Manages radio links and dedicated channel allocation.
Verifies user identities and provides security keys for encryption.
Includes features such as call forwarding, call waiting, and multi-party conferences. GSM – Architecture, Protocols and Services
Often called the core network, it performs call switching and manages subscriber mobility. Key components include:
GSM uses a layered protocol structure for communication between the mobile station and the network: Manages radio links and dedicated channel allocation
A permanent database containing subscriber profiles and their last known location.
Uses the Subscriber Identity Module (SIM) to store unique identity information. Security is maintained through a challenge-response authentication mechanism and over-the-air encryption using algorithms like A5. GSM – Architecture, Protocols and Services
The central node for call routing and management.