SSB Beam Index Measurement for Low-Complexity Handover
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces challenges in determining synchronization signal block (SSB) information without decoding broadcast information, especially in asynchronous and burst transmissions, which complicates handover decisions and increases processing burden.
Innovation Solution
The method involves receiving multiple SSBs, identifying a repeating beam index based on a repeat parameter, associating a beam set, measuring parameters, and reporting to a serving cell, without necessarily decoding PBCH, to facilitate efficient handover decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE decodes broadcast channels to determine SSB information, then measurement accuracy is improved, but processing complexity and energy consumption increase
Solution Approach 1:
The patent extracts only the essential information needed for SSB measurement (repeat parameter, beam index) from the broadcast channel, rather than requiring full decoding of all broadcast information. This allows the UE to obtain sufficient measurement data with reduced processing complexity by taking out only the necessary elements.
Solution Approach 2:
The network performs preliminary actions by pre-configuring and transmitting the repeat parameter and SSB pattern information before the UE needs to perform measurements. This preliminary provision of key parameters enables the UE to conduct measurements without the complex task of decoding entire broadcast channels.
2Measurement precision
If the UE reports detailed SSB measurements to the serving cell, then handover decision accuracy is improved, but uplink signaling overhead increases
Solution Approach 1:
The patent applies extraction by having the UE report only the most relevant measurement results (such as the best beam index and corresponding measurement values) rather than all possible SSB parameters. This reduces uplink signaling overhead while maintaining sufficient information for accurate handover decisions.
3Measurement precision
If the network transmits complete SSB information, then UE can determine beam patterns accurately, but downlink resource consumption increases
Solution Approach 1:
The network extracts and transmits only the critical repeat parameter and essential SSB pattern information required for accurate beam pattern determination, rather than transmitting complete SSB details. This reduces downlink resource consumption and energy usage while maintaining the accuracy needed for UE measurements.
Data Source
AI summary
Aspects described herein relate to receiving multiple synchronization signal blocks (SSBs) from a target cell over a measurement time window. A repeating beam index for one or more of the multiple SSBs can be identified based at least in part on a determination of a repeat parameter indicating a number of beams in a SSB pattern for the target cell. A beam set of the one or more of the multiple SSBs determined to have the same repeating beam index can be associated. One or more parameters of the one or more of the multiple SSBs of the beam set can be measured and reported.