A.7 Charging Characteristics in TDF

32.2513GPPCharging managementPacket Switched (PS) domain chargingRelease 17Telecommunication managementTS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Upon IP-CAN session establishment, the P-GW forwards the Charging Characteristics parameter to the TDF (resp. PCRF then the TDF). The TDF shall apply Charging Characteristics to its TDF session. It shall either apply the supplied parameters, or it may be configured to ignore the supplied Charging Characteristics in any combination of the following cases:

– visiting case, i.e. the subscriber belongs to a different PLMN;

– roaming case (home routed traffic);

– home case, i.e. the subscriber belongs to the same PLMN as the TDF; or

– unconditionally, i.e. it always ignores the supplied parameters.

If the TDF ignores the supplied parameters, it shall nevertheless accept the TDF session request. It shall then apply its own pre‑configured Charging Characteristics as appropriate, i.e. the home, visiting or roaming behaviour. The TDF shall support the configuration of one set of default Charging Characteristics (i.e. home, visiting, roaming) for each of APNs.

Annex B (normative):
Tx expiration; Failure Handling procedure and session failover mechanism description

CREDIT-CONTROL FAILURE HANDLING	Initial CCR, Tx expiration	Initial CCR, Tx expiration	Update CCR, Tx expiration	Update CCR, Tx expiration	Initial CCR, Tx expiration for second OCS	Update CCR, Tx expiration for second OCS
CREDIT-CONTROL FAILURE HANDLING	Session failover enabled	Session failover disabled	Session failover enabled	Session failover disabled	Initial CCR, Tx expiration for second OCS	Update CCR, Tx expiration for second OCS
Failure Action = TERMINATE	P-GW: IP-CAN bearer is not established. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue.	P-GW: IP-CAN bearer is not established. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue.	P-GW: IP-CAN bearer is terminated.The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue. The TDF-CDR is marked.	P-GW: IP-CAN bearer is terminated. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue. The TDF-CDR is marked.	N/A	N/A
Failure Action= RETRY & TERMINATE	After Tx expiration, the P-GW/TDF sends the Reserve Units Request[Initial] to the secondary OCS. The next considerations also apply: Tx is restarted. Service is not granted yet, i.e. PDP context/TDF session is not accepted/established yet. If an answer from the first OCS is received after the first Tx expiration, it is ignored. In case the secondary OCS is not available, the behaviour is described in the column: "Initial CCR, Tx expiration for second OCS’”.	P-GW: IP-CAN bearer is not established. TDF indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue.	After Tx expiration, the P-GW/TDF will move all pending Reserve Units Request [Update] for the online session to the secondary OCS. The next considerations also apply: Tx is restarted Service is only granted until the quota is exhausted. If an answer from the first OCS is received after first Tx expiration, it is ignored. In case the secondary OCS is not available, the behaviour is described in the column: " Reserve Units Request[Update], Tx expiration for second OCS’”.	P-GW: IP-CAN bearer is terminated. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue. The TDF-CDR is marked.	P-GW: IP-CAN bearer is not established. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue.	P-GW: IP-CAN bearer is terminated. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS does not allow the service to continue. The TDF-CDR is marked.
Failure Action= CONTINUE	After Tx expiration, the P-GW/TDF sends the Reserve Units Request[Initial] to the secondary OCS. The next considerations also apply: Tx is restarted Service is not granted yet, i.e. PDP context/TDF session is not accepted/established yet. If an answer from the first OCS is received after the first Tx expiration, it is ignored. In case the secondary OCS is not available, the behaviour is described in the column: "Initial CCR, Tx expiration for second OCS’”.	P-GW: The IP-CAN bearer is accepted and the Credit-Control session is considered closed for the P-GW. The operator can limit the duration of the IP-CAN bearer. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS allows the service to continue. The TDF-CDR is marked.	After Tx expiration, the P-GW/TDF will move all pending update CCRs for the online session to the secondary OCS. The next considerations also apply: Tx is restarted Service is only granted until the quota is exhausted If an answer from the first OCS is received after the first Tx expiration, it is ignored. In case the secondary OCS is not available, the behaviour is described in the column: "Update CCR, Tx expiration for second OCS’”.	After the Tx expiration, the failure handling mechanism is immediately triggered – P-GW: The Credit-Control session is considered closed for the P-GW and access to all services is granted for an operator configurable period of time. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS allows the service to continue. The TDF-CDR is marked. All active service data flow containers shall be added to the PGW-CDR/TDF-CDR.	After the Tx expiration for the secondary OCS, the failure handling mechanism is immediately triggered: P-GW: The IP-CAN bearer is accepted and the Credit-Control session is considered closed for the P-GW. The operator can limit the duration of the IP-CAN bearer. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS allows the service to continue. The TDF-CDR is marked.	After Tx expiration for the secondary OCS, the failure handling mechanism is immediately triggered- P-GW: The Credit-Control session is considered closed for the P-GW and access to all services is granted for an operator configurable period of time. The PGW-CDR is marked. TDF: indicates to the PCRF that the charging session was terminated and the OCS allows the service to continue. The TDF-CDR is marked. All active service data flow containers shall be added to the PGW-CDR/TDF-CDR.

Annex C (informative):
Bibliography

This Annex is a placeholder for documents which are not explicitly cited in this specification.

Annex D (normative):
Fixed Broadband Access