User's Manual

Mobile WiMAX Outdoor RAS SPI-2210 System Description/Ed.05
© SAMSUNG Electronics Co., Ltd. 4-19
Inter-ASN Handover: ASN-Anchored Mobility
Inter-ASN handover is divided into the ASN-anchored mobility method via the R4
interface and the CSN-anchored mobility method via the R3/R4 interface. The following
figure indicates the inter-ASN handover procedure of the ASN-anchored mobility method,
the Serving ACR (S-ACR) performs the anchor function.
Figure 4.12 Inter-ASN Handover (ASN-Anchored Mobility)
The HO signaling procedure is the same with the inter-RAS handover procedure, however
in the HO signaling procedure, the procedure of exchanging the HO signaling message via
the R4 interface is added between the S-ACR and the Target ACR (T-ACR).
35) Path Reg Ack
MS S-RAS T-ACR T-RAS1 T-RAS2
1) MOB-MSHO-REQ
S-ACR
AK Context Transfer
2) HO-Request
3) HO-Request
4) HO-Request
5) HO-Response
6) HO-Response
7) HO-Response
8) MOB-BSHO-RSP
9) HO-Ack
10) HO-Ack
11) HO-Ack
12) MOB-HO-IND
13) HO-Confirm 14) HO-Confirm
15) HO-Confirm
21) Context-Request
20) Context-Request
22) Context-Report
23) Context-Report
17) HO-Ack 16) HO-Ack
18) HO-Ack
R4 Data Path Setup
25) Path Pre-Reg Request
26) Path Pre-Reg Response
29) Path Pre-Reg Ack
28) Path Pre-Reg Ack
19) Fast Ranging IE ()
30) RNG-REQ
37) RNG-RSP
38) MAC PDU with SN Report Header (Opt.) or BW Request with 0 (Opt.)
40) HO-Complete
39) HO-Complete
41) HO-Complete
46) Path De-Reg Request
47) Path De-Reg Response
42) CMAC_COUNT_UPDATE
45) CMAC_COUNT_UPDATE Ack
43) CMAC_COUNT_
UPDATE
44) CMAC_COUNT_
UPDATE Ack
32) Path Reg Request
36) Path Reg Ack
24) Path Pre-Reg Request
27) Path Pre-Reg Response
34) Path Reg Response
31) Path Reg Request
33) Path Reg Response