Wakeup Receiver Segmentation for Bluetooth Mesh Power
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Solution Overview
Problem
Bluetooth Mesh networks face challenges in maintaining low power consumption while ensuring low-latency responses to infrequent events, as current methods like Friendship require frequent active receiver periods, reducing the operational life of battery-powered nodes.
Innovation Solution
Integrating a wakeup receiver with low-power mesh nodes, allowing the main receiver to remain inactive until a wake-up signal is received, thereby reducing unnecessary active time and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the main receiver remains active frequently to ensure low-latency responses to events, then the response time to events is improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The receiver system is segmented into two independent parts: a low-power wakeup receiver that continuously monitors for events, and a main receiver that remains inactive most of the time but activates when needed. This segmentation allows the system to maintain event responsiveness while dramatically reducing overall power consumption, enabling battery operation for approximately 18 years.
Solution Approach 2:
The wakeup receiver acts as an intermediary component between the external environment and the main receiver. It detects asynchronous events and triggers the main receiver only when necessary, eliminating the need for the main receiver to remain continuously active while ensuring no events are missed.
2Duration of action of moving object
If the main receiver is kept inactive to minimize power consumption, then battery life is extended, but the ability to respond to events is degraded
Solution Approach 1:
The wakeup receiver performs preliminary monitoring of the radio frequency environment continuously at low power consumption. It prepares to trigger the main receiver in advance when an asynchronous event is detected, ensuring that the main receiver can respond immediately to events without needing to remain continuously active.
3Reliability
If frequent active receiver periods are used to maintain low-latency responses, then event detection capability is improved, but the operational life of battery-powered nodes is reduced
Solution Approach 1:
The system employs periodic action through the wakeup receiver, which continuously monitors for events at very low power consumption levels. The main receiver activates periodically only when triggered by the wakeup receiver detecting an event, rather than operating continuously. This periodic activation pattern extends battery operational life to approximately 18 years while maintaining reliable event detection capability.
Data Source
AI summary
A method performed by a low-power node (LPN) in a wireless mesh network, wherein the LPN comprises a main receiver and a wakeup receiver, and wherein the method comprises: performing the following first operations in response to an event trigger: activating the wakeup receiver while maintaining the main receiver in an inactive state, and sending a polling message to a second node in the wireless mesh network; for a predetermined duration, determining whether a wakeup signal has been received from the second node via the wakeup receiver; and performing a plurality of second operations based on determining that the wakeup signal has been received, the second operations including: activating the main receiver, and receiving, from the second node via the main receiver, a response to the polling message.