Remote Control System Parameter Synchronization via Source-Filtered Notifications
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Solution Overview
Problem
In remote control systems, there is a delay issue where control devices receive old change notifications due to non-constant time delays in communication networks, causing the parameter values displayed to not directly follow the current operation state, especially when continuously changeable controls like knobs or faders are used.
Innovation Solution
The system includes a change notification mechanism where the controlled device transmits a change notification with source data indicating the control device that sent the change command, allowing only other control devices to update their parameter values based on this data, while the control device that sent the command does not update its value, thus maintaining synchronization with the user's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all control devices update their parameter values upon receiving change notifications, then remote monitoring capability is improved, but parameter synchronization accuracy deteriorates due to network delay causing receipt of outdated notifications
Solution Approach 1:
The patent applies local quality by making different control devices behave differently based on their role. The control device that sent the change command excludes itself from updating its parameter value, while other control devices do update their values. This differentiated approach maintains synchronization accuracy while preserving remote monitoring capability across the network.
2Speed
If change notifications are transmitted frequently to maintain real-time monitoring, then monitoring responsiveness is improved, but network communication efficiency deteriorates due to redundant transmissions
Solution Approach 1:
The patent implements partial action by selectively transmitting change notifications only to control devices that need to update their parameters. By using the source device identifier to determine which devices should receive and process notifications, the system avoids redundant transmissions to the source device itself, reducing network traffic while maintaining monitoring responsiveness for devices that require updates.
Data Source
AI summary
When a controlled device receives a change command from a control device, the controlled device changes a real current memory, generates a change notification that includes first data indicative of the control device having transmitted the change command and second data indicative of the change result in response to the change command, and transmits the generated change notification to the plurality of control devices. Each control device receives a change notification from the controlled devices, changes a virtual current memory based on the second data of the change notification if the first data of the change notification does not indicate the control device. Each control device does not change the virtual current based on the second data included in the change notification if the first data indicates the control device.