Reference TRP Selection for Accurate New Radio Wireless Sensing
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining the location of devices and effectively performing sensing operations, particularly in environments with line-of-sight and non-line-of-sight transmission-reception points, which affect the precision of positioning and sensing measurements.
Innovation Solution
A method is introduced where a network entity identifies line-of-sight (LOS) and non-line-of-sight (NLOS) transmission-reception points (TRPs) based on a positioning report, selects a reference TRP for cooperative sensing, and communicates timing offsets and reference signals to user equipment (UE) for improved sensing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple TRPs are used for positioning and sensing operations, then positioning accuracy and sensing effectiveness are improved, but system complexity and TRP selection difficulty increase
Solution Approach 1:
The patent segments TRPs into distinct categories (LOS TRPs and NLOS TRPs) based on signal propagation characteristics. This segmentation allows the network entity to systematically evaluate and select reference TRPs by first filtering and categorizing all available TRPs, thereby managing complexity through structured classification while maintaining positioning accuracy.
Solution Approach 2:
The patent applies different evaluation criteria to different TRPs based on their local characteristics. LOS TRPs are evaluated based on signal strength and propagation quality, while NLOS TRPs are evaluated differently. This local quality approach enables optimized reference TRP selection by considering the specific properties of each TRP rather than treating all TRPs uniformly.
2Measurement precision
If LOS TRPs are selected as reference TRPs, then sensing operation accuracy is improved, but the number of available reference TRPs may be reduced
Solution Approach 1:
The patent performs preliminary filtering and classification of TRPs into LOS and NLOS categories before selecting reference TRPs. This preliminary action allows the system to pre-identify suitable reference TRPs and prepare multiple candidates, ensuring that when sensing operations are performed, there are sufficient LOS TRPs available for accurate measurements.
Solution Approach 2:
The patent introduces an intermediary filtering mechanism that evaluates TRP characteristics and mediates between the need for high accuracy (requiring LOS TRPs) and the need for sufficient reference points (requiring multiple TRPs). This intermediary layer processes TRP information and provides balanced reference TRP selections.
3Measurement precision
If filtering schemes are applied to determine LOS and NLOS TRPs, then reference TRP selection accuracy is improved, but processing time and computational complexity increase
Solution Approach 1:
The patent applies filtering schemes selectively rather than exhaustively. Instead of evaluating every possible TRP combination and propagation path, the system applies filters to identify and process only the most relevant TRPs (e.g., those with sufficient signal strength or known LOS characteristics). This partial action approach maintains selection accuracy while reducing processing time.
Data Source
AI summary
Disclosed are techniques for wireless communication. In some aspects, a network entity receives a positioning report from a user equipment (UE). The network entity transmits, to the UE, an indication of a reference transmission-reception point (TRP) for sensing operations based at least on the positioning report. In some aspects, a UE receives from a network entity, an indication of a reference TRP to use in a cooperative sensing scheme. The UE transmits a sensing measurement report including one or more measurements associated with time of arrivals (TOAs) of arrival paths of the reference TRP and one or more neighboring TRPs with respect to a reference time.