Re: [android-developers] Sprint 4G(WIMAX) tcp connection problem

We have to consider multiple platforms(iOS, Android, Blackberry). On iOS, push notification

is not an option for our application.  If use GCM, we need  another extra special design especially for android.

On Mon, Apr 15, 2013 at 11:23 PM, Robert Greenwalt <rgreenwalt@google.com> wrote:

Could you use GCM instead of rolling your own long-lived connection with independent keepalive?  It'll be better for the users battery and better for the carriers network and you won't have to figure out issues like these.

On Sat, Apr 13, 2013 at 3:35 AM, Long <long.pu@gmail.com> wrote:

Hi Developers, 

    I have an background service which connects my server with a TCP connection.

    My background service sends a ping packet to my server every 4minutes to keep the socket alive.

   The problem is that the device can not get the packet from the server after a short time(3 seconds from my test) after the ping is sent. 

   This app works fine on other networks(AT&T, verizon). 

 

   The strange thing is that if I force the device to connect to 3G(EVDO revision A), it works fine.

 

   It seems to me that, on Sprint 4G network, when an app sends a packet through a tcp socket, and then the socket is idle for

several seconds, then the app will never be able to receive packets from this socket.

   

   I don't think it's related to the 4G signal, since this issue can be reproduced every time.

   Any suggestions?

 

   

  

   

    

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