Adaptive PDCCH Monitoring with Extended DRX Timers
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Solution Overview
Problem
The challenge in wireless communication systems is to efficiently manage limited radio resources for data and control information transmission while minimizing latency and power consumption, particularly in applications sensitive to delay or latency.
Innovation Solution
Implementing an on-duration timer and an extended duration timer for PDCCH monitoring, allowing the UE to continue monitoring the PDCCH during the extended duration timer if it is not detected during the on-duration timer, and transmitting or receiving data based on PDCCH detection during the extended duration timer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE continuously monitors the PDCCH to ensure low latency, then the latency is reduced, but the power consumption increases
Solution Approach 1:
The patent implements dynamic PDCCH monitoring duration adjustment based on detected conditions. The UE monitors PDCCH for a first duration (on-duration timer), and if no PDCCH is detected, extends the monitoring duration to a second duration (extended duration timer). This dynamic adjustment allows the system to balance between continuous monitoring for low latency and reduced monitoring for power saving, resolving the contradiction between latency and power consumption.
Solution Approach 2:
The patent changes the monitoring duration parameter based on detection results. By introducing two different monitoring durations (first duration and second duration) and switching between them based on whether PDCCH is detected, the system optimizes the balance between latency performance and power consumption. This parameter change approach directly addresses the technical contradiction.
2Reliability
If the UE monitors PDCCH for a longer duration to capture video traffic data, then the data reception reliability is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the PDCCH monitoring duration based on traffic type detection. For video traffic data, the system extends the monitoring duration to ensure reliable data reception. This dynamic adjustment allows the system to maintain high reliability for critical data while reducing power consumption during normal operation, resolving the contradiction between reliability and power consumption.
Solution Approach 2:
The system uses feedback from PDCCH detection results to determine whether to extend monitoring duration. When video traffic data is detected or anticipated, the feedback mechanism triggers extended monitoring to ensure complete data reception. This feedback-based approach ensures reliability when needed while avoiding unnecessary power consumption during normal conditions.
3Use of energy by moving object
If the UE uses DRX mode to reduce power consumption, then the power consumption is reduced, but the latency increases
Solution Approach 1:
The patent enhances DRX mode with dynamic monitoring duration adjustment. Instead of using a fixed monitoring duration, the system adapts the monitoring length based on detected conditions (first duration for normal conditions, second duration for extended monitoring). This dynamic enhancement of DRX allows the system to maintain low latency when needed while preserving the power saving benefits of DRX mode, resolving the contradiction between power consumption and latency.
Solution Approach 2:
The patent segments the PDCCH monitoring process into two distinct phases: initial monitoring during on-duration timer and extended monitoring during extended duration timer. This segmentation allows the system to apply different monitoring strategies for different scenarios, enabling the UE to balance between power saving (by limiting initial monitoring) and latency (by providing extended monitoring option), thus resolving the DRX contradiction.
Data Source
AI summary
The present disclosure relates to a method of performing operations for a User Equipment (UE) in a wireless communication system. In particular, the method includes configuring an on-duration timer and an extended duration timer related to the on-duration timer; based on a physical downlink control channel (PDCCH) not being detected during the on-duration timer is running, starting the extended duration timer after expiring the on-duration timer; monitoring the PDCCH during the extended duration timer is running; and based on the PDCCH being detected during the extended duration timer is running, transmitting or receiving data based on the PDCCH.