User Terminal Uplink Control Information Reporting via Bandwidth Constraints
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in maintaining communication throughput and spectral efficiency due to interference from strong interference waves when using sequence-based PUCCH, which can lead to failed detection of uplink control information (UCI) by base stations.
Innovation Solution
A user terminal determines signals for transmitting uplink control information using a frequency resource with a bandwidth equal to or greater than a predetermined bandwidth, assuming the availability of orthogonal resources to prevent interference and ensure proper UCI reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequence-based PUCCH is used for uplink control information transmission, then device complexity is reduced, but reliability deteriorates due to strong interference waves from nearby cells using the same sequence and orthogonal resource
Solution Approach 1:
The patent changes the bandwidth parameter of the frequency resource for sequence-based PUCCH transmission. By ensuring the bandwidth is equal to or greater than a predetermined bandwidth, the patent modifies the transmission parameters to achieve frequency diversity, which improves UCI detection reliability while maintaining the simplicity of sequence-based PUCCH structure
Solution Approach 2:
The patent introduces frequency dimension diversity by specifying a minimum bandwidth requirement for the frequency resource. This transforms the problem from a single-frequency transmission vulnerability to a multi-frequency transmission approach, where interference on one frequency can be compensated by other frequencies within the bandwidth
2Ease of operation
If sequence-based PUCCH is used to simplify transmission, then ease of operation is improved, but loss of information increases when base station fails to detect UCI due to interference
Solution Approach 1:
The patent modifies the bandwidth parameter of the frequency resource allocation for sequence-based PUCCH. By setting the bandwidth to be equal to or greater than a predetermined bandwidth, the patent enables frequency diversity without complicating the sequence-based transmission mechanism, thus maintaining ease of operation while preventing UCI detection failure
Solution Approach 2:
The patent implicitly introduces feedback through the bandwidth configuration. The base station determines appropriate bandwidth parameters and configures them to the user terminal, creating a feedback loop that ensures the frequency resource provides sufficient diversity to prevent information loss while maintaining transmission simplicity
Data Source
AI summary
The present invention is designed so that, even when a sequence-based uplink control channel is used, uplink control information is reported properly. A user terminal according to one aspect of the present invention has a control section that determines signals to transmit in a frequency resource for transmitting uplink control information, and a transmission section that transmits the signals in the frequency resource, and, when the signals include a signal sequence to use an orthogonal resource that is associated with the uplink control information, the control section assumes that a bandwidth of the frequency resource is equal to or greater than a predetermined bandwidth.