电讯技术2025，Vol.65Issue(5)：767-776,10.DOI:10.20079/j.issn.1001-893x.240927002
支持能量收集与缓存的高铁通信系统
A High-speed Rail Communication System with Energy Harvesting and Caching
摘要
Abstract
To address the inherent challenges in high-speed railway communication systems,such as frequent link handovers and remote base station locations,which result in degraded perceived quality and high operational costs,a high-speed railway communication system architecture integrating energy harvesting and edge caching is proposed.To achieve the goal of optimize system energy consumption while guaranteeing user communication quality,a profit function combining system information service volume and system grid energy consumption is constructed,constrained by communication,caching,and energy resources.The Lagrange multiplier method is employed to derive the simultaneous wireless information and power transfer(SWIPT)time allocation and base station transmission power allocation schemes.Based on the Karush-Kuhn-Tucker(KKT)conditions,the relationship between the amount of base station cache data and the optimal time allocation scheme is derived,and the revenue function is simplified into an optimization problem solely related to the base station caching strategy.The simulation results show that the proposed caching strategy based on greedy algorithm can effectively improve the quality of system communication services and reduce energy consumption.Under different skewness factors,the value of the objective function is on average at least 5％higher compared with that of existing probabilistic caching strategies,while the energy consumption of the system's electrical grid can be reduced by about 3％.关键词
高铁通信/无线携能传输(SWIPT)/能量收集/边缘缓存Key words
high-speed rail communication/simultaneous wireless information and power transfer(SWIPT)/energy harvesting/edge caching分类
信息技术与安全科学引用本文复制引用
邵轲,吴松洋,齐力,孙磊,许炜阳..支持能量收集与缓存的高铁通信系统[J].电讯技术,2025,65(5):767-776,10.基金项目
2024年度重庆市自然科学基金创新发展联合基金(中国星网)(2024NSCQ-LZX0217) （中国星网）
