User Terminal UCI Transmission Control for Overlapping Timings
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Solution Overview
Problem
In future radio communication systems, user terminals face challenges in appropriately controlling the transmission of multiple pieces of uplink control information (UCI) for diverse communication requirements, such as eMBB and URLLC, leading to unmet requirements and decreased radio resource efficiency.
Innovation Solution
A user terminal with a transmitting section and a control section that manages the transmission of UCI using uplink control channels or shared channels, employing maximum coding rates and format configurations to ensure appropriate control, even when transmission timings overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the user terminal transmits multiple pieces of UCI corresponding to multiple communications, then the coverage of control information is improved, but the transmission control becomes complex and requirements may not be met
Solution Approach 1:
The patent changes the parameter of coding rate selection based on the type of communication (eMBB or URLLC). When URLLC UCI is present, the system selects a first coding rate; when only eMBB UCI is present, it selects a second coding rate. This parameter change enables appropriate control of multiple UCI transmissions while meeting different communication requirements.
2Loss of information
If the user terminal transmits multiple pieces of UCI with overlapping transmission timings, then the information completeness is improved, but the radio resource usage efficiency decreases
Solution Approach 1:
The patent extracts and prioritizes URLLC UCI from the mixture of multiple UCIs. When transmission timings overlap, the system identifies URLLC UCI as high-priority information that must be transmitted, while eMBB UCI can be adjusted or deferred. This extraction approach ensures complete information transmission while optimizing radio resource usage by focusing resources on critical URLLC communications.
Data Source
AI summary
An aspect of a user terminal of the present invention includes a transmitting section that transmits a plurality of pieces of uplink control information (UCI) corresponding to a plurality of communications by using an uplink control channel or an uplink shared channel, and a control section that controls a transmission of at least a part of the plurality of pieces of UCI, based on a format of the uplink control channel or a maximum coding rate configured for the uplink shared channel when transmission timings of the plurality of pieces of UCI overlap each other.