Optical Communication Supplemental Downlink via LED Display
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Solution Overview
Problem
Existing communication systems using optical communication struggle to establish quick and reliable communication, especially in dynamic environments with moving obstacles, and fail to efficiently utilize multiple input multiple output (MIMO) processing across display units.
Innovation Solution
A communication system that employs a display control device to encode and display videos with optical communication signals, using a two-dimensional pilot symbol and segment-based processing to facilitate rapid communication setup and error detection, enabling MIMO processing and supplemental downlink communication through optical and wireless means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If optical communication is used for supplemental downlink, then communication capacity is improved, but processing time is increased due to complex protocol establishment
Solution Approach 1:
The patent applies preliminary action by pre-defining protocol parameters, pilot symbol patterns, and communication rules before actual optical communication begins. The system establishes communication protocols, training sequences, and data formats in advance, allowing rapid connection establishment without complex real-time negotiations, thus reducing processing time while maintaining high communication capacity
Solution Approach 2:
The patent segments the communication protocol into distinct functional modules including pilot symbol transmission, channel estimation, data modulation, and error correction. This segmentation allows independent optimization of each module and parallel processing, reducing overall processing time while maintaining comprehensive communication capabilities
2Reliability
If MIMO processing is implemented across multiple display units, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent merges multiple display units into a coordinated MIMO system where multiple transmitters work together with multiple receivers. By combining the processing functions and synchronizing the operation of multiple display units, the system achieves improved communication reliability through spatial diversity while managing complexity through unified control architecture
Solution Approach 2:
The patent implements universal processing functions that can operate across single or multiple display units. The same pilot symbol generation, channel estimation, and data decoding algorithms are applied universally whether one or multiple display units are active, allowing the system to scale from simple to complex configurations without requiring fundamentally different processing approaches
3Speed
If two-dimensional pilot symbols and segment-based processing are used, then communication speed is improved, but adaptability to moving obstacles deteriorates
Solution Approach 1:
The patent applies dynamics by making the communication system adaptive to changing conditions. The system continuously monitors channel quality and adjusts parameters such as modulation depth, pilot symbol density, and segment boundaries in real-time. This dynamic adaptation allows the system to maintain high communication speeds while responding to moving obstacles and changing environmental conditions
4Use of energy by moving object
If invisible light is used for optical communication, then energy efficiency is improved, but detection difficulty increases
Solution Approach 1:
The patent uses invisible light (infrared or other non-visible wavelengths) as the communication carrier, which is more energy-efficient than visible light. To overcome the detection difficulty, the system employs specialized photodetectors and signal processing algorithms that are sensitive to invisible wavelengths. The intermediary role of these specialized detection devices bridges the gap between energy-efficient invisible light transmission and reliable signal detection
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 solution allows for efficient communication in poor environments by shortening processing time, adapting to changing conditions, and enabling high-throughput communication using multiple optical links and single light source illuminations, even in areas with weak radio waves.
Implementation Method 1
a display unit configured to display a video... a communication system which performs communication by displaying image information on a projector installed outdoors, a wall surface of a building, or the like
Implementation Method 2
a communication terminal which has an imaging unit configured to capture the video displayed by the display unit
Data Source
AI summary
In the present application, for a detailed protocol for realizing supplemental downlink communication in the filed patent, particularly, a system is proposed which performs training processing at high speed by using two-dimensionally developed information. In the present application, compared to the filed patent, a two-dimensional pilot symbol can be used in a display unit, further, introduction of a segment for communication band control using a two-dimensional pilot symbol, training processing using a two-dimensional test pattern for establishing a communication path, and a configuration of a communication frame are clarified, and MIMO processing of communication using video information by a plurality of segments is realized to improve a throughput of an existing portable phone.