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
TCP/IP illustrated (vol. 2): the implementation
TCP/IP illustrated (vol. 2): the implementation
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Two-Way TCP Traffic over ATM: Effects and Analysis
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Asymmetric digital subscriber line: interim technology for the next forty years
IEEE Communications Magazine
Two-way TCP traffic over rate controlled channels: effects and analysis
IEEE/ACM Transactions on Networking (TON)
Reducing the TCP acknowledgment frequency
ACM SIGCOMM Computer Communication Review
Computer Networks: The International Journal of Computer and Telecommunications Networking
Performance of a GridFTP overlay network
Future Generation Computer Systems
Modeling and emulation of internet paths
NSDI'09 Proceedings of the 6th USENIX symposium on Networked systems design and implementation
Separation of sensor control and data in closed-loop sensor networks
SECON'09 Proceedings of the 6th Annual IEEE communications society conference on Sensor, Mesh and Ad Hoc Communications and Networks
Two-way TCP connections: old problem, new insight
ACM SIGCOMM Computer Communication Review
On the performance modelling and optimisation of DOCSIS HFC networks
Network performance engineering
Fast track article: Least attained recent service for packet scheduling over access links
Pervasive and Mobile Computing
Improving TCP performance in residential broadband networks: a simple and deployable approach
ACM SIGCOMM Computer Communication Review
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The sharing of a common buffer by TCP data segments and acknowledgments in a network or internet has been known to produce the effect of ack compression, often causing dramatic reductions in throughput. We study several schemes for improving the performance of two-way TCP traffic over asymmetric links where the bandwidths in the two directions may differ substantially, possibly by many orders of magnitude. These approaches reduce the effect of ack compression by carefully controlling the flow of data packets and acknowledgments. We first examine a scheme where acknowledgments are transmitted at a higher priority than data. By analysis and simulation, we show that prioritizing acks can lead to starvation of the low-bandwidth connection. Next, we introduce and analyze a connection-level backpressure mechanism designed to limit the maximum amount of data buffered in the outgoing IP queue of the source of the low-bandwidth connection. We show that this approach, while minimizing the queueing delay for acks, results in unfair bandwidth allocation on the slow link. Finally, our preferred solution separates the acks from data packets in the outgoing queue, and makes use of a connection-level bandwidth allocation mechanism to control their bandwidth shares. We show that this scheme overcomes the limitations of the previous approaches, provides isolation, and enables precise control of the connection throughputs. We present analytical models of the dynamic behavior of each of these approaches, derive closed-form expressions for the expected connection efficiencies in each case, and validate them with simulation results.