NR Cell Quality Derivation Ambiguity Resolution
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Solution Overview
Problem
The existing 3GPP NR specifications are ambiguous regarding which measurement object (measObject) a UE should select to perform cell quality derivation (CQD), particularly in scenarios involving multiple frequency bands and different types of reference signals.
Innovation Solution
The proposed solution involves the UE matching frequency information from the serving cell configuration with the frequency information in the measurement object to determine the correct measObject for CQD. This includes using parameters such as the absolute frequency of the SSB and the reference frequency for CSI-RS to identify the appropriate measurement object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple measurement objects are configured for different frequency bands and reference signals, then the system can support diverse measurement scenarios, but ambiguity arises in selecting the correct measurement object for cell quality derivation
Solution Approach 1:
The patent segments the measurement object selection process by introducing distinct selection criteria for different cell types (serving cell vs. neighbor cell) and different reference signal types (SSB vs. CSI-RS). This segmentation resolves the ambiguity by providing clear, separate pathways for selecting measurement objects based on the specific measurement scenario.
Solution Approach 2:
The patent applies local quality by configuring measurement objects with specific frequency information and reference signal parameters that are locally optimized for their intended purpose. Each measurement object contains tailored frequency information (absoluteFrequencySSB, absoluteFrequencyPointA) and reference signal configurations that make it suitable for specific measurement scenarios, enabling precise matching between measurement requirements and configured objects.
2Measurement precision
If frequency information matching is used to identify the correct measurement object, then selection accuracy improves, but the complexity of frequency information comparison increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring measurement objects with specific frequency information (absoluteFrequencySSB, absoluteFrequencyPointA) and reference signal parameters before measurements are performed. This preliminary configuration allows the UE to efficiently match measurement requirements with appropriate measurement objects by comparing pre-stored frequency information, reducing real-time processing complexity while maintaining high selection accuracy.
Data Source
AI summary
Systems and methods are disclosed herein for enabling a User Equipment (UE) to perform cell quality derivation in a wireless communication network utilizing parameters from an appropriate measurement object. In some embodiments, a method of operation of a UE to perform cell quality derivation in a wireless communication network includes the UE receiving, via Radio Resource Control (RRC) signaling, a measurement configuration that includes a list of measurement objects. The UE receives a serving cell configuration including frequency information that specifies an absolute frequency of a Synchronization Signal block (SSB) corresponding to a serving cell. The UE selects a measurement object in the list of measurement objects that specifies an SSB frequency having a same value as the specified absolute frequency.