Non-Serving Cell CSI Report Configuration for 5G Handover
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently configuring channel state information reports for non-serving cell reference signals, which affects handover processes and beam management, leading to suboptimal performance in multi-cell environments.
Innovation Solution
A method and apparatus that enable a user equipment (UE) to receive a reference signal measurement configuration and report configuration from a serving cell, monitor and measure non-serving cell beams based on a transmission configuration indicator (TCI) state, and transmit beam reports to the serving cell, while a base station configures and receives these reports to manage channel state information effectively across cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel state information report configuration is implemented for non-serving cell reference signals, then handover performance and beam management are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent extends the existing channel state information report mechanism, originally designed for serving cells, to also support non-serving cells. This multi-functional approach allows the same reporting framework to handle both serving and non-serving cell measurements, improving handover performance without requiring entirely separate configuration systems.
Solution Approach 2:
The patent introduces separate configuration parameters for non-serving cell reference signal measurements, including reference signal resource configurations and measurement quantity configurations. This segmentation allows independent optimization of non-serving cell measurement procedures while maintaining the overall CSI reporting structure.
2Measurement precision
If comprehensive beam measurements are performed for both serving and non-serving cells, then mobility management accuracy is improved, but measurement and processing time increase
Solution Approach 1:
The patent enables selective measurement configuration where the UE can be instructed to measure and report on non-serving cell beams based on specific conditions and thresholds. This partial action approach allows the system to perform comprehensive measurements only when necessary for handover decisions, reducing overall measurement time while maintaining accuracy when needed.
Solution Approach 2:
The patent introduces reference signal resource configurations that are prepared in advance for non-serving cells. By pre-configuring the measurement resources and parameters, the UE can quickly perform measurements when handover conditions are met, reducing the actual measurement time during critical handover events.
3Measurement precision
If detailed reference signal measurement configuration is provided for non-serving cells, then channel state information accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent reuses existing CSI report configuration structures and parameters for non-serving cell measurements, allowing the same signaling framework to serve multiple purposes. This reduces the need for entirely new configuration messages while maintaining detailed measurement capabilities.
Solution Approach 2:
The patent introduces targeted configuration parameters specifically for non-serving cell reference signals, such as reference signal resource identifiers and measurement quantity configurations, only where needed in the configuration hierarchy. This localized enhancement provides detailed CSI accuracy for non-serving cells without unnecessarily complicating the entire configuration system.
Data Source
AI summary
The present disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for channel state information report configuration for non-serving cell reference signal. A user equipment may receive, from a serving cell, a reference signal (RS) measurement configuration and a RS report configuration associated with a non-serving cell. The UE also may monitor for a RS beam using a transmission configuration indicator (TCI) state associated with the non-serving cell based on the RS measurement configuration. The UE also may obtain one or more measurements of the RS beam associated with the non-serving cell. The UE also may transmit, to the serving cell, a beam report indicating the one or more measurements of the RS beam associated with the non-serving cell and beam measurements associated with a serving cell based on the RS report configuration.