CSI-RS Mapping for 12-Port and 16-Port Configurations
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Solution Overview
Problem
The existing LTE system is limited to configuring only 2, 4, or 8 ports for CSI-RS, unable to support higher port configurations such as 12 or 16 ports, which restricts channel measurement and estimation capabilities.
Innovation Solution
A method and device for reference signal mapping that generates 12-port or 16-port CSI-RS patterns by determining the positions of Resource Elements (REs) based on existing 2-port, 4-port, and 8-port patterns, allowing for resource mapping operations to achieve these higher port configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing 2-port, 4-port, or 8-port reference signal patterns are used, then the system maintains compatibility with current LTE standards, but the system cannot support 12-port or 16-port CSI-RS configurations
Solution Approach 1:
The patent segments the 12-port or 16-port reference signal pattern into multiple component patterns (e.g., combining 8-port and 4-port patterns, or multiple 2-port patterns). Each component pattern follows existing LTE standards, while their combination achieves the higher port configuration. This segmentation allows the system to support 12-port or 16-port CSI-RS without requiring entirely new pattern designs.
Solution Approach 2:
The patent merges multiple existing reference signal patterns (2-port, 4-port, or 8-port patterns) to construct 12-port or 16-port patterns. By combining these standardized component patterns according to specific rules, the system achieves higher port flexibility while maintaining compatibility with existing LTE infrastructure and reducing the complexity of designing entirely new patterns.
2Measurement precision
If 12-port or 16-port CSI-RS mapping is implemented, then channel measurement and estimation capabilities are enhanced, but the resource element positioning and mapping complexity increases
Solution Approach 1:
The patent segments the resource mapping process into determining RE positions based on component patterns and then performing mapping operations on each segment. This approach enhances channel measurement precision through 12-port or 16-port configurations while managing mapping complexity by breaking down the process into standardized, reusable steps.
Solution Approach 2:
The patent performs preliminary determination of RE positions using established 2-port, 4-port, or 8-port patterns before executing the actual resource mapping operation. This preliminary action simplifies the subsequent mapping process and reduces overall complexity while enabling enhanced 12-port or 16-port channel measurement capabilities.
3Measurement precision
If the system supports only 2, 4, or 8 ports for CSI-RS, then the reference signal pattern design remains simple, but the channel measurement capability is limited
Solution Approach 1:
The patent creates a universal reference signal pattern construction method that can generate 12-port or 16-port patterns from existing 2-port, 4-port, or 8-port component patterns. This multi-functional approach enhances channel measurement capability for higher port configurations while maintaining adaptability to different antenna setups and use cases.
Solution Approach 2:
The patent extends the port dimension from traditional 2, 4, or 8 ports to 12 or 16 ports by combining multiple component patterns. This dimensional extension enhances channel measurement capability for massive MIMO scenarios while building upon existing standardized patterns rather than creating entirely new structures.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3A~3B
AI summary
A reference signal mapping method and a reference signal mapping device are provided. The reference signal mapping method includes steps of: determining a position of a RE to which a CSI-RS has been mapped in accordance with an N-port reference signal pattern, N being equal to 12 or 16; and performing a resource mapping operation on the CSI-RS in accordance with the determined position of the RE. The position of the RE to which the CSI-RS has been mapped in the N-port reference signal pattern being determined in accordance with a position of the RE to which the CSI-RS has been mapped in one or more of a 2-port reference signal pattern, a 4-port reference signal pattern and an 8-port reference signal pattern. As a result, it is able to achieve the 12-port or 16-port CSI-RS mapping, thereby to achieve the 12-port or 16-port CSI-RS transmission.