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 |