Foundation for Research and Technology–Hellas (FORTH) Institute of Computer Science (ICS)

Foundation for Research and Technology–Hellas (FORTH)

Institute of Computer Science (ICS)

Dr. Vasilios A. SirisBroadband and Wireless Networking Activity Leader

[email protected]

http://www.ics.forth.gr/netlab

Telecommunications and Networks Laboratory (TNL)

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TELECOMMUNICATIONS AND NETWORKS LABORATORYINSTITUTE OF COMPUTER SCIENCE, FORTH

Institute of Computer Science (ICS), FORTH

One of FORTH’s 7 institutes Established 1983Personnel: 247 (2005)

Researchers/Univ. Faculty: 33Technical: 106Administrative/Support: 19Grads/Undergrads: 57/32

LaboratoriesCenter for Medical Informatics & Health Telematics Computer Vision and RoboticsHuman Computer InteractionInformation SystemsComputer Architecture & VLSITelecommunications & Networks FORTH-ICS

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Telecommunications & Networks Lab ActivitiesTelecommunications & Mobile Communications

Trust, cooperation, power efficiency in ad hoc networks

Wireless network security with focus on GSM/UMTS, 802.11

Broadband and Wireless NetworkingResource 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 ProcessingStatistical 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

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TNL RTD Goals

Explore novel network architecturesAd-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

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TNL at a glanceResearchers: 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 funds:1.630K € (05-08: 966K €)

Funds from services: 500K € (05-08 150K €)

During 2000 -2004

Growth of personnel

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Traffic Management in Next Generation Wireless/Wired Networks

Efficient traffic management, seamless congestion control, and end-to-end Quality of Service (QoS) support

ImportanceIncreased access to Internet through wireless networks

Different users/applications demand different quality

Objectives / Expected resultsDevelop 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

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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 studiesImportance

Wireless networks is a key technology for providing cost-effective broadband access in rural and densely populated areasCurrent design focuses on best-effort services, increased use of Voice-over-IP and streaming videoSecurity up to now isolated from QoS support

Objectives / Expected resultsDevelop new techniques for design and management of secure wireless networksExperiment with new technologies in advanced local and metropolitan area test-bedsProvide high-quality consulting, spectrum measurement services

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Performance & resource sharing

objectives

Research approach & goals

Wireless technology

Abstract models for throughput/constraints

Map models tomechanisms

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TNL Infrastructure

MAC/Network experimentation Linux/MadWiFi 802.11 MAC parameter control test-bed

Wireless measurement equipmentAirMagnet Laptop Analyzer 2.4/5 GHz and site surveyor

Spectrum analyzers: Rohde&Schwarz FSH-6 (100KHz-6GHz), Spectran 6060 (1MHz-6GHz), low freq. detectors (3Hz-3GHz)

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IEEE 802.11e WLAN test-bed

MAC parameter control module

SNMP

STA 1

STA 2

STA 11

STA 10

…

Cisco 1200 Series Access Point IOS Version 12.3(4)JA with WMMSNMP IEEE 802.11 QoS MIB

D-Link DWL-G650 Wireless CardsAtheros 5211 chipset, MadWiFiUsed by Linux stations

D-Link DWL-AG660 Wireless CardsAtheros 5212 chipsetUsed by Window XP station

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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, >100 Km2 coverage, serving 30 stationary sites. Evolving into multi-hop, multi-channel multi-radio MESH test-bed

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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

FORTH

NN

EEWW

SS

~5Km, 11g, ≥34Mbps

~4.5Km, 11a, 54Mbps

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Recent research activities

Resource control for 802.11 WLANsefficient utilization & throughput differentiationmulti-rate operation, 802.11e EDCA & HCCA modescoexistence of real-time and elastic trafficunsaturated traffic conditions

Access point selectiondelay-based selection for achieving throughput fairness

SINR and power control in ad hoc networkstradeoff between SINR threshold and connectivity

Power and channel control for dense WLANscell-breathing for load-balancingconsider MAC/network layer performance in target objective

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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([email protected])

mailto:[email protected]

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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

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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.htm

Login/ password access after free registration

http://www.cs.unc.edu/Research/mobile/datatraces.htm

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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

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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

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Funding

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

Industrial:Industrial: National (GSRT):National (GSRT): British Telecom: Future

Wireless Networks FORTHnet S.A.: SLA

provisioning & monitoring Intracom: wireless smart cards GRnet S.A.: QoS mechanism

evaluation

Marie Curie: Excellence Grant Marie Curie: 2 re-integration

grants COST290: Traffic & QoS Mgmt

in Wireless Multimedia Nets

EU:EU:

Foundation for Research and Technology–Hellas (FORTH)

Institute of Computer Science (ICS)

Dr. Vasilios A. SirisBroadband and Wireless Networking Activity Leader

[email protected]

http://www.ics.forth.gr/netlab

Telecommunications and Networks Laboratory (TNL)

Foundation for Research and Technology–Hellas (FORTH) Institute of Computer Science (ICS)

Documents

Transcript of Foundation for Research and Technology–Hellas (FORTH) Institute of Computer Science (ICS)