Bluetooth Mesh Gateway Wake-Up Notification Mechanism
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Solution Overview
Problem
Bluetooth mesh networks face challenges in achieving low-power, low-delay communication, as existing mechanisms either consume high power due to constant reception or result in high delays due to asynchronous communication modes.
Innovation Solution
A Bluetooth mesh network system that employs a gateway and devices cooperating to reduce power consumption and communication delays by utilizing periodic waking periods, where devices are in a dormant state by default and activated only when necessary, allowing for efficient data transmission during waking periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If devices use constant reception mode to achieve low-delay communication, then communication delay is reduced, but power consumption increases
Solution Approach 1:
The patent implements periodic waking periods where Bluetooth devices alternate between dormant state and active reception state. Devices wake up at predetermined intervals to check for messages, then return to dormant state. This periodic activation reduces power consumption compared to constant reception while maintaining acceptable communication responsiveness by tuning the wake interval frequency.
2Use of energy by moving object
If devices use dormant state to reduce power consumption, then power consumption is reduced, but communication delay increases
Solution Approach 1:
The gateway transmits wake-up notifications to devices before actual data messages arrive. This preliminary action alerts devices to wake from dormant state in advance, ensuring they are receptive when data arrives. The notification mechanism allows devices to maintain dormant state longer while still achieving low-delay communication through advance warning.
Solution Approach 2:
The system implements acknowledgment mechanisms where devices confirm receipt of wake-up notifications and gateway confirms data delivery. This feedback loop enables dynamic adjustment of wake intervals and ensures reliable communication even with dormant devices, reducing effective delay through coordinated timing information.
3Use of energy by moving object
If asynchronous communication mode is used to reduce power consumption, then power consumption is reduced, but communication delay increases
Solution Approach 1:
The gateway maintains continuous monitoring and transmission capability while devices use intermittent dormant periods. The gateway continuously manages message queues, sends wake-up notifications at optimal times, and coordinates multiple devices' wake schedules. This continuous gateway action ensures asynchronous device operation doesn't create delays, as the gateway proactively bridges timing gaps.
Data Source
AI summary
An instruction that is receivable by a Bluetooth device during a waking period of the Bluetooth device is transmitted, wherein the waking period of the Bluetooth device occurs cyclically with a specified cycle length and the instruction indicates to the Bluetooth device that a communication data is forthcoming to the Bluetooth device. A data transmission mode for transmission of the communication data is selected based at least in part on a first length of time needed to transmit the communication data and a second length of time equal to the waking period of the Bluetooth device. The communication data is transmitted to the Bluetooth device using the selected transmission mode.