SARA-G450 - System integration manual
UBX-18046432 - R08
System description
Page 52 of 143
C1-Public
Positioning through cellular information: CellLocate®
The u-blox CellLocate® feature enables device position estimation based on the parameters of the
mobile network cells that are visible to the specific device. To estimate its position, the module sends
the CellLocate® server the parameters of network cells that are visible to it using a UDP connection.
In return, the server provides the estimated position based on the CellLocate® database. SARA-G450
modules can either send the parameters of the visible home network cells only (normal scan) or the
parameters of all surrounding cells of all mobile operators (deep scan).
The CellLocate® database is compiled from the position of devices which observed, in the past, a
specific cell or set of cells (historical observations) as follows:
1.
Several devices reported their position to the CellLocate® server when observing a specific cell
(the “A”s in the picture represent the position of the devices which observed the same cell A).
2.
CellLocate® server defines the area of cell A visibility.
3.
If a new device reports the observation of cell A, then CellLocate® is able to provide the estimated
position from the area of visibility.
