S2b Interface

S2b interface is between the PGW and ePDG.

Overview

S2b interface is between the PGW and ePDG. It uses the PMIPv6 protocol to establish WLAN sessions between the UE and the PGW.

Network Diagram

Messages

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

Call Flows

Standards

  • 3GPP TS 29.274