Abstract:
Traditional Call Admission Control (CAC) schemes only consider
call level performance and are believed to be sufficient for the
circuit-switched wireless network. Since the future wireless
network will become packet-switched, the packet level performance
cannot be ignored. This is especially true when the TCP-type of
applications are running over such packet-switched wireless
networks, because TCP congestion control algorithm will exhaust
all the available resource until packet loss occurs. In order to
regulate the TCP applications to friendly coexist with other types
of services, we propose a TCP aware CAC scheme. We analyze the
system performance in both traditional and realistic cases,
respectively, and report that the exponential assumptions for
service holding time in our analysis can be greatly relaxed due to
so called ``insensitivity" property, which significantly expands
the applicable situations of our results. Extensive simulations
are presented under different scenarios to show that the proposed
scheme can effectively improve the system performance in terms of
call blocking probability, call level throughput (call/min) and
link utilization.
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Xinbing Wang：

North Carolina State University

Ph.D Candidate,

Major in Electrical and Computer Engineering, 2001－2006

Minor in Mathematics

AREA OF INTERESTS

My intention is to address the networking issues by applying (a) Probability and stochastic processes theory; (b) Optimization theory: linear programming, non-linear programming, convex optimization, dynamic control, etc; (c) Game theory: perfect game, partial game, etc. Specifically, my research interests are network congestion control and Quality of Service (QoS) analysis over wired and wireless networks. The topics I am interested in now are (i) TCP congestion control; (ii) Cross layer call admission control and optimization for wireless networks; (iii) Capacity of wireless networks; (iv) Asymptotical analysis of hybrid wireless systems (ad-hoc and infrastructure networks).