Cisco Cisco Packet Data Interworking Function (PDIF) Guía Para Resolver Problemas
ASN Gateway Overview
▀ ASN Call Procedure Flows
▄ Cisco ASR 5000 Series Access Service Network Gateway Administration Guide
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Figure 19. Distribution of Components and Function in ASN Gateway for Handover
T o A S N B S (s )
A u th e n tic a to r
(A A A C lie n t +
A c c o u n tin g )
D H C P P ro x y
R e la y
A n c h o r S e rv ic e
F lo w A u th .
(A -S F A )
P ro x y M IP C lie n t
A n c h o r D a ta
P a th F u n c tio n
(A -D P F )
M o b ile IP
F o re ig n A g e n t
(M IP F A )
C o n te x t F u n c tio n
P a g in g
C o n tro lle r/
L o c a tio n U p d a to r
R 6
T o A S N H A
R 3
T o A S N B S (s )
N o n -A n c h o r A S N
G W
A u th e n tic a to r
(A A A C lie n t +
A c c o u n tin g )
D H C P P ro x y
R e la y
S e rv in g S e rv ic e
F lo w A u th
(S -S F A )
P ro x y M IP C lie n t
S e rv in g D a ta
P a th F u n c tio n
(S -D P F )
M o b ile IP
F o re ig n A g e n t
(M IP F A )
C o n te x t F u n c tio n
P a g in g
C o n tro lle r /
L o c a tio n U p d a to r
R 6
R 4
A n c h o r A S N
G W
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.