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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.
ASN
ASN GW(ACR)
BS(RAS)
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 both
Proxy MIP(PMIP) and Client MIP(CMIP).
© SAMSUNG Electronics Co., Ltd.
Mobile WiMAX Outdoor RAS SPI-2331 System Description/Ed.02
Paging Controller
Location Register
Context Function
Handover Function
(Handover Relay)
Context Function
Handover Function
(Handover Control)
MIP FA
Authenticator
Key Distributor
SFA
AAA Client
R6
Key Receiver
RRC & RRA
SFM
(Admission Control)
PMIP client
IP Packet Forwarding
Header Compression
Packet Classification
ARQ Operation
MAC PDU
Encapsulation/PHY
1-5
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