UE PUCCH PUSCH Overlap Resolution via Priority Segmentation
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a need to efficiently manage overlapping uplink control channel (PUCCH) and shared channel (PUSCH) transmissions to avoid collisions and ensure reliable data transfer, as existing methods may lead to inefficient communication due to dropped transmissions and retransmissions.
Innovation Solution
A method and apparatus for a user equipment (UE) to resolve overlaps between PUCCH and PUSCH transmissions by prioritizing higher priority channels, multiplexing overlapping messages, and determining whether to transmit simultaneously or drop lower priority channels, thereby optimizing channel usage and reducing inefficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits both PUCCH and PUSCH simultaneously on different component carriers, then the communication efficiency is improved, but the probability of transmission collision increases
Solution Approach 1:
The patent segments the collision resolution process into multiple stages: first resolving overlaps within the same component carrier, then resolving overlaps across different component carriers. This hierarchical segmentation allows the system to manage complexity while maintaining both simultaneous transmission capability and collision avoidance.
Solution Approach 2:
The patent changes the parameter of transmission priority by introducing priority levels for different channel types. By assigning different priorities to PUCCH and PUSCH transmissions, the system can dynamically resolve collisions based on priority rules, ensuring reliable transmission of high-priority control information while maintaining efficient data transmission.
2Reliability
If the UE prioritizes higher priority channels during overlap resolution, then the reliability of high priority transmissions is improved, but the throughput of lower priority channels deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a priority-based resolution framework. When collisions occur, the system uses priority rules as intermediaries to determine which transmission proceeds, ensuring that high-priority control transmissions are protected while lower-priority data transmissions can still occur in non-colliding scenarios.
Solution Approach 2:
The patent applies partial action by allowing simultaneous transmissions to proceed when no collision occurs, and only applying collision resolution rules when necessary. This means the priority-based dropping mechanism is applied selectively rather than universally, maintaining throughput for non-conflicting transmissions while ensuring reliability for conflicting high-priority transmissions.
3Device complexity
If the UE resolves overlaps sequentially (first same priority, then different priority), then the complexity of collision resolution is reduced, but the resolution time increases
Solution Approach 1:
The patent segments the collision resolution process into distinct phases: Phase 1 resolves overlaps within the same component carrier, and Phase 2 resolves overlaps across different component carriers. This segmentation reduces the complexity of each individual resolution step while maintaining comprehensive collision handling through a structured two-stage approach.
Data Source
AI summary
A UE receives control signaling that indicates that the UE is scheduled to transmit one or more uplink control channel messages on a first component carrier that overlap in a time domain with one or more uplink shared channel messages scheduled for transmission on a second component carrier. The UE resolves a first overlap of uplink control channels having a same priority level, if present, and resolves, after resolving the first overlap, a second overlap of an uplink control channel and at least one uplink shared channel having the same priority level, if present. The UE resolves two or more channels having a different priority level after resolving the first overlap and the second overlap. The UE transmits one or more uplink transmissions including at least one of the one or more uplink control channel messages and the one or more uplink shared channel messages.