Sidelink Positioning Measurement and Reporting for Wireless Networks
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Solution Overview
Problem
Current wireless communication technologies face challenges in defining effective measurement and reporting procedures for sidelink positioning, particularly in legacy new radio (NR) networks, where sidelink positioning reference signals (PRS) are transmitted independently of network or radio access technology coverage, necessitating new methods for positioning measurement and reporting between user equipment (UE) and network entities.
Innovation Solution
The proposed solution involves a processor-based UE system that performs positioning measurements using sidelink PRS transmissions and transmits reports to network entities, with features including anchor measurement lists, mapping relationships, and response timers to manage measurement configurations and errors, enabling efficient location information exchange and calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink positioning measurement procedures are defined for independent operation without network coverage, then positioning autonomy and versatility are improved, but measurement and reporting complexity increases
Solution Approach 1:
The positioning measurement procedure is segmented into distinct functional components: measurement configuration reception, SL-PRS signal measurement, report generation, and network entity coordination. This segmentation allows each component to be independently managed and optimized, reducing overall system complexity while maintaining positioning autonomy.
Solution Approach 2:
Measurement configurations are pre-defined and transmitted to UEs before actual positioning measurements are performed. This preliminary action includes setting up measurement parameters, thresholds, and reporting criteria in advance, which simplifies the real-time measurement process and reduces computational complexity during operation.
2Measurement precision
If multiple anchor UEs are involved in SL positioning measurements, then positioning accuracy is improved, but coordination overhead and system complexity increase
Solution Approach 1:
Multiple anchor UEs are merged into a coordinated measurement system where they collectively perform positioning measurements for a target UE. The network entity consolidates measurement results from multiple anchor UEs to compute the final position estimate, achieving high positioning accuracy while managing coordination through centralized control.
Solution Approach 2:
The network entity acts as an intermediary that coordinates between multiple anchor UEs and the target UE. It manages the measurement configuration distribution, collects measurement reports from anchor UEs, and computes the final positioning result, thereby reducing direct coordination overhead between UEs and simplifying the multi-UE interaction.
3Reliability
If detailed measurement configurations and mapping relationships are transmitted to UEs, then measurement precision and reliability are improved, but signaling overhead and processing complexity increase
Solution Approach 1:
Detailed measurement configurations and mapping relationships are extracted and pre-configured in the network entity before being selectively transmitted to UEs. Only the essential and necessary configuration parameters are signaled to UEs, while more detailed internal mappings remain in the network entity, reducing signaling overhead while maintaining measurement reliability.
Solution Approach 2:
The system dynamically adjusts measurement configuration parameters based on network conditions, UE capabilities, and positioning requirements. By changing parameters such as measurement thresholds, reporting intervals, and configuration detail levels, the system optimizes the balance between measurement reliability and signaling overhead for different operational scenarios.
Data Source
AI summary
Disclosed are methods and apparatuses for sidelink (SL) positioning measurement and reporting. An embodiment of the subject application provides a first user equipment (UE). The first UE includes: a processor configured to perform a positioning measurement procedure to obtain location information associated with the first UE based on SL positioning reference signal transmission(s) between the first UE and a set of second UEs; and a transmitter coupled with the processor and configured to transmit a first report to a network entity based on the positioning measurement procedure.