Beam Group Management for NR Cell Switching
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Solution Overview
Problem
In new radio (NR) communication systems, the use of high frequencies results in reduced coverage due to path loss and penetration loss, necessitating a multi-beam transmission method for reference signals. However, this complexity complicates cell switching decisions, as multiple beams and varying signal strengths make it unclear which signal to measure and how to formulate switching criteria.
Innovation Solution
A method for managing beam groups is introduced, where multiple beams are divided into beam groups, and downlink transmission content is transmitted via selected beams within these groups. The terminal is informed of parameter information for each beam group, allowing it to calculate cell measure quality and select a target cell based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple beams are used for transmission in NR, then coverage is expanded, but device complexity increases due to the need to manage multiple beams and formulate switching criteria
Solution Approach 1:
The patent segments multiple beams into distinct beam groups, where each group is associated with a specific cell. This segmentation allows the terminal to manage beams in an organized manner by group rather than individually, reducing the complexity of beam management while maintaining the coverage expansion benefits of multiple beams
Solution Approach 2:
The patent introduces beam groups as an intermediary layer between individual beams and cells. The beam group serves as a mediator that simplifies the relationship between multiple beams and the terminal, providing a structured framework for beam selection and cell switching decisions
2Area of stationary object
If multiple beams are transmitted for reference signals, then coverage is improved, but measurement precision becomes difficult as it is unclear which signal to measure
Solution Approach 1:
By segmenting beams into groups associated with specific cells, the patent enables the terminal to precisely measure signals within each beam group context. The terminal can accurately determine which beam group to measure based on cell associations, improving measurement precision despite the presence of multiple beams
Solution Approach 2:
The patent applies local quality by assigning specific characteristics to each beam group, including cell associations and downlink transmission content. This allows the terminal to perform targeted measurements on relevant beam groups, improving the precision of signal measurements by focusing on locally relevant beams
3Ease of operation
If beam groups are introduced to manage multiple beams, then ease of operation improves for cell switching, but device complexity increases due to additional beam group management
Solution Approach 1:
The patent merges the concepts of beam management and cell management by associating beam groups with specific cells. This merging allows the terminal to perform cell switching operations by selecting beam groups, simplifying the operation process while maintaining organized beam management through the cell-beam group association
Data Source
AI summary
A method for managing beam groups performed by a terminal, a terminal, and an apparatus are provided. The method includes the following. Receive at least one of received signal strength deviation value or received signal quality deviation value from a base station. Assign multiple beams into at least one beam group based on the at least one of received signal strength deviation value or received signal quality deviation value.