User Terminal Inter-Slot Frequency Hopping Control
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Solution Overview
Problem
In future radio communication systems, there is a need to appropriately control the pattern of inter-slot frequency hopping for uplink channels/signals, especially when different access bandwidths are configured for multiple user terminals.
Innovation Solution
A user terminal is equipped with a transmitting section to transmit an uplink control channel over multiple slots and a control section to manage frequency hopping of the uplink control channel between slots, allowing for flexible control of inter-slot frequency hopping patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-slot frequency hopping is implemented for uplink control channels over multiple slots, then frequency diversity and receiving performance are improved, but control of hopping patterns becomes complex when different access bandwidths are configured for multiple user terminals
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting frequency hopping patterns based on access bandwidth parameters. Different user terminals with different access bandwidths are assigned appropriate hopping patterns through parameter configuration, allowing the system to adapt frequency hopping behavior to specific terminal capabilities while maintaining receiving performance improvements.
Solution Approach 2:
The patent implements dynamic control of frequency hopping patterns where the hopping behavior is not fixed but adapts based on terminal-specific access bandwidth configurations. This dynamic approach allows the system to optimize hopping patterns for each terminal's bandwidth while maintaining overall system coordination, resolving the complexity issue.
2Reliability
If frequency resources hop between multiple slots for uplink control channels, then frequency diversity gain is achieved, but resource allocation and hopping boundary determination become more difficult
Solution Approach 1:
The patent applies preliminary action by pre-configuring frequency hopping patterns and resource allocations before actual transmission. The base station determines and notifies user terminals of the hopping patterns in advance, allowing terminals to prepare their transmissions accordingly. This preliminary configuration simplifies the complexity of real-time resource allocation while maintaining frequency diversity benefits.
Solution Approach 2:
The patent uses signaling messages as an intermediary between the base station and user terminals to convey frequency hopping pattern information. This intermediary mechanism facilitates coordinated resource allocation by transmitting hopping pattern configurations from the base station to terminals, making the complex resource allocation process manageable and detectable.
3Reliability
If long PUCCH transmission over multiple slots is supported, then uplink control information can be transmitted with better reliability, but design issues arise regarding resource allocation and frequency hopping patterns
Solution Approach 1:
The patent applies local quality by tailoring frequency hopping patterns and resource allocations to specific user terminals based on their individual access bandwidths. Each terminal receives a customized hopping pattern suited to its bandwidth characteristics, rather than applying a uniform pattern to all terminals. This localized approach improves reliability for each terminal while managing overall system design complexity.
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
The present invention is designated to appropriately control inter-slot frequency hopping of an uplink channel/signal. A user terminal of the present invention includes a transmitting section that transmits an uplink control channel over a plurality of slots and a control section that controls frequency hopping of the uplink control channel between the plurality of slots.