论文标题
与非线性对数能量收集模型的WPT系统中能量公平性的联合正交带和功率分配
Joint Orthogonal Band and Power Allocation for Energy Fairness in WPT System with Nonlinear Logarithmic Energy Harvesting Model
论文作者
论文摘要
无线功率传输（WPT）有望通过提供物联网传感器的永久操作来在物联网服务中发挥重要作用。但是，为了延长物联网网络的寿命，需要有效的资源分配算法，尤其是物联网传感器之间的能量公平问题一直是WPT系统的关键挑战。在本文中，将能量公平视为所有能量贫困IOT传感器（Emiss）的最低能量，我们使用能量波束成形将正交频带分配给几个偏离的频段，并在每个正交带上传递RF功率。基于能量贫困，我们提出了正交频带分配规则，并以较少的能量授予了episs的优先级。我们还制定了两个传输功率分配问题，并结合了非线性对数 - 能量收获（EH）模型。首先，通过将著名的Karush-Kuhn-Tucker（KKT）条件与改良的水填充算法相结合，提出和解决了总收到的功率最大化（TRPM）问题。其次，公共接收的功率最大化（CRPM）问题是制定的，并使用迭代分配搜索方法得出了最佳解决方案。要将一分解搜索方法应用于问题，本文提出了一种指定解决方案范围的方法，以根据单调函数之和定义的目标函数。在数值结果中，假设一个维持一维随机步行模型的迁移率，则表现出了子宫运动对所有体育症最低能量的迁移率的有效性。最后，通过比较其他资源分配方案（例如循环版本和平等功率分布）来验证拟议的资源分配方案的性能
Wireless power transmission (WPT) is expected to play an important role in the Internet of Things services by providing the perpetual operation of IoT sensors. However, to prolong the IoT network's lifetime, the efficient resource allocation algorithm is required, in particular, the energy fairness issue among IoT sensors has been a critical challenge of the WPT system. In this paper, considering energy fairness as the minimum received energy of all energy poverty IoT sensors (EPISs), we allocate orthogonal frequency bands to several EPISs and transfer the RF power on each orthogonal band, using energy beamforming. Based on the energy poverty, we propose orthogonal frequency bands assignment rule, granting the priority to the EPISs with less received energy. We also formulate two transmission power allocation problems, incorporated the nonlinear logarithm-energy harvesting (EH) model. First, the total received power maximization (TRPM) problem is presented and solved by combining the well-known Karush-Kuhn-Tucker (KKT) conditions with the modified water-filling algorithm. Second, the common received power maximization (CRPM) problem is formulated and the optimal solution is derived using the iterative bisection search method. To apply the bisection search method to the problem, this paper proposes a method of specifying the scope of the solution for the objective function defined by the sum of monotonous functions. In numerical results, assuming the mobility of EPISs by the one-dimensional random walk model, the effectiveness of the mobility of EPISs on the minimum received energy of all EPISs is presented. Finally, the performance of the proposed resource allocation schemes is verified by comparing other resources allocation schemes, such as Round robin and equal power distribution
