This paper deals with TCP over multipath networks. It suggest to modify TCP to enhance its performance over multipath, namely, increase the dupthresh to \(D(1+\lfloor\log_2N\rfloor)\) where \(D\) is the number (=3) of dup ACKs to trigger fast retransmission by default. Furthermore, the receiver delay ACK the packets out-of-order by ACK only every two segments or after a timer expiration but ACK immediately for every retransmitted packets.

Bibliographic data

   title = "Improving TCP Performance in Multipath Packet Forwarding Networks",
   author = "Youngseok Lee and Ilkyu Park and Yanghee Choi",
   journal = "J. Comm. and Networks",
   volume = "4",
   number = "2",
   pages = "148--157",
   month = "June",
   year = "2002",