VLR GSM, . GSM , VLR GSM, .
, GPRS (SGSN) MSC/VLR, " ". " D900/D1800", " PLMN GPRS ".
.
:
(IMSI)
(LMSI)
(MSRN)
(TMSI) (LAI)
GSM . VLR TMSI, IMSI, VLR .
MSC MS MSC, GSM VLR. GSM IMSI TMSI.
:
MS MSC MS . GSM ( VLR) HLR GSM VLR.
HLR, GSM VLR. GSM VLR MML.
, GSM VLR. VLR VLR ( (RAND), (SRES) (Kc).
VLR . VLR C HLR, VLR.
VLR MS . VLR (SRES), MS, , . , . , .