CSI-RS Detection via SSB Candidate Binding in NR-U
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Solution Overview
Problem
In communication systems, particularly in NR-U systems, there is no definite solution for terminal devices to accurately detect CSI-RS resources due to uncertain channel availability and the need to ensure synchronization signal transmission, leading to unnecessary detection and resource overhead.
Innovation Solution
The method involves detecting first SSB information that includes an SSB candidate index associated with a CSI-RS, and determining its validity to accurately detect the CSI-RS, reducing unnecessary detection and resource overhead by binding SSB and CSI-RS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device detects CSI-RS resources without definite solution due to uncertain channel availability, then the synchronization signal transmission can be ensured, but unnecessary detection and resource overhead increase
Solution Approach 1:
The patent applies preliminary action by binding CSI-RS resources to SSB candidates in advance through configuration information. The terminal device receives pre-configured associations between SSB candidate indexes and CSI-RS resources, allowing it to determine detectable CSI-RS resources based on detected SSB candidates, thereby avoiding unnecessary detection of unavailable resources
Solution Approach 2:
The patent changes the parameter of resource association by introducing configuration information that explicitly links SSB candidate indexes to CSI-RS resource indicators. This parameter change enables the terminal device to dynamically determine which CSI-RS resources are detectable based on actual SSB detection results, reducing wasted detection efforts
2Measurement precision
If the terminal device performs comprehensive CSI-RS detection to ensure accurate resource detection, then detection accuracy improves, but detection complexity and time increase
Solution Approach 1:
The patent extracts only the necessary CSI-RS detection tasks by removing the need to detect all possible CSI-RS resources. Through configuration information containing SSB candidate indexes and their associated CSI-RS resources, the terminal device extracts and detects only those CSI-RS resources corresponding to actually detected SSB candidates, reducing detection complexity while maintaining accuracy
Solution Approach 2:
The patent uses preliminary configuration of SSB-CSI-RS associations to guide the detection process. The terminal device receives pre-configured mapping relationships between SSB candidates and CSI-RS resources, enabling it to focus detection efforts only on relevant resources, thereby simplifying the detection process while ensuring accurate resource identification
3Productivity
If the base station transmits CSI-RS resources corresponding to SSB to meet channel occupancy requirements, then channel occupancy rate improves, but system resource burden increases due to unnecessary transmission
Solution Approach 1:
The base station performs preliminary action by pre-configuring and transmitting only the CSI-RS resources that are actually needed, based on the SSB candidates that will be transmitted. The configuration information explicitly associates SSB candidate indexes with CSI-RS resources, enabling the base station to avoid transmitting unnecessary CSI-RS resources and reducing system resource overhead
Solution Approach 2:
The patent changes the transmission parameter by making CSI-RS resource transmission conditional and selective rather than comprehensive. Through configuration information that links SSB candidates to specific CSI-RS resources, the base station transmits only the necessary CSI-RS resources, optimizing resource usage while maintaining channel occupancy requirements
Data Source
AI summary
Embodiments of the present disclosure provide a signal detection method, a signal transmission method, a terminal device, and a network device, capable of accurately detecting a Channel State Information-Reference Signal (CSI-RS) resource, avoiding unnecessary detection, and reducing detection overhead of the terminal device. The method includes: detecting, by a terminal device, first Synchronization Signal/Physical Broadcast Channel Block (SSB) information, wherein the first SSB information includes an SSB candidate index associated with a CSI-RS; and detecting, by the terminal device, the CSI-RS associated with the SSB candidate index.