Bidirectional Location Measurement Report Feedback Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current IEEE 802.11az standards lack efficient mechanisms for bidirectional location measurement report (LMR) feedback, particularly in single-user scenarios, where recurring availability windows are not defined, leading to inefficiencies in LMR exchange between initiating and responding devices.
Innovation Solution
The implementation of a bidirectional LMR feedback system that enables both initiating and responding devices to provide immediate or delayed LMR feedback, with a negotiated availability window to optimize the exchange of LMR frames, ensuring both devices' availability within the window, and supporting different feedback types to simplify design and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-sided LMR feedback is used in IEEE 802.11az standards, then device complexity is reduced, but LMR exchange efficiency deteriorates due to lack of bidirectional feedback mechanism
Solution Approach 1:
The patent combines single-sided LMR feedback from initiating device and responding device into a unified bidirectional feedback mechanism. Both devices perform LMR measurements and exchange feedback frames independently, merging two separate feedback streams into a coordinated system that achieves efficient two-way location measurement while maintaining individual device simplicity
Solution Approach 2:
The patent introduces dynamic feedback type indicators that allow each device to independently select between immediate and delayed feedback modes. This dynamic adaptation enables the system to optimize LMR exchange efficiency based on individual device capabilities and channel conditions, resolving the contradiction between simplicity and efficiency
2Loss of time
If immediate LMR feedback is provided by both devices, then latency is reduced, but device complexity increases due to synchronized availability window requirements
Solution Approach 1:
The patent performs preliminary negotiation of availability windows during the capability exchange phase before actual LMR measurements. Each device declares its feedback type preference (immediate or delayed) and availability window characteristics in advance, allowing the system to prepare coordination strategies beforehand and execute low-latency immediate feedback when both devices are available
Solution Approach 2:
Each device independently determines its own feedback type and manages its availability window based on its capabilities. The initiating device and responding device autonomously select immediate or delayed feedback modes without requiring complex centralized coordination, reducing system complexity while enabling low-latency operation when both devices choose immediate feedback
3Adaptability or versatility
If delayed LMR feedback is used, then device availability flexibility is improved, but LMR exchange efficiency deteriorates due to extended time windows
Solution Approach 1:
The patent implements dynamic feedback type selection where each device can independently switch between immediate and delayed feedback modes based on its availability. This dynamic adaptation allows devices to optimize for flexibility when needed while maintaining efficiency when both devices are available, resolving the contradiction between adaptability and productivity
Solution Approach 2:
The patent uses feedback type indicators in LMR feedback frames to communicate each device's feedback mode to the other. This feedback mechanism allows devices to adapt their behavior based on partner availability, enabling efficient immediate feedback when possible and flexible delayed feedback when needed, thus balancing productivity and adaptability
Data Source
AI summary
This disclosure describes systems, methods, and devices related to a bidirectional location measurement report (LMR) feedback. A responding device may determine a first location measurement report (LMR) feedback type of an initiating device. The responding device may determine a second LMR feedback type of the responding device. The responding device may determine a common availability window, defined by a common start time and a common end time, for an exchange of a first LMR and a second LMR, wherein the common availability window is based on the first LMR feedback type and on the second LMR feedback type. The responding device may cause to send the first LMR to the initiating device during the common availability window. The responding device may identify the second LMR received from the initiating device during the common availability window.