PDCCH CCE Indexing

38.211 : A control-channel element (CCE) consists of 6 resource-element groups (REGs)

Search Space

PDCCH Type

Common Search Space UE Search Space

Coreset Id (p)

0 1 2 3 4 5 6 7 8 9 10 11

Periodicity (slot)

sl1 sl2 sl4 sl5 sl8 sl10 sl16 sl20 sl40

Periodicity offset

0

COntrol-REsource SET (CORESET)

Configuration

PBCH Dedicated

PBCH RBs

24 PRBs 48 PRBs 96 PRBs

Time duration

1 symbol 2 symbols 3 symbols

Freq domain (PRBs)

6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126 132 138 144 150 156 162 168 174 180 186 192 198 204 210 216 222 228 234 240 246 252 258 264 270

Carrier configuration

μ (RMSI)

0 (15 KHz) 1 (30 KHz) 2 (60 KHz) 3 (120 KHz)

Slot (n^μ_s,f)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

RNTI (Dec) nCi

0 1 2 3 4 5 6 7

38.321 : C-RNTI ∈ [ 0x1-0xFFEF / 1-65519 ] ; P-RNTI ∈ [ 0xFFFE / 65534 ] ; SI-RNTI ∈ [ 0xFFFF / 65535 ]

PDCCH candidates

AL1

0 1 2 3 4 5 6 8

AL8

0 1 2 3 4 5 6 8

AL2

0 1 2 3 4 5 6 8

AL16

0 1 2 3 4 5 6 8

AL4

0 1 2 3 4 5 6 8

38.213 §10 : UE procedure for receiving control information
For a search space set s associated with CORESET p, the CCE indexes for aggregation level L corresponding to PDCCH candidate m_s,nCI of the search space set in slot n^μ_s,f for an active DL BWP of a serving cell corresponding to carrier indicator field value n_CI are given by :