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