CSI Process Pairing for Dynamic Subframe Interference Measurement
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reporting channel status information (CSI) due to dynamic changes in wireless communication resource usage, particularly in LTE systems where existing methods struggle to effectively manage interference and signal measurement resources.
Innovation Solution
A method where user equipment configures multiple CSI processes through an upper layer, pairs them into CSI process units, calculates CSI using distinct signal and interference measurement resources, and reports these to the base station, allowing for dynamic resource usage changes by distinguishing between static and dynamic subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CSI processes are configured to handle dynamic resource usage changes, then the system can adapt to different subframe types (static and dynamic), but the complexity of managing and pairing CSI processes increases
Solution Approach 1:
The patent segments CSI processes into pairs, where each pair consists of a first CSI process and a second CSI process. Each process in the pair is configured with specific measurement resources (CSI-RS for signal measurement, CSI-IM for interference measurement). This segmentation allows independent configuration and management of each process while maintaining overall system adaptability through the pairing structure.
Solution Approach 2:
The patent creates a universal pairing structure that can handle both static and dynamic subframe types. The paired CSI processes are designed to work together, where the first process can be configured for static subframes and the second for dynamic subframes, or vice versa. This multi-functional pairing approach allows the same structural framework to adapt to different resource usage scenarios without requiring entirely separate management mechanisms.
2Measurement precision
If separate signal and interference measurement resources are used for each CSI process, then measurement precision is improved, but the quantity of resources required increases
Solution Approach 1:
The patent merges resource management at the pair level while maintaining separate measurement resources within each process. The first and second CSI processes in a pair each have their own CSI-RS and CSI-IM resources, ensuring measurement precision. However, the pairing structure allows for coordinated resource allocation and reporting, effectively managing the total resource quantity through structured combination rather than complete independence.
3Measurement precision
If CSI processes are paired with common signal measurement resource and different interference measurement resources, then interference measurement accuracy is improved for dynamic subframes, but the complexity of resource configuration increases
Solution Approach 1:
The patent applies local quality by configuring each CSI process with measurement resources appropriate to its specific function. The first CSI process may use interference measurement resources optimized for static subframes, while the second CSI process uses interference measurement resources optimized for dynamic subframes. Both processes in a pair share a common signal measurement resource (CSI-RS), but have different interference measurement resources (CSI-IM) tailored to their respective subframe types, achieving locally optimized measurement accuracy.
Data Source
AI summary
Disclosed is a method by which a terminal reports channel status information (CSI) to a base station in a wireless communication system. Particularly, the method comprises a step for setting a plurality of CSI processes through an upper layer, a step for pairing the plurality of CSI processes in two CSI process units; a step for calculating the CSI corresponding to each of the plurality of CSI processes by using a signal measurement resource and an interference measurement resource indicated by each of the plurality of CSI processes; and a step for reporting, to the base station, the CSI corresponding to each of the plurality of CSI processes, wherein the paired two CSI processes indicate a common signal measurement resource and interference measurement resources, which are different from each other.