User Terminal Search Space Adaptation for Multiple Numerologies
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Solution Overview
Problem
Future radio communication systems face challenges in decoding downlink control channels due to the use of multiple numerologies, leading to potential throughput drops and communication quality deterioration.
Innovation Solution
A user terminal is designed to monitor downlink control information with different search space-related parameters for each numerology, allowing for flexible configuration of aggregation levels, blind decoding candidates, and CRC/C-RNTI lengths to support multiple numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple numerologies are used in future radio communication systems, then communication flexibility and service diversity are improved, but downlink control channel decoding reliability deteriorates
Solution Approach 1:
The patent segments the downlink control channel monitoring process by creating separate search space configurations for each numerology. The terminal device monitors different search spaces (first search space for first numerology, second search space for second numerology) with distinct parameters, allowing independent optimization for each numerology type and ensuring reliable decoding despite multiple numerologies being used
Solution Approach 2:
The patent implements dynamic adaptability by configuring search space parameters (aggregation level, blind decoding candidates, CRC/C-RNTI length) differently for each numerology based on channel conditions and service requirements. This dynamic configuration allows the system to optimize control channel monitoring for each specific numerology while maintaining overall system flexibility
2Device complexity
If multiple numerologies are used with existing LTE control methods, then system complexity is reduced, but communication quality deteriorates
Solution Approach 1:
The patent creates a universal search space configuration framework that works across multiple numerologies. By defining a standardized method for configuring search spaces with numerology-specific parameters, the system maintains a unified control structure that can handle different numerologies without requiring completely separate control mechanisms for each, thus avoiding excessive complexity while ensuring communication quality
3Ease of manufacture
If unified search space parameters are used for multiple numerologies, then configuration simplicity is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies local quality optimization by configuring search space parameters specifically for each numerology based on its characteristics. Different aggregation levels, blind decoding candidate counts, and CRC lengths are assigned to different numerologies according to their specific requirements, ensuring optimal resource utilization for each numerology type while maintaining overall system efficiency
Data Source
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AI summary
The present invention is designed to allow communication based on appropriate numerologies even when multiple numerologies are used. According to one aspect of the present invention, a user terminal has a receiving section that monitors downlink control information by assuming a plurality of communication parameters that relate to a frequency domain and/or a time domain, and a control section that judges that at least part of parameters that relate to a search space for monitoring the downlink control information is different, for each of the communication parameters.