NR-U Terminal RSSI Measurement Bandwidth Configuration
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Solution Overview
Problem
The measurement bandwidth for Received Signal Strength Indicator (RSSI) is not sufficiently clarified in 3GPP Release 16 NR-U, limiting the configuration of RSSI and channel occupancy measurements for NR-U terminals.
Innovation Solution
A method is introduced where a terminal configures a frequency resource for measurement based on an information element indicating a center frequency or measurement bandwidth, allowing explicit configuration of these parameters by the base station, enabling appropriate RSSI and channel occupancy measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSSI measurement bandwidth is not explicitly configured, then the system maintains simplicity in measurement configuration, but the measurement precision and channel occupancy detection accuracy are insufficient
Solution Approach 1:
The patent applies parameter changes by introducing configurable measurement bandwidth parameters (subcarrier spacing, number of resource blocks) and center frequency parameters that can be dynamically adjusted. This allows the RSSI measurement precision to be improved by explicitly configuring the measurement bandwidth, while the system maintains flexibility to adapt to different channel conditions and requirements.
Solution Approach 2:
The patent segments the unlicensed frequency band into configurable measurement bandwidths consisting of specific numbers of resource blocks with defined subcarrier spacings. This segmentation allows precise control over the measurement scope, enabling accurate RSSI measurements on specific frequency resources while maintaining system simplicity through standardized segmentation units.
2Adaptability or versatility
If measurement bandwidth is fixed, then the configuration is simple, but the adaptability to different channel conditions and frequency resources is limited
Solution Approach 1:
The patent implements dynamics by making the measurement bandwidth configurable through parameters such as subcarrier spacing (15 kHz or 30 kHz) and the number of resource blocks. This dynamic configuration capability allows the system to adapt to different channel conditions, frequency resources, and measurement requirements, while the base station controls the configuration to maintain operational simplicity.
Solution Approach 2:
The patent creates a universal measurement configuration framework that can be applied across different NR-U scenarios and channel conditions. The configurable parameters (center frequency, bandwidth, subcarrier spacing) provide a multi-functional solution that works for various measurement purposes including RSSI, channel occupancy, and interference detection, reducing the need for separate configurations for different scenarios.
Data Source
AI summary
A terminal includes a receiving unit that receives a signal; a control unit that configures a frequency resource to be measured based on an information element indicating a center frequency or a measurement bandwidth, wherein the information element is included in the signal received by the receiving unit; and a transmitting unit that transmits a result of a Received Signal Strength Indicator (RSSI) measurement or a result of a channel occupancy measurement, wherein the RSSI measurement or the channel occupancy measurement is performed on the frequency resource to be measured that is configured by the control unit.