DRX Timer Suspension During Communication Interruption
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Solution Overview
Problem
Existing DRX technologies fail to account for interruptions in communication, leading to DRX timers timing out and causing unsuccessful UE communications due to the UE entering the DRX inactive state without monitoring the PDCCH.
Innovation Solution
Suspend the currently running DRX timer during interruptions in communication and resume its operation when the communication resumes, ensuring the DRX timer does not time out during interruptions, thereby maintaining the UE in the DRX active state for successful communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the DRX timer continues to run during communication interruption, then the timer maintains continuous counting, but the timer times out during interruption causing UE to enter DRX inactive state and miss PDCCH monitoring
Solution Approach 1:
The patent applies the dynamics principle by making the DRX timer's running state flexible rather than fixed. The timer dynamically adjusts its operation based on communication status: it runs during normal communication, suspends during interruption, and resumes when communication restores. This dynamic state change prevents premature timeout while maintaining energy-saving benefits of DRX.
Solution Approach 2:
The patent implements preliminary action by suspending the timer before actual timeout occurs during interruption periods. The system proactively pauses timer counting when interruption is detected, preventing the timer from reaching its timeout threshold during these periods, and thereby avoiding unnecessary transition to DRX inactive state.
2Use of energy by moving object
If the UE enters DRX inactive state after timer timeout during interruption, then energy consumption is reduced, but the UE cannot monitor PDCCH for UL grant or DL assignment
Solution Approach 1:
The patent resolves this contradiction by making the DRX state transition dynamic rather than automatic. The system monitors communication status and only transitions to DRX inactive state when the timer actually times out during normal operation. During interruptions, the timer suspension prevents premature timeout, allowing the UE to remain in DRX active state and successfully receive PDCCH transmissions when needed.
3Reliability
If the DRX timer is suspended during communication interruption, then the timer does not timeout during interruption, but the timer must be resumed after interruption ends
Solution Approach 1:
The patent applies feedback by implementing a mechanism that detects communication interruption status and uses this information to control timer operation. The system continuously monitors whether communication is interrupted and accordingly suspends or resumes the timer, creating a closed-loop control system that adapts timer behavior to actual communication conditions.
Solution Approach 2:
The patent introduces an intermediary control mechanism (the suspension/resumption logic) that mediates between the timer and the communication state. This intermediary layer translates communication interruption events into timer state changes, managing the complexity of coordinating multiple timing functions with communication status without requiring direct complex interactions between all components.
Data Source
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AI summary
The present disclosure relates to a timer control method, including: when a terminal is in an discontinuous reception (DRX) active state, in response to an interruption of a preset communication, suspending a currently running DRX timer; when the preset communication is resumed, continuing to run the DRX timer. According to the embodiments of the present disclosure, when the preset communication is interrupted, a currently running DRX timer is suspended, and when the preset communication is resumed, the DRX timer continues to run. Accordingly, it can be ensured that the DRX timer does not continue to run during the interruption of the preset communication, and it is ensured that the DRX timer does not time out during the interruption of the preset communication, so that when the preset communication resumes from the interruption and continues to run, the DRX timer does not time out, that is, the UE is still in the DRX active state to monitor the PDCCH, thereby ensuring that certain communications of the UE can be executed successfully.