DL-AoD Beam Response Reporting for UE Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in accurately determining the downlink angle of departure (DL-AoD) for user equipment (UE) positioning due to angular spread of beams, which affects position accuracy and requires efficient beam response reporting mechanisms to optimize beamforming.
Innovation Solution
A method involving a network entity that requests and receives beam response reports from base stations, incorporating UE location information to select appropriate downlink AoDs, adjust beam numbers and granularity based on UE distance, and provide optimized beam information to UEs for improved positioning and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam response reports include detailed beam information for all beams, then positioning accuracy is improved, but signaling overhead increases
Solution Approach 1:
The beam response report is segmented into multiple parts based on beam properties. Only beams with specific characteristics (e.g., high signal strength, relevant angular directions) are included in the report, while beams with insufficient or irrelevant information are excluded. This segmentation allows the UE to provide positioning-relevant beam information without transmitting all possible beam data, thereby reducing signaling overhead while maintaining positioning accuracy.
Solution Approach 2:
Different beams are treated differently based on their local characteristics. The network entity filters and selects beams based on their specific properties (signal strength, angular orientation, coverage area) to create a customized beam response report. This local quality approach ensures that only beams with relevant characteristics for the current positioning scenario are included, optimizing the balance between accuracy and overhead.
2Measurement precision
If the network requests beam response reports from all base stations, then positioning accuracy is improved, but network complexity increases
Solution Approach 1:
The network entity performs preliminary filtering and selection of base stations before requesting beam response reports. Based on UE location information, the network pre-determines which base stations are most relevant for positioning and only sends request messages to those selected base stations. This preliminary action reduces the number of base stations the UE must query, thereby reducing network complexity while maintaining positioning accuracy through selective data collection.
3Ease of manufacture
If beamforming uses fixed beam patterns, then implementation simplicity is maintained, but spectral efficiency decreases
Solution Approach 1:
The beamforming system transitions from fixed beam patterns to dynamic beam selection. The network entity and UE collaboratively determine the optimal beam direction and pattern based on real-time conditions including UE location, channel characteristics, and traffic requirements. This dynamic adaptation allows the system to optimize spectral efficiency by selecting beams that best match current operational needs while maintaining implementation simplicity through automated beam selection procedures.
Data Source
AI summary
Method and apparatus for beam information in downlink AoD positioning with UE positioning. The apparatus sends a first request, to at least one base station, for a beam response report based on at least a first location information. The first request includes the first location information with respect to the at least one base station. The apparatus sends a second request, to the at least one base station, for a beam response report based on at least a second location information. The second request includes the second location information with respect to the at least one base station. The apparatus receives, from the at least one base station, one or more beam response reports comprising beam response information of one or more transmission beams of the at least one base station corresponding to at least the first location information and the second location information.