| Protocol | lte-rrc | Network | lte |
|---|---|---|---|
| Spec | 3GPP TS 36.331 | Spec Section | 5.6, 6.2.2 |
| Direction | UE -> eNodeB | Message Type | ProSe / Proximity Reporting |
| Full message name | LTE RRC Proximity Indication r9 |
|---|---|
| Protocol | LTE-RRC |
| Technology | LTE |
| Direction | UE -> eNodeB |
| Interface | Uu |
| Signaling bearer / channel | SRB1 / UL-DCCH |
| Typical trigger | Triggered when the UE needs to indicate a proximity-related state transition. |
| Main purpose | Lets the UE indicate proximity-related entry or exit so the network can apply or release later proximity-oriented configuration. |
| Main specification | 3GPP TS 36.331, 5.6, 6.2.2 |
| Release added | Release 9 |
| Procedures where used | Proximity reporting |
Uplink LTE RRC message used by the UE to report proximity-related status relevant to network-controlled proximity services handling.
Lets the UE indicate proximity-related entry or exit so the network can apply or release later proximity-oriented configuration.
Proximity Indication r9 is the LTE message the UE uses to tell the network that a proximity-related state changed.
Call flow position: UE report sent when the relevant proximity condition becomes active.
Typical state: The network can use the report to continue proximity-oriented handling.
Preconditions:
Next likely message: Later proximity-related configuration
Call flow position: UE update sent when the earlier proximity condition no longer applies.
Typical state: The report helps the network release or adjust the earlier proximity-related handling.
Preconditions:
Next likely message: Connected-mode continuation with updated proximity handling
Previous message(s): RRCConnectionReconfiguration
Next message(s): Later proximity-aware configuration handling
Security context: Sent after AS security activation as protected connected-mode signaling.
ProximityIndication-r9 ::= SEQUENCE {
criticalExtensions CHOICE {
c1 CHOICE {
proximityIndication-r9 ProximityIndication-r9-IEs,
spare3 NULL,
spare2 NULL,
spare1 NULL
},
criticalExtensionsFuture SEQUENCE {}
}
}
Read this message mainly through its procedure context and reported proximity state.
UL-DCCH-Message
message c1 : proximityIndication-r9 : {
criticalExtensions c1 : proximityIndication-r9 : {
proximityIndication-r9 enter
}
}
| IE | Required | Description |
|---|---|---|
proximityIndication-r9 | Yes | Indicates the UE's reported proximity-related state. |
proximityIndication-r9Indicates the UE's reported proximity-related state.
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 message may be missing, delayed, or not matched with the expected procedure context.
What to inspect: Check whether Proximity Indication r9 appears and what state it reports.
Next step: Compare it with later reconfiguration or continuation behavior.
It is the uplink LTE RRC message the UE uses to report a proximity-related state transition to the eNodeB.
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.