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A Cooperative Communication Method for Stable Physical Layer Security

A collaborative communication and physical layer technology, applied in wireless communication, electrical components, transmission systems, etc., to ensure stability and good results

Inactive Publication Date: 2016-08-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current research on the security of communication networks is mainly above the network layer, and the method for the source node to select a reliable relay node to achieve stable physical layer security transmission has not been reported yet.

Method used

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  • A Cooperative Communication Method for Stable Physical Layer Security
  • A Cooperative Communication Method for Stable Physical Layer Security
  • A Cooperative Communication Method for Stable Physical Layer Security

Examples

Experimental program
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Embodiment 1

[0046] The following is a concrete example to verify the feasibility of this method, see the following description for details:

[0047] see figure 1 , the unreliable relay node cooperation model includes: source node S, relay node R and destination node D. The transmission process is divided into two time slots. The first time slot: the source node transmits the signal to the relay node and the destination node through the broadcast channel; the second time slot: the relay node cooperatively forwards the received signal to the destination node.

[0048] see figure 2 , S is the source node, N is natural, the behavior that the relay node can choose is divided into two types, the left branch indicates that the relay behavior has the randomness of non-cooperation, where B=0 means that it is possible to choose a non-cooperative behavior, and B=β means It is possible to choose cooperative behavior; the right branch indicates that the relay node chooses stable cooperative behavi...

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Abstract

The invention discloses a cooperative communication method for stabilizing the safety of physical layers. The method includes enabling source nodes i to determine behavior strategies of relay nodes j according to gain values of the relay nodes j after each game playing stage is completed; enabling the source nodes to update credibility of the relay nodes according to the behavior strategies and historical credibility of the relay nodes j; updating the credibility of the relay nodes again according to false positive rates and false negative rates when the relay nodes cooperate or do not cooperate; selecting reliable relay nodes according to the re-updated credibility of the relay nodes when the source nodes i need to transmit signals in next stages; reducing the credibility of the relay nodes if the relay nodes select non-cooperation behavior; increasing the credibility of the relay nodes if the relay nodes select cooperation behavior. The cooperative communication method has the advantages that the behavior of the relay nodes is monitored, so that the reliable nodes can be effectively assuredly selected by the source nodes, non-operation behavior of the relay nodes can be effectively assuredly restrained, and the stability of the safety of the wireless transmission physical layers can be guaranteed.

Description

technical field [0001] The invention relates to the field of wireless communication physical layers. Based on the incomplete information dynamic Bayesian game, the invention proposes a cooperative communication method for realizing stable wireless communication physical layer security. Background technique [0002] The broadcast characteristics of wireless transmission make nodes in the network vulnerable to attacks and eavesdropping by malicious nodes. When satisfying the main channel condition is better than the eavesdropping channel condition, there is a physical layer security that prevents eavesdroppers from obtaining useful information. Because the channel constraints are not easy to meet in the actual wireless environment, the application of this technology is limited. Cooperative communication can break through the constraints of channel conditions by using the forwarding of cooperative nodes, and become a practically applicable physical layer security technology. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/04H04L29/06
Inventor 付晓梅厚丽君林松禹霖
Owner TIANJIN UNIV
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