GPS-baserad virtuell geografisk inhägnad för mobil enhet
DatavetenskapComputer science - generalComputer science - software engineeringComputer science - computersystemsAndroidAlgoritmMobil enhetPositioneringPositionLarmAlgorithmMobile unitPositioningAlarm
The aim of this paper is to find an algorithm to establish and maintain a
virtual
enclosure around a mobile unit. The area may take any form and should be
scalable
up to and including national borders. The enclosure is managed on the mobile
unit.
The target system is Android.
Smartphones, tablets and more recently, cameras is examples of mobile units. A
modern mobile unit is part of a computer network. It is designed to be
connected
all the time. A mobile unit have the capability to handle large volumes of
data,
data that might be both sensitive and possess an economic value. Management of
mobile units is vital to protect the data and insure security for the entire
network.
A mobile unit is a resource in the network. Each resource is defined by a set
of
parameters. One parameter that make a mobile unit special is the lack of
physical
boundaries to world. Typically, the first step in security is access control to
resources. Therefore, the lack of physical access control has to be replaced by
other means such as tracking the location of the mobile unit.
In this paper I have studied the possibility of creating a virtual fence around
the
mobile unit. The mobile unit is free to move within the area enclosed by the
virtual fence. The mobile unit alert all concerned parties if it crossed the
fence
and thus leave the enclosed area. The aim was to find a practical algorithm to
establish and maintain a virtual fence around the mobile device.
A grid-based algorithm was selected because it can handle small to very large
areas. All data are collected in a table which makes the algorithm fast,
regardless
the size of the area. A grid enables management of multiple enclosures and
relationships between them. Deeper analysis revealed that the mobile device is
not
able to position sufficiently often and accurately for the grid-based algorithm
to
handle small areas. A complementary method is needed for minimizing the need
for
positioning. To manage properties, such as geographical information, the
selected
algorithm is deemed to be well suited.