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

Table 1

CP latency in TTIs in TDD/FDD/NAFD systems.

Latency composition	TDD latency	FDD latency	NAFD latency
Worst-case delay due to random access channel (RACH) scheduling period	2TTI	1TTI	2TTI
Transmission of RACH preamble	1TTI	1TTI	1TTI
Preamble detection and processing in BS	1TTI	1TTI	1TTI
DL slot alignment	1TTI	0TTI	0TTI
Transmission of random access (RA) response	1TTI	1TTI	1TTI
UE processing delay	1TTI	1TTI	1TTI
UL slot alignment	1TTI	0TTI	0TTI
Transmission of RRC connection resume request	1TTI	1TTI	1TTI
Processing delay in BS	3 ms	3 ms	3 ms
DL slot alignment	1TTI	0TTI	0TTI
Transmission of RRC connection resume	1TTI	1TTI	1TTI
Processing delay in the UE	3 ms	3 ms	3 ms
UL slot alignment	1TTI	0TTI	0TTI
Transmission of RRC connection resume complete	1TTI	1TTI	1TTI
Processing delay in BS	1TTI	1TTI	1TTI
Total delay	14TTI + 6 ms	9TTI + 6 ms	10TTI + 6 ms