Samsung Mobile WiMAX Outdoor RAS SPI-2331, System Description

Page: 75 / 96

CHAPTER 4. Message Flow
4-18 © SAMSUNG Electronics Co., Ltd.
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:
Figure 4.12 Inter-ASN Handover (CSN-Anchored Mobility)
MS T-RAS
HA
T-ACR
S-ACR
(Anchor)
AAA
Inter-ASN HHO
PMIP Re-registration
1) Relocation Notify
2) Relocation Notify Ack
3) Relocation Request
4) Relocation Response
Pull
Model
Push
Model
6) Anchor DPF HO Trigger
7) Anchor DPF HO Request
8) MIP REG REQ
9) MIP REG RSP
12) MIP REG REQ
13) MIP REG RSP
CMIP Re-registration
10) Agent Advertisement
11) CMIP REG REQ
14) CMIP REG RSP
15) Anchor DPF HO Response
20) STR
21) STA
Pull Mode
5) Re-authentication
16) Registration Revocation Request
17) Registration Revocation Ack
18) ACR
19) ACA