物联网学报 ›› 2020, Vol. 4 ›› Issue (4): 70-78.doi: 10.11959/j.issn.2096-3750.2020.00193

• 理论与技术 • 上一篇    下一篇

铁路物联网中无线携能中继网络性能分析

李亚平1,熊轲1,张煜2,杨玺3()   

  1. 1 北京交通大学计算机与信息技术学院,北京 100044
    2 国网能源研究院有限公司,北京 102209
    3 北京物资学院,北京 101149
  • 修回日期:2020-08-06 出版日期:2020-12-30 发布日期:2020-12-14
  • 作者简介:李亚平(1996- ),女,河南许昌人,北京交通大学计算机与信息技术学院硕士生,主要研究方向为无线传感器网络、能量收集等|熊轲(1981- ),男,陕西汉中人,博士,北京交通大学计算机与信息技术学院副院长、教授,计算机工程系主任,主要研究方向为无线协作网络、无线移动网络、网络信息理论等|张煜(1983- ),男,广西桂林人,博士,国网能源研究院有限公司高级工程师,主要研究方向为泛在电力物联网、无线协作网络、电能替代等|杨玺(1980- ),女,江西樟树人,博士,北京物资学院副教授,计算机技术与物联网工程系主任,主要研究方向为物联网技术、机器学习
  • 基金资助:
    中央高校基本科研业务费资助项目(2020JBZD010);国网能源研究院有限公司科技项目(SGNY202009014);北京市智能物流系统协同创新中心项目(BILSCIC-2019KF-07)

Performance analysis of simultaneous wireless information and power transfer relay network in railway Internet of things

Yaping LI1,Ke XIONG1,Yu ZHANG2,Xi YANG3()   

  1. 1 School of Computer and Information Technology,Beijing Jiaotong University,Beijing 100044,China
    2 State Grid Energy Research Institute Co.,Ltd.,Beijing 102209,China
    3 Beijing Wuzi University,Beijing 101149,China
  • Revised:2020-08-06 Online:2020-12-30 Published:2020-12-14
  • Supported by:
    The Fundamental Research Funds for the Central Universities(2020JBZD010);The Self-Developed Project of State Grid Energy Research Institute Co.,Ltd.(SGNY202009014);The Beijing Intelligent Logistics System Collaborative Innovation Center Project(BILSCIC-2019KF-07)

摘要:

面向铁路物联网场景研究了能量受限的两跳多中继网络的系统性能。源节点部署在列车上,向地面上能量受限的中继节点传输能量和信息,中继节点利用收集的能量向目的节点转发信息,中继节点采用半双工放大转发模式。在考虑中继电路具有能量激活门限的情况下,推导出在莱斯衰落信道下系统中断概率和吞吐量的闭合表达式。通过蒙特卡洛仿真验证了理论分析的正确性,对比分析了第一跳距离最短和两跳距离之和最短的两种中继选择策略下,莱斯因子、时间分割因子、源节点天线数量、源节点总发射功率、能量转化效率、各节点相对位置对系统端到端中断概率和吞吐量的影响。当列车先后经过各个中继时,系统的中断概率先减小后增大,吞吐量先增大后减小,并且选择两跳距离之和最短时的系统性能优于选择第一跳距离最短时的系统性能。

关键词: 能量收集, 中断概率, 莱斯衰落信道, 电路能量门限值, 中继选择, 放大转发

Abstract:

The system performance of energy constrained dual-hop multi relay network was studied in railway Internet of things.The source node was deployed on the train to transmit energy and information to the relay node with constrained energy on the ground.The harvested energy was used by the relay node to forward information to the destination node,and the relay node used half-duplex amplify-and-forward mode.Considering that the relay circuit has energy activation threshold,the closed-form expression of outage probability and throughput in Rician fading channel was derived.The correctness of the theoretical analysis was verified by Monte Carlo simulation,and the effects of Rician factor,time switching factor,the number of source node antennas,total transmission power of source node,energy conversion efficiency,relative position of each node on the end-to-end outage probability and throughput were compared and analyzed under the two relay selection strategies with the shortest first hop distance and the shortest sum of dual-hop distance.When the train passes through each relay successively,the outage probability of the system decreases first and then in creases,and the throughput increases first and then decreases.The performance of the system with the shortest sum of dual-hop distances is better than that with the shortest first hop distance.

Key words: energy harvesting, outage probability, Rician fading channel, circuit energy threshold, relay selection

中图分类号: 

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