In OBS network, all-optical switching is done. It is possible to have multipath in the network but when a TCP flow switched from a path to another, packet out of order may occur and that make TCP (Reno) mistook as loss. The solution proposed in this paper is that, because the optical switch know precisely the delay differential $\delta$, upon switching paths, the optical switch can delay the packet (bursts) for $\delta$, i.e. reorder the sending sequence in the old and new path, to avoid packet out of order.

Bibliographic data

   title = "Source-Ordering for Improved TCP Performance over Load-Balanced Optical Burst-Switched (OBS) Networks",
   author = "B. Komattireddy and V.M. Vokkarane",
   howpublished = "BROADNETS",
   booktitle = "Proc. IEEE/CreateNet BROADNETS 2007, Optical Networking Symposium",
   month = "Sep",
   year = "2007",
   address = "Raleigh, NC",