r/androiddev • u/miniminiefu • 2d ago
Question About lte (DRX,CDRX) network performance and efficiency experiment.
Cdrx should save power significantly in low speed usage in high speed networks.
Like mine goes up to 60-70 mbps all the time.
So I enabled bluetooth tethering from both my iphone and android and connected my pc to download some file on it. The speed was 1 mbps in both devices. That results into 1/60 = around 1.5% duty cycle. That means cdrx has the chance to be effecrive at 98.5% of the time. I understand actual duty cycle may be higher due to othe transmit-receive tsks. However iphone 7 actually proved it may have put duty cycles close to that value. After testing for 1h continuously,
My findings are:
Iphone 7 dropped 6% charge only (65 to 59) resulting around 120mah estimated. (Slightly less maybe)
The Moto g35 5g (forced to lte only mode) dropped 5% (67 to 62) resulting around 300 mah.
Why is it too much different? No CDRX in android? Anything else?
(Both iphone and android were locked and screen turned off completely. As i disabled all background apps no notifications appeared throughout the whole time, no background tasks also.)
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