4.4 Signalling based activation in LTE

28.4053GPPControl and configurationQuality of Experience (QoE) measurement collectionRelease 18Telecommunication managementTS

4.4.2 Activation of measurement collection for a UE in LTE

4.4.2.0 General

Activation of measurement collection for a UE can be done before UE attachment or after UE is attached.

4.4.2.1 Activation of QoE measurement task before UE attaches to the network

When HSS activates the QoE measurement collection for a job, to the MME the following configuration parameters shall be included in the message: serviceType, areaScope, qoECollectionEntityAddress, pLMNTarget, qoETarget, qoEReference and QMC configuration file.

At UE attachment the configuration parameters for the QoE measurement collection for a job is propagated to the UE.

The MME receives and stores QoE measurement collection job as part of Update Location Answer (or Insert Subscriber Information). Then the same procedure for activation of measurement collection job is applied as after UE is attached, described in see 4.4.2.2.

4.4.2.2 Activation of QoE measurement task after UE attachement to the network

The QoE measurement collection is sent to the UE from the OAM via CN. The messages from EMS propagated to HSS, MME and eNodeB are the same as previous section. QoE measurement collection activation request is propagated to UE finally.

When MME can send the QoE measurement collection to the UE through eNodeB, the following configuration parameters shall be included in the message: serviceType, areaScope, qoECollectionEntityAddress, pLMNTarget, qoETarget, qoEReference and QMC configuration file. QoE measurement collection activation request is propagated to UE.

1) The EMS sends activateAreaQMCJob to HSS that controls the impacted eNB(s), and includes the parameters: serviceType, areaScope, qoECollectionEntityAddress, pLMNTarget, qoETarget, qoEReference and QMC configuration file.

2) The HSS inserts subscriber related data and forwards it to the MME.

3) The MME forwards activateAreaQMCJob to impacted eNB(s), and includes the parameters: serviceType, areaScope, qoECollectionEntityAddress, pLMNTarget, qoETarget, qoEReference and QMC configuration file.

4) The eNB checks if the UE capability that matches the criteria for serviceType in the activateAreaQMCJob.

5) If the UE has the wanted UE capability, the eNB starts a UE request session and stores the associated QoECollectionEntityAddress, sends the message RRCConnectionReconfiguration to the UE, and includes the following: serviceType, qoEReference and QMC configuration file.

6) The access stratum in the UE sends the AT command +CAPPLEVMC to application level and includes the following: serviceType, qoEReference and QMC configuration file.

7) When the application in the serviceType starts, the QMC is initiated.

8) The application layer sends the AT command +CAPPLEVMR including a recording session indication that indicates that a session is started to the access stratum.

9) The UE sends the message MeasReportAppLayer including the recording session indication to the eNB.

10) The eNB sends a notification including the recording session indication to the NM.

11) When the QMC is completed, the recorded information is collected in a QMC report [6], [7], including qoEReference and recordingSessionId. The qoEReference, Client Id [6] and [7] in the reporting container (that represent the UE request session), and recordingSessionId are needed in the QMC collection entity for post processing purposes.

12) The application layer sends the AT command +CAPPLEVMR including qoEReference and the QMC report to the access stratum.

13) The UE sends the message MeasReportAppLayer including qoEReference and the QMC report to the eNB.

14) The eNB sends the QMC report to the MCE associated to the qoEReference.

4.4.3 Handling of measurement collection at handover in LTE

See clause 4.2.2.

4.4.4 Deactivation of measurement collection for a UE in LTE

4.4.4.1 Pre-set time has elapsed in LTE

When the pre-set time is elapsed, the MME and the eNB sets the network request session to ended, but do not delete the UE request session id and the Collection Entity Address parameters [3], due to that reports still can come from the UE that has to be transferred to the collection centre. The UE request session id and the Collection Entity Address parameters [3] are deleted when the session is ended.

4.4.4.2 Forced deactivation in LTE

When the operator technician or the management application wants to deactivate a measurement collection job, the management system sends the deactivateQMCJob operation [3] to the MME that propgates to the eNB . The eNB sets the network request session to ended, but does not delete the UE request session id and the Collection Entity Address parameters [3], as the UE still may send reports which shall be send to the collection centre. For UE request sessions which have reported that a recording session is started, the eNB sends the RRCConnectionReconfiguration message [8] to relevant UEs. The RRCConnectionReconfiguration message is including measConfigAppLayer set to discard application layer measurement report information in otherConfig [8]. The Access stratum sends +CAPPLEVMC AT command [5] to the application with the discard request. The application stops the recording session and stops recording of the requested information. The UE request session id and the Collection Entity Address parameters [3] in the eNB are deleted when the UE request session is ended.

4.4.4.3 Deactivation of recording session in LTE

See clause 4.2.3.2.