Uplink secure transmission method based on downlink auxiliary feedback in 5G communication system

A technology for secure transmission and communication system, which is applied in the field of uplink secure transmission based on downlink feedback assistance in 5G communication systems, and can solve the problems that wireless physical layer secure transmission technology cannot be directly applied to 5G uplink communication systems, security performance gains, etc.

Active Publication Date: 2015-10-28
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to propose an uplink secure transmission method based on downlink feedback assistance in a 5G communication system for a 5G uplink single-input multiple-output (SIMO) wireless communication system in time-division duplex mode to solve the problem of existing wireless physical layer security The transmission technology cannot be directly applied to the 5G uplink communication system, or it can only bring limited security performance gains

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  • Uplink secure transmission method based on downlink auxiliary feedback in 5G communication system
  • Uplink secure transmission method based on downlink auxiliary feedback in 5G communication system
  • Uplink secure transmission method based on downlink auxiliary feedback in 5G communication system

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Embodiment Construction

[0033] The following is attached figure 1 The illustrated embodiment describes in detail the specific implementation of the design scheme of the present invention.

[0034] An uplink secure transmission method based on downlink feedback assistance in a 5G communication system of the present invention comprises the following steps:

[0035] Step 1, before the two-phase transmission is started, the single-antenna user node Alice (single-antenna user A in the figure) first sends a message containing the feedback signal transmission request information and pilot sequence information to the base station node Bob (the M-antenna base station B in the figure) Mixed messages. The base station node Bob uses the pre-shared pilot sequence information and the received mixed information to estimate the M-dimensional column vector channel information from Alice to Bob, and prepares for the transmission of feedback information;

[0036] Step 2, after completing the estimation of the main ch...

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Abstract

The invention discloses an uplink secure transmission method based on downlink auxiliary feedback in a 5G communication system. In the first stage, a multi-antenna base station end sends both artificial interference and artificial noise signals on a downlink by means of a wave beam formation technology; and a single-antenna user end receives an emission signal from the base station end, and scrambles the received signal to a to-be-sent secret signal so that a mixed emission signal is formed. In the second stage, the user terminal broadcasts the mixed emission signal; and the base station end receives the mixed emission signal. Since the base station end already knows an artificial interference signal emitted by the base station itself, an expected secret signal can be separated from the received signal. A single-antenna passive eavesdropping end receives mixed signals during both transmission stages, and cannot know any prior information about the artificial interference and artificial noise signals, so the possibility of stealing secret information is low. Therefore, the transmission security of a 5G uplink single-input and multi-output system is effectively guaranteed.

Description

technical field [0001] The present invention relates to a secure transmission method of a wireless communication system, in particular to a secure transmission method for a 5G uplink single-input multiple-output (SIMO) wireless communication system in a time-division duplex mode. Background technique [0002] While wireless communication technology brings convenience to people's daily production and life, it inevitably brings the problem of easy theft of communication content to both parties due to the unbounded nature of physical transmission. With the deepening of the development and popularization of wireless communication technology, the security of communication has been paid more and more attention. What means to use to effectively prevent information leakage and ensure the safe transmission of information will become a long-term focus research topic. [0003] As one of the most promising key technologies in 5G wireless communication, Massive Multiple-Input Multiple-O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02
CPCH04W12/02
Inventor 王文杰刘超文邓浩吴飞龙杨斌
Owner XI AN JIAOTONG UNIV
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