Luminaire De-synchronization Detection and Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In distributed lighting networks without a central controller, luminaires often become de-synchronized due to multicast transmission failures, leading to inefficient energy usage and lighting level inconsistencies, as they lack a central device to manage and correct their status.
Innovation Solution
A luminaire can detect and correct its own de-synchronization by evaluating status messages from other luminaires, using trigger information to distinguish synchronized from de-synchronized status messages, and adjusting its status based on consensus among messages from a predetermined threshold of synchronized luminaires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If distributed architecture is used without central controller, then device complexity is reduced and ease of operation is improved, but reliability of synchronization deteriorates due to multicast transmission failures
Solution Approach 1:
Each luminaire independently detects its own synchronization status by comparing its lighting state with status information from other luminaires and automatically corrects de-synchronization by adjusting its lighting state, eliminating the need for a central controller
Solution Approach 2:
Luminaires exchange status information through multicast transmissions and use this feedback to detect de-synchronization. The system implements a correction mechanism where luminaires compare their state with received status information and adjust accordingly to maintain synchronization
2Reliability
If status information is transmitted frequently to maintain synchronization, then synchronization reliability is improved, but energy consumption increases
Solution Approach 1:
Status information is transmitted periodically through multicast communications at optimized intervals, balancing the need for synchronization updates with energy conservation. The periodic transmissions allow luminaires to detect de-synchronization while minimizing unnecessary communication overhead
3Productivity
If multicast transmission is used for status information, then communication efficiency is improved, but loss of information increases due to routing failures
Solution Approach 1:
The system transmits status information to multiple luminaires simultaneously using multicast, accepting that some packets may be lost due to routing failures. The redundancy of receiving status information from multiple different luminaires compensates for individual packet losses, ensuring that at least some luminaires receive the synchronization information
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a luminaire (1d) connected to a plurality of further luminaires (1a-c, 2a-e) allocated to at least one group via a network. In order to detect and correct a de-synchronization, the luminaire (1d) is configured to (i) receive a status message from each of the further luminaires (1a-c, 2a-e), each status message including status information indicating a current status of the respective luminaire (1a-c; 2a-e) and trigger information about a trigger that prompted the respective luminaire (1a-c; 2a-e) to adopt the current status, (ii) select at least some of the received status messages based on the trigger information included therein, and (iii) compare the selected status messages and change its own status to a new status based on the comparison. Further, the invention is related to a corresponding method for changing the status of the luminaire (1d).