非平稳信道下工业数采网络数据传输时隙分配

Time slot allocation of data transmission in industrial data acquisition networks over non-stationary channels

非平稳信道条件下,信道参数随时间波动,难以预测,加大了分配难度。为确保关键数据在复杂多变的工业数采网络环境中能够稳定传输,提出非平稳信道下工业数采网络数据传输时隙分配方法。建立非平稳信道下节点冲突函数,估算非平稳信道下工业数采网络能耗,加快传输时隙分配效率;在非平稳信道下,以能耗最小为目标,结合超帧循环拼接技术,为全部节点动态分配传输时隙。实验证明,所提方法在距离比超过0.45(非平稳信道)和0.50(平稳信道)时,数据传输速率呈下降趋势,非平稳信道下速率降幅更大;节点5的传输时隙需求最大,且整体网络在空闲时隙提升后,各区域时隙抖动值从最高约490降至稳定水平,显著提高了数据传输的稳定性和效率。

Under non-stationary channel conditions,channel parameters fluctuate over time and are difficult to predict,increasing the difficulty of allocation.To ensure stable transmission of critical data in the complex and ever-changing industrial data acquisition network environment,a time slot allocation method for industrial data acquisition network data transmission over non-stationary channels is proposed.Establish a node conflict function under non-stationary channels,estimate the energy consumption of industrial data acquisition networks under non-stationary channels,and accelerate the efficiency of transmission time slot allocation;In non-stationary channels,with the goal of minimizing energy cons-umption,combined with superframe cyclic concatenation technology,dynamically allocate transmission time slots for all nodes.Experimental results have shown that the proposed method exhibits a decreasing trend in data transmission rate when the distance ratio exceeds 0.45(non-stationary channel)and 0.50(stationary channel),with a greater decrease in rate under non-stationary channels.Node 5 has the highest demand for transmission time slots,and after the overall network increases its idle time slots,the jitter values of time slots in each region decrease from a maximum of about 490 to a stable level,significantly enhancing the stability and efficiency of data transmission.