PUCCH Transmission Coordination 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, leading to poor reliability, particularly for high-priority services like ultra reliable low latency communications (URLLC), resulting in delayed data transmission.
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 through appropriate PUCCH resources, 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 resource utilization is improved, but the SR is discarded or delayed resulting in poor reliability
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 collision and ensuring reliable SR delivery for high-priority services.
Solution Approach 2:
The patent applies preliminary action by transmitting the SR before the HARQ-ACK when time overlap is anticipated. The system determines transmission timing in advance based on priority levels, ensuring that high-priority SR requests are sent before lower-priority HARQ-ACK information, thus preventing SR discarding.
2Object-affected harmful factors
If the SR is discarded or delayed to resolve overlap, then collision avoidance is achieved, but data transmission and response are delayed for important services
Solution Approach 1:
The patent implements dynamic transmission timing adjustment based on service priority. High-priority SR requests (such as URLLC services) are transmitted immediately when resources are available, while lower-priority HARQ-ACK information is scheduled later. This dynamic adaptation prevents time loss for critical services while avoiding collisions.
Solution Approach 2:
The system changes the transmission time parameter of SR based on priority levels. When SR corresponds to high-priority services, the transmission time is set to the earliest available PUCCH opportunity. When overlap with HARQ-ACK is detected, the timing parameters are adjusted to transmit SR first, then HARQ-ACK, eliminating delay for important services.
3Speed
If high-priority SR is transmitted simultaneously with HARQ-ACK, then transmission speed is improved, but collision occurs resulting in poor reliability
Solution Approach 1:
The patent segments the simultaneous transmission into separate time slots. Even though both SR and HARQ-ACK are transmitted quickly, they are sent in sequence rather than simultaneously, eliminating signal collision while maintaining high transmission speed for both types of information.
Data Source
AI summary
Provided are a transmission method, a transmission apparatus, a communication node and a medium. The transmission method includes: in a case where a physical uplink control channel (PUCCH) of a target scheduling request (SR) and a PUCCH of hybrid automatic repeat request-acknowledgment (HARQ-ACK) information overlap in a time domain, determining a transmission mechanism for the target SR and the HARQ-ACK information; and performing a transmission operation according to the transmission mechanism.