Aggregated CSI-RS Resource Configuration for Wireless Terminals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) due to increased data traffic and the need for high-speed services, requiring advanced methods to manage resource allocation and channel measurement effectively.
Innovation Solution
A method for reporting CSI in wireless communication systems involves receiving CSI-RS resource information from a base station, aggregating legacy CSI-RS resources, and configuring CSI-RS resources using frequency division multiplexing (FDM) and code division multiplexing (CDM techniques across multiple antenna ports, allowing for full power transmission and flexible resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If legacy CSI-RS resources are aggregated to form new CSI-RS resources for 8 antenna ports, then full power transmission is enabled and measurement precision is improved, but device complexity increases due to the need to aggregate and manage multiple legacy resources
Solution Approach 1:
The patent combines multiple legacy CSI-RS resources (each supporting 4 antenna ports) into a single aggregated CSI-RS resource that supports 8 antenna ports. This merging approach allows the system to achieve full power transmission across 8 antenna ports while reusing existing legacy resource structures, thereby improving measurement precision without requiring entirely new resource configurations from scratch.
Solution Approach 2:
The aggregated CSI-RS resource structure is designed to be universal, where the same resource configuration can serve multiple antenna port groups (e.g., ports 0-3 and 4-7). This multi-functionality allows a single resource to support both 4-port and 8-port operations, reducing the need for separate dedicated resources and managing complexity through reuse.
2Productivity
If frequency division multiplexing is used for antenna port groups, then resource allocation flexibility is improved and productivity increases, but loss of time increases due to the need for additional configuration signaling
Solution Approach 1:
The patent performs preliminary configuration of antenna port groupings and FDM/CDM patterns through higher-layer signaling before actual CSI-RS transmission begins. By pre-configuring the aggregation structure and multiplexing patterns, the system eliminates the need for time-consuming dynamic reconfiguration during operation, thereby improving productivity while minimizing time loss.
3Adaptability or versatility
If code division multiplexing is applied within antenna port groups, then adaptability is improved for various antenna configurations, but device complexity increases due to additional multiplexing management requirements
Solution Approach 1:
The patent segments the 8 antenna ports into two distinct groups (ports 0-3 and ports 4-7), each independently configured with CDM patterns. This segmentation allows flexible adaptation to different antenna configurations (e.g., activating only certain port groups) while managing complexity through modular, independent configuration of each segment rather than treating all 8 ports as a single complex unit.
Data Source
AI summary
According to one aspect of the present invention, a method for reporting channel state information (CSI) of a terminal in a wireless communication system comprises the steps of: receiving, from a base station, channel state information-reference signal (CSI-RS) resource information on a CSI-RS resource to which a CSI-RS is mapped; receiving the CSI-RS from the base station on the basis of the received CSI-RS resource information, by using at least one antenna port; and reporting, to the base station, the CSI generated on the basis of the received CSI-RS, wherein the CSI-RS resource can be configured by aggregating a plurality of legacy CSI-RS resources.