IMS-AKA

The Oracle Communications Unified Session Manager supports IP Media Subsystem-Authentication and Key Agreement (IMS-AKA).

Defined in 3GPPr7 (specifications in TS 33.203 and call flows in TS 24.228), IMS-AKA can be used as a framework for authentication and for securing the signaling path between a UE and the Oracle Communications Unified Session Manager (when the Oracle Communications Unified Session Manager is acting as a P-CSCF or as a B2BUA) across the Gm interface.

In addition, the Oracle Communications Unified Session Manager’s serving as an IMS-AKA termination point is valuable because it allows IMS-AKA use behind by multiple endpoints sitting behind a NAT device. IMS-AKA support also works when there are no NAT devices between endpoints and the Oracle Communications Unified Session Manager acting as a P-CSCF, and when the Oracle Communications Unified Session Manager sits behind a third-party P-CSCF. In addition, you can use IMS-AKA when the endpoint uses SIP UDP.