CSI-RS Resource Configuration for Discontiguous RB Sets
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Solution Overview
Problem
The existing CSI-RS resource scheme is not applicable in subband non-overlapping full duplex (SBFD) scenarios, leading to inefficiencies and increased hardware complexity and signaling overheads in wireless communication systems.
Innovation Solution
A unified design scheme for CSI-RS resources is introduced, allowing for CSI-RS resources to span across discontiguous RB sets, enabling flexible configuration and reducing hardware complexity and signaling overheads while maintaining compatibility with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing CSI-RS resource scheme is used, then compatibility with existing systems is maintained, but it is not applicable in SBFD scenarios and leads to increased hardware complexity and signaling overheads
Solution Approach 1:
The frequency-domain resource is segmented into multiple RB sets that can be independently configured. The CSI-RS resource can span across multiple discontiguous RB sets, allowing flexible adaptation to SBFD scenarios while maintaining compatibility with existing contiguous RB configurations through proper segmentation of the frequency resources
Solution Approach 2:
The unified design scheme for CSI-RS resources provides multi-functionality by supporting both contiguous and discontiguous RB set configurations within a single resource definition. This universal approach enables the same CSI-RS resource mechanism to work in both SBFD and non-SBFD scenarios, eliminating the need for separate hardware complexes for different configuration types
2Adaptability or versatility
If the existing CSI-RS resource scheme is used, then system compatibility is maintained, but signaling overheads are increased
Solution Approach 1:
Multiple configuration options (contiguous and discontiguous RB sets) are merged into a single unified CSI-RS resource definition. The resource configuration combines frequency-domain resource indication with RB set mapping information, allowing both configuration types to be signaled through a unified mechanism that reduces overall signaling overhead compared to separate configuration schemes
Solution Approach 2:
The patent introduces a new dimension of configuration by mapping RB sets to frequency resources in a hierarchical manner. Instead of configuring each RB individually or using separate contiguous/discontiguous configurations, the system uses RB set indexing and frequency occupation patterns to efficiently represent both contiguous and discontiguous configurations with reduced signaling bits
3Productivity
If CSI-RS resources span across discontiguous RB sets, then flexibility and transmission efficiency are improved, but measurement complexity may increase
Solution Approach 1:
The measurement process is segmented by RB sets, where each RB set can be measured independently. The UE performs channel measurement and interference measurement on each RB set separately, then combines the results to obtain the overall CSI. This segmentation approach maintains measurement simplicity while enabling discontiguous frequency resource utilization for improved transmission efficiency in SBFD scenarios
Data Source
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AI summary
Disclosed in the present invention are a method and device for wireless communication. The method comprises: receiving a first message, wherein the first message is used for indicating a first CSI-RS resource set, and the first CSI-RS resource set comprises a first CSI-RS resource. A frequency-domain resource through which the first CSI-RS resource passes comprises at least two RB sets, and any two of the at least two RB sets are discontinuous in a frequency domain. The present application can improve the configuration flexibility while maintaining good compatibility with existing systems.