A Physical Layer Security Transmission Method for Secrecy of Relay and Interference Node Selection Results

Abstract

A physical layer security transmission method that keeps the selection results of relay and interference nodes secret, and establishes a wireless transmission network with eavesdropping nodes, including a source node S, a destination node D, M intermediate nodes T1, T2,..., TM, and K There are eavesdropping nodes E1, E2,..., EK, the whole transmission process includes two stages: in the first stage, the source node broadcasts the information s, and believes that all intermediate nodes can successfully decode it in this stage; in the second stage, the selected intermediate nodes The relay node uses the decoding and forwarding protocol to forward information to the destination node, and the interference node transmits interference information to the eavesdropping node. The relay and interference node selection results of the present invention are close to the security outage probability performance of the optimal selection result obtained by the exhaustive method, and have higher security outage probability performance; the present invention only needs Obtaining statistical channel state information of eavesdropping users has high practicability; the selection results of relay and interference nodes are kept secret from eavesdropping nodes, ensuring the security of confidential signal transmission.

Description

technical field [0001] The invention belongs to the communication field and relates to a physical layer security transmission method, in particular to a physical layer security transmission method for keeping the selection result of relay and interference nodes secret. Background technique [0002] With the wide application of contemporary wireless communication technology in daily life, more and more attention has been paid to the security and privacy of wireless transmission. Ensuring the security and privacy of wireless transmission has become a very important research topic. In traditional networks, security is guaranteed through the encryption mechanism at the upper layer of the network. However, signal encryption requires the generation and interaction of secret keys, which will bring additional complexity and signaling overhead to the system. Physical layer security technology ensures the security and privacy of information transmission by making use of the physical ...

AI Technical Summary

Problems solved by technology

In addition, although the existing relay or interference node selection methods can usually obtain relatively good system performance, the confidentiality of the selection process and results is not considered enough

If there are multiple eavesdropping users in the network, and they intercept the selection result of the relay or interference node, they can cooperate with each other, use cooperative beamforming and other means to eliminate or reduce interference, and extract useful signals, thereby leading to a sharp deterioration in network security performance

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