CSI-RS Resource Setting for Flexible Channel State Information Acquisition
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Solution Overview
Problem
Conventional CSI acquisition schemes in legacy LTE do not support new technologies like semi-persistent and aperiodic CSI-RS transmission and reporting, which are essential for efficient precoding in 5G NR systems, leading to a gap in CSI acquisition methods for NR.
Innovation Solution
The proposed method introduces a new CSI process for NR that includes a resource setting, an IM setting, a CSI reporting setting, and a CSI measurement setting, allowing for periodic, aperiodic, and semi-persistent CSI-RS transmissions and reports, enabling more flexible and efficient CSI acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional CSI acquisition schemes from legacy LTE are used, then implementation simplicity is maintained, but support for new NR technologies like semi-persistent and aperiodic CSI-RS transmission is lost
Solution Approach 1:
The CSI acquisition scheme is divided into distinct components: resource setting, IM setting, CSI reporting setting, and CSI measurement setting. Each component can be independently configured for periodic, aperiodic, or semi-persistent operation, allowing flexible adaptation to NR requirements while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent introduces dynamic CSI acquisition modes including semi-persistent and aperiodic CSI-RS transmission and reporting. These dynamic modes allow the system to adapt CSI reporting behavior based on current channel conditions and traffic requirements, enabling efficient precoding in NR while the configuration framework maintains organizational simplicity.
2Productivity
If semi-persistent and aperiodic CSI-RS transmission are implemented, then precoding efficiency in NR is improved, but the complexity of CSI acquisition schemes increases
Solution Approach 1:
The CSI acquisition scheme is designed with universal configuration parameters that can support periodic, aperiodic, and semi-persistent transmission modes within a unified framework. The resource setting, IM setting, reporting setting, and measurement setting components can be configured with a single time-domain behavior parameter that determines the operation mode, reducing the need for separate configuration mechanisms for each mode and managing complexity while enabling efficient precoding.
3Reliability
If conventional CSI reporting settings are used, then configuration simplicity is maintained, but effective CSI reporting for aperiodic and semi-persistent transmissions is not achieved
Solution Approach 1:
The patent establishes a feedback mechanism where the UE reports CSI based on configured resource settings, IM settings, reporting settings, and measurement settings. The feedback configuration includes parameters that link CSI-RS resources with reporting resources and define the time-domain behavior, ensuring that CSI reporting is effectively triggered and configured for periodic, aperiodic, and semi-persistent transmissions while maintaining a unified configuration approach.
Data Source
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AI summary
A method of acquiring Channel State Information (CSI) in a wireless communication system includes transmitting, from a Base Station (BS) to a User Equipment (UE), a resource setting including time-domain behavior of CSI-Reference Signals (RSs) transmission that designates aperiodic, periodic, or semi-persistent; and transmitting, from the BS to the UE, the CSI-RSs based on the designated aperiodic, periodic, or semi-persistent. The resource setting includes precoding information that indicates whether precoders applied to the CSI-RSs is the same or different. The resource setting includes periodicity and a timing offset value of the CSI-RS transmission when the periodic or the semi-persistent is designated. The resource setting includes frequency-domain information that designates a wideband or a partial band used for the CSI-RS transmission. The resource setting includes a transmission bandwidth of the CSI-RS transmission when the partial band is designated.