| Protocol | lte-rrc | Network | lte |
|---|---|---|---|
| Spec | 3GPP TS 36.331 | Spec Section | 5.2.2, 6.2.2 |
| Direction | Broadcast | Message Type | Broadcast System Information |
| Full message name | LTE RRC MIB MBMS r14 |
|---|---|
| Protocol | LTE-RRC |
| Technology | LTE |
| Direction | Broadcast |
| Interface | Uu |
| Signaling bearer / channel | Broadcast / PBCH / MBMS broadcast context |
| Typical trigger | Read by the UE during MBMS-specific broadcast acquisition. |
| Main purpose | Provides the initial MBMS-specific broadcast information the UE needs before reading later MBMS system information. |
| Main specification | 3GPP TS 36.331, 5.2.2, 6.2.2 |
| Release added | Release 14 |
| Procedures where used | MBMS broadcast acquisition |
Broadcast LTE RRC message carrying the MBMS-specific master information block for MBMS-oriented operation.
Provides the initial MBMS-specific broadcast information the UE needs before reading later MBMS system information.
MIB MBMS r14 is the first MBMS-specific broadcast block the UE reads before later MBMS system information.
Call flow position: Initial MBMS-specific broadcast block read by the UE.
Typical state: The UE is gathering MBMS-specific broadcast information before later MBMS system information.
Preconditions:
Next likely message: System Information MBMS r14
Call flow position: Early broadcast read step used before the UE can interpret later MBMS-specific SI.
Typical state: The message anchors the MBMS-specific broadcast branch.
Preconditions:
Next likely message: System Information Block Type 1 MBMS r14
Next message(s): SystemInformation-MBMS-r14, SystemInformationBlockType1-MBMS-r14
Security context: Broadcast information
MasterInformationBlock-MBMS-r14 ::= SEQUENCE {
...
}
Read it as the MBMS-specific equivalent of the earliest broadcast anchor.
PBCH
MasterInformationBlock-MBMS-r14: present
| IE | Required | Description |
|---|---|---|
MasterInformationBlock-MBMS-r14 | Yes | Carries the MBMS-specific master information block content. |
MasterInformationBlock-MBMS-r14Carries the MBMS-specific master information block content.
Presence: Required
In practice: In practice, compare this field with the original request and with any later release-dependent optional fields so you can see whether the network accepted the same service model the UE asked for.
Likely cause: The earlier MBMS master information acquisition may be missing or inconsistent.
What to inspect: Check whether Master Information Block MBMS r14 was available and what later MBMS SI followed.
Next step: Treat it as MBMS broadcast acquisition troubleshooting.
It is the MBMS-specific LTE broadcast master information block used before later MBMS system information.
Decode this message with the 3GPP Decoder, inspect the related message database, or open the matching call flow to see where this signaling step fits in the full procedure.