Motorola V323I - Cell Phone - CDMA2000 1X User Manual download pdf (Page 13)

Telcom 2700/INFSCI 1071

HLR/VLR

• Home Location Register (HLR)

– Specialized database server contains billing info, service profile

and general location of a mobile user (one per service provider or

one per section of country)

– Visitor Location Register (VLR) similar to HLR contains location of

users and their service profile of all users in a metro type area

(one per MSC)

Telcom 2700/INFSCI 1071

WWANS - Satellites

• Over 3500 Satellites in use today - industry overall

revenues of $2.3 billion in 2004

• Telecommunications

– global telephone connections

– backbone for global networks

– connections for communication in remote places or

underdeveloped areas

– global mobile communications

• Other Applications

– weather

– radio and TV broadcast satellites

– Earth observation (climate change, agricultural, etc.)

– military: surveillance, imaging, intelligence, early warning

– Navigation and localization: aeronautic, nautical, etc., (e.g., GPS,

NavStar)

being replaced by fiber optics

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Motorola V323I - Cell Phone - CDMA2000 1X User Manual Page 13