Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
ASN Gateway Overview
▀ ASN Call Procedure Flows
▄ Cisco ASR 5000 Series Product Overview
OL-22937-01
Figure 74. Distribution of Components and Function in ASN Gateway for Handover
To ASN BS(s)
Authenticator
(AAA Client +
Accounting)
DHCP Proxy
Relay
Anchor Service
Flow Auth.
(A-SFA)
Proxy MIP Client
Anchor Data
Path Function
(A-DPF)
Mobile IP
Foreign Agent
(MIP FA)
Context Function
Paging
Controller/
Location Updator
R6
To ASN HA
R3
To ASN BS(s)
Non-Anchor ASN
GW
Authenticator
(AAA Client +
Accounting)
DHCP Proxy
Relay
Serving Service
Flow Auth
(S-SFA)
Proxy MIP Client
Serving Data
Path Function
(S-DPF)
Mobile IP
Foreign Agent
(MIP FA)
Context Function
Paging
Controller/
Location Updator
R6
R4
Anchor ASN
GW
Controlled Anchor ASN Gateway to Non-Anchor ASN Gateway Handover
For Controlled handovers, the ASN Gateway provides and/or supports the following functions:
Message Relay: The ASN Gateway provides the passive relay function for HO Request, HO Response, HO Ack,
HO Confirm, and HO Complete messages in a stateless fashion. The gateway keeps the statistics of the
different types of messages it has relayed. Retransmission of these messages is handled by the BS.
different types of messages it has relayed. Retransmission of these messages is handled by the BS.