S3 Interface

S3 interface is between the MME and SGSN.

Overview

S3 interface is between the MME and SGSN. It uses GTP V2 over UDP transport protocol.

Network Diagram

Messages

  • Create Session Request/Response
  • Modify Session Request/Response
  • Delete Session Request/Response

Call Flows

Standards

  • 3GPP TS 29.274