Typical GSM current profile

Question

I'm working with GSM modem and I'm wondering if anyone has come across any sort of measured or typical GSM current profiles for various actions such as:

Connecting to base station
Sending a SMS
Voice call
During an active data connection

I know the general trend of what the current consumption should look like when it is transmitting based upon frame rate and slot-time, what I'm looking for is more coarse view. For example when sending a SMS message it transmits for N number of slots.

score 2 · Answer 1 · answered Jun 02 '12 at 13:07

2

I used some generic modules, so here are some values to work with:

voice call: 250 - 300 mA (unactive unused bursts: 20 - 50 mA)
GPRS (2Tx, 3Rx slots): 340 - 410 mA

This assumes having a matched antenna. The current consumption itself depends on the transmitted power and is thus dependend on the network. If you have a highly unmatched antenna, a voice call can draw up to 2500 mA.

answered Jun 02 '12 at 13:07

suha

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What chipset were you using? – Kortuk Jun 02 '12 at 16:23
@Kortuk [LEON-G200](http://www.u-blox.com/de/wireless-modules/gsm-gprs-modules/leon-gsm-module-family.html) – suha Jun 02 '12 at 18:10
1

I meant that it is probably worth placing that in the answer. Did the datasheet for the chipset not give you this information? – Kortuk Jun 03 '12 at 10:19
@Kortuk It did in some part. – suha Jun 03 '12 at 11:53

score 0 · Answer 2 · answered Dec 22 '12 at 14:22

Siemens, some time ago, made many GSM modules widely by machine-to-machine systems, like TC25, TC35, TC65, with very detailed technical data manuals. Some has good graphs showing the current rise time and peak duration, etc.

Try search, like http://www.op5.com/manuals/extras/op5_TC65_GSM_module_manual.pdf

Typical GSM current profile

2 Answers2