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CHAPTER 4. Message Flow
Inter-ASN Handover: CSN-Anchored Mobility
The following is handover of the CSN-anchored mobility method among the types of inter-
ASN handover, the anchor function is relocated from the Serving ACR(S-ACR) to the
Target ACR(T-ACR).
CSN-anchored mobility is composed of the process that Authenticator/DPF Anchor is
relocated to the target ACR after ASN-anchored mobility handover is performed.
For convenience, the case that T-ACR triggers the relocation is defined in pull mode and
the other case that S-ACR triggers is in push mode. Samsung's Mobile WiMAX system
supports both pull mode and push mode.
The CSN-anchored mobility method follows the MIP standard, and the NWG defines the
PMIP and the CMIP for the MIP method. The first part of the CSN-anchored handover
signaling process is the same as the procedure of ASN-anchored mobility handover and the
procedure after the ASN-anchored handover is as follows:
MS
T-RAS
PMIP Re-registration
CMIP Re-registration
10) Agent Advertisement
11) CMIP REG REQ
14) CMIP REG RSP
4-18
T-ACR
Inter-ASN HHO
1) Relocation Notify
Pull
Model
2) Relocation Notify Ack
3) Relocation Request
Push
Model
4) Relocation Response
5) Re-authentication
6) Anchor DPF HO Trigger
7) Anchor DPF HO Request
15) Anchor DPF HO Response
Figure 4.12 Inter-ASN Handover (CSN-Anchored Mobility)
S-ACR
AAA
(Anchor)
Pull Mode
8) MIP REG REQ
9) MIP REG RSP
12) MIP REG REQ
13) MIP REG RSP
16) Registration Revocation Request
17) Registration Revocation Ack
18) ACR
19) ACA
20) STR
21) STA
© SAMSUNG Electronics Co., Ltd.
HA
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