Dynamic Target Wake Time Schedule Updates in Wireless LANs
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Solution Overview
Problem
Current Target Wake Time (TWT) schedules in wireless local area networks (WLANs) are inflexible and cannot be dynamically updated in response to changes in channel congestion, application traffic profiles, or queue depth without tearing down the existing schedule, leading to inefficiencies and increased overhead.
Innovation Solution
A system and method for dynamically updating TWT schedules by exchanging TWT update request and response frames, using TWT information elements or vendor-specific action frames, to adjust TWT parameters such as target wake time, wake duration, and wake interval in response to detected changes in channel conditions or application traffic, without requiring a complete teardown of the existing schedule.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If TWT schedules are established with fixed parameters, then power saving and network efficiency are improved, but adaptability to changing network conditions deteriorates
Solution Approach 1:
The patent implements dynamic TWT schedule updates by allowing devices to exchange update request and response frames that modify TWT parameters (target wake time, wake duration, wake interval) without tearing down the existing schedule. This enables the system to adapt to changing network conditions such as channel congestion and application traffic profiles while maintaining the power-saving benefits of scheduled wake times.
2Adaptability or versatility
If TWT schedules are updated dynamically, then adaptability to network conditions is improved, but communication overhead increases
Solution Approach 1:
The patent changes the state of the TWT schedule by modifying specific parameters (target wake time, wake duration, wake interval) through structured update frames rather than establishing entirely new schedules. This approach allows selective parameter adjustments that reduce overhead compared to complete schedule re-establishment, while maintaining adaptability to network conditions.
3Manufacturing precision
If existing TWT schedules are torn down for updates, then schedule accuracy is improved, but network efficiency and overhead increase
Solution Approach 1:
The patent prepares for schedule updates by establishing a structured update mechanism in advance, where devices can modify TWT parameters through exchange of update request and response frames. This preliminary framework allows accurate schedule adjustments without tearing down the existing schedule, maintaining network efficiency by avoiding complete schedule re-establishment while ensuring schedule accuracy through controlled parameter modifications.
Data Source
AI summary
A first device may include one or more processors. The one or more processors may be configured to generate, after establishing a target wake time (TWT) schedule having one or more TWT parameters with a second device, a first frame requesting the second device in a wireless local area network (WLAN) to update the one or more TWT parameters of the TWT schedule. The one or more processors may be configured to wirelessly transmit, via a transceiver, the generated first frame to the second device. The one or more processors may be configured to wirelessly receive, via the transceiver from the second device, a second frame indicating whether the one or more TWT parameters have been updated.