Virtual Cell Group Measurement for Wireless Terminal RLM
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Solution Overview
Problem
In wireless communication systems, User Equipment (UE) faces challenges in efficiently performing Radio Link Monitoring (RLM) and Radio Resource Management (RRM) due to frequent handover operations and Radio Link Failure (RLF) declarations caused by changes in channel states and interference from neighboring cells with different communication coverage areas.
Innovation Solution
A method where the UE receives information about a specific cell group, determines a representative value based on communication state indications from cells with the same virtual cell ID, and performs RRM or RLM using this value, allowing for cooperative communication and reducing unnecessary handover operations by treating cells with the same virtual ID as a single entity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs measurement and handover operations based on individual cells with different physical cell IDs, then the UE can accurately identify and switch between specific cells, but frequent handover operations and radio link failures occur due to channel state changes and interference from neighboring cells
Solution Approach 1:
The patent merges multiple cells with different physical cell IDs into a single cell group identified by a common virtual cell ID. The UE performs measurement and handover operations based on this virtual cell ID rather than individual physical cell IDs, treating the group of cells as a single entity. This reduces frequent handover operations and radio link failures caused by channel state changes and interference, as the UE maintains connection to the cell group rather than switching between individual cells.
2Loss of information
If the UE treats each cell with a different physical cell ID as a separate entity for measurement purposes, then detailed cell-specific measurement information is obtained, but signal overhead increases and measurement complexity increases
Solution Approach 1:
The patent combines measurement operations for multiple cells into a single unified measurement process based on the virtual cell ID. Instead of performing separate measurements and processing for each physical cell ID, the UE performs measurement on the cell group as a whole, reducing measurement processing complexity and signal overhead while maintaining the ability to identify and manage the cell group effectively.
Solution Approach 2:
The patent introduces a virtual cell ID as an abstract representation or copy of the physical cell IDs. This virtual identifier allows the UE to perform measurements and operations without directly processing multiple individual physical cell IDs, simplifying the measurement process while preserving the essential information needed for cell group identification and management.
3Ease of operation
If the UE performs RLM and RRM operations for each individual cell, then precise cell-specific resource management is achieved, but unnecessary handover operations occur due to interference from neighboring cells with different coverage areas
Solution Approach 1:
The patent merges RLM and RRM operations from individual cell level to cell group level using the virtual cell ID. The UE performs these operations once for the entire cell group rather than separately for each physical cell, reducing unnecessary handover operations triggered by interference from neighboring cells while maintaining adequate resource management precision at the group level.
Data Source
AI summary
The present invention relates to a method for enabling a terminal to perform a measurement in a wireless communication system. More specifically, the present invention comprises the steps of: receiving information related to a specific cell group as a measuring target; determining a representative value by performing the measurement for the specific cell group according to the received information; and performing radio resource management or radio link monitoring on the basis of the representative value, wherein the specific cell group is configured to enable a virtual cell identifier to comprise a plurality of equally set cells.