摘要
目前无线供能网络的研究主要考虑仅有单个射频能量源和单个汇聚节点的能量供给与数据收集。研究由多个射频能量源和汇聚节点组成的无线供能网络,每个节点有吞吐量需求,通过最优化各能量源的能量发送时长来使得总供能最小化。具体来说,对该供能最小化问题进行建模,并将其分解成主、从两个问题:从问题为能量供给阶段时长给定时满足节点吞吐量需求的各能量源供能时长最优化(即总供能最小化);主问题为最优化能量供给阶段时长。将从问题建模并设计分布式对偶次梯度法获得最优取值;主问题的求解先采用二分法找到满足节点吞吐量要求的一个可行解,然后使用黄金分割法高效地得到最优解。仿真结果表明:相比于基准方法,所提出的最优算法能显著降低能量源的能量发送。
At present,the research of wireless powered communication networks(WPCNs)mainly considers the energy provision and data collection of the scenarios with a single RF energy source and a single Sink.The WPCN composed of multiple RF energy sources and Sinks is studied.Ensuring that each node’s throughput demand is satisfied,the total energy provision is minimized by optimizing the energy transmission time of each energy source.Specifically,the energy provision minimization problem was modeled and decomposed into a master problem and a subproblem.The subproblem is that for a given duration of energy transmission phase,the energy supply duration of each energy source is optimized while satisfying the throughput demand of the node(i.e.,the minimization of total energy provision);the master problem is to optimize the duration of energy transmission phase.The subproblem is modeled as a convex optimization problem and the optimal solution is obtained by dual gradient method.For the master problem,first use the bisection search method to find a feasible solution,and then use the golden section method to get the optimal solution efficiently.Simulation results show that compared with the benchmark method,the proposed algorithm can significantly reduce the total energy provision of the energy source.
作者
葛海江
池凯凯
毛科技
邵奇可
GE Haijiang;CHI Kaikai;MAO Keji;SHAO Qike(School of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China;Institute of Information Engineering,Hangzhou Vocational&Technical College,Hangzhou 310018,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2019年第9期1381-1387,共7页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(61872322)
浙江省基础公益研究计划项目(LGG18F020005,LGG18F020018,LY18F020029)
浙江省教育厅科研项目(Y201942959)
关键词
无线供能网络
供能最小化
对偶次梯度法
黄金分割法
wireless powered communication networks
energy provision minimization
dual subgradient method
golden section method
