The specification covers several critical failure and recovery scenarios across the IMS domain:
: Procedures for recovering the Home Subscriber Server, which acts as the central database for user identities and profiles. 123380
: Procedures for when a Serving-Call Session Control Function (S-CSCF) fails or loses registration data. It defines how the Home Subscriber Server (HSS) and other nodes collaborate to re-register users or restore sessions. The primary goal of TS 23
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 and P-CSCF) are designed for reliability
Restoration relies on specific signaling flows and data synchronization methods: