ASN Call Procedure Flows ▀
Cisco ASR 5000 Series Product Overview ▄
ASN Call Procedure Flows
This section provides information on the function of the ASN Gateway in a WiMAX network and presents call
procedure flows for different stages of session setup.
Functional Components for Handover
This section describes the functional components used during handover between ASN Gateways on R4 and R6
interfaces.
Anchor ASN Gateway
The anchor ASN Gateway is the ASN Gateway that holds the anchor data path functions for a given MS. As shown in
the following figure, the anchor ASN Gateway hosts the following functions:
Authenticator (includes Accounting Client)
Anchor DP function
DHCP proxy
PMIP client
MIP FA
Anchor SFA
DHCP proxy function
The ASN Gateway service IP address is the R6 and R4 tunnel endpoint and handles both R6 and R4 traffic.
Anchor Session
The following identifiers identify the anchor ASN Gateway session:
MSID
MS NAI
MS IP address
DHCP MAC address
The ASN Gateway session consists of an access R6 session and a MIP FA network session. The R6 session has a GRE
data path to a base station for an active session. In this session the ASN Gateway service IP address is the R6 and R4
tunnel endpoint and handles both R6 and R4 traffic.
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