VLC Terminal Mode Switching for Indoor LBS Positioning
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Solution Overview
Problem
Existing Location Based Service (LBS) systems using Visible Light Communication (VLC) face challenges in configuring lighting devices and terminals to optimize service modes in various indoor environments, particularly where RF communication is limited, leading to inefficient data transmission and reception.
Innovation Solution
A mode switching apparatus and method that includes a coordinator and terminal capable of generating and transmitting data with identification information of light sources, allowing terminals to identify locations and switch between transmission and reception modes based on the configuration of lighting devices and terminals, optimizing service scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If VLC-based LBS system uses lighting devices configured for transmission only, then device complexity is reduced, but communication efficiency deteriorates when terminal needs to send requests
Solution Approach 1:
The terminal dynamically switches between transmit mode and receive mode based on the configuration of the lighting device. When the lighting device is transmission-only, the terminal inactivates its transmit mode and operates in receive mode only, adapting its communication behavior to the system configuration to maintain efficiency while simplifying the lighting device.
Solution Approach 2:
The system changes the operational parameters of the terminal (transmit/receive mode activation) based on the lighting device configuration. This parameter adjustment allows the system to optimize communication efficiency for different deployment scenarios without increasing lighting device complexity.
2Adaptability or versatility
If terminal operates in both transmit and receive modes, then communication versatility is improved, but energy consumption increases
Solution Approach 1:
The terminal dynamically adjusts its operational mode (transmit or receive) based on the lighting device configuration and service scenario, rather than maintaining both modes active simultaneously. This dynamic adaptation reduces energy consumption while preserving communication versatility when needed.
Solution Approach 2:
The terminal changes its operational parameters (activating or inactivating transmit mode) based on system configuration and service requirements, optimizing energy consumption by only using communication capabilities necessary for the current scenario.
3Adaptability or versatility
If system automatically switches modes based on lighting device configuration, then service scenario adaptability is improved, but system complexity increases
Solution Approach 1:
The terminal detects the configuration of the lighting device (transmission-only or bidirectional) and uses this feedback information to automatically determine the appropriate operational mode. This feedback mechanism enables service scenario adaptability while keeping the switching logic relatively simple and centralized in the terminal.
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
Enables convenient and efficient operation of positioning services by automatically switching modes to match the transmission/reception capabilities of lighting devices and terminals, ensuring optimal data transmission and reception in VLC-based LBS systems, even in indoor environments.
Implementation Method 1
VLC refers to a wireless communication technology based on the light in a visible wavelength range, which performs wireless communication using visible radio waves
Implementation Method 2
a receiver processes the visible light using a Photo Detector (PD), thereby achieving VLC
Data Source
AI summary
A method and a lighting device for providing a Location Based Service (LBS) service providing a Location Based Service (LBS) based on Visible Light Communication (VLC) is provided. The method includes receiving, by at least one light source, data from a coordinator, the data including identification information of the at least one light source that corresponds to location information of the at least one light source, which is used by a terminal to identify a location of the at least one light source; and transmitting, by the at least one light source, the data to the terminal in a VLC signal.