UBR+: Improving Performance of TCP over ATM-UBR service

Rohit Goyal; Raj Jain; Shiv Kalyanaraman; Sonia Fahmy; Seong-Cheol Kim

UBR+: Improving Performance of TCP over ATM-UBR service

Networking and Internet Architecture 2007-05-23 v1

Authors: Rohit Goyal , Raj Jain , Shiv Kalyanaraman , Sonia Fahmy , Seong-Cheol Kim

Abstract

ATM-UBR switches respond to congestion by dropping cells when their buffers become full. TCP connections running over UBR experience low throughput and high unfairness. For 100% TCP throughput each switch needs buffers equal to the sum of the window sizes of all the TCP connections. Intelligent drop policies can improve the performance of TCP over UBR with limited buffers. The UBR+ service proposes enhancements to UBR for intelligent drop. Early Packet Discard improves throughput but does not attempt to improve fairness. Selective packet drop based on per-connection buffer occupancy improves fairness. The Fair Buffer Allocation scheme further improves both throughput and fairness.

Keywords

TCP ATM UBR buffer management congestion control throughput fairness

Cite

@article{arxiv.cs/9809071,
  title  = {UBR+: Improving Performance of TCP over ATM-UBR service},
  author = {Rohit Goyal and Raj Jain and Shiv Kalyanaraman and Sonia Fahmy and Seong-Cheol Kim},
  journal= {arXiv preprint arXiv:cs/9809071},
  year   = {2007}
}

Comments

ICC'97, Montreal, June 1997, pp1042-1048

UBR+: Improving Performance of TCP over ATM-UBR service

Abstract

Keywords

Cite

Comments

Related papers