1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
msc=Dinand {
background.color=white;
UE [label="\bUE"],
RGW [lblue, label="\bAP/RG\n\-\n802.1X authenticator\n"],
BNG [lblue, label="\bBNG\n\-first-hop router\nDHCP server"],
AAA [lblue, label="\bFixed AAA\n\-(proxy)"],
PDN [lyellow, label="\bPDN-GW"],
HSS [lyellow, label="\bAAA/HSS"];
block UE<->RGW-AAA-HSS: Authentication (EAP) [lblue];
++:Setup of first PDN connection [lred, line.type=none] {
UE->BNG: DHCP Request\n\-\c(red)UE prefix (HO), APN="first";
BNG->AAA: Get UE context\n\-\c(red)MAC@;
AAA->BNG: UE context\n\-\c(red)NAI, APNs, etc;
BNG->PDN: Create Bearer Request\n\-\c(red)NAI, UE IP@ (HO), APN="first";
PDN--PDN: Allocate/HO IP prefix;
BNG<-PDN: Create Bearer Response\n\-\c(red)UE prefix=b;
BNG..BNG: Generate IP@\nfrom prefix;
BNG->UE [label= "RA\n\-\c(red)prefix=a"];
BNG->UE: DHCP Ack\n\-\c(red)IP@;
};
++:Setup of second PDN connection [lyellow, line.type=none] {
pipe UE--BNG:GRE-in-MAC tunnel (key=PDNconnID) [number=no,lyellow]{
UE->BNG: DHCP Request\n\-\c(red)UE prefix (HO), APN="second";
};
BNG->PDN: Create Bearer Request\n\-\c(red)NAI, UE IP@ (HO), APN="second";
PDN--PDN: Allocate/HO IP prefix;
BNG<-PDN: Create Bearer Response\n\-\c(red)UE prefix=b;
BNG..BNG: Generate IP@\nfrom prefix;
pipe UE--BNG:GRE-in-MAC(key=PDNconnID) [number=no,lyellow]{
BNG->UE: RA\n\-\c(red)prefix=b;
BNG->UE: DHCP Ack\n\-\c(red)IP@;
};
};
pipe BNG--PDN:GTP tunnel [number=no,lred]{
UE->BNG-PDN-> [strong, number=yes]: \prUser data packet (first PDN);
};
pipe UE--BNG:"GRE-in-MAC tunnel (key=PDNconnID)" [number=no,lyellow]{
pipe BNG--PDN:GTP tunnel [number=no,lyellow]{
UE->BNG-PDN-> [strong, number=yes]: \prUser data packet (second PDN);
};
};
}
|
