Cisco ASR 5000 Series - Controlled Anchor ASN Gateway to Non-Anchor ASN Gateway Handover

ASN Gateway Overview
ASN Call Procedure Flows ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 53. 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.