The Performance of TCP Over ATM ABR and UBR Services
Xiangrong CAI, Ohio State University
This is a survey paper on the performance of TCP over ATM ABR and UBR services. Using throughput and fairness as our performance metrics, the effect of the following factors to the performance of TCP over ATM ABR and UBR is discussed here: (1)the switch dropping policies when overflow happens(simple discard, Tail Drop, Drop From Front, Early Packet Drop, Per-VC queuing, Fair Buffer Allocation); (2)the TCP end system policies, such as FRR and SACK; (3)buffer requirements in order to maintain no cell loss or high throughput; and (4)Guarantee Rate. We also make a comparison between the performance of TCP over ABR and TCP over UBR.
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Table of Contents
- Introduction
- TCP Features
- Slow Start and Congestion Avoidance
- Fast Retransmit and Recovery
- Selective Acknowledgments
- ATM Features
- TCP Over ATM
- Performance Metrics
- TCP over UBR
- Switch Dropping Policies
- End System Policies
- Buffer Requirement
- Guaranteed Rate
- TCP Over ABR
- Buffer Requirement
- ABR With Varying Bandwidth
- Comparison Between TCP Over ABR and UBR
- Summary
- Appendix of Acronyms
- References
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