Networked Lighting Multicast Control Compression
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Solution Overview
Problem
Conventional networked lighting systems face inefficiencies in controlling large-scale LED lighting systems due to high bandwidth requirements and limited flexibility, as they need to transmit individual light settings to each luminaire, leading to communication overhead and synchronization issues.
Innovation Solution
The solution involves creating a multicast message that compresses light settings using predetermined functions, allowing each luminaire to calculate its specific settings based on its location or address, reducing the need for individual transmissions and enabling flexible, efficient control of multiple luminaires with a single message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unicast messages are transmitted to each luminaire individually, then each luminaire can receive its specific light setting, but the bandwidth requirement increases significantly
Solution Approach 1:
The patent combines multiple individual control messages into a single multicast message that contains a compressed representation of light settings for multiple luminaires. Instead of sending separate unicast messages to each luminaire, the system merges all control information into one message using compression functions, thereby reducing bandwidth consumption while maintaining individualized control capability
Solution Approach 2:
The patent changes the parameter representation by using compression functions (such as linear functions, polynomial functions, or trigonometric functions) to represent multiple light setting parameters in a compact form. The multicast message contains compressed parameters that can be expanded by each luminaire based on its identifier, transforming a large set of individual parameters into a compact representation that reduces message size and bandwidth requirements
2Quantity of substance
If traditional multicast messages are used to address multiple luminaries, then bandwidth is reduced, but flexibility to provide individual light settings is lost
Solution Approach 1:
The patent introduces compression functions as an intermediary mechanism between the multicast message and the individual luminaire settings. The compressed representation in the multicast message acts as an intermediary that, when processed with the luminaire's identifier, yields the specific light setting for each individual luminaire. This intermediary approach enables both bandwidth efficiency and individualized control flexibility
Solution Approach 2:
The patent makes the control system dynamic by allowing each luminaire to dynamically compute its specific light setting from the compressed multicast message using its own identifier. Instead of statically assigning fixed settings or requiring separate messages, the system dynamically generates individual settings on-demand at each luminaire based on the compressed representation and the luminaire's unique identifier
3Measurement precision
If individual light settings are transmitted to each luminaire, then precise control is achieved, but communication overhead increases
Solution Approach 1:
The patent extracts only the essential compressed representation of light settings into the multicast message, removing the need to transmit redundant individual setting information. By extracting and transmitting only the compressed parameters along with a reference to the compression function, the system achieves precise control capability while minimizing communication overhead, as each luminaire can locally reconstruct its specific setting without receiving the full uncompressed data
Data Source
AI summary
The invention relates to the control of networked lighting systems, particularly large scale networked lighting systems, and more specifically to an efficient transmission of messages to control luminaries of a networked lighting system. A basic idea of the invention is to provide an efficient and flexible multicast, particularly group cast message that addresses several or a group of luminaires, and that can control the addressed luminaries in an efficient way by compressing the distributed light settings using a function in order to reduce the communicational overhead. An embodiment of the invention relates to a method for controlling a networked lighting system comprising the steps of—selecting several controllable luminaries of the networked lighting system (S10), —combining control information for each one of the selected luminaries to a set of information control information (S12), —selecting at least one predetermined function for compressing the set of control information by associating an input related to a selected controllable luminary to the control information for the selected controllable luminary from the set of control information (S14), —creating a multicast message addressed to the selected luminaries and comprising information regarding the selected predetermined function (S16), and—transmitting the created multicast message (S18).