UE Positioning With Prioritized Beam Indices and SRS Signaling
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Solution Overview
Problem
Existing 5G technologies face challenges in accurately and quickly determining the position of User Equipment (UE) in Industrial Internet of Things (IIoT) environments, such as automated factories, due to limitations in beamforming and positioning accuracy and latency.
Innovation Solution
A method and apparatus that prioritize beam indices in time, frequency, or code domains for uplink transmissions to base stations, using sounding reference signals (SRSs) to enhance positioning accuracy and reduce latency by optimizing beam scanning and utilization of available bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamforming and standard 5G positioning technologies are used, then positioning coverage is provided, but positioning accuracy and speed are insufficient for IIoT applications
Solution Approach 1:
The system pre-determines and stores beam direction information associated with each cell ID before positioning is needed. When positioning is required, the terminal already has the beam direction data ready, eliminating the need for time-consuming beam scanning and enabling immediate high-accuracy positioning.
Solution Approach 2:
The patent introduces a new dimension of information by associating beam direction data with cell IDs. This additional dimension of pre-stored directional information enables the system to achieve both high accuracy and high speed positioning simultaneously, resolving the traditional trade-off between these two parameters.
2Measurement precision
If comprehensive beam scanning is performed to ensure accurate positioning, then positioning accuracy improves, but time delay increases
Solution Approach 1:
Beam direction information is determined and stored in advance for each cell ID. During positioning operations, this pre-stored information is directly utilized without requiring comprehensive beam scanning, thereby achieving high positioning accuracy while minimizing time delay.
3Reliability
If beam indices are not prioritized and full scanning is performed, then all directions are covered, but scanning time and latency increase
Solution Approach 1:
The patent applies local quality by prioritizing beam indices based on their directional relevance to the target cell. Instead of uniform treatment of all beams, the system selectively emphasizes beams in directions where cells are likely to exist, achieving reliable positioning with improved efficiency.
Solution Approach 2:
The system changes the parameter of beam index prioritization by ordering beam indices according to their directional probability of containing cells. This parameter change optimizes the scanning sequence, improving positioning efficiency while maintaining reliability through selective prioritization.
Data Source
AI summary
A terminal and a method thereof are provided for identifying positions of base stations in a wireless communication system. The method includes determining, from among a plurality of beam indices, first beam indices, based on directions of multiple cells; identifying whether to prioritize the first beam indices in a time domain, a frequency domain, or a code domain; and transmitting, to the multiple cells, sounding reference signals (SRSs), wherein in case that the first beam indices are prioritized in the time domain, the SRSs indicate the first beam indices using a starting slot of a subframe.