Keynote Speakers
Oct. 18th,
8:45am - 9:30am
Session Chair: Dr. A. Boukerche (Univesrity of Ottawa, Canada)
Keynote Address: Dr. Sanjoy Paul (Director
of Wireless Networking Research, Bell Laboratories)
Title: Providing End-to-End QoS for Multimedia Applications in Converged
Wired/Wireless Networks
Abstract:
Telecommunications industry is facing two dominant trends. First, broadband
access in the form of cable, fiber to home and WiMAX (IEEE 802.16) is providing
a high-bandwidth pipe to people's home and to small-medium businesses. Second,
there is a fundamental shift from circuit-switched networks to packet-switched
networks. The implication of broadband access is an opportunity for providing
richer multimedia applications and services. Applications such as multimedia
streaming require high bandwidth; whereas applications such as Voice over IP (VoIP),
Push-to-Talk (PTT), online gaming require low delay/jitter; yet applications
like video conferencing require both high bandwidth and low delay/jitter. QoS,
therefore, means low latency, low delay/jitter, low loss, adequate bandwidth and
above all, good end-user experience. However, all the metrics do not necessarily
apply to all applications and hence it's a challenge for the service provider to
build an infra-structure that can provide end-to-end QoS for applications with
variety of QoS needs. The second trend towards converged networks and services
implies the need for a unified service architecture that is independent of the
access network. The unified service architecture needs a SIP-based signaling and
control infra-structure to support QoS-control on a per-user (or
per-class-of-users) and per-application or (per-class-of-applications) basis.
While basic mechanisms are provided by IETF
protocols, a carrier grade implementation of such QoS control requires a more
robust and systematic design of the service infra-structure. Unified signaling
plane for QoS control is not enough to guarantee QoS of multimedia services.
There needs to be equivalent carrier-grade support for the bearer plane as well.
DiffServ-aware MPLS Traffic Engineering is fulfilling that need.
The talk will address the above issues and describe how Service Providers are
building carrier-grade networks to support Quality of Service in Converged
access-agnostic networks. There will be a special focus on 3G Wireless Access.
Biography:
Sanjoy Paul is currently the Director of Wireless Networking Research at Bell
Laboratories. Before that he was the Chief Technology Officer at Edgix. He has
over fifteen years of technology expertise, specifically in the areas of
multicasting, media streaming, intelligent caching, mobile networking, and
secure commerce. Prior to joining Edgix, Sanjoy was a Distinguished Member of
Technical Staff at the Bell Laboratories Research, where he was the chief
architect and visionary of Lucent's IPWorX (later called Imminet) caching and
content distribution product line. Sanjoy is well regarded in the technical
community for his contributions to the field of Internetworking: designing the
Reliable Multicast Transport Protocol (RMTP), holding twenty U.S patents,
publishing a book on Multicasting and numerous papers, and receiving the 1997
William R. Bennett award from IEEE Communications Society for the best original
paper published in IEEE/ACM Transactions on Networking. Sanjoy is a Fellow of the IEEE, an editor of IEEE/ACM Transactions on Networking, and an
adjunct faculty of WINLAB at Rutgers University. He holds a Bachelor of
Technology degree from Indian Institute of Technology, Kharagpur, India and both
an M.S and a Ph.D. degree from the University of Maryland, College Park.
Oct. 19th,
8:45am - 9:30am
Session Chair: Dr. A Boukerche (University of Ottawa, Canada)
Dr. Sajal K. Das
(Professor of Computer Science and
Engineering,
University of Texas at Arlington)
Title: Dynamic Resource Management in Competitive Wireless Data
Networks: A Game Theoretic Framework
Abstract:
The competition among wireless data service providers brings in an option for
the unsatisfied customers to switch their providers, which is called churning.
The implementation of Wireless Local Number Portability (WLNP) is expected to
further increase the churn rate (the probability of users switching the
provider). However, the existing resource management algorithms for wireless
networks fail to fully capture the far-reaching impact of this unforeseen
competitiveness. From this perspective, we will first formulate non-cooperative
games between the service providers and the users. A user's decision to leave or
join a provider will be based on a finite set of strategies. A service provider
can also construct its game strategy sets so as to maximize their utility
(revenue) considering the churn rate.
Based on the game theoretic framework, we will propose an integrated admission
and rate control (ARC) framework for CDMA based wireless data networks. The
admission control will be at the session (macro) level while the rate control at
the link layer packet (micro) level. Two admission control modes will be
considered: one-by-one mode and batch processing mode in which multiple users
are admitted at a time. We show that: (i) for the one-by-one mode, the Nash
equilibrium in pure strategy can be established for both under-loaded and
fully-loaded systems; and (ii) for batch processing mode, there is either an
equilibrium in pure strategy, or a dominant strategy exists for the service
provider. Therefore, the providers have clearly defined admission criteria as
outcome of the game. Users are categorized into multiple classes and offered
differentiated services based on the price they pay and the service degradation
they can tolerate. We show that the proposed ARC framework significantly
increases the provider's revenue and also successfully offers differentiated QoS
to the users.
Biography:
Dr. Sajal K. Das is a Professor of Computer Science and Engineering and also the
Founding Director of the Center for Research in Wireless Mobility and Networking
(CReWMaN) at the University of Texas at Arlington (UTA). His current research
interests include resource and mobility management in wireless networks, mobile
and pervasive computing, wireless multimedia and QoS provisioning, sensor
networks, mobile Internet protocols, distributed processing and grid computing.
He has published over 250 research papers, directed numerous funded projects,
and holds 5 US patents in wireless mobile networks. He is a recipient of Best
Paper Awards in ACM MobiCom'99, ICOIN'01, ACM MSWIM'00, and ACM/IEEE PADS'97.
Dr. Das is also a recipient of UTA's Outstanding Faculty Research Award in
Computer Science in 2001 and 2003, and UTA's College of Engineering Excellence
in Research Award in 2003. He is frequently invited as keynote speaker at
international conferences.
Dr. Das is the Editor-in-Chief of the Journal of Ubiquity, Mobility and
Pervasive Computing (JUMP), and also serves on the Editorial Boards of the IEEE
Transactions on Mobile Computing, ACM/Kluwer Wireless Networks, Parallel
Processing Letters, Journal of Parallel Algorithms and Applications. He served
as General Chair of IEEE WoWMoM'05, IEEE PerCom'04, IWDC'04, ICIT'03 and IEEE
MASCOTS'02; General Vice Chair of IEEE PerCom'03, ACM MobiCom'00 and HiPC'00-01;
General Chair of ACM WoWMoM'00-02; Program Chair of IWDC'02, WoWMoM'98-99; TPC
Vice Chair of ICPADS'02; and as TPC member of numerous IEEE and ACM conferences.
He is the Vice Chair of IEEE TCPP and TCCC, and on the Advisory Boards of
several cutting-edge companies.
Prior to 1999, Dr. Das was a professor of computer science at University of
North Texas where he twice (1991 and 1997) received the Student Association's
Honor Professor Award for best teaching and scholarly research. He received
B.Tech. degree in 1983 from Calcutta University, M.S. degree in 1984 from Indian
Institute of Science, Bangalore, and PhD degree in 1988 from the University of
Central Florida, Orlando, all in Computer Science.