The S9 interface is a 4G interface between the Visiting PCRF and Home PCRF.

In wireless applications, the S9 interface is a 4G interface between the Visiting PCRF and Home PCRF.

Overview

S9 interface is between the Visiting PCRF and Home PCRF.  It uses Diameter over UDP transport protocol.

Network Diagram

Messages

Call Flows

Standards

  • 3GPP TS 29.212
  • 3GPP TS 29.215

Related Products and Protocols