Dynamic DRX Timer Adjustment for XR Terminal Power
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Solution Overview
Problem
In wireless communication networks, extended reality (XR) technology experiences jitter in data frame arrivals, leading to increased power consumption in terminals due to prolonged monitoring for data arrival.
Innovation Solution
A discontinuous reception (DRX) method is implemented, where a terminal starts a DRX on duration timer and monitors a physical downlink control channel (PDCCH) in a DRX cycle. When a new data transmission is detected, a DRX-inactivity timer is started, and the terminal continues to monitor the PDCCH. The DRX on duration timer is stopped when it does not expire and the DRX-inactivity timer expires, allowing the terminal to enter a sleep state sooner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal monitors PDCCH over a longer time range to handle data frame jitter, then the reliability of data reception is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the DRX on duration timer based on whether data is actually received. When data is received before the timer expires, the timer is stopped, transitioning from a static fixed monitoring period to a dynamic adaptive monitoring period, thereby reducing unnecessary power consumption while maintaining reliable data reception
Solution Approach 2:
The patent changes the monitoring duration parameter from a fixed value to a variable value that depends on actual data reception timing. By modifying the DRX on duration timer behavior (stopping it when data is received), the system adapts the monitoring parameter to actual needs, reducing power consumption while ensuring reliable reception
2Reliability
If the terminal continues monitoring PDCCH after data transmission to handle potential retransmissions, then the reliability of complete data reception is improved, but the power consumption increases
Solution Approach 1:
The patent segments the PDCCH monitoring period into two phases: an initial monitoring phase with the DRX on duration timer, and a potential extended phase triggered by data reception. This segmentation allows the terminal to perform basic monitoring with low power consumption, and only extend monitoring when actually needed, thus resolving the contradiction between reliability and power consumption
Data Source
AI summary
A discontinuous reception (DRX) method performed by a terminal, for example, is provided. The method includes starting a DRX on duration timer and monitoring a physical downlink control channel (PDCCH) in a DRX cycle. When the PDCCH indicates that a new data transmission is detected in the DRX cycle, a DRX-inactivity timer is started and the PDCCH is continuing to be monitored. The DRX on duration timer is stopped when at least the DRX-inactivity timer expires while the DRX on duration timer has not yet expired.