Channel Quality Reporting via Edge Subband Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current channel quality reporting methods in wireless communications networks are inadequate in accurately and efficiently reporting interference from other user equipment, as they either fail to reflect actual channel states or require excessive resources.
Innovation Solution
The proposed solution involves user equipment performing channel state measurements on non-overlapping frequency resources of a carrier, including edge resource blocks, and reporting this information to a network device, allowing for independent and accurate interference detection and reporting with reduced resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wideband CSI solution is used to report average channel state of entire frequency band, then reporting is simple and resources are saved, but accuracy of channel state reflection deteriorates when interference occurs on specific frequency bands
Solution Approach 1:
The frequency band is segmented into multiple subbands, and the UE reports CSI for specific subbands (including edge subbands) rather than the entire band. This segmentation allows targeted reporting of interference-affected regions while maintaining overall simplicity, resolving the contradiction between reporting simplicity and accuracy.
2Quantity of substance
If optimal M-subband CSI solution is used to report channel states of M subbands with optional channel conditions, then reporting resources are reduced, but accuracy deteriorates because subbands with poor channel quality (interference-affected) are excluded
Solution Approach 1:
The solution applies local quality by specifically measuring and reporting edge subbands that are more susceptible to interference, rather than uniformly selecting subbands based on channel quality. This targeted approach ensures that interference-affected regions are captured while maintaining efficient resource usage.
Solution Approach 2:
The UE performs preliminary measurement on edge subbands and includes them in the CSI report before network scheduling decisions are made. This preliminary identification of interference-affected subbands allows the network to proactively adjust scheduling, preventing resource allocation to interference-prone subbands.
3Measurement precision
If subband CSI solution is used to report channel state of each subband, then accuracy of channel state reflection is improved, but resource consumption and base station signaling overhead increase significantly
Solution Approach 1:
The solution extracts only the essential information needed for interference detection by reporting CSI for specific subbands (particularly edge subbands) rather than all subbands. This extraction maintains sufficient accuracy for interference identification while significantly reducing reporting overhead compared to full subband reporting.
Data Source
AI summary
A channel quality reporting apparatus includes: a processing module and a sending module. The processing module performs channel state measurement on a first frequency resource of a first carrier to obtain first CSI, and performs channel state measurement on a second frequency resource of the first carrier to obtain second CSI, where the first frequency resource and the second frequency resource do not overlap, resource blocks in the first frequency resource are consecutive, resource blocks in the second frequency resource are consecutive, and the second frequency resource includes an edge resource block of the first carrier. The sending module reports the first CSI to a second communications device, and report the second CSI to the second communications device.