This feature reads Third Party Registration information stored in the Cassandra Database, and writes it into session state. Information is read during InitialDP processing. It reads the Third Party Registration information via the Cassandra CQL RA. For more information refer to Cassandra storage.

Note

From Sentinel 3.1.0 if several registration records are present for the IMPU the feature will select the valid (newest) registration per UE based on private identity, +sip.instance, and the creation time of the record. Prior to 3.1.0 it was not guaranteed that the correct registration would be used.

Feature cheat sheet

B2BUA Instance Originating / Terminating Point in Session Plan Network Operator Data Subscriber Data Stateful or Stateless POJO Feature or SBB Feature

SCC

Terminating

DirectAccessNetworkCheck

No

No

Stateless

SBB

Prerequisite features

These features must run before IMSIDLookupFromCassandraIN:

Session input and output variables

Session input variables

Session State variable name Variable type

Subscriber

String

Note This is the IMS Public Identity for the Served User, and is extracted from the InitialDP.

Session output variables

Session State variable name Variable type Comments
IsLoggedIn

boolean

True, if the feature was able to find a valid registration record for the subscriber.

Statistics

IMSIDLookupFromCassandraIN statistics are tracked by the IMSIDLookupFromCassandraIN feature and can be found under the following parameter sets:

SLEE-Usage ▶ sentinel.volte.ss7 service ID ▶ sentinel.volte.ss7 SBB ID ▶ IMSIDLookupFromCassandraIN feature.

Name Type Description
Started

Counter

Incremented when the feature runs.

FailedToStart

Counter

Incremented when Sentinel VoLTE encounters an error while attempting to start the feature.

IssuedWarning

Counter

Incremented when a non-fatal problem is encountered and the feature issues a warning.

FailedDuringExecution

Counter

Incremented when a fatal problem is encountered and the feature cannot execute correctly.

TimedOut

Counter

Incremented when the feature takes too long to complete and Sentinel VoLTE aborts execution.

SLEE-Usage ▶ sentinel.volte.ss7 service ID ▶ volte.sentinel.volte-imsid-lookup-cassandra-ss7-feature SBB ID.

Name Type Description
Started

Counter

Incremented when the feature runs.

FailedToStart

Counter

Incremented when Sentinel VoLTE encounters an error while attempting to start the feature.

IssuedWarning

Counter

Incremented when a non-fatal problem is encountered and the feature issues a warning.

FailedDuringExecution

Counter

Incremented when a fatal problem is encountered and the feature cannot execute correctly.

FeatureError

Counter

Incremented when a feature error occurs.

TimedOut

Counter

Incremented when the feature takes too long to complete and Sentinel VoLTE aborts execution.

CassandraQueried

Counter

Incremented when Cassandra is queried for a subscriber’s registration.

NoSubscriberSpecified

Counter

Incremented when no subscriber is specified for the query.

SubscriberNotRegistered

Counter

Incremented when the returned subscriber from Cassandra is not registered.

IMSIDRetrieveFail

Counter

Incremented when the Cassandra lookup fails.

IMSIDRetrieveSuccess

Counter

Incremented when the Cassandra lookup succeeds.

ImsUserStateSourceNotApplicable

Counter

Incremented when Sentinel VoLTE is configured to determine the IMS user state from the HSS

ResponseLatency

Sampled

Records elapsed time between querying the Cassandra database and getting a response (in milliseconds).

Behaviour

The feature queries the Cassandra Database using a Primary Key of the IMS Public Identity of the Served User. If a valid registration for the subscriber is found, the IsLoggedIn session state field will be set to true. Otherwise it will be set to false.

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Sentinel VoLTE Version 4.0.0