At this moment, 4G deployments are planned all over the
world and billions of potential users await to gain access to
high-speed and seamless communications. LTE technology,
with its latest release of LTE Advanced, is the best candidate
to be elected as 4G standard. Core and radio-access network
are based on flat all-ip networking, making interoperability
extremely easy and fast, but increasing the requirements of
higher security capabilities. Being supported by most of the
mobile operators providers and manufacturers, a victory is
envisaged into the ITU competition to choose it as standard
for IMT-Advanced.