Dormant Secondary Cell Group CQI Reporting for Power Savings
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing power consumption when managing dormant secondary cell groups (SCGs) due to inefficient channel quality indicator (CQI) reporting, leading to unnecessary power drain.
Innovation Solution
Implementing a configuration for split bearers and adjusting CQI reporting based on discontinuous reception status and the presence of high-priority data, with reduced reporting frequency to conserve power in SCGs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CQI reporting is performed frequently on dormant SCG, then channel quality information is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic CQI reporting on dormant SCG where the WTRU transmits CQI at configured intervals rather than continuously. The network configures the periodicity of CQI reports, allowing the WTRU to maintain channel quality information while consuming less power by entering low-power states between reporting instances.
Solution Approach 2:
The patent enables dynamic adjustment of CQI reporting behavior based on network conditions and data presence. The WTRU can switch between different reporting modes (frequent, periodic, or on-demand) depending on whether high-priority data is detected, allowing adaptive power management while maintaining measurement precision when needed.
2Use of energy by moving object
If CQI reporting frequency is reduced to save power, then power consumption decreases, but channel quality information becomes less accurate
Solution Approach 1:
The patent implements feedback mechanisms where the network receives CQI reports from the WTRU and uses this information to make scheduling decisions. The feedback loop allows the network to adjust downlink allocations based on channel conditions, maintaining effective communication even with reduced reporting frequency by reporting only when conditions change significantly or when high-priority data requires attention.
Solution Approach 2:
The patent changes the reporting parameters dynamically based on data priority. When high-priority data is detected, the WTRU increases CQI reporting frequency to maintain accurate channel quality information. When no high-priority data is present, reporting frequency is reduced to save power, accepting lower measurement precision during these low-activity periods.
3Adaptability or versatility
If split bearer configuration is implemented, then data transmission flexibility is improved, but device complexity increases
Solution Approach 1:
The patent implements split bearer configuration where data bearers are divided into MCG (Master Cell Group) and SCG (Secondary Cell Group) parts. This segmentation allows flexible data transmission by routing different data flows through different cell groups based on channel conditions and data priority, improving adaptability while the network manages the complexity of configuration.
Data Source
AI summary
A method and device for power savings on a dormant secondary cell group are disclosed. In an approach, a wireless transmit receive unit (WTRU) may receive, from a network, a report configuration to report a channel quality indicator to a master cell group, MCG, or a secondary cell group, SCG, based on the received configuration (e.g. comprising different periodicities in order to report the CQI). In an approach, the channel quality indicator may be transmitted with a decreasing regularity. In an approach, the channel quality indicator may be transmitted with a period (periodicity) that depends on a discontinuous reception status of the MCG. In an approach, the channel quality indicator may be transmitted depending on a presence of high priority data (e.g. number of DCIs received, preemption indication, LCH priority; PDCCH).