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3G
cellular networks should be structured to maximize
network capacity. Their architecture should also
offer multimedia services anywhere.
A UMTS network will be planned to use a hierarchical
cell structure.
Pico cells (for high data rate services, such as
laptop networking or multimedia conferencing) would
be deployed for private, indoor services in the
unpaired frequency band.
Canyon-like shaped micro cells (to fit the topography
of a city street hidden by buildings) would be used
for outdoor coverage, where high capacity is required
and larger cells cannot cover.
Hexagonal shaped, wide coverage, macro cells (based
on the existing second-generation mobile network)
constitute the core of the network.
Finally, high capacity global wireless communication
will come from satellite cells. In each cell, the
UMTS standard lets the operator choose FDD or TDD
methods, depending on the traffic. |
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Current mobile
standards were generally developed over all handset,
radio communications and core network levels. With
3G there is one standardization process for the
radio network
and another for the core network. The mobile radio
network will connect to the core network and provide
the wideband interface for users. The core network
will also be connected to other wired and mobile
networks, to provide global telecoms networks.
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UMTS phones will
keep the high security and customization features
of the successful  Subscriber
Identity Module (SIM) in GSM for its UMTS SIM. Device
constructors will need to create larger built-in
memory SIM to match the high capacity of communication
that UMTS. This will provide for graphic and file
stock data.
The increased complexity of data transactions and
volume of access to the 3G network must inevitably
lead to  increasing
security risks. This market sector must have major
growth prospects in the new communication age. Unless
secure transactions can be assured the massive growth
prospects of m-commerce and data transfer will just
not happen. |
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