Base Station SSB-Less Operation for Network Energy Saving
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in energy consumption and network performance due to the continuous transmission of synchronization signal blocks (SSBs), which can be optimized by implementing SSB-less operations in base stations under specific conditions.
Innovation Solution
A base station is configured to receive a message indicating SSB-less operation and adaptively suspend the transmission of SSBs based on network conditions, thereby reducing unnecessary energy consumption and improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSB transmissions are continuously performed to maintain network coverage and synchronization, then network reliability is improved, but energy consumption increases
Solution Approach 1:
The base station dynamically adjusts SSB transmission behavior based on real-time network conditions. When a UE is in RRC_IDLE or RRC_INACTIVE state and no other UEs are present, the base station suspends SSB transmissions. When UEs are in RRC_CONNECTED state or multiple UEs are present, the base station resumes SSB transmissions. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.
Solution Approach 2:
The base station changes the transmission parameter of SSB from continuous transmission to suspended transmission based on UE states and network conditions. By monitoring UE RRC states and adjusting the SSB transmission parameter accordingly, the system achieves energy savings while maintaining necessary network functionality.
2Use of energy by moving object
If SSB transmissions are suspended to save energy, then energy consumption is reduced, but network performance deteriorates
Solution Approach 1:
The base station applies different SSB transmission strategies to different UE groups based on their RRC states. UEs in RRC_IDLE or RRC_INACTIVE states experience suspended SSB transmissions for energy savings, while UEs in RRC_CONNECTED states continue to receive SSB transmissions to maintain network performance. This localized differentiation resolves the contradiction by applying quality variations to different parts of the system.
Solution Approach 2:
The system dynamically switches between SSB suspension and continuation based on real-time monitoring of UE states and network conditions, ensuring energy savings are achieved without permanently compromising network performance for connected users.
3Reliability
If SSB transmissions are performed without adaptation to network conditions, then network coverage is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The base station dynamically adapts SSB transmission behavior based on monitored network conditions including UE RRC states and presence of multiple UEs. This dynamic adjustment maintains necessary network coverage while avoiding unnecessary transmissions, thereby improving resource utilization efficiency.
Solution Approach 2:
The base station monitors network conditions and UE states, using this feedback information to make intelligent decisions about SSB transmission. The feedback loop ensures that SSB transmissions are performed only when necessary for maintaining coverage, optimizing resource utilization.
Data Source
AI summary
A base station distributed unit receives, from a base station central unit, a message indicating synchronization signal block (SSB)-less operation of a cell. After receiving the message, the base station does not transmit an SSB of the cell.