矿井EPON生存性与冗余可靠性研究

针对现有矿井通信网络在可靠性设计方面考虑不足、网络系统容灾能力较弱问题,分析了网络链路冗余度对矿井网络可靠性的影响,建立了矿井以太无源光网络(EPON)的网络生存性模型,并在此基础上提出了矿井EPON的树形、总线形和环形网络冗余结构,进而推导出上述结构的网络生存性计算方程。实验结果表明,矿井EPON的网络生存性与灾害强度、覆盖范围和网络结构有关,灾害强度和覆盖范围越大,网络生存性越小。在相同灾害强度和网络覆盖范围条件下,冗余结构网络的可靠性优于无冗余网络,双总线形冗余结构的生存性最高,双环形冗余结构的生存性次之,树形冗余结构的生存性最差。这对数字化矿井通信网络的可靠性预测和性能评估提供了理论依据。

Research on survivability and redundant reliability in the mine EPON

The existing mine networks do not have a high disaster recovery capability because most of them ignore reliability design,or critical fault caused by conventional mine communication networks.A survivability model for the mine EPON was built considering the effect of network link redundancy on mine network reliability,and the tree,bus and ring network redundant structures in the mine EPON was proposed based on the model.Thus,an algorithm to evaluate the survivability of above structures was derived.Several numerical experiments demonstrate that the survivability of the mine EPON is related to the disaster intensity,network coverage and structure,which becomes worse with the greater intensity of disaster and network coverage.On the condition of the same intensity of disaster and coverage area,the reliability of redundant structure is better than that of no-redundant structure.Also,at the same network coverage of the mine EPON,the survivability of the dual-bus structure is better than that of the dual-ring and tree-shaped redundant structure.The network survivability of dual-ring structure is better than that of the tree-shaped redundant structure.These conclusions can be used to forecast and evaluate the reliability of digital mine communication network.