HEMS Relay Apparatus Dynamic Transmission Interval Control
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Solution Overview
Problem
Existing communication systems for home appliances are unable to quickly receive status change information after sending control instructions, as they only adjust the transmission interval of request signals upon receiving status change information, leading to delayed detection of status changes caused by control instructions.
Innovation Solution
A communication system that includes a relay apparatus which sets a shorter transmission interval for status detection signals based on detected status changes, allowing for immediate notification of status changes to the terminal apparatus, and adjusts this interval based on the type of control instruction and the number of transmissions required to detect changes, thereby reducing unnecessary signal transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the transmission interval of request signals is kept at a preset time interval, then the communication system operates with low signal transmission frequency, but the status change detection speed is slow
Solution Approach 1:
The patent applies dynamics by making the transmission interval adjustable rather than fixed. The relay apparatus dynamically changes the transmission interval based on detected status changes - using a first time interval during normal operation and a second, shorter time interval when status changes are detected, thereby optimizing both detection speed and signal transmission quantity
Solution Approach 2:
The patent implements feedback by having the relay apparatus monitor status changes and use this information to adjust the transmission interval. When a status change is detected, the system feedback loop triggers a switch to a shorter transmission interval to quickly confirm the status change, then returns to the normal interval after confirmation
2Loss of time
If the transmission interval is shortened to quickly detect status changes, then the status change detection speed improves, but the number of unnecessary signal transmissions increases
Solution Approach 1:
The system dynamically adjusts the transmission interval based on operational conditions - maintaining a longer first time interval during stable operation to conserve energy, and switching to a shorter second time interval only when status changes are detected, thus minimizing energy loss while ensuring quick status change detection
Solution Approach 2:
The patent changes the time interval parameter from a fixed preset value to a variable that can take two different values. This parameter change is triggered by status change detection, allowing the system to optimize the balance between detection speed and energy consumption by using the shorter interval only when necessary
Data Source
AI summary
A HEMS controller repeatedly transmits a predetermined signal to a control-target appliance at a set time interval in order to detect a change in a status of the control-target appliance. If the status changes, the HEMS controller notifies a smartphone of the changed status via a server apparatus. In a state where the time interval is set to a first time interval, when receiving a control instruction for controlling an operation of the control-target appliance from the smartphone via the server apparatus, the HEMS controller transmits the control instruction to the control-target appliance. In response to the transmission of the control instruction to the control-target appliance, the HEMS controller changes the time interval to a second time interval shorter than the first time interval.