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3GPP Gxx  Application ( 16777266 )

The Gxx reference point is located between the Policy and Charging Rules Function (PCRF) and the Bearer Binding and Event Reporting Function (BBERF). The Gxc interface applies when the BBERF is located in the Serving Gateway (SGW) and the Gxa interface applies when the BBERF is located in a trusted non-3GPP Access (AGW). The Gxx reference point is used for provisioning, update and removal of QoS rules from the PCRF to the BBERF and transmission of traffic plane events from the BBERF to the PCRF.
Reference:  3GPP TS29.212   View
MESSAGES

Name

Code

Re-Auth-Request Gxx 258
Re-Auth-Answer Gxx 258
Credit-Control-Request Gxx 272
Credit-Control-Answer Gxx 272