Restricted Target Wake Time Signaling for Latency
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Solution Overview
Problem
Existing Target Wake Time (TWT) technologies primarily focus on power savings and do not effectively address real-time latency reductions, particularly in latency-sensitive traffic and low power configuration scenarios.
Innovation Solution
The implementation of Restricted Target Wake Time (R-TWT) signaling, which utilizes reserved bits in the Broadcast TWT parameter set field to set parameters for R-TWT, enhancing TWT operations for real-time application traffic and low power configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional TWT is used for power savings, then device battery life is extended, but real-time latency is not reduced
Solution Approach 1:
The patent segments TWT operations into two distinct modes: traditional TWT for power savings and Restricted TWT (R-TWT) for real-time latency reduction. This segmentation allows devices to choose the appropriate mode based on traffic requirements, resolving the contradiction between power consumption and latency by providing specialized protocols for each objective.
Solution Approach 2:
The patent introduces dynamic parameters for R-TWT including variable service period durations, adjustable wake intervals, and flexible traffic flow specifications. These dynamic adjustments allow the system to optimize both power consumption and latency performance based on real-time network conditions and traffic characteristics.
2Productivity
If TWT service periods are extended for more traffic, then throughput increases, but power consumption increases
Solution Approach 1:
The patent employs parameter changes by introducing R-TWT specific parameters including service period length, wake interval, and traffic flow specifications. These parameters can be dynamically adjusted to achieve optimal balance between throughput and power consumption, allowing extended service periods only when necessary for real-time traffic while maintaining power efficiency for other traffic types.
3Productivity
If multiple overlapped TWT service periods are allowed on different links, then spectral efficiency improves, but complexity of managing overlapping periods increases
Solution Approach 1:
The patent applies local quality by allowing different TWT parameters and overlap management rules for different links based on their specific requirements. Each link can be configured with appropriate service period parameters, enabling spectral efficiency improvements through controlled overlaps while managing complexity through link-specific optimization rather than uniform global management.
Data Source
AI summary
A wireless protocol performing Restricted Target Wait Time (R-TWT) signaling and its parameters to reduce latency, such as for real-time application traffic. Further control of traffic flow is provided during the R-TWT Service Period (SP), including whether: R-TWT SP can be extended, multiple overlapped R-TWT SPs on different links can be started, spatial reuse is required during R-TWT SP, allowance of transmission outside R-TWT SP, or use of Quiet element to protect R-TWT SP, whereby R-TWT operation (mode) is described with enhanced operations. Protocol is applicable to Wireless Local Area Networks (WLANs), and is especially well suited for 802.11be 802.11ax, Real-Time Application (RTA) traffic such as on time sensitive networks, Wi-Fi and on Multi-Link Devices (MLDs).