Joint Performance Optimization of Wireless Networks and Control Systems

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Joint Performance Optimization of Wireless Networks and Control SystemsCurrent control technology is not well suitedto operation over a packet based network, and conversely,most networks are not optimized for control applications. Moreover, critical network performance parameters that affect controlsystem performance, such as bit ratesand delay and packet loss statistics, depend on variouschoices made in the network, such as powers allocated to wirelesstransmitters, bandwidths or time-slot fractions allocated to channels, and routing methods.So in addition to the challenge of working out how a controlsystem can be made to work in a packet-based networked environment, we alsohave the challenge of working out how the network should be configured, or operated, so as to improve control system performance.This proposal addresses two fundamental issues that arise.Neither solves the whole problem, but each addresses a critical issue.The first topic involves joint optimization ofa controller and critical communication and networkparameters such as transmit powers, packet routing, andbandwidth and time-slot allocation. To simplify this problem, only the affects of thesenetwork parameters on bit rates, hence quantization noise, is considered. The second topic considered issimultaneous routing and resource allocation for wirelessdata networks.This is the problem of jointly finding an optimal setof flows and communication resources that maximize the performance ofthe network, with respect to some objective such as optimalcontrol system performance.Here we hope to develop algorithms to dynamically allocatecommunication resources (such as transmit powers, bandwidth)and simultaneously optimize routing decisions.