PUCCH HARQ-ACK Transmission Rules to Avoid 5G Slot Collisions
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently transmitting uplink control channels with multiple HARQ-ACKs in one slot, leading to potential collisions and undefined HARQ-ACK timing, which hinders low latency and high reliability in applications like eURLLC and eMBB.
Innovation Solution
A method for generating and transmitting multiple PUCCHs with different HARQ-ACK codebooks in a single slot, using indicators to determine which PUCCH to transmit, and defining HARQ-ACK timing in units smaller than a slot to avoid collisions and optimize transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCHs with different HARQ-ACK codebooks are transmitted in one slot, then the system can support multiple traffic types concurrently with reduced latency, but collision between PUCCH transmissions may occur
Solution Approach 1:
The patent segments the slot into multiple non-overlapping time resources for different PUCCH transmissions. By dividing the time domain into distinct segments, multiple HARQ-ACK codebooks can be transmitted simultaneously without collision, resolving the contradiction between transmission efficiency and reliability
Solution Approach 2:
The patent introduces a new dimension for resource allocation by defining HARQ-ACK timing in units smaller than a slot (e.g., mini-slots or sub-slots). This dimensional refinement allows multiple PUCCHs to coexist in the same slot by occupying different time sub-segments, enabling concurrent transmission of multiple traffic types while avoiding collisions
2Loss of time
If HARQ-ACK timing is defined in units smaller than a slot, then transmission latency is reduced and multiple PUCCHs can be accommodated, but the system complexity increases
Solution Approach 1:
The patent implements dynamic HARQ-ACK timing where the timing offset can be flexibly configured in sub-slot units based on traffic requirements. This dynamic approach allows the system to adaptively reduce latency for urgent traffic while maintaining manageable complexity through standardized procedures for timing determination
3Adaptability or versatility
If multiple PUCCHs are transmitted simultaneously in one slot, then support for eURLLC and eMBB traffic is improved, but the procedure for determining which PUCCH to transmit becomes undefined
Solution Approach 1:
The patent applies different transmission rules to different PUCCHs based on their local characteristics (e.g., traffic type, priority, timing offset). Each PUCCH is assigned specific transmission parameters and procedures tailored to its requirements, allowing simultaneous support for multiple traffic types while maintaining clear, unambiguous transmission procedures through localized rule application
Data Source
AI summary
The present specification relates to a device and method for transmitting an uplink control channel in a wireless communication system. Disclosed in the present specification is a method for transmitting a physical uplink control channel by means of a UE, the method including: a step for generating a first HARQ-ACK codebook related to a first PUCCH; a step for generating a second HARQ-ACK codebook related to a second PUCCH; and a step for transmitting simultaneously the first PUCCH and the second PUCCH or one PUCCH among the first PUCCH and the second PUCCH to a base station in one slot on the basis of a plurality of indicators. According to the present embodiments, the sequence for transmitting a plurality of PUCCHs including respectively different HARQ-ACKs in one slot is clarified, and thus the targeted performance of a 5G wireless communication system intended to simultaneously provide various types of traffic (eURLLC, eMBB) can be achieved.