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Answer Posted / mani
Mobility Management is one of the major functions of a GSM
or a UMTS network that allows mobile phones to work. The aim
of mobility management is to track where the subscribers
are, so that calls, SMS and other mobile phone services can
be delivered to them.
GSM (Global System for Mobile communications: originally
from Groupe Spécial Mobile) is the most popular standard for
mobile phones in the world. Its promoter, the GSM
Association, estimates that 82% of the global mobile market
uses the standard. GSM is used by over 3 billion people
across more than 212 countries and territories.Its ubiquity
makes international roaming very common between mobile phone
operators, enabling subscribers to use their phones in many
parts of the world. GSM differs from its predecessors in
that both signalling and speech channels are digital, and
thus is considered a second generation (2G) mobile phone
system. This has also meant that data communication was easy
to build into the system.
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