Rogue Node Interference Management in Optical Camera Communication
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Solution Overview
Problem
Conventional Optical Camera Communication (OCC) networks are ill-equipped to manage interference caused by rogue transmission sources that are not registered with a coordinator, leading to disrupted communication and challenges in multi-access within the interference region.
Innovation Solution
An interference management system that includes a processor and memory to detect rogue transmission sources by identifying unregistered sources causing interference, and assigns distinct guard bands to serving transmission sources to mitigate noise and ensure data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coordination methods are used to manage multiple transmission sources, then communication reliability is improved for registered sources, but the system becomes vulnerable to rogue transmission sources that are not registered
Solution Approach 1:
The patent introduces a coordinator as an intermediary entity that manages multiple transmission sources. The coordinator assigns unique identification codes to legitimate transmission sources and enables the receiver to distinguish between registered and unregistered (rogue) sources. This intermediary structure allows the system to maintain reliability for authorized sources while gaining the ability to detect and handle rogue sources through the identification code verification mechanism.
2Manufacturing precision
If guard bands are assigned to transmission sources to reduce interference, then signal quality is improved, but the system cannot effectively differentiate between guard bands from legitimate and rogue sources
Solution Approach 1:
The patent segments the guard band structure by associating each guard band with a unique identification code assigned to specific transmission sources. Instead of using generic guard bands, the system divides the frequency spectrum into source-specific segments where each legitimate source has its own identified guard band. This segmentation enables the receiver to differentiate between guard bands from authorized sources versus those from rogue sources through code verification.
3Productivity
If the system accepts multiple transmission sources to increase network capacity, then productivity is improved, but interference management becomes more complex
Solution Approach 1:
The patent implements a feedback mechanism where transmission sources send their unique identification codes along with their signals to the receiver. The receiver uses these feedback codes to verify whether each transmission source is registered with the coordinator. This feedback approach allows the system to manage multiple sources efficiently by providing a simple verification method that reduces interference management complexity while maintaining high network capacity.
Data Source
AI summary
A method and system for identifying and mitigating interference caused by a rogue transmission source in an Optical Camera Communication (OCC) network is disclosed. The method includes receiving information from a plurality of transmission sources. Each of the plurality of transmission sources is within a capture area of a camera. Each of the plurality of transmission sources comprises a set of light sources configured to display one of a plurality of color codes. The method further includes detecting, through the camera, an interference between a serving transmission source associated with the camera and a non-serving transmission source. The serving transmission source belongs to the plurality of transmission sources. The method further includes establishing the non-serving transmission source as the rogue transmission source, when the non-serving transmission source is not registered with a master coordinator within the OCC network.