Terminal PUCCH Carrier Switching Timing Pattern Adjustment
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Solution Overview
Problem
Current semi-static PUCCH carrier switching technologies do not adequately address the de-activation of Scells, leading to challenges in determining the appropriate cell for transmitting control information from a terminal to a base station.
Innovation Solution
A terminal is equipped with a control section that determines a cell for transmitting control information based on a timing pattern, and a transmission section that transmits this information in the determined cell. When the timing pattern includes an Scell to be de-activated, the pattern is changed before the Scell is de-activated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal uses a fixed timing pattern for PUCCH carrier switching, then the cell determination is simple, but the system cannot adapt when an Scell is de-activated
Solution Approach 1:
The patent implements dynamic timing pattern adjustment by allowing the terminal to modify the PUCCH carrier switching timing pattern when an Scell is de-activated. Instead of using a fixed predetermined pattern, the terminal dynamically changes the pattern to exclude the de-activated Scell, ensuring continuous and reliable control information transmission while adapting to changing network conditions.
2Reliability
If the terminal continues to use a timing pattern including a de-activated Scell, then the original timing pattern is maintained, but control information transmission fails
Solution Approach 1:
The patent applies preliminary action by having the terminal proactively change the timing pattern before attempting to transmit control information on a de-activated Scell. The terminal monitors the activation status of Scells and preemptively adjusts the PUCCH carrier switching pattern to exclude de-activated cells, preventing transmission failures before they occur.
3Adaptability or versatility
If the timing pattern is changed frequently to adapt to Scell activation/de-activation, then the system remains adaptable, but the complexity of pattern management increases
Solution Approach 1:
The patent implements feedback mechanisms where the terminal continuously monitors the activation status of Scells and uses this feedback information to adjust the PUCCH carrier switching timing pattern. The terminal receives activation/de-activation commands from the base station and dynamically modifies its timing pattern accordingly, creating a closed-loop system that adapts to network conditions while maintaining manageable complexity through event-driven updates.
Data Source
AI summary
This terminal comprises a control unit that determines a cell to transmit control information on the basis of a timing pattern indicating the order of cells to transmit the control information, and a transmitting unit that transmits the control information in the determined cell. If the timing pattern includes Scell to be de-activated, the timing pattern is changed before Scell is de-activated.