Multi-Beam Phase-Coherent DL-PRS Allocation for Accurate UE Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently determining and utilizing phase coherent resources for accurate UE positioning, particularly in multi-beam wireless communication systems, leading to suboptimal positioning accuracy and performance.
Innovation Solution
A method and apparatus for generating and managing phase coherent DL-PRS resources by requesting, determining, and transmitting configuration messages between base stations and location management functions to ensure phase coherency, allowing for the generation of assistance data that identifies resources with consistent initial transmission phases, repetition values, and time gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase coherent resources are determined and utilized for UE positioning, then positioning accuracy is improved, but system complexity increases due to additional configuration management requirements
Solution Approach 1:
The patent introduces an intermediary configuration management mechanism where the location management function (LMF) coordinates between multiple base stations to establish phase coherent relationships. This intermediary layer handles the complexity of phase coherence configuration, allowing individual base stations to focus on transmitting positioning reference signals with consistent initial phases, thereby improving positioning accuracy without overwhelming individual devices with configuration complexity
Solution Approach 2:
The patent creates a universal configuration framework that can be applied across multiple base stations and positioning scenarios. The phase coherence configuration mechanism serves multiple functions: it establishes initial phase relationships, enables multi-beam positioning, and supports various positioning methods (OTDOA, DL-TDOA). This multi-functional approach consolidates complexity into a unified system-level solution rather than requiring separate mechanisms for each positioning scenario
2Measurement precision
If multiple base stations coordinate to provide phase coherent resources, then positioning measurement performance is improved, but communication overhead increases due to configuration message exchanges
Solution Approach 1:
The patent implements preliminary configuration actions where base stations and the LMF establish phase coherent relationships before actual positioning measurements occur. Configuration request and response messages are exchanged in advance to set up the phase coherent resource framework, including defining resource sets, repetition values, and time gaps. This preliminary setup eliminates the need for continuous coordination during positioning operations, reducing ongoing communication overhead while maintaining high measurement performance
Solution Approach 2:
The patent utilizes parameter-based configuration to efficiently manage phase coherent resources. By defining specific parameters such as initial phase relationships, resource repetition values, and time gap configurations, the system can precisely control phase coherence properties through compact message exchanges. These parameter changes allow the system to convey essential phase coherence information in a streamlined manner, minimizing communication overhead while ensuring accurate positioning measurements
Data Source
AI summary
Methods, systems, and apparatuses to provide phase coherent resources in multi-beam wireless communication systems. For example, a computing device generates a configuration request message for resources with phase coherency. The computing device also transmits the configuration request message to at least one base station. Further, the computing device receives a configuration response message from the at least one base station, where the configuration response message identifies a plurality of resources with phase coherency. The computing device then generates assistance data based on the plurality of resources with phase coherency. Further, the computing device transmits the assistance data, such as to one or more user equipment.