Unlicensed Carrier BWP Subband CSI-RS Configuration
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Solution Overview
Problem
Current wireless communication systems lack a reference solution for obtaining resources to transmit Channel State Information Reference Signal (CSI-RS) and Channel State Information Interference Measurement (CSI-IM) on Bandwidth Parts (BWP) of unlicensed carriers, which hinders communication performance improvement.
Innovation Solution
A method where a terminal device receives configuration information from a network device to determine CSI-RS and/or CSI-IM resources on a BWP with at least two subbands in the frequency domain, allowing valid channel measurements on unlicensed carriers, thereby enhancing communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSI-RS and CSI-IM measurements are performed on unlicensed carriers without a reference solution, then communication performance improvement is hindered, but implementing a reference solution requires additional configuration complexity
Solution Approach 1:
The BWP is divided into multiple subbands in the frequency domain, with each subband independently configured for CSI-RS and/or CSI-IM resources. This segmentation allows the terminal to perform measurements on specific subbands within the BWP, enabling flexible resource allocation and improving communication performance on unlicensed carriers without requiring complex system-wide reconfiguration.
Solution Approach 2:
The patent implements dynamic BWP configuration where the network can activate different BWPs and adjust subband allocations adaptively. The terminal receives configuration information that dynamically specifies which subbands contain CSI-RS and/or CSI-IM resources, allowing the system to optimize resource usage based on current channel conditions and interference levels, thereby improving productivity without permanent complexity increase.
2Adaptability or versatility
If configuration information for CSI-RS and CSI-IM resources is provided at the BWP level, then measurement flexibility is reduced, but providing subband-level configuration increases signaling overhead
Solution Approach 1:
The configuration information is segmented to operate at the subband level rather than the entire BWP level. Each subband within the BWP can be independently configured with CSI-RS and/or CSI-IM resources, providing fine-grained measurement flexibility. The terminal receives configuration that specifies resource locations within individual subbands, enabling adaptive measurements without requiring exhaustive signaling for the entire BWP.
Solution Approach 2:
Different quality characteristics are applied to different subbands within the BWP. The network can configure specific subbands to have CSI-RS resources for channel quality measurement, other subbands to have CSI-IM resources for interference measurement, and yet other subbands may not require measurement resources. This local differentiation optimizes measurement flexibility while minimizing signaling overhead by only configuring resources where needed.
Data Source
AI summary
Disclosed in embodiments of the present disclosure are a wireless communication method, a terminal device and a network device. The method includes that the terminal device receives configuration information of a first resource from the network device and the terminal device determines the first resource on a first bandwidth part (BWP) according to the configuration information. The first resource includes a channel state information reference signal CSI-RS resource and/or a channel state information interference measurement CSI-IM resource. The first BWP is a BWP on an unlicensed carrier, and the first BWP includes at least two subbands in a frequency domain.