Broadcast TWT Negotiation for Multi-Link Power Efficiency
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Solution Overview
Problem
Multi-link devices (MLDs) in wireless local area networks (WLANs) lack support for broadcast Target Wake Time (TWT) operation, which is essential for efficient power management and performance optimization, leading to potential performance degradation.
Innovation Solution
The implementation of methods and apparatuses that enable MLDs to participate in broadcast TWT operations by negotiating and aligning TWT schedules across multiple links, allowing for efficient power management and improved performance by synchronizing wake times across affiliated stations and access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If broadcast TWT operation is implemented for multi-link devices, then power efficiency is improved and wake times are synchronized across multiple links, but device complexity increases due to the need to manage and align TWT schedules across multiple links
Solution Approach 1:
The patent merges broadcast TWT operation with multi-link operation by allowing a non-AP MLD to negotiate a broadcast TWT agreement over one link that applies to multiple links simultaneously. This combines the power saving benefits of broadcast TWT with the multi-link capability, enabling synchronized wake times across all affected links while using a single negotiation process.
Solution Approach 2:
The broadcast TWT agreement serves multiple functions: it provides power saving for all STAs in the non-AP MLD, synchronizes wake times across multiple links, and enables efficient power management for latency-sensitive applications. A single agreement covers multiple links rather than requiring separate TWT negotiations for each link.
2Loss of time
If TWT parameters are optimized for latency-sensitive applications, then latency is reduced, but power efficiency may be compromised due to more frequent wake times
Solution Approach 1:
The patent applies different TWT parameter configurations to different traffic types and links based on their specific requirements. Latency-sensitive applications can have optimized TWT parameters (shorter intervals) while other traffic can use longer intervals, allowing each link and traffic stream to have locally optimized parameters that balance latency and power efficiency.
Solution Approach 2:
The TWT configuration dynamically adapts to network and service status variation. The system can adjust wake intervals and durations based on current traffic conditions, application requirements, and network state, enabling optimization of both latency and power efficiency depending on real-time needs rather than using fixed parameters.
Data Source
AI summary
Embodiments of the present disclosure provide methods and apparatuses for facilitating broadcast target wake time (TWT) operation in a wireless local area network. The apparatuses include a non-access point (AP) multi-link device (MLD) comprising a transceiver and a processor operably coupled to the transceiver. The processor is configured to perform a multi-link (ML) setup operation with an AP MLD to set up links between the STAs affiliated with the non-AP MLD and corresponding APs affiliated with the AP MLD, negotiate a broadcast TWT agreement over a first link between a first STA and a first AP of the AP MLD, wherein the broadcast TWT agreement is for a shared TWT session including a group of the links, and after the broadcast TWT agreement is successfully negotiated, apply the broadcast TWT agreement to the group of links.