20.3 Subscriber Identity procedure

29.1203GPPMobile Application Part (MAP) specification for Gateway Location Register (GLR)Release 17TS

In the subscriber identity procedure the IMSI of the subscriber is retrieved from the HLR. The procedure is shown in figure 20.3/1.

+—–+ +——+ +——+ +——+
¦ OMC ¦ ¦ VLR ¦ ¦ GLR ¦ ¦ HLR ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
+—–+ +——+ +——+ +——+
¦ 1.¦ ¦ ¦
+ – – – – >¦ 2.¦ 2.¦
¦ +————->¦————>¦
¦ ¦ 3. ¦ 3. ¦
¦ 4. +<————-+<————¦
+< – – – – ¦ ¦ ¦
¦ ¦ ¦ ¦

1) Identity request.

2) MAP_SEND_IMSI.

3) MAP_SEND_IMSI_ACK.

4) Identity confirm.

Figure 20.3/1: The subscriber identity procedure

20.3.1 Subscriber identity procedure in the GLR

The subscriber identity procedure in the GLR is shown in figure 20.3/2.

Figure 20.3/2 (Sheet 1 of 2): Process Send_IMSI_GLR

Figure 20.3/2 (Sheet 2 of 2): Process Send_IMSI_GLR