| dc.description.abstract | ̶Whilst access to location based information has been mostly possible in the
outdoor arena through the use of GPS, the provision of accurate positioning estimations and
broad coverage in the indoor environment has proven somewhat problematic to deliver.
Considering more time is spent in the indoor environment, the requirement for a solution is
obvious. The topography of an indoor location with its many walls, doors, pillars, ceilings
and floors etc. muffling the signals to \from mobile devices and their tracking devices, is one
of the many barriers to implementation. Moreover the cha racteristically noisy behaviour of
wireless devices such as Bluetooth headsets, cordless phones and microwaves can cause
interference as they all operate in the same band as Wi -Fi devices. The limited range of
tracking devices such as Wireless Access Point s (AP), and the restrictions surrounding their
positioning within a buildings’ infrastructure further exacerbate this issue, these difficulties
provide a fertile research area at present.
The genesis for this research is the inability of an indoor location based system (LBS) to
locate devices beyond the range of the fixed tracking devices. The hypothesis advocates a
solution that extends the range of Indoor LBS using Mobile Devices at the extremities of
Cells that have a priori knowledge of their location, and utilizing these devices to ascertain
the location of devices beyond the range of the fixed tracking device. This results in a
cooperative localisation technique where participating devices come together to aid in the
determination of location of device s which otherwise would be out of scope. | en |
