Network-Assisted Full-Duplex Enabled Ultrareliable and Low-Latency Communications

Table 2

User plane latency in TTIs for downlink in TDD/FDD/NAFD systems.

Latency composition	TDD latency	FDD latency	NAFD latency
BS processing	1.5TTI	2TTI	1.5TTI
UL-DL link-switching delay	1TTI	0TTI	0TTI
DL total queuing
DL frame alignment	1TTI	1TTI	1TTI
DL packet transmission	1TTI	1TTI	1TTI
DL hybrid automatic repeat request (HARQ) retransmission	TDD	FDD	NAFD
UE processing delay	1.5TTI	1.5TTI	1.5TTI
Pilot sending for channel estimation delay	0TTI	3TTI	0TTI
Total delay