Uplink Inter-Slot Frequency Hopping Control for User Terminals
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Solution Overview
Problem
Future radio communication systems face challenges in appropriately controlling inter-slot frequency hopping patterns for uplink channels and signals, as access bandwidths differ per user terminal, necessitating flexible control of frequency hopping positions and timings.
Innovation Solution
A user terminal and radio communication method that enables flexible control of inter-slot frequency hopping by determining frequency resources and hopping patterns based on higher layer signaling, DCI, and implicit information, allowing user terminals to manage frequency hopping without explicit network notification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit network notification is used to control frequency hopping, then frequency hopping control precision is improved, but signaling overhead increases
Solution Approach 1:
The user terminal autonomously determines frequency hopping patterns by combining received higher layer signaling parameters with implicit information from DCI formats, eliminating the need for explicit network notification of hopping patterns. The terminal uses its own processing capabilities to generate frequency hopping sequences based on configured parameters like hopOffset and hoppingBandwidth, reducing signaling overhead while maintaining control precision.
Solution Approach 2:
The network pre-configures frequency hopping parameters (hopOffset, hoppingBandwidth, nFrequencyHopping) through higher layer signaling before actual data transmission. These preliminary configurations enable the terminal to autonomously determine hopping patterns without requiring real-time explicit notifications, thereby reducing signaling overhead while maintaining precise frequency hopping control.
2Adaptability or versatility
If frequency hopping is controlled per user terminal, then adaptability to different access bandwidths is improved, but system complexity increases
Solution Approach 1:
The system applies different frequency hopping parameters (hopOffset, hoppingBandwidth) tailored to each user terminal's specific access bandwidth and service requirements. Each terminal receives customized frequency hopping configurations that match its local conditions, enabling adaptive frequency resource allocation without requiring complex centralized control for each terminal's specific scenario.
Solution Approach 2:
The system dynamically adjusts frequency hopping parameters (hopOffset, hoppingBandwidth, nFrequencyHopping) based on each user terminal's access bandwidth and service type. By changing these parameters according to terminal-specific conditions, the system achieves high adaptability while maintaining manageable complexity through standardized parameter adjustment mechanisms rather than custom control logic for each terminal.
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
Inter-slot frequency hopping of an uplink channel/signal is appropriately controlled. A user terminal according to the present invention includes: a transmission section that transmits an uplink data channel over a plurality of slots; and a control section that controls frequency hopping of the uplink data channel between the plurality of slots.