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A lawful interception method based on physical layer security in a multi-relay system

A technology for physical layer security and legal interception, applied in transmission systems, electrical components, etc., can solve problems such as difficulties in legal interception, and achieve the effect of increasing the achievable interception rate and improving interception performance.

Active Publication Date: 2021-05-11
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a multi-relay system, lawful interception becomes more difficult when the relay selection strategy is adopted for illegal links

Method used

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  • A lawful interception method based on physical layer security in a multi-relay system
  • A lawful interception method based on physical layer security in a multi-relay system
  • A lawful interception method based on physical layer security in a multi-relay system

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions of the embodiments of the present invention.

[0029] A legal interception method based on physical layer security in a multi-relay communication system disclosed by the present invention is implemented on the multi-relay communication system. The system includes a suspicious source node, a suspicious receiving node, and multiple cooperative The relay node and a listening node, in which the source node, the receiving node, and the relay node are all configured with a single antenna, while the listening node is configured with multiple antennas. The source node uses the relay selection strategy to select a relay node for cooperative transmission, and the listening node uses interference to change Selection of source nodes.

[0030] The legal interception method based on physical layer security under the multi-relay communication system includes the following content:

[0031] The first stage: the...

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Abstract

The invention discloses a legal monitoring method based on physical layer security in a multi-relay communication system. Calculate the relay nodes that can be eavesdropped and send interference information to the relay nodes to try to change the result of relay selection; the second stage: the selected relay node transmits information to the destination node, and the listening node tries to eavesdrop on information from the relay node. Considering the content-based monitoring strategy, the monitoring node selects the relay node according to the maximum achievable monitoring rate, so as to obtain the maximum monitoring rate. This method is also applicable to the event-based monitoring strategy based on changing the basis for the monitoring node to select the relay node, that is, the monitoring node selects the relay node according to the possibility of successful wiretapping, so as to ensure the success rate of monitoring.

Description

technical field [0001] The invention belongs to the application field of communication technology, and in particular relates to a legal interception method based on physical layer security in a multi-relay communication system. Background technique [0002] With the development of 5G and cognitive radio networks, wireless communication technology has ushered in a new round of opportunities and challenges. The open nature of wireless communication makes it more vulnerable to external intrusion and thus bury potential crisis. In recent years, physical layer security technology has received extensive attention from scholars. Physical layer security technology starts from the bottom layer of communication, which can effectively improve the security of communication system. At present, many studies assume that both sides of the wireless transmission are legal, so they are committed to protecting the legal transmitter from eavesdropping and attacking by external malicious or ill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L63/16H04L63/30
Inventor 张士兵胡英东李业高锐锋
Owner NANTONG UNIVERSITY
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