Flexible Slot Frame Structures for Cross-Link Interference Mitigation
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges with cross-link interference due to asynchronous and semi-synchronous operations in TDD networks, leading to increased interference between uplink and downlink transmissions.
Innovation Solution
Configuring frame structures with flexible slots that include multiple subband resources, allowing for dynamic adjustment of transmission directions and interference management through beamforming and signal cancellation based on interference levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible slots with multiple subband resources are configured, then adaptability to different transmission directions is improved, but device complexity increases
Solution Approach 1:
The flexible slots are divided into multiple subband resources, allowing independent configuration and utilization of different frequency bands for different transmission directions. This segmentation enables the system to allocate specific subbands for downlink or uplink transmissions, improving adaptability while managing complexity through structured organization.
Solution Approach 2:
The frame structure incorporates dynamic configuration capabilities where the utilization of flexible slots can be adjusted based on interference conditions and transmission requirements. The system can dynamically switch between different transmission directions and allocate subband resources accordingly, enhancing versatility through dynamic adaptation.
2Object-affected harmful factors
If beamforming and signal cancellation are applied, then cross-link interference is reduced, but processing requirements and device complexity increase
Solution Approach 1:
The patent applies signal cancellation techniques that convert harmful cross-link interference into manageable signals. By detecting and characterizing the interference, the system can generate cancellation signals that subtract the interference from the received signal, effectively converting the harmful interference into a controlled processing step that improves signal quality.
Solution Approach 2:
Beamforming acts as an intermediary mechanism that directs signals along specific paths while suppressing others. The beamforming process creates a controlled electromagnetic field distribution that separates desired signals from interfering signals, providing a physical-layer mediation that reduces cross-link interference before it reaches the receiver.
3Productivity
If frame structure optimization is implemented, then communication efficiency is enhanced, but system configuration complexity increases
Solution Approach 1:
The patent optimizes communication efficiency by dynamically changing frame structure parameters such as slot configurations, subband allocations, and transmission directions based on channel conditions and interference levels. The system adjusts these parameters to maximize spectral efficiency and minimize interference, achieving improved productivity through parameter adaptation.
Data Source
AI summary
The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a user equipment (UE) and/or base station. In one aspect, the apparatus may configure a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources. The apparatus may also signal configuration information of the frame structure including the plurality of slots. Additionally, the apparatus may communicate data via the frame structure including the plurality of slots.