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 reli- ability 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 grea- ter 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.