MANTHOS KAZANTZIDIS CV

Research & Development in Computer Science, Wireless Networking, Multimedia, Bluetooth, 802.11 Ph.D.

kazantz (at) cs (dot) ucla (dot) edu [ My Home Page ]
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    SHORT BIO & INTERESTS

    Dr. Manthos (Matheos, Matthaios) I. Kazantzidis received his Diploma degree in Computer Engineering and Informatics in 1995 from the University of Patras, Greece. He received his Masters of Science in Computer Science in 1998 and his Ph.D. in 2002 from University of California, Los Angeles. He is now working as a Post-Doctorate Fellow on at the UCLA Wireless Adaptive Mobility Laboratory. His interest focuses on wireless network architectures for multimedia support, including the Internet, networks with wireless and mobile links and ad-hoc networks. He specializes in multimedia transport protocols, end-to-end measurements, link measurements and lower layer support for measurements, transport protocols, network QoS support, wireless MAC layers, personal area networks, middleware architectures, session transfer and handoff architectures and proxy and multimedia systems, as well as M-peg H.263 and Wavelet Video coding. His work has been part of TRAVLER [*], I-MASH [ * ] and currently the MinuteMan [ * ] project.

    THESIS

  • Now available for download in html

    My thesis is on adaptive multimedia over networks with wireless links including multi-hop, ad-hoc, no infrastructure wireless networks. Transport protocols and end-to-end adaptation mechanisms developed for wired networks do not work in wireless. This is because the measurements that a transport protocol requires for its functions are highly inaccurate and suffer reverse channel problems, due to the 3 M's: Medium (variance), Mobility and Multi-hop (noise). In such networks lower layer feedback architectures become very attractive. In my Ph.D. dissertation I am exploring the trade-off between having strong network and MAC support for multimedia applications versus following the simple and scalable end-to-end transport paradigm. In lower layer feedback architectures the wireless network node (refering to both hardware and software) bears the cost of 'knowing' its network and supporting its functions. However, measurements are accurate and can efficiently support adaptive multimedia, transports and call admission. At the other end of no network or lower support, scalability, extensibility and cost are improved, but flow control and applications depend on end-to-end measurements and observations. How should one decide between the two in networks with wireless links? I have focused my work on ad-hoc and last mile infrastructure 802.11 and Bluetooth configurations. In wireless, this trade-off is of particular interest for two reasons:
    - End-to-end measurements with wireless links do not perform well. The ones that have been developed for wired networks need significant improvement to take into account random losses and transient and variable network response.
    - In these networks the lower level feedback is not an unattractive option because their scalability behavior and constrains are different.
    I concluded that end-to-end adaptation improves the overall delivered perceptual QoS only when a small number of connections compared to the network capacity can be supported. With a high encoding complexity video stream, and high flow changing and mobile environment where a low layer non-adaptive transmission can support 50 video pairs with reasonable QoS (MPQM measured) end-to-end adaptation can support only up to 10, and deteriorates fast as connections are added. Our network feedback adaptation, based on 802.11 and Bluetooth specific source, destination available bandwidth measurements on the other hand, is a very appropriate solution, always offering almost equal or better QoS than a low rate non-adaptive transmission. In Bluetooth due to the Master centric control end-to-end is quite accurate and works almost as good as network feedback, however Bluetooth Scatternet mobility is still an area of work in progress for the Bluetooth community, and we expect similar results once appropriate mobility/handoff support for multimedia applications exist.
    This work requires a wide range of expertise. Particularly in 802.11 and Bluetooth MACs, QoS routing, Internet, wireless and ad-hoc network architectures, measurements and filtering, feedback control systems, TCP/IP, adaptive multimedia applications and transports, video and audio coding etc.

    EDUCATION

  • 5/2002: Post-doctorate - UCLA Computer Science Wireless Adaptive Mobility Lab

  • 4/2002: PhD - UCLA Computer Science PhD Program US-CA-Los Angeles
    Ph.D. Thesis Proposal: "Adaptive Wireless Multimedia" UCLA CS WAM Lab (advisor: Dr. Mario Gerla), currently Ph.D. Candidate, GPA: 3.931, GPA in major: 4.00 (3 A+'s)

  • 7/1998 - Master of Science - UCLA Computer Science US-CA-Los Angeles
    - Advanced courses in networking, computer architecture, M.B.A. core minor. Major in Advanced Computer Networks, Advanced Internet Research GPA: 3.931,GRE Scores December 1995: Verbal 510, 49% - Quantitative 790, 96% - Analytical 720, 91%, Computer Science 740, 82%

  • 11/1995 - Diploma (eq. to M.Sc.) - University of Patras - Computer Engineering and Informatics, Dept Greece Patras
    - Thesis: "The Significance of the Cache Block Size on Multithreaded Processors" with prof. D.Lioupis - 61 courses, incl. Advanced Topics in Networks, VLSI Design, Advanced Scientific Computation, Methods of Production Planning, CIM, Communications GPA: 8.79 out of 10

    WORK EXPERIENCE

  • 6/2002 - present Post-Doctorate Researcher - UCLA CS WAM Lab Los Angeles CA

  • 6/1998 - 5/2002 Computer Science Researcher - UCLA CS WAM Lab Los Angeles CA
    Adaptive Wireless Multimedia - Have tutored/lead 1 Master, 3 teams of a total of 9 undergraduates for special studies, several graduate class projects.Successful proposal writing (I-MASH $3M, Hewlett Packard Lab $350K, DiMi, Core)

  • 9/1996 - 3/2000 Teaching assistant - UCLA CS Dept Los Angeles CA
    C, C++, Computer Architecture, Operating Systems, Advanced Computer Networks (UCLACS 10C-31-32-51A-111, 218)

    Pre/Non-Doctorate Work:

  • Computer Network Office - UCLA History Dept Los Angeles
    Managed the departments LANs, network interconnections, operations and help desk.
    Implementation of Monitor and control a distributed alarm/security boxes network system.
  • Computer Engineer Advanced Informatics Ltd, Patras, Greece
    - Real-time operating systems development (RTOS on ST/9 and ARM micro-controllers), Monitoring tool (MAT) and performance evaluation tool (PAT) for real time operating systems. (www.advanced.gr)

    PUBLICATIONS

    Books

  • Ad Hoc, Wireless, Mobile Networks The Role of Performace Modeling and Evaluation -M. Gerla, M. Kazantzidis, G. Pei, F. Talucci, and K.Tang Book Chapter In Performance Evaluation: Origins and Directions, pp. 51-95, Edited by G. Haring, C. Lindemann, and M. Reiser, Springer-Verlag, 2000. Relevant writeup

    Journals & Magazines:

  • MAC intelligence for adaptive multimedia in 802.11 networks - M. Kazantzidis - JSAC on Intelligent Systems, Jan. 2005
  • Personal Area Networks: Bluetooth or IEEE 802.11? - P. Johansson, R. Kapoor, M. Kazantzidis and M. Gerla - International Journal of Wireless Information Networks SPECIAL ISSUE ON MOBILE AD HOC NETWORKS (MANETs) Standards,Research, Applications, April 2002
  • Bluetooth an Enabler of Personal Area Networking Per Johansson (Ericsson), YZ lee, Mario Gerla, Manthos Kazantzidis (UCLA) IEEE Network Special Issue on Personal Area Networks, Sept-Oct 2001

    Conferences (only as Primary Author)

  • Network Independent Available Bandwidth Sampling and Measurement - Manthos Kazantzidis,Dario Magiorini, Mario Gerla - Lecture Notes in Computer Science - Publisher: Springer-Verlag Heidelberg - ISSN: 0302-9743 Quality of Service in Multiservice IP Networks: Second International Workshop, QoS-IP 2003, Milano, Italy, February 24-26, 2003
  • The impact of link layer assisted multimedia adaptation in wireless networks - Manthos Kazantzidis,Mario Gerla - ITRE 2003
  • Kazantzidis M., Gerla M. (2002) On the Impact of Inter-Piconet Scheduling in Bluetooth Scatternets - Proceedings of WWIC 2002
  • End-to-end versus Explicit Feedback Measurement in 802.11 Networks Manthos Kazantzidis Mario Gerla - The Seventh IEEE Symposium on Computers and Communications
  • End-to-end Adaptive Multimedia over Bluetooth Scatternets - Manthos Kazantzidis, Andrea Zanella, Mario Gerla - Eurel AICA European Wireless 2002
  • Johansson P., Kapoor R., Kazantzidis M., Gerla M. (2002) Rendezvous Scheduling in Bluetooth Scatternets - Proceedings of IEEE ICC 2002
  • Ad hoc Networking with Bluetooth Mario Gerla, Rohit Kapoor, Manthos Kazantzidis (UCLA), Per Johansson (Ericsson) - WMI at Mobicom 2001
  • Permissible Throughput Network Feedback for Adaptive Multimedia in AODV MANETs - ICC 2001 .ps  1 2
  • On Fairness and Efficiency of Adaptive Audio Application Layers for Multihop Wireless Networks - Proceedings of IEEE MOMUC'99, San Diego, CA, Nov. 1999. ps  1 2 3 4
  • Experiments on QoS Adaptation for Improving End user Speech Perception over Multihop Wireless Networks - Proceedings of IEEE ICC, Vancouver, Jun. 1999. ps.gz 
  • Validation of Multi-Layer Simulation Experiments via Analysis and Measurements -Proceedings of DARPA/NIST Network Simulation Workshop, Fairfax, VA,May 1999. Relevant writeup  1
  • An Ultimate Encoding Layer for Layered Real-Time Speech Streams over Multi-hop Wireless Networks - Proceedings of IEEE 2nd Annual UCSD Conference on Wireless Communications, San Diego, CA, Mar. 1999. .ps.gz

    Technical Reports

    The work placed here has been submitted for publication to IEEE and ACM supported conferences but has not been accepted yet. I publish it here in order to use it f or referencing, answer questions and for resume completeness.
  • 9/20/01: How to measure available bandwidth on the Internet (exploring possibility for filing patent)
  • 9/20/01: Locally optimal Bluetooth Scatternet formation (exploring possibility for filing patent)
  • 9/20/01: End-to-end vs explicit feedback measurement in 802.11 networks
  • 2/14/91: Wireless Adaptive Multimedia using Network level measurements

    Selected Demos and Presentations

  • Adaptive Video over Bluetooth Scatternets - UCLA CS Research Review 2001
  • Adaptive Video over Multi-Hop Wireless Networks using Hybrid Simulation - Digivations 2000, Sept. 2000, Digital Media Innovation Program
  • Increasing Speech Perception in face of external interference using Speech Recognition and Synthesis - Secretary of the Army Louis Caldera UCLA 1999 visit.

    AWARDS & HONORS

  • Recipient of the Fred W. Ellersick Prize in 2002 (formerly the Communications Society Magazine Prize Paper Award; renamed in 1992) [ 1 ]
  • Graduated 4th in graduating class (graduating 49, class 119), Nov.1995, University of Patras
  • Financial Support by several tuition waivers and stipents, UCLA CS Dept., Sept. 96 - present
  • Gerondelis Foundation Fellowship, July 1998

    SKILLS

  • Bluetooth Networking Expert Currently used 2 years
  • Bluetooth Scatternets Expert Currently used 2 years
  • 802.11 Ad-hoc and Multi-hop Wireless Networking Expert Currently used 5 years
  • Multimedia Transport and Application Protocols Expert Currently used 5 years
  • IEEE/ACM Reviewer Expert Currently used 4 years
  • NSF, CORE, DiMI, HP Successful Proposal Writing Expert Currently used 4 years
  • Advanced E-Commerce Implementation & Technologies Expert Currently used 6 years
  • Large Scale Database Design & Implementation Expert Currently used 7 years<
  • UNIXes and Windows Scripting,Programming, Security Expert Currently used 11 years
  • Internet Scale Search Engine Technology Expert 1 year ago 2 years
  • ISDN Computer Telephony Applications Programming Expert 1 year ago 1 years
  • Visual C++ and Multimedia Application Programming Expert Currently used 6 years
  • Parsec, GlomoSim Network Simulation Expert Currently used 4 years
  • Hybrid Simulation for Wireless Networks, Multimedia Expert Currently used 4 years
  • NS Network Simulation Expert Currently used 2 years
  • RTOS for Embedded Controllers , ARM, ST-9 Intermediate +4 yrs ago 1 years

    SELECTED RESEARCH PROJECTS AND TEAMS

  • AB-probe: Available bandwidth probing for the Internet
  • 802.11 PCF NS model (Nov 2002, UCLA)
  • Streaming Session Transfer in the i-Mash architecture (Oct 2002, UCLA, I-MASH team)
  • End-to-End Optimal Bluetooth Scatternets (May 2001, UCLA, I-MASH team)
  • Adaptive Multimedia on Bluetooth and Personal Area Networks (May 2001, UCLA, I-MASH team)
  • Permissible Throughput wireless network measurement and feedback (2000, UCLA, I-MASH team)
  • Hybrid Simulation for Perceptual Evaluation of Video Streams (2000, UCLA, TRAVLER team)
  • Adaptive MPEG, H.263 IP Video Client/Server (2000, UCLA, TRAVLER team)
  • TCP over wireless experiments on real multihop testbed (1998, UCLA, TRAVLER team)
  • Adaptive Audio Client/Server, Text-to-Speech and Speech Engine features (1998, UCLA, TRAVLER team)
  • Host-network interface architecture study and Myrinet performance (1997, UCLA)
  • Random Early Drop gateways gradual deployment on the Internet. (1996, UCLA, L. Zhang)
  • VLSI full Design of Wallace overlapped multiple-bit scanning multiplier (1995, U. Patras)
  • Designed information system for importing company with franchises (1994 U. Patras)
  • Implemented full database system for local folklore museum (1994, U. Patras)
  • Designed multiple printer spooler card for PC bus (1994, U. Patras)

    References available upon request


     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     
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