Bidirectional Reference Signal Configuration for Physical Layer Security
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Solution Overview
Problem
Conventional communication systems are unable to meet security requirements for transmission as they only allow channel information to be determined in one transmission direction, hindering the implementation of physical layer security solutions.
Innovation Solution
A wireless communication method where a first device receives a first reference signal from a second device based on configuration information and sends a second reference signal to the second device, both signals being used to determine the same channel information, enabling bidirectional channel information sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional communication systems use unidirectional reference signals, then the system complexity is low, but the transmission security is insufficient
Solution Approach 1:
The patent merges the downlink and uplink reference signal configurations into a unified bidirectional reference signal mechanism. Both communication parties use the same configuration information to determine identical channel information, combining what were previously separate unidirectional processes into a single secure authentication framework
Solution Approach 2:
The patent introduces configuration information as an intermediary element that mediates between the two communication parties. This configuration information serves as a shared reference that enables both parties to independently determine the same channel information without directly exchanging sensitive channel data, thus enhancing security while maintaining manageable system complexity
2Loss of information
If bidirectional reference signals are implemented, then channel information can be shared for security, but the configuration management becomes more complex
Solution Approach 1:
The configuration information serves multiple functions simultaneously: it configures the reference signals, enables channel estimation, and provides the basis for secure authentication. This multi-functionality reduces the need for separate configuration mechanisms for each purpose, simplifying overall configuration management despite the bidirectional nature of the communication
Data Source
AI summary
A wireless communication method and a communications device are provided. The method includes: receiving, by a first device, a first reference signal from a second device based on configuration information of the first reference signal; and sending, by the first device, a second reference signal to the second device based on configuration information of the second reference signal, where the first reference signal and the second reference signal are respectively used to determine first channel information and second channel information, and the first channel information and the second channel information are the same. In the foregoing solution, the first device determines the first channel information based on the first reference signal, and the second device determines the second channel information based on the second reference signal.