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Introduction to WCDMA: Physical Channels, Logical Channels, Network, and Operation

Device Addressing

WCDMA mobile terminals are uniquely identified by the mobile identification number through the use of mobile station ISDN (MSISDN), of International Mobile Subscriber Identity (IMSI), International Mobile Equipment Identifier (IMEI), and a temporary mobile station identity (TMSI). In addition may be assigned temporary IP addresses as required.

Mobile Station ISDN (MSISDN)

The mobile station ISDN is the phone number assigned to mobile ptelephones. This number is compatible with the E.164 international public telephone numbering plan.

International Mobile Subscriber Identity (IMSI)

The international mobile subscriber identity is an identification number that is assigned by a mobile system operator to uniquely identify a mobile telephone.

International Mobile Equipment Identifier (IMEI)

An International Mobile Equipment Identifier (IMEI) is an electronic serial number that is contained in a GSM mobile radio. The IMEI is composed of 14 digits. six digits are used for the type approval code (TAC), two digits are used for the final assembly code (FAC), six digits are used for the serial number and two digits are used for the software version number.

Temporary Mobile Station Identity (TMSI)

A temporary mobile station identity (TMSI) is a number that is used to temporarily identify a mobile device that is operating in a local system. A TMSI is typically assigned to a mobile device by the system during its' initial registration. The TMSI is used instead of the International Mobile Subscriber Identity (IMSI) or the mobile directory number (MDN). TMSIs may be used to provide increased privacy (keeping the telephone number private) and...

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Category: Automatic Identification Systems (AIS)
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