Is it possible something else on the device is occasionally sending data and reseting your window?
I would look in the log for the timestamp of the ConnectivityChanged broadcast and then check the radio log and see what's going on. I suspect there is an unsolicited data call list notification coming from the radio showing that the data call has gone away. Perhaps just before that there may be something explaining why. You may have to contact samsung if you're sure that other devices have longer connection times on the same carrier. On Fri, Dec 14, 2012 at 8:30 AM, Goncalo Oliveira <gonc...@minkan.net>wrote: > Hi Robert, > > Thanks for the reply. If I send a packet every 5/6 minutes the > connectivity is maintained yes. Only if connection is idle for longer than > that. The weird thing is that it's not an exact timer, even though the > average is very close. Sometimes it lasts 7 minutes, sometimes 8 or 9. I > even saw this happening with a 4 minute interval, though very rarely. On > the other device, I can most of the times maintain higher idle times. > I'll try to look at the logs more carefully to see if there's something > else. Is there anything in particular that I should look for? > > Cheers > > > On 14 December 2012 16:16, Robert Greenwalt <rgreenw...@google.com> wrote: > >> Android is not supposed to do this, though there is no guarantee of >> connectivity. It sounds like something samsung is doing, either >> accidentally or on purpose. >> >> If you send a packet every 6 minutes does that keep the device from >> pulsing connectivity? >> >> Can you take a bugreport - the radio log may have some indication of why >> it's happening. >> >> >> On Fri, Dec 14, 2012 at 2:24 AM, Goncalo Oliveira <gonc...@minkan.net>wrote: >> >>> Hi all, >>> >>> Seems that Android is dropping idle sockets when under a mobile network. >>> Usually, no socket is kept alive for more than 7 minutes of inactivity. I >>> am using a SIM card with a particular APN, that allows idle sockets for at >>> least 30 minutes - this was tested using another kind of device, also >>> communicating with GSM, and there are no drops, so problem isn't the SIM >>> card. >>> >>> After a few searches in the web, I tried a few approaches to work around >>> this, but until now, no success. I tried using a partial wake lock after >>> connecting, releasing only when disconnected - didn't work. Also tried >>> using only a 2G network, as some said that changing from network type could >>> impact on this - same outcome. >>> >>> After digging a bit more and by analyzing logcat, I watched that a >>> CONNECTIVITY_CHANGE >>> is sent after some idle time, disabling the data transfer availability >>> (active network is mobile, no connectivity) and another one is sent >>> enabling it again (active network is mobile, connectivity). This cuts off >>> all live socket connections. >>> >>> Investigating a little bit more, I also observed that this behavior is >>> not consistent through all Android versions, or maybe (even worse) through >>> different hardware. Connectivity break is occurring in a Galaxy Tab 7 >>> with Android 4.0.4. The same isn't occurring in an Unitech TB 100 with >>> Android 3.2. >>> >>> Does anyone know where I can get more information and/or I can work >>> around this? I would really like to avoid sending heartbeats every 6/7 >>> minutes. >>> >>> >>> Cheers >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Android Developers" group. >>> To post to this group, send email to android-developers@googlegroups.com >>> To unsubscribe from this group, send email to >>> android-developers+unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/android-developers?hl=en >> >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to android-developers@googlegroups.com >> To unsubscribe from this group, send email to >> android-developers+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > > > -- > Gonçalo Oliveira > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
