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Bell Canada Chair in Multimedia @ UofT
Opportunistic WIFI Mesh Infrastructure for Broadband
Wireless Internet Access (OMESH)

enable the cost-effective WiFi (IEEE 802.11)
broadband Internet access over massive geographic
areas, accommodating real-time services such as
voice and video over Internet (VoIP);
enable the way of drop-and-play deployment, such
that the mesh WiFi stations of consumers (enterprise
or home users) can seamlessly be interconnected
with those of service providers, achieving ubiquitous
service coverage
enable a low power mesh, such that the mesh
stations can be using solar power in outdoor
environments, and thereby be mounted wherever
needed with little costs.


Challenges

Scalability

Data Management

Sustainability
o Node Energy constraints
o Node Control

Security and Privacy
Our approach

Opportunistic utilization of network
resources.

Embedded Wireless Interconnect
(EWI) and Cognitive Networking
o low power, low delay cross
layer architecture
o cognitive radio approach
 Biometrics, user centric, data level
security
The OMESH infrastructure will allow anyone with a WiFi
equipped device (i.e. laptop, PDA, iPhone, Zune, among
others) to download video, or chat over Internet,
anywhere, anytime: enhancing the capacity of cellular
networks.
Recent Publications:
1.
Liang Song, and Dimitrios Hatzinakos, “Cognitive Networking
of Large Scale Wireless Systems,” International Journal of
Communication Networks and Distributed Systems, vol. 2, no. 4,
pp. 452-475, 2009.
2.
Liang Song, and
Communications in
Dimitrios Hatzinakos,
Large Scale Wireless
“Real-time
Networks,”
Contact: D. Hatzinakos, (dimitris@comm.utoronto.ca) , Liang Song, (songl@comm.utoronto.ca)
International Journal of Multimedia Broadcasting, vol. 2008 (2008), article ID 586067, doi:10.1155/2008/586067.
3.
Liang Song, and Dimitrios Hatzinakos, “Wireless Sensor Networks: From Application Specific to Modular Design,” INTECH 2009, IBSN: 978-3-902613-49-3.
4.
Liang Song, and Dimitrios Hatzinakos, “Energy Efficiency Limits of Broadcasting in Wireless Networks,” IEEE Trans.
on Wireless Communication, vol. 7, no. 7, July 2008.
5.
Liang Song, and Dimitrios Hatzinakos, “A Cross-layer Architecture of Wireless Sensor Networks for Target Tracking,”
IEEE/ACM Trans. on Networking, vol. 15, no. 1, pp. 145-158, Feb. 2007.
6.
Liang Song, and Dimitrios Hatzinakos, “Architecture of Wireless Sensor Networks with Mobile Sinks: Sparsely
Deployed Sensors,” IEEE Trans. on Vehicular Technology, vol. 56, no. 4, Part 1, pp. 1826-1836, July 2007.
7.
Liang Song, and Dimitrios Hatzinakos, “Architecture of Wireless Sensor Networks with Mobile Sinks: Multiple Access
Case,” International Journal of Distributed Sensor Networks, vol. 3, no. 3, pp. 289-310, July 2007.
8.
Liang Song, and Dimitrios Hatzinakos, “Cooperative Transmission in Poisson Distributed Wireless Sensor Networks:
Protocol and Outage Probability,” IEEE Trans. on Wireless Communications, vol. 5, no. 10, pp. 2834-2843, Oct. 2006.
9.
Liang Song, “Cognitive Networks: Standardizing the Large Scale Wireless Systems,” IEEE 2nd Workshop on Cognitive
Radio Networks, Las Vegas NV, Jan. 2008.
10. Liang Song, “Wireless Mesh Infrastructure Supporting Broadband Internet with Multimedia Services,” IEEE
International Conference on Circuits and Systems for Communications, Shanghai, China, 2008.
11. Liang Song, and Dimitrios Hatzinakos, “Prototypes of Opportunistic Wireless Mesh Networks Supporting Real-time
Services,” IEEE 5th Consumer Communications and Networking Conference (CCNC), Las Vegas NV, Jan. 2008.
12. Liang Song, Dimitrios Hatzinakos, and Xiaoyu Wang, “Wireless Mesh Infrastructure for Ubiquitous Voice and Video,”
IEEE 5th Consumer Communications and Networking Conference (CCNC) - Demonstration, Las Vegas NV, Jan. 2008.
13. Liang Song, and Dimitrios Hatzinakos, “Architecture for Supporting Real Time Traffic in Large Scale Wireless
Networks,” 1st IEEE International Workshop on Specialized Ad Hoc Networks and Systems (in conjunction with
International Conference on Distributed Computing Systems – ICDCS), Toronto, Canada, Jun 2007.
14. Liang Song, and Dimitrios Hatzinakos, “Embedded Wireless Interconnect for Sensor Networks: Concept and Example,”
IEEE 4th Consumer Communications and Networking Conference (CCNC), Las Vegas NV, Jan. 2007.
15. Liang Song, and Dimitrios Hatzinakos, “Dense Wireless Sensor Networks with Mobile Sinks”, IEEE International
Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. 3, pp. 677-680, Philadelphia PA, Mar. 2005.
16. Liang Song, Raviraj Adve, and Dimitrios Hatzinakos, “Matrix Pencil for Positioning in Wireless Ad Hoc Sensor
Network,” 1st European Workshop on Wireless Sensor Networks (EWSN), Berlin German, Jan. 2004.
Contact: D. Hatzinakos, (dimitris@comm.utoronto.ca) , Liang Song, (songl@comm.utoronto.ca)