Power Allocation Energy Harvesting Relay Secure Communication Method Based on Optimal User Selection

Abstract

The invention relates to a power distribution energy acquisition relaying secure communication method based on optimal user selection. The secure transmission process of information is completed by two time slots. In the first time slot, an information source sends useful information to a relay, and a relay node uses the partial power of a received signal to energy acquisition and the reset power to receive the useful information sent by the information source. In the second time slot, the relay broadcasts a signal received in the first time slot to a sink. Energy acquired in the first time slot is fully used for information forwarding of the second time slot. In the method, the cooperative technology and time-division energy acquisition technology are reasonably combined to reduce the received signal-to-noise ratio of the eavesdropping channel, and the security performance of the network is improved, thus ensuring the secure transmission of the information. In the method, the half-duplex relay has the energy acquisition technology, and the received signal-to-noise ratio of the eavesdropping channel is reduced by the cooperation between the relay and the other nodes, so as to ensure the secure transmission of the system.

Description

technical field [0001] The present invention relates to the fields of wireless communication and physical layer security, and more specifically relates to a method for secure communication based on optimal user selection for power distribution, energy collection, and relaying. Background technique [0002] With the rapid development of network technology, the increasingly complex network structure makes the safe transmission of information more vulnerable to threats. Although methods such as high-level security protocols and encryption algorithms based on the key system can improve information security to a certain extent, they cannot overcome the adverse effects of the broadcast characteristics of wireless channels and rapidly increasing computing power on information security. Physical layer security technology ensures the security of information transmission directly from the physical layer by making full use of the complex spatial and time-varying characteristics of wire...

AI Technical Summary

Problems solved by technology

[0004] In recent years, the research on energy harvesting technology in wireless networks has received extensive attention. For relay networks that are not convenient for large-scale use of wired energy supply, such as sensor networks, the traditional method is to use battery power, but it will cause network maintenance in the later period. The cost is high, and the battery needs to be replaced or recharged regularly

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