Wireless Interface TWT Scheduling for Periodic WLAN Sensing
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Solution Overview
Problem
WLAN sensing systems experience increased power consumption, contention levels, and restricted transmission flexibility due to devices needing to remain in a wake state for periodic sensing measurements.
Innovation Solution
A wireless network interface device negotiates parameters for periodic sensing measurements, including a sleep mode schedule, to transition between wake and doze states, reducing energy consumption and contention levels while maintaining transmission flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If devices remain in wake state for periodic sensing measurements, then sensing measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic sensing measurements where devices transition between wake and sleep states at scheduled intervals. Devices wake up at specific times to perform sensing measurements and then return to sleep mode, rather than remaining continuously awake. This periodic operation maintains measurement accuracy while significantly reducing power consumption compared to continuous operation.
Solution Approach 2:
The patent uses Target Wake Time (TWT) scheduling to pre-arrange wake intervals and availability windows before sensing measurements occur. By negotiating and establishing the schedule in advance, devices know exactly when to wake up for measurements, ensuring measurement accuracy is maintained while allowing devices to sleep during non-measurement periods, thus reducing power consumption.
2Reliability
If devices remain in wake state for periodic sensing measurements, then sensing measurement reliability is improved, but contention levels increase
Solution Approach 1:
The patent implements periodic sensing measurements with scheduled wake intervals and availability windows. By confining sensing activities to specific periodic time slots rather than allowing continuous or unscheduled access, the system reduces contention for wireless medium access while maintaining measurement reliability through consistent periodic operation.
Solution Approach 2:
The patent negotiates and establishes TWT schedules and availability windows in advance before sensing measurements begin. This preliminary scheduling allocates specific time slots for sensing activities, reducing contention by preventing random or conflicting access attempts. The pre-arranged schedule ensures reliable measurements while minimizing contention levels through structured time division.
3Stability of the object's composition
If devices remain in wake state for periodic sensing measurements, then sensing measurement consistency is improved, but transmission flexibility is restricted
Solution Approach 1:
The patent implements dynamic TWT scheduling where wake intervals and availability windows can be negotiated, adjusted, and reconfigured based on changing conditions. The system allows for multiple TWT schedules with different parameters, enabling flexible adaptation of sensing measurement timing while maintaining consistency through structured periodic operation. Devices can transition between different scheduling agreements as needed.
Data Source
AI summary
Embodiments of a device, a method, and a system for periodic wireless local area network (WLAN) sensing are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to negotiate parameters for performing periodic sensing measurements, and implement the negotiated parameters when performing the periodic sensing measurements.