RSSI Measurement Configuration in FR2-2 Networks
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Solution Overview
Problem
In FR2-2, if there is no serving cell for the UE, the configuration of TCI state information for RSSI measurement becomes ambiguous, leading to unclear measurement procedures.
Innovation Solution
The network configures the UE without including TCI state information in the RMTC, allowing the UE to perform RSSI measurement based on existing QCL TypeD for the latest PDCCH/PDSCH or by measuring on all Rx beams, depending on the presence or absence of serving cells in FR2-2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If TCI state information is included in RMTC configuration, then RSSI measurement can be performed with specific beam direction, but the configuration becomes complex and ambiguous when no serving cell is available
Solution Approach 1:
The patent extracts TCI state information from the RMTC configuration when the UE has no serving cell in FR2-2. By separating the TCI configuration requirement from the general RMTC setup, the system allows RSSI measurement to proceed using alternative methods (all Rx beams or QCL TypeD from other frequencies) without being constrained by missing TCI state information, thus reducing configuration complexity while maintaining measurement capability
Solution Approach 2:
The patent makes the RMTC configuration universal by enabling it to function in both scenarios: when TCI state information is available (using specific beam) and when it is not available (using all Rx beams or QCL TypeD). This multi-functionality allows the same RMTC configuration structure to adapt to different serving cell conditions, eliminating the need for separate configuration procedures
2Ease of operation
If RSSI measurement is performed without TCI state information, then measurement can proceed in all directions, but measurement precision may be reduced
Solution Approach 1:
The patent implements a dynamic measurement approach where the UE adapts its RSSI measurement method based on the availability of TCI state information and serving cell status. When TCI is available, the UE uses directed measurement for higher precision; when TCI is unavailable, the UE automatically switches to measuring all Rx beams or using QCL TypeD, ensuring the measurement procedure remains simple and adaptive without manual intervention
Solution Approach 2:
The patent changes the measurement parameters dynamically based on configuration availability. Instead of fixing the measurement method, the system allows the measurement parameters (beam selection, measurement targets) to change according to whether TCI state information is present, thereby maintaining both operational simplicity and measurement precision through parameter adaptation rather than procedural complexity
Data Source
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AI summary
One disclosure of the present specification provides a method by which a UE performs communication. The method comprises the steps of: receiving RSSI measurement time configuration (RMTC) from a base station; performing received signal strength indicator (RSSI) measurement in frequency range2-2 (FR2-2) on the basis of the RMTC; and reporting the results of the RSSI measurement to the base station, wherein on the basis of the UE having no serving cell in the FR2-2, the RMTC does not include a transmission configuration indicator (TCI) state.