CSI Reporting Configuration Preservation During BWP Switch
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Solution Overview
Problem
Current CSI reporting mechanisms in next-generation wireless communication systems, such as 5G NR, are inadequate during BWP switch operations, as they do not ensure seamless compatibility and reliability.
Innovation Solution
A method and device for User Equipment (UE) to receive CSI reporting configurations and switch between Bandwidth Parts (BWPs) based on indications from the base station, automatically sending CSI reports without explicit activation commands after switching back to the original BWP, ensuring continuous CSI reporting compatibility with BWP switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE switches BWP according to BWP switch indication, then the UE can adapt to different bandwidth requirements, but the CSI reporting operation becomes inadequate or incompatible during BWP switch operation
Solution Approach 1:
The UE stores the CSI reporting configuration in advance before BWP switching occurs. When a BWP switch indication is received, the UE has already prepared the CSI reporting configuration from the original BWP, enabling seamless continuation of CSI reporting after switching to the new BWP without requiring reconfiguration.
Solution Approach 2:
The patent introduces an intermediary mechanism where the CSI reporting configuration is preserved and carried over during BWP transitions. This intermediary configuration acts as a bridge that maintains CSI reporting continuity across BWP boundaries, allowing the UE to report CSI on the new BWP using the stored configuration from the original BWP.
2Ease of operation
If the UE requires CSI reporting activation command after BWP switch, then the base station can control reporting timing, but the CSI reporting process becomes more complex and slower
Solution Approach 1:
The UE autonomously determines when to send CSI reports after BWP switching by utilizing the stored CSI reporting configuration. Instead of requiring explicit activation commands from the base station, the UE self-manages the CSI reporting process based on the preserved configuration, reducing control overhead and simplifying the interaction between UE and base station.
3Quantity of substance
If the UE releases CSI reporting configuration after BWP switch, then memory resources are freed, but CSI reporting cannot be continued on the new BWP
Solution Approach 1:
The UE recovers and reuses the CSI reporting configuration after BWP switching instead of discarding it. The configuration stored from the original BWP is recovered and applied to the new BWP, enabling continuous CSI reporting while efficiently utilizing existing configuration data without requiring additional memory resources for duplicate configurations.
Data Source
AI summary
A method performed by a BS for configuring CSI reporting is provided. The method includes transmitting a CSI reporting configuration to a UE on a first BWP; transmitting a first BWP switch indication to the UE on the first BWP, the first BWP switch indication being used to request the UE to switch to a second BWP; transmitting a second BWP switch indication to the UE after the UE switches from the first BWP to the second BWP, the second BWP switch indication being used to request the UE to switch back to the first BWP; and receiving a CSI report from the UE based on the CSI reporting configuration, without providing any CSI reporting activation command to the UE after the UE switches back to the first BWP according to the second BWP switch indication. A BS using the same is also provided.