Uplink Control Resource Selection for Positive and Negative SR
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Solution Overview
Problem
The study for future radio communication systems, such as NR, has not sufficiently addressed the appropriate radio resources for transmitting uplink control information (UCI), leading to potential degradation in communication throughput and frequency use efficiency.
Innovation Solution
A user terminal is designed to transmit first and second UCI using either the same or different frequency resources, with specific configurations determined by the control section to optimize resource allocation for positive and negative scheduling requests (SR).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal transmits a scheduling request signal and a physical uplink shared channel signal simultaneously in PUCCH and PUSCH resources, then communication efficiency is improved, but signal collision and interference occur causing transmission failure
Solution Approach 1:
The terminal performs preliminary determination to identify whether it has both a scheduling request signal and a physical uplink shared channel signal to transmit before actual transmission occurs. Based on this preliminary identification, the terminal proactively selects which signal to transmit first or combines them appropriately, preventing signal collision and interference at the source while maintaining communication efficiency.
2Reliability
If a terminal prioritizes transmission of one signal over another, then signal transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The terminal dynamically adjusts transmission priorities based on the specific type of signals involved. When a scheduling request signal and a physical uplink shared channel signal are both present, the terminal determines transmission order based on signal characteristics and channel conditions, allowing flexible adaptation rather than fixed prioritization. This dynamic approach ensures reliable transmission while minimizing unnecessary delays.
3Productivity
If multiple signals are transmitted simultaneously using different resource types, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The terminal segments the transmission management process into distinct determination steps: first identifying whether a scheduling request signal is present, then identifying whether a physical uplink shared channel signal is present, and finally determining the appropriate transmission strategy based on this segmented analysis. This segmented approach simplifies the overall management complexity while enabling efficient multi-signal transmission.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A user terminal according to one aspect of the present disclosure includes a transmitting section that transmits first uplink control information (UCI) including a positive scheduling request (SR) or second UCI including a negative SR using a certain resource, and a control section that, in order to specify the certain resource, determines to use which of a first configuration and a second configuration, the first configuration being for transmitting the first UCI and the second UCI using the same frequency resource, the second configuration being for transmitting the first UCI and the second UCI using different frequency resources. According to one aspect of the present disclosure, reduction in communication throughput and the like can be suppressed even if a new UL control channel is used to transmit the UCI.