A method for enhancing the reciprocity of physical layer information

A technology of physical layer information and reciprocity, applied in the field of enhancement of physical layer information reciprocity, can solve the problems of slow channel state change, decrease of key generation rate and key agreement rate, decrease of initial bit string matching rate, etc. Achieve the effect of reducing the influence of channel reciprocity, improving the accuracy and generation rate, and saving channel and system resources
CN111565090BActive Publication Date: 2021-06-11NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2021-06-11

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Abstract

The invention provides a method for enhancing the reciprocity of physical layer information. First of all, modify the communication protocol of the two parties so that it can quickly build and return the detection frame at the link layer, which reduces the time difference between the two parties measuring the channel, thereby reducing the channel change during this period of time, and improving the extraction efficiency of the two parties. The reciprocity of the channel characteristics obtained; then, according to the variance of the extracted channel characteristics, dynamically adjust the sending rate of the detection packet, which reduces the channel and system overhead, and enhances the reciprocity of the communication parties; then, screens out the dynamic The channel characteristics measured in the area; finally, the channel characteristics with enhanced reciprocity can be obtained by denoising the selected channel characteristics.
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Description

technical field

[0001] The invention belongs to the technical field of communication security, and in particular relates to a method for enhancing the reciprocity of physical layer information. Background technique

[0002] With the simultaneous development of technology and society, wireless communication has become the main way for people to interact. However, the traditional encryption system is no longer applicable in wireless communication. In order to solve the problems of difficult key distribution and long update period, a key generation technology based on physical layer information has been developed. How to increase the key generation rate and ensure the high randomness of the key is the key problem to be solved by the key generation technology of the physical layer, and the main way to solve these problems is to ensure that the communication parties measure the channel characteristics with high correlation. However, in the process of channel feature extraction, ...

Claims

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