Channel State Information Measurement in Coordinated Multipoint Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current channel state information measurement methods in coordinated multipoint scenarios, such as those in future 5G networks, fail to meet diverse requirements and efficiently trigger and report CSI, particularly in scenarios involving non-zero power and zero power CSI-RS, limiting the ability to measure and manage channel state information effectively.
Innovation Solution
A method and apparatus for channel state information measurement that allows user equipment to measure and report CSI based on signal-to-interference-plus-noise ratio (SINR) using non-zero power reference signals, enabling the measurement of channel and interference powers, and reporting multiple CSI components to facilitate better scheduling and coordination among base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-zero power CSI-RS and zero power CSI-RS are used for channel and interference measurement respectively, then channel state information measurement can be performed, but the measurement method cannot meet diverse requirements in different coordinated multipoint scenarios
Solution Approach 1:
The patent introduces dynamic configuration where the network device can flexibly indicate different measurement attributes (channel measurement or interference measurement) for the same CSI-RS resource through signaling. This allows the measurement system to adapt dynamically to different coordinated multipoint scenarios (joint transmission, coordinated scheduling, dynamic point selection) without requiring separate fixed measurement methods for each scenario.
Solution Approach 2:
The patent enables a single CSI-RS resource to serve multiple functions by allowing it to be configured for either channel measurement or interference measurement based on network indication. This multi-functionality resolves the limitation of the traditional approach where NZP CSI-RS and ZP CSI-RS had fixed, separate roles, thereby improving adaptability across different coordinated multipoint scenarios while maintaining measurement precision.
2Productivity
If multiple pieces of CSI are reported by user equipment for coordinated multipoint scenarios, then better scheduling and coordination can be achieved, but the complexity of triggering and reporting multiple CSI increases
Solution Approach 1:
The patent segments the CSI reporting process into distinct components (channel measurement CSI and interference measurement CSI) that can be independently configured and triggered. The network device can selectively trigger different CSI reports based on specific coordinated multipoint scenarios, reducing the complexity of managing multiple CSI pieces by organizing them into manageable segments with clear purposes.
Solution Approach 2:
The patent implements a feedback mechanism where the network device indicates measurement attributes to the user equipment, and the user equipment reports CSI based on these indications. This structured feedback loop allows for efficient triggering and reporting of multiple CSI pieces by providing clear guidance on what to measure and report, thereby improving scheduling efficiency while managing reporting complexity.
3Measurement precision
If traditional CSI measurement methods are used, then implementation is simple, but the accuracy and sufficiency of CSI reporting is insufficient for optimal interference management
Solution Approach 1:
The patent changes the measurement parameters by introducing configurable measurement attributes (channel measurement or interference measurement) that can be dynamically adjusted based on network conditions and coordinated multipoint scenarios. This allows for improved CSI reporting accuracy by selecting appropriate measurement types, while the parameter configuration mechanism manages the complexity through standardized signaling procedures.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Embodiments of the present invention provide a channel state information measurement method, including: receiving, by user equipment, configuration information for channel state information measurement from a radio network device, where the configuration information includes information about a resource for channel state information measurement and indicates information about a measurement attribute of the resource, and the measurement attribute includes channel measurement, or X types of interference measurement, or channel measurement and X types of interference measurement, where X is an integer greater than or equal to 1; and measuring, by the user equipment, channel state information based on the configuration information, and feeding back the channel state information. The method is intended to meet different requirements for channel state information measurement in different scenarios of coordinated multipoint in a future network.