CSI-RS Configuration for Subband Full-Duplex Interference
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing channel state information reference signals (CSI-RS) for subband full-duplex (SBFD) operations, particularly in allocating resources effectively across multiple downlink subbands to mitigate interference and enhance communication performance.
Innovation Solution
The proposed solution involves receiving and transmitting CSI-RS transmissions in a SBFD slot, with resource configurations determined by CSI-RS sequence and frequency information, allowing CSI-RS resources to occupy two or more downlink subbands, thereby enhancing resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSI-RS resources are allocated in traditional single-subband manner, then resource allocation is simple, but communication performance and throughput are limited
Solution Approach 1:
The patent divides the frequency spectrum into multiple downlink subbands within an SBFD slot and allocates CSI-RS resources across these segmented subbands. This segmentation enables parallel CSI measurements on different frequency segments, increasing overall throughput while maintaining manageable allocation complexity through structured resource configuration
Solution Approach 2:
The patent transitions from traditional single-subband CSI-RS allocation to multi-subband allocation by adding the subband dimension to the resource allocation framework. This dimensional expansion allows simultaneous CSI measurements across multiple frequency subbands, significantly improving productivity without overwhelming complexity through standardized configuration parameters
2Measurement precision
If multiple CSI-RS transmissions are performed across multiple downlink subbands, then channel state information accuracy improves, but interference management becomes more challenging
Solution Approach 1:
The patent applies local quality by configuring CSI-RS resources with specific frequency domain allocations that target particular downlink subbands. Each CSI-RS transmission is locally optimized for its designated subband, improving measurement precision for that specific frequency region while the network coordinates to manage interference across different local regions
Solution Approach 2:
The patent introduces intermediary mechanisms through detailed resource configuration parameters (frequency domain allocation, resource mapping, sequence initialization) that mediate between multi-subband CSI-RS transmissions and interference management. These configuration parameters act as intermediaries to coordinate resource usage and mitigate interference while maintaining measurement accuracy
3Productivity
If CSI-RS resources occupy two or more downlink subbands, then resource utilization efficiency increases, but configuration and management complexity increases
Solution Approach 1:
The patent creates a universal resource allocation framework where a single CSI-RS resource configuration can span multiple downlink subbands. This multi-functional configuration approach improves resource utilization efficiency by allowing flexible allocation across subbands while maintaining standardized configuration parameters that prevent excessive complexity
Solution Approach 2:
The patent manages configuration complexity through parameterization, where key resource allocation characteristics (frequency domain allocation, resource mapping, sequence initialization) are controlled by configurable parameters. By changing these parameters, the system can adapt CSI-RS resource allocation across different numbers and configurations of downlink subbands, improving productivity without proportionally increasing management complexity
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support (CSI-RS) configuration enhancements for subband full-duplex (SBFD) operations. In a first aspect, a device for wireless communication includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to receive a control channel transmission including CSI-RS resource configuration information from a second network node. The at least one processor is further configured to receive, in a SBFD slot, a CSI-RS transmission from the second network node based on CSI-RS sequence information, CSI-RS frequency resource information, or both, wherein the CSI-RS sequence information, the CSI-RS frequency resource information, or both, are determined based on the CSI-RS resource configuration information, and wherein CSI-RS resources of the CSI-RS transmission occupy two or more downlink subbands of the SBFD slot. Other aspects and features are also claimed and described.