Secondary Cell State Control for Carrier Aggregation
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Solution Overview
Problem
Carrier aggregation in mobile communication systems experiences significant delays when transitioning a secondary cell from a dormant to an activation state, leading to unsatisfactory service quality and network performance due to complex procedures and power consumption issues.
Innovation Solution
A method and apparatus for controlling the state of a secondary cell by receiving SCell state indication information through RRC messages or MAC control elements, configuring the state as activation or dormant, and transmitting channel state information based on CQI configuration, allowing for efficient state transitions and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented to transmit and receive large amounts of data at high speed, then data transmission capacity is improved, but procedure complexity increases
Solution Approach 1:
The patent segments the SCell state management into distinct states (activation state and dormant state) with clearly defined transition conditions. By dividing the state space and specifying unique procedures for each state, the overall system complexity is reduced while maintaining high data transmission capacity through carrier aggregation.
2Ease of operation
If SCell transitions from dormant state to activation state to enable data transmission, then service responsiveness is improved, but time delay increases due to complex procedures
Solution Approach 1:
The patent applies preliminary action by performing essential measurements and maintaining configuration information while the SCell is in the dormant state. This allows the cell to be quickly activated when needed, as the preliminary work is already completed, thereby reducing the time delay during state transition while maintaining service responsiveness.
3Ease of operation
If SCell remains in activation state to enable quick data transmission, then service satisfaction is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamics by introducing a dormant state that allows the SCell to be dynamically adjusted between activation and dormancy based on traffic conditions. This dynamic state management enables the system to maintain service satisfaction when needed while reducing power consumption during low-activity periods, optimizing the trade-off between performance and energy usage.
4Reliability
If complex procedures are performed for SCell state transition to ensure reliable activation, then reliability is improved, but time delay increases
Solution Approach 1:
The patent applies local quality by defining specific, localized procedures for each state transition scenario rather than applying uniform complex procedures universally. Each state (activation and dormant) has tailored measurement and reporting requirements, ensuring reliable activation while minimizing unnecessary procedures that would increase time delay.
Data Source
AI summary
Provided is a method of controlling states of a secondary cell by a user equipment. The method may include receiving SCell state indication information indicating a state for the SCell from a base station through an RRC message or a MAC control element, configuring the state of the SCell in an activation state or a dormant state on the basis of the SCell state indication information, and transmitting channel state information for the SCell to the base station in accordance with CQI configuration information configured for the SCell.