Multi player problem

[Sleepy026]

Here is my problem:

When i play with my friend ( he is the host ) i got random disconnections and it says " you lost your connection to the game " or something like this because i play on hungarian language. And this problem occours 3times in 20minitues or just once or more often. We play on PC with wifi both of us, but my ping is around 20-30.

What should we do ?