PHY Layer Security Using Secured OCC Indices in MU-MIMO
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Solution Overview
Problem
Wireless communication systems face challenges in securing physical layer communications, particularly in multiple-user multiple-input multiple-output (MU-MIMO) environments, where devices can eavesdrop on and decode unintended data.
Innovation Solution
Implementing orthogonal cover codes (OCC) to encode communications between a base station (BS) and user equipment (UE), where the BS configures the UE with OCC matrices and indices secured by a secret key, preventing unauthorized devices from determining the channel or intended UE in MU-MIMO scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If orthogonal cover codes (OCC) are used to encode communications between BS and UE, then PHY layer security is enhanced and unauthorized devices cannot decode communications, but device complexity increases due to the need for secure index generation and transmission
Solution Approach 1:
The base station pre-generates secure indices by applying a secret key to the OCC index before transmission. This preliminary security transformation ensures that even if the OCC index is intercepted, the actual encoding information remains secure, resolving the contradiction between security enhancement and complexity management
Solution Approach 2:
A secret key acts as an intermediary element between the OCC index and the actual communication encoding. The secret key transforms the simple OCC index into a secure index, enabling security without requiring complex direct encoding mechanisms, thus improving security while managing complexity
2Reliability
If secure indices and secret keys are transmitted to the UE, then communication security is improved, but loss of information increases if transmission fails or is intercepted
Solution Approach 1:
The patent extracts the security function from the physical layer transmission and places it in the control layer. By generating secure indices at the base station and transmitting them through established control channels, the system separates security operations from data transmission, reducing the risk of information loss during transmission
Solution Approach 2:
The system prepares secure indices in advance at the base station before actual communication begins. This pre-generation and pre-transmission of security parameters ensures that security information is established before any potential interception or transmission failure, cushioning against information loss
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for securing physical (PHY) layers in wireless communication. Certain aspects are directed to a method for wireless communication by a base station (BS). In some examples, includes, by, a secured first index based at least in part on a first index and a first secret key, the first index corresponding to a first orthogonal cover code (OCC) for communication over at least a first channel between the BS and a user equipment (UE). In some examples, the method also includes transmitting, to the UE, the secured first index and the first secret key.