Joint Performance Optimization of Wireless Networks and Control Systems

无线网络和控制系统的联合性能优化当前的控制技术不太适合在基于分组的网络上运行，相反，大多数网络没有针对控制应用进行优化。此外，影响控制系统性能的关键网络性能参数，如比特率、延迟和分组丢失统计，取决于网络中的各种因素，如分配给无线发射机的功率、分配给信道的带宽或时隙比例以及路由方法。因此，除了解决如何使控制系统在基于分组的网络环境中工作的挑战之外，我们还面临解决网络应该如何配置或操作以提高控制系统性能的挑战。该方案解决了出现的两个基本问题。但每个主题都涉及一个关键问题。第一个主题涉及控制器和关键通信和网络参数的联合优化，如发射功率、分组路由、带宽和时隙分配。为了简化这个问题，只考虑了网络参数对比特率的影响，即量化噪声。第二个主题是无线数据网络的同时选路和资源分配问题。这是一个联合寻找一组流量和通信资源的最优集合的问题，该问题相对于诸如最优控制系统性能这样的目标最大化网络的性能。这里我们希望开发算法来动态分配通信资源(如发射功率、带宽)，同时优化路由决策。

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.