Uplink Control Information Transmission Overlap Handling
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Solution Overview
Problem
In the 5G new radio (NR) system, there is no specific solution for handling the transmission of a scheduling request (SR) and a physical uplink shared channel (PUSCH) when they overlap in the time domain, leading to resource wastage and inefficiencies, particularly due to the higher priority of ultra-reliability and low latency communication (URLLC) over enhanced mobile broadband (eMBB).
Innovation Solution
A method and device that determine when a physical uplink control channel (PUCCH) carrying uplink control information overlaps with a PUSCH in the time domain, allowing for the dropping or delaying of the UCI transmission to prevent resource wastage, by defining target time nodes such as transmission start instants or durations before/after the PUSCH start, enabling normal transmission of the PUSCH and efficient resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal transmits both SR and PUSCH when they overlap in time domain, then the SR transmission is ensured, but the PUSCH transmission is interrupted causing resource wastage
Solution Approach 1:
The terminal determines whether PUCCH carrying SR overlaps with PUSCH before the PUSCH transmission start time node, and in advance drops or delays the SR transmission. This preliminary action prevents the PUSCH from being interrupted, avoiding resource wastage while ensuring SR is transmitted in the next available occasion
Solution Approach 2:
The terminal dynamically adjusts the SR transmission timing based on the overlap detection result. When overlap is detected before PUSCH start, SR is delayed to next transmission occasion; when no overlap or after PUSCH start, SR is transmitted normally. This dynamic adjustment optimizes resource utilization
2Reliability
If the terminal drops PUSCH to transmit SR when they overlap, then the SR is transmitted successfully, but the PUSCH transmission is lost causing data loss
Solution Approach 1:
The terminal performs overlap determination before the PUSCH transmission start time node and in advance decides to drop or delay SR. This preliminary decision prevents PUSCH data loss by ensuring PUSCH transmission is not interrupted, while SR is transmitted in the next available transmission occasion
3Productivity
If the terminal delays SR transmission to next occasion, then the PUSCH transmission is ensured, but the SR transmission delay increases
Solution Approach 1:
The terminal determines overlap before PUSCH transmission start and in advance delays SR to next transmission occasion. This preliminary delay action ensures PUSCH transmission efficiency by avoiding interruption, while SR is transmitted in the next available occasion with minimal necessary delay
Data Source
AI summary
Disclosed are a transmission method and device, for use in solving the problem in the prior art that no specific solution is available for dealing with how to transmit an SR and a PUSCH when the SR overlaps with the PUSCH in a time domain. If it is determined that a PUCCH bearing first type of DCI overlaps with the PUSCH in the time domain after a target node of the PUSCH, it is possible to select to discard the first type of DCI or delay the first type of DCI to the next transmission opportunity for transmitting.