Physical-Layer Integrity Protection for Cellular Signaling and Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless cellular networks lack security protection for signaling and data at protocol layers below the PDCP layer, leaving them vulnerable to attacks.
Innovation Solution
Implement physical layer integrity protection by using a payload of a physical channel, check codes, anti-replay parameters, and downlink control information as inputs for a security algorithm to enhance security between transmit and receive ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security protection is provided only at PDCP layer and above, then device complexity is reduced, but reliability is worsened due to vulnerability of lower layers
Solution Approach 1:
The patent segments security protection functions across multiple protocol layers: PDCP layer handles high-level signaling security, while physical layer handles data payload security through separate integrity protection mechanisms. This segmentation allows comprehensive security coverage without concentrating all security functions in one layer, thus managing complexity while improving reliability.
2Reliability
If integrity protection information is added to code block, then reliability is improved, but transmission bits increase
Solution Approach 1:
The patent merges integrity protection information with existing code block structures by utilizing available fields within the code block to carry integrity protection data. This merging approach allows integrity protection to be implemented without significantly increasing overall transmission bit requirements, as the protection information is integrated into the existing data structure rather than added as separate overhead.
3Measurement precision
If check code is used as input for security algorithm, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service error detection by using check codes that are automatically generated from the data payload itself. The check code serves dual purposes: it is both the input for security algorithm processing and the basis for error detection. This self-service mechanism improves measurement precision without requiring external or additional complex processing systems.
Data Source
AI summary
According to a communication method, at least one of all or a part of a payload of a physical channel, a check code, an anti-replay parameter, a key, and downlink control information may be used as an input of a security algorithm, and information used to perform integrity protection on the payload of the physical channel is obtained through calculation.