CSN – Core Service Network
It is a combination of a set of network functions and provides IPconnections for the WiMAX subscribers. The CSN consists of the router, AAA agent or server, subscriber database and Internet gateway equipment. The CSN can be a new network entity in a new WiMAX system or can realize the functions of CSN through some existing network equipment.
Main functions of the CSN:
- Establish the connections between subscribers and assign IP addresses
- Perform the Internet access
- Use the AAA agent or server
- Control the user system parameters-based QoS and license
- Establish and manage tunnels between the ASN and the CSN
- Perform the subscriber accounting and settlement
- Perform the inter-ASN mobility management
- Realize WiMAX services, such as location based service, point-to-point service, multicast service, IMS, and emergency call.
