LCID values for DL-SCH
| Index | LCID Values |
|---|---|
| 0 | SCCH carrying PC5-S messages that are not protected |
| 1 | SCCH carrying PC5-S messages “Direct Security Mode Command” and “Direct Security Mode Complete”, “ProSe direct link security mode command” and “ProSe direct link security mode complete” |
| 2 | SCCH carrying other PC5-S messages that are protected |
| 3 | SCCH carrying PC5-RRC messages |
| 4–19 | Identity of the logical channel |
| 20–55 | Reserved |
| 56 | SCCH carrying RRC messages delivered via SL-RLC0 as specified in TS 38.331 [5] |
| 57 | SCCH carrying RRC message delivered via SL-RLC1 as specified in TS 38.331 [5] |
| 58 | SCCH for Sidelink Discovery Messages |
| 59 | Sidelink Inter-UE Coordination Request |
| 60 | Sidelink Inter-UE Coordination Information |
| 61 | Sidelink DRX Command |
| 62 | Sidelink CSI Reporting |
| 63 | Padding |
Reference :
- 3GPP TS 38.321 NR; Medium Access Control (MAC) protocol specification