Specifications

Cinterion
®
PLSx3 Hardware Interface Description
3.3 Power Saving
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t PLSx3_HID_v01.003 2021-03-12
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Now, a paging timing cycle consists of the actual fixed length paging plus a variable length
pause before the next paging. In the pauses between listening to paging messages, the module
resumes power saving, as shown in Figure 24.
Figure 24: Power saving and paging in GSM networks
The varying pauses explain the different potential for power saving. The longer the pause the
less power is consumed.
Generally, power saving depends on the module’s application scenario and may differ from the
above mentioned normal operation. The power saving interval may be shorter than 0.47 sec-
onds or longer than 2.12 seconds.
3.3.2 Power Saving while Attached to WCDMA Networks
The power saving possibilities while attached to a WCDMA network depend on the paging tim-
ing cycle of the base station.
During normal WCDMA operation, i.e., the module is connected to a WCDMA network, the
duration of a power saving period varies. It may be calculated using the following formula:
t = 2
DRX value
* 10 ms (WCDMA frame duration).
DRX (Discontinuous Reception) in WCDMA networks is a value between 6 and 9, thus result-
ing in power saving intervals between 0.64 and 5.12 seconds. The DRX value of the base sta-
tion is assigned by the WCDMA network operator.
Now, a paging timing cycle consists of the actual fixed length paging plus a variable length
pause before the next paging. In the pauses between listening to paging messages, the module
resumes power saving, as shown in Figure 25.
Figure 25: Power saving and paging in WCDMA networks
The varying pauses explain the different potential for power saving. The longer the pause the
less power is consumed.