PUCCH Cell Switching for Uplink Control Efficiency
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing PUCCH cell switching and activation/deactivation status within a PUCCH group, leading to suboptimal performance and increased battery consumption in devices supporting multiple carrier aggregations.
Innovation Solution
Implementing a dynamic and semi-static PUCCH carrier switching mechanism based on DCI scheduling and RRC-configured cell timing patterns, allowing for flexible numerology and periodicity configurations to optimize PUCCH resource allocation and reduce unnecessary cell activations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic PUCCH cell switching is implemented to enhance uplink control information transmission efficiency, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic PUCCH cell switching by configuring multiple candidate PUCCH cells within a PUCCH group and enabling the wireless device to switch between different PUCCH cells based on scheduling decisions. The network can dynamically indicate which PUCCH cell should be used for transmitting uplink control information, allowing the system to adapt to varying transmission conditions and optimize efficiency while managing complexity through controlled dynamic behavior.
Solution Approach 2:
The patent segments the PUCCH functionality by dividing the PUCCH group into multiple candidate PUCCH cells, each capable of handling uplink control information transmission. This segmentation allows the system to distribute the transmission load across multiple cells and switch between them based on current needs, thereby improving overall transmission efficiency while containing the complexity within manageable segments.
2Productivity
If multiple PUCCH cells are configured to improve transmission efficiency, then productivity is improved, but battery consumption increases
Solution Approach 1:
The patent implements periodic monitoring and evaluation of PUCCH cell performance, where the wireless device periodically assesses transmission conditions and switches between PUCCH cells based on predefined criteria. This periodic action allows the system to maintain optimal transmission efficiency while avoiding continuous high-power operation, thereby managing battery consumption through rhythmic, condition-based switching rather than continuous operation.
Solution Approach 2:
The wireless device autonomously monitors transmission conditions and automatically selects the most appropriate PUCCH cell for uplink control information transmission without requiring constant network intervention. This self-service capability enables the device to optimize transmission efficiency while managing its own power consumption based on real-time conditions, reducing the need for high-power continuous operation.
3Loss of energy
If dynamic cell activation/deactivation is implemented to reduce unnecessary cell activations, then energy consumption is reduced, but reliability may deteriorate
Solution Approach 1:
The patent incorporates feedback mechanisms where the wireless device continuously monitors the operational status and transmission quality of PUCCH cells. Based on this feedback, the system dynamically activates or deactivates specific PUCCH cells, ensuring that only necessary cells remain active. This feedback-driven approach maintains transmission reliability by adapting cell activation status to actual transmission needs while minimizing energy consumption from unnecessarily active cells.
Solution Approach 2:
The patent configures multiple candidate PUCCH cells in advance within the PUCCH group, preparing them for potential activation based on predicted transmission conditions. This preliminary configuration allows the system to quickly activate the most suitable cell when needed without delays, maintaining reliability while enabling energy-efficient deactivation of cells that are not currently required, thus reducing overall energy consumption.
Data Source
AI summary
A wireless device may transmit one or more capability information elements. The wireless device may receive, based on its capability, a configuration parameter of a time-domain pattern indicating first timings that a first cell in a PUCCH group and second timings, including a transmission timing, that a second cell in the PUCCH group is the cell configured for PUCCH transmission. The wireless device may transmit uplink control information in the transmission timing via the second cell or via the first cell based on the activation state of the second cell in the transmission timing.