What is ODB?

Operator determined barring is specified for IMS in the 3GPP specifications TS 24.315 and TS 22.041:

from TS 24.315

The network feature Operator Determined Barring (ODB) allows a network operator or service provider to regulate access to IMS subsystem services, by the barring of certain categories of incoming or outgoing communications, the barring of certain categories of roaming and the barring of certain categories of supplementary services configuration and invocation.

The Sentinel VoLTE TAS provides an extension to standard ODB that allows the operator to retarget outbound calls to an arbitrary destination. See How to provision the Operator Specific Barring rules for details of how to enable this functionality, and MMTelOCB Behaviour for details of how it is executed.

ODB Data

The ODB data is stored as transparent data in the HSS. The SubscriberDataLookupFromHSS feature is responsible to retrieve the ODB data from the HSS. The SubscriberDataLookupFromHSS Configuration should contain the service indication as IMS-ODB-Information and the proper codec. The SubscriberDataLookupFromHSS queries the HSS and if the operator had configured any ODB rules for that subscriber then user data will be returned, parsed and then stored in a session state field MMTelODBServiceData. The MMTelICB and MMTelOCB will use the session state field MMTelODBServiceData to evaluate the ODB conditions before the subscriber defined conditions.

Enabling ODB

ODB can be enabled using the DisableQuery option in the SubscriberDataLookupFromHSS. The sdk installer provides an option for setting DisableQuery on IMS and DisableQuery on MMTel.

Supported Barring Rule Conditions

The sections below show XML data stored in the HSS for the supported conditions. The outgoing conditions are evaluated by the MMTelOCB feature, the incoming conditions are evaluated by MMTelICB and the operator type conditions are evaluated by both features.

Enabling ODB

The HSS IMS-ODB-Information query can be enabled using the DisableQuery option in the SubscriberDataLookupFromHSS.

Bar all outgoing communications

Bar all of the outgoing communications, The OutgoingBarring tag is set to "0".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <OutgoingBarring>0</OutgoingBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar all outgoing international communications

Barring of all outgoing communications to international destinations. The OutgoingBarring tag is set to "1".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <OutgoingBarring>1</OutgoingBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar all outgoing communications when international ex-hplmnc

Barring of all outgoing communications to international destinations excluding home network. The OutgoingBarring tag is set to "2".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
           <OdbForImsMultimediaTelephonyServices>
            <OutgoingBarring>2</OutgoingBarring>
           </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar all outgoing communications when roaming

Barring of all outgoing communications roaming outside the home PLMN country. The OutgoingBarring tag is set to "3".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <OutgoingBarring>3</OutgoingBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar all incoming communications

Barring of all incoming communications, the IncomingBarring tag is set to "0".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
           <IncomingBarring>0</IncomingBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar all incoming communications when roaming

Barring of all incoming communications when roaming outside the home PLMN country. The IncomingBarring tag is set to "1".

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
           <IncomingBarring>1</IncomingBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar Outgoing Premium-Rate Communication

The premium-rate barring options can be described as follows:

Option Description

PremiumRateCommunicationsInformation

Bar all outgoing communications where the request URI has a "premium-rate" parameter with the value "information".

PremiumRateCommunicationsEntertainment

Bar all outgoing communications where the request URI has a "premium-rate" parameter with the value "entertainment".

PremiumRateCallsInformationWhenRoamingOutsideHplmnCountry

The same as 'PremiumRateCommunicationsInformation' but only for communications that are roaming outside of the Home PLMN Country.

PremiumRateCallsEntertainmentWhenRoamingOutsideHplmnCountry

The same as 'PremiumRateCommunicationsEntertainment' but only for communications that are roaming outside of the Home PLMN Country.

Certain prefix-based Barring Treatments will also affect the matching of these premium-rate barring options.

The information on ODB data in the HSS indicates which options should be evaluated.

Example XML:

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
           <OutgoingPremiumRateBarring>
               <PremiumRateCommunicationsInformation>
                    true
               </PremiumRateCommunicationsInformation>
               <PremiumRateCommunicationsEntertainment>
                    true
               </PremiumRateCommunicationsEntertainment>
               <PremiumRateCallsInformationWhenRoamingOutsideHplmnCountry>
                    true
               </PremiumRateCallsInformationWhenRoamingOutsideHplmnCountry>
               <PremiumRateCallsEntertainmentWhenRoamingOutsideHplmnCountry>
                    true
               </PremiumRateCallsEntertainmentWhenRoamingOutsideHplmnCountry>
           </OutgoingPremiumRateBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Operator Specific Barring Rules

The Operator Specific Barring Types conditions specifies 4 types of user defined rules. The rules are stored in the VoLTE profiles and follow the same schema for Simservs RuleSet. The information on ODB data in the HSS just indicates which rule types should be evaluated.

The example below indicated that all 4 rules should be evaluated.

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
           <OperatorSpecificBarring>
	      <Type1>true</Type1>
	      <Type2>true</Type2>
	      <Type3>true</Type3>
	      <Type4>true</Type4>
    	  </OperatorSpecificBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar Invocation of communication transfer

This condition prevents the Explicit Call Transfer feature MMTelECT from running. The conditions are:

Condition Description

SimpleInvocationOfCommunicationTransferBarring

Prevents user-invoked call transfers from happening. Has three options:

  • Barring of Invocation of Communication Transfer (0)

  • Barring of Invocation of Communication Transfer Where at least one leg is charged (1) Not Supported

  • Barring of Invocation of Communication Transfer Where at least one leg is charged at international rates (2) Not Supported

InvocationOfChargeableCommunicationTransferBarring

Prevents user-invoked call transfers when both calls are charged to the served user. Not Supported

MultipleInvocationOfCommunicationTransferBarring

Prevents a user-invoked call transfer when there is an existing transferred call for the served user.

 
<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <SimpleInvocationOfCommunicationTransferBarring>
               0
            </SimpleInvocationOfCommunicationTransferBarring>

    	    <InvocationOfChargeableCommunicationTransferBarring>
               true
            </InvocationOfChargeableCommunicationTransferBarring>

   	    <MultipleInvocationOfCommunicationTransferBarring>
               true
            </MultipleInvocationOfCommunicationTransferBarring>

          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar Management of Supplementary Services

This condition is evaluated during provisioning time when the subscriber tries to change its own supplementary services configuration via XCAP Interface. If the condition is set to true the XCAP servers will deny any change to subscriber change attempt.

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <BarringOfSupplementaryServicesManagement>
               true
            </BarringOfSupplementaryServicesManagement>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>

Bar Registration of Diverted To Address

This condition is evaluated during provisioning time when the subscriber tries to change the target to address of the supplementary services via XCAP Interface. Currently the diverted to address is present at the Communication Diversion (CDIV) settings. It is the <target> sub-element of the <forward-to> element in a CDIV rule’s actions.

The bar condition can have the following values:

  • 0 Barring of Registration of any communication diverted-to address

    • currently supported

  • 1 Barring of Registration of any international communication diverted-to address

    • not supported yet

  • 2 Barring of Registration of any international communication diverted-to address EXHPLMNC

    • not supported yet

<?xml version="1.0" encoding="utf-8"?>
<Sh-Data>
    <RepositoryData>
        <ServiceIndication>IMS-ODB-Information</ServiceIndication>
        <SequenceNumber>1</SequenceNumber>
        <ServiceData>
         <OdbForImsOrientedServices xmlns="odb.mmtel.sentinel.volte.opencloud.com">
          <OdbForImsMultimediaTelephonyServices>
            <DivertedToAddressRegistrationBarring>
               0
            </DivertedToAddressRegistrationBarring>
          </OdbForImsMultimediaTelephonyServices>
         </OdbForImsOrientedServices>
        </ServiceData>
    </RepositoryData>
</Sh-Data>
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Sentinel VoLTE Version 4.0.0