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CSI spoofing prevention method in multi-user mimo uplink transmission

A multi-user and user technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve problems such as uplink MU-MIMO network paralysis, AP analysis results errors, etc., to ensure effectiveness and randomness Effect

Inactive Publication Date: 2019-01-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a malicious attacker among multiple users and feeds back fake CSI to the AP, the analysis result of the AP will be wrong, which will seriously cause the entire uplink MU-MIMO network to be paralyzed

Method used

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  • CSI spoofing prevention method in multi-user mimo uplink transmission
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  • CSI spoofing prevention method in multi-user mimo uplink transmission

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Embodiment Construction

[0041] The present invention will be further explained below in conjunction with specific embodiments and accompanying drawings.

[0042]The purpose of the present invention is to establish a security risk that is prone to occur and damage in the uplink MU-MIMO network in view of the potential safety hazards existing in the existing IEEE 802.11ac protocol standard, specifically referring to the vulnerability of channel state information (CSI). A strong attack model is proposed, which can prevent the verification algorithm of channel state information (CSI) generated by the attack.

[0043] see image 3 , firstly introduce the system model of MU-MIMO uplink network, there is one AP in the system, three users, namely Alice, Bob and Eve. The AP has three antennas, and each user has one antenna. The uplink CSI from the jth user to the ith antenna of the AP can be expressed as a frequency domain complex parameter h ij . Therefore, the overall CSI can be expressed as a 3×3 matri...

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Abstract

The invention discloses a method for preventing CSI spoofing in multi-user MIMO uplink transmission. The purpose is to effectively verify channel state information, prevent malicious attacks, and ensure normal communication in view of potential safety hazards existing in the existing IEEE 802.11ac protocol standard. The technical solution adopted is: before the parallel data transmission of multiple users on the uplink, the AP sends a predefined sequence to the users, and the normal users feed back the estimated channel state information, while the attacker forges the channel state information and feeds back, the AP The verification code is randomly generated, pre-encoded, and then transmitted to the user in a directional manner. Normal users can receive the verification code without interference, but the attacker forges his own channel state information CSI, but the attacker is not on the transmission path , therefore, the attacker cannot receive the verification code, and thus cannot feed back to the AP to complete the verification.

Description

technical field [0001] The invention belongs to the field of wireless communication network security, and in particular relates to a method for preventing CSI deception in multi-user MIMO uplink transmission. Background technique [0002] With the development of wireless communication technology, Wi-Fi protocol standards have gone through many versions, from IEEE802.11a, 802.11b, 802.11g, to 802.11n and 802.11ac, the most obvious change is the increase in data transmission rate. Among them, 802.11n is currently the most widely used protocol standard. The standard supports Single User Multiple Input Multiple Output (SU-MIMO) communications. The so-called MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving communication quality. It can make full use of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/32H04W12/06H04B7/0456H04B7/0452H04B7/06
CPCH04B7/0452H04B7/0456H04B7/0626H04L9/3271H04W12/06
Inventor 马蓉蔡远航惠维赵鲲韩劲松赵季中
Owner XI AN JIAOTONG UNIV