Here's a simple way to get a window (borrowed from TCP):

When receiving

new_connection_quality = old_connection_quality*X + current_measurement * (1-X)

current_measurement is 1 (packet successfully transfered) or 0 (packet dropped).

TCP uses 0.8 for X.

The connection_quality gets initialized with 1 (good).

Since a disconnect is stronger than the "reduce" of TCP, I'd suggest using 0.9 for X and disconnecting when the connection quality drops below 0.3 (I added simulation code to SVN; needs pyxplot so i attached an image of the algo in operation).

These settings disconnect people who have an average drop rate of 30% when they have a burst of drops, anything below is fine. 60% drop rate gets dropped quickly.

The attached images are

- 30% drop rate with X = 0.9
- 60% drop rate with X = 0.9
- 10% drop rate with X = 0.9

Attached Thumbnails

     

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