Title: Further Results on Ubr+: Eeect of Fast Retransmit and Recovery. Distribution: Atm Forum Technical Working Group Members(traac Management)
نویسندگان
چکیده
In a previous contribution we studied the performance of TCP over UBR We showed that TCP perfor mance improves by adding EPD and Fair bu er management techniques over UBR In this contribution we study the e ect of Fast Retransmit and Recovery on these enhancements In general Fast Retransmit and Recovery improves the performance of TCP over UBR However in some cases the performance is degraded The incremental gain with Fair Bu er Allocation over simple selective drop using per VC accounting is small Source Rohit Goyal Raj Jain Shiv Kalyanaraman and Sonia Fahmy The Ohio State University and NASA Department of CIS Columbus OH Phone Fax Email Jain ACM Org Seong Cheol Kim Samsung Electronics Co Ltd Chung Ang Newspaper Bldg Karak Dong Songpa Ku Seoul Korea Email kimsc metro telecom samsung co kr
منابع مشابه
Title: Abr Switch Algorithm Testing: a Case Study with Erica Distribution: Atm Forum Technical Working Group Members (traac Management)
This contribution discusses the requirements of ATM Available Bit Rate switch algorithms, and demonstrates how each of these requirements can be tested. As a case study, the performance of the ERICA switch algorithm 1] is evaluated and the eeect of some features and options of the algorithm is examined. The requirements tested include: eeciency, delay, fairness, transient and steady state perfo...
متن کاملRohit Goyal, Performance of Tcp/ip over Ubr+ 1 Title: Performance of Tcp over Ubr+ Distribution: Atm Forum Technical Working Group Members (af-tm)
ATM switches respond to UBR congestion by dropping cells when their buffers become full TCP connections using the UBR service experience low throughput and low fairness For 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 consists of ...
متن کاملTitle: Erica Switch Algorithm: a Complete Description Distribution: Atm Forum Technical Working Group Members (traac Management)
The ERICA switch algorithm has been discussed extensively in TM group in the past. However, over the last two years, the algorithm has been substantially modiied. This contribution describes the current version of ERICA switch algorithm in complete detail. The algorithm achieves both eeciency and fairness, and exhibits a fast transient response. The development of the algorithm is traced, and t...
متن کاملTITLE : Performance Analysis of TCP Enhancements for WWW Traffic using UBR + with Limited Buffers over Satellite Links
This contribution presents the simulation results on the performance of TCP enhancements over ATM-UBR+ for satellite latencies with limited switch buffers for WWW traffic. We analyze the impact of Fast Retransmit and Recovery (FRR or Reno), New Reno, Selective Acknowledgement (SACK), Early packet drop (EPD), and Selective Drop on LEO, MEO, and GEO satellite configurations for several buffer siz...
متن کاملTitle: Ubr Buffer Requirements for Tcp/ip over Satellite Networks Distribution: Atm Forum Technical Working Group Members (af-tm)
In this contribution we present simulation results to assess buffer requirements for TCP IP over satellite UBR networks We perform experiments with both LEO and GEO satellite delays for various buffer sizes and number of sources We conclude that with sufficiently large buffers RTT or more the performance of TCP SACK over UBR with per VC accounting is scalable with respect to the number of sourc...
متن کامل