PUCCH Uplink Control Multiplexing for Overlapping SR and HARQ-ACK
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Solution Overview
Problem
In wireless communication, when a physical uplink control channel (PUCCH) of a scheduling request (SR) and a PUCCH of hybrid automatic repeat request acknowledgement (HARQ-ACK) information overlap in the time domain, the scheduling request is often discarded or delayed, particularly for high-priority services like ultra reliable low latency communications (URLLC), leading to delayed data transmission and poor reliability.
Innovation Solution
A transmission method is implemented to determine a transmission mechanism for overlapping SR and HARQ-ACK information, ensuring the SR is not discarded or delayed by using specific sequence index initial values and index offsets to transmit the SR and HARQ-ACK information in appropriate PUCCH formats, allowing simultaneous transmission of both.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the PUCCH of SR and PUCCH of HARQ-ACK information overlap in time domain, then the scheduling request is discarded or delayed, but the reliability of high-priority services deteriorates
Solution Approach 1:
The patent segments the PUCCH transmission by separating SR and HARQ-ACK information into different time resources. When overlap is detected, the SR is transmitted in an earlier PUCCH opportunity while HARQ-ACK is transmitted later, preventing discard and ensuring reliable transmission of high-priority scheduling requests.
Solution Approach 2:
The patent applies preliminary action by determining and transmitting the SR before the HARQ-ACK transmission opportunity. The system proactively schedules the SR transmission in advance when overlap is anticipated, ensuring that high-priority scheduling requests are not delayed by subsequent HARQ-ACK transmissions.
2Device complexity
If the scheduling request is discarded or delayed to resolve time domain overlap, then the PUCCH resource conflict is resolved, but the data transmission delay increases
Solution Approach 1:
The patent implements dynamic PUCCH resource allocation where the transmission timing of SR and HARQ-ACK is adjusted based on actual overlap conditions. The system dynamically determines transmission opportunities to minimize delay while resolving conflicts, rather than using fixed discard policies.
Solution Approach 2:
The patent changes the time parameter of PUCCH transmission by adjusting the transmission timing of SR and HARQ-ACK based on overlap detection. When overlap is detected, the system modifies transmission time slots to separate the two channels, thereby resolving conflicts without causing unnecessary delays.
3Ease of manufacture
If a fixed transmission mechanism is used for overlapping PUCCH, then the implementation is simple, but the adaptability to different service priorities is reduced
Solution Approach 1:
The patent applies local quality by differentiating transmission treatment based on service priority. High-priority SR transmissions receive preferential handling with dedicated time resources, while lower-priority transmissions may be merged or delayed. This localized differentiation maintains implementation simplicity while providing adaptability to service priorities.
Data Source
AI summary
A transmission method includes: multiplexing first uplink control information (UCI) and second UCI into one designated physical uplink control channel (PUCCH), where a PUCCH of the first UCI with a high-priority and a PUCCH of the second UCI with a low-priority overlap in a time domain; and transmitting the second UCI with the low-priority, multiplexed into the one designated PUCCH, by using a power based on a power control parameter associated with the first UCI with the high-priority.