This technology is a physical layer security cooperative transmission system that collects location information of a receiving node and surrounding cooperative nodes, determines a transmission encryption rate based on the transmission distance to the receiving node and the number of nodes participating in cooperative transmission, and transmits the encryption rate and data to the selected cooperative nodes for cooperative transmission to the receiving node.
Wireless relay communication has been vulnerable to security threats because the open nature of radio waves allows anyone to intercept signals. To address this, methods were proposed where some relays send intentional jamming signals to interfere with the decryption of eavesdropping devices; however, these jamming signals also reduced the data decryption probability for legitimate receivers.
This technology selects cooperative nodes in order of proximity and calculates encryption rates across four segments—divided at the 1/4, 1/2, and 3/4 points of the total node count—adopting the highest value as the transmission encryption rate. It lowers the decryption probability for eavesdropping nodes without the need for jamming signals, while maintaining transmission efficiency for legitimate receivers. It can be applied to mobile relay networks, military tactical communications, and wireless ad-hoc/sensor networks, helping to secure both coverage in dead zones and communication confidentiality without the need for additional base stations.
This invention was developed with support from the Ministry of Education's research on energy hotspots based on 3D beamforming technology for wireless power transmission.
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