Subband CSI Reporting Using Reference-Based Differential Values
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Solution Overview
Problem
In wireless communication, there is no difference in reporting manners between subbands, leading to excessive redundant information, which occupies reporting resources, increases energy consumption, and reduces the accuracy and utilization rate of channel state reporting.
Innovation Solution
Divide subbands into two sets, reporting the channel state information of one set and the relative values of the other set, allowing the receiving side to determine the full CSI based on the reference subbands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the same reporting manner is used for all subbands, then the implementation is simple and uniform, but redundant information increases and resource utilization decreases
Solution Approach 1:
The patent divides subbands into a first set and a second set, applying different reporting manners to each set. For the first set, full channel state information is reported, while for the second set, only differential information relative to reference subbands is reported. This segmentation resolves the contradiction by maintaining simplicity for the first set while reducing redundancy for the second set.
Solution Approach 2:
The patent applies different reporting strategies to different subband sets based on their local characteristics. The first set uses comprehensive reporting to ensure accuracy, while the second set uses differential reporting to reduce redundancy. This local differentiation resolves the contradiction between uniform simplicity and redundancy reduction.
2Measurement precision
If full channel state information is reported for all subbands, then the accuracy of channel state reporting is improved, but reporting resources are occupied and utilization rate decreases
Solution Approach 1:
The patent segments subbands into two sets and applies different reporting granularities. The first set reports full channel state information to maintain accuracy, while the second set reports only differential information to improve resource utilization. This segmentation resolves the contradiction between accuracy and resource efficiency.
Solution Approach 2:
The patent changes the reporting parameter granularity based on subband set. For the first set, complete CSI parameters are reported, while for the second set, only differential parameters relative to reference subbands are reported. This parameter differentiation maintains necessary accuracy while improving overall resource utilization.
3Productivity
If differential reporting is used for all subbands, then resource overhead is reduced, but the accuracy of channel state reporting decreases
Solution Approach 1:
The patent segments subbands into two sets, applying full reporting to the first set to maintain accuracy and differential reporting to the second set to reduce overhead. This segmentation resolves the contradiction between resource efficiency and reporting accuracy.
Solution Approach 2:
The patent applies different reporting qualities to different subband sets. The first set receives comprehensive reporting to ensure high accuracy, while the second set uses differential reporting for improved resource efficiency. This local quality differentiation resolves the contradiction between overhead reduction and accuracy maintenance.
4Loss of information
If redundant information is reported on subbands, then complete channel state information is provided, but energy consumption of reporting terminals increases
Solution Approach 1:
The patent segments subbands into two sets, reporting full information for the first set and differential information for the second set. This segmentation reduces the total amount of information that needs to be processed and transmitted, thereby reducing energy consumption while maintaining necessary information completeness.
Solution Approach 2:
The patent changes the information reporting parameter from complete CSI to differential CSI for the second subband set. This parameter change reduces the data volume that terminals need to process and transmit, thereby reducing energy consumption while maintaining adequate channel state information through the differential approach.
Data Source
Figure 1~3
AI summary
Provided are a method and device for reporting channel state information (CSI), a method and device for processing channel state information, and a storage medium. The method for reporting channel state information includes: dividing M subbands to be reported into two sets; determining a relative value between CSI of each subband in a second set and CSI of a reference subband corresponding to the each subband in the second set; and reporting CSI of each subband in a first set and the relative value of the each subband in the second set to a base station.