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My Research Themes

My Research Themes. Dr. Tarik TALEB, Ph. D Assistant Professor Graduate School of Information Sciences Tohoku University, Sendai, Japan. Research Projects. Next Generation Wireless Communications Systems Transmission protocols Mobility management and QoS Routing Protocols

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My Research Themes

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  1. My Research Themes Dr. Tarik TALEB, Ph. D Assistant Professor Graduate School of Information Sciences Tohoku University, Sendai, Japan

  2. Research Projects • Next Generation Wireless Communications Systems • Transmission protocols • Mobility management and QoS Routing Protocols • On-Demand Multimedia Transmission • Internet Security • Internet Worms • Trace back of DoS Attacks • Intrusion Detection Systems

  3. Transmission Protocols for Wireless Commun. • REFWA Recursive, Explicit, and Fair Window Adjustment • A newtransport protocol to efficiently and fairlyadjust the sending rates of TCP connections inbroadband satellite communication systems • DSBP Dummy Segment-based Bandwidth Probing • A novel technique to improve theefficiency of TCP in heterogeneous wireless networks

  4. Satellite Network Direct Users Terrestrial/Wireless Networks REFWA: Recursive, Explicit, and Fair Window Adjustment • Aim: • To find optimum sending rates for TCP connections in NGEO broadband satellite systems • To solve issues related to handoff and unfairness due to RTT variance • Concept: • Use of hops count to estimate connections RTT • Use of RTT to compute the optimum sending rates of each TCP sender • Further applications: • Multi-homing over hybrid wired/wireless networks • T. Taleb, N. Kato, and Y. Nemoto, "REFWA: An Efficient and Fair Congestion Control Scheme for LEO Satellite Networks", in IEEE/ACM Transactions on Networking Journal, Oct. 2006. • T. Taleb, N. Kato, and Y. Nemoto, "An Explicit and Fair Window Adjustment Method to Enhance TCP Efficiency and Fairness over Multi-Hops Satellite Networks", IEEE J. Select. Areas in Commun., Feb. 2004.

  5. Correspondent Node Home Agent Data Traffic (TCP) Dummy Segments BS2 BS1 Mobile Node DSBP: Dummy Segment-based Bandwidth Probing • Aim: • To solve issues related to the bandwidth disparity in heterogeneous wireless networks • Concept: • Use of low-priority dummy segments to probe bandwidth of the new network • Further applications: • RTP/RTCP-based multimedia streaming • T. Taleb, K. Kashibuchi, N. Kato, and Y. Nemoto, “A Dummy Segment Based Bandwidth Probing Technique to Enhance the Performance of TCP over Heterogeneous Networks”, IEEE WCNC 2005. • K. Kashibuchi, T. Taleb, A. Jamalipour, N. Kato, and Y. Nemoto, “A New Smooth Handoff Scheme for Mobile Multimedia Streaming using RTP Dummy Packets and RTCP Explicit Handoff Notification”, IEEE WCNC 2006.

  6. Mobility Management and Routing QoS Protocols • ELB (ExplicitLoad Balancing) • A newrouting protocol to better distribute traffic and to accordingly alleviate congestion in Non-Geostationary satellite systems • VHRP (Vehicle-Heading based Routing Protocol) • A stable and reliable routing mechanism for Inter-Vehicular Communications to reduce the number of link breakage events and increase the end-to-end throughput in VANET networks • DEMAPS (Dynamic & Efficient MAP Selection) • A dynamic MAP management strategy for the selection of the most appropriate MAP with the lightest traffic load based on an estimation of MAP load transition.

  7. Congested Sender Receiver ELB: Explicit Load Balancing • Aim: • To deal with scenarios where some satellites get congested while others remain underutilized • To better distribute traffic over the entire constellation, reduce congestion due packet drops, and to improve network utilization • Concept: • Explicit & periodic exchange of information on queue status among neighboring satellites • Applications: • Delay insensitive applications • Possible application to terrestrial networks • T. Taleb, A. Jamalipour, N. Kato, and Y. Nemoto, "IP Traffic Load Distribution in NGEO Broadband Satellite Networks", in Proc. of 20th Int. Symposium on Computer & Information Sciences, Oct. 2005. (Invited Paper)

  8. VHRP: Vehicle-Heading based Routing Protocol • Aim: • To guarantee stable and reliable routes for communication • To reduce the number of link breakage events • To increase E2E throughput and to guarantee routing QoS in VANET networks • Concept: • To group vehicles based on their velocity headings and to establish routes among vehicles from same groups • Applications: • Inter-Vehicular Communications • Hotspots-to-Vehicles communications • T. Taleb, M. Ochi, A. Jamalipour, N. Kato, and Y. Nemoto, " An Efficient Vehicle-Heading Based Routing Protocol for VANET Networks", in Proc. of IEEE WCNC 2006

  9. Correspondent Node Home Agent Internet MAP1 MAP2 MAP3 MAP4 AR1 AR2 AR3 AR4 MN DEMAPS: Dynamic & Efficient MAP Selection • Aim: • To solve issues related to handoff management in Mobile IPv6 networks • To better distribute traffic among MAPs • To alleviate congestion, to enhance network resources utilization, and to ultimately guarantee QoS • Concept: • Use of Exponential Moving Average to predict transitions of MAPS load • Applications: • Mobile IPv6 networks • T. Taleb, T. Suzuki, N. Kato, and Y. Nemoto, "A Dynamic and Efficient MAP Selection for Mobile IPv6 Networks ", in Proc. of IEEE Globecomm 2005.

  10. On-Demand Multimedia Transmission • NBB VoD (Neighbors Buffering Based VoD) • An interactive and scalable scheme for the provision of VoD service in multicast environments • Theatre in the Sky • An architecture based on Quasi-GEO Stationary Satellites for global streaming of on-demand multimedia services to hybrid networks made of both mobile and fixed users

  11. Already transmitted portion To be transmitted Server Request Old User New User NBB-VoD: Neighbors Buffering Based VoD • Aim: • To increase the capacity of VoD servers and the scalability of the system • To efficiently utilize the network resources (e.g. bandwidth) • Concept: • Serve new users willing to join a session from their neighbors, already members of the session • Applications: • On-demand multimedia services in multicast environments, distance learning… • T. Taleb, N. Kato, and Y. Nemoto, "On-Demand Media Streaming to Hybrid Wired/Wireless Networks over Quasi-Geo Stationary Satellite Systems", Elsevier Journal on Computer Networks, Feb. 2005. • T. Taleb, T. Suzuki, N. Kato, and Y. Nemoto, "Neighbors-Buffering Based Video-on-Demand Architecture", Signal Processing: Image Communication, Aug. 2003.

  12. Multicast (data) Control Message Unicast (data) Current Channel Upcoming Channel Request Time Theatre in the Sky(1) Metropolitan Server Storage Data (Popular Video) Core Network Local Service Manager Replicated Data

  13. The Quasi-Geostationary Satellites Constellation Inter-System Links A Quasi-GSO system Metropolitan Service Areas Theatre in the Sky (2) • T. Taleb, A. Jamalipour, N. Kato, and Y. Nemoto, "A Theatre in the Sky: A Ubiquitous Broadband Multimedia-on-Demand Service over a Novel Constellation Composed of Quasi-Geostationary Satellites", to appear in Wiley Int. J. of Satellite Commun. and Networking.

  14. Internet Security • DoS Attacks in Mobile Networks • Design of a prevention system to secure mobile networks from high Rate TCP-based DoS attacks originated from malicious mobile users • Intrusion Detection System • Development of a hybrid system for the detection, prevention, and trace back of cryptographic protocol intrusions • Internet Worms • An Efficient Signature-Based Framework for Early Detection of Internet Worms over Large Scale Networks

  15. Server (Victim) Tracing fails Internet AR Attack BS Attack Change point of attachment Attacker Attacker Securing Hybrid Wired/Mobile IP Networks • Aim: • To demonstrate the inefficiency of trace back techniques in mobile networks • To design a prevention system to secure hybrid wired/mobile networks from high Rate TCP-based DoS attacks coming from malicious mobile users • Concept: • Send suspicious TCP senders a test feedback requesting them to decrease their sending rates • Judge senders’ legitimacy based on their responsiveness • Applications: • Security in mobile networks, WIMAX, WLAN…. T. Taleb, H. Nishiyama, N. Kato, and Y. Nemoto, "Securing Hybrid Wired/Mobile IP Networks from TCP-Flooding Based Denial-of-Service Attacks", in Proc. of IEEE Globecomm2005.

  16. Early Detection of Internet Worms • Aim • To detect Internet worms and generate their signatures at the early stage of their propagations • Concept • Information-sharing among hierarchically placed security managers • Local managers: Collect worm-like or suspicious flows • Metropolitan managers: Sort worms and generate worm signature • Global manager: relays worm signature • Applications • worm detection in large scale networks (e.g. universities, large enterprises, ...) K. Simkhada, T. Taleb, Y. Waizumi, A. Jamalipour, N. Kato, and Y. Nemoto, "An Efficient Signature-Based Approach for Automatic Detection of Internet Worms over Large-Scale Networks," In Proc. of IEEE ICC, Istanbul, Turkey, Jun. 2006.

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