DCI Power Saving Indication for UE Energy Optimization
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Solution Overview
Problem
Current communication technologies lack a specific design for power saving information indication in Downlink Control Information (DCI), which is essential for optimizing power usage in user equipment (UE) operations.
Innovation Solution
A method and system for configuring DCI to carry power saving information, including specific power saving schemes or mapping relations between schemes, allowing UE to skip monitoring the Physical Downlink Control Channel (PDCCH) during designated time windows, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE continuously monitors PDCCH for control information, then scheduling reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the UE alternates between active monitoring periods and sleep periods. During active periods, the UE monitors PDCCH for scheduling information; during sleep periods, the UE stops monitoring to save power. This periodic action resolves the contradiction by maintaining scheduling reliability during active periods while reducing power consumption during sleep periods.
Solution Approach 2:
The patent introduces dynamic adjustment of monitoring parameters including configurable monitoring occasions, bandwidth parts (BWPs), and aggregation levels. The network can dynamically configure when and how the UE should monitor PDCCH based on traffic conditions, allowing the system to adapt between high reliability modes (frequent monitoring) and low power modes (infrequent monitoring) depending on current needs.
2Adaptability or versatility
If DCI payload size is increased to include more power saving information, then power saving indication capability is improved, but processing complexity increases
Solution Approach 1:
The patent segments power saving information into multiple DCI formats (DCI format 2_0 for slot format indication, DCI format 2_1 for pre-emption indication, DCI format 2_2 for power control, DCI format 2_3 for SRS power control). Each DCI format carries specific types of power saving information, allowing the system to provide comprehensive power saving indication capability while keeping each individual DCI payload manageable in size and processing complexity.
Solution Approach 2:
The patent makes existing DCI formats multi-functional by adding power saving indication capabilities to them. For example, DCI format 2_0 originally carried slot format indication and now also carries power saving information. This universality approach improves power saving indication capability without requiring entirely new DCI structures, thereby limiting the increase in processing complexity.
3Use of energy by moving object
If UE skips PDCCH monitoring during power saving periods, then power consumption is reduced, but scheduling responsiveness deteriorates
Solution Approach 1:
The patent uses wake-up signals (WUS) and go-to-sleep signals sent before the actual monitoring period to prepare the UE in advance. The network can indicate to the UE whether it should wake up to monitor PDCCH or can skip to the next monitoring occasion. This preliminary action allows the UE to optimize its power consumption while maintaining scheduling responsiveness because the UE is prepared in advance for upcoming scheduling opportunities.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports its power saving status and scheduling requirements to the network. The network uses this feedback to adjust the monitoring configuration dynamically, balancing power consumption and scheduling responsiveness based on actual UE needs and network conditions.
Data Source
AI summary
The present disclosure provides a power saving indication method, a network side device and a user equipment, the power saving indication method includes configuring DCI, the DCI carries power saving information of at least one user equipment the power saving information is used to indicate at least one power saving scheme or a mapping relation between at least two power saving schemes.