User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.02

Access Control Router (ACR)

ACR, which is the system between CSN and RAS, enables several RASs to interwork with

IP network, sends/receives traffic between external network and MS, and controls QoS.

The ACR interfaces with the Authentication, Authorization and Accounting (AAA) server

using the Diameter/RADIUS protocols, and with the Policy & Charging Rules Function

(PCRF) server using the Diameter protocol. In this way, the ACR provides interfaces for

the NEs of the CSN.

Mobile WiMAX System Manager (WSM)

WSM provides the management environment for the operator to operate and maintain ACR

and RAS.

Home Agent (HA)

HA accesses other networks or private networks and enables Mobile IP (MIP) users to

access internet. HA interworks with ACR that performs Foreign Agent (FA) function for

Mobile IPv4 and interworks with MS to exchange data for Mobile IPv6.

Dynamic Host Configuration Protocol (DHCP) Server

The DHCP server allocates IP addresses to simple IP users. When an MS requests an IP

address allocation, the DHCP server allocates an IP address in interoperation with the ACR

that functions as the DHCP relay agent and sends it to the ACR.

Authorization, Authentication and Accounting (AAA) Server

AAA server interfaces with ACR and carries out subscriber authentication and accounting

functions. The AAA server interfaces with ACR via Diameter/RADIUS protocol and

provides Extensible Authentication Protocol (EAP) certification.

Policy & Charging Rules Function (PCRF) Server

The PCRF server is the server that manages the service policy and interfaces with ACR via

Diameter protocol. The PCRF server sends QoS setting information for each user session

and accounting rule information to ACR.