BLE Slave Device Latency Control via Transmission Count
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Solution Overview
Problem
In Bluetooth Low Energy (BLE) radio communication systems, the slave device's power consumption control through slave latency operation limits the response speed due to the slave device determining the frequency of data transmission, which can be slow when quick responses are needed.
Innovation Solution
A radio communication apparatus that includes a control unit to limit data reception until a specific number of times of transmission, as indicated by specific information in the received data, and release the limitation when the number of times of transmission reaches that specific number, allowing for faster response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the slave device determines the frequency of data transmission through slave latency operation, then power consumption is controlled, but response speed is limited
Solution Approach 1:
The patent applies dynamics by making the reception limitation flexible rather than fixed. The slave device dynamically adjusts its reception behavior based on the specific number of times indicated in received data, allowing it to switch between power-saving mode and quick-response mode as needed. This resolves the contradiction by enabling the system to adapt its response speed dynamically while maintaining power consumption control when not in urgent communication scenarios.
Solution Approach 2:
The patent changes the parameter of reception frequency from a fixed value determined by slave latency operation to a variable value indicated by specific information in the data. The master device can control the slave device's reception behavior by embedding different specific numbers of times in the transmitted data, allowing parameter adjustment to balance power consumption and response speed based on communication needs.
2Loss of energy
If the slave device limits data reception to control power consumption, then energy efficiency is improved, but the frequency of data transmission is determined by the slave device which may not meet master device requirements
Solution Approach 1:
The patent implements feedback by having the master device embed specific information (specific number of times) in the transmitted data that tells the slave device how many times to limit reception. This feedback mechanism allows the master device, which has the overall communication requirements in mind, to control the slave device's reception behavior, ensuring that energy efficiency is achieved while meeting the master device's operational requirements.
Solution Approach 2:
The specific information embedded in the transmitted data acts as an intermediary that carries the master device's reception control instructions to the slave device. This intermediary mechanism enables the master device to indirectly control the slave device's power consumption and reception frequency, bridging the control gap that exists in traditional slave latency operation where only the slave device could determine its own reception behavior.
Data Source
AI summary
In CE4, a communication terminal transmits data including a latency_off value “1”. After receiving the data, an environment information measuring apparatus transmits data since a latency counter value is “0”. The latency counter value becomes “2” and a latency_off counter value becomes “1”. In CE5, the communication terminal transmits data including a latency_off value “0”. Since each of the latency counter value and the latency_off counter value is not “0”, the environment information measuring apparatus does not receive the data from the communication terminal. The latency counter value becomes “1” and the latency_off counter value becomes “0”. In CE6, since the latency_off counter value is “0”, the environment information measuring apparatus receives the data from the communication terminal.