Wireless Communication Apparatus VRB to PRB Interleaved Mapping Alignment
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately implementing VRB-to-PRB mapping, particularly with interleaved mapping, where alignment issues between resource block bundles and precoding resource groups lead to inaccurate channel estimation and suboptimal data transmission performance.
Innovation Solution
The proposed solution involves determining the quantity of virtual resource blocks in an initial resource block bundle based on the resource block start index and size of a bandwidth part, and using modified interleaving techniques to align boundaries between resource block bundles and precoding resource groups, ensuring accurate mapping and improved data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If interleaved mapping is used for VRB-to-PRB mapping, then resource allocation flexibility is improved, but alignment accuracy between resource block bundles and precoding resource groups deteriorates
Solution Approach 1:
The patent segments the resource block mapping process into distinct stages: VRB indexing, interleaving operation, and PRB mapping. By introducing a separate indexing stage before interleaving, the system can independently control the segmentation of virtual resource blocks into bundles, ensuring proper alignment with precoding resource groups while maintaining interleaved mapping flexibility for resource allocation.
Solution Approach 2:
The patent introduces VRB indexing as an intermediary step between resource allocation and physical resource block mapping. This intermediary mechanism (the indexing process) enables the system to prepare virtual resource block indices in a controlled manner before applying interleaving, thereby mediating between the flexibility requirement of interleaved mapping and the alignment requirement with precoding resource groups.
2Reliability
If interleaving is performed for VRB-to-PRB mapping, then resource distribution uniformity is improved, but channel estimation accuracy deteriorates due to misalignment
Solution Approach 1:
The patent performs preliminary VRB indexing before interleaving to ensure that virtual resource blocks are properly organized and aligned with precoding resource groups in advance. This preliminary action (indexing) prepares the data structure so that subsequent interleaving operations maintain both uniform resource distribution and proper alignment for accurate channel estimation.
Solution Approach 2:
The patent changes the indexing parameters of virtual resource blocks to ensure alignment with precoding resource group boundaries. By adjusting how VRBs are indexed and grouped (changing the indexing parameters), the system achieves both uniform resource distribution through interleaving and proper alignment for channel estimation, resolving the contradiction between these two requirements.
Data Source
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AI summary
A wireless communication apparatus and a wireless communication method are provided. The wireless communication apparatus includes: a processing unit, configured to determine indexes of virtual resource blocks in a plurality of resource block bundles based on a resource block start index of a bandwidth part and a size of a resource block bundle; and a mapping unit, configured to perform interleaved mapping to the plurality of resource block bundles, to determine indexes of physical resource blocks corresponding to the indexes of the virtual resource blocks, where the plurality of resource block bundles include an initial resource block bundle for the interleaved mapping, and a quantity of virtual resource blocks in the initial resource block bundle is less than the size of the resource block bundle. In embodiments of this application, because the quantity of virtual resource blocks in the initial resource block bundle may be less than the size of the resource block bundle, and the quantity of virtual resource blocks in the initial resource block bundle may be flexibly set as required, so that the initial resource block bundle is aligned with an initial precoding resource block group in the bandwidth part, thereby effectively improving data transmission performance.