Mobile internet and Wi-Fi connection simultaneously on Android phone

[AC Question]

I am trying to control a Parrot AR Drone 2.0 from a server.

The connection is supposed to be:

Mobile JAVA app sends http request to server-based PHP web service.
Web service then calculates an array of flight commands, formats it to JSON and returns to JAVA app (mobile phone).
JAVA app then sends low-level flight commands to drone via Wi-Fi connection.
The problem is that the mobile phone (tested with Android OS) seems to lose Wi-Fi connection when a new HTTP request is sent using mobile internet.

Is it possible to use both, mobile internet and Wi-Fi connection simultaneously? Is it an Android OS problem?

 

[STARGATE]

Hello there.
I think the other platforms act the same way.
Can't you just use wifi only?
You could have airplane mode on with wifi on.