User Equipment Conditional Measurement for Offloading in Dense Small Cells
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Solution Overview
Problem
In dense deployments of small cells, intensive inter-frequency measurements are necessary for offloading, which increases UE power consumption and can lead to service interruptions, as current systems perform measurements regardless of cell presence on the frequency list.
Innovation Solution
The UE only performs measurements on frequencies corresponding to a cell list if at least one cell is detected during the cell search procedure, applying layer 3 filtering and distinguishing between macro and small cells based on cell identifiers, and only continuing measurements if the detected cell is listed for offloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If intensive inter-frequency measurements are performed for offloading in dense small cell deployments, then offloading capability is improved, but UE power consumption increases
Solution Approach 1:
The patent applies partial action by performing measurements only when necessary - specifically, measurements are conducted only when a cell from the offloading list is detected during cell search. This selective measurement approach avoids continuous intensive measurements while maintaining offloading capability when needed, thereby reducing UE power consumption without sacrificing offloading functionality.
Solution Approach 2:
The patent changes the measurement parameter from continuous to conditional based on cell detection status. The measurement behavior is dynamically adjusted: measurements are performed on frequencies corresponding to the cell list only when at least one cell from the list is detected, otherwise measurements are skipped. This parameter change optimizes the balance between offloading capability and power consumption.
2Adaptability or versatility
If intensive inter-frequency measurements are performed for offloading, then offloading capability is improved, but serving cell service interruption time increases
Solution Approach 1:
The patent implements partial measurement action by conducting measurements only when cells from the offloading list are detected. This selective approach reduces the total measurement time and frequency of service interruptions compared to continuous measurements, while still enabling offloading when appropriate conditions are met.
Solution Approach 2:
The patent performs cell search and detection as a preliminary step before initiating measurements. By first detecting whether cells from the offloading list are present, the system prepares measurement conditions in advance, avoiding unnecessary measurements and reducing service interruption time when offloading is not applicable.
3Measurement precision
If measurements are performed on all frequencies regardless of cell presence, then measurement completeness is maintained, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating measurement behavior based on local conditions - specifically, whether cells from the offloading list are detected. Measurements are performed with full completeness only on frequencies where relevant cells are present, while skipping measurements on frequencies without such cells. This localized approach maintains measurement precision where needed while reducing overall power consumption.
Solution Approach 2:
The patent performs measurements partially - only when necessary for offloading decisions. By conditioning measurements on cell detection results, the system maintains measurement completeness for relevant cells while avoiding redundant measurements on frequencies without offloading candidates, thus reducing power consumption without sacrificing essential measurement accuracy.
Data Source
AI summary
There is provided a method of performing measurement. The method may be performed by a user equipment (UE) and comprise: receiving, by the UE, a cell list from a serving cell; if at least one cell in the cell list is detected, performing, by the UE, measurements on a frequency corresponding to the cell list and applying layer 3 filtering for the measurements; and if any cell in the cell list is not detected, not performing the measurements on the frequency corresponding to the cell list.