Interference Cancellation Feedback for Wireless Scheduling Efficiency
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in scheduling user equipment due to fluctuations in channel quality indicators (CQI) caused by incorrect interference cell code block decoding, leading to suboptimal interference cancellation gains.
Innovation Solution
A method for generating and feeding back channel quality indicators and interference cancellation indication information from user equipment to the network side, allowing the network to accurately assess and schedule interference cancellation operations, thereby improving scheduling efficiency and utilizing interference cancellation gains effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference cell code block decoding is performed on UE side, then interference cancellation gain can be achieved, but CQI fluctuation occurs when decoding is incorrect, reducing scheduling efficiency
Solution Approach 1:
The patent introduces feedback mechanisms where UE feeds back interference cancellation status information and CQI to the network side. The network side uses this feedback to adjust scheduling decisions, creating a closed-loop system that adapts to interference cancellation performance and maintains scheduling efficiency despite CQI fluctuations.
Solution Approach 2:
The patent introduces an intermediary information layer (interference cancellation status indication) that mediates between the interference cancellation process and scheduling decisions. This intermediary provides the network side with explicit knowledge of interference cancellation status, enabling informed scheduling without directly causing CQI fluctuation.
2Device complexity
If CQI is fed back without interference cancellation status information, then feedback overhead is reduced, but network side cannot distinguish between channel quality changes and decoding results, reducing scheduling accuracy
Solution Approach 1:
The patent segments the feedback information into distinct components: CQI for channel quality and interference cancellation status indication for decoding status. This segmentation allows the network side to process each type of information separately, maintaining scheduling accuracy while managing feedback overhead through efficient encoding and transmission of segmented feedback elements.
Data Source
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AI summary
An embodiment of the present invention discloses an interference cancelation feedback method. A channel quality indicator CQI of a serving cell is generated according to a received signal, where the received signal includes a serving cell signal and an interference cell signal, where an interference cell interferes with the serving cell of user equipment; interference cancelation indication information is generated, where the interference cancelation indication information is used to indicate a situation of interference cancelation performed on the received signal by the user equipment; the channel quality indicator CQI of the serving cell is fed back to a network side; and the interference cancelation indication information is fed back to the network side, where the interference cancelation indication information and the channel quality indicator CQI of the serving cell are used by the network side to schedule the user equipment. Correspondingly, the present invention further discloses a related apparatus and a system. By means of the present invention, interference cancelation indication information is fed back to a network side, which resolves a problem of low efficiency of a scheduler on the network side because of CQI fluctuation in NAIC in the prior art, implements more efficient scheduling on UE by the network side, and makes full use of an interference cancelation gain.