NR-U Reference Signal Indication via SSB Index Redefinition
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Solution Overview
Problem
In New Radio Unlicensed (NR-U) systems, the change in meaning of the SSB index for indicating reference signals complicates the indication of beam information for link monitoring and measurement, as the quasi-co-located (QCL) relationship is not directly carried in the SSB, requiring redefinition of the SSB index to correctly indicate beam information.
Innovation Solution
A method and device for indicating a reference signal, where a terminal receives or a network device sends configuration information including first indication information, which can be either first index information representing the sending position of the reference signal or second index information representing the QCL relationship of the reference signal, allowing for accurate link quality measurement and beam information determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SSB index is redefined to indicate reference signal for link monitoring and measurement in NR-U, then the beam information indication accuracy is improved, but the system complexity increases due to the change in identifier meaning
Solution Approach 1:
The patent applies parameter changes by redefining the meaning of the SSB index parameter from its traditional synchronization identification function to a reference signal indication function for link monitoring and measurement. This parameter redefinition allows the same SSB index to serve dual purposes: identifying synchronization signals and indicating reference signals for beam management, thereby improving indication accuracy without adding separate identifier systems
Solution Approach 2:
The patent implements multi-functionality by enabling the SSB index to perform multiple functions simultaneously. The SSB index not only identifies the synchronization signal block but also indicates the reference signal for link monitoring and measurement, and further represents QCL relationship information. This universal approach eliminates the need for separate identifier systems while maintaining comprehensive beam information indication
2Productivity
If the QCL relationship is not directly carried in the SSB but obtained through SSB QCL indexes, then the information transmission efficiency is improved, but the difficulty of detecting and measuring beam information increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the SSB index acts as a mediator between the SSB and the reference signal indication. Instead of directly carrying QCL relationship information in the SSB, the system uses the SSB index as an intermediate reference that terminals can use to obtain QCL relationship information through configured associations, reducing direct information overhead while maintaining detectability
Solution Approach 2:
The patent applies preliminary action by pre-configuring the association relationships between SSB indexes and QCL relationships through higher-layer signaling. The network device预先 configures the mapping relationships and QCL parameter associations, so that terminals can directly retrieve beam information based on pre-established rules without performing complex real-time detection and measurement
Data Source
AI summary
Implementations of the present disclosure provide a method and apparatus for indicating a reference signal, a terminal, and a network device. The method includes: the terminal receives first configuration information, wherein the first configuration information includes first indication information, the first indication information is used for indicating the reference signal for use in link quality measurement, and the first indication information is first index information representing a transmitting position of the reference signal or second index information representing a OCL relationship of the reference signal.