Data Inactivity Timer Control During DAPS Handover
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Solution Overview
Problem
In wireless communication networks, cell handover processes often result in data transceiving interruptions and latency due to the interruption of radio resource control (RRC) connections during handovers, particularly in dual active protocol stack (DAPS) handovers, where data inactivity timers can cause failures leading to additional interruptions and increased power consumption.
Innovation Solution
A method for controlling data inactivity timers based on the dual active protocol stack (DAPS) handover process, where the timer is started or stopped depending on the handover state to prevent unnecessary RRC connection releases, thereby reducing interruptions and improving reliability and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If data inactivity timer is started during handover process, then power consumption is reduced by releasing RRC connection, but data transmission reliability deteriorates due to additional interruptions
Solution Approach 1:
The patent applies dynamics by making the data inactivity timer configurable and adjustable based on handover status. The timer is dynamically controlled to be suspended or extended during handover processes, allowing the system to adapt timing parameters to current operational conditions rather than using a fixed timer value. This resolves the contradiction by dynamically adjusting timer behavior to prevent premature RRC connection releases during handover while maintaining power efficiency during normal operation.
Solution Approach 2:
The patent changes the parameter of timer expiration threshold based on handover detection. When handover is detected, the system modifies the timer parameter by suspending or extending it, thereby changing the condition under which RRC connection release occurs. This parameter change ensures that the timer does not trigger during handover processes, preventing additional interruptions while still enabling power-saving releases during genuine inactivity periods.
2Use of energy by stationary object
If data inactivity timer is used to release RRC connection, then power consumption is reduced, but data transceiving interruptions increase during handover
Solution Approach 1:
The system dynamically adjusts the data inactivity timer based on handover status, suspending or extending the timer during handover processes. This dynamic control prevents the timer from expiring during handover, thereby avoiding additional data transceiving interruptions while maintaining the power-saving benefit of RRC connection release during genuine inactivity periods.
Solution Approach 2:
The patent implements preliminary action by detecting handover status in advance and proactively adjusting the timer behavior before expiration can occur. By monitoring handover indicators and preemptively suspending or extending the timer, the system prevents potential interruptions before they happen, ensuring continuous data transceiving during handover while preserving power efficiency.
3Reliability
If RRC connection is maintained during handover, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RRC connection state contingent on timer expiration conditions rather than being fixed. The connection is maintained dynamically based on whether the timer has expired, allowing the system to release connections during genuine inactivity (saving power) while maintaining connections during handover (preserving reliability) through adaptive timer control.
Solution Approach 2:
The system changes the timer parameter during handover to prevent expiration and subsequent connection release. By adjusting the timer parameter (suspending or extending it) based on handover detection, the system ensures RRC connection maintenance during handover for reliability while allowing normal expiration-based releases during idle periods for power saving.
4Reliability
If data inactivity timer is extended or suspended during DAPS handover, then data transmission reliability is improved by preventing failures, but device complexity increases
Solution Approach 1:
The patent applies dynamics by implementing conditional timer control based on handover detection. The timer behavior (normal operation vs. suspension/extension) dynamically changes based on the detected handover status, allowing reliable operation during handover while maintaining simple default behavior during normal operation. This conditional approach manages complexity by only activating special handling when needed.
Solution Approach 2:
The patent applies local quality by implementing timer extension or suspension specifically during DAPS handover periods rather than globally. The special timer handling is localized to the specific handover context, leaving normal timer operation unchanged during regular periods. This localized approach improves reliability only where needed (during handover) while minimizing the impact on overall system complexity.
Data Source
AI summary
A method, communication device, and computer readable medium for data inactivity timer control in order to improve the reliability of data transmission. The reliability of the data transmission is improved by: determining an operation for starting a data inactivity timer according to whether a terminal is in a dual active protocol stack (DAPS) handover process in response to the occurrence of a data inactivity timer starting event.