TCP/IP performance over satellite links

Partridge, Craig; Shepard, Timothy G.

doi:10.1109/65.620521

Cited by 243 publications

(102 citation statements)

References 12 publications

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“…Reducing the BER is not always possible in satellite environments. However, since TCP takes a long time to recover from lost packets because the long propagation delay imposed by a satellite link delays feedback from the receiver [PS97], the link should be made as clean as possible to prevent TCP connections from receiving false congestion signals. This document does not make a specific BER recommendation for TCP other than it should be as low as possible.…”

Section: Forward Error Correctionmentioning

confidence: 99%

Enhancing TCP Over Satellite Channels using Standard Mechanisms

Allman¹,

Glover²,

Sánchez³

1999

263

170

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The Transmission Control Protocol (TCP) provides reliable delivery of data across any network path, including network paths containing satellite channels. While TCP works over satellite channels there are several IETF standardized mechanisms that enable TCP to more effectively utilize the available capacity of the network path. This document outlines some of these TCP mitigations. At this time, all mitigations discussed in this document are IETF standards track mechanisms (or are compliant with IETF standards).

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Section: Forward Error Correctionmentioning

confidence: 99%

Enhancing TCP Over Satellite Channels using Standard Mechanisms

Allman¹,

Glover²,

Sánchez³

1999

263

170

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“…In network paths with large bandwidth · delay products, TCP needs a considerable amount of time to set its congestion window, cwnd, to the appropriate value [1]. Furthermore, TCP reacts to segment drops by lowering cwnd [2].…”

Section: Introductionmentioning

confidence: 99%

SaTPEP: A TCP Performance Enhancing Proxy for Satellite Links

Velenis

Kalogeras

Maglaris

2002

NETWORKING 2002: Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile A

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Abstract. Satellite link characteristics cause reduced performance in TCP data transfers. In this paper we present SaTPEP, a TCP Performance Enhancing Proxy which attempts to improve TCP performance by performing connection splitting. SaTPEP monitors the satellite link utilization, and assigns to connections window values that reflect the available bandwidth. Loss recovery is based on Negative Acknowledgements. The performance of SaTPEP is investigated in terms of goodput and fairness, through a series of simulation experiments. Results obtained in these experiments, show significant performance improvement in presence of available bandwidth and at high error rates.

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“…Moreover, packet loss is known to be a poor signal of congestion, since congestion is in general not the only source of loss. Consequently, TCP becomes inefficient and prone to instability and unfairness when the delay-bandwidth product of a connection increases [7][8][9][10]. Explicit congestion control mechanisms [1,11,12], where routers provide explicit feedback to the sender regarding network congestion, have been shown to solve the problems related to imprecise and late feedbacks.…”

Section: Introductionmentioning

confidence: 99%

Loss-resilient window-based congestion control

Vleeschouwer

Frossard

2008

Computer Networks

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This paper addresses the problem of fair allocation of bandwidth resources on lossy channels in hybrid heterogeneous networks. It discusses more particularly the ability of window-based congestion control to support non-congestion related losses. We investigate methods for efficient packet loss recovery by retransmission, and build on explicit congestion control mechanisms to decouple the packet loss detection from the congestion feedback signals. For different retransmission strategies that respectively rely on conventional cumulative acknowledgments or accurate loss monitoring, we show how the principles underlying the TCP retransmission mechanisms have to be adapted in order to take advantage of an explicit congestion feedback. A novel retransmission timer is proposed in order to deal with multiple losses of data segments and, in consequence, to allow for aggressive reset of the connection recovery timer. It ensures significant benefit from temporary inflation of the send-out window, and hence the fair share of bottleneck bandwidth between loss-prone and lossy connections. Extensive simulations analyze the performance of the new loss monitoring and recovery strategies, when used with two distinct explicit congestion control mechanisms. The first one relies on a coarse binary congestion notification from the routers. The second one, introduced in [D. Katabi, M. Handley, C. Rohrs, Internet congestion control for high bandwidth-delay product environments, ACM SIGCOMM (2002) 89-102], exploits accurate and finely-tuned router feedbacks to compute a precise congestion window adjustment. For both congestion control mechanisms, we observe that retransmissions triggered based on a precise monitoring of losses lead to efficient utilization of lossy links, and provide a fair share of the bottleneck bandwidth between heterogeneous connections, even for high loss ratios and bursty loss processes. Explicit window-based congestion control, combined with appropriate error control strategies, can therefore provide a valid solution to reliable and controlled connections over lossy network infrastructures.

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TCP/IP performance over satellite links

Cited by 243 publications

References 12 publications

Enhancing TCP Over Satellite Channels using Standard Mechanisms

Enhancing TCP Over Satellite Channels using Standard Mechanisms

SaTPEP: A TCP Performance Enhancing Proxy for Satellite Links

Loss-resilient window-based congestion control

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