Pending Traffic Treatment over Diameter Interfaces

The SMF implements the 3GPP recommendations for interworking of Evolved Packet System (EPS) and Diameter Interfaces such as Gy for Online Charging System (OCS) for prepaid subscribers, where it supports pending traffic management during the quota refresh procedure.

Pending Traffic Treatment (PTT) allows pass or drop treatment of traffic that flows at the User Plane Function (UPF) while waiting for Quota Information from P-GW. The traffic is treated based on the following supported configurations under the credit-control group in the Active Charging Service in UPF:

  • pending-traffic-treatment noquota pass

  • pending-traffic-treatment noquota drop

  • pending-traffic-treatment noquota limited-pass volume < in bytes, ranging from 1 to 4294967295>

  • pending-traffic-treatment quota-exhausted pass

  • pending-traffic-treatment quota-exhausted drop

Note
To enable pending traffic treatment over diameter interfaces no configuration is required under the SMF.

For more information, see the Sample UPF Configuration chapter in the UCC 5G UPF Configuration and Administration Guide and the Credit Control Configuration Mode Commands chapter in the Command Line Interface Reference, Modes C - D.