Wireless DMX Hub Multiplexing RDM Talkback Data
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Solution Overview
Problem
Existing wireless DMX systems are limited by the 'DMX 512' standard, requiring multiple transmitters for larger installations, leading to increased RF footprint, interference, and slow talkback due to inefficient data distribution and lack of device recognition, which hampers the control of multiple lighting fixtures.
Innovation Solution
A system that time multiplexes RDM protocol talkback data with DMX control data, interrogates devices to determine required DMX slots, and transmits only used slots, allowing for simultaneous broadcasting of multiple universes of data within a single RF footprint, reducing hardware duplication and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmitters are used to control more than 512 lighting fixtures, then the system can support larger installations, but the RF footprint increases causing interference with other wireless systems
Solution Approach 1:
The patent combines multiple DMX universes into a single broadcast stream, allowing one transmitter to handle more than 512 fixtures by efficiently multiplexing data from multiple universes in the RF domain, thus avoiding the need for multiple transmitters and reducing RF interference
Solution Approach 2:
The transmitter is designed to handle multiple DMX universes and support both DMX control and RDM talkback functions within a single device, enabling one transmitter to perform the work of multiple traditional transmitters while maintaining spectral efficiency
2Adaptability or versatility
If all 512 DMX slots are broadcast at all times, then all possible fixtures can be controlled, but bandwidth is wasted when not all slots are in use
Solution Approach 1:
The system extracts and transmits only the specific DMX slots that are actually in use, rather than broadcasting all 512 slots continuously. This selective transmission approach reduces unnecessary RF bandwidth consumption while maintaining full control capability over used slots
Solution Approach 2:
The broadcast content is dynamically adjusted based on which DMX slots are currently in use, allowing the system to adapt the transmission to actual needs and optimize bandwidth utilization in real-time
3Adaptability or versatility
If RDM talkback data is transmitted by interrupting DMX broadcast, then two-way communication is enabled, but DMX data delivery is interrupted for longer periods
Solution Approach 1:
The system enables continuous DMX data delivery while simultaneously transmitting RDM talkback data, eliminating interruptions by using efficient time multiplexing that maintains uninterrupted DMX control streams even during two-way communication
Solution Approach 2:
RDM talkback data is transmitted through efficient periodic time multiplexing within the continuous DMX stream, allowing two-way communication to occur at optimized intervals without creating noticeable interruptions to the primary control function
Data Source
AI summary
A system and method are provided for wireless data broadcasting. The system provides a hub for broadcasting data wirelessly to a plurality of end devices, such as light fixtures, and a plurality of nodes for retrieving at least a portion of the data broadcasted from the hub. Each node is associated with at least one corresponding end device, and transmits data retrieved to the end device. A method is provided for broadcasting the data using the system. The method includes interrogating the nodes and determining what data is required by the corresponding end devices. The hub then packetizes, in RF packets, the required data and transmits data to each of several nodes.