Uplink Control Channel Collision Handling in 5G NR Terminals
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Solution Overview
Problem
In future radio communication systems, specifically in the New Radio (NR) system, there is a lack of effective methods for controlling the transmission and multiplexing of uplink control information when uplink control channels and shared channels overlap in the same slot, leading to inadequate collision handling and failure to meet the requirements of ultra-reliable low-latency communications (URLLC).
Innovation Solution
A user terminal is equipped with a control section that determines the uplink control channel based on traffic types of overlapping uplink control channels and shared channels, employing techniques such as priority-based transmission and multiplexing to manage collisions effectively, even when traffic types are not distinguished.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetition transmission of uplink control channel and uplink shared channel is implemented, then transmission reliability is improved, but channel collision and resource conflict occur when channels overlap in the same slot
Solution Approach 1:
The patent changes the parameter of channel priority by introducing traffic type differentiation (eMBB vs. URLLC). The control section determines which channel to transmit based on traffic type parameters, allowing the system to dynamically adjust transmission behavior according to service requirements, thereby resolving channel collisions while maintaining reliability.
2Productivity
If multiple uplink channels are transmitted repeatedly in the same slot, then communication capacity is increased, but collision handling becomes insufficient and URLLC requirements cannot be met
Solution Approach 1:
The patent segments the uplink transmission resources by traffic type, creating separate handling paths for eMBB and URLLC channels. When channels overlap, the control section segments the transmission decision based on traffic type priorities, ensuring that URLLC transmissions are protected while maintaining overall system capacity.
Solution Approach 2:
The patent applies local quality by providing different transmission guarantees for different traffic types within the same time slot. URLLC channels receive priority treatment (higher reliability guarantee) while eMBB channels can be deferred or multiplexed, allowing the system to meet localized quality requirements for critical services while maintaining overall productivity.
3Productivity
If uplink control channel and uplink shared channel overlap in the same slot, then resource utilization is improved, but transmission control becomes inadequate and multiplexing fails
Solution Approach 1:
The patent introduces dynamic transmission control where the control section adjusts transmission decisions in real-time based on channel overlap conditions and traffic type priorities. The system dynamically switches between different transmission modes (drop, multiplex, or prioritize) depending on the specific collision scenario, making the control process adaptive rather than static.
Data Source
AI summary
A user terminal according to one aspect of the present disclosure includes: a transmitting section that transmits uplink control information; and a control section that determines an uplink control channel used for transmitting the uplink control information based on traffic types of each of a first uplink control channel and a second uplink control channel when the first uplink control channel transmitted repeatedly one or more times and the second uplink control channel transmitted repeatedly one or more times overlap in a slot.