3G Location Updates and Battery being Drained

[makeev]

Dear Experts

We are facing complaints in our network, where customer's battery is being drained very quickly. Vendor being used is Huawie and ZTE.

Can you help with this,

a) What parameter should we retune and what are recommended Location Update parameter values ?

b) Any other action we can take to resolve this ?


Regards

[FrankPintor]

What values of T3212 and DrxCycleCoeff do you have?

[Boraa]

fast dormancy is activated ?

[makeev]

T3212 is set at 10 (60 mins), DrxCycleCoeff at default value.

I am not sure about fast dormancy feature, but it should be on default, how can i check it?

What would you suggest on retuning the above to two parameters

[Boraa]

first you have to check URA_PCH , if URA is activated , may be fast dormancy is activated .

[electron]

Hi,


Please check your paging intensity and DRX cycle. Most probably you will find some abnormal vlaue. Some time SGSN and MSC- server related timers also will cause battery draining as well.


Cheers

[FrankPintor]

T3212 is set at 10 (60 mins), DrxCycleCoeff at default value.

I am not sure about fast dormancy feature, but it should be on default, how can i check it?

What would you suggest on retuning the above to two parameters

60 mins is very short for the periodic location update timer (T3212), you can certainly set this to a period of several hours. A value in the range 4-8 hours is usual.

The default value for DRXCYCLELENCOEF in Huawei is 6, or 640ms, if you change it to 7 (1280ms) you should get up to 40% less current consumption in the mobile, and at 8 (2560ms) you should have 80% less. The trade-off is a longer time to respond to paging (i.e. set up a call).