CSI-RS and CSI-IM Resource Configuration for Channel Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing mobile communication systems face challenges in efficiently measuring and transmitting channel state information using multiple active array antennas, leading to increased overhead and reduced system capacity due to excessive resource allocation for reference signals.
Innovation Solution
A method and apparatus for efficiently transmitting and receiving channel measurement information by configuring multiple channel state information reference signals (CSI-RS) and interference measurement resources, allowing terminals to measure and report channel state feedback effectively, thereby optimizing resource allocation and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple active array antennas are used for channel measurement, then channel state information accuracy is improved, but resource overhead increases
Solution Approach 1:
The patent divides the channel measurement process into two distinct phases: a first phase for measuring channel state information using CSI-RS resources, and a second phase for measuring interference using CSI-IM resources. This segmentation allows the system to obtain comprehensive channel state information while efficiently managing resource allocation by dedicating specific resources to specific measurement tasks, thereby reducing overall resource overhead.
Solution Approach 2:
The patent introduces a time dimension by configuring different measurement phases with different resource allocations. The first control message configures CSI-RS resources for channel measurement, while the second control message configures CSI-IM resources for interference measurement at different time instances. This temporal dimensioning allows the system to gather comprehensive channel state information without requiring all resources to be simultaneously available, thus reducing peak resource overhead.
2Productivity
If comprehensive channel measurement resources are allocated, then system capacity is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts the interference measurement function from the general channel measurement process by introducing a dedicated CSI-IM resource configuration through a second control message. This extraction allows the system to separately optimize channel state information acquisition and interference measurement, reducing the feedback overhead associated with transmitting comprehensive measurement data while maintaining system capacity through targeted measurements.
Solution Approach 2:
The patent creates a universal feedback mechanism that handles both channel state information and interference measurement results through a unified feedback process. The terminal device processes both CSI-RS and CSI-IM measurements and provides comprehensive feedback, allowing the base station to make informed scheduling decisions without requiring separate feedback channels, thus reducing overall feedback overhead while maintaining system capacity.
Data Source
AI summary
According to an embodiment of the present invention, provided are a method for receiving channel measurement information of a base station in a mobile communication system, including: transmitting, to a terminal, a first control message including a CSI-RS and a CSI-IM resource configuration information; transmitting, to the terminal, a second control message including at least one first information for a channel measurement and at least one second information for an interference measurement; and receiving, from the terminal, channel state feedback information measured on the basis of the first control message and the second control message. The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT).