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A Comparison of ABR and UBR to Support TCP Traffic for LAN Interconnection [chapter]

Sam Manthorpe, Jean-Yves Le Boudec
1999 High-Performance Networks for Multimedia Applications  
Abstract| This paper compares the performance of ABR and UBR for providing high-speed network interconnection services for TCP tra c.  ...  This is shown to be true in a wide selection of scenarios. Four phenomena that may lead to bad ABR performance are identi ed and we test whether each of these has a signi cant impact on TCP goodput.  ...  The authors acknowledge the support of the Swiss PTT Telecom for funding this research. They also thank Olivier Bonaventure and Andres Meyer for constructive feedback on the STCP tool.  ... 
doi:10.1007/978-1-4615-5541-4_3 fatcat:uj3q36o6brdzdftmhjfggwge44

Performance and buffering requirements of Internet protocols over ATM ABR and UBR services

S. Kalyanaraman, R. Jain, S. Fahmy
1998 IEEE Communications Magazine  
This paper analyzes the performance of TCP/IP protocols over ATM network's Available Bit Rate (ABR) and Unspecified Bit Rate (UBR) services.  ...  It is shown that ABR pushes congestion to the edges of the ATM network while UBR leaves it inside the ATM portion.  ...  With UBR, ATM switches behave similar to legacy routers, and most of the congestion control is exercised by TCP. It is interesting to compare the performance of TCP over ABR and UBR.  ... 
doi:10.1109/35.685383 fatcat:mtejckr3kja7xcgpijb4fmlyly

Traffic management for TCP/IP over satellite ATM networks

R. Goyal, R. Jain, M. Goyal, S. Fahmy, B. Vandalore, S. Kota
1999 IEEE Communications Magazine  
The main goal of this article is to discuss design and performance issues for the transport of TCP over UBR, GFR, and ABR services for satellite ATM networks.  ...  The following sections discuss the design and performance issues for TCP over UBR, GFR, and ABR services for satellite networks.  ... 
doi:10.1109/35.751496 fatcat:5t2276qmyfcinlb2qa3x73fp4e

The dual flow control problem of TCP over ATM ABR services

Yuan-Cheng Lai, Ying-Dar Lin, Hsiu-Fen Hung
1999 International Journal of Communication Systems  
ective packet loss, TCP performs often a slow start, especially in congested networks. Therefore, it is important to implement the use-it-or-lose-it policy in ABR #ow control.  ...  Phenomena and solutions 4.2.1. Unused high ACR and underyowed switch queue. We conducted two simulation experiments for cell-loss-free and cell-loss networks to investigate the dual control.  ...  Many studies investigated the performance of TCP over ATM with UBR or ABR service.  ... 
doi:10.1002/(sici)1099-1131(199907/08)12:4<309::aid-dac404>;2-7 fatcat:j4jdy7j6ufag5bxsjsrsq3y2ea

Buffer management and rate guarantees for TCP over satellite-ATM networks

Rohit Goyal, Raj Jain, Mukul Goyal, Sonia Fahmy, Bobby Vandalore, Sastri Kota, Norm Butts, Thomas vonDeak
2001 International journal of satellite communications  
er management, TCP policies and rate guarantees on TCP performance, depend heavily on the latency of the network. Second, we show through simulations that the bu!  ...  Problem 2 (Buwer requirements for TCP over satellite-UBR) We present simulation results to calculate the switch bu!er sizes that provide high TCP performance over satellite. 112 R. GOYAL ET AL.  ...  We discuss the performance of DFBA for TCP over satellite-ATM networks. E Available bit rate (ABR): The ABR service provides an MCR guarantee to the VCs and a fair share of any unused capacity.  ... 
doi:10.1002/sat.701 fatcat:3u7qaojno5bxxfjeumxqtxojba

Performance of TCP over ABR on ATM backbone and with various VBR traffic patterns [article]

Shiv Kalyanaraman, Raj Jain, Sonia Fahmy, Rohit Goyal, Jianping Jiang, Seong-Cheol Kim
1998 arXiv   pre-print
We extend our earlier studies of buffer requirements of TCP over ABR in two directions. First, we study the performance of TCP over ABR in an ATM backbone.  ...  On the backbone, the TCP queues are at the edge router and not inside the ATM network. The router requires buffer equal to the sum of the receiver window sizes of the participating TCP connections.  ...  Summary We h a v e presented further results on the issue of bu ering requirements for TCP over ABR.  ... 
arXiv:cs/9809072v1 fatcat:wdfca4qs5vgj5hybuxukz74s3e

Satellite ATM Network Architectural Considerations and TCP/IP Performance [article]

Sastri Kota, Rohit Goyal, Raj Jain
1998 arXiv   pre-print
We have presented the buffer requirements for TCP/IP traffic over ATM-UBR for satellite latencies.  ...  A buffer size of about 0.5 * RTT to 1 * RTT is sufficient to provide over 98% throughput to infinite TCP traffic for long latency networks and a large number of sources.  ...  We present simulation results for TCP performance and bu er requirements over the satellite-ATM-UBR service, and provide guidelines on improving TCP performance in such situations.  ... 
arXiv:cs/9809062v1 fatcat:4wgap6fosrcahjxevvfouhdcki

SD+: Improving TCP Performance over ATM-UBR Service Using Selective Drop Buffer Management Scheme [chapter]

Aly E. Elabd, Mohamed A. Mostafa
2000 Managing QoS in Multimedia Networks and Services  
This paper explains the concepts behind the new scheme and demonstrates its effect on TCP performance using simulation.  ...  The new scheme that we call SD+ remarkably enhanced both throughput and fairness ofTCP running over ATM-UBR service.  ...  Several studies have analysed the performance of TCP over the ATM-UBR service concluding that TCP applications running over ATM-UBR switches with limited buffer size suffer from low throughput and are  ... 
doi:10.1007/978-0-387-35532-0_2 fatcat:eq3og5f75rhlxkazdp4rzpu3b4

Stop & Go ABR: A Simple Algorithm for the Implementation of Best Effort Services in ATM LANs [chapter]

M. Ajmone Marsan, K. Begain, R. Lo Cigno, M. Munafò
1998 Broadband Communications  
The Stop & Go ABR algorithm is first described, and then evaluated by detailed simulation of a simple ATM LAN configuration with best effort TCP connections as well as interfering VBR connections, showing  ...  that it is capable of providing very good performance and fairness.  ...  Numerical results Let us first of all analyse the impact of the PCR value on the network performance in the reference simulation scenario with Stop & Go ABR.  ... 
doi:10.1007/978-0-387-35378-4_40 fatcat:imz3ovj625dylb623zunptdiry

Indicators for the assessment of congestion in TCP over ATM-UBR [chapter]

Mohammad A. Rahin, Mourad Kara
1998 Broadband Communications  
of congestion in TCP over ATM-UBR.  ...  It is shown through simulation of multiple TCP connections over a ATM-UBR service under selected number of different operating conditions that the two new indicators can be successfully used for the analysis  ...  TCP over ATM performance.  ... 
doi:10.1007/978-0-387-35378-4_30 fatcat:nsm4vxik7ne3dhms4fpnqx3hee

Improving the Performance of TCP over the ATM-UBR service [article]

ohit Goyal, Raj Jain, Shiv Kalyanaraman, Sonia Fahmy, Bobby Vandalore
1998 arXiv   pre-print
Intelligent switch drop policies and end-system policies can improve the performance of TCP over UBR with limited buffers.  ...  We describe the various design options available to the network as well as to the end systems to improve TCP performance over UBR.  ...  We present the performance of TCP over vanilla UBR and explain why TCP over vanilla UBR results in poor performance.  ... 
arXiv:cs/9809053v1 fatcat:rsoijsigoreiphpip5dsmaw4aa

Providing rate guarantees for internet application traffic across ATM networks

I. Andrikopoulos, A. Liakopoulos, G. Pavlou, Z. Sun
1999 IEEE Communications Surveys and Tutorials  
The TCP/IP protocol suite is the standard requirement for all applications that need to communicate over the Internet.  ...  across ATM networks.  ...  ACKNOWLEDGMENTS The authors would like to thank the anonymous reviewers of this article for their insightful comments and constructive criticism.  ... 
doi:10.1109/comst.1999.5340707 fatcat:7awcbicaufflrax5kwpshoxgz4

A CAC Algorithm for ATM Networks Supporting Different QoS Classes [chapter]

M. Ajmone Marsan, A. Bianco, C. Casetti, P. Castelli, R. Lo Cigno, M. Mellia, M. Munafò
2000 IFIP Advances in Information and Communication Technology  
This paper describes a connection admission control (CAC) algorithm for ATM networks supporting different Quality of Service (QoS) classes, and illustrates its effectiveness with simulation results considering  ...  both the call-level and the cell-level dynamics.  ...  As far as TCP connections are concerned, a great difference is observed between the use of the UBR and the ABR service classes.  ... 
doi:10.1007/978-0-387-35353-1_15 fatcat:knbb2jloujfwtayejlj5y376tu

Management of parallel UBR flows over TCP in congested ATM networks

A. Ishtiaq, Y. Okabe, M. Kanazawa
2004 Computer Communications  
In this paper, we describe the throughput performance of Linux TCP over parallel UBR flows in the presence of high priority traffic class like CBR.  ...  The Linux TCP implementation consists of TCP Reno, NewReno and Selective Acknowledgement Options. This has improved the throughput of TCP/IP over the Internet.  ...  TCP over UBR has been subject to many other simulation studies [9] and [12] . The main outcome of these studies is that large UBR buffers are required to achieve reasonable performance.  ... 
doi:10.1016/j.comcom.2004.02.004 fatcat:ig234firk5bz5pm4w442fr2c7e

Influence of the ATM service category on TCP performance in large networks

Thorsten Mueller, Halid Hrasnica, Ralf Lehnert, Robert D. van der Mei, Daniel P. Heyman
1999 Performance and Control of Network Systems III  
This paper investigates the performance of interactive TCP services over large scale ATM networks with many TCP connections by means of simulation.  ...  The network under study consists of 8 ATM switches, interconnected by a mesh of ATM links and attached Fast Ethernet LANs with TCP end systems. The switches allow CBR, VBR.1, VBR.3 and UBR tra c.  ...  Baumann formerly Dresden University o f T echnology for his assistance in developing the simulation modules.  ... 
doi:10.1117/12.360367 fatcat:47j3eld7ibatnpq77ptd7vipo4
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