7.2 Signalling Message Formats
09.603GPPGeneral Packet Radio Service (GPRS)GPRS Tunnelling Protocol GPT) across the Gn and Gp InterfaceRelease 1998TS
GTP defines a set of signalling messages between two associated GSNs. The signalling messages to be used are defined in the table below.
Table 1: Signalling messages
Message Type value (Decimal) |
Signalling message |
Reference |
0 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
1 |
Echo Request |
7.4.1 |
2 |
Echo Response |
7.4.2 |
3 |
Version Not Supported |
7.4.3 |
4 |
Node Alive Request |
GSM 12.15 |
5 |
Node Alive Response |
GSM 12.15 |
6 |
Redirection Request |
GSM 12.15 |
7 |
Redirection Response |
GSM 12.15 |
8-15 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
16 |
Create PDP Context Request |
7.5.1 |
17 |
Create PDP Context Response |
7.5.2 |
18 |
Update PDP Context Request |
7.5.3 |
19 |
Update PDP Context Response |
7.5.4 |
20 |
Delete PDP Context Request |
7.5.5 |
21 |
Delete PDP Context Response |
7.5.6 |
22 |
Create AA PDP Context Request |
7.5.7 |
23 |
Create AA PDP Context Response |
7.5.8 |
24 |
Delete AA PDP Context Request |
7.5.9 |
25 |
Delete AA PDP Context Response |
7.5.10 |
26 |
Error Indication |
7.5.11 |
27 |
PDU Notification Request |
7.5.12 |
28 |
PDU Notification Response |
7.5.13 |
29 |
PDU Notification Reject Request |
7.5.14 |
30 |
PDU Notification Reject Response |
7.5.15 |
31 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
32 |
Send Routeing Information for GPRS Request |
7.6.1 |
33 |
Send Routeing Information for GPRS Response |
7.6.2 |
34 |
Failure Report Request |
7.6.3 |
35 |
Failure Report Response |
7.6.4 |
36 |
Note MS GPRS Present Request |
7.6.5 |
37 |
Note MS GPRS Present Response |
7.6.6 |
38-47 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
48 |
Identification Request |
7.7.1 |
49 |
Identification Response |
7.7.2 |
50 |
SGSN Context Request |
7.7.3 |
51 |
SGSN Context Response |
7.7.4 |
52 |
SGSN Context Acknowledge |
7.7.5 |
53-239 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
240 |
Data Record Transfer Request |
GSM 12.15 |
241 |
Data Record Transfer Response |
GSM 12.15 |
242-254 |
For future use. Shall not be sent. If received, shall be treated as an Unknown message. |
|
255 |
T-PDU |
8.1.1 |