User's Manual

CHAPTER 4. Message Flow
4-4 © SAMSUNG Electronics Co., Ltd.
(Continued)
Classification Description
(31)~(38) This is the procedure for allocating an IP address to the MS that uses the simple
IP method. If the MS requests the DHCP procedure to receive an allocated IP
address, the ACR performs the DHCP relay agent function to receive a simple IP
address from the external DHCP server and then sends the received IP address
to the MS.
(39)~(40) When the Diameter protocol is used, it is notified that accounting has begun for
the service flow using the ACR/ACA message. When the RADIUS protocol is
used, the Accounting Request/Accounting Response message is used.
4.1.2 Authentication
At the Time of Initial Access
The MS authentication procedure performed in ‘4.1.1 Initial Access’ is as follows:
Figure 4.2 Authentication Procedure (At the time of initial access)
(PKMv2 EAP-Transfer)
MS RAS ACR
AAA
Repeat
2) PKM-RSP
(PKMv2 EAP-Transfer)
3) PKM-REQ
8) PKM-RSP
(PKMv2 EAP-Transfer)
9) PKM-REQ
(
PKMv2 EAP
-
Transfer
)
14) PKM-RSP
(PKMv2 EAP-Transfer)
17) PKM-RSP
18) PKM-REQ
(PKMv2 SA-TEK-Request)
19) PKM-RSP
20) PKM-REQ
(PKMv2 Key Request)
21) PKM-RSP
(PKMv2 Key Reply)
(PKMv2 SA-TEK-Challenge)
(PKMv2 SA-TEK-Response)
0) MS_PreAttachment_Ack
1) AuthRelay-EAP-Transfer
4) AuthRelay-EAP-Transfer
7) AuthRelay-EAP-Transfer
10) AuthRelay-EAP-Transfer
15) Key_Change_Directive
16) Key_Change_Directive_Ack
5) Diameter: DER/RADIUS: Access Request
6) Diameter: DEA/RADIUS: Access Challenge
11
)
Diameter: DER
/
RADIUS: Access Re
q
uest
12) Diameter: DEA/RADIUS: Access Accept
13) AuthRelay-EAP-Transfer