When you activate the wifi connection on a mobile device, you are activating a second radio - so it stands to reason that battery life will suffer. Additional battery killers are GPS and auto-updates for installed APs. The cell companies have learned that the closer a device is to a transmitter, the lower the power requirements for the device. This is a "selling point" for DAS installations - Spend a couple hundred thousand on more antennae and your users won't have to charge their battery at noon. (OK, that might be a loose paraphrase) ....
On Tue, Jul 3, 2012 at 5:07 PM, Hurt,Trenton W. <[email protected]>wrote: > I have started getting complaints from users regarding battery life on > android devices when connected to our campus wifi. The issue is being seen > when you install a type of bandwidth meter app on the device. The one I > use is android status and I look at the network section to see the Rx and > Tx statistics. Once connected to wireless the device still receives bursts > of traffic, at least according to the app on the device. We are cisco wifi > shop and I’m running 7.2mr1 code on the wlc’s. Has anyone else heard or > seen this issue? **** > > ** ** > > ** ** > > I found this post > http://forum.xda-developers.com/showthread.php?t=1738171 which states…** > ** > > ** ** > > *This is simply because your wifi antenna still "hears" the data going > through the wireless network on which you are connecter. Even if your phone > doesn't asks for any data at the moment the traffic there is on the network > will still be counted by the wifi chip on your phone. > > It will be the same on any public network or if you have another phone or > a computer connecter on the same wireless router and generating traffic.* > > ** ** > > ** ** > > I have tried to increase the DTIM setting on one of the wlans and it > didn’t help. Any suggestions?**** > > ** ** > > Thanks**** > > Trent**** > > ** ** > > ** ** > > ** ** > > Trenton Hurt, CWNA, CCNP(W), CCNA(W), CCNA(V), CCNA(R/S) > Wireless Network Administrator > University of Louisville > Phone (502) 852-1513 > FAX (502) 852-1424 > [image: Description: Description: > C:\Users\twhurt01\AppData\Local\Temp\XPgrpwise\IMAGE_19.BMP]**** > > ** ** > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > -- Ron Walczak PMP, RCDD, CWNA/CWSP Walczak Technology Consultants, Inc (724) 865-2740 "Not to speak is to speak. Not to act is to act." - Dietrich Bonhoeffer * ** * "The great aim of education is not knowledge but action." *- Herbert Spencer * * **Anyone can count the seeds in an apple; but only God can count the apples in a seed*. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
