User's Manual

CHAPTER 4. Message Flow
4-4
© SAMSUNG Electronics Co., Ltd.
(Continued)
Category 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
allocates the Simple IP address to the MS using the built-in DHCP server functions.
As an option, the ACR supports the DHCP Relay Agent function, which interoperates
with the external DHCP server.
(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
During Initial Entry
The figure below shows the MS authentication procedure during the 'Initial Entry'
procedure, as described above.
Figure 4.2 Authentication Procedure (During Initial Entry)
MS RAS ACR
AAA
Repeat
2) PKM-RSP
(PKMv2 EAP-Transfer)
3) PKM-REQ
(PKMv2 EAP-Transfer)
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