Synchronization Signal Blocks With Variable Periodicity for Cell-Edge UEs
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing synchronization signal block (SSB) periodicities, leading to unnecessary resource consumption and reduced spectral efficiency due to inconsistent SSB periodicities that fail to adapt to varying user equipment (UE) signal strengths.
Innovation Solution
Implementing a time cycle with varying SSB periodicities, where a first portion uses a higher periodicity for UEs with sufficient signal strength and a second portion uses a lower periodicity for UEs at the cell edge, supplemented by UE-specific tracking reference signals (TRSs) to maintain connections and reduce overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single low periodicity is used for all UEs to ensure cell edge UEs maintain connection, then connection reliability for cell edge UEs is improved, but network resource consumption increases due to unnecessary SSB transmissions for UEs with sufficient signal strength
Solution Approach 1:
The patent applies local quality by implementing different SSB periodicities for different portions of the time cycle. Specifically, a first SSB periodicity is used for a first portion of the time cycle and a second SSB periodicity for a second portion, allowing the system to optimize resource allocation for different UE groups (cell edge vs. cell center UEs) rather than using a uniform periodicity for all UEs
Solution Approach 2:
The patent implements dynamics by making the SSB periodicity variable over time within a time cycle. The network device dynamically switches between first and second SSB periodicities for different portions of the time cycle, enabling adaptive resource allocation that responds to varying UE conditions without requiring continuous reconfiguration
2Loss of energy
If a single high periodicity is used for all UEs to reduce network resource consumption, then network resource efficiency is improved, but connection reliability deteriorates for cell edge UEs with weak signal strength
Solution Approach 1:
The patent ensures that cell edge UEs receive appropriate service quality by allocating a second SSB periodicity (higher frequency) for a second portion of the time cycle, while cell center UEs with sufficient signal strength use a first SSB periodicity (lower frequency) for a first portion of the time cycle
Solution Approach 2:
The system dynamically allocates different SSB periodicities to different time portions, allowing cell edge UEs to benefit from higher periodicity transmissions during critical periods while maintaining overall network efficiency through lower periodicity during other periods
3Device complexity
If consistent SSB periodicity is used across the entire time cycle, then system simplicity is maintained, but spectral efficiency decreases due to inability to adapt to varying UE signal strengths
Solution Approach 1:
The patent introduces dynamic SSB periodicity variation within a unified time cycle framework. The network device configures multiple SSB periodicities that are applied to different portions of the time cycle, enabling adaptive spectral efficiency optimization while maintaining a relatively simple overall system structure through standardized configuration procedures
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a configuration of synchronization signal blocks (SSBs) for a time cycle, the configuration indicating a first SSB periodicity for a first portion of the time cycle and a second SSB periodicity for a second portion of the time cycle. The UE may receive multiple SSBs during the time cycle, the multiple SSBs received with the first SSB periodicity during the first portion of the time cycle and with the second SSB periodicity during the second portion of the time cycle. Numerous other aspects are described.