Description

This feature checks and retrieves Public ID information for a registration.

Session state inputs and outputs

Inputs

SentinelSelectionKey

A selection key with the platform operator, network operator, session type and plan-id set (such as OpenCloud:OpenCloud:eSRVCCRegistration:register:)

PreviousRegistrationData

A list of registration records including all preexisting, active registrations associated with the subscriber and call ID.

PublicIds

A list of public IDs that have already been extracted from encapsulated first-party registration data.

Outputs

PublicIds

The list of public IDs for the registration.

Feature responses

rejectRegisterRequest()

If the list of public IDs for the registration is empty once the feature has completed its analysis.

featureHasFinished()

Once the feature has finished

Statistics

DeterminePublicIdentities statistics are tracked by the DeterminePublicIdentities feature and can be found under the following parameter set:
SLEE-Usage ▶ sentinel.registrar service ID ▶ sentinel.registrar SBB ID ▶ DeterminePublicIdentities.

Name Type Description
Started

Counter

Incremented when the feature runs.

FailedToStart

Counter

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

IssuedWarning

Counter

Incremented when a non-fatal problem is encountered and the feature and 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 Registrar aborts execution.

RetrievedIdsFromPAssociatedUris

Counter

Incremented when a mapper has already successfully retrieved the public identities from encapsulated data.

RetrievedIdsFromPreviousRegistration

Counter

Incremented when the feature is able to retrieve public identities from previous registration data.

FailedToRetrieveIds

Counter

Incremented when no public identities can be determined.

Behaviour

This feature is responsible for ensuring that the public identities for the served user are present in session state. It is also responsible for refusing a REGISTER request when public identities cannot be determined.

Under normal circumstances the public identities are pulled into session state by extracting them from the P-Associated-URI header on the encapsulated first-party registration message within the third-party REGISTER request. This is done by a mapper prior to this feature running.

Initially this feature will check if the mapper was successful in extracting the public identities. If it was successful the feature will increment a statistic and complete execution with no further changes. If the mapper was unsuccessful, the feature will do one of the following:

  1. If the REGISTER request is for de-registration and third-party registration data is currently stored in a Cassandra database, then the feature will attempt to retrieve public identities from the most recent active registration for the served user. If this is successful the feature will populate session state with the retrieved identities and complete execution. If it is unsuccessful the feature will reject the REGISTER request.

  2. If the REGISTER request is for registration or re-registration, or third-party registration data is currently stored in the HSS; then the feature will immediately reject the REGISTER request.

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Sentinel Express Version 4.1