基于非授权频谱D2D的无信号区在线监测数据传输技术

Online Monitoring Data Transmission Technology in No-signal Area Based on Unauthorized Spectrum D2D

在线监测技术可以实现对架空输电线路本体、通道环境、气象条件、风偏舞动等的实时监测,有效保障了架空输电线路安全稳定运行水平,但是部分杆塔处于无运营商基站覆盖区域,无法实现在线监测数据回传。为此,提出了一种基于非授权频谱终端直接通信技术(Device to Device,D2D)的无信号区在线监测数据传输方法。首先,分析架空输电线路在线监测装置分布特点,选择适用于输电线路环境的频谱资源,建立装置间直接通信的路损模型;然后,采用基于先听后发的信道接入机制,实现与已有通信技术的友好共存;最后,结合无信号区输电线路信道环境,采用基于定向天线的传输路由进行信息中继。对本技术的仿真验证结果显示本方法可以在降低天线的传输功率、提高整个监测网络的生存时间和稳定工作时间基础上,保障在线监测数据高速率可靠回传。

Online monitoring technology can realize real-time monitoring of overhead transmission lines,channel environment,meteorological conditions,wind deviation and galloping,which effectively ensure the safe and stable operation of overhead transmission lines. However,some towers are in the area covered by no operator base station,so online monitoring cannot be realized. An online monitoring data transmission method in no-signal area based on unauthorized spectrum terminal direct communication technology(D2D)was proposed.Firstly,the distribution characteristics of online monitoring devices for overhead transmission lines were analyzed,the spectrum resources suitable for transmission line environment were selected,and a path loss model of direct communication between devices was established.Then,the channel access mechanism based on listening before sending was adopted to realize the friendly coexistence with existing communication technologies. Finally,based on the transmission line channel environment in the no-signal area,the transmission route based on directional antenna was used for information relay. The simulation results show that the proposed method can reduce the transmission power of the antenna,improve the survival time and stable working time of the whole monitoring network,and ensure the high-speed and reliable return of online monitoring data.