Terminal Mobility History Reporting in Multi-Beam Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately estimating the mobility of user equipment (UE) due to limited reporting of detailed mobility history, particularly in multi-beam environments where traditional cell-based reporting is insufficient for precise location estimation.
Innovation Solution
A method and apparatus for UE to report mobility history by updating and transmitting identification information and stay time for beams, transmission reception points (TRPs), and cells, using specific reference signal IDs, allowing the network to accurately estimate UE mobility by recording detailed mobility history whenever the UE changes beams or TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cell-based reporting is used, then the system is simple to operate, but location estimation accuracy deteriorates in multi-beam environments
Solution Approach 1:
The patent segments the mobility history reporting by dividing it into multiple granularity levels: cell-level information (cell ID, cell stay time) and beam-level information (beam ID, beam stay time). This segmentation allows the network to receive detailed location data without overwhelming complexity, as each level can be processed independently based on specific needs.
Solution Approach 2:
The patent adds a new dimension to traditional mobility reporting by introducing beam-level granularity alongside the conventional cell-level reporting. This dimensional expansion transforms the reporting structure from a single-level cell-based system to a multi-level hierarchical system that includes both cell and beam identifiers with their respective stay times.
2Measurement precision
If detailed mobility history is reported, then location estimation accuracy is improved, but information processing load increases
Solution Approach 1:
The patent implements partial reporting by allowing the UE to selectively report mobility history based on configuration parameters. The network can request only essential information (cell-level) or additional details (beam-level) depending on the specific scenario, avoiding unnecessary data transmission and processing overhead.
Solution Approach 2:
The reporting mechanism is made dynamic through configurable parameters that allow the network to adjust the level of detail required. The UE can switch between reporting only cell information, only beam information, or both levels depending on network configuration and current mobility patterns, optimizing the balance between accuracy and data volume.
Data Source
AI summary
Disclosed are a method by which a terminal reports a mobility history, and an apparatus for supporting the same. The method comprises the steps of: updating, according to a movement of the terminal, a mobility history including identification information on a beam in which the terminal has stayed and a stay time in the beam; allowing the terminal to enter an RRC connection state; and transmitting the stored identification information and the stay time to a network.