关键词: 输电线路监测, 无线传感器网络, 网络编码, 机会路由

Abstract: According to the high demand of real-time and reliability on monitoring power transmission lines, this paper proposes a transmission protocol based on network coding. This protocol makes full use of channel broadcast characteristics and cooperative communication between nodes. It combines the advantages of opportunistic routing and network coding, and applies the classical butterfly structure of network coding into the WSN long-chain topology of transmission line. In the case where the specific receiving state of the packet is not determined, the protocol takes the active network protection mechanism and selects the linear coding packet to transmit as the redundant packet until the node decodes the source packet. Performance analysis and simulation results show that the proposed protocol improves the reliability of data transmission and system throughput, reduces the network transmission delay. And the improved the network performance are obtained.

Key words: power line monitoring, Wireless Sensor Network（WSN）, network coding, opportunistic routing