(When the wireless sensor network introduces mobile nodes, the function of the network will be greatly expanded. The EAR algorithm is based on the MAC layer, that is, the process of terminating the mobile node from entering the network, to maintaining the network connection, and finally leaving the network; first, the network layer MIR protocol is proposed, which is based on the multi-hop routing termination of the sensor network. Receiver and mobile section.4 data packet transmission.)