SIB20 (SIB20-r17)
SIB20-r17 is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.
Definition
SIB20 contains the information required to acquire the MCCH/MTCH configuration for MBS broadcast.
SIB20-r17 ::= SEQUENCE {
mcch-Config-r17 MCCH-Config-r17,
cfr-ConfigMCCH-MTCH-r17 CFR-ConfigMCCH-MTCH-r17 OPTIONAL, -- Need S
lateNonCriticalExtension OCTET STRING OPTIONAL,
...,
[[
cfr-ConfigMCCH-MTCH-RedCap-r18 CFR-ConfigMCCH-MTCH-r17 OPTIONAL, -- Need S
mcch-ConfigRedCap-r18 MCCH-Config-r17 OPTIONAL -- Need S
]]
}Candidate change requests of v18.2.0
The CRs whose title or cover names this change, strong and likely matches only.
- CR 4816 r2 (strong): Correction on the configuration of Redcap CFR [RedCapMBS_Bcast]
Fields (5)
| Field | Description |
|---|---|
| mcch-Config-r17 MCCH-Config-r17 | |
| cfr-ConfigMCCH-MTCH-r17 CFR-ConfigMCCH-MTCH-r17 · OPTIONAL Need S | Common frequency resource used for MCCH and MTCH reception. If the field is absent, the CFR for broadcast has the same location and size as CORESET#0 and PDSCH configuration of MCCH is the same as PDSCH configuration provided in initialDownlinkBWP in SIB1 . |
| lateNonCriticalExtension OCTET STRING · OPTIONAL | |
| cfr-ConfigMCCH-MTCH-RedCap-r18 CFR-ConfigMCCH-MTCH-r17 · OPTIONAL Need S since v18.0.0 | Common frequency resource used for MCCH and MTCH reception for (e)RedCap UEs. If the field is absent, the (e)RedCap UE can use cfr-ConfigMCCH-MTCH if the UE supports the configured bandwidth. |
| mcch-ConfigRedCap-r18 MCCH-Config-r17 · OPTIONAL Need S since v18.0.0 |