A full-duplex cooperative scrambling secure transmission method based on optimal user selection of a direct path

Abstract

The invention relates to a full-duplex cooperative scrambling secure transmission method based on optimal user selection of direct path. In the first time slot, the source node sends information to the relay node and the destination user node. At the same time, one user node with the largest signal-to-noise ratio is selected from all the destination user nodes as the legal user node, and the otherdestination user nodes are eavesdropping user nodes. The legal user node sends interference signals to the relay node and destination user node. In the second time slot, the relay node amplifies theinformation received in the first time slot by using the variable gain amplification and forwarding protocol, and forwards the information to the destination user node. The legitimate user continues to send the scrambling signal to the eavesdropping user node. The invention can reduce the receiving signal-to-noise ratio of the eavesdropping channel and ensure the safe transmission of the information.

Description

technical field

[0001] The invention relates to the field of wireless communication physical layer security, in particular to a full-duplex cooperative scrambling secure transmission method based on the optimal user selection of the direct path. Background technique

[0002] From the perspective of information theory, physical layer security makes full use of various propagation characteristics of wireless channels to solve information security problems in the communication process at the physical layer. Compared with key encryption, physical layer security has many advantages, such as no need for highly complex algorithms, clear security performance evaluation criteria, and so on. In terms of data security, physical layer security technology has received more and more attention as a supplement or replacement of key encryption technology. By processing information at the physical layer, the security of information can be fundamentally ensured. Therefore, research on physic...

Examples

Embodiment Construction

[0048] Such as figure 1 with figure 2 As shown, the present invention discloses a full-duplex cooperative scrambling secure transmission method based on the optimal user selection of the direct path, which is applied to a multi-user relay network, and the multi-user relay network includes a source node, a relay node and multiple destination user nodes (sinks), all nodes are single-antenna, and the relay node is a passive node, the destination user node adopts full-duplex working technology, and there is a direct path.

[0049] The entire secure transmission process of information is divided into two time slots. In the first time slot, the source node sends information to the relay node and the destination user node, and at the same time selects a user with the largest receiving signal-to-noise ratio from all destination user nodes. Nodes are legal user nodes, and eavesdropping user nodes are eavesdropping user nodes. Since the destination node is in full-duplex mode, the le...

technical field

[0001] The invention relates to the field of wireless communication physical layer security, in particular to a full-duplex cooperative scrambling secure transmission method based on the optimal user selection of the direct path. Background technique

[0002] From the perspective of information theory, physical layer security makes full use of various propagation characteristics of wireless channels to solve information security problems in the communication process at the physical layer. Compared with key encryption, physical layer security has many advantages, such as no need for highly complex algorithms, clear security performance evaluation criteria, and so on. In terms of data security, physical layer security technology has received more and more attention as a supplement or replacement of key encryption technology. By processing information at the physical layer, the security of information can be fundamentally ensured. Therefore, research on physic...

Examples

Embodiment Construction

[0048] Such as figure 1 with figure 2 As shown, the present invention discloses a full-duplex cooperative scrambling secure transmission method based on the optimal user selection of the direct path, which is applied to a multi-user relay network, and the multi-user relay network includes a source node, a relay node and multiple destination user nodes (sinks), all nodes are single-antenna, and the relay node is a passive node, the destination user node adopts full-duplex working technology, and there is a direct path.

[0049] The entire secure transmission process of information is divided into two time slots. In the first time slot, the source node sends information to the relay node and the destination user node, and at the same time selects a user with the largest receiving signal-to-noise ratio from all destination user nodes. Nodes are legal user nodes, and eavesdropping user nodes are eavesdropping user nodes. Since the destination node is in full-duplex mode, the le...

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