WLAN Access Point Schedule Sharing for Artificial Reality Latency

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Solution Overview

Problem

Existing systems in artificial reality environments face challenges in coordinating access points to manage latency-sensitive traffic effectively, leading to issues like judder and motion sickness due to latency in image rendering, which degrades user experience.

Innovation Solution

Implementing a mechanism for access points to share schedules using Time-Wake Tuning (TWT) and Restricted-TWT (R-TWT) to coordinate and prioritize latency-sensitive traffic, reducing power consumption and enhancing medium access protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If access points operate independently without schedule coordination, then device complexity is reduced, but latency increases leading to judder and motion sickness

Engineering Contradiction:

ImprovelatencyVSAvoidschedule coordination mechanism

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent introduces a schedule sharing mechanism where access points exchange timing information through a coordinated protocol. This intermediary coordination layer enables latency reduction by synchronizing access point operations without requiring complex direct interference management between all pairs of access points, thus resolving the contradiction between latency reduction and system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If access points continuously monitor and coordinate with each other, then medium access protection improves, but power consumption increases

Engineering Contradiction:

Improvemedium access protectionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic schedule updates between access points rather than continuous monitoring. Access points exchange schedule information at defined intervals and maintain coordination during these periods, providing reliable medium access protection while significantly reducing power consumption compared to continuous real-time coordination.

Inventive Principle:

Principle #19Periodic action

3Object-affected harmful factors

If multiple access points operate in overlapping BSS without coordination, then ease of operation is maintained, but harmful interference increases causing degraded user experience

Engineering Contradiction:

ImproveinterferenceVSAvoidindependent AP operation

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent applies preliminary scheduling where access points pre-coordinate their transmission schedules before operating in overlapping BSS environments. By establishing timing relationships in advance through schedule sharing, access points can operate independently during execution while avoiding harmful interference, thus maintaining ease of operation without sacrificing interference reduction.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250324450A1Systems and methods for coordinating access points using schedule sharing

Publication Date: 2025.10.16 META PLATFORMS TECHNOLOGIES LLC

AI summary

In some embodiments, a first access point may include one or more processors and a transceiver for operating in a wireless local area network (WLAN). The one or more processors may be configured to receive, via the transceiver associated with a first basic service set (BSS), information relating to a first schedule from a second access point of the WLAN associated with a second BSS different from the first BSS. The one or more processors may be configured to generate a second schedule based on the information relating to the first schedule. Each of the first schedule and the second schedule may indicate timing information for coordinating between the second access point and the first access point.