Rohit Goyal, Raj Jain, Shivkumar Kalyanaraman, Sonia Fahmy, Bobby Vandalore, Sastri Kota, " TCP Selective Acknowledgments and UBR Drop Policies to Improve ATM-UBR Performance over Terrestrial and Satellite Networks", Proceedings of the Sixth International Conference on Computer Communications and Networks (ICCCN '97) Las Vegas, September 1997, pp. 17-27.


We study the performance of Selective Acknowledgments with TCP over the ATM-UBR service category. We examine various UBR drop policies, TCP mechanisms and network configurations to recommend optimal parameters for TCP over UBR. We discuss various TCP congestion control mechanisms compare their performance for LAN and WAN networks. We describe the effect of satellite delays on TCP performance over UBR and present simulation results for LAN, WAN and satellite networks. SACK TCP improves the performance of TCP over UBR, especially for large delay networks. Intelligent drop policies at the switches are an important factor for good performance in local area networks.

Complete paper in Adobe Acrobat (1,161,410 Bytes)

Back to the List of Papers
Back to Raj Jain's home page