NES Controller Cell Deactivation for O-RAN Energy Efficiency
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Solution Overview
Problem
In O-RAN systems, focusing solely on energy efficiency can lead to a deterioration in service quality, necessitating technologies that enhance energy efficiency while maintaining service quality.
Innovation Solution
A method and apparatus for a network energy saving (NES) controller that determines which cells to deactivate or activate based on energy saving intents and quality of service (QoS) degradation intents, ensuring that all user equipment (UE) can handover to adjacent cells and maintaining acceptable QoS levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If cells are deactivated to improve energy efficiency, then energy consumption is reduced, but service quality deteriorates
Solution Approach 1:
The system performs preliminary actions by checking handover capability and QoS requirements before deactivating cells. The NES controller evaluates whether all UEs in a cell can successfully handover to neighboring cells and whether QoS requirements can be maintained, ensuring service quality is preserved before energy-saving deactivation occurs.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring QoS degradation intent and handover status. The NES controller receives feedback about QoS requirements and handover completion status, and adjusts cell activation/deactivation decisions accordingly to maintain service quality while achieving energy savings.
2Loss of energy
If all UEs are handed over to target cells before deactivation, then energy saving is achieved, but handover failure risk increases if QoS requirements are not met
Solution Approach 1:
The system performs preliminary verification of QoS requirements and handover capability before executing cell deactivation. The NES controller checks whether target cells can meet QoS requirements for all UEs before initiating handover, preventing handover failures and ensuring reliable service continuation.
Solution Approach 2:
The system applies preliminary anti-action by preventing deactivation of cells that would cause QoS degradation or handover failure. The NES controller identifies and protects cells that are critical for maintaining service quality, avoiding premature deactivation that would lead to service deterioration.
Data Source
AI summary
A method of an NES controller comprises: receiving a first NES intent instructing additional energy saving; determining a first cell to be deactivated based on the first NES intent; obtaining a first UE list of all UEs served by the first cell; determining whether all UEs included in the first UE list are capable of handover; in response to determining that all UEs included in the first UE list are capable of handover, transmitting a handover instruction command to a first base station managing the first cell, so that all UEs included in the first UE list are handed over to individual target cells; and in response to receipt of a handover complete message for all UEs included in the first UE list from the first base station, transmitting deactivation instruction information of the first cell to the first base station.