Dynamic SSB Set Switching for Energy-Saving 5G Synchronization
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Solution Overview
Problem
The always-on SSB transmission in 5G NR systems leads to unnecessary energy consumption and inefficient CSI measurement and reporting, especially in energy-saving configurations, due to the semi-static configured SSB transmission pattern not reflecting real-time spatial domain characteristics.
Innovation Solution
A method for a UE to dynamically adjust SSB transmission patterns based on signaling, allowing for alternating SSB sets during active and inactive periods, reducing energy consumption while maintaining communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSB transmission is always-on to ensure continuous synchronization coverage, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic SSB transmission with configurable periods (e.g., 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms) instead of continuous transmission. The SSB burst is transmitted in periodic intervals with defined burst lengths and periodicities, allowing the network to maintain synchronization coverage while significantly reducing energy consumption during low-traffic periods.
Solution Approach 2:
The patent introduces dynamic SSB transmission patterns that can be adjusted based on network conditions, traffic load, and energy-saving requirements. The transmission configuration includes dynamic parameters such as ssb-PositionsInBurst bitmap patterns, periodicity settings, and burst lengths that can be modified through RRC signaling to adapt to changing operational requirements.
2Device complexity
If SSB transmission pattern is semi-statically configured, then device complexity is reduced, but adaptability to real-time spatial domain characteristics deteriorates
Solution Approach 1:
The patent enables dynamic adjustment of SSB transmission patterns through RRC signaling while maintaining relatively simple UE implementation. The network can update ssb-PositionsInBurst configurations, periodicity, and burst parameters based on real-time spatial domain characteristics and beam management requirements, allowing adaptability without significantly increasing UE complexity.
Solution Approach 2:
The patent changes key transmission parameters including ssb-PositionsInBurst bitmap patterns, periodicity values, and burst lengths to adapt to different spatial domain characteristics. These parameter changes allow the system to optimize beam sweeping patterns and synchronization coverage based on real-time network conditions while keeping the underlying transmission mechanism relatively simple.
3Area of stationary object
If multiple SSBs are transmitted to support beam sweeping, then coverage area is improved, but CSI reporting overhead increases
Solution Approach 1:
The patent uses periodic SSB bursts with configurable periodicities and burst lengths to provide comprehensive beam sweeping coverage. By transmitting SSBs in periodic bursts rather than continuously, the system maintains adequate coverage area while reducing the total number of SSB transmissions, thereby lowering CSI measurement and reporting overhead.
Solution Approach 2:
The patent segments the SSB transmission into multiple bursts with different ssb-PositionsInBurst patterns configured for different UEs or different time periods. This segmentation allows the network to distribute coverage responsibilities across multiple smaller SSB sets, reducing the CSI reporting burden for individual UEs while maintaining overall coverage area.
Data Source
AI summary
The embodiments of the disclosure provide a method of communication operation and a UE. The method includes: receiving a first signaling for indicating a first information related to a first set of Synchronization Signal/PBCH Block (SSB); and receiving a second signaling for indicating a second information related to a second set of SSB.