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Networking Research Group

Networking Research Group. Current Research on Next Generation Networks (NGNs). Group Leaders:. Prof. Krys Pawlikowski 1 , Prof. Harsha Sirisena 2 , Dr Allan McInnes 2 1 Department of Computer Science and Software Engineering 2 Department of Electrical and Computer Engineering.

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Networking Research Group

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  1. Networking Research Group Current Research on Next Generation Networks (NGNs) Group Leaders: Prof. Krys Pawlikowski1, Prof. Harsha Sirisena2, Dr Allan McInnes2 1 Department of Computer Science and Software Engineering 2 Department of Electrical and Computer Engineering Group Members: PhD: Sayan K. Ray, Huan Zhang, William Liu ME/MSc: Yuxuan Tim Hong, Adam Chang, Geoffrey Clark

  2. Broad Themes Mobility

  3. Broad Themes Dependability

  4. Broad Themes Scalability

  5. Mobility

  6. Mobility Management in WMAN Research Topic: Mobility and Handover Performance Management in Wireless Metropolitan Area Networks (WMAN) Identified Research Problem: Both the pre-handover and actual handover phases of Mobile WiMAX suffer from drawbacks related to latency, resource usage, excessive scanning and ranging, and unnecessary handover management messages

  7. Approach and Tools • Mobile Station Controlled Fast Handover Algorithms • Selection of next NBS based on self-tracking of movement trajectory • Reduces scanning and ranging activities as well as overall packets loss • Base Station Controlled Fast Handover Algorithms • Smart selection of NBS for handover • Reduces scanning and ranging activities • Network-Assisted Fast Handover Algorithm • Reuse of previous handover information with help of backbone network • Reduces inter-handover connection gap and IP-connectivity delay • Research Tools : Qualnet Network Simulator & PlanetLab

  8. Enhanced MIPv6 Handover Research Topic: Enhancing the handover process in Mobile IPv6 networks Identified Research Problem: • Handover duration in Mobile IPv6 is too long for time-sensitive applications. Even with existing proposals, handover latency is still observable by users.

  9. Approach and Tools • Identification of problems with MIPV6 handover • Break down the handover process to find shortcomings • Survey the existing proposed solutions • Proposed modifications to MIPV6 • Eliminate the duplicate-address-detection process during handover by using a unique global IPv6 address • Modify edge router tables to map from global IPV6 to MAC addresses • Research Tools: Omnet++4.0, INET Framework and PlanetLab

  10. Dependability

  11. Network Resiliency in NGNs Research Topic: Network Resiliency and Service Availability Modelling in NGNs Identified Research Problem: • Network resiliency (or survivability) design in a multi-service NGNs environment includes two components: survivable routing scheme and spare capacity allocation strategy • It is a combinatorial optimization problem and NP-Hard

  12. Approach and Tools • Quantifying network robustness • Use Fiedler value instead of average node degree to characterize network connectivity • Working and spare capacity allocation strategies • ILP solution: Shared Backup Path Protection as benchmark • Scalable heuristic Ant Colony Optimization • Capacity-aware distributed routing algorithm • Smart routing based on the bandwidth usage information • Distributed routing using ant agent • Simulation Tools : OMNeT++ and AMPL/CPLEX • Testbed: NGN Measurement on PlanetLab

  13. Process Algebraic Analysis of WSNs Research Topic: Process algebraic modelling and analysis of wireless sensor networks Identified Research Problem: • WSNs are becoming ubiquitous, and moving into mission critical application domains, but there is a lack of theoretical tools for analyzing and understanding their behaviour

  14. Approach and Tools • Detailed models of node-level application code • Mapping from nesC language constructs to the process algebra CSP • Models of TinyOS scheduling and preemption • Abstracted models of network-level interactions • State-space reduction through predicate abstraction and bounded values • Abstract models of MAC-layer contention resolution • Verifiable correspondence between models • Refinement relations establish validity of abstractions • Analysis Tools : CSP and the FDR2 refinement checker

  15. Dynamic WSN Optimisation Research Topic: Dynamic optimisation of a heterogeneous WSN Identified Research Problem: Industrial wireless sensor networks require energy efficient routing and reliable, robust data transmission in a dynamically changing environment 15

  16. Approach and Tools • Routing algorithms for robust, energy-efficient operation • Manage traffic to maximize sensor node battery life and balance load on mains-powered routers • Network topology must adapt to environmental changes • Simulation tool for deployment planning • Extend existing simulation tools to aid evaluation of proposed deployments • Validation of simulation results against real-world testbeds • Work with industrial partner to check the accuracy of simulations • Simulation Tools :OMNeT++ with 802.15.4 framework 16

  17. Scalability

  18. Parallelization of IDS/IPS • Research Topic: • Parallelization of packet-inspection-based Intrusion Detection/Prevention System Identified Research Problem: • Network speeds are increasing, so IPS software must also execute more quickly. But modern processor design is focused on increasing speed through multi-core processing, while existing IPS programs are designed for single-core execution. 18

  19. Approach and Tools • Pipelined execution of IPS stages • Stream-level parallelization by packet classification • Parallelization of packet classification 19

  20. Search algorithms in P2P networks Research Topic: Evaluation of search algorithms in structured and unstructured P2P networks Identified Research Problem: • P2P network architecture, protocol design, network scaling, and churn effects impact the efficiency of file lookups, but these effects have not been well-characterized and the trade-offs between different architectures are not clear An example of a GIA P2P network

  21. Approach and Tools • Examine performance of different P2P architectures • Chord (Ring) • Kademlia (Tree) • GIA (Unstructured) • Study variation in key protocol performance parameters • Bandwidth consumption • Hop count • Latency • Simulation Tools : OMNeT++ with INET and OverSim • Testbed: NGN Measurement on PlanetLab

  22. Publications in 2009 • Sayan Kumar Ray, Krzysztof Pawlikowski and Harsha Sirisena, "Handover in Mobile WiMAX Networks: The State of Art and Research Issues", To Appear in IEEE Communications Surveys and Tutorials Journal, 3rd Quarter, 2010. • Sayan Kumar Ray, Krzysztof Pawlikowski and Harsha Sirisena, "A Fast Predictive Handover Mechanism for IEEE 802.16e Systems", in Proc. of New Zealand Computer Science Research Student Conference (NZCSRSC '09), 6-9 April, 2009, Auckland, New Zealand. • A. I. McInnes, "Using CSP to Model and Analyze TinyOS Applications", Proceedings of the 16th Annual IEEE International Conference and Workshop on the Engineering of Computer Based Systems (ECBS'09), Apr. 13-16, 2009. • A. I. McInnes, "Model-checking the Flooding Time Synchronization Protocol", Proceedings of the 7th IEEE International Conference on Control and Automation (ICCA'09), Dec. 9-11, 2009. • William Liu, Harsha Sirisena and Krzysztof Pawlikowski, FoF-R Ant-based Survivable Routing Using Distributed Resilience Matrix, 21st International Teletraffic Congress (ITC 21), Traffic and Performance Issues in Networks of the Future, September 15-17, 2009, Paris • William Liu, Harsha Sirisena and Krzysztof Pawlikowski, Efficacy of Fiedler Value versus Nodal Degree in Spare Capacity Allocation, 15th Asia-Pacific Conference on Communications (APCC2009), October 5-10, 2009, Shanghai

  23. Publications in 2009 • William Liu, Harsha Sirisena and Krzysztof Pawlikowski, A Novel Resilience Matrix for Survivable Routing in a Distributed Control Architecture, 15th Asia-Pacific Conference on Communications (APCC2009), October 5-10, 2009, Shanghai • William Liu, Harsha Sirisena and Krzysztof Pawlikowski, Weighted Algebraic Connectivity Metric for Non-Uniform Traffic in Reliable Network Design, International Workshop on Reliable Networks Design and Modeling (RNDM2009) collocated with International Conference on Ultra Modern Telecommunications (ICUMT2009), October 12-14, 2009, St. Petersburg • William Liu, Harsha Sirisena, Krzysztof Pawlikowski and Allan McInnes, Utility of Algebraic Connectivity Metric in Topology Design of Survivable Networks, 7th International Workshop on the Design of Reliable Communication Networks (DRCN 2009), Washington DC, October 25-28, 2009. • William Liu, Harsha Sirisena and Krzysztof Pawlikowski, A Novel Distributed Resilience Matrix for Arbitrary Failures in Spare Capacity, 7th International Conference on Information, Communications and Signal Processing (ICICS 2009), December 7-10, 2009, Macau

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