Wireless Positioning Reference Signals With Nested RTT Timing
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in performing wireless signal transmission and reception procedures, particularly in positioning methods like multi-RTT, which are affected by clock errors and require significant resource usage.
Innovation Solution
A method involving multiple transmissions of a first type of reference signal and corresponding receptions of a second type of reference signal, utilizing a nested RTT structure to reduce the influence of clock errors and optimize resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reference signals are transmitted and received for positioning measurement, then positioning accuracy is improved, but resource consumption and procedure complexity increase
Solution Approach 1:
The patent implements a nested RTT measurement structure where a first RTT measurement procedure is embedded within a second RTT measurement procedure. The first device transmits a first reference signal and measures RTT, then transmits a second reference signal and measures another RTT, with both measurements nested within an overall positioning procedure. This nesting allows multiple measurements to be performed systematically, improving positioning accuracy while organizing the complexity in a structured manner that reduces procedural overhead.
2Measurement precision
If multiple reference signals are transmitted and received for positioning measurement, then positioning accuracy is improved, but resource usage increases
Solution Approach 1:
The patent combines multiple RTT measurement procedures into a unified nested structure. The first RTT measurement (involving first reference signal transmission and reception) and the second RTT measurement (involving second reference signal transmission and reception) are merged into a single coordinated procedure. This merging allows the system to perform multiple measurements using shared resources and timing references, reducing overall resource consumption compared to executing separate measurement procedures.
3Reliability
If nested RTT measurement structure is used, then clock error influence is reduced, but transmission and reception procedures become more complex
Solution Approach 1:
The patent performs preliminary RTT measurements before the final positioning calculation. The first RTT measurement is conducted and stored as preliminary data, then used in conjunction with the second RTT measurement. This preliminary action allows the system to establish a baseline measurement that can be combined with subsequent measurements, reducing the impact of clock errors through differential calculation while organizing the procedural complexity in a systematic sequence.
Data Source
AI summary
A method performed by a first device may comprise: receiving configuration information about a reference signal of a first type related to positioning; transmitting, a plurality of times, the reference signal in a time interval including a plurality of first time resources; and receiving, from the second device, a reference signal of a second type related to the positioning in one second time resource located after the time interval including the plurality of first time resources.