Title: Foundation for Research and TechnologyHellas FORTH Institute of Computer Science ICS
1Foundation 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
2Institute 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
3Telecommunications 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
4TNL 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
5TNL 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
6Traffic 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
7Design, 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
8Research approach goals
Performance resource sharing objectives
9TNL 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)
10IEEE 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
11TNL 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
12Heraklion 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
13Recent 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
16FORTH 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
18Key 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
19Funding
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
20Foundation 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