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Cross layer resource allocation for fault-tolerant topology control in wireless mesh networks based on genetic algorithm

机译:基于遗传算法的无线网状网络中容错拓扑控制的跨层资源分配

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摘要

Abstract Optimal topology control is an essential factor for efficient development of wireless mesh networks. For this purpose, a set of available tools can be exploited including power control, rate adaptation, channel assignment, channel selection, scheduling and routing. In most recent studies, only some of these tools are applied for throughput maximization. In this paper, we first propose a comprehensive cross-layer resource allocation model for topology control in which a complete set of available tools are exploited in order to guarantee the fairness, balancing and robustness, in addition to throughput maximization. This leads to an NP-complete problem; therefore, we propose a four steps heuristic method based on problem decomposition to reduce the computational complexity. In first step, the best K potential paths with disjoint vertices are extracted between each pair of nodes. In second step, a method based on the genetic algorithm is proposed in order to assign frequency channels to the links of these paths. This assignment procedure must preserve the essential links and must reduce the potential interference of the network. In third step, best compatible configurations are extracted on each frequency channel using power control and rate adaptation. It must be performed such that minimizes the power consumption, maximizes the transmission rate and provides the transmission rate balancing on the links. In last step, a cross-layer method is proposed for selecting the best path between each pair of nodes such that throughput maximization, fairness, and balancing on nodes and frequency channels are met. Validation in terms of numerical results demonstrates the efficiency of our proposed method for topology control in wireless mesh networks.
机译:摘要最佳拓扑控制是有效开发无线网状网络的必要因素。为此目的,可以利用一组可用的工具,包括功率控制,速率适应,通道分配,频道选择,调度和路由。在最近的研究中,只应用其中一些工具用于吞吐量最大化。在本文中,我们首先提出了一种用于拓扑控制的全面跨层资源分配模型,其中利用了一整套可用的工具,以保证公平性,平衡和稳健性,除了吞吐量最大化。这导致了NP完全的问题;因此,我们提出了一种基于问题分解的四个步骤启发式方法,以降低计算复杂性。在第一步中,在每对节点之间提取具有不相交顶点的最佳K电位路径。在第二步中,提出了一种基于遗传算法的方法,以便将频道分配给这些路径的链路。此分配过程必须保留基本环节,并且必须降低网络的潜在干扰。在第三步中,使用功率控制和速率自适应在每个频率通道上提取最佳兼容配置。必须执行,使其最小化功耗,最大化传输速率并提供链路上的传输速率平衡。在最后一步中,提出了一种用于选择每对节点之间的最佳路径的横向方法,使得满足节点和频率信道的吞吐量最大化,公平性和平衡。在数值结果方面验证演示了我们在无线网状网络中拓扑控制的提出方法的效率。

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