User Manual

Table Of Contents
SARA-R4 series-AT commands manual
UBX-17003787 - R16
7Network service
Page 70 of 401
Parameter Type Description
Allowed values:
SARA-R4 - 1, 3 (factory-programmed value). Since NB-IoT must support CP, if the
parameter is set to 0 or 2, the module returns an error result code.
<preferred_UE_opt> Number Indicates the UE's preference for CIoT EPS optimizations. Allowed values:
0: no preference
1 (factory-programmed value): preference for control plane CIoT EPS optimization
2: preference for user plane CIoT EPS optimization (it takes effect only if the
support for user plane CIoT is configured)
SARA-R4
The <preferred_UE_opt> parameter cannot be set in contrast to the
<supported_UE_opt> parameter. If an inconsistent configuration is provided,
then the module returns an error result code.
<supported_
Network_opt>
Number Indicates the network support for CIoT EPS optimizations. Allowed values:
0: no support
1: support for control plane CIoT EPS optimization
2: support for user plane CIoT EPS optimization
3: support for both control plane CIoT EPS optimization and user plane CIoT EPS
optimization
7.19.4Notes
SARA-R4
The <n> parameter is not stored in NVM.
If <preferred_UE_opt>=0 (no preference), the UE's preference is for control plane CIoT EPS optimization.
7.20NB-IoT band scan tuning +UDCONF=77
+UDCONF=77
Modules SARA-R410M-83B
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No NVM No - +CME Error
7.20.1Description
Configures the algorithm used for the scan when in NB-IoT RAT, allowing to optimize the scan procedure in
terms of time and power consumption.
7.20.2Syntax
Type Syntax Response Example
Set AT+UDCONF=77,<scan_scope> OK AT+UDCONF=77,1
OK
Read AT+UDCONF=77 +UDCONF: 77,<scan_scope>
OK
AT+UDCONF=77
+UDCONF: 77,2
OK
7.20.3Defined values
Parameter Type Description
<scan_scope> Number Configures the NB-IoT band scan SNR level restriction. The band scan is performed in
3 different levels:
"level 0": good SNR
"level 1": medium SNR
"level 2": poor SNR
At the power-on, the module performs a system scan where all the three levels of
scan are applicable. This is followed by a band scan, where there is an option to
restrict the scan to level 0, level 0 and 1, level 0, 1, and 2 or level 2 only:
0 (factory-programmed value): preference not specified. Platform's default
behavior performs all level 0, 1, and 2 scans