Uplink HARQ-ACK Timing for Priority-Based 5G Control Signaling

The control signaling is segmented into different priority levels (first priority and second priority). High-priority control signaling carries critical HARQ-ACK feedback with variable delays, while low-priority control signaling handles less time-sensitive data. This segmentation allows the system to implement flexible scheduling for urgent feedback without overwhelming the control channel with complex signaling for all traffic.

The system dynamically changes the timing parameter (feedback delay) based on priority. First priority control signaling uses a first timing value (shorter delay) while second priority control signaling uses a second timing value (longer delay). This parameter change enables adaptable scheduling responses without requiring complex control mechanisms for every transmission.

The system performs preliminary action by determining the priority level of control signaling before transmission. The terminal device identifies whether the control signaling is first priority or second priority, selects the corresponding timing value in advance, and prepares the appropriate uplink resource. This preliminary classification simplifies the coordination process during actual transmission.

The system implements dynamic timing selection where the uplink transmission timing is not fixed but adapts based on the priority of the control signaling. First priority signaling dynamically selects a shorter timing value while second priority signaling selects a longer timing value, allowing the system to differentiate services while maintaining manageable coordination through clear priority-based rules.

The system applies local quality by assigning different timing characteristics to different priority levels of control signaling. First priority control signaling (urgent feedback) uses a first timing value with shorter delay, while second priority control signaling (less urgent) uses a second timing value with longer delay. This ensures that critical feedback receives timely response while non-critical traffic efficiently utilizes available resources.

The system applies partial action by extending the feedback timing only for second priority control signaling where the longer delay is acceptable. First priority signaling maintains shorter timing to ensure timely feedback. This partial extension of timing for specific cases improves overall resource utilization without unnecessarily delaying critical feedback.