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Foundation for Research and TechnologyHellas FORTH Institute of Computer Science ICS

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Title: Foundation for Research and TechnologyHellas FORTH Institute of Computer Science ICS


1
Foundation for Research and TechnologyHellas
(FORTH)Institute of Computer Science (ICS)
Telecommunications and Networks Laboratory (TNL)
Dr. Vasilios A. SirisBroadband and Wireless
Networking Activity Leader vsiris_at_ics.forth.gr htt
p//www.ics.forth.gr/netlab
2
Institute of Computer Science (ICS), FORTH
  • One of FORTHs 7 institutes
  • Established 1983
  • Personnel 247 (2005)
  • Researchers/Univ. Faculty 33
  • Technical 106
  • Administrative/Support 19
  • Grads/Undergrads 57/32
  • Laboratories
  • Center for Medical Informatics Health
    Telematics
  • Computer Vision and Robotics
  • Human Computer Interaction
  • Information Systems
  • Computer Architecture VLSI
  • Telecommunications Networks

FORTH-ICS
3
Telecommunications Networks Lab Activities
  • Telecommunications Mobile Communications
  • Trust, cooperation, power efficiency in ad hoc
    networks
  • Wireless network security with focus on GSM/UMTS,
    802.11
  • Broadband and Wireless Networking
  • Resource management traffic engineering in
    wired/wireless networks
  • Channel and power control in dense WLANs
    multi-hop mesh networks
  • Attack detection and mitigation in broadband
    networks
  • Digital Signal Processing
  • Statistical algorithms for multimedia delivery
    over wireless networks
  • Voice processing, synthesis, and compression
  • Collaborative signal processing for sensor
    networks
  • Mobile Computing
  • Mobile positioning, and location-based services
  • Mobile network traffic measurement and analysis
  • Mobile peer-to-peer computing

4
TNL RTD Goals
  • Explore novel network architectures
  • Ad-hoc and mesh wireless networks
  • Sensor networks
  • Mobile peer-to-peer
  • Focus on cross-layer design of network protocols
  • Develop advanced network- and service-level
    software prototypes
  • Participate in research excellence training
    networks, at National, European, and
    International level
  • Serve as a proof-of-concept laboratory for
    telecommunication systems and software
  • Promote innovation through RTD transfer and
    consulting services to industry and government

5
TNL at a glance
  • Researchers 5
  • Research associates 1
  • Technical personnel 2
  • Research assistants 17
  • (6 Ph.D and 11 M.Sc. students)
  • Journal publications 20
  • Book publications 3
  • Conference publications 38
  • Citations 441 (101 self
    sited)
  • Project funds1.630K (05-08 966K )
  • Funds from services 500K (05-08 150K )

Growth of personnel
During 2000 -2004
6
Traffic Management in Next Generation
Wireless/Wired Networks
  • Efficient traffic management, seamless congestion
    control, and end-to-end Quality of Service (QoS)
    support
  • Importance
  • Increased access to Internet through wireless
    networks
  • Different users/applications demand different
    quality
  • Objectives / Expected results
  • Develop novel models based on cross-layer design
    for heterogeneous technologies (wired/wireless)
  • Investigate procedures to control interference,
    extend coverage, increase spatial reuse, reduce
    battery consumption
  • Investigate new architectures multi-hop,
    multi-channel, ad-hoc, sensor networks
  • Investigate QoS support in conjunction with
    security
  • Evaluate using analysis, simulation prototype
    implementation

7
Design, Management, and Security in Wireless
Networks supporting Quality of Service
  • Integrate technical knowledge and research
    results to provide state-of-the-art
    consulting/research services and measurement
    studies
  • Importance
  • Wireless networks is a key technology for
    providing cost-effective broadband access in
    rural and densely populated areas
  • Current design focuses on best-effort services,
    increased use of Voice-over-IP and streaming
    video
  • Security up to now isolated from QoS support
  • Objectives / Expected results
  • Develop new techniques for design and management
    of secure wireless networks
  • Experiment with new technologies in advanced
    local and metropolitan area test-beds
  • Provide high-quality consulting, spectrum
    measurement services

8
Research approach goals
Performance resource sharing objectives
9
TNL Infrastructure
  • MAC/Network experimentation
  • Linux/MadWiFi 802.11 MAC parameter control
    test-bed
  • Wireless measurement equipment
  • AirMagnet Laptop Analyzer 2.4/5 GHz and site
    surveyor
  • Spectrum analyzers RohdeSchwarz FSH-6
    (100KHz-6GHz), Spectran 6060 (1MHz-6GHz), low
    freq. detectors (3Hz-3GHz)

10
IEEE 802.11e WLAN test-bed
  • Cisco 1200 Series Access Point
  • IOS Version 12.3(4)JA with WMM
  • SNMP IEEE 802.11 QoS MIB
  • D-Link DWL-G650 Wireless Cards
  • Atheros 5211 chipset, MadWiFi
  • Used by Linux stations
  • D-Link DWL-AG660 Wireless Cards
  • Atheros 5212 chipset
  • Used by Window XP station

SNMP
STA 1

STA 11
STA 2
STA 10
11
TNL Infrastructure (cont.)
  • Science and Technology Park Crete (STEP-C)
    Hotspot serves 1000 users, based on 802.11g/a
  • Heraklion Wireless MAN Currently based on
    802.11b, gt100 Km2 coverage, serving 30 stationary
    sites. Evolving into multi-hop, multi-channel
    multi-radio MESH test-bed

12
Heraklion MESH Advanced Metropolitan Multi-hop
Multi-channel Test-bed
  • Under deployment
  • Unique in Greece
  • 12 nodes (mini PC/Linux) with 2-4 radio
    interfaces (802.11a/g, future WiMAX)
  • MadWiFi drivers, OLSR routing
  • Test-bed for
  • 802.11e QoS
  • power control / channel selection
  • load-based routing

4.5Km, 11a, 54Mbps
5Km, 11g, 34Mbps
FORTH
13
Recent research activities
  • Resource control for 802.11 WLANs
  • efficient utilization throughput
    differentiation
  • multi-rate operation, 802.11e EDCA HCCA modes
  • coexistence of real-time and elastic traffic
  • unsaturated traffic conditions
  • Access point selection
  • delay-based selection for achieving throughput
    fairness
  • SINR and power control in ad hoc networks
  • tradeoff between SINR threshold and connectivity
  • Power and channel control for dense WLANs
  • cell-breathing for load-balancing
  • consider MAC/network layer performance in target
    objective

14
State of the Art in Wireless Measurements
  • Over-provisioning in wired networks is
    acceptable but in wireless networks can be
    problematic
  • Challenges to set a testbed
  • Complexity in correlating measurements from
    various tools
  • Complexity of the radio propagation in
    real-environments
  • Academics are reluctant to expend the time and
    energy to sanitize the data sets
  • Companies are reluctant to disclose their data
  • Lack of benchmarks

Mobility Activity lead by Prof. Maria
Papadopouli (maria_at_csd.uoc.gr)
15
Research Activities (1/2)
  • Uncover deficiencies identify possible
    optimizations
  • Using measurements in large-scale production
    networks
  • Propose realistic models benchmarks for network
    topology, traffic demand, mobility
  • Design and evaluate protocols for improving the
    QoS
  • Emphasis on capacity planning, admission control,
    buffer management
  • Employ realistic benchmarks models in their
    evaluation

16
FORTH Repository
  • Online repository of
  • Wireless measurement data
  • Packet headers, snmp, syslog, signal quality
  • Models (such as for flow user arrivals)
  • Monitoring tools
  • Corresponds to more than 700 APs 20,000 users
  • http//www.cs.unc.edu/Research/mobile/datatraces.h
    tm
  • ? Login/ password access after free registration

17
Research Activities (2/2)
  • Develop principles that enable devices to
  • Efficient monitoring of networks
  • Selection of the appropriate channel, network
    interface
  • Mobile peer-to-peer computing (mp2p)
  • Develop various mp2p systems (such as 7DS)
  • Positioning
  • Develop analyze a positioning system (CLS)
  • Testbed in museums research park

18
Key Collaborations
  • Institute for Systems Research - University of
    Maryland, USA. Prof. Anthony Ephremides
  • University of North Carolina at Chapel Hill,
    Prof. Haipeng Shen and Prof. Kevin Jeffay
  • CNR (National Research Council, IT), Marco Conti
  • British Telecom (UK). Ongoing funding since 2001
  • FORTHnet S.A. Frame Agreement for Research
    Collaboration

19
Funding
EU
  • Marie Curie Excellence Grant
  • Marie Curie 2 re-integration grants
  • COST290 Traffic QoS Mgmt in Wireless
    Multimedia Nets

National (GSRT)
Industrial
  • CRETEWISE
  • Design, Mgmt, Security of Wireless Networks with
    QoS
  • Wireless Ad Hoc Networks security, trust, and
    routing
  • Sensor networks for structural health monitoring
  • 3D audio synthesis
  • British Telecom Future Wireless Networks
  • FORTHnet S.A. SLA provisioning monitoring
  • Intracom wireless smart cards
  • GRnet S.A. QoS mechanism evaluation

20
Foundation for Research and TechnologyHellas
(FORTH)Institute of Computer Science (ICS)
Telecommunications and Networks Laboratory (TNL)
Dr. Vasilios A. SirisBroadband and Wireless
Networking Activity Leader vsiris_at_ics.forth.gr htt
p//www.ics.forth.gr/netlab
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