CIF: Small: Collaborative Research: Communications with Energy Harvesting Nodes

由可以从环境中获取能量的节点组成的无线网络代表了绿色通信的未来。在全球范围内，利用收集的环境能量可以改善无线设备对环境的影响，同时无限期地延长网络寿命，使设备真正实现移动。能量收集（EH）以可用能量的随机性和间歇性的形式为系统设计带来了新的维度，以及额外的系统问题，如能量存储容量和处理复杂性。此外，EH无线网络的部署需要新的资源和干扰管理技术、EH节点之间的合作以及网络的跨层优化。研究了由EH节点组成的无线网络所带来的一系列新挑战。研究方向分为四大重点。(1)第一个挑战是了解信息理论背景下EH通信的基本限制，考虑到可用能量的随机和间歇性供应，有限的电池容量与存储和提取效率。低权力和高权力政权的特殊情况特别令人感兴趣。(2)为了有效利用可用资源，利用资源分配问题的内在结构，在EH网络中进行联合能量调度和频谱和/或空间资源分配成为一个重要问题。(3)网络中不同的EH节点可以通过电力线之间的存在或无线充电来共享它们收集的能量。该研究研究了能源和数据合作的先前重点。(4)在数据和能量排队稳定性约束下，研究了有效的分布式跨层解决方案，以最大化系统总效用。

Wireless networks composed of nodes that can harvest energy from the environment represent the green future of communications. Utilizing the harvested ambient energy improves the environmental impact of wireless devices in the global scale, while extending the network lifetime indefinitely and making the devices truly mobile. Energy harvesting (EH) brings new dimensions to system design in the form of randomness and intermittency of available energy, as well as additional system issues such as energy storage capacity and processing complexity. Additionally, the deployment of EH wireless networks calls for novel techniques for resource and interference management, cooperation among EH nodes, as well as cross-layer optimization of the network. The research focuses on a new set of challenges brought about by wireless networks composed of EH nodes. The research directions are divided into four major thrusts. (1) The first challenge is to understand the fundamental limit of EH communications in the information theoretic setting, accounting for random and intermittent supply of available energy, finite battery capacity with storage and withdrawal efficiencies. The special cases for low-power and high-power regimes are of particular interest. (2) In order to make efficient use of the available resources, joint energy scheduling and spectral and/or spatial resource allocation in EH networks exploiting the inherent structure of the resource allocation problems becomes an important problem. (3) Different EH nodes in the network can share their harvested energy either through the presence of power line between them, or through wireless charging. The research studies previous thrusts with energy and data cooperation. (4) The research investigatesefficient distributed cross-layer solutions to maximize the total system utility subject to data and energy queuing stability constraints.