Mobility communication basic conception introduction

GSM area definition

In every GSM network area there are PLMN,MSC area , Location area and Cell area.

WCDMA  area defination

Every WCDMA network area there are PLMN, MSC area , Location area, Service area, Cell area.
IMSI number

 To add IMSI number are : MCC + NMSI
while NMSI = MNC + MSIN

MCC：Mobile Country Code

MNC：Mobile Network Code

MSIN：Mobile Station Identification Number

NMSI：National Mobile Station Identity

IMSI number

-IMSI number :

--IMSI: International Mobile Subscriber Identity  

--IMSI number is a unique identifier allocated to each mobile subscriber in a GSM and UMTS network

--It’s code type is E.212

--IMSI can be saved in SIM card, HLR and VLR, and be transferred through MAP interface and wireless interface

--IMSI has at most 15 digits(0-9), such as 456182350000168

TMSI number

-TMSI number :

-TMSI: Temporary Mobile Subscriber Identity

-In order to ensure subscriber identity confidentiality the VLR (Visitor Location Register) and SGSN (Serving GPRS Support Node) may allocate TMSI to visiting mobile subscribers

IMEI number

 

 To add new IMEI = TAC + FAC + SNR + Spare

TAC：Type Approval Code

FAC：Final Assembly Code

SNR：Serial Number

spare：standby bit

Example: 490547403767335

MSISDN number

 To add new MSISDN = CC + ISDN
that ISDN = NDC + SN

 

CC：   Country Code, China country code is86

NDC ：National Destination Code

SN：   Subscriber Number

-MSISDN number :

--Mobile Station International ISDN Number

--The MSISDN Number is the standard international telephone number used to identify a given subscriber

--It’s code type is E.164

--MSISDN number can be saved in HLR and VLR, and can be transferred in MAP interface 

Device number  

 

Device number seperate into two parts ,it has the same number : MSC number and HLR number.
 To  create new MSC number and HLR number :
 MSC number = CC + NDC +LSP
   LSP : Locally significant Part

HLR number = CC + NDC + H0 H1 H2 H3 0000

MSC/VLR Number and HLR Number

-MSC/VLR number :

--It’s code type is E.164

-HLR number

--It’s code type is E.164

--It’s structure is CC+NDC+H0H1H2H3+0000

MSRN/HON

-MSRN/HON number :

-They are used to address the target MSC

-They are generated by VLR temporary, when a MS act as a called party, or the MS is being in the handover procedure

LAI

-LAC:A  Location Area is a number of cells (defined by the mobile operator) throughout which a GSM / UMTS mobile will be paged

-LAI: Location Area Identity

 

MCC：Mobile Country Code

MNC：Mobile Network Code

LAC: Location Area Code

SAI

-SA: Service area

--A Service Area consists of one or more cells within a given LA (Location Area) and may be used to assist in the delivery of location based services

-SAI: Service Area Identity

 

MCC：Mobile Country Code

MNC：Mobile Network Code

LAC: Location Area Code

SAC: Service Area Code 

 

CGI

   CGI is performed by MCC + MNC + LAC + CI

CGI: Cell Global Identity 

 

 

MCC：Mobile Country Code

MNC：Mobile Network Code

LAC: Location Area Code

CI:  Cell Identifier