Hibernating Cell Wake-Up Signaling for 5G Power Saving
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Solution Overview
Problem
The challenge of managing energy consumption in 5G networks due to hibernating cells, which leads to inconveniences in UE clock synchronization and location updates, and the inefficiency of existing wake-up methods that fail to accurately determine when to activate or deactivate cells, resulting in increased power consumption and service disruptions.
Innovation Solution
A wake-up procedure for hibernating cells that involves a UE determining and transmitting a wake-up signal based on preconfigured or predefined reference parameters, such as time and frequency points, to awaken a hibernating gNB, ensuring timely network service without downgrading user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cells are deactivated during low traffic periods, then energy consumption is reduced, but network service availability and responsiveness deteriorate
Solution Approach 1:
The network device performs preliminary actions by pre-configuring wake-up signal parameters and maintaining a monitoring state during hibernation. When a wake-up signal is detected, the cell can rapidly transition from hibernation to active state, ensuring service availability is maintained despite the deactivated state during low traffic periods
Solution Approach 2:
The system implements periodic monitoring for wake-up signals while in hibernation mode. The network device periodically checks for wake-up signals at predetermined intervals, allowing energy-efficient operation during low traffic while ensuring rapid response when service is needed
2Reliability
If cells remain active to ensure immediate service, then network service availability is maintained, but energy consumption increases
Solution Approach 1:
The cell operates in a dynamic state, transitioning between hibernation and active modes based on traffic conditions and wake-up signal detection. This dynamic operation allows the system to optimize energy consumption while maintaining service availability through rapid state transitions
Solution Approach 2:
The system changes operational parameters by adjusting the cell's power state between hibernation and active modes. Configuration parameters for wake-up signals are established in advance, allowing rapid parameter changes when service is required without full continuous operation
3Productivity
If wake-up signal configuration is provided in advance, then wake-up procedure efficiency is improved, but device complexity increases
Solution Approach 1:
Configuration information for wake-up signals is provided in advance during initial cell setup or reconfiguration. This preliminary configuration includes parameters such as frequency, time resources, and signal structure, which simplifies the wake-up procedure by eliminating the need for complex real-time configuration exchanges
Solution Approach 2:
The network device uses pre-configured template parameters for wake-up signals that can be reused across multiple hibernation cycles. This copying approach reduces device complexity by avoiding repeated configuration management while maintaining wake-up efficiency
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of a wake up procedure for a hibernating cell. The method comprises determining whether configuration information for transmitting a wake up signal is received from a second device, the wake up signal used for waking up the second device in a hibernation mode; in accordance with a determination that the configuration information is missed, obtaining one or more reference parameters associated with the wake up signal; and transmitting the wake up signal to the second device based on the one or more reference parameters. In this way, a hibernating network could be waked up and provide service at any time when the UE requires the network service. The requirement for reducing power consumption of 5G site can be realized and meanwhile the service to be provided to the UE is not downgraded.