Bluetooth Mesh Group Device Control via Synchronized Timing
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Solution Overview
Problem
Existing Bluetooth mesh networks face challenges in efficiently controlling and coordinating group devices due to issues with packet transmission delays and interference, leading to inconsistent operation timing and user inconvenience.
Innovation Solution
A method and device for controlling group devices in a Bluetooth mesh network using Bluetooth Low Energy (BLE) technology, which includes joining the mesh network, receiving control messages, and synchronizing operations among devices, with features such as time intervals, delay times, and reference times to ensure coordinated performance, and adaptive repetition transmission to ensure message receipt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Bluetooth mesh network is used to control group devices, then wireless connectivity and device coordination are enabled, but packet transmission delays and interference occur leading to inconsistent operation timing
Solution Approach 1:
The patent applies preliminary action by having devices synchronize their clocks and establish time references before executing coordinated operations. The control device sends synchronization messages that include reference time information, allowing all group devices to align their operation timing in advance, thus preventing transmission delays from causing inconsistent operation timing.
Solution Approach 2:
The patent implements periodic action through repeated transmission of control messages and synchronization packets. The control device periodically sends control messages to group devices, and devices periodically report their status, ensuring that even if some packets are delayed or lost, the coordination remains consistent through regular communication cycles.
2Reliability
If control messages are transmitted to group devices, then operations can be coordinated, but message loss or interference may occur causing inconsistent operation
Solution Approach 1:
The patent applies feedback by implementing an acknowledgment mechanism where group devices send confirmation messages back to the control device after receiving and executing control commands. The control device monitors these feedback messages to verify that all devices have received and executed the control messages correctly, allowing it to detect and address any message loss or interference.
Solution Approach 2:
The patent implements beforehand cushioning by incorporating error detection and correction mechanisms in the message transmission protocol. Checksum fields and redundancy coding are included in control messages to protect against data corruption and loss, providing a buffer against communication errors before they can cause operation inconsistencies.
3Productivity
If sequential operations are implemented among group devices, then coordinated performance is achieved, but operation timing precision is challenged by transmission delays
Solution Approach 1:
The patent applies preliminary action by having all group devices synchronize their internal clocks to a common reference time provided by the control device before executing sequential operations. This pre-synchronization ensures that when devices perform operations in sequence, they all reference the same time baseline, maintaining timing precision even though transmissions occur over a wireless mesh network.
Solution Approach 2:
The patent implements dynamics by allowing the operation sequence and timing to be dynamically adjusted based on actual transmission conditions. The control device can modify the sequential operation schedule in real-time based on feedback from devices about their current state and any observed transmission delays, optimizing both productivity and timing precision adaptively.
Data Source
AI summary
Disclosed is a method of a first device being controlled by a control device in a group including the first device and a plurality of devices in a Bluetooth mesh network and a device performing the method. The method includes joining the Bluetooth mesh network, receiving a control message instructing the execution of a specific operation from the control device, and performing the specific operation based on the control message. The specific operation may be sequentially performed by the first device and the plurality of devices.