Wireless Node Precoding Across Discontinuous RB Groups
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Solution Overview
Problem
In wireless communication systems, particularly in NR systems with TDD and FDD spectra, the half-duplex mode leads to reduced resource utilization and increased latency, while flexible duplex modes like SBFD improve resource utilization but pose challenges in designing precoding for discontinuous frequency domain resources.
Innovation Solution
A method for determining precoding in discontinuous frequency domain resources by using conditions related to both RB groups, ensuring same precoding is applied when specific criteria are met, enhancing transmission performance and reducing hardware complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference is avoided and cross link interference is alleviated, but resource utilization rate decreases and latency increases
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands, allowing different subbands to operate in different duplex modes simultaneously. This enables partial full-duplex operation in some subbands while maintaining half-duplex in others, thereby improving overall resource utilization while controlling interference through selective subband management.
Solution Approach 2:
The patent applies different duplex mode characteristics to different frequency subbands based on local channel conditions and interference requirements. Each subband can be independently configured with appropriate duplex mode, enabling optimized resource utilization in favorable subbands while maintaining interference avoidance in sensitive subbands.
2Productivity
If full-duplex mode or flexible duplex mode is used in TDD spectrum, then resource utilization is improved and latency is reduced, but interference management becomes more challenging
Solution Approach 1:
The patent divides the frequency spectrum into multiple subbands and applies precoding independently to each subband. This segmentation approach simplifies interference management by localizing interference effects to specific subbands, allowing targeted precoding solutions without requiring complex system-wide interference coordination.
Solution Approach 2:
The patent performs precoding operations in advance before signal transmission, pre-compensating for expected interference effects. By calculating and applying precoding weights beforehand based on channel state information, the system proactively mitigates interference rather than reacting to it, reducing real-time management complexity.
3Adaptability or versatility
If PDSCH is assigned resources in two discontinuous frequency domain resources, then flexible duplex mode operation is enabled, but precoding design becomes more complex
Solution Approach 1:
The patent treats discontinuous frequency domain resources as separate subbands and applies independent precoding to each segment. This segmentation approach simplifies precoding design by handling each continuous frequency segment separately rather than attempting to design a single precoder for the entire discontinuous allocation, reducing computational complexity while maintaining flexibility.
Solution Approach 2:
The patent applies different precoding parameters to different discontinuous frequency segments based on their specific channel characteristics and duplex mode requirements. Each frequency segment receives locally optimized precoding tailored to its specific conditions, enabling effective transmission over discontinuous resources without requiring a overly complex unified precoding design.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus for a node used for wireless communication. A first node receives a first information block, receives first signaling, and receives a first signal. The first information block is used for determining a first frequency domain resource and a second frequency domain resource, the first frequency domain resource is orthogonal to the second frequency domain resource, and the first frequency domain resource and the second frequency domain resource are discontinuous. The first signaling indicates scheduling information of the first signal. The first signal occupies a first RB group and a second RB group, the first RB group belongs to the first frequency domain resource, and the second RB group belongs to the second frequency domain resource. Whether same precoding is applied to the first RB group and the second RB group depends on whether a first condition is satisfied. The first condition is related to both the first RB group and the second RB group. The method realizes a more flexible precoding scheme, and improves the transmission performance and the system performance.