6GHz Client-to-Client FTM Positioning for Indoor Coverage
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Solution Overview
Problem
Current methods for enabling 6GHz client-to-client (C2C) operation in indoor environments face limitations due to the reliance on Received Signal Strength Indication (RSSI) for location verification, which is inaccurate and restrictive, especially in enterprise settings where devices are mobile and battery-powered, and require association with an Access Point (AP), limiting coverage and management capabilities.
Innovation Solution
The implementation of Fine Timing Measurement (FTM) technology allows for precise indoor positioning of devices within a building, enabling direct placement and independent evaluation of device position, and facilitates channel selection and power control through over-the-air signaling, allowing APs to manage spectrum and eliminate the need for pre-existing trust relationships or specific proximity requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSSI-based location verification is used for 6GHz C2C operation, then device positioning can be achieved, but the accuracy is insufficient and coverage is restricted
Solution Approach 1:
The patent changes the measurement parameter from RSSI (Received Signal Strength Indication) to FTM (Fine Timing Measurement). FTM measures the time of flight of signals between devices, providing more accurate distance and location verification. This parameter change resolves the contradiction by improving measurement precision while expanding coverage availability, as FTM does not rely on signal strength thresholds that limit RSSI-based operation.
2Ease of operation
If association with Access Point is required for 6GHz C2C operation, then network management can be simplified, but mobile battery-powered devices are limited in operation
Solution Approach 1:
The patent segments the network management function by introducing a lightweight discovery and verification mechanism that operates independently of full AP association. Devices can perform FTM-based location verification and establish C2C connections without completing the traditional association process, allowing battery-powered mobile devices to operate flexibly while APs maintain management capability through optional verification.
Solution Approach 2:
The FTM mechanism serves multiple functions: it enables accurate location verification for security, provides distance measurement for channel allocation, and allows operation without full association. This multi-functionality resolves the contradiction by maintaining network management capability while enabling flexible operation for mobile devices.
3Reliability
If pre-existing trust relationships are required for 6GHz C2C operation, then security can be maintained, but device compatibility and network entry are restricted
Solution Approach 1:
The patent implements preliminary FTM-based location verification as a trust-establishment mechanism before full C2C operation begins. By measuring distance and verifying location constraints upfront, the system establishes security trust without requiring pre-existing trust relationships or credentials. This preliminary action resolves the contradiction by providing security assurance while enabling broad device compatibility.
Data Source
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AI summary
This disclosure describes systems, methods, and devices related to C2C using fine timing measurement (FTM). A device may cause to enable 6GHz client to client (C2C) using a range measurement. The device may determine locations of client station devices (STAs) within an indoor environment based on the range measurement to located access points (APs).