FTM Responding Station Timing Control for Shared WLAN Resources
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Solution Overview
Problem
Existing wireless local-area networks face challenges in efficiently managing resources and response times due to devices using different communication protocols and hardware bandwidth limitations, particularly when operating with both newer and legacy protocols across multiple bands and channels.
Innovation Solution
A radio architecture that integrates WLAN and Bluetooth functionalities, utilizing a shared front-end module and radio IC circuitry to support both technologies, enabling efficient coexistence and resource management through a unified baseband processing system, supporting various IEEE 802.11 standards and modulation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple devices share the same wireless resources, then network capacity increases, but resource efficiency and response time deteriorate
Solution Approach 1:
The patent implements Fine Timing Measurement (FTM) protocols that precisely measure and control transmission timing parameters. By adjusting timing parameters such as measurement intervals, window sizes, and transmission schedules, the system optimizes resource allocation for each device, preventing collisions and reducing wait times even as device density increases.
Solution Approach 2:
The system employs bidirectional FTM measurements where devices exchange timing information and adjust their transmissions based on measured response times. This feedback mechanism allows dynamic optimization of resource allocation, with devices adapting their transmission schedules based on real-time network conditions and measured performance metrics.
2Adaptability or versatility
If devices operate with different communication protocols, then protocol compatibility increases, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent implements a universal FTM framework that operates across multiple IEEE 802.11 protocol versions (a, b, g, n, ac, ax). The measurement protocol is designed to be protocol-agnostic, using standardized timing exchanges that work regardless of the specific data transmission protocol being used, allowing legacy and modern devices to coexist in the same network.
Solution Approach 2:
The FTM measurement protocol acts as an intermediary layer between devices using different communication protocols. By establishing a standardized timing measurement framework that operates independently of data layer protocols, the system enables compatibility between diverse devices without requiring each device to implement complex protocol translation logic.
3Quantity of substance
If hardware bandwidth is limited, then device cost and power consumption decrease, but network throughput and response time decrease
Solution Approach 1:
The patent implements periodic FTM measurements with configurable intervals and window sizes. By spacing measurements periodically rather than continuously, the system reduces the bandwidth requirements for timing exchange while maintaining accurate response time measurements. Devices can adjust measurement frequency based on their hardware capabilities, allowing low-bandwidth devices to participate effectively.
Solution Approach 2:
The system allows devices to perform partial FTM measurements or use reduced-capability measurement modes when hardware bandwidth is limited. Rather than requiring full-duplex high-speed timing exchanges, the protocol supports simplified measurement sequences that achieve adequate timing accuracy with lower bandwidth requirements, enabling cost-effective device implementations.
Data Source
AI summary
Methods, apparatuses, and computer readable media for RSTA control for fine timing measurements, where an ISTA is configured to: encode, for transmission to an RSTA, an IFTMR frame, the IFTMR frame comprising a first vendor subelement, the first vendor subelement comprising a first availability window (AW) duration field indicating a first duration for AWs, and a first measurements per AW field indicating a first number of measurement attempts per AW, and decode, from the RSTA, in response to the IFTMR frame, an initial FTM frame, the initial FTM frame comprising a second vendor subelement, the second vendor subelement comprising a second AW duration field indicating a second duration for the AWs, and a second measurements per AW field indicating a second number of measurement attempts per AW, and perform the second number of measurement attempts per AW during an AW of the AWs, the AW having the second duration.