Central database containing user subscription and authentication data.
Description
The Home Subscriber Server (HSS) is the central database that contains user-related and subscription-related information. It supports the network entities handling calls, sessions, and mobility management.
The HSS stores authentication vectors, user profiles, service subscription states, and location information. It interfaces with the MME for authentication and authorization.
Purpose & Motivation
The HSS evolved from the HLR (Home Location Register) of 2G/3G networks, enhanced to support:
- IP Multimedia Subsystem (IMS) services - All-IP architecture requirements - Enhanced security with EPS-AKA - Diameter-based interfaces
Key Features
- ✓Subscription data storage
- ✓Authentication vectors
- ✓User profile management
- ✓Service authorization
- ✓Location management