UCI Multiplexing Timeline for Mixed-Priority HARQ-ACK Collisions
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing uplink control information (UCI) between physical uplink control channels (PUCCH) carrying hybrid automatic repeat request-acknowledgement (HARQ-ACK) with different priorities, leading to collisions and inefficient data transmission due to limited flexibility and efficiency.
Innovation Solution
A user equipment (UE) and base station (gNB) processor determine UCI multiplexing on a single PUCCH when a low priority PUCCH collides with a high priority PUCCH, and establish a processing timeline for the multiplexing, allowing for the transmission and reception of UCI based on this timeline, thereby supporting joint HARQ-ACK reporting and multiplexing of codebooks with different priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PUCCH channels are used for high priority and low priority HARQ-ACK, then priority differentiation is achieved, but channel collision and resource waste occur when both need simultaneous transmission
Solution Approach 1:
The patent merges high priority and low priority HARQ-ACK transmissions into a single PUCCH channel by multiplexing both codebooks together. When a collision is detected between high and low priority PUCCH resources, the system combines the HARQ-ACK information from both priorities into one multiplexed transmission, eliminating the need for separate channels and resolving the collision while maintaining priority differentiation through appropriate multiplexing schemes.
2Productivity
If UCI multiplexing is implemented for HARQ-ACK with different priorities, then communication efficiency improves, but processing complexity and timeline constraints increase
Solution Approach 1:
The patent applies preliminary action by establishing predetermined processing timelines and collision detection mechanisms before actual HARQ-ACK transmissions occur. The system pre-defines the conditions under which multiplexing should be applied, the processing timelines required for different priority levels, and the collision detection rules, thereby reducing the complexity of real-time decision-making while maintaining efficient communication.
3Loss of time
If collision resolution between high and low priority PUCCH is implemented, then data delivery delay reduces, but processing timeline constraints become more stringent
Solution Approach 1:
The patent implements dynamic processing timelines that adapt based on the priority level and collision scenario. When high priority HARQ-ACK is detected, the system dynamically adjusts the processing timeline to ensure timely transmission, while low priority transmissions are flexibly scheduled around these constraints. This dynamic approach allows the system to minimize data delivery delays for critical high priority traffic while still accommodating low priority transmissions without overly stringent fixed timeline constraints.
Data Source
AI summary
A user equipment (UE) is described. The UE includes a processor configured to determine uplink control information (UCI) multiplexing on a single physical uplink control channel (PUCCH) when a low priority PUCCH carrying a hybrid automatic repeat request-acknowledgement (HARQ-ACK) collides with a high priority PUCCH carrying a HARQ-ACK. The processor is also configured to determine a processing timeline for the UCI multiplexing. The UE also includes transmitting circuitry configured to transmit the UCI multiplexing on the single PUCCH based on the processing timeline.