5G Interference Coordination via Angle Restriction Feedback
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Solution Overview
Problem
Existing interference coordination methods in 5G systems face excessive signaling overheads and limited application scenarios due to the inefficiencies in feedback mechanisms, particularly with the codebook subset restriction method, which causes information redundancy and cannot be effectively used.
Innovation Solution
The method involves a terminal receiving direction restriction information, including angle restriction information, to determine a signal preprocessing manner that avoids restricted transmission directions, thereby reducing inter-cell interference and expanding the interference coordination application scenario without information redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the codebook subset restriction method is used for interference coordination, then the transmission direction can be restricted to avoid interference, but the signaling overhead increases due to information redundancy in feedback
Solution Approach 1:
The patent extracts only the necessary angle restriction information from the complete codebook feedback, separating the essential directional constraints from redundant codeword-level details. This allows the system to achieve interference coordination by transmitting only the minimal required angle parameters rather than complete codebook subset restrictions.
Solution Approach 2:
Instead of restricting specific codewords to avoid interference (traditional approach), the patent inverts the approach by directly specifying allowed angle ranges for transmission. This reversal simplifies the feedback mechanism by focusing on angular constraints rather than codeword exclusions, reducing signaling overhead while maintaining interference coordination effectiveness.
2Object-affected harmful factors
If the codebook subset restriction method is applied, then interference coordination can be achieved, but the method cannot be effectively used in 5G systems due to fundamental differences in feedback principles
Solution Approach 1:
The patent creates a universal angle restriction mechanism that can be applied across different feedback types (quantized channel information, covariance matrix, codebook feedback). By formulating the interference coordination approach in terms of general angular constraints rather than codebook-specific restrictions, the method becomes adaptable to various 5G feedback scenarios and channel representation formats.
Solution Approach 2:
The patent changes the parameter space from codebook indices and codeword selections to continuous or quantized angle parameters. This parameter transformation allows the interference coordination method to work with different channel feedback representations in 5G, making the approach versatile across various application scenarios including massive MIMO and different codebook structures.
Data Source
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AI summary
Embodiments of the present invention disclose an interference coordination method and apparatus. The method includes: receiving direction restriction information, where the direction restriction information includes angle restriction information, and the angle restriction information is used to indicate a restricted transmission direction; determining a signal preprocessing manner, where a transmission direction formed based on the signal preprocessing manner does not include the restricted transmission direction; and feeding back the signal preprocessing manner. According to the embodiments of the present invention, signaling overheads can be reduced, and an interference coordination application scenario can be expanded.