RRC Inactive Frequency Measurement for Fast Carrier Aggregation
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G and IoT networks, require efficient methods for terminals to quickly measure frequencies and report measurement results to enable fast configuration of carrier aggregation and dual connectivity.
Innovation Solution
A method and apparatus for frequency measurement in wireless communication systems, allowing user equipment (UE) to perform frequency measurement in RRC inactive mode based on configuration information and report results promptly, enabling base stations to quickly configure carrier aggregation or dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency measurement is performed in RRC connected mode, then measurement accuracy is ensured, but measurement time and network configuration delay increase
Solution Approach 1:
The patent applies preliminary action by configuring frequency measurement parameters and criteria before the UE enters RRC inactive mode. The network pre-configures measurement objects, reporting configurations, and thresholds so that when the UE needs to report measurements, it can quickly retrieve and execute pre-prepared measurement tasks rather than setting everything from scratch, thus reducing measurement time while maintaining accuracy
2Productivity
If frequency measurement is performed in RRC idle mode, then measurement speed is improved, but measurement precision and reliability deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting measurement parameters based on the UE's RRC state. When in RRC inactive mode, the UE applies relaxed measurement parameters (such as reduced measurement frequency or simplified measurement objects) that enable faster execution. The network receives these measurements and adjusts subsequent configuration parameters accordingly, allowing speed in inactive mode while maintaining overall precision through adaptive parameter adjustment
3Measurement precision
If comprehensive frequency measurement configuration is provided, then measurement accuracy is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent applies segmentation by dividing frequency measurement configuration into multiple levels: essential parameters provided in RRC release message for immediate use, and detailed parameters provided through system information blocks or on-demand RRC messages. This hierarchical segmentation allows the UE to perform basic measurements with minimal configuration while enabling comprehensive measurements when needed, thus improving accuracy without proportionally increasing overall system complexity
Data Source
AI summary
A frequency measurement method performed by a user equipment (UE) in a wireless communication system is provided. The frequency measurement method includes: receiving a radio resource control (RRC) release message or system information including first frequency measurement configuration information for frequency measurement in an RRC inactive mode; performing frequency measurement in the RRC inactive mode based on the first frequency measurement configuration information; receiving first RRC resume message including an indicator requesting a measurement report in the RRC inactive mode; and transmitting an RRC resume complete message including the measurement report based on the indicator.