Transcript No Slide Title

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
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
Focus of My Research Group
• Network architectures, protocols, management algorithms,
modeling and performance evaluations
• Two main thrusts:
– Wireless telecom 3G and beyond
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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
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Wireless personal area networks
Wireless sensor networks
Vehicular ad hoc networks and vehicle-infrastructure integration
Wireless body area networks
RFID networks
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
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
Cognitive Wireless Local Area Network
over Optical Fibres (CWLANoF)
System Concept and Research Issues
Cognition Cycle
From J. Mitola III, “Cognitive Radio for Flexible Mobile Multimedia Communications”,
Kluwer Mobile Networks and Applications, vol. 6, pp. 435–441, 2001
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)
CWLANoF vs. Conventional ESS
AP
WLAN
Controller
Digital
Conventional ESS
CSMA
2
1
RAU
CAP
2 fibers
Analog
CWLANoF ESS
Cognitive WLAN over Fibre
System Architecture
RAU
From/to
RAU #1
Optical Interface
(E/O and O/E)
From/to
RAU #N
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RF / Baseband
8 fibers
Optical Interface
(E/O and O/E)
RF / Baseband
A/D
DSP
802.11a/b/g WLAN protocol
parallel processing units
Central
Contro
l Unit
(CCU)
Spectrum Usage Assessment
Bridge to 802.3 Ethernet
CAP
Ethernet
Cognitive Access Point (CAP)
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
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
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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
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
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
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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!
Thank you!