14.3 Operator Determined Barring (ODB)

23.2053GPPBearer-independent circuit-switched core networkRelease 17Stage 2TS

NOTE: The subsequent clauses in 14.3 describe the impacts of "Barring of Outgoing Calls" and "Barring of Incoming Calls" on Bearer Independent CS CN. Other flavours of Operator Determined Barring may be supported by the Bearer Independent CS CN. However no impacts caused by these other flavours are identified.

14.3.1 Barring of Outgoing Calls

If the mobile station attempts to connect to an address determined to be barred by the Operator Determined Barring service, the call shall be cleared as described in clause 7, Call Clearing.

Otherwise, the call is established as described in clause 6, Call Establishment.

14.3.2 Barring of Incoming Calls

If the incoming call to the mobile station is determined to be barred by the Operator Determined Barring service, the call shall be barred. Otherwise the call shall be delivered as described in clause 6, Call Establishment.

If the GMSC connects the call to a recorded announcement due to Operator Determined Barring, the GMSC server selects the MGW before providing the in-band information. It is possible that the MGW selection is based on an MGW-Id received from the preceding node.

The incoming side bearer establishment is handled in the GMSC server as described for the mobile terminating call using either forward or backward bearer establishment.

In-band information may be provided to the calling subscriber only when both of the following conditions are satisfied:

1. Either:

a. The incoming IAM indicated that the Continuity message will follow, and a Continuity message has been received, or

b. The incoming IAM did not indicate that the Continuity message will follow;

2. Notification indicating successful completion of the incoming side bearer set-up has been received from the MGW using the Bearer Established procedure.

The GMSC server provides the MGW with the announcement identification and requests the MGW to notify the announcement completion using the Play Announcement procedure as described in clause 4.6.

After the possible announcement has been completed the GMSC server initiates the call release as described in the clause 7, Call Clearing.