摘要
为了解决无线能量收集网络中节点能量的不确定性使系统难以设计合理的传输策略的问题,构建源节点电池容量受限的菱形信道,以最大化系统端到端的吞吐量为目标,在满足传输节点间能量和数据因果及电池能量无溢出约束的条件下,构建系统中端到端吞吐量最大化的模型,提出一种最优的离线传输功率和速率分配策略。该策略首先根据理论分析和公式推导,将最优传输问题转化为求解广播信道侧的最优传输问题,利用注水算法求解源节点到中继节点的最优总功率。然后根据广播信道吞吐量最大化问题中的截止功率水平,分析源节点到各中继节点的吞吐量,根据中继节点数据到达情况,采用迭代注水法求解中继节点到目的节点最优传输功率,并通过扩展多址接入信道最优速率满足条件求解最优速率。仿真结果证明了所提优化策略的可行性和正确性。
In order to solve the problem that the energy harvesting uncertainty of node in wireless energy harvesting network makes it difficult for the system to design a reasonable transmission strategy,a diamond channel with limited battery capacity of the source node were constructed.The goal was to maximize the end-to-end throughput of the system.Under the conditions of meeting the constraints of energy and data causality between transmission nodes and no battery energy overflow,a model to maximize the end-to-end throughput of the system was built,and an optimal offline transmission power and rate allocation strategy was proposed.Firstly,based on theoretical analysis and formula derivation,the strategy transformed the optimal transmission problem into the optimal transmission problem on the side of the broadcast channel,and used the water-filling algorithm to solve the optimal total power from the source node to the relay node.Then,the throughput of the source node to each relay node was analyzed based on the cutoff power level in the broadcast channel throughput maximization problem.Finally,according to the data arrival of the relay node,the iterative water-filling method was used to solve the optimal transmission power from the relay node to the destination node,and the optimal rate was solved by extending the optimal rate of the multiple access channel.Simulation results demonstrate the feasibility and correctness of the proposed optimization policies.
作者
李陶深
孙莉
王哲
LI Taoshen;SUN Li;WANG Zhe(School of Computer and Electronic Information,Guangxi University,Nanning 530004,China;School of Information Engineering,Nanning University,Nanning 530299,China;School of Artificial Intelligent,Guangxi University for Nationalities,Nanning 530005,China)
出处
《通信学报》
EI
CSCD
北大核心
2021年第6期158-170,共13页
Journal on Communications
基金
国家自然科学基金资助项目(No.61762010)。
关键词
能量收集
菱形信道
电池容量受限
最优功率分配
最大吞吐量
energy harvesting
diamond channel
limited battery capacity
optimal power allocation
maximum throughput
作者简介
李陶深(1957-),男,广西南宁人,博士,广西大学教授、博士生导师,主要研究方向为无线网络、云计算与大数据、网络与信息安全等;通信作者:孙莉(1992-),女,河南商丘人,广西大学硕士生,主要研究方向为能量收集无线网络。sunli285@jd.com;王哲(1991-),男,河南南洋人,博士,广西民族大学讲师,主要研究方向为能量收集无线网络、边缘计算。
