1. Wireless Networks and Services Ten Years Down the Road Prof. Victor C. M. Leung TELUS Mobility Research Chair in Advanced Telecom. Eng. Department of Electrical and Computer Engineering The University of British Columbia, Canada www.ece.ubc.ca/~vleung WCNC 2009 Wireless Panel Budapest, Hungary April 7, 2009 © 2009

2. Current Trends in Wireless Networking Support of applications and services will continue to migrate towards IP-based broadband networks Portable devices will be equipped to support multiple wireless standards –Multiple wireless interfaces –Software defined radios Users have multiple alternatives for network access and need various aids for decision making License-free wireless will play an important role in interconnecting electronic devices in homes and work places –Broadband wireless for multimedia entertainment devices –Lower rate longer range wireless for monitoring and control –Practical civilian deployment of wireless ad hoc and sensor networks

3. Focus of My Research Group Network architectures, protocols, management algorithms, modeling and performance evaluations Two main thrusts: –Wireless telecom 3G and beyond Radio resource management for high speed packet access Interworking of heterogeneous wireless networks Handoff and mobility management Quality of service provisioning Authentication, authorization and accounting –Networking for license-free wireless communications Wireless personal area networks Wireless sensor networks Vehicular ad hoc networks and vehicle-infrastructure integration Wireless body area networks RFID networks

4. Current Collaborative Research Projects Wireless telecom 3G and beyond Provisioning and management of IP-based multimedia mobility services over heterogeneous broadband wireless networks Towards the next generation telecommunication networks - Service integration over multi-technology access networks Interworking between cooperative access networks over IP backbone Dynamic resource allocation for uplink packet access in cellular networks Networking for license-free wireless communications Enabling technologies for secure and reliable wireless body area sensor networks Vehicular telematics over WiFi and WiMAX multihop networks Reliable and trusted networking for data-centric wireless access with applications to vehicular telematics RFID-based sensor networks for detecting and tracking mobile targets

5. Future Challenges in Wireless Networking Higher data rate, better coverage, longer battery life, lower cost Cognitive radio network  cognitive wireless network Convergence of wireless and optical networking technologies Wireless access becoming a commodity / utility –Applications, applications, applications User-friendly technology-agnostic wireless access –Convergence of access networks and application services over core IP network result in break down of service silos –Need to manage subscriber access over multiple heterogeneous access networks for ubiquitous service access with uniform quality Application specific wireless networking –Wireless networking for intelligent transportation system –Wireless body area network, wireless healthcare / e-medicine –Wireless home networking interconnecting multimedia entertainment devices, security devices, home control systems –Wireless enabled intelligent power grids

6. Cognitive Wireless Local Area Network over Optical Fibres (CWLANoF) System Concept and Research Issues

7. Cognition Cycle From J. Mitola III, “Cognitive Radio for Flexible Mobile Multimedia Communications”, Kluwer Mobile Networks and Applications, vol. 6, pp. 435–441, 2001

8. RF over Fibre Uses low cost uncooled directly-modulated laser diodes –Distributed feedback (DFB) lasers –Vertical-cavity surface-emitting lasers (VCSELs) Flat frequency response over wide frequency range (> 2 GHz)

9. CWLANoF vs. Conventional ESS WLAN Controller CAP 2 fibers Digital Analog RAU AP 12 CSMA Conventional ESS CWLANoF ESS

10. Cognitive WLAN over Fibre System Architecture RAU CAP Ethernet 8 fibers Optical Interface (E/O and O/E) RF / Baseband Optical Interface (E/O and O/E) RF / Baseband … Bridge to 802.3 Ethernet Central Contro l Unit (CCU) From/to RAU #1 From/to RAU #N 802.11a/b/g WLAN protocol parallel processing units A/D DSP Spectrum Usage Assessment Cognitive Access Point (CAP)

11. Functions of CAP Receive full spectrum of ISM band Receive multiple WLAN channels Cooperatively demodulate user packets received over multiple RAUs Identify and localize all sources of interference Transmit full spectrum of ISM band Transmit multiple WLAN channels Cooperatively transmit user packets over multiple RAUs Interference mitigation –Cancellation –Avoidance Multiple-RAU management –Diversity –Multi-input Multi-output –Beam forming Radio resource management –Channel selection –Signalling diversity –Transmission scheduling –Transmit power control Connection admission control Quality of service assurance

12. Research Issues Proposed CWLANoF architecture offers potential for many new research problems and novel solutions Objective is to take advantage of the unique features of the proposed architecture by developing novel communication techniques –New signal processing algorithms Spectrum sensing techniques MIMO Beam forming Interference cancellation –New radio resource management algorithms Channel and power allocation Interference avoidance –New MAC and network management protocols Performance evaluations challenging due to needs target dynamic environments

13. CWLANoF Testbed Testbed consists of Zinwave DAS and powerful DSP-based SDR platform CDN$150K NSERC Research Tools and Instruments grant awarded Research on radio management issues in progress

14. Ten Years Down The Road Wireless communications and networking becoming a cross-discipline multi-disciplinary research area Micro- and nano-scale wireless communications –Wireless network on a chip –Wireless-enabled in-body biomedical devices User-centric wireless networking –The right tool for the environment –Cognitive of the needs of the user and the environmental constraints The wireless utility –Delivery of more than digital data We need to collaborate with colleagues in other areas!

15. Thank you!