SCell Timer Control by BWP Type for Reduced State Transition Delays
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Solution Overview
Problem
Inefficient use of secondary cells (SCells) leads to unnecessary state transitions in wireless communication systems, particularly in 3GPP 5G NR technology, resulting in delays and resource wastage.
Innovation Solution
Implementing a method to control activation and deactivation of SCells using first and second timers based on RRC and MAC control elements, with dormant BWPs to maintain SCells in standby mode until needed, reducing unnecessary transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If SCells are kept in standby mode to reduce unnecessary state transitions, then state transition delays are minimized, but the ability to quickly activate SCells when needed may be compromised
Solution Approach 1:
The patent applies preliminary action by maintaining SCells in a standby state with configured parameters (such as timing advance values and downlink reference signals) before actual activation is needed. This allows the SCells to be quickly activated when required without undergoing full initialization procedures, thus reducing state transition delays while preserving fast activation capability.
Solution Approach 2:
The patent implements dynamics by creating a flexible cell state management system that can transition between different states (activated, deactivated, standby) based on real-time needs. The system dynamically adjusts the operational state of SCells using timers and control elements, allowing optimization of both transition speed and activation responsiveness according to varying network conditions.
2Productivity
If timers are used to control SCell activation and deactivation, then resource utilization is optimized, but system complexity increases
Solution Approach 1:
The patent applies self-service by implementing self-managing timer mechanisms that automatically handle SCell activation and deactivation based on predefined conditions. The timers operate autonomously to monitor inactivity periods and trigger state transitions without requiring continuous external control, thereby optimizing resource utilization while keeping the control logic relatively simple and maintainable.
Solution Approach 2:
The patent utilizes parameter changes by adjusting timer values and threshold parameters to optimize the balance between resource savings and activation speed. By configuring different timer durations and state transition parameters, the system can adapt to varying network conditions and traffic patterns, achieving efficient resource utilization without overly complex control mechanisms.
Data Source
AI summary
The present disclosure provides a method, performed by a terminal, of controlling activation of a secondary cell (SCell), the method including: receiving a radio resource control (RRC) message including information about a first timer for deactivation of a SCell and information about a second timer for deactivation of a bandwidth part (BWP) of the SCell; receiving a media access control (MAC) control element (CE) for changing a state of the SCell; and controlling the first timer and the second timer based on the MAC CE and the RRC message.