SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
14 System features
Page 158 of 307
14.8 Power Saving Mode Assigned UCPSMS
+UCPSMS
SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
Yes
No
No
-
14.8.1 Description
Reads the UEs power saving mode (PSM) parameters assigned by the network. The command returns the
state of PSM on the UE, as well as:
• the requested extended periodic RAU value in GERAN/UTRAN
• the requested GPRS READY timer value in GERAN/UTRAN
• the requested extended periodic TAU value in E-UTRAN
• the requested Active Time value
To be noticed that
• Power saving mode enabled (+UCPSMS: 1): everything on the device is powered down except for the Real
Time Clock (RTC) after the expiry of T3324 (Active Time). It will stay powered down until the expiry of T3412
(Extended TAU Timer) or if the Power On line is toggled.
• Power saving mode disabled (+UCPSMS: 0): the device will not enter the Power Save Mode (PSM).
14.8.2 Syntax
Type
Syntax
Response
Example
Read
AT+UCPSMS?
+UCPSMS: <mode>,[<Assigned_
Periodic_RAU>],[<Assigned_GPRS_
READY_timer>],[<Assigned_
Periodic_TAU>],[<Assigned_Active_
Time>]
OK
+UCPSMS: 1,,,"01000011","01000011"
OK
14.8.3 Defined values
Parameter
Type
Description
<mode>
Number
Indication to disable or enable the use of PSM in the UE. Allowed values:
•
0: use of PSM disabled
•
1: use of PSM enabled
<Assigned_Periodic_
RAU>
String
Assigned extended periodic RAU (T3312) value allocated to the GERAN/UTRAN, one
byte in an 8 bit format. For the coding and the value range, see the GPRS Timer 3 IE in
3GPP TS 24.008 [
<Assigned_GPRS_
READY_timer>
String
Assigned GPRS READY timer (T3314) value allocated to the UE in GERAN/UTRAN,
one byte in an 8 bit format. For the coding and the value range, see the GPRS Timer 3
IE in 3GPP TS 24.008 [
]
<Assigned_Periodic_
TAU>
String
One byte in an 8 bit format. Assigned extended periodic TAU value (T3412) allocated
to the device in E-UTRAN. The Assigned extended periodic TAU value is coded as one
byte (octet 3) of the GPRS Timer 3 information element coded as bit format (e.g. "0
1000111" equals 70 hours). For the coding and the value range, see the GPRS Timer 3
IE in 3GPP TS 24.008 Table 10.5.163a/3GPP TS 24.008 [
].
<Assigned_Active_
Time>
String
One byte in an 8 bit format. Assigned Active Time value (T3324) allocated to the UE.
The Assigned Active Time value is coded as one byte (octet 3) of the GPRS Timer
2 information element coded as bit format (e.g. "00100100" equals 4 minutes). For
the coding and the value range, see the GPRS Timer 2 IE in 3GPP TS 24.008 Table 10
.5.163/3GPP TS 24.008 [
].
14.8.4 Notes
SARA-R4 / SARA-N4
• <Assigned_Periodic_RAU> and <Assigned_GPRS_READY_timer> are not supported.
