Uplink Control Channel Multiplexing for Priority Overlap Resolution
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in controlling uplink transmissions with different priorities that overlap in the time domain, particularly when multiple UL transmissions have varying priority levels, leading to collisions and inefficiencies in resource management.
Innovation Solution
A terminal is equipped with a control section that manages the simultaneous transmission of uplink control and shared channels, employing multiple steps to resolve overlaps between UL transmissions with the same or different priorities, ensuring appropriate control and multiplexing of UL signals to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous transmission of multiple UL transmissions with different priorities is allowed, then system capacity and service diversity are improved, but transmission control complexity and collision resolution difficulty increase
Solution Approach 1:
The patent segments the UL transmission control into multiple priority levels (first priority and second priority). When transmissions overlap, the system divides them into priority groups and applies different handling rules to each group, enabling manageable control of multi-priority transmissions without requiring complex global coordination.
Solution Approach 2:
The patent introduces priority parameters to characterize different UL transmissions. By assigning priority levels to transmissions and using these parameters to determine transmission behavior (simultaneous transmission vs. multiplexing), the system manages complexity through parameter-based control rather than complex procedural logic.
2Productivity
If UL transmissions with different priorities are multiplexed on the same channel, then resource utilization is improved, but signal interference and transmission reliability may deteriorate
Solution Approach 1:
The patent applies different quality levels to different priority transmissions. High-priority transmissions receive preferential treatment in terms of resource allocation and protection, while low-priority transmissions accept lower quality resources. This local quality differentiation ensures that critical transmissions maintain reliability even when multiplexed with lower-priority traffic.
Solution Approach 2:
The patent introduces priority levels as an intermediary mechanism that mediates between conflicting transmission requirements. The priority parameter acts as a mediator that determines resource allocation, multiplexing behavior, and conflict resolution, enabling reliable simultaneous operation of multiple transmissions with different quality requirements.
3Reliability
If priority-based control is implemented for overlapping UL transmissions, then collision resolution is improved, but control signaling overhead and processing complexity increase
Solution Approach 1:
The patent performs preliminary classification of UL transmissions into priority groups before actual transmission conflict occurs. By pre-assigning priority levels and pre-determining handling rules for each priority combination, the system resolves collisions through simple rule lookup rather than complex real-time decision-making, reducing processing complexity during actual transmission conflicts.
Data Source
AI summary
UL transmission is appropriately controlled even when a plurality of UL transmissions having different priorities overlap. A terminal according to an aspect of the present disclosure includes: a control section that controls simultaneous transmission of an uplink control channel and an uplink shared channel in at least one of a plurality of steps when, in at least one of a case in which a plurality of UL transmissions having a same priority overlap and a case in which a plurality of UL transmissions having different priorities overlap, the overlap is resolved using the plurality of steps; and a transmitting section that performs the UL transmissions in which the overlap is resolved.