IMS AKA over TCP

IMS-AKA registration is conducted over UDP or TCP protocol only. The Oracle Communications Session Border Controller supports both transport protocols.

Within mobile IMS VoLTE/RCSe deployments, IP packets carrying SIP messages can be large due to IPv6 headers, IMS-AKA specific headers, extensive codec policies, and other 3GPP related headers. Because of this, IPv6 VoLTE signaling messages using IMS-AKA frequently exceed 1300 bytes and require TCP according to RFC3261 section 18.1.1.