Inter-Frequency CSI-RS Measurement Configuration for 5G Handovers
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a need for improved inter-frequency measurements to facilitate seamless handovers between serving cells and candidate cells, as existing technologies face challenges in adapting reference signal configurations across different frequencies, affecting communication reliability.
Innovation Solution
A method and apparatus for user equipment (UE) to receive a configuration for performing inter-frequency measurements of synchronization signal blocks (SSB) or channel state information reference signals (CSI-RS) from a candidate cell while connected to a serving cell, allowing the UE to perform these measurements based on the received configuration and output an indication, thereby enabling connection and parameter adaptation for improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing reference signal configurations are used for inter-frequency measurements, then measurement capability is maintained, but adaptation to different frequency bands is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the reference signal configuration parameters to match the frequency characteristics of the target cell. The UE receives configuration information containing adjusted parameters (such as time resources, frequency resources, and signal type selections) that are optimized for inter-frequency measurements, enabling accurate channel state estimation across different frequency bands while maintaining reliable handover performance
2Measurement precision
If comprehensive inter-frequency measurements are performed, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent implements preliminary action by having the network side pre-configure measurement parameters and trigger mechanisms before handover occurs. The UE receives advance configuration information about the target cell's reference signals, including time resources and frequency resources, allowing the UE to perform measurements efficiently without delays during the actual handover decision process
Solution Approach 2:
The patent applies partial action by selecting and measuring only the most critical reference signal components necessary for handover decisions. The UE measures specific reference signals (such as SSB or CSI-RS) at strategically selected time and frequency resources, obtaining sufficient channel state information without performing exhaustive measurements across all possible parameters, thus balancing accuracy with time efficiency
Data Source
AI summary
A method of wireless communication at a UE is disclosed herein. The method includes receiving a configuration to perform an inter-frequency measurement of at least one of a SSB or a CSI-RS of a candidate cell while connected to a serving cell. The method includes performing the inter-frequency measurement on the at least one of the SSB or the CSI-RS from the candidate cell based on the received configuration. The method includes outputting an indication of the performed inter-frequency measurement.