Congestion avoidance and control
SIGCOMM '88 Symposium proceedings on Communications architectures and protocols
Observations on the dynamics of a congestion control algorithm: the effects of two-way traffic
SIGCOMM '91 Proceedings of the conference on Communications architecture & protocols
Dynamics of congestion control and avoidance of two-way traffic in an OSI testbed
ACM SIGCOMM Computer Communication Review
Observing TCP dynamics in real networks
SIGCOMM '92 Conference proceedings on Communications architectures & protocols
Dynamics of TCP traffic over ATM networks
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
TCP/IP illustrated (vol. 2): the implementation
TCP/IP illustrated (vol. 2): the implementation
Improving TCP throughput over two-way asymmetric links: analysis and solutions
SIGMETRICS '98/PERFORMANCE '98 Proceedings of the 1998 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
Performance of a GridFTP overlay network
Future Generation Computer Systems
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We examine the performance of bidirectional TCP/IP connections over Asynchronous Transfer Mode (ATM) networks using the Available Bit Rate (ABR) service. The problem of ``ack-compression'' re-appears, although the queues are primarily at the end-systems. We further the understanding of the problem by quantitatively analyzing the periodic bursty behavior of the source IP queue. We are able to predict the peak values for the queue and arrive at a simple robust predictor for the degraded throughput, applicable for relatively general situations.The degradation in throughput due to bidirectional traffic can be significant. For example, even in the simple case of symmetrical connections with adequate window sizes, the throughput of each connection is only 66.67% of that under one-way traffic. We validate our analysis using simulation, where the ATM network uses the Explicit Rate option. We show that the analysis predicts the behavior of the queue and the throughput degradation. We observe the need to separate the flow of acknowledgments and data for the bidirectional TCP connection and for inter-leaving their processing at the end-systems to overcome the problem of ack compression.