Wireless communication systems have existed for many years, yet as increasingly
complex systems are built, we encounter problems that were never dreamed
of by early wireless pioneers. Modern cellular systems use base stations
which cover a specific geographical region, called a cell. Problems
arise in deciding when to switch a user from one cell to another, in dealing
with interference between cells, and in tracking the user. Even with these
difficult problems, wireless communication has a strong, and perhaps lucrative,
future. Attributes such as the freedom to communicate and move,
and the ability to bring communications to remote locations without cable
make this technology an indispensible part of our society. All video flies in SMIL document
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