my research themes dr. tarik taleb, ph. d assistant professor graduate school of information...
TRANSCRIPT
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
REFWARecursive, Explicit, and Fair Window Adjustment A new transport protocol to efficiently and fairly adjus
t the sending rates of TCP connections in broadband satellite communication systems
DSBPDummy Segment-based Bandwidth Probing A novel technique to improve the efficiency of TCP in
heterogeneous wireless networks
Transmission Protocols for Wireless Commun.
4
REFWA: Recursive, Explicit, and Fair Window Adjustment
• 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.
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
A N o n-G eo s tatio nary S atellite N etw o rk in the S ky
D irec t U s ers
T erres trial W ired N etw o rk B
DESKPRO SB
D e s k P ro
In ternet S ervic e P ro vid er
G atew ay
S erver
Inte rne t
D e s k P ro
G atew ayD e s k P ro
G atew ayD e s k P ro
G atew ay
T erres trial W ired N etw o rk A
T erres trial W ireles s N etw o rks
DESKPRO SB
D e s k P ro
In te rne t S e rvic e P rovide r
G a te w a y
S e rve r
In te rn e t
Satellite Network
Terrestrial/Wireless Networks
DirectUsers
5
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
DSBP: Dummy Segment-based Bandwidth Probing
BS1 BS2
CorrespondentNode
HomeAgent
MobileNode
Dummy SegmentsData Traffic(TCP)
• 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
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.
Mobility Management and Routing QoS Protocols
7
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
ELB: Explicit Load Balancing
•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)
Sender Receiver
Congested
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
N
F
C
D
B
A
D e stin a t io nSo u rc e
9
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
DEMAPS: Dynamic & Efficient MAP Selection
•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.
AR3
Internet
MAP2MAP1
MAP4MAP3
AR1 AR2
AR4
MN
CorrespondentNode
HomeAgent
10
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
On-Demand Multimedia Transmission
11
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.
Request
New UserOld User
Already transmitted portion
To be transmitted
Server
12
Theatre in the Sky (1)
Metropolitan Server
Storage Data
(Popular Video)
Core Network
Local Service ManagerReplicated Data
Multicast (data)
Control Message
Current Channel
Upcoming Channel
Request Time
Unicast (data)
13
Theatre in the Sky (2)
The Quasi-Geostationary Satellites Constellation
Inter-System LinksA Quasi-GSO system
Metropolitan Service Areas
• 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
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
Internet Security
15
Securing Hybrid Wired/Mobile IP Networks
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.
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….
Server(Victim)
InternetInternet
BS
AR
Attacker
Tracingfails
Attack
Attacker
Attack
Change point of
attachment
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.
L o c a lS e c urity M a na g e r
L o c a l N e tw o rk 1
M e tro po lita n A re a N e tw o rk A
M e tro po lita n A re aN e tw o rk B
M e tro po lita n A re aN e tw o rk C
L o c a l N e tw o rk 2L o c a l N e tw o rk 3
G lo ba lS e c urity M a na g e r
M e tro po lita nS e c urity M a na g e r