of the commercial cloud monitoring tools: research dimensions, design issues, and state-of-the-art2015In: Computing, ISSN 0010-485X, E-ISSN 1436-5057, Vol. 97, no 4, 357-377 p.Article in journal (Refereed)
    Abstract [en]

    Cloud monitoring activity involves dynamically tracking the Quality of Service (QoS) parameters related to virtualized resources (e.g., VM, storage, network, appliances, etc.), the physical resources they share, the applications running on them and data hosted on them. Applications and resources configuration in cloud computing environment is quite challenging considering a large number of heterogeneous cloud resources. Further, considering the fact that at given point of time, there may be need to change cloud resource configuration (number of VMs, types of VMs, number of appliance instances, etc.) for meet application QoS requirements under uncertainties (resource failure, resource overload, workload spike, etc.). Hence, cloud monitoring tools can assist a cloud providers or application developers in: (i) keeping their resources and applications operating at peak efficiency, (ii) detecting variations in resource and application performance, (iii) accounting the service level agreement violations of certain QoS parameters, and (iv) tracking the leave and join operations of cloud resources due to failures and other dynamic configuration changes. In this paper, we identify and discuss the major research dimensions and design issues related to engineering cloud monitoring tools. We further discuss how the aforementioned research dimensions and design issues are handled by current academic research as well as by commercial monitoring tools.

  • 18.
    Alhamazani, Khalid
    et al.
    School of Computer Science and Engineering, University of New South Wales.
    Ranjan, Rajiv
    CSIRO Digital Productivity, Acton.
    Jayaraman, Prem
    CSIRO Digital Productivity, Acton.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Liu, Chang
    Sydney University of Technology.
    Rabhi, Fethi
    School of Computer Science and Engineering, University of New South Wales.
    Georgakopoulos, Dimitrios
    Royal Melbourne Institute of Technology, Melbourne.
    Wang, Lizhe
    Chinese Academy of Sciences, Beijing.
    Cross-Layer Multi-Cloud Real-Time Application QoS Monitoring and Benchmarking As-a-Service Framework2016In: I E E E Transactions on Cloud Computing, ISSN 2168-7161Article in journal (Refereed)
    Abstract [en]

    Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers and data processing frameworks) platforms with features such as elasticity, pay-per-use, low upfront investment and low time to market. This has led to the proliferation of business critical applications that leverage various cloud platforms. Such applications hosted on single/multiple cloud provider platforms have diverse characteristics requiring extensive monitoring and benchmarking mechanisms to ensure run-time Quality of Service (QoS) (e.g., latency and throughput). This paper proposes, develops and validates CLAMBS—Cross-Layer Multi Cloud Application Monitoring and Benchmarking as-a-Service for efficient QoS monitoring and benchmarking of cloud applications hosted on multi-clouds environments. The major highlight of CLAMBS is its capability of monitoring and benchmarking individual application components such as databases and web servers, distributed across cloud layers (*-aaS), spread among multiple cloud providers. We validate CLAMBS using prototype implementation and extensive experimentation and show that CLAMBS efficiently monitors and benchmarks application components on multi-cloud platforms including Amazon EC2 and Microsoft Azure.  

  • 19.
    Alhamazani, Khalid
    et al.
    School of Computer Science and Engineering, University of New South Wales.
    Ranjan, Rajiv
    CSIRO Computational Informatics, Canberra.
    Jayaraman, Prem Prakash
    CSIRO Computational Informatics, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Wang, Meisong
    CSIRO Computational Informatics, Canberra.
    Huang, Zhiquiang (George)
    CSIRO Computational Informatics, Canberra.
    Wang, Lizhe
    Chinese Academy of Sciences, Beijing.
    Rabhi, Fethi
    School of Computer Science and Engineering, University of New South Wales.
    Real-time QoS Monitoring for Cloud-based Big Data Analytics Application in Mobile Environments2014In: 2014 15th IEEE International Conference on Mobile Data Management (MDM 2014): Brisbane, Australia 15 -18 July 2014, Piscataway, NY: IEEE Communications Society, 2014, Vol. 1, 337-340 p., 6916940Conference paper (Refereed)
    Abstract [en]

    The service delivery model of cloud computing acts as a key enabler for big data analytics applications enhancing productivity, efficiency and reducing costs. The ever increasing flood of data generated from smart phones and sensors such as RFID readers, traffic cams etc require innovative provisioning and QoS monitoring approaches to continuously support big data analytics. To provide essential information for effective and efficient bid data analytics application QoS monitoring, in this paper we propose and develop CLAMS-Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework: (a) performs multi-cloud monitoring, and (b) addresses the issue of cross-layer monitoring of applications. We implement and demonstrate CLAMS functions on real-world multi-cloud platforms such as Amazon and Azure.

  • 20.
    Alhamazani, Khalid
    et al.
    University of New South Wales, Sydney.
    Ranjan, Rajiv
    CSIRO Computational Informatics, Canberra.
    Mitra, Karan
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Jayaraman, Prem Prakash
    CSIRO, Canberra.
    Huang, Zhiqiang
    CSIRO Computational Informatics, Canberra.
    Wang, Lizhe
    Center for Earth Observation & Digital Earth, Chinese Academy of Sciences.
    Rabhi, Fethi
    University of New South Wales, Sydney.
    CLAMS: Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework2014In: Proceedings of the 11th IEEE International Conference on Services Computing (IEEE SCC 2014), Piscataway, NJ: IEEE Communications Society, 2014, 283-290 p.Conference paper (Refereed)
    Abstract [en]

    Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers, data processing frameworks, etc.) platforms. Application services hosted on single/multiple cloud provider platforms have diverse characteristics that require extensive monitoring mechanisms to aid in controlling run-time quality of service (e.g., access latency and number of requests being served per second, etc.). To provide essential real-time information for effective and efficient cloud application quality of service (QoS) monitoring, in this paper we propose, develop and validate CLAMS—Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework is capable of: (a) performing QoS monitoring of application components (e.g., database, web server, application server, etc.) that may be deployed across multiple cloud platforms (e.g., Amazon and Azure); and (b) giving visibility into the QoS of individual application component, which is something not supported by current monitoring services and techniques. We conduct experiments on real-world multi-cloud platforms such as Amazon and Azure to empirically evaluate our framework and the results validate that CLAMS efficiently monitors applications running across multiple clouds.

  • 21.
    Al-Turjman, Fadi M.
    et al.
    Department of Computer Engineering, Middle East Technical University, Northern Cyprus Campus.
    Imran, Muhammad
    College of Computer and Information Sciences, King Saud University.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Value-Based Caching in Information-Centric Wireless Body Area Networks2017In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 17, no 1, 181Article in journal (Refereed)
    Abstract [en]

    We propose a resilient cache replacement approach based on a Value of sensed Information (VoI) policy. To resolve and fetch content when the origin is not available due to isolated in-network nodes (fragmentation) and harsh operational conditions, we exploit a content caching approach. Our approach depends on four functional parameters in sensory Wireless Body Area Networks (WBANs). These four parameters are: age of data based on periodic request, popularity of on-demand requests, communication interference cost, and the duration for which the sensor node is required to operate in active mode to capture the sensed readings. These parameters are considered together to assign a value to the cached data to retain the most valuable information in the cache for prolonged time periods. The higher the value, the longer the duration for which the data will be retained in the cache. This caching strategy provides significant availability for most valuable and difficult to retrieve data in the WBANs. Extensive simulations are performed to compare the proposed scheme against other significant caching schemes in the literature while varying critical aspects in WBANs (e.g., data popularity, cache size, publisher load, connectivity-degree, and severe probabilities of node failures). These simulation results indicate that the proposed VoI-based approach is a valid tool for the retrieval of cached content in disruptive and challenging scenarios, such as the one experienced in WBANs, since it allows the retrieval of content for a long period even while experiencing severe in-network node failures.

  • 22.
    Amadeo, Marcia
    et al.
    Universita Mediterranea di Reggio Calabria.
    Campolo, Claudia
    Universita Mediterranea di Reggio Calabria. Telecommunications.
    Quevedo, Jose
    Universidade de Aveiro, Inst Telecomunicacoes.
    Corujo, Daniel
    Universidade de Aveiro, Inst Telecomunicacoes.
    Molinaro, Antonella
    Universita Mediterranea di Reggio Calabria. Telecommunications.
    Iera, Antonio
    Universita Mediterranea di Reggio Calabria.
    Aguiar, Rui L.
    Universidade de Aveiro, Inst Telecomunicacoes.
    Vasilakos, Athanasios
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Information-Centric Networking for the Internet of Things: Challenges and Opportunities2016In: IEEE Network, ISSN 0890-8044, E-ISSN 1558-156X, Vol. 30, no 2, 92-100 p., 7437030Article in journal (Refereed)
    Abstract [en]

    In view of evolving the Internet infrastructure, ICN is promoting a communication model that is fundamentally different from the traditional IP address-centric model. The ICN approach consists of the retrieval of content by (unique) names, regardless of origin server location (i.e., IP address), application, and distribution channel, thus enabling in-network caching/replication and content-based security. The expected benefits in terms of improved data dissemination efficiency and robustness in challenging communication scenarios indicate the high potential of ICN as an innovative networking paradigm in the IoT domain. IoT is a challenging environment, mainly due to the high number of heterogeneous and potentially constrained networked devices, and unique and heavy traffic patterns. The application of ICN principles in such a context opens new opportunities, while requiring careful design choices. This article critically discusses potential ways toward this goal by surveying the current literature after presenting several possible motivations for the introduction of ICN in the context of IoT. Major challenges and opportunities are also highlighted, serving as guidelines for progress beyond the state of the art in this timely and increasingly relevant topic.

  • 23.
    Andersson, Ingemar
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Lindqvist, Göran
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Randers, Frode
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Preservation Services Planning: A Decision Support Framework2014Conference paper (Refereed)
    Abstract [en]

    Commercial organizations are experiencing a growing need to access business-criticaldata in the longer term of their operations. Governmental regulations as well as commercial interestsinfluence this need. Organizations are willing to procure cost-effective services to this end - servicesthat are increasingly based as public or private cloud solutions. With the advent of autonomous cloudservices comes the possibility to assemble (mix and match) preservation services in a workflowbasedservice-oriented solution. Following the interaction with information managers in (three)commercial organizations operating in different markets and after a review of current literature, wehave revealed a lack of comprehensive guidelines and decision support in service selection as part ofpreservation planning. Existing models and frameworks used for assessing the quality of preservationservices either manage performance-based features that service provider’s offer or the technicaldetails of the preservation actions themselves. In this paper we present our preservation-planningframework (Preserv-Qual) that addresses the need for decision support in the selection ofpreservation services that explicitly acknowledge the differences among aspects of information usewithin an organization. We describe the outcome from an evaluation of the framework in threecommercial organisations as a service quality assessment and decision support tool. This papershows how our framework supports the use of existing and proven methods, models and principlesfor service assessment, digital preservation and decision support.

  • 24.
    Andersson, Ingemar
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Nilsson, Jörgen
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Lindqvist, Göran
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Lindbäck, Lena
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Runardotter, Mari
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Innovation and Design.
    Web archiving using the collaborative archiving services testbed2011In: eChallenges e2011 Conference Proceedings / [ed] Paul Cunningham; Miriam Cunningham, IIMC International Information Management Corporation , 2011Conference paper (Other academic)
    Abstract [en]

    Websites constitute one category of official records and as such should be preserved for the long term in compliance with Swedish legislation. Collaborative Archiving Services Testbed (CAST) supports actors involved in the selective web archiving process, from harvesting to the creation of an information package ready for transfer to a long-term archive at National Archives of Sweden. CAST is developed in compliance with the ISO standards Open Archival Information System (OAIS) and Producer-Archive Interface Methodology Abstract Standard (PAIMAS), and do also consider other well-known and established standards and recommendations in digital preservation area. CAST promotes cooperation, knowledge acquisition and sharing among users in an experimental step-by-step workflow, encouraging a proactive approach resulting in authority websites better adapted to digital preservation recommendations. CAST is developed at LDP Centre, a national competence centre in Sweden, within the digital preservation area.

  • 25.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Workshop On User MObility and VEhicular Networks2014Other (Other (popular science, discussion, etc.))
  • 26.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Editorial Board Member, Journal of Internet Services and Information Security (JISIS)2012Other (Other (popular science, discussion, etc.))
  • 27.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Editorial Board Member, Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications (JoWUA)2012Other (Other (popular science, discussion, etc.))
  • 28.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Expert Reviewer2012Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Assigned as expert reviewer in the national quality assessment of higher education in the area of Computer Science/ICT/Media technology.

  • 29.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: IEEE Conference on Local Computer Networks2014Other (Other (popular science, discussion, etc.))
  • 30.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: International Conference on Mobile and Ubiquitous Multimedia2008Other (Other (popular science, discussion, etc.))
  • 31.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: International Conference on Mobile and Ubiquitous Multimedia2013Other (Other (popular science, discussion, etc.))
  • 32.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: International Conference on Mobile Data Management2011Other (Other (popular science, discussion, etc.))
  • 33.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Member of the board of the faculty of science and technology and its research strategy committe2007Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Board of the faculty of science and technology and its research strategy committe

  • 34.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Member of the election committee of postgraduate student's association2009Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Member of the election committee of postgraduate student's association

  • 35.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Opponent/External Reviewer2012Other (Other (popular science, discussion, etc.))
    Abstract [sv]

    Opponent/External Reviewer for Licentiate thesis. Tahir Nawaz Minhas: "Network Impact on Quality of Experience of Mobile Video". Blekinge Institute of Technology, Karlskrona, Sweden on March 28, 2012

  • 36.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Vice chairman and member of the board of the postgraduate student's association2007Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Vice chairman and member of the board of the postgraduate student's association

  • 37.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Aktivitet: Workshop On User MObility and VEhicular Networks2013Other (Other (popular science, discussion, etc.))
  • 38.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Always best served and managed: research challenges in future mobile multimedia application architectures2007Report (Other academic)
    Abstract [en]

    Demands from users of future generation networks will include seamless access to services across multiple wireless access networks. Handsets and laptops will typically be equipped with several network interfaces and have enough computing power and battery capacity to connect to several access networks simultaneously within and over administrative domains in a multi-homed manner.Existing technologies and solutions solve parts of the problems raised in such a scenario. However, a remaining important research challenge that still needs to be solved is to find an optimal mobility management solution offering terminal mobility as well as session, service, and personal mobility. Furthermore, a uniform and scalable mechanism for quality of service provisioning needs to be defined and integrated in an overall architecture offering differentiated handling of real-time and non real-time flows. The architecture will be based on the Internet Protocol as its least common denominator, but there are still a lot of research questions to be answered.This article surveys existing solutions and outlines future work in the area of cross-layer designed mobility management solutions and integrated quality of service support using a cross-layer design and policy-based approach.

  • 39.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Finding NIMO2012In: International Innovation, ISSN 2041-4552, Vol. 3, 52-54 p.Article in journal (Other (popular science, discussion, etc.))
  • 40.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Interworking techniques and architectures for heterogeneous wireless networks2012In: Journal of Internet Services and Information Security (JISIS), ISSN 2182-2069, E-ISSN 2182-2077, Vol. 2, no 1/2, 22-48 p.Article in journal (Refereed)
    Abstract [en]

    Fourth generation (4G) wireless systems targeting 100 Mb/s for highly mobile scenarios and 1 Gb/s for low mobility communication are soon to be deployed on a broad basis with LTE-Advanced and IEEE 802.16m as the two candidate systems. Traditional applications spanning everything from voice, video, and data to new machine-to-machine (M2M) applications with billions of connected devices transmitting sensor data will in a soon future use these networks. Still, interworking solutions integrating those new 4G networks with existing legacy wireless networks are important building blocks in order to achieve cost-efficient solutions, offer smooth migration paths from legacy systems, and to provide means for load balancing among different radio access technologies.This article categorizes and analyzes different interworking solutions for heterogeneous wireless networks and provides suggestions for further research.

  • 41.
    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

  • 42.
    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.

  • 43.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Cherkaoui, Soumaya
    Electrical and Computer Engineering Department, Sherbrooke University, Sherbrooke University, Université de Sherbrooke.
    On-Move 20152015In: Proceedings of 40th Annual IEEE Conference on Local Computer Networks Conference Workshops (LCN Workshops 2015): LCN Workshops / [ed] Salil Kanhere; Jens Tölle; Soumaya Cherkaoui, Piscataway, NJ: IEEE Communications Society, 2015, 7365896Conference paper (Refereed)
  • 44.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Elkotob, Muslim
    Media-Broadcast GmbH.
    Rethinking IP mobility management2012In: Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications, ISSN 2093-5374, E-ISSN 2093-5382, Vol. 3, no 3, 41-49 p.Article in journal (Refereed)
    Abstract [en]

    IP Mobility Management allowing for handover and location management to be handled by the network layer has been around for a couple of 20 years or so now. A number of protocols have been proposed including the GPRS Tunneling Protocol (GTP), Mobile IP, Proxy Mobile IP, and the Locator/Identifier Split Protocol (LISP) being the best known and most discussed in the research literature. This paper overviews existing solutions and suggests a new distributed and dynamic mobility management scheme and evaluates it against existing static approaches.

  • 45.
    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, 117-120 p.Conference 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.

  • 46.
    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, 52-63 p.Conference 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.

  • 47.
    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.

  • 48.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Granlund, Daniel
    Åhlund, Christer
    M4: MultiMedia Mobility Manager: a seamless mobility management architecture supporting multimedia applications2007In: Proceedings of the 6th International Conference on Mobile and Ubiquitous Multimedia: December 12 - 14, 2007, Oulu, Finland / [ed] Timo Ojala, Red Hook, NY: Curran Associates, Inc., 2007, 6-13 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, a proof-of-concept and a software architecture, M4 (MultiMedia Mobility Manager), is presented. In short, M4 is offering seamless mobility management to multimedia appli­cations using a variety of wireless access networks. First, M4 is built on multihomed Mobile IP building on the principle of soft handovers. Second, network selection in M4 is based on a network layer metric combining round-trip times and jitter in round-trip times. Third, the end-user can enter its own preferences on network selection through a policy-based extension to the proposed network selection algorithm.The proposed architecture is evaluated in a live heterogeneous networking environment where handover performance is studied in detail. In addition, user-perceived quality of experience for Voice over IP using the M4 software architecture has been studied. Last, downloads of large amount of data using a combination of high and low capacity wireless networks in M4 were studied.Results indicate that the architecture as a whole and the proposed algorithms perform well. M4 can thus be seen as an imple­mentation of the "Always Best Connected" vision.

  • 49.
    Andersson, Karl
    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, Computer Science.
    Project: PERvasive Computing and COMmunications for sustainable development2015Other (Other (popular science, discussion, etc.))
  • 50.
    Andersson, Karl
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science. Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Distance- Spanning Technology.
    Hossain, Mohammad Shahadat
    University of Chittagong, Department of Computer Science and Engineering, University of Chittagong.
    Heterogeneous Wireless Sensor Networks for Flood Prediction Decision Support Systems2015In: 2015 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS): 6th IEEE INFOCOM International Workshop on Mobility Management in the Networks of the Future World, Piscataway, NJ: IEEE Communications Society, 2015, 133-137 p.Conference paper (Refereed)
    Abstract [en]

    Recent advancements in the fields of sensor equipment and wireless sensor networks have opened the window of opportunity for many innovative applications. In this paper, we propose a new architecture for building decision support systems using heterogeneous wireless sensor networks. The architecture is built around standard hardware and existing wireless sensor networks technology. We show the effectiveness of the proposed architecture by applying it to a flood prediction scenario.

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