LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
Features description
Page 83 of 103
information to provide positioning information even when GNSS reception is degraded or absent. This additional
information can benefit numerous applications.
3.7.1
Positioning through cellular information: CellLocate
TM
u-blox CellLocate
TM
enables the estimation of device position based on the parameters of the mobile network
cells visible to the specific device. To estimate its position the u-blox cellular module sends the CellLocate
TM
server
the parameters of network cells visible to it using a UDP connection. In return the server provides the estimated
position based on the CellLocate
TM
database. For AT command details, see u-blox C2 series AT Commands
Manual [3].
The CellLocate
TM
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
TM
server when observing a specific cell (the As in
Figure 44 represent the position of the devices which observed the same cell A)
Figure 44: Devices represented by “A” notation observe the same Cell A and report their position to CellLocate
TM
server
2.
CellLocate
TM
server defines the area of Cell A visibility
Figure 45: CellLocate
TM
server defines the area where devices are able to observe Cell A
3.
If a new device reports the observation of Cell A CellLocate
TM
is able to provide the estimated position
from the area of visibility
