User Equipment Frequency Domain Location Reporting in 5G Large Bandwidth Cells
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Solution Overview
Problem
In the 5G system, the use of large bandwidths makes it challenging for the UE to indicate its specific frequency domain location using only the cell ID, as the cell ID does not provide sufficient information about the UE's location within the frequency domain.
Innovation Solution
The UE is configured to record and report its frequency domain location information, which includes offsets relative to carrier frequencies, SS/PBCH block locations, and CSI-RS locations, allowing for more accurate location determination, especially in ultra-large bandwidth cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE uses only cell ID for information reporting, then the reporting process is simple, but the frequency domain location precision is insufficient
Solution Approach 1:
The frequency domain location information is segmented into multiple components: cell ID, offset value, and resource indicator. This segmentation allows each component to serve a specific function - cell ID for basic identification, offset value for frequency position, and resource indicator for resource allocation - thereby improving location precision while maintaining reporting efficiency
Solution Approach 2:
The patent introduces an additional dimension (offset value in frequency domain) to the traditional cell ID reporting mechanism. By adding this frequency domain offset dimension, the system transforms from one-dimensional cell identification to two-dimensional location identification (cell + frequency position), significantly improving frequency domain location precision without overly complicating the reporting process
2Measurement precision
If the UE reports detailed frequency domain location information, then the location precision is improved, but the signaling overhead increases
Solution Approach 1:
The patent applies local quality by making the detailed frequency domain location information reporting conditional rather than universal. The UE reports detailed information (offset value and resource indicator) only when configured by the network or when specific conditions are met, while using simplified reporting in other scenarios. This resolves the contradiction by providing high precision when needed while minimizing signaling overhead during normal operations
3Measurement precision
If the network configures UE to record frequency domain location, then the location accuracy is improved, but the device complexity increases
Solution Approach 1:
The network performs preliminary action by pre-configuring the UE with the necessary parameters and instructions for recording frequency domain location information before the UE actually performs the measurement and reporting. This preliminary configuration simplifies the UE's task during actual operation, as the UE only needs to follow pre-established rules rather than making complex decisions in real-time, thereby improving location accuracy without significantly increasing device complexity
Data Source
AI summary
An information reporting method, an information reporting configuration method, a user equipment and a network side device are provided. The information reporting method is applied to the user equipment and includes reporting information of a frequency domain location where the user equipment is located recorded by the user equipment and/or information of a frequency domain location where the user equipment is currently located.