Default Fast Dormancy Setting ATT GS2
- Thread starter sklinger
- Start date
I too have noticed that changing the setting and rebooting appears to have an effect on data speeds. But it always seemed kinda unpredictable to me. Sometimes I'd notice an average 1-2 mbit boost, but other times it would crawl at basically bog-standard UMTS speeds.
Also, at least where I live you, have to run speedtests at like 3-4 am to get even mildly consistent results.
Did a little research and located this interesting bit of info from an AT&T document pertaining to "network ready" emerging device guidelines...(things AT&T requires for any device specifically built to run on their network)
Fast Dormancy is a concept that applies to 3G technology that AT&T employs
which, if incorrectly designed, could generate increased signaling traffic on the
network and add latency to the user.
Fast Dormancy allows a device to quickly move from active state to an idle state.
While there may be battery saving benefits, a well designed fast dormancy
algorithm should consider applications that are active, display status and user
action before initiating fast dormancy.
Fast Dormancy should only be used for PDP Context serving non-real-time
background applications for which activity is not real time user interactive,
closely spaced. Such applications include e-mail, visual voicemail, etc. Additional
information is provided in the AT&T requirements document, 13340.
...what I gather from this is that; yes, it seems they do support FD.
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3It's better to resurrect an old thread that already discusses this topic than it is to create a whole new one. XDA rule #1: "search before posting". If a thread already exists that deals with what you want, DO NOT create a new one.
And to the recent poster:
I'm not sure anyone has done "scientific" testing to see whether or not "fast dormancy" helps. Based on the available generic GSM literature on the matter, it would seem like a good idea. Faster data call spin-ups, and less battery use. However, AT&T notoriously doesn't follow the GSM spec fully, and often times picks and chooses what to deploy on their network.
I suppose the best way to test is to run a whole bunch of speed tests with and without FD turned on. And to live a week with it on, then a week with it off, and compare average battery life. And if you can get another 15-20 people to do the same, then we do some statistical analysis on the results, you might actually find out whether to enable it or not.
Short of that, the rest is heresay and wildly subjective opinions. Any given individual's usage patterns may vary so wildly, that without looking on aggregate (and with correct analysis), it's almost impossible to tell whether or not specific "insert-preference-here" actually has a positive effect or not. It is worth mentioning that fast dormancy does appear to be disabled by default on AT&T based ROMs for the GS2. Of course, such a setting might have been over-looked, or possibly even disabled despite potentially helping performance/battery on our phones. Who knows. Unless you have a friend who works as a network engineer at AT&T, we might ultimately never get an answer on this... :-/2111from what I understand that the Apple's IOS 4.2 has built in FD that prolong the life of the battery on AT&T's network.
Engaget Article on IOS 4.2 and FD
http://www.research.att.com/article...1_03/201102_Energy_efficient?fbid=gN0JMJ3DvMk
But as to WHICH type of fast dormancy the phone support is beyond my knowledge
