With the rapid growth of time-critical applications in smart grid, robotics, autonomous vehicles, and industrial automation, demand for high reliability, low latency and strictly bounded jitter is sharply increasing. High-precision time synchronization communications, such as Time Triggered Ethernet (TTE), have been successfully developed for wired networks. However, the high cost of deploying additional equipment and extra wiring limits the scalability of these networks. Therefore, in this paper, a hybrid wired/wireless high-precision time synchronization network based on a combination of high-speed TTE and 5G Ultra-Reliable and Low-Latency Communications (URLLC) is proposed. The main motivation is to comply with the low latency, low jitter, and high reliability requirements of time critical applications, such as smart grid synchrophasor communications. Therefore, in the proposed hybrid network architecture, a high-speed TTE is considered as the main bus (i.e., backbone network), whereas a Precision Time Protocol (PTP) aided 5G-URLLC-based wireless access is used as a sub-network. The main challenge is to achieve interoperability between the PTP aided URLLC and the TTE, while ensuring high precision timing and synchronization. The simulation results demonstrate the impact of the PTP-aided URLLC in maintaining network reliability, latency, and jitter in full coordination with the TTE-network.
翻译:随着智能电网、机器人、自主车辆和工业自动化中时间紧迫应用的迅速增长,对高可靠性、低弹性和严格约束快感的需求正在急剧增加,为有线网络成功地开发了高精度时间同步通信,如时间触发以太网(TTE),然而,部署额外设备和额外电线的高昂成本限制了这些网络的可扩展性,因此,在本文件中,基于高速TTE和5G超高弹性和低弹性通信(URLLC)组合的混合有线/无线高精度高时间同步网络网络,主要动机是遵守低密度、低亮度和高可靠性的时间关键应用程序,如智能电网同步通信。因此,在拟议的混合网络结构中,高速TTE被视为主干线(即主干线网络),而精密时间协议(PTP)协助了5G-超弹性和低 LULC通信(URC)的无线通信。