2.
LONG TERM EVOLUTION
The need for an evolved technology was felt during the implementation phase of
UMTS; a technology that would surpass the other wireless technologies by miles and
support the user needs for many more years to come. The rise in the bandwidth demand
and the user traffic predicted for the years to come meant that a shift in the mainstream
was needed to make that giant leap. Apart from that, it was also felt that the succeeding
technology would be compatible with legacy technologies as well for the smoother tran-
sition.
The evolution path from the 1
st
generation to the 3
rd
generation brought light upon the
limitations of different radio access technologies, their pros and cons and most im-
portantly their performance level in terms of throughput, coverage and capacity. With
the lessons learned from the previous generation technologies and questions arising on
abilities of future wireless technology, the answer that appeared to 3GPP was in the
form of LTE.
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