CSI-RS Resource Positioning for Collision-Aware CSI Reporting
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Solution Overview
Problem
The inflexible scheduling and transmission of channel state information reference signals (CSI-RS) due to potential collisions with demodulation reference signals (DM-RS) in wireless communication systems, leading to reduced efficiency and performance in CSI reporting.
Innovation Solution
A method for flexibly indicating the position of CSI-RS resources and reporting parameters through configuration information, allowing for more efficient and flexible scheduling of CSI-RS by indicating the position and reporting format of CSI-RS resources, including CDM groups and time-frequency positions, to reduce collisions and optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of time-domain OFDM symbols occupied by CSI-RS is increased to improve CSI reporting accuracy, then measurement precision is improved, but the probability of collision with DM-RS increases, reducing reliability
Solution Approach 1:
The patent applies dynamics by making the CSI-RS time-domain position configurable and adjustable. The base station can dynamically select different OFDM symbol positions for CSI-RS transmission based on system conditions, avoiding fixed positioning that leads to collisions. This is achieved through configuration parameters that specify the time-domain position of CSI-RS resources, allowing the system to adaptively optimize CSI-RS placement to prevent overlaps with DM-RS while maintaining adequate symbols for accurate measurement.
2Device complexity
If the time-domain resource for CSI-RS is fixed to simplify scheduling, then device complexity is reduced, but scheduling flexibility is reduced, worsening adaptability
Solution Approach 1:
The patent applies parameter changes by introducing configurable parameters that define the time-domain position of CSI-RS resources. Instead of a fixed position, the system uses parameters such as the OFDM symbol index within a slot to specify CSI-RS timing. These parameters can be configured through RRC signaling or other control mechanisms, allowing the base station to adjust CSI-RS positioning according to traffic conditions, channel characteristics, and interference scenarios, thereby achieving both simplified implementation through parameterization and enhanced scheduling flexibility.
Data Source
AI summary
A channel state information reporting method, including: receiving configuration information, the configuration information includes first configuration information and second configuration information, the first configuration information is used to indicate a position of a channel state information reference signal resource, and the second configuration information is used to indicate a reporting parameter of channel state formation; receiving a channel state information reference signal according to the first configuration information; and reporting the channel state information according to the second configuration information and a measurement of the channel state information reference signal.