SARA-R4 series - Data sheet

UBX-16024152 - R18

Functional description

Page 10 of 43

Feature

Description

Full access to u-blox positioning chips and modules is available through DDC (I2C) interface.

This means that from any host processor, a single serial port can control the SARA-R4 series

cellular module and the u-blox positioning chip or module.

Enables the estimation of device position based on the parameters of the mobile network cells

visible to the specific device based on the CellLocate® database. CellLocate® is available via a set

of AT commands for CellLocate® service configuration and position request.

Power Saving Mode (PSM) The Power Saving Mode (PSM) feature, defined in 3GPP Rel.13, allows further reduction of the

module current consumption maximizing the amount of time a device can remain in PSM low

power deep sleep mode during periods of data inactivity. It can be activated and configured by the

+CPSMS AT command.

Extended Idle mode DRX, based on 3GPP Rel.13, reduces the amount of signaling overhead

decreasing the frequency of scheduled measurements and/or transmissions performed by the

module in idle mode. This in turn leads to a reduction in the module power consumption while

maintaining a perpetual connection with the base station.

Coverage Enhancements

Mode A

Coverage Enhancements (CE) Mode A, introduced in 3GPP Rel.13, is used to improve cell signal

penetration.

Coverage Enhancements

Coverage Enhancements (CE) Mode B, introduced in 3GPP Rel.13, is used to further improve cell

signal penetration.

Release Assistance

Indicator 18

The 3GPP Release Assistance feature allows the module to request for the RRC connection to be

dropped as soon as the message has been received by the network. This feature allows a reduction

in the module power consumption.

LWM2M with dynamically

loaded objects 18

Method allowing dynamically loaded run time objects for customers to configure u-blox modules to

define necessary objects, create instances of those objects as appropriate, manage module

LWM2M protocol stack to interact with the LWM2M server.

Table 3: Some of the main features supported by SARA-R4 series modules

u-blox is unable to track the SIM used or the specific device.