This feature removes entries in the external session tracking database at the end of a session.

Feature cheat sheet

B2BUA Instance Originating / Terminating Point(s) in Session Plan Network Operator Data Subscriber Data Stateful or Stateless POJO or SBB Feature Other notes

SCC

Both Originating and Terminating

SIP End Session

None

None

Stateless

POJO

Prerequisite features

Session input and output variables

Session input variables

Session State variable name Type Comments
ExternalSessionTrackingActive

Boolean

Set by the SCCDetermineExternalSessionTracking feature

TrackedSessionDialogID

String

Set by the TrackSessionRefresh

Session output variables

None.

Statistics

DeleteTrackedSession statistics are tracked by the volte.sentinel.sip SBB and can be found under the following parameter set in REM:
SLEE-Usage → volte.sentinel.sip service → volte.sentinel.sip SBB → feature → DeleteTrackedSession
or with rhino-stats:
"SLEE-Usage.Services.ServiceID[name=volte.sentinel.sip,vendor=OpenCloud,version=2.7.0].SbbID[name=volte.sentinel.sip,vendor=OpenCloud,version=2.7.0].feature.DeleteTrackedSession"

Name Description
Started

Incremented each time the feature runs

FailedToStart

Incremented when a fatal error occurs before feature execution

IssuedWarning

Incremented when a non-fatal error occurs during feature execution

FailedDuringExecution

Incremented when a fatal error occurs during feature execution

TimedOut

Incremented when feature execution does not complete within a reasonable time frame

TrackedDialogDeleteStarted

Incremented when the feature starts a TrackedDialog Cassandra delete

TrackedDialogDeleteSuccess

Incremented when a TrackedDialog delete returns successfully from Cassandra

TrackedDialogDeleteError

Incremented when a TrackedDialog delete fails with a Cassandra error

TrackedDialogDeleteTimeout

Incremented when a TrackedDialog delete fails with a timeout

CassandraAsyncQueryTimeSuccess

Samples the elapsed time between starting a query and a success response arriving from Cassandra

CassandraAsyncQueryTimeFailure

Samples the elapsed time between starting a query and a failure response arriving from Cassandra

Behaviour

The DeleteTrackedSession feature runs at the SipEndSession execution point, and removes any tracked session database entries for the access leg.

The feature looks up the access leg’s trackeddialog entry using the dialog ID from the TrackedSessionDialogID session state variable. If found, the trackeddialog and all related trackeddialogkeys entries are removed.

The feature only runs when the session state variable ExternalSessionTrackingActive is true, as determined by the SCCDetermineExternalSessionTracking feature.

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Sentinel VoLTE Version 2.7.0