Foundation for Research and Technology Hellas FORTH Institute of

Foundation for Research and Technology–Hellas (FORTH) Institute of Computer Science (ICS) Telecommunications and Networks Laboratory (TNL) Dr. Vasilios A. Siris Broadband Wireless Networking Activity Leader vsiris@ics. forth. gr http: //www. ics. forth. gr/netlab

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Institute of Computer Science (ICS), FORTH One of FORTH’s 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 2

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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 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 3

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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 4

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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: Book publications: Conference publications: Citations: Growth of personnel 20 3 During 2000 -2004 38 441 (101 self sited) Project funds: 1. 630 K € (05 -08: 966 K €) Funds from services: 500 K € (05 -08 150 K €) 5

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Traffic Management in Next Generation Wireless/Wired Networks Efficient traffic management, seamless congestion control, and end-to-end Quality of Service (Qo. S) 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 Qo. S support in conjunction with security Evaluate using analysis, simulation & prototype implementation 6

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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 Qo. S 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 7

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Research approach & goals Performance & resource sharing objectives Abstract models for throughput/constraints Map models to mechanisms Wireless technology 8

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH TNL Infrastructure MAC/Network experimentation Linux/Mad. Wi. Fi 802. 11 MAC parameter control test-bed Wireless measurement equipment Air. Magnet Laptop Analyzer 2. 4/5 GHz and site surveyor Spectrum analyzers: Rohde&Schwarz FSH-6 (100 KHz-6 GHz), Spectran 6060 (1 MHz 6 GHz), low freq. detectors (3 Hz-3 GHz) 9

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH IEEE 802. 11 e WLAN test-bed Cisco 1200 Series Access Point IOS Version 12. 3(4)JA with WMM SNMP IEEE 802. 11 Qo. S MIB D-Link DWL-G 650 Wireless Cards Atheros 5211 chipset, Mad. Wi. Fi Used by Linux stations D-Link DWL-AG 660 Wireless Cards Atheros 5212 chipset Used by Window XP station MAC parameter control module SNMP STA 1 … STA 2 STA 11 STA 10 10

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH TNL Infrastructure (cont. ) Science and Technology Park – Crete (STEP-C) Hotspot: serves ~ 1000 users, based on 802. 11 g/a Heraklion Wireless MAN: Currently based on 802. 11 b, >100 Km 2 coverage, serving 30 stationary sites. Evolving into multi-hop, multi-channel multi-radio MESH test-bed 11

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Heraklion MESH: Advanced Metropolitan Multi-hop Multi-channel Test-bed N Under deployment Unique in Greece W E 12 nodes (mini PC/Linux) with S 2 -4 radio interfaces (802. 11 a/g, future Wi. MAX) Mad. Wi. Fi drivers, OLSR routing Test-bed for 802. 11 e Qo. S power control / channel ~4. 5 Km, 11 a, 54 Mbps selection load-based routing FORTH ~5 Km, 11 g, ≥ 34 Mbps 12

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Recent research activities Resource control for 802. 11 WLANs efficient utilization & throughput differentiation multi-rate operation, 802. 11 e 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 13

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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@csd. uoc. gr) 14

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Research Activities (1/2) Uncover deficiencies & identify possible optimizations ü Using measurements in large-scale production networks Propose realistic models & benchmarks for network topology, traffic demand, mobility Design and evaluate protocols for improving the Qo. S Emphasis on capacity planning, admission control, buffer management ü Employ realistic benchmarks & models in their evaluation ü 15

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Repository Online repository of ü Wireless measurement data Packet headers, snmp, syslog, signal quality ü Models (such as for flow & user arrivals) ü 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 16

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Research Activities (2/2) § Develop principles that enable devices to Efficient monitoring of networks ü Selection of the appropriate channel, network interface ü § Mobile peer-to-peer computing (mp 2 p) § Positioning ü Develop various mp 2 p systems (such as 7 DS) Develop & analyze a positioning system (CLS) ü Testbed in museums & research park ü 17

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH 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 18

TELECOMMUNICATIONS AND NETWORKS LABORATORY INSTITUTE OF COMPUTER SCIENCE, FORTH Funding EU: § Marie Curie: Excellence Grant § Marie Curie: 2 re-integration grants § COST 290: Traffic & Qo. S Mgmt in Wireless Multimedia Nets Industrial: § British Telecom: Future Wireless Networks § FORTHnet S. A. : SLA provisioning & monitoring § Intracom: wireless smart cards § GRnet S. A. : Qo. S mechanism evaluation National (GSRT): § CRETEWISE § Design, Mgmt, Security of Wireless Networks with Qo. S § Wireless Ad Hoc Networks: security, trust, and routing § Sensor networks for structural health monitoring § 3 D audio synthesis 19

Foundation for Research and Technology–Hellas (FORTH) Institute of Computer Science (ICS) Telecommunications and Networks Laboratory (TNL) Dr. Vasilios A. Siris Broadband Wireless Networking Activity Leader vsiris@ics. forth. gr http: //www. ics. forth. gr/netlab