Aperiodic CSI-RS Resource Reuse via Dynamic ZP Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing Channel State Information (CSI) Reference Signals (RS) due to the increasing demand for higher data transfer rates and resource reuse, particularly in scenarios where aperiodic beamformed CSI-RS transmission is not feasible.
Innovation Solution
The proposed solution involves an operation method for user equipment (UE) in wireless communication systems, where UE receives higher layer signaling for aperiodic beamformed CSI-RS transmission, measures the CSI-RS, and reports the results to the base station, while also utilizing dynamic Zero Power (ZP) CSI-RS indication to reuse resources when aperiodic beamformed CSI-RS is not transmitted, allowing for efficient PDSCH resource mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aperiodic beamformed CSI-RS transmission is implemented to support higher data transfer rates, then system capacity and transfer rate increase, but terminal implementation complexity increases
Solution Approach 1:
The patent changes the transmission parameter from periodic to aperiodic CSI-RS, allowing the system to adaptively adjust reference signal transmission based on actual channel conditions and traffic requirements. This enables higher data transfer rates when needed while reducing overhead when not needed, resolving the contradiction between productivity and complexity.
Solution Approach 2:
The patent introduces dynamic ZP CSI-RS indication that allows the system to dynamically indicate when CSI-RS is not transmitted, enabling the terminal to adaptively adjust its processing behavior. This dynamic mechanism allows the terminal to reduce complexity by skipping measurements when CSI-RS is not present, while still supporting high data rates when CSI-RS is transmitted.
2Measurement precision
If resources are allocated for aperiodic beamformed CSI-RS transmission, then channel state information accuracy improves, but resource reuse efficiency decreases
Solution Approach 1:
The patent applies partial action by introducing ZP CSI-RS indication that allows the system to transmit CSI-RS only when necessary for accurate channel state information. When traffic conditions or channel conditions do not require precise CSI, the system can skip transmission and reuse resources for PDSCH, thus achieving resource reuse efficiency while maintaining measurement precision when needed.
Solution Approach 2:
The patent changes the resource allocation parameter dynamically based on traffic conditions and channel quality. By using aperiodic transmission with dynamic indication, the system can switch between allocating resources for CSI-RS (when measurement precision is needed) and reusing resources for PDSCH (when resource efficiency is prioritized), resolving the contradiction between measurement precision and resource quantity.
Data Source
AI summary
The present invention provides an operation method of an user equipment in relation to CSI-RS in a wireless communication system.Particularly, an operation method performed by a user equipment (UE) according to the present disclosure includes receiving a higher layer signaling including resource configuration information related to an aperiodic transmission of beamformed CSI-RS from a base station (BS); receiving a first DCI format including first control information indicating that there is an aperiodic transmission of the beamformed CSI-RS from the BS; measuring the beamformed CSI-RS based on the received resource configuration information; and reporting a measurement result of the beamformed CSI-RS to the BS.