Support of emergency services over WLAN access to 3GPP evolved packet core for unauthenticated users

Abstract

In an embodiment, a method for support of emergency services over WLAN access to 3GPP Evolved Packet Core EPC for unauthenticated Users comprises: - in response to a request to provide a user identity for access authentication, a User Equipment UE providing a specific NAI-based user identity having a realm part indicating unauthenticated access for emergency services, - an authenticator, such as TWAN entity for Trusted WLAN access or e PDG for Untrusted WLAN access, routing a message from said UE, based on said realm part, towards a specific 3GPP AAA Server serving a domain dedicated to unauthenticated access for emergency services, - said specific 3GPP AAA Server granting access to said UE, and providing specific authorization data that allow network access for emergency services to said UE.