SubscriberDataLookupFromHLR is responsible for reading subscriber data from the HLR and writing it into Sentinel session state variable fields.

The data it reads from the HLR is accessed through the AnyTimeSubscriberInterrogation MAP operation. The Application Context used is anyTimeInfoHandlingContext_v3_ac

Feature cheat sheet

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

Both or either of MMTEL or SCC.

No

Originating, Forwarding, and Terminating

SipAccess_SubscriberPreCreditCheck

Yes

Yes

Stateless

POJO

Prerequisite features

Configuration

The feature uses the HLRConfigProfileTable to access its configuration. For more information refer to HLR MAP Configuration.

Statistics

SubscriberDataLookupFromHLR statistics are tracked by the SubscriberDataLookupFromHLR feature and can be found under the following parameter set: SLEE-Usage → sentinel.volte.sip service ID → SubscriberDataLookupFromHLR.

Name Type Description 
Started

Counter

Incremented each time 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

 
RequestSent

Counter

Incremented when the feature receives subscriber data from the HLR

 
RequestSuccessful

Counter

Incremented after the feature successfully processes the data it received, and loads it into session state fields

 
RequestFailed

Counter

Incremented when absent configuration data prevents the feature from running

 
ResponseLatency

Sampled

Records elapsed time between sending the request to the HLR and getting a response (in milliseconds).

Behaviour

This feature uses the CGIN MAP RA to access the HLR.

Each time the feature is invoked, it checks the call type and determines the subscriber number that it should use to query the HLR.

The feature attempts to extract "phone number digits" from the Default Public ID, and if it cannot, from any other registered IMS Public User Identity. The first IMS Public User Identity that has "phone number digits" has its digits extracted to form the MSISDN for the AnytimeSubscriptionInterrogation query. If the feature cannot form an MSISDN it raises a Feature Error and finishes execution.

The feature requests the subscriber data by sending a AnyTimeSubscriptionInterrogation request for all Supplementary Services. If the triggering attempt is a terminating trigger, the feature sends two queries in order to gather the Call Forwarding information.

In order to form the ATSI request the feature:

  1. sets the GSM SCF address to the SentinelSCCPAddress configuration value

  2. sets the destination SCCP address to the HlrSCCPAddress configuration value

  3. sets the indicator fields to request CLIP, CLIR, CW, ODB and may request Forwarding information for unconditional forwarding

If the session is a terminating session, a second request is sent where Forwarding information is requested for conditional forwarding.

Once the query(s) are successful, it sets the session state fields for the supplementary services according the mapping below.

Supplementary Service Session State Mappings

GSM Service MMTel Service

CLIP

OIP

COLP

TIP

CLIR

OIR

COLR

TIR

ODB

ICB

ODB

OCB

Call Forwarding

CDIV

Call Waiting

CW

Call Hold

HOLD

GSM ASN.1 Schema to Session-State Fields

The mapping below describes how the AnyTimeSubscriptionInterrogation result is mapped into the MMTel Subscriber Data Representation.

ss-Status ASN.1 field

The field ss-Status is used by almost all supplementary services and defines the service state. Each service defines a set of possible values based on ss-Status, so called State Vectors. A state vector is formed of 4 variables: Provisioning State, Registration State, Activation State and HLR Induction State. This feature only reads the Activation State, i.e. "A and Q" bits.

For more information see 3GPP TS 23.011 - Technical realization of Supplementary Services.

CLIP

ASN.1 Field (From) Session-State Field (To) Mapping Rules

ClipData.ss-Status

MMTelOIPServiceData.active

true if ss-Status=Active and Operative else false.

OverrideCategory

MTelOIPServiceData.override

No default value. It is an obligatory field from HLR response.

CLIR

ASN.1 Field (From) Session-State Field (To) Mapping Rules

ClirData.ss-Status

MMTelOIRServiceData.active

true if ss-Status=Active and Operative else false.

n/a

MMTelOIRServiceData.mode

the same default for IMS OIR

ClirData.CliRestrictionOption

MMTelOIRServiceData.defaultBehaviourType

No default value. It is an obligatory field from HLR response.

COLP

ASN.1 Field (From) Session-State Field (To) Mapping Rules

n/a

MMTelTIPServiceData.active

true.

n/a

MMTelTIPServiceData.override

the same default for IMS TIP

COLR

ASN.1 Field (From) Session-State Field (To) Mapping Rules

n/a

MMTelTIRServiceData.active

true.

n/a

MMTelTIRServiceData.mode

the same default for IMS TIR

ODB - Incoming calls

ASN.1 Field (From) Session-State Field (To) Mapping Rules

n/a

MMTelICBServiceData.active

true.

ODB-Info.ODB-Data.ODB-GeneralData

MMTelICBServiceData.ruleset

see Ruleset Conditions for barring incoming calls

Ruleset Conditions for barring incoming calls

ODB Data Value Condition

allIC-CallsBarred

Unconditional

n/a

Anonymous

roamingOutsidePLMNIC-CallsBarred

Roaming

roamingOutsidePLMNICountryIC-CallsBarred

Roaming and International ExHC

ODB - Outgoing calls

ASN.1 Field (From) Session-State Field (To) Mapping Rules

n/a

MMTelOCBServiceData.active

true

ODB-Info.ODB-Data.ODB-GeneralData

MMTelOCBServiceData.ruleset

see Ruleset Conditions for barring outgoing calls

Ruleset Conditions for barring outgoing calls

ODB Data Value Condition

allOG-CallsBarred

Unconditional

internationalOGCallsBarred

International

internationalOGCallsNotToHPLMN-CountryBarred

International-exHC

roamingOutsidePLMNOG-CallsBarred

Roaming

Call Forwarding

ASN.1 Field (From) Session-State Field (To) Mapping Rules

callForwardingData.forwardingFeatureList[x].ss-Status

MMTelCDIVServiceData.active

true if ss-Status=Active and Operative else false.

callForwardingData.forwardingFeatureList.forwardingOptions

MMTelCDIVServiceData.ruleset

No default value defined.

callForwardingData.forwardingFeatureList.noReplyConditionTime

MMTelCDIVServiceData.noreplytimeout

No default value defined.

Ruleset Conditions for Call Forwarding

ASN.1 value in bits 4 and 3 of Octet 1 of Ext-ForwardOptions Condition 00

Not Reachable

01

Busy

10

No reply

11

Call Waiting

ASN.1 Field (From) Session-State Field (To) Mapping Rules

CallWaitingData.ss-Status

MMTelCWServiceData

true if ss-Status=Active and Operative else false.

Call Hold

ASN.1 Field (From) Session-State Field (To) Mapping Rules

CallHoldData.ss-Status

MMTelHOLDServiceData.active

true if ss-Status=Active and Operative else false.
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Sentinel VoLTE Version 4.1