5G NR

Table 4.31

Random-access configurations for TDD mode in FR1 [6].

PRACH Configuration Index	Preamble Format	${\mathit{n}}_{\mathit{S}\mathit{F}\mathit{N}}\mathbf{mod}\mathit{x}\mathit{=}\mathit{y}$		Subframe Number	Starting Symbol	Number of PRACH Slots Within a Subframe	${\mathit{N}}_{\mathit{t}}^{\mathit{P}\mathit{R}\mathit{A}\mathit{C}\mathit{H}\mathit{,}\mathit{s}\mathit{l}\mathit{o}\mathit{t}}$ Number of Time-Domain PRACH Occasions Within a RACH Slot	${\mathit{N}}_{\mathit{d}\mathit{u}\mathit{r}\mathit{a}\mathit{t}\mathit{i}\mathit{o}\mathit{n}}^{\mathit{R}\mathit{A}}$ PRACH Duration
		$\mathit{x}$	$\mathit{y}$
0	0	16	1	9	0	–	–	0
1	0	8	1	9	0	–	–	0
2	0	4	1	9	0	–	–	0