Specifications

Cinterion
®
TX62-W/TX82-W Hardware Interface Description
3.3 Power Saving
120
t TX62-W_TX62-W-x_TX82-W-x_HID_v01.200d 2022-09-08
Public / Preliminary
Page 92 of 170
3.3.1.2 SUSPEND Mode
In contrast to SLEEP mode, SUSPEND mode is a module’s low power mode with almost all
components switched off - except for the internal RTC and interrupt triggered wake up mech-
anisms. The module stays registered to the network, and the RRC connection is released. The
module is in its lowest power consumption state.
Once the SUSPEND mode is enabled via AT command (see MEopMode/PowerMgmt/Sus-
pend”), and the appropriate SUSPEND mode indicators are enabled (see PSM and possible
eDRX settings need to be negotiated with the network. eDRX and PSM network settings are
described in more detail in Section 3.3.3.2 and Section 3.3.3.3.
If the PSM settings are agreed upon with the network, TX62/TX82 is able to enter SUSPEND
mode, and the following AT^SIND URC is generated:
+CIEV: “suspendAvailable”,1
In addition, if there is no further communication with the network, and the module is ready to
enter SUSPEND mode, the following AT^SIND URC is generated:
+CIEV: "suspendReady",1
Also, the SUSPEND_MON signal will turn low as soon as the module enters SUSPEND mode
(see Section 2.1.11.5).
Figure 43 shows the handshake between external application, module and the network for en-
tering SUSPEND mode or possibly SLEEP mode depending on configuration and network re-
sponse.
Figure 43: Handshake for entering the module’s SUSPEND mode
External
Application
Module Network
Enable SUSPEND mode
(AT^SCFG “MEopMode/
PowerMgmt/Suspend”)
Ready for SUSPEND mode
(+CIEV: “suspendReady“,1)
Interfaces inactive
SUSPEND or optionally SLEEP
mode reached
Request PSM timers
(AT+CPSMS)
Request PSM and optional eDRX
with desired timers
Network confirms PSM and/or
optional eDRX and assigns timers
SUSPEND mode possible
(+CIEV: “suspendAvailable“ ,1)
Optional: Request eDRX timers
(AT+CEDRXS/AT+SEDRXS)