User Terminal Synchronization Signal Block Control Channel Configuration
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Solution Overview
Problem
In future radio communication systems like 5G, there is a need for an appropriate method to notify user terminals of control channel configuration domain information using synchronization signal blocks, specifically for downlink control channels, as existing methods are inadequate.
Innovation Solution
A user terminal is designed with a reception section to receive synchronization signal blocks containing bit information for control resource set configuration, and a control section that adjusts this information based on subcarrier spacing and frequency band to control downlink control channel reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed notification method for control channel configuration is used in SS blocks, then the system complexity is reduced, but the adaptability to different subcarrier spacings and frequency bands deteriorates
Solution Approach 1:
The notification method dynamically adapts the control channel configuration information in SS blocks based on the subcarrier spacing and frequency band being used. The system selects different notification methods from multiple candidates according to the actual transmission conditions, enabling flexible adaptation to varying system parameters while maintaining manageable complexity through standardized selection criteria.
Solution Approach 2:
The invention changes the notification method parameters according to the subcarrier spacing and frequency band. Different notification methods are selected based on these parameter variations, allowing the system to optimize control channel configuration for each specific operating condition rather than using a fixed approach for all scenarios.
2Adaptability or versatility
If multiple notification methods are supported for different subcarrier spacings and frequency bands, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The user terminal employs dynamic selection among multiple notification methods based on the detected subcarrier spacing and frequency band. This dynamic approach enables the terminal to adapt to different system configurations without permanently implementing all possible notification methods, thereby reducing overall device complexity while maintaining full adaptability.
Solution Approach 2:
The user terminal autonomously determines which notification method to use based on the system parameters it detects. The terminal self-configures its reception behavior according to the subcarrier spacing and frequency band without requiring complex external control, simplifying the device architecture while achieving adaptive notification.
3Ease of operation
If the control resource set configuration is not properly adapted to different frequency bands, then the ease of operation is maintained, but the communication efficiency deteriorates
Solution Approach 1:
The notification method changes the control resource set configuration parameters according to the frequency band and subcarrier spacing. This parameter adaptation ensures that the control channel is efficiently configured for each operating condition, improving communication efficiency while maintaining ease of operation through automated parameter selection.
Data Source
AI summary
To appropriately notify information of a control channel configuration domain in a radio communication system that uses a synchronization signal block, one aspect of a user terminal according to the present invention includes: a reception section that receives a Synchronization Signal (SS) block including given bit information indicating a configuration of a control resource set; and a control section that decides contents of the given bit information according to a subcarrier-spacing and/or a frequency band applied to transmission of the SS block, and controls reception of a downlink control channel.