Interference Alignment in Multi-Antenna Communication Systems
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Solution Overview
Problem
Current interference control schemes in 5G communication systems are inefficient in managing interference between base stations and user terminals, particularly in environments with diverse structural and hierarchical architectures, leading to suboptimal use of time/frequency resources and difficulty in signal reconstruction.
Innovation Solution
A method and apparatus that utilize multiple antennas to generate and transmit preference information for beam configuration and power control, aligning interference signals in specific areas, allowing for more accurate signal reconstruction and flexible operation by dividing reception areas and applying different reconstruction schemes based on interference sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint-decoding reconstruction scheme is used, then signal reconstruction accuracy is improved, but implementation complexity increases
Solution Approach 1:
The reception area is divided into multiple partial areas based on interference signal characteristics. Each partial area is processed using appropriate reconstruction schemes, allowing complex joint-decoding to be applied only where necessary while simpler schemes are used elsewhere, thus reducing overall implementation complexity while maintaining accuracy where needed
Solution Approach 2:
Different reconstruction schemes are applied to different partial areas according to their specific interference characteristics. This localized approach ensures high reconstruction accuracy in areas with strong interference while using simpler methods in areas with weak interference, optimizing the balance between accuracy and complexity
2Device complexity
If interference alignment technology is used, then implementation complexity is reduced, but interference dimension utilization is insufficient
Solution Approach 1:
The patent extends interference alignment from traditional single-dimension approaches to multi-dimensional space by utilizing both spatial dimensions (multiple antennas) and signal space dimensions. This allows for more comprehensive interference management that fully exploits available degrees of freedom, improving transmission efficiency while maintaining manageable complexity
Solution Approach 2:
The system dynamically adjusts beamforming parameters and reconstruction scheme selection based on channel conditions and interference characteristics. By changing parameters adaptively, the system achieves better interference alignment performance and utilizes available dimensions more effectively, improving overall transmission efficiency
3Device complexity
If conventional interference control schemes are used, then interference management is simplified, but time/frequency resource utilization is inefficient
Solution Approach 1:
The patent employs dynamic beamforming and adaptive reconstruction scheme selection that responds to changing channel and interference conditions. This dynamic approach allows the system to efficiently allocate time and frequency resources by adjusting beam directions and reconstruction methods in real-time, significantly improving resource utilization compared to static conventional schemes
Solution Approach 2:
The system performs preliminary channel estimation and interference characterization before data transmission. Based on this advance information, beamforming parameters and reconstruction schemes are pre-configured to optimize resource utilization, allowing the system to proactively manage interference and resources rather than reacting to conditions after they occur
Data Source
AI summary
A method includes generating preference information according to each of a plurality of base stations including at least one adjacent base station and transmitting the generated preference information to a serving base station, receiving, from the serving base station, information related to beams of the serving base station and the at least one adjacent base station determined based on the preference information, and receiving a signal by using the information related to the beams, wherein the information related to the beams includes beam information on a partial area in which interference signals transmitted by the at least one adjacent base station are aligned among a whole reception area of the terminal. A serving base station includes a controller configured to configure beams for a partial area in which interference signals transmitted by the at least one adjacent base station are aligned among a whole reception area of the terminal.