Category Archives: 2019

New challenges and solutions to ISPs in online multiplayer gaming

Ty Sutherland
COO, WTFast, Kelowna BC



New Challenges and Solutions to ISPs in Online Multiplayer Gaming

Time & Date: 6:00–7:00 pm, Wednesday, October 2, 2019
Location: E103, 1000 KLO Rd., Okanagan College, Kelowna, BC

Talk Abstract: Online multiplayer gaming popularity is growing rapidly. With e-sports prize purses reaching into millions there is ever-growing desire to play popular games at a competitive level.  This presents new challenges to ISPs who struggle to keep up with growing demands on their network. Network demand can cause latency on the users’ connection which results in poor game experience and ultimately losing a match. WTFast helps to alleviate the pain for users by offering optimized latency-sensitive routing via their GPN, the game player’s network.

The WTFast GPN consists of hundreds of proxy nodes around the world which users connect to using the WTFast client. WTFast subscribers’ game traffic traverses the GPN and terminates near the game servers, often in the same data centers. WTFast has been working with the Okanagan College Computer Science department and NSERC to research new ways to further optimize the service. This talk will be beneficial to anyone interested in joining the NSERC project team or who is interested in online game networks.

Speaker Biography:  Ty Sutherland is COO at WTFast located in Kelowna BC.
WTFast provides network acceleration as a service to online gamers around the world. Ty has been involved in IT service management for over 20 years and has earned CCNA, PMP, ITIL and other certifications. Ty’s a lifelong learner and finds it very rewarding to help others unlock talents and build careers.

For further information please contact: Youry Khmelevsky (email: youry at
Refreshments and Pizza will be provided

Towards Formal Methods and Software Engineering for Deep Learning: Security, Safety, and Productivity for DL Systems Development

Youry Khmelevsky
Computer Science Department
Okanagan College, Kelowna, BC, Canada

Towards Formal Methods and Software Engineering for Deep Learning: Security, Safety, and Productivity for DL Systems Development
(co-sponsored by IEEE Okanagan Subsection)

Time & Date: 7:00–8:30 pm, Monday, September 16, 2019
Location: Lecture Theatre, (PL 107), Ashnola Building, Okanagan College Penticton Campus, 583 Duncan Avenue, Penticton, BC
Note: Admission is by donation. Funds will be used to help students in need (


Deep Learning (DL) techniques are now widespread and being integrated into many important systems. Their classification and recognition abilities ensure their relevance for multiple application domains far beyond pure signal processing. As a machine-learning technique that relies on training instead of explicit algorithm programming, they offer a high degree of productivity. But recent research has shown that they can be vulnerable to attacks and the verification of their correctness is only just emerging as a scientific and engineering possibility. Moreover, DL tools are not integrated into classical software engineering so software tools to specify, modify and verify them would make them even more mainstream as software-hardware systems. This talk will survey recent work and propose research directions and methodologies for this purpose.

Speaker Bio:

Youry Khmelevsky received his Ph.D. degree in computer science from the Institute of Simulation Problems in Power Industry, Academy of Sciences of Ukraine. His current research interests include software engineering; cloud and high-performance computing; large Web-based information systems (Oracle, DB2, Sybase, MS SQL); no programming paradigm and source code generation from UML models and software specifications; interdisciplinary applied computer science research. Dr. Khmelevsky had served as postdoctoral fellow at Harvard University; was a Visiting Scientist in the Computer Science and Artificial Intelligence Laboratory (CSAIL), Massachusetts Institute of Technology (MIT); was an Invited Researcher at LIP6, Sorbonne University, Paris, France; held engineering and R&D positions in Industry in Europe and North America for about 15 years, including at Alberta Energy, Government of Alberta, Canada.

For further information please contact: Youry Khmelevsky (email: Youry at
Registration is opened now:

80 Years of Research on Sum of Lognormal Random Variables: Recent Breakthroughs and Applications in Wireless Communications (coming soon)

Full Professor Julian Cheng
The School of Engineering, Faculty of Applied Science, at The University of British Columbia, Okanagan campus in Kelowna, BC, Canada.


80 Years of Research on Sum of Lognormal Random Variables: Recent Breakthroughs and Applications in Wireless Communications (coming soon)

Time & Date: TBA, September , 2019
Location: TBA, UBC Okanagan Campus
Registration: TBA


The distribution for the sum of lognormal random variables finds applications in many science and engineering disciplines, and it is particularly important for wireless communication engineers. However, the distribution for the simplistic sum of independent lognormal random variables is analytically intractable, and it is more so for a sum of correlated lognormal random variables with non-identical parameters. In 1934, Wilkinson from Bell Telephone Labs first studied this problem in an unpublished work. Since then, various approximations have been proposed in the literature. All these approximations fail to accurately quantify the left tail (or right tail) behavior of the distribution function of a sum of lognormal random variables. In this talk, in the context of diversity receptions over lognormal fading channels, we first present that the left tail distribution of the sum of independent lognormal random variables can be accurately represented by a Marcum Q-function. The proposed analytical result outperforms all existing well-known sum of lognormal approximations. Using a different approach, we then extend the problem to a sum of correlated and non-identically lognormal random variables, and show that its left-tail distribution can again be represented by another Marcum Q-function. Our study reveals a number of new and surprising engineering insights into the transmission characteristics over the lognormal fading channels. For example, for the dual-branch case, we show that the outage performance of negatively correlated lognormal channels is better than that of independent lognormal channels. We also show that under certain parameter conditions, one of the two lognormal channels can contribute no performance gain to the diversity reception systems. This implies that one link can be discarded without causing asymptotic performance loss. These new findings can guide the communication engineers to design better systems for transmission over the lognormal fading channels. 

Speaker Bio:

Julian Cheng received his PhD degree in electrical engineering from the University of Alberta, Edmonton, AB, Canada. He is currently a Full Professor in the School of Engineering, Faculty of Applied Science, at The University of British Columbia, Okanagan campus in Kelowna, BC, Canada. His current research interests include wireless communication theory, wireless networks, optical wireless communications, and quantum communications. Dr. Cheng has served as a member of technical program committee for many IEEE conferences and workshops. He co-chaired the 12th Canadian Workshop on Information Theory (CWIT 2011) in Kelowna, Canada. In 2012, he chaired the 2012 Wireless Communications in Banff, Canada. Dr. Cheng also chaired the sixth IEEE Optical Wireless Communications Symposium at the 2015 IEEE Global Communications Conference. He now volunteers as an Area Editor for IEEE Transactions on Communications. In the past, he served as an Associate Editor for IEEE Transactions on Communications,IEEE Transactions on Wireless CommunicationsIEEE Communications Letters, and IEEE Access, and was a past Guest Editor for a special issue of IEEE Journal on Selected Areas in Communicationson optical wireless communications. Currently, he serves as the President of the Canadian Society of Information Theory.

For further information please contact: Julian Cheng (email: Julian.Cheng at or/and Youry Khmelevsky (email: Youry at
Refreshments will be provided