Content for TS 23.015 Word version: 18.0.0

1… 2… 2.2… 2.3… 2.4… 2.5… 2.6… 2.7… 2.8… 3…

2.4 Barring of Supplementary Services Access 2.4.1 Application or Change of Barring in the HLR 2.4.2 Invocation of Barring 2.4.3 Operator Determined Barring of access to supplementary service not supported in VLR
...

2.4 Barring of Supplementary Services Access p. 13

Barring of supplementary services access encompasses the general barring of supplementary services management category specified in TS 22.041 and the specific categories of barring of registration of a call forwarded-to number and barring of invocation of call transfer.

2.4.1 Application or Change of Barring in the HLR p. 13

If barring of supplementary services access is applied to a subscription (or existing barring of supplementary services access is modified or removed) by administrative action in the HLR, the HLR will update the subscription information accordingly, and, if necessary, transfer the updated subscription information to the VLR using one or more Insert Subscriber Data operations, as shown in Figure 2.1.1-1.

If the VPLMN does not support Operator Determined Barring of supplementary service access, the VLR shall indicate this in the acknowledgement to 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.

2.4.2 Invocation of Barring p. 14

Barring of supplementary services access is invoked in the HLR or the VLR, depending on the supplementary service operation.

Barring of access to the following supplementary service operations is invoked in the HLR:

registration;
erasure;
activation;
deactivation;
password registration;
processing unstructured SS data.

An indicative message flow diagram for the handling in the HLR of Operator Determined Barring of access to supplementary services is given in Figure 2.4.2-1.

Copy of original 3GPP image for 3GPP TS 23.015, Fig. 2.4.2-1: Operator Determined Barring of Access to Supplementary Services in the HLR

Figure 2.4.2-1: Operator Determined Barring of Access to Supplementary Services in the HLR
(⇒ copy of original 3GPP image)

Barring of access to the following supplementary service operations is invoked in the VLR:

interrogation;
invocation;
control of PLMN specific supplementary services;
processing unstructured SS data.

An indicative message flow diagram for the handling in the VLR of Operator Determined Barring of access to supplementary services is given in Figure 2.4.2-2.

Copy of original 3GPP image for 3GPP TS 23.015, Fig. 2.4.2-2: Operator Determined Barring of Access to Supplementary Services in the VLR

Figure 2.4.2-2: Operator Determined Barring of Access to Supplementary Services in the VLR
(⇒ copy of original 3GPP image)

2.4.3 Operator Determined Barring of access to supplementary service not supported in VLR p. 15

If the VLR does not support Operator Determined Barring of access to supplementary services the HLR shall take the following actions:

The VLR supports only phase 1:

If the HLR receives a request which should normally be barred by the VLR the HLR shall reject the request with the appropriate phase 1 error (illegal SS operation or system failure).

The VLR supports phase 2 but does not support this Operator Determined Barring category:

If the HLR receives a request which should normally be barred by the VLR the HLR shall reject the request instead of the VLR.

Note that requests handled locally by the VLR (e.g. interrogation) will not be barred.