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Seminar: ECE Faculty Candidate Thursday Zhu Han Electrical and Computer Engineering
Department How to Cooperate in Wireless Networks:
Game Theoretical Approaches for Resource Allocation Wireless resource allocation is an
important strategy to combat detrimental effects of wireless channels, optimize
the allocations of limited resources, and control the interferences, so as to
provide the desired services and optimize the system performances. To reduce
the overhead and signaling imposed by such strategy, the mobiles of the next
generation networks have their own autonomies for resource allocation in a
distributive way. However, users’ non-cooperative competition of the
radio resources results in low system efficiency. So how to ensure cooperation
among autonomous and distributed users is one of the most important wireless
networking research topics. In this talk, we propose a general game theoretical
framework to enforce cooperation by the following approaches: incentive-based,
referee-based, punishment-based, and relay/collaborative-communication-based.
For incentive-based approach, different from the traditional “Pricing
Anarchy”, we propose a bargaining method to have mutual benefits.
Specifically, a fair and simple scheme to allocate subcarrier, rate, and power
for multiuser single cell 4G/WLAN OFDMA systems is considered. The problem is
to maximize the overall system rate, under each user's maximal power and
minimal rate constraints, while considering the fairness among users. The
approach proposes the fairness and low complexity implementation based on Nash
Bargaining Solutions and Coalitions. We also briefly mention the other
approaches. For referee based-approach, a virtual mediator is introduced to
improve the outcome of the non-cooperative game, which is employed to
multi-cell WMAN/OFDMA networks. For relay/collaborative-communication-based
approach, a buyer/seller game such as Stackelberg game is studied to have
distributive resource allocation over this new communication paradigm. Finally,
for the punishment-based approach, a repeated game with threat of future
punishment is proposed to suppress users' greediness and enforce cooperation in
Ad Hoc networks. Biography: Dr. Zhu Han received his BS in Electronic
Engineering from |
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