Integration Manual

LISA-U2 series - System Integration Manual
UBX-13001118 - R25 Features description Page 148 of 182
3.8 Dual stack IPv4/IPv6
☞ Not supported by the "01", "x2", "63" and "68" product versions.
LISA-U2 modules support both Internet Protocol version 4 and Internet Protocol version 6.
For more details about dual stack IPv4/IPv6, see the u-blox AT Commands Manual [2].
3.9 AssistNow clients and GNSS integration
For customers using u-blox GNSS receivers, the LISA-U2 cellular modules feature embedded
AssistNow clients. AssistNow A-GPS provides better GNSS performance and a faster Time-To-First-
Fix. The clients can be enabled and disabled with an AT command (see the u-blox AT Commands
Manual [2]).
LISA-U2 modules act as a stand-alone AssistNow client, making AssistNow available with no
additional requirements for resources or software integration on an external host micro controller.
Full access to u-blox GNSS receivers is available via the LISA-U2 series, through a dedicated DDC (I
2
C)
interface, while the available GPIOs can handle the positioning chipset / module power-on/off. This
means that GSM/WCDMA and GNSS can be controlled through a single serial port from any host
processor.
3.10 Hybrid positioning and CellLocate
®
Although GNSS is a widespread technology, its reliance on the visibility of extremely weak GNSS
satellite signals means that positioning is not always possible. Especially difficult environments for
GNSS are indoors, in enclosed or underground parking garages, as well as in urban canyons where
GNSS signals are blocked or jammed by multipath interference. The situation can be improved by
augmenting GNSS receiver data with cellular network information to provide positioning information
even when GNSS reception is degraded or absent. This additional information can benefit numerous
applications.
3.10.1 Positioning through cellular information: CellLocate
®
u-blox CellLocate
®
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
®
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
®
database. The u-blox cellular
module 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).
☞ Normal scan is only possible in 2G mode.