Group Common DCI for Aperiodic PRS Triggering in 5G NR
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Solution Overview
Problem
In 5G New Radio (NR) mobile communication networks, there is a lack of defined methods for providing aperiodic Positioning Reference Signal (AP-PRS) triggering information to multiple User Equipments (UEs), which is necessary for accurate location determination using aperiodic PRS measurements.
Innovation Solution
The implementation of group common Downlink Control Information (DCI) for AP-PRS triggering, where information blocks containing trigger commands, positioning measurement requests, and location report requests are mapped to specific bits, allowing for efficient transmission of AP-PRS information to UEs, enabling them to measure and report AP-PRS from multiple Transmission and Reception Points (TRPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If aperiodic PRS triggering information is provided to multiple UEs, then location determination accuracy is improved, but there is no standardized method for efficient transmission of triggering information
Solution Approach 1:
The DCI message is segmented into multiple information blocks, where each block contains specific triggering information for different UEs or TRPs. This segmentation allows efficient organization and transmission of AP-PRS triggering information to multiple UEs without creating a complex unified message structure, thereby improving location determination accuracy while maintaining manageable system complexity.
2Productivity
If group common DCI is used for AP-PRS triggering, then transmission efficiency is improved, but information organization and mapping complexity increases
Solution Approach 1:
The group common DCI is divided into multiple information blocks, with each block containing specific AP-PRS triggering information. This segmentation enables efficient transmission to multiple UEs while organizing information in a structured manner that reduces the complexity of information mapping and processing.
Solution Approach 2:
Different information blocks within the group common DCI are designed with different structures and contents tailored to specific UEs or TRPs. This local differentiation allows each UE to efficiently process only its relevant information while maintaining overall transmission efficiency across the group.
3Adaptability or versatility
If multiple information blocks are mapped to DCI bits, then AP-PRS information coverage is improved, but bit mapping complexity increases
Solution Approach 1:
AP-PRS information is divided across multiple information blocks, each mapped to specific bit fields within the DCI message. This segmentation enables comprehensive coverage of triggering information for multiple UEs and TRPs while organizing the bit mapping in a systematic way that reduces overall complexity.
Solution Approach 2:
The information block structure is designed to be universal and adaptable, allowing the same DCI format to carry different types of AP-PRS triggering information for different UEs and TRPs. This multi-functionality improves information coverage without requiring separate DCI structures for each scenario, thereby managing bit mapping complexity.
Data Source
AI summary
Group common Downlink Control Information (DCI) for Aperiodic Positioning Reference Signal (AP-PRS) triggering is described herein. Embodiments for such AP-PRS may include AP-PRS triggering commands and/or positioning measurement request commands, and may be mapped to one or more bits of different blocks of the group common DCI to identify different aspects of the AP-PRS, such as one or more Positioning Frequency Layers (PFLs), PRS identifiers (PRS-IDs), PRS resource sets, and/or PRS resources.