My Research Themes

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

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Transmission Protocols for Wireless Commun.

• REFWA
• Recursive, Explicit, and Fair Window Adjustment
• A new transport protocol to efficiently and
  fairly adjust the sending rates of TCP
  connections in broadband satellite communication
  systems
• DSBP
• Dummy Segment-based Bandwidth Probing
• A novel technique to improve the efficiency of
  TCP in heterogeneous wireless networks

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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.

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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.

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Mobility Management and Routing QoS Protocols

• ELB (Explicit Load Balancing)
• A new routing 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.

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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)

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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

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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.

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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

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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.

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Theatre in the Sky (1)
Metropolitan Server
Storage Data (Popular Video)
Core Network
Local Service Manager
Replicated Data
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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.

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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

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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 Globecomm 2005.
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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.