User's Manual

Mobile WiMAX Indoor RAS SPI-2210 System Description/Ed.07

1.4 Mobile WiMAX System Functions

The figure below shows the functions of the ASN systems (ACR and RAS) based on Profile C.

Each block name complies with the standard of Mobile WiMAX NWG.

Figure 1.2 Configuration of Mobile WiMAX System Functions (Based on Profile C)

The ACR supports the Convergence Sublayer (CS) and performs the packet classification

and Packet Header Suppression (PHS) functions. When the ACR carries out the header

compression function, it supports ROHC defined in the NWG standard.

In addition, the ACR performs the paging controller and location register functions for a

MS in Idle Mode.

In authentication, the ACR performs the authenticator function and carries out the key

distributor function to manage the higher security key by interworking with the AAA server

as an AAA client. At this time, RAS performs the key receiver function to receive the

security key from the key distributor and manage it.

The ACR interworks with the AAA server of CSN for authentication and charging services

and with the HA of CSN for Mobile IP (MIP) service. The ACR as FA of MIP supports

Proxy MIP (PMIP).

ASN

ASN-GW (ACR)

Location Register

Context Function

Handover Function

(Handover Relay)

Authenticator

Key Distributor

SFA

AAA Client

IP Packet Forwarding

Header Compression

Packet Classification

Paging Controller

MIP FA PMIP client

BS (RAS)

Context Function

Handover Function

(Handover Control)

Key Receiver

RRC & RRA

ARQ Operation

MAC PDU

Encapsulation/PHY

SFM

(Admission Control)

DHCP relay agent