20.4 Subscriber Identity procedure
29.0023GPPMobile Application Part (MAP) specificationRelease 17TS
In the subscriber identity procedure the IMSI of the subscriber is retrieved from the HLR. The procedure is shown in figure 20.4/1.
1) Identity request
2) MAP_SEND_IMSI_req/ind
3) MAP_SEND_IMSI_rsp/cnf
4) Identity confirm
Figure 20.4/1: The subscriber identity procedure
20.4.1 Procedure in the VLR
The subscriber identity process in the VLR is shown in figure 20.4/2. The MAP process invokes macros not defined in this clause; the definitions of these macros can be found as follows:
Receive_Open_Cnf see clause 25.1.2;
Check_Confirmation see clause 25.2.2.
20.4.2 Procedure in the HLR
The subscriber identity process in the HLR is shown in figure 20.4/3. The MAP process invokes macros not defined in this clause; the definitions of these macros can be found as follows:
Receive_Open_Ind see clause 25.1.1;
Check_Indication see clause 25.2.1.
Figure 20.4/2: Process Send_IMSI_VLR
Figure 20.4/3: Process Send_IMSI_HLR