CSI Reporting Groups for Carrier Aggregation Collision Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems with enhanced carrier aggregation, the increasing number of component carriers leads to frequent collisions in channel state information (CSI) reports, degrading the communication link due to limited reporting capacity and prioritization challenges.
Innovation Solution
Organizing component carriers into CSI reporting groups, where individual reports are combined into single reports transmitted over uplink control or data channels, with prioritization schemes based on reporting type and serving cell indices to resolve collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of component carriers is increased to enhance carrier aggregation capacity, then spectrum resource utilization is improved, but report collision frequency increases and communication link reliability deteriorates
Solution Approach 1:
The patent divides component carriers into multiple CSI reporting groups, where each group contains a subset of component carriers. This segmentation allows CSI reports from different groups to be transmitted at different times or on different resources, reducing collision frequency while maintaining the ability to utilize multiple component carriers for enhanced spectrum efficiency.
2Measurement precision
If individual CSI reports are transmitted for each component carrier to maintain reporting precision, then measurement precision is improved, but report collision frequency increases and system complexity worsens
Solution Approach 1:
The patent combines multiple CSI reports from component carriers within the same reporting group into a single aggregated report. This merging approach maintains comprehensive channel state information while reducing the total number of separate transmissions, thereby lowering collision probability and simplifying the reporting system architecture.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods, systems, and devices are described for wireless communication in a system that supports enhanced carrier aggregation (eCA). An eCA configuration with a large number of component carriers (CCs) may include CCs grouped into channel state information (CSI) reporting groups. Channel state reports for the CCs in each group may be reported together. In some cases, individual CC reports may be multiplexed into a single report, and in other cases a single channel state report may contain information related to each CC in the group. The combined reports may be transmitted over an uplink control channel or an uplink data channel, or both. Collisions between reports may be resolved based on the reporting type of the groups or the serving cell indices of the CCs in the group.