CSI Resource Configuration for Wireless Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing configuration of CSI-RS and CSI-IM resources in wireless communication systems is inefficient, leading to high overhead waste and limited support for all interference hypotheses, especially in complex network deployments, and is not scalable with changes in sector configuration.
Innovation Solution
Configuring CSI resources such that each sector uses the same CSI-IM resources but different CSI-RS resources, allowing each CSI process to specify the use of the same CSI-IM resources as other processes and different CSI-RS resources, enabling efficient channel state information acquisition and scalable configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each sector is configured with dedicated CSI-RS resources and separate CSI-IM resources for each CSI process, then channel quality measurement accuracy is improved, but resource overhead increases significantly
Solution Approach 1:
The patent merges CSI-IM resources across multiple CSI processes by configuring a single set of CSI-IM resources that are shared by all CSI processes. This combining approach reduces the total number of CSI-IM resources required, thereby reducing resource overhead while maintaining the ability to measure interference for multiple hypotheses. The network node configures CSI-IM resources once at the cell level rather than duplicating them for each CSI process.
2Adaptability or versatility
If multiple CSI processes are configured to support all interference hypotheses, then coordination hypothesis coverage is improved, but device implementation complexity increases
Solution Approach 1:
The patent implements universality by designing a single CSI-IM resource configuration that serves multiple CSI processes and multiple interference hypotheses simultaneously. This multi-functional approach allows the same CSI-IM resources to be used across different CSI processes, reducing the need for separate interference measurement resources for each hypothesis. The system achieves versatile hypothesis coverage through a unified resource configuration that can be adapted to multiple scenarios.
3Measurement precision
If CSI resources are configured for each sector independently, then sector-specific measurement accuracy is improved, but scalability to changing sector configurations is reduced
Solution Approach 1:
The patent applies segmentation by separating CSI-RS resources (which remain sector-specific and dedicated) from CSI-IM resources (which are shared and common across sectors). This segmentation allows sector-specific channel measurement accuracy to be maintained through dedicated CSI-RS, while scalability is achieved through the shared CSI-IM resources that can be reused across different sector configurations. When sectors are added or removed, only the CSI-RS configuration needs to change, while the CSI-IM resources remain valid.
Data Source
AI summary
The disclosure relates to a method performed in a network node of a communication system for configuring a communication device with channel state information, CSI, resources. The method comprises: configuring CSI resources for at least two sectors, the CSI resources comprising CSI reference signal, RS, resources and CSI interference measurements, IM, resources, such that the sectors are configured with same CSI IM resources, and such that each of the sectors is configured with CSI RS resources differing from the other sectors; and configuring the communication device to use a respective CSI resource configuration for each of at least two CSI processes, wherein each CSI resource configuration defines resources corresponding to resources of the configuring of a respective sector, whereby each CSI process specifies use of same CSI IM resources as the other CSI processes and CSI RS resources different from the other CSI processes.