User Terminal Downlink Control Channel Detection for Flexible Numerologies
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in supporting different numerologies, which can lead to improper transmission and reception of signals, particularly with existing LTE systems' control techniques, potentially failing to meet requirements for various radio communication services like eMBB, IoT, mMTC, and URLLC.
Innovation Solution
A user terminal with a receiving section and control section that detects downlink control channel allocation candidates arranged in one-symbol units and over multiple symbols, enabling proper communication by configuring the downlink control channel in a plurality of symbols, thereby supporting flexible numerologies and reducing processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing LTE control techniques are used as-is in future radio communication systems with different numerologies, then device complexity is reduced, but signal transmission and reception become improper
Solution Approach 1:
The patent applies dynamics by making the control technique adaptable rather than fixed. The user terminal dynamically adjusts its detection method based on whether the downlink control channel is configured in one symbol or multiple symbols, allowing the same terminal to handle different numerologies and communication scenarios flexibly
Solution Approach 2:
The patent changes the detection parameter from a fixed single-symbol approach to a variable approach that can detect across one or multiple symbols. This parameter change enables the terminal to properly detect control channels in future radio communication systems with different numerologies while maintaining compatibility with existing LTE systems
2Adaptability or versatility
If downlink control channel is configured in multiple symbols, then adaptability to different numerologies is improved, but detection complexity increases
Solution Approach 1:
The patent segments the detection process into two distinct modes: single-symbol detection and multi-symbol detection. By segmenting the detection scope based on the channel configuration, the terminal can efficiently handle different numerologies without implementing a completely complex unified detection system
Solution Approach 2:
The detection mechanism dynamically adapts to the channel configuration. When the downlink control channel is configured in multiple symbols, the terminal activates multi-symbol detection mode; otherwise, it uses single-symbol detection mode, optimizing complexity based on actual operational requirements
3Adaptability or versatility
If flexible numerologies are supported, then service requirements are met, but processing time increases
Solution Approach 1:
The patent segments the processing into efficient single-symbol detection when possible and multi-symbol detection only when necessary. This segmentation prevents unnecessary processing time while maintaining the ability to fulfill diverse service requirements for different numerologies
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 detection of candidates for allocating the downlink control channel are provided, where, when the downlink control channel is configured in a plurality of symbols, the control section controls the detection of downlink control channel allocation candidates that are arranged in one-symbol units and downlink control channel allocation candidates that are arranged over multiple symbols.