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A d2d covert communication system and communication method thereof for 5g cellular network physical layer security

A technology of physical layer security and covert communication, which is applied in the D2D covert communication system and its communication field, and can solve the problems that the average communication rate cannot be achieved

Active Publication Date: 2020-09-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the eavesdropper in the D2D cellular communication system knows the channel parameters and noise information of the eavesdropping link, the throughput of the covert signal of the D2D communication link is zero, that is, it is impossible to achieve an average communication rate greater than zero under the condition of concealment constraints.

Method used

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  • A d2d covert communication system and communication method thereof for 5g cellular network physical layer security
  • A d2d covert communication system and communication method thereof for 5g cellular network physical layer security
  • A d2d covert communication system and communication method thereof for 5g cellular network physical layer security

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Embodiment

[0058] Example: In order to verify the performance of the method proposed in the present invention, the following simulation experiments are performed:

[0059] Figure 8 , Picture 9 with Picture 10 The simulation environment is as follows: Unless otherwise specified, each communication link known to the eavesdropper Willie is a Rayleigh block fading channel, and the channel parameters all obey a complex Gaussian distribution with a mean value of 0 and a variance of 1. The noise of each communication link obeys complex Gaussian distribution, set N d =N w =N c .

[0060] Figure 8 Gives the cellular signal communication rate R b And maximum transmit power P bm Under different values, the error detection probability ξ changes with the detection threshold τ of the eavesdropper Willie. Set sender D at this time T Own peak power P max =30 dB, transmission power P of concealed signal c =0.1 dB, each noise power is 10 dB, and the non-concealed signal communication rate is R s = 1. It...

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Abstract

The invention discloses a D2D covert communication system and a communication method thereof for 5G cellular network physical layer security, including joint auxiliary covert communication model construction, covertness calculation and throughput calculation, and the joint auxiliary covert communication model will generally consider unfavorable interference chains With the joint assistance of BS cellular signal and D2D non-covert signal, the power of each sending end is dynamically allocated, and dynamically changing power is introduced at the detection end of the eavesdropper Willie, effectively improving concealment and throughput; In the concealment calculation, based on the detection threshold of whether the sending end of Pair m knows the eavesdropper Willie in D2D communication, the error detection probability and the minimum error detection probability are respectively used to measure the concealment of the system; in the throughput calculation, by adjusting the concealment signal The transmission power can obtain an average concealment rate greater than zero, that is, the throughput, and the interference cancellation of the Pair m receiving end in the D2D communication can effectively improve the throughput of the system.

Description

Technical field [0001] The present invention belongs to wireless communication technology, and in particular relates to a D2D covert communication system and a communication method for 5G cellular network physical layer security. Background technique [0002] D2D communication means that two terminal devices can directly transmit information without the relay assistance of a base station or an access point. When spectrum resources become more and more tight, D2D communication eases the data forwarding burden of base stations and improves spectrum utilization efficiency. Therefore, it has become one of the key technologies of 5G communication and has attracted more and more attention. In actual 5G cellular networks, most D2D end users are single-antenna, power-constrained devices. Due to the openness of wireless communication networks, they are extremely vulnerable to interference and eavesdropping. Traditional cryptographic security systems are difficult to overcome computationa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W72/04H04W12/00H04B1/7097H04L25/03H04W12/03
CPCH04B1/7097H04L25/03159H04W4/70H04W12/00H04W72/0473
Inventor 王良民蒋玉娥赵蕙刘怡良陈晓华宋香梅邬海琴
Owner JIANGSU UNIV