5G NR Subband CSI Reporting for Full Duplex Interference Control
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing subband reporting for full duplex operations, particularly in unlicensed and licensed spectrum scenarios, which affect network performance and resource allocation.
Innovation Solution
Implementing subband reporting techniques for full duplex operation, including CSI reporting subbands and L3 cross-link interference reporting, to optimize resource allocation and mitigate interference in both licensed and unlicensed spectrum environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operation is implemented in unlicensed and licensed spectrum, then network throughput and resource utilization are improved, but interference management and subband reporting complexity increase
Solution Approach 1:
The patent divides the frequency spectrum into multiple subbands for independent reporting and interference management. Each subband can be separately configured and reported, allowing the system to handle full duplex operations in specific subbands without affecting others, thereby managing complexity through segmentation of the reporting process.
Solution Approach 2:
The patent introduces a new dimension of subband-specific reporting mechanisms to manage full duplex interference. By adding frequency-domain granularity to reporting, the system can identify and mitigate interference in specific subbands while maintaining efficient communication in others, resolving the contradiction between throughput improvement and complexity increase.
2Object-affected harmful factors
If subband reporting is implemented for full duplex operation, then interference mitigation is improved, but signaling overhead and processing requirements increase
Solution Approach 1:
The patent creates universal subband reporting mechanisms that serve multiple functions: interference identification, resource allocation optimization, and channel quality assessment. This multi-functionality reduces the need for separate signaling for each purpose, thereby mitigating interference while minimizing signaling overhead.
Solution Approach 2:
The patent dynamically adjusts reporting parameters such as subband size, reporting frequency, and granularity based on channel conditions and interference levels. When interference is high, more detailed subband reporting is activated; when conditions are good, reporting is reduced, thereby effectively managing interference while adapting signaling overhead to actual network needs.
3Manufacturing precision
If CSI reporting subbands are configured for full duplex, then resource allocation precision is improved, but measurement and reporting latency increase
Solution Approach 1:
The patent implements dynamic subband configuration where CSI reporting subbands are adaptively adjusted based on traffic patterns, channel conditions, and interference levels. The system can switch between wideband and subband reporting modes, and dynamically select which subbands require detailed CSI reporting, thereby achieving precise resource allocation when needed while reducing latency during normal conditions.
Data Source
AI summary
A computer-readable storage medium stores instructions for execution by one or more processors of a UE to configure the UE for SBFD operation in a 5G NR network, and to cause the UE to decode RRC signaling received from a base station and including at least one CSI-RS resource set with time-frequency resource allocation associated with a CSI-RS transmission. A CSI reporting band is determined with a plurality of PRBs based on the RRC signaling. The CSI reporting band including a subset of the plurality of PRBs associated with one or more DL subband(s) in symbols or slots identified via higher layer signaling or a combination of higher layer and Layer 1 signaling for SBFD operation. Channel measurements are performed based on CSI-RSs transmitted during the CSI-RS transmission. The measurements are associated with the subset of the plurality of PRBs in the CSI reporting band.