Search Space Configuration for Multi-Numerology Radio Control
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in controlling transmission and reception when different numerologies (subcarrier spacing and bandwidth) are used, which can lead to improper signal transmission and reception, potentially decreasing throughput.
Innovation Solution
A user terminal with a receiving section and control section that detects and configures search spaces for downlink control channels using different subcarrier spacings and transmission cycles, allowing for flexible configuration of common and user-specific search spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing LTE control techniques are applied to systems with different numerologies, then implementation simplicity is maintained, but proper transmission and reception of signals may be disabled and throughput decreases
Solution Approach 1:
The patent applies parameter changes by configuring search spaces with different subcarrier spacings and transmission cycles according to the specific numerology being used. Instead of using fixed LTE parameters, the system dynamically adjusts search space parameters (subcarrier spacing, transmission cycle) to match the active numerology, ensuring proper signal detection while maintaining implementation feasibility through standardized configuration procedures.
2Reliability
If different subcarrier spacings and transmission cycles are configured for common and user-specific search spaces, then proper communication is enabled in systems with different numerologies, but system complexity increases
Solution Approach 1:
The patent applies segmentation by separating the control channel into distinct common search spaces and user-specific search spaces, each with independently configurable subcarrier spacings and transmission cycles. This segmentation allows the system to optimize each search space type for its specific function while managing complexity through modular configuration rather than requiring complete reconfiguration of the entire control channel structure.
Solution Approach 2:
The patent implements dynamics by allowing the search space configuration (subcarrier spacing, transmission cycle) to be dynamically adjusted based on the active numerology. The system can switch between different configurations depending on which numerology is currently in use, providing adaptability without requiring permanent complex hardware structures for all possible configurations simultaneously.
Data Source
AI summary
The present invention is designed so that communication is performed appropriately in radio communication systems that support different numerologies than existing LTE systems. A receiving section that receives a downlink control channel, and a control section that controls the detection of search spaces that serve as candidates for allocating the downlink control channel are provided, and the control section controls the detection of a common search space and a user-specific search space, in which different subcarrier spacings and/or different transmission cycles are configured.