L1 L2 Signaling for PRS Measurement Reporting
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Solution Overview
Problem
Current wireless communication systems, particularly in the transition to 5G, face challenges in efficiently reporting positioning measurements associated with positioning reference signals (PRSs) across communication nodes, leading to suboptimal positioning accuracy and increased latency due to reliance on higher-latency Layer-3 signaling.
Innovation Solution
Implementing Layer 1 (L1) or Layer 2 (L2) signaling for reporting positioning measurements between communication nodes, enabling faster and more efficient transmission of PRS-related data, thereby reducing latency and improving positioning computation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Layer-3 signaling is used for reporting positioning measurements, then the system maintains compatibility with existing wireless communication protocols, but the positioning latency increases and positioning accuracy deteriorates
Solution Approach 1:
The patent segments the positioning measurement reporting process by introducing separate L1 and L2 signaling paths alongside existing L3 signaling. This segmentation allows different reporting methods to coexist, enabling low-latency reporting through L1/L2 while maintaining protocol compatibility through L3, thus resolving the contradiction between reliability and time loss.
Solution Approach 2:
The patent introduces L1 and L2 signaling layers as intermediary channels between the UE and network for positioning measurement reporting. These intermediary signaling paths provide a faster route for measurement data transmission, reducing positioning latency while the existing L3 signaling pathway remains available for maintaining protocol compatibility and reliability.
2Reliability
If Layer-3 signaling is used for positioning measurement reporting, then protocol consistency is maintained, but positioning computation accuracy decreases
Solution Approach 1:
The patent divides the reporting mechanism into multiple segments (L1, L2, and L3 signaling paths), allowing the system to use L1/L2 for high-precision measurements requiring low latency while maintaining L3 for protocol consistency. This segmentation enables different accuracy requirements to be met through appropriate signaling path selection.
Solution Approach 2:
The patent changes the signaling layer parameter from exclusively L3 to include L1 and L2 options. By modifying the signaling layer parameter, the system can select the most appropriate path for each reporting instance, achieving higher measurement precision through L1/L2 when needed while preserving protocol consistency through L3 when appropriate.
3Loss of time
If faster positioning reporting is implemented, then positioning latency is reduced, but system complexity increases
Solution Approach 1:
The patent implements multi-functionality in the signaling system where L1 and L2 signaling paths are designed to handle positioning measurement reporting in addition to their existing functions. This universal approach allows the system to achieve faster positioning reporting without creating entirely new separate systems, thereby reducing the increase in overall system complexity.
Solution Approach 2:
The patent introduces dynamic signaling path selection capabilities, allowing the system to adaptively choose between L1, L2, or L3 reporting paths based on current positioning requirements, network conditions, and latency constraints. This dynamic approach optimizes positioning latency while managing system complexity through intelligent resource allocation rather than rigid additional infrastructure.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a first communication node (e.g., UE, BS, etc.) obtains one or more measurements associated with one or more PRSs (e.g., uplink PRS(s), downlink PRS(s), etc.) The first communication node transmits, to a second communication node (e.g., UE, BS, etc.) via L1 or L2 signaling, a report based on the one or more measurements. The second communication node receives the report and performs a position computing function based on the report.