Study on topology reconstruction and data transmission of mine emergency communication network

In order to realize wireless network covered and emergency communication in the underground mine disaster,a study was conducted on the topology recons truction and data transmission problems in the emergency network,emergency network reconstruction plan was provided based on Wi- Fi Direct and the emergency data flo W was divided into uplink data flow,internal network data flow and downlink data flow. According to the uplink data flow, based on a time delay,a sub- mechanism of the servi ce zone was provided and the serious damaged terminal before the collection capacity of the information lost could send the perception information to safety terminal. Due to the adjacent miners in difficulty generally needed the same rescue information,according to the internal network and downlink data flow,an energy saving plan was provi ded based on wireless multicast and the rescue and support time of the network was expanded. The emergency network and available monitoring and control network shou Id have the functional complementation and protocol compatibility in order to provide higher safety protection to the operation in the underground mine.