Spatial Adaptation Energy Saving via Antenna Port Change Indication
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Solution Overview
Problem
In 5G networks, the Radio Access Network (RAN), particularly the Active Antenna Unit (AAU), consumes significant energy, and existing spatial adaptation methods for energy saving can corrupt channel state information (CSI) due to changes in antenna elements or ports, affecting beam management and interference estimation.
Innovation Solution
A system where a first device receives a change indication from a second device regarding active antenna ports, allowing it to perform measurements or receive physical channels considering the changed antenna ports, thereby adapting CSI measurement and reporting for improved energy saving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If spatial adaptation is implemented to save energy by changing antenna elements or ports, then energy consumption is reduced, but channel state information accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by notifying the first device of antenna element or port changes before actual CSI measurement is affected. The change indication triggers the first device to adjust its measurement strategy in advance, preventing CSI corruption while maintaining energy savings from spatial adaptation.
Solution Approach 2:
The system implements feedback through the change indication mechanism. The second device monitors antenna element or port changes and provides feedback to the first device, enabling the first device to adapt its CSI measurement and reporting accordingly. This closed-loop feedback ensures measurement accuracy is maintained despite spatial adaptation activities.
2Use of energy by moving object
If antenna elements or ports are changed for spatial adaptation, then energy saving is achieved, but beam management and interference estimation are affected
Solution Approach 1:
The system takes preliminary action by notifying the first device of upcoming antenna changes through change indication. This allows the first device to prepare appropriate beam management and interference estimation strategies before the spatial adaptation occurs, maintaining reliability while achieving energy savings.
Solution Approach 2:
The change indication mechanism provides feedback about antenna configuration changes to the first device. This feedback enables the first device to adjust beam management and interference estimation procedures accordingly, ensuring these functions remain reliable despite spatial adaptation activities.
3Use of energy by moving object
If spatial adaptation is performed without notification, then energy consumption is reduced, but CSI measurement and reporting become corrupted
Solution Approach 1:
The system performs preliminary action by sending change indication before spatial adaptation affects CSI measurements. This advance notification allows the first device to adjust its measurement and reporting procedures, preventing information loss while maintaining energy consumption benefits.
Solution Approach 2:
The change indication serves as feedback information about upcoming antenna changes. This feedback enables the first device to synchronize its CSI measurement and reporting with the spatial adaptation schedule, preventing corruption and maintaining information quality.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of spatial adaptation for energy saving. The method comprises: receiving, at a first device from a second device, a change indication indicating at least one antenna port of which at least one antenna element is changed. The antenna port is active before and after the change. The method further comprises performing at least one of a measurement of at least one reference signal or a reception of a physical channel in consideration of the at least one antenna port. In this way, the first device may be informed about impact of spatial adaptation of the second device and is able to adapt the impacted channel state information measurement and/or reporting. As such, energy saving can be achieved.