Locally Unique Identifier Assignment in Coded Lighting Positioning
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Solution Overview
Problem
Existing coded lighting systems face inefficiencies in identifier assignment and modulation due to the need for worldwide unique addresses, leading to long response times and suboptimal illumination contribution estimation, especially when dealing with a large number of light sources.
Innovation Solution
A remote controller that receives coded light from light sources, assigns modified locally unique identifiers, and transmits them back, allowing for efficient identifier assignment and reduced complexity in the lighting system, enabling faster response times and more accurate illumination estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If worldwide unique addresses are used for light source identification, then light sources can be uniquely identified across the entire control network, but the response time of the system increases and performance in illumination contribution estimation decreases
Solution Approach 1:
The patent divides the identification system into two segments: a first identifier with a smaller address space used for local identification and control, and a second identifier with a larger address space used for worldwide unique identification. This segmentation allows the system to use the shorter first identifier for time-critical operations, reducing response time while maintaining the ability to uniquely identify light sources globally when needed.
2Adaptability or versatility
If CDMA and FDMA modulation techniques are used, then coded light communication can be implemented, but the system is limited to smaller numbers of unique codes or frequencies
Solution Approach 1:
The patent introduces a temporal dimension to the identification system by implementing a two-phase commissioning process. In the first phase, light sources use a smaller address space for initial communication and localization. In the second phase, the system assigns larger address spaces for worldwide unique identification. This dimensional approach to address assignment allows the system to overcome the limitations of CDMA and FDMA code spaces by using time-based progression rather than requiring all identifiers to coexist simultaneously.
3Loss of information
If longer address formats are transmitted (e.g., IP addresses, MAC addresses, DALI addresses), then comprehensive identification information is provided, but the address length increases to 70 bits or more
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portion of identification information at each stage. During initial commissioning and localization, only the shorter first identifier is transmitted and processed. The longer second identifier with comprehensive identification information is assigned and transmitted only in the second phase when full identification capability is required. This partial transmission approach reduces the immediate address length requirements while preserving complete identification capability when needed.
Data Source
AI summary
Remote controllers, positioning systems, and methods configured for the efficient assignment of addresses in a coded lighting positioning system are proposed. Particularly, a proposed remote controller comprises a receiver for receiving coded light from a light source in a coded lighting positioning system, where the coded light comprises an initial light source identifier of the light source. The remote controller also comprises a processing unit for assigning a modified light source identifier to the light source based on the received coded light, and a transmitter for transmitting the modified light source identifier to the light source. The modified light source identifier is a locally unique identifier used to provide positional information.