Fine Timing Measurement Request for Indoor RTT
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Solution Overview
Problem
Current satellite positioning systems face challenges in accurately measuring round trip time (RTT) for indoor positioning, which is essential for enhanced location-based services in indoor environments, as existing methods are inefficient and require multiple messages to achieve accurate range measurements.
Innovation Solution
The method involves transmitting a fine timing measurement request message between wireless stations, allowing for the specification of parameters such as burst periods and minimum time between messages, enabling efficient RTT measurement by reducing the number of messages needed for accurate range calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional RTT measurement methods are used, then indoor positioning can be achieved, but the number of messages required is large and measurement efficiency is low
Solution Approach 1:
The patent combines multiple RTT measurement procedures into a single integrated message exchange. The fine timing measurement request message merges functionality previously requiring separate messages, allowing both devices to perform RTT measurements simultaneously through coordinated timestamp exchange, thereby reducing the total number of messages and improving measurement efficiency
Solution Approach 2:
The patent implements preliminary timing synchronization and parameter configuration before the actual RTT measurement. The fine timing measurement request message includes pre-configured parameters such as burst periods and minimum time between messages, allowing devices to prepare measurement windows in advance and reduce the time required for actual measurement execution
2Measurement precision
If multiple messages are exchanged for RTT measurement, then measurement accuracy can be improved, but message overhead and system complexity increase
Solution Approach 1:
The fine timing measurement request message serves multiple functions simultaneously: it initiates RTT measurement, configures measurement parameters, requests fine timing information, and establishes burst transmission patterns. This multi-functionality reduces the number of separate messages needed while maintaining measurement accuracy through comprehensive parameter specification
Solution Approach 2:
The patent introduces configurable parameters such as burst period and minimum time between messages that allow optimization of measurement accuracy without increasing message count. By adjusting these parameters, the system can achieve precise RTT measurements while controlling message overhead and simplifying the exchange protocol
Data Source
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AI summary
Disclosed are systems, methods and devices for obtaining round trip time measurements for use in location based services. In particular implementations, a fine timing measurement request message wirelessly transmitted by a first transceiver device to a second transceiver device may permit additional processing features in computing or applying a signal round trip time measurement. Such a signal round trip time measurement may be used in positioning operations.