SPCell Channel Measurement Configuration for PUCCH Reliability
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Solution Overview
Problem
In small cell systems with dual connectivity, there is a lack of efficient measurement configuration and process to ensure that secondary primary cells (SPCells) have good channel conditions for reliable transmission of physical uplink control channels (PUCCHs), as their channel conditions are not comparable with primary cells (PCell) and existing methods do not effectively manage SPCells.
Innovation Solution
An apparatus and method for configuring channel measurement, where a terminal is configured with a measurement object and reporting configuration to compare the channel conditions of neighboring cells with those of the SPCell, reporting criteria are satisfied when the neighboring cell's conditions are better than the SPCell's by a predefined value or meet specific threshold values, allowing for optimal selection of SPCells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement configuration for SPCell is not implemented, then the complexity of the system is reduced, but the reliability of PUCCH transmission in small cell systems deteriorates
Solution Approach 1:
The patent segments the measurement configuration into separate components: measurement objects for SPCell, specific reporting criteria for SPCell quality, and separate evaluation rules. This allows targeted measurement configuration for SPCell without overwhelming complexity, enabling reliable PUCCH transmission through dedicated measurement mechanisms.
Solution Approach 2:
The patent implements preliminary measurement configuration for SPCell before PUCCH transmission begins. The measurement objects, reporting criteria, and evaluation rules are pre-configured to ensure that SPCell quality is assessed in advance, guaranteeing reliable transmission conditions are met before actual PUCCH operation.
2Measurement precision
If existing measurement methods are used for SPCell, then the device complexity is minimized, but the measurement precision for comparing neighboring cells with SPCell deteriorates
Solution Approach 1:
The patent applies local quality by creating measurement-specific criteria tailored to SPCell characteristics. Different measurement objects and reporting thresholds are configured specifically for SPCell compared to regular cells, enabling precise channel condition assessment adapted to the local requirements of small cell PUCCH transmission.
Solution Approach 2:
The patent changes measurement parameters specifically for SPCell evaluation, including customized reporting criteria (e.g., A3 event with specific offsets, A4 event with absolute thresholds) that differ from standard cell measurement parameters. This enables precise comparison between neighboring cells and SPCell by adjusting measurement sensitivity and evaluation thresholds.
Data Source
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AI summary
Embodiments of the present disclosure provide a method for configuring channel measurement, a channel measurement method, an apparatus and a communication system. The method includes: configuring a terminal with a measurement object and reporting configuration; wherein the measurement object indicates a frequency needing to be measured, and the reporting configuration indicates a measurement report condition, the measurement report condition being that a measurement result of a neighboring cell is better than a sum of a measurement result of a cell transmitting a PUCCH to which a secondary eNB corresponds (SPCell) and a predefined order value, or being that a measurement result of a neighboring cell is better than a first threshold value and a measurement result of an SPCell is worse than a second threshold value, and the neighboring cell being a cell at the frequency indicated in the measurement object. With the methods, apparatuses and communication system of the embodiments of the present disclosure, channel conditions of a cell transmitting a PUCCH to which a secondary eNB corresponds in a small cell system may be ensured efficiently.