Beacon Alignment for Soft Access Point Power Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In artificial reality systems, such as VR, AR, or MR, the latency between user movement and image display can cause judder, leading to motion sickness and a degraded user experience due to the need for precise and timely detection of head location and gaze direction, which requires efficient power management in devices like head wearable displays (HWDs) and computing devices.
Innovation Solution
Implementing a dynamic scheduling method for wake-up time intervals in computing devices that operate as intermediate devices between access points and HWDs, allowing them to efficiently switch between sleep and wake-up modes to conserve power by receiving and transmitting beacon frames within specific time intervals, thereby reducing the frequency of power-intensive mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device frequently transitions between sleep and wake-up modes to maintain communication, then communication responsiveness is improved, but power consumption increases
Solution Approach 1:
The device uses periodic beacon frames to trigger wake-up intervals, where the access point transmits beacon frames at regular intervals and the station device wakes up periodically to receive these beacons and transmit data, replacing continuous monitoring with periodic actions to reduce power consumption while maintaining communication responsiveness
Solution Approach 2:
The system implements autonomous power management where the station device automatically determines wake-up timing based on received beacon frames and data buffer status, and the access point autonomously transmits beacon frames according to configured intervals, eliminating the need for manual intervention and optimizing power usage through self-regulating mechanisms
2Loss of time
If the device remains in wake-up mode continuously to ensure low latency, then latency is reduced, but battery life decreases
Solution Approach 1:
The system implements periodic wake-up intervals synchronized with beacon frame transmission, where the station device wakes up only when needed to receive beacons or transmit data, then returns to sleep mode, achieving low latency for time-critical operations while extending battery life through periodic rather than continuous operation
Solution Approach 2:
The wake-up interval duration is dynamically adjusted based on communication activity patterns, data buffer status, and latency requirements, allowing the system to extend wake-up periods during active communication for low latency while extending sleep periods during inactivity to conserve battery, creating a dynamic balance between latency and power consumption
3Reliability
If the station device wakes up frequently to check for beacon frames, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The station device uses feedback from received beacon frames and data buffer status to intelligently determine wake-up timing, waking up only when beacon frames indicate incoming data or when the data buffer contains pending transmissions, thereby maintaining communication reliability while avoiding unnecessary wake-ups that would consume power
Solution Approach 2:
The autonomous power management mechanism automatically monitors communication status, data buffer conditions, and beacon frame patterns to self-regulate wake-up intervals, eliminating the need for continuous high-power monitoring while ensuring the device wakes up reliably when communication is required
Data Source
AI summary
Disclosed herein are related to a first device to communicate with a second device and a third device. In one aspect, the first device determines a first time interval to receive a first beacon frame from the second device. In one aspect, the first device determines, according to the first time interval, a second time interval for the first device to transmit a second beacon frame to a third device. In one aspect, the first device determines a third time interval to operate the first device in a wake up mode. The third time interval may encompass the first time interval and the second time interval. In one aspect, the first device receives the first beacon frame from the second device during the first time interval, and transmits the second beacon frame to the third device during the second time interval.