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 <[email protected]>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 [email protected] > To unsubscribe from this group, send email to > [email protected] > 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
