PDCCH Sleep Time Control for Flexible DRX Power Saving
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Solution Overview
Problem
Existing power consumption in terminal devices is not optimally managed due to inflexible monitoring of the physical downlink control channel (PDCCH) using the discontinuous reception (DRX) mechanism, which lacks granularity and flexibility.
Innovation Solution
A method for monitoring PDCCH with enhanced flexibility by receiving sleep time sets and indication information from a network device to determine specific time periods for stopping PDCCH monitoring, allowing for two granularities of DRX cycles or time units, and optionally including actions like switching bandwidth parts and deactivating serving cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal device uses the DRX mechanism to monitor PDCCH, then power consumption is reduced, but monitoring flexibility is insufficient
Solution Approach 1:
The patent introduces dynamic sleep time adjustment by allowing the network device to configure multiple sleep time sets (M sets) with different time lengths, and dynamically select appropriate sleep times from these sets based on actual monitoring needs. This transforms the static DRX mechanism into a dynamic system that can adapt monitoring duration to different scenarios, resolving the contradiction between power saving and monitoring flexibility.
Solution Approach 2:
The patent changes the parameter of sleep time from a fixed value to a selectable set of values (M sleep time sets with different time lengths). The network device can indicate different sleep time indices to adjust monitoring behavior dynamically. This parameter change enables flexible control of monitoring duration while maintaining power consumption benefits, addressing the flexibility deficiency in traditional DRX.
2Adaptability or versatility
If the terminal device monitors PDCCH continuously, then monitoring flexibility is improved, but power consumption increases
Solution Approach 1:
The patent segments the monitoring time into multiple configurable sleep time sets, where each set contains different time length options. This segmentation allows the system to divide monitoring into finer time granularities (e.g., different DRX cycle lengths), enabling flexible selection of appropriate monitoring intervals based on traffic patterns, thus reducing unnecessary continuous monitoring and lowering power consumption.
Solution Approach 2:
The patent implements periodic monitoring with configurable periods by allowing selection from multiple sleep time sets. Instead of continuous monitoring, the terminal device monitors PDCCH at periodic intervals determined by the selected sleep time. This periodic action maintains monitoring flexibility while significantly reducing power consumption compared to continuous monitoring.
3Use of energy by moving object
If the DRX cycle is used for monitoring control, then power consumption is reduced, but monitoring precision is insufficient
Solution Approach 1:
The patent adds another dimension to the DRX mechanism by introducing multiple sleep time sets (M sets) with different time lengths, rather than using a single DRX cycle parameter. This dimensional expansion allows the system to select appropriate time granularities from multiple options, improving monitoring precision for different scenarios while maintaining power consumption benefits through selective use of longer sleep times when appropriate.
Data Source
AI summary
A method and/or a communications apparatus controls a monitoring of a physical downlink control channel. The method includes: receiving, by a terminal device, a first message sent by a network device, where the first message includes M sleep time sets, and the sleep time is used to indicate a time length in which monitoring the PDCCH is stopped; receiving, by the terminal device, a second message sent by the network device, where the second message includes sleep time indication information, the sleep time indication information is used to indicate a target sleep time index, and the target sleep time index is an index in the M sleep time sets; and stopping, by the terminal device, monitoring the PDCCH in a target time period.