远程实时控制系统EPON动态分配研究

Study on Long-Distance Real-Time Control System With Dynamic Bandwidth Allocation of EPON

以太无源光网络(EPON)结合了以太网技术和无源光网络技术的优势,能够以较低的价格实现高速接入。随着远程分布控制系统实时性要求的不断提高,将EPON引入到控制系统中,是一种理想的选择。首先简要介绍了整个远程控制系统拓扑结构,然后根据该系统的特点,提出了一种改进的上行动态带宽分配算法,结合了轮询机制和实时性优先级。通过建模仿真,验证了该算法可以取得较高的实时性和带宽利用率。

Etherent passive optical network（EPON） has combined the advantages of Ethernet and passive optical technology. High speed accessing at lower price has been realized in this way. Higher real-time requirements in the long-range distributed the control system is put at present. It is a better choice to introduce EPON in the control system. The topological structure of the whole system at first is introduced briefly. Then, based on the characteristic of the control system, a modified dynamic bandwidth allocation algorithm, which integrates polling scheme and real-time priority, is proposed. Simulation results show that good real-time property and high bandwidth utilization are realized with this algorithm.