Location Based Service
A location-based service (or
LBS) in a cellular telephone network is a
service provided to the subscriber based on her
current geographic location. This position can
be known by user entry or a GPS receiver that
she carries with her, but most often the term
implies the use of a function built into the
cell network that uses triangulation between the
known geographic coordinates of the base
stations through which the communication takes
place. One implication is that knowledge of the
coordinates is owned and controlled by the
network operator, and not by the end user
herself.
Examples of location based services might
include finding the closest Italian restaurant.
The ability of the restaurant to send an
invitation to bypassers has also been mentioned,
even though this might be regarded as
unsolicited commercial email or spamming.
These services were launched in the late 1990s,
and the development in this area seems (as of
2004) to be driven more by technical ability
than by user need.
Linked technology also allows someone to
identify the location of a mobile phone user to
within a few yards or metres. This is especially
useful when dialing an emergency telephone
number, such as enhanced 9-1-1 in North America,
so that the operator can dispatch emergency
police or firefighting services to the correct
location. In the U.S. the FCC requires all new
phones have this capability, and that the user
be able to easily turn it off for all
non-emergency uses.
External Links
-
UK Verilocation service (http://www.verilocation.com/HowItWorks.aspx)
-
CellSpotting.com, A Global cell id based
service (http://www.cellspotting.com)
-
uLocate.com, US service thar uses GPS in
phones (http://www.ulocate.com)
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