6.0 ids in gsm
DESCRIPTION
6.0 IDs in GSMTRANSCRIPT
GSM ELEMENTS COMMUNICATION
MSISDN
MSISDN-to-IMSI-to-MSC address
MSISDN
MSRN
GMSC
PSTN
MSC/VLR
HLR
IMSI
MSRN
IMSI-to-MSRN
MSRN
MSISDN
• Mobile Station ISDN Number
• uniquely identifies a mobile telephone subscription (at most 15 digits)
• Number dialed when calling a mobile subscriber; actual telephone number
CC
COUNTRY
CODE
NDC
NATIONAL
DESTINATION
CODE
SN
SUBSCRIBER
NUMBER
NATIONAL NUMBER
INTERNATIONAL MS ISDN NUMBER
+ 63 917 000-0000
IMSI• International Mobile Subscriber Identity
• unique identity allocated to each subscriber (at most 15 digits) which facilitates correct subscriber information/identification
MCC
3 digits
MOBILE
COUNTRY
CODE
MNC
2-3 digits
MOBILE
NETWORK
CODE
MSIN
MS
IDENTIFICATION
NUMBER
NATIONAL MSI
IMSI
UNIQUE PER SIM
TMSI
• TEMPORARY MOBILE SUBSCRIBER IDENTITY
• half the size of IMSI
• used to protect the subscriber’s identity in the air interface
• it has a local significance, only within the MSC/VLR area
IMEI
• International Mobile Equipment Identity
• used to uniquely identify the mobile equipment
TAC
6 digits
TYPE
APPROVAL
CODE
FAC
2 digits
FINAL
ASSEMBLY
CODE
SNR
6 digits
SERIAL
NUMBER
INTERNATIONAL MS ISDN NUMBER
Spare
1 digit
SPARE
always = 0
MSRN
• Mobile Station Roaming Number
• used by the HLR to identify in what MSC/VLR service area the subscriber is currently located
CC
SPARE
Always = 0
NDC
NATIONAL
DESTINATION
CODE
SN
SUBSCRIBER
NUMBER
MSRN
0 917 000-0000
LAI
• Location Area Identity
• two purpose:– paging - informs the MSC w/c LA the MS is currently in
– used also for location updating
MCC
3 digits
MOBILE
COUNTRY
CODE
MNC
2-3 digits
MOBILE
NETWORK
CODE
LAC
16 bits
LOCATION
AREA
CODE
LAI
CGI• Cell Global Identity
• used for cell identification in the location area
MCC
3 digits
MOBILE
COUNTRY
CODE
MNC
2-3 digits
MOBILE
NETWORK
CODE
LAC
16 bits
LOCATION
AREA
CODE
LAI
CI
16 bits
CELL
IDENTITY
CGI
BSIC
• Base Station Identity Code
• makes it possible for the MS to distinguish different neighboring base stations
NCC
3 bits
NETWORK
COLOR
CODE
BSIC
BCC
3 bits
BASE STATION
COLOR
CODE
TRAFFIC CASE
HLR
BSCMSC/
VLRGMSC
PSTN
1
2
3
4
5 5
6 7
8
8
9
MSISDN
MSISDN
IMSI
MSC/VLR AREA
IMSI
MSRN
VLR:
IMSI - MSRN
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