Multi-Hop Transmissions System Based on Opportunistic Scheduling Schemes and WPT to Improve Physical Layer Security in Wireless Sensor Networks

摘要

The present invention relates to a multi-hop system based on opportunistic scheduling and wireless power transmission to improve physical layer security in a wireless sensor network. A multi-hop system based on opportunistic scheduling and wireless power transmission according to the present invention includes a plurality of (M) power beacons (PB) that supply energy for data transmission in a wireless sensor network, and energy from the power beacons. In a multi-hop system provided with nodes existing in the form of a cluster that receives and transmits data, the power beacon supplies energy to each node, and each node performs energy harvesting (EH); During a data transmission period in which each node transmits data using the energy stored through the energy harvesting, the power beacon generates and propagates human noise to the nodes in order to interfere with the eavesdropper's eavesdropping behavior; and selecting a data transmission/reception node according to the channel state of each node through an opportunistic scheduling technique in each cluster.