Component Carrier Switching for Physical Layer Security
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in enhancing security and efficiency due to the lack of effective methods for secure communication between base stations and user equipment (UE) over component carriers (CCs, making them vulnerable to eavesdropping.
Innovation Solution
The method involves configuring secure uplink and downlink reference signals for each CC, allowing the base station and UE to select a subset of CCs based on measurements and apply a metric or mapping function to enhance physical layer security by switching CCs based on acknowledgement (ACK) and negative acknowledgement (NACK) patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If component carriers are used for wireless communication, then communication capacity and data rate are improved, but security against eavesdropping deteriorates
Solution Approach 1:
The patent implements dynamic component carrier switching where the base station and UE randomly select from multiple configured CCs based on measurement results and switching indicators. This dynamic selection changes the active communication CC over time, making it difficult for eavesdroppers to continuously intercept communications on a fixed frequency, thus resolving the security issue while maintaining high communication capacity through multiple CCs
Solution Approach 2:
The base station pre-configures multiple component carriers and measurement configurations (including reference signals) before actual communication begins. The UE performs measurements on these pre-configured CCs and reports results in advance, allowing the base station to pre-determine switching patterns and select secure CCs before data transmission starts, enhancing security proactively
2Productivity
If multiple component carriers are configured for communication, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent divides the component carrier management into distinct functional segments: measurement configuration (base station only), measurement execution (UE), reporting (UE to base station), and switching control (base station). This segmentation allows complex multi-CC operations to be broken down into manageable, standardized steps, reducing implementation complexity while maintaining communication efficiency
Solution Approach 2:
The patent implements a feedback loop where the UE measures channel conditions on configured CCs, reports measurement results to the base station, and the base station uses this feedback to determine optimal CC switching. This feedback mechanism enables efficient, adaptive CC selection without requiring the UE to independently manage complex switching logic, thereby maintaining system efficiency while controlling complexity
Data Source
AI summary
The base station may transmit, to a UE, a configuration of a set of secure RSs for each CC of a set of CCs and at least one RE, and instruct the UE to select a subset of CCs from a set of CCs. The base station and the UE may measure the set of secure RS across the at least one RE, and select the subset of CCs from the set of CCs based on the measurement. The base station and the UE may communicate with each other on the subset of CCs. The base station and the UE may communicate with each other on a first CC of the subset of CCs, and switch the CC from the first CC to a second CC of the subset of CCs to communicate with each other, based on a number of ACKs/NACKs transmitted or a pattern.