Bluetooth Low Energy Beacon Power Management
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Solution Overview
Problem
Bluetooth Low Energy (BLE) beacons consume excessive power due to constant active mode operation, even when no mobile devices are present, leading to reduced battery life and increased maintenance costs.
Innovation Solution
Implementing a power save mode where the BLE beacon only listens for network communication with the transmitter deenergized, switching to active mode only when a mobile device is detected, and automatically returning to power save mode when conditions are met, such as no mobile device presence or a predetermined time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BLE beacon operates in active mode continuously to broadcast messages, then the message transmission function is ensured, but the battery power is consumed excessively and battery life is reduced
Solution Approach 1:
The beacon dynamically switches between active mode and power save mode based on whether mobile devices are detected in the vicinity. The system transitions from a static continuous transmission approach to a dynamic adaptive approach, activating the transmitter only when needed (when mobile devices are present) and entering power save mode when no devices are detected, thereby resolving the contradiction between ensuring message transmission function and reducing battery power consumption
Solution Approach 2:
The system changes the operational parameters of the beacon by switching between two distinct states: active mode with full transmission functionality and power save mode with minimized power consumption. This parameter change approach allows the beacon to adapt its power consumption level based on the presence of mobile devices, effectively resolving the contradiction between maintaining transmission reliability and reducing energy use
2Productivity
If the BLE beacon operates in active mode to periodically transmit messages, then the location-based services are maintained, but the battery working lifetime is reduced and maintenance costs increase
Solution Approach 1:
The beacon implements periodic checking for mobile device presence and switches between active and power save modes accordingly. Instead of continuous transmission, the system performs periodic detection of mobile devices and adjusts its operational state based on these periodic checks, maintaining service availability when needed while extending battery life during periods of no activity
Solution Approach 2:
The invention extracts the essential function of the beacon (detecting mobile devices and providing location-based services) from the continuous transmission operation. By taking out only the necessary transmission activity (when mobile devices are present) and separating it from unnecessary continuous transmission, the system maintains productivity while significantly extending battery working lifetime
3Ease of operation
If the BLE beacon transmits messages frequently to ensure service coverage, then the user experience is improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The system uses feedback from mobile device detection to control transmission activity. When mobile devices are detected, the beacon switches to active mode and transmits messages to maintain good user experience. When no devices are detected, it transitions to power save mode to minimize energy waste. This feedback-based control resolves the contradiction by making transmission behavior responsive to actual service needs
Data Source
AI summary
A Bluetooth low energy (BLE) beacon in a BLE network is electrically powered by a battery, broadcasts messages, and listens for a network communication indicative of whether a mobile device is present in a venue. A beacon controller controls the beacon to periodically broadcast the messages and to periodically listen for the network communication during an active mode of operation, to not broadcast the messages to conserve power from the battery and to listen for the network communication during a power save mode of operation, and to switch from the power save mode to the active mode when the network communication received during the power save mode indicates that a mobile device is present in the venue.