LTE RRC MeasReportAppLayer r15

Message Fact Sheet

Protocol	lte-rrc	Network	lte
Spec	3GPP TS 36.331	Spec Section	5.6, 6.2.2
Direction	UE -> eNodeB	Message Type	Application-Layer Measurement

Full message name	LTE RRC MeasReportAppLayer r15
Protocol	LTE-RRC
Technology	LTE
Direction	UE -> eNodeB
Interface	Uu
Signaling bearer / channel	SRB1 / UL-DCCH
Typical trigger	Triggered when configured application-layer measurement conditions produce a reportable result.
Main purpose	Carries app-layer measurement results so the eNodeB can evaluate service-aware measurement behavior and continue application-related optimization handling.
Main specification	3GPP TS 36.331, 5.6, 6.2.2
Release added	Release 15
Procedures where used	Application-layer measurement reporting

What is LTE RRC MeasReportAppLayer r15 in simple terms?

Uplink LTE RRC message used by the UE to report configured application-layer measurement results to the network.

Carries app-layer measurement results so the eNodeB can evaluate service-aware measurement behavior and continue application-related optimization handling.

Why this message matters

MeasReportAppLayer r15 is the LTE UE report for configured application-layer measurements.

Where this message appears in the call flow

Application-layer measurement reporting

LTE flow showing MeasReportAppLayer r15 after application-layer measurement configuration — The UE sends MeasReportAppLayer r15 after the configured application-layer measurement branch produces reportable results.

Call flow position: UE report sent after configured app-layer measurement conditions are met.

Typical state: The report gives the network service-aware measurement context rather than only radio-layer measurements.

Preconditions:

The UE received application-layer measurement configuration.
A reportable application-layer measurement result exists.

Next likely message: Later optimization or measurement continuation

Service-aware optimization branch

LTE flow showing MeasReportAppLayer r15 before later service-aware optimization handling — The report gives the network service-aware measurement input before the next optimization decision is made.

Call flow position: UE report used by the network before it decides whether any service-aware optimization action is needed.

Typical state: The message extends measurement handling into the application-layer domain.

Preconditions:

An app-layer measurement branch is active.

Next likely message: Connected-mode continuation or later reconfiguration

Call flow position

Previous message(s): RRCConnectionReconfiguration

Next message(s): Application-layer measurement continuation, Later optimization handling

Message direction and transport

Sender and receiver: UE -> eNodeB

Interface: Uu

Domain: Access-side radio control with application-layer measurement reporting

Signaling bearer: SRB1

Logical channel: UL-DCCH

Transport / encapsulation: Protected LTE RRC signaling in connected mode

Security context: Sent as protected connected-mode signaling.

Message Structure Overview

MeasReportAppLayer-r15 is an uplink measurement report whose payload is application-layer oriented.

ASN.1 for LTE RRC MeasReportAppLayer r15

MeasReportAppLayer-r15 ::= SEQUENCE {
  criticalExtensions CHOICE {
    c1 CHOICE {
      measReportAppLayer-r15 MeasReportAppLayer-r15-IEs,
      spare3 NULL,
      spare2 NULL,
      spare1 NULL
    },
    criticalExtensionsFuture SEQUENCE {}
  }
}

How to read this ASN.1

Read it as the app-layer counterpart of a normal radio measurement report.

LTE RRC MeasReportAppLayer r15 - Example Dump

UL-DCCH-Message
  message c1 : measReportAppLayer-r15 : {
    criticalExtensions c1 : measReportAppLayer-r15 : {
      measResultAppLayer-r15 present
    }
  }

How to read this dump

The main value is the app-layer measurement result and what network action followed.

Important Information Elements

IE	Required	Description
`measResultAppLayer-r15`	Yes	Carries the application-layer measurement results reported by the UE.

Detailed field explanation

`measResultAppLayer-r15`

Carries the application-layer measurement results reported by the UE.

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.

What to check in logs and traces

Check the earlier app-layer measurement configuration.
Correlate the report with any later optimization decision.
Do not confuse this message with ordinary radio measurement reporting.

Common Issues and Troubleshooting

Service-aware measurement behavior looks incomplete or missing.

Likely cause: The UE may not have produced the expected app-layer report, or the network may not have acted on it.

What to inspect: Check whether MeasReportAppLayer r15 appears and what later branch follows.

Next step: Compare it with the earlier app-layer configuration and any later reconfiguration.

FAQ

What is MeasReportAppLayer r15 in LTE?

It is the uplink LTE RRC message the UE uses to report configured application-layer measurement results.

Related message pages

Related Procedures

Related Tools

Use This Reference in Practice

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.