Content for  TS 23.015  Word version:  19.0.0

If barring of Packet Oriented Services is applied to a subscription (or existing barring of Packet Oriented Services is modified or removed) by administrative action in the HLR, the HLR will update the subscription information accordingly, and transfer the updated subscription information to the SGSN using one or more Insert Subscriber Data operations, as shown in Figure 2.5.1-1. If the VPLMN does not support Operator Determined Barring of Packet Oriented Services, the SGSN shall indicate this in the acknowledgement of the Insert Subscriber Data message. The HLR shall then, as an operator option, apply barring of roaming as described in clause 2.3 or take any other action decided by the operator of the HPLMN.

Barring of MS initiated PDP context activation is invoked in the SGSN. If the SGSN receives a request for an MS initiated PDP context activation which is prohibited by Operator Determined Barring, the SGSN will return a negative response to the request with an appropriate error indication via the BSS/RNS to the mobile station over the radio path. Barring of MS initiated PDP context activation is performed in the SGSN while the SGSN selects the APN and GGSN. The APN operator identifier, a part of selected APN is referred to make a judgement whether to be barred or not. The detail mechanism of the ODB judgement is specified in the TS 23.060. Indicative message flow diagram for the handling of Operator Determined Barring of MS initiated PDP context activation is given in Figure 2.5.2-1.

If barring of Packet Oriented Services is applied to a subscription (or existing barring of Packet Oriented Services is modified or removed) by administrative action in the HSS, the HSS shall update the subscription information accordingly, and transfer the updated subscription information to the MME using one or more Insert Subscriber Data operations, as shown in Figure 2.5A.1-1. If the VPLMN does not support Operator Determined Barring of Packet Oriented Services, the MME shall indicate this in the acknowledgement of the Insert Subscriber Data message. The HSS shall then, as an operator option, apply barring of roaming as described in clause 2.3 or take any other action decided by the operator of the HPLMN.

Barring of EPS Bearer context establishment is invoked in the MME. If the MME receives from an UE connected over E-UTRAN an attach or PDN connectivity request which is prohibited by Operator Determined Barring, the MME shall return a negative response to the request with an appropriate error indication to the UE over the E-UTRAN radio path. For subscribers completely barred from the Packet Oriented Services, the MME shall reject attach requests. Barring of EPS Bearer context establishsment for other barring categories for the Packet Oriented Services requires the MME to selects the APN and PDN-GW before it can determine whether a request for EPS Bearer context establishment shall be barred or not:

• For "bar a subscriber from requesting Packet Oriented Services from access points that are within the HPLMN whilst the subscriber is roaming in a VPLMN", MME shall check whether or not the subscriber is located in the HPLMN. If it is not and the PDN-GW being accessed is located in HPLMN, then the MME shall reject the attach or PDN connectivity request,
• For "bar a subscriber from requesting Packet Oriented Services from access points that are within the roamed to VPLMN", MME shall check whether or not the subscriber is located in the HPLMN. If it is not and the PDN-GW being accessed is located in VPLMN, then the MME shall reject the attach or PDN connectivity request.

Indicative message flow diagram for the handling of Operator Determined Barring of EPS Bearer context establishment is given in Figure 2.5A.2-1.

If barring of Packet Oriented Services is applied to a subscription (or existing barring of Packet Oriented Services is modified or removed) by administrative action in the UDM, the UDM shall update the subscription information accordingly, and transfer the updated subscription information to the AMF/SMF using Nudm_SDM Notification operation, as shown in Figure 2.5B.1-1.

Barring of PDU Session establishment is invoked in the SMF. If the SMF receives from an UE connected over 5GS a PDU Session connectivity request which is prohibited by Operator Determined Barring, the SMF shall return a negative response to the request with an appropriate error indication to the UE over the 5G radio path. For subscribers completely barred from the Packet Oriented Services, the AMF may reject the registration requests. Barring of PDU Session establishment for other barring categories for the Packet Oriented Services, the SMF determines whether a request for PDU Session establishment shall be barred or not based on the subscription data from UDM as below:

• For "bar subscribers completely from the Packet Oriented Services", the SMF shall reject the PDU connectivity request.
• For "bar a subscriber from requesting Packet Oriented Services from access points that are within the HPLMN whilst the subscriber is roaming in a VPLMN", if the subscriber is not located in the HPLMN and the SMF being accessed is located in HPLMN, then the SMF shall reject the PDU connectivity request,
• For "bar a subscriber from requesting Packet Oriented Services from access points that are within the roamed to VPLMN", if the subscriber is not located in the HPLMN and the SMF being accessed is located in VPLMN, then the SMF shall reject the PDU connectivity request.

The AMF may also determine a request for PDU Session establishment shall be barred or not based on above scenarios and indicate the SMF to reject the request. Indicative message flow diagram for the handling of Operator Determined Barring of PDU Session establishment is given in Figure 2.5B.2-1.