Concentric Segment Optical Transducer for Li-Fi Interference
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Solution Overview
Problem
In Li-Fi wireless optical communication systems, client devices often experience interference from multiple access points, leading to reduced data transfer speeds, coverage issues, high power consumption, uplink and downlink interference, and handover problems when moving between access points.
Innovation Solution
A client device with an upward-facing optical transducer featuring a coverage area with concentric segments, where the outermost segment's radius is optimized to cover multiple access points while minimizing overlap and power consumption, and the innermost segment's radius is designed to maintain connection stability, with the ability to split segments circumferentially to isolate signals from individual access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the transducer coverage area is increased to cover multiple access points, then coverage is improved, but interference from multiple access points increases
Solution Approach 1:
The transducer coverage area is divided into multiple concentric segments (first segment, second segment, third segment) with different radial distances from the transducer. Each segment is configured to associate with a specific access point, allowing the transducer to cover multiple access points while reducing interference by spatially separating their signal reception zones.
Solution Approach 2:
Different segments of the transducer coverage area are assigned different functional qualities - inner segments for primary access point communication, outer segments for secondary access points. This local differentiation allows simultaneous coverage of multiple access points while managing interference through selective signal processing in different spatial zones.
2Object-affected harmful factors
If the transducer coverage area is decreased to reduce interference, then interference is reduced, but coverage is reduced
Solution Approach 1:
Rather than using a single small coverage area, the system employs multiple concentric segments that collectively provide extensive coverage. Each segment can be independently configured to manage interference from specific directions, achieving both broad coverage and interference reduction simultaneously.
3Reliability
If power consumption is increased to maintain connection stability during handovers, then connection stability is improved, but power consumption increases
Solution Approach 1:
The system establishes connection handover procedures in advance by configuring multiple segments with predetermined association rules for different access points. When a handover is needed, the device can smoothly transition between segments without sudden power spikes, as the segment associations are pre-established based on spatial geometry and access point locations.
4Productivity
If data transfer speed is increased through high-frequency modulation, then data transfer speed is improved, but susceptibility to interference increases
Solution Approach 1:
By dividing the coverage area into concentric segments and associating each with specific access points, the system can selectively receive signals from different segments. This spatial segmentation allows high-speed data transfer on primary links while filtering out interference from other directions, maintaining both speed and interference resistance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances data transfer speeds by reducing interference, improves coverage, conserves power, and maintains stable connections during handovers by ensuring that each segment covers only one access point, thereby optimizing communication links.
Implementation Method 1
Light Fidelity (Li-Fi) refers to techniques whereby information is communicated in the form of a signal embedded in visible light, infrared light or ultraviolet light emitted by a light source
Implementation Method 2
the light sensor may be a photodiode
Data Source
AI summary
According to one aspect disclosed herein, there is provided a client device for use in an optical wireless communications network, the client device comprising a transceiver configured to receive data via an optical wireless connection. The transceiver comprises an upward facing optical transducer configured to detect or transmit an optical wireless transmission, the sensor arranged to have a coverage area with at least two 5 concentric segments. A portion of the sensor is configured to provide an outermost segment of the at least two concentric segments.