WPAN Device Sleep Duration Adjustment for Beacon Reception
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Solution Overview
Problem
In beacon-enabled Wireless Personal Area Networks (WPANs), devices consume excessive current due to the need to periodically receive beacons, which increases power consumption and reduces battery life.
Innovation Solution
The method involves optimizing the time a device is awake to receive beacons by adjusting the wake-up period and sleep duration, using a CPU with multiple power states and a clock stability compensation period to minimize power usage, and selectively receiving only necessary beacons to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices periodically receive beacons in beacon-enabled WPANs, then network synchronization and beacon functionality are maintained, but current consumption increases and battery life decreases
Solution Approach 1:
The device enters sleep mode between beacon periods and wakes up only when needed, implementing periodic operation rather than continuous reception. The device can sleep for multiple beacon intervals and wake selectively based on whether it needs to receive the next beacon, reducing energy consumption while maintaining necessary beacon reception functionality
Solution Approach 2:
The device determines in advance whether it needs to receive the upcoming beacon before entering sleep mode. By making this determination preliminarily, the device can skip unnecessary beacon receptions and extend its sleep period, thereby reducing current consumption while ensuring it doesn't miss important beacons
2Reliability
If devices wake up early to receive beacons, then beacon reception is ensured, but time spent awake increases and power efficiency decreases
Solution Approach 1:
The device dynamically adjusts its wake-up timing based on whether it actually needs to receive the beacon. Instead of waking up at a fixed early time for every beacon, the device adapts its wake-up schedule to match its actual reception needs, optimizing the balance between reliable reception and minimizing awake time
Data Source
AI summary
Embodiments of the present invention provide a method of reducing power consumption in a wireless network device, comprising determining a duration prior to a beacon being received by the device; comparing the duration against a predetermined value; and adjusting a duration of a sleep period in response to the comparison.