CSI-RS Configuration Aggregation for Wireless Resource Overhead
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) due to resource shortages and the need for high-speed data services, requiring advanced methods for CSI-RS resource aggregation and power transmission while minimizing overhead.
Innovation Solution
A method for receiving CSI-RS by user equipment (UE) involving CSI-RS configuration aggregation, efficient port numbering, and code division multiplexing (CDM) to achieve full power transmission and resource sharing with legacy UEs, allowing for seamless compatibility between new and legacy systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple legacy CSI-RS configurations are aggregated to design a larger number of ports, then the number of available CSI-RS ports is improved, but the overhead increases
Solution Approach 1:
The patent aggregates multiple legacy CSI-RS configurations (e.g., two 8-port configurations) to form a larger number of ports (e.g., 16 ports). By merging existing configurations rather than creating entirely new ones, the system increases port quantity while reusing established signal structures, thereby limiting overhead growth.
Solution Approach 2:
The aggregated CSI-RS configurations are designed to serve multiple functions: they support both legacy UEs (through shared configurations) and new UEs (through additional configurations). This multi-functionality allows the same resource structure to benefit multiple device types simultaneously, reducing the need for separate dedicated resources and thus lowering overall overhead.
2Power
If CDM-4 is configured for CSI-RS, then full power transmission is achieved, but resource allocation complexity increases
Solution Approach 1:
The patent applies CDM-4 (Code Division Multiplexing with 4 ports) to the aggregated CSI-RS configurations, changing the multiplexing parameter from traditional methods to CDM. This enables full power transmission by allowing all 4 ports to transmit simultaneously on the same time-frequency resources with orthogonal codes, rather than requiring time or frequency separation that would reduce power per port.
Solution Approach 2:
The patent introduces specific port numbering rules and resource allocation patterns as intermediaries that simplify the implementation of CDM-4. These standardized rules act as mediators between the complex CDM-4 mechanism and the actual resource allocation process, making the system manageable despite the underlying complexity.
3Adaptability or versatility
If legacy CSI-RS configurations are shared with legacy UEs, then compatibility with legacy systems is improved, but the number of available resources for new UEs is reduced
Solution Approach 1:
The patent segments the aggregated CSI-RS configurations into two groups: shared configurations (for legacy UE compatibility) and additional configurations (for new UE resources). For example, in a 16-port aggregation, some configurations are designated for sharing with legacy UEs while others are allocated exclusively to new UEs. This segmentation ensures both compatibility and sufficient resources for advanced features.
Solution Approach 2:
The patent extends the resource dimension by aggregating configurations across multiple legacy patterns, effectively adding a new dimension to resource availability. Instead of simply dividing existing resources, the system creates additional resource layers through aggregation, allowing legacy and new UEs to access different layers simultaneously without direct competition.
4Productivity
If different port numbering methods are used for shared and non-shared antenna ports, then resource reusage is improved, but system complexity increases
Solution Approach 1:
The patent applies different port numbering rules locally to different groups of antenna ports based on their sharing status. Shared antenna ports (first group) receive numbering optimized for legacy UE compatibility, while non-shared ports (second group) receive numbering optimized for new UE resource allocation. This localized differentiation enables efficient resource reusage without requiring a completely complex global numbering system.
Data Source
AI summary
A method for receiving a CSI-RS by a terminal in a wireless communication system according to an aspect of the present invention may comprise the steps of: receiving, from a base station, CSI-RS configuration information about a CSI-RS configuration to which the CSI-RS is mapped, wherein the CSI-RS configuration corresponds to merging of a plurality of legacy CSI-RS configurations, and the plurality of legacy CSI-RS configurations are mapped to a plurality of antenna ports numbered by corresponding legacy CSI-RS port numbers; and receiving the CSI-RS from the base station through the plurality of antenna ports on the basis of the CSI-RS configuration information.