akshay6697 / modification-of-dctcp Goto Github PK

When we checkout the commit "DCTCP Patch applied" and try to compile, the code crashes. It seems that the patch has not been applied properly.

Modification 2 proposed in the T DCTCP paper is resetting alpha ( Congestion indicator ) after Delayed Ack Timeout happens. But as we know it, Delayed Ack Timeout happens on Receiver side after which it sends cumulative Ack for all the packets that it received. Here, in the paper, according to our understanding, it means no Ack arrived to sender side for duration equal to Delayed Ack Timeout.
So,based on this, we propose to do following change

On arrival of every Ack
     t =  difference of arrival time of current Ack and the previous Ack 
     If ( t > Delayed Ack Timeout)
         alpha = 0 

We need to add a variable to store the time of previous Ack Arrival.
Link to the paper : http://ieeexplore.ieee.org/xpls/icp.jsp?arnumber=6465539&tag=1