Restoration relies on specific signaling flows and data synchronization methods:
: Mechanisms for the Proxy-CSCF to recover its relationship with the user equipment (UE) after a restart. 123380
The primary goal of TS 23.380 is to ensure service continuity and high availability within the IMS core network. While network nodes (like the S-CSCF, HSS, and P-CSCF) are designed for reliability, maintenance or unforeseen failures can cause data loss or corruption. This document standardizes automatic restoration procedures to minimize user impact when these events occur. 2. Core Restoration Scenarios Restoration relies on specific signaling flows and data
: Integrated support for LTE and 5G networks, ensuring that high-speed packet-based services remain resilient. Summary Table: Typical Restoration Nodes Role in Restoration Primary Data Stored S-CSCF Serving node; handles session control SIP proxies, Contact info, Auth info HSS Central database; restores S-CSCF data Private User Identity, Registration Sets P-CSCF Entry point; detects UE status UE local IP, Security associations Summary Table: Typical Restoration Nodes Role in Restoration
: Focused on basic IMS recovery for GSM and UMTS.
: Procedures for recovering the Home Subscriber Server, which acts as the central database for user identities and profiles.
The specification has evolved through multiple "Releases" to keep pace with mobile technology: