User Terminal Sync Raster Detection via Bit Information Interpretation
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Solution Overview
Problem
In future radio communication systems, the allocation of synchronization signal blocks and broadcast channels at non-central frequency positions in NR systems complicates initial access, leading to potential delays and increased power consumption due to the difficulty in identifying search candidate positions.
Innovation Solution
A user terminal is equipped with a receiving section to detect synchronization signal blocks and a control section that interprets bit information from the synchronization signal block to variably adjust the sync raster detection, allowing for efficient identification of the correct sync raster and reducing the need for sequential searches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the SS/PBCH block is allocated at a non-central frequency position, then frequency resource utilization is improved, but the difficulty of identifying search candidate positions increases
Solution Approach 1:
The patent introduces an intermediary parameter (offset value) that mediates between the non-central frequency allocation and the search process. The offset value serves as a reference that guides the UE to correctly identify the SS/PBCH block position without requiring exhaustive search, thus resolving the contradiction between resource utilization and detection difficulty
Solution Approach 2:
The network performs preliminary action by pre-configuring and indicating the offset value to the UE before the UE attempts to detect the SS/PBCH block. This advance information provision enables the UE to directly calculate the frequency position without sequential searching, solving the identification difficulty while maintaining flexible resource allocation
2Area of stationary object
If sequential search of sync raster is performed, then coverage is improved, but access delay increases
Solution Approach 1:
The patent implements feedback mechanism where the network provides offset information to the UE based on the allocated SS/PBCH block position. This feedback enables the UE to adjust its search strategy from blind sequential search to targeted detection, reducing access delay while maintaining coverage through the same sync raster search structure
3Reliability
If sequential search of sync raster is performed, then all possible positions are checked, but power consumption increases
Solution Approach 1:
The network performs preliminary action by providing offset information that enables the UE to skip unnecessary search steps. This advance guidance maintains detection reliability by ensuring the correct position is identified, while significantly reducing power consumption by avoiding exhaustive sequential searching of all sync raster positions
Data Source
AI summary
To prevent occurrence of delay and/or increase in power consumption at the time of access to a network in future radio communication systems, one aspect of a user terminal according to the present disclosure includes: a receiving section that receives a synchronization signal block including a broadcast channel in a certain sync raster; and a control section that controls, based on certain bit information of a certain information element included in the synchronization signal block, a sync raster to be detected by variably interpreting bit information included in at least one of the certain information element and another information element.