Explicit loss indication and accurate RTO estimation for TCP error recovery using satellite links

Samaraweera, N.; Fairhurst, Godred

doi:10.1049/ip-com:19971014

Cited by 11 publications

(4 citation statements)

References 3 publications

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“…[9,8,41,40] in showing that schemes that allow a sending TCP to determine the cause of a segment loss would be useful to bulk transfer applications, especially in networks with nonnegligible packet corruption rates. This conclusion holds across a number of different network types and a range of BERs.…”

Section: Discussionmentioning

confidence: 99%

Explicit transport error notification (ETEN) for error-prone wireless and satellite networks

Krishnan¹,

Sterbenz

Eddy

et al. 2004

Computer Networks

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Wireless and satellite networks often have non-negligible packet corruption rates that can significantly degrade TCP performance. This is due to TCP's assumption that every packet loss is an indication of network congestion (causing TCP to reduce the transmission rate). This problem has received much attention in the literature. In this paper, we take a broad look at the problem of enhancing TCP performance under corruption losses, and include a discussion of the key issues. The main contributions of this paper are: ( ) a confirmation of previous studies that show the reduction of TCP performance in the face of corruption loss, and in addition a plausible upper bound achievable with perfect knowledge of the cause of loss, ( ) a classification of the potential mitigation space, and ( ) the introduction of a promising new mitigation that employs rich cumulative information from intermediate nodes in a path to form a better congestion response.We first illustrate the performance implications of corruption-based loss for a variety of networks via simulation. In addition, we show a rough upper bound on the performance gains a TCP could get if it could perfectly determine the cause of each segment loss -independent of any specific mechanism for TCP to learn the root cause of packet loss. Next, we provide a taxonomy of potential practical classes of mitigations that TCP end-points and intermediate network elements can cooperatively use to decrease the performance impact of corruption-based loss. Finally, we briefly consider a potential mitigation, called cumulative explicit transport error notification (CETEN), which covers a portion of the solution space previously unexplored. CETEN is shown to be a promising mitigation strategy, but a strategy with numerous formidable practical hurdles still to overcome.£ Pre-print: Accepted for publication in Elsevier Computer Networks.

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Section: Discussionmentioning

confidence: 99%

Explicit transport error notification (ETEN) for error-prone wireless and satellite networks

Krishnan¹,

Sterbenz

Eddy

et al. 2004

Computer Networks

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“…When the analysis of jitter sequences indicate that the loss in question is due to transmission, XRTP resorts to additional precautionary mechanism as follows. XRTP incorporates the relative one-way trip times (ROTT) [25] and the deviation of ROTT [20] into the heuristic. XRTP determines the ratio of the difference between current and minimum ROTT to the difference between maximum and minimum ROTT.…”

Section: Loss Discriminationmentioning

confidence: 99%

Designing a rate-based transport protocol for wired-wireless networks

Gaonkar

Choudhury

Magalhães

et al. 2007

2007 Fourth International Conference on Broadband Communications, Networks and Systems (BROADNETS '07)

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A large majority of the Internet traffic relies on TCP as its transport protocol. In future, as the edge of the Internet continues to extend over the wireless medium, TCP (or its close variants) may not prove to be appropriate. The key reason is in TCP's inability to discriminate congestion losses from transmission losses. Since transmission losses are frequent in wireless networks, the penalty from loss misclassification can become high, leading to performance degradation. This paper presents an eXtended Rate-based Transport Protocol (XRTP), designed to support communication over lossy wireless media. We depart from the ack-based rate control paradigm. Instead, we try to estimate the network conditions by injecting probe packets at the sender, and then observing the spacing between packets that arrive at the receiver. We show that these observations can be useful indicators of available bandwidth, network congestion, and even the cause of packet loss. The inferences from the observations are utilized to regulate the transmission rate at the sender, leading to desirable properties of congestion control and loss discrimination. Simulation results show the efficacy of our proposed rate-based protocol in lossy wireless environments.

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“…There have been many proposals for extending TCP to improve the performance when the losses are mainly due to corruption. Some of the proposed mechanisms are the Explicit Loss Notification (ELN) mechanism [ [3], [22], [23]], Explicit Transport Error Notification (ETEN) [12], Indirect-TCP (I-TCP) [2], TCP PEACH [1] etc. These proposals improve the performance of TCP when packets get corrupted in the network.…”

Section: Fig 1 Iridium Leo Networkmentioning

confidence: 99%

Robust TCP (TCP-R) with Explicit Packet Drop Notification (EPDN) for Satellite Networks

Sathiaseelan

Radzik

2005

Networking - ICN 2005

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Abstract. Numerous studies have shown that packet reordering is common, especially in satellite networks where there are regular handoffs occurring between neighboring satellites. Reordering of packets decreases the TCP performance of a network, mainly because it leads to overestimation of the congestion of the network. We consider satellite networks and analyze the performance of such networks when reordering of packets occurs. We propose a solution that could significantly improve the performance of the network when reordering of packets occurs in the satellite network. We report results of our simulation experiments, which support this claim. Our solution is based on enabling the senders to distinguish between dropped packets and reordered packets.

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Explicit loss indication and accurate RTO estimation for TCP error recovery using satellite links

Cited by 11 publications

References 3 publications

Explicit transport error notification (ETEN) for error-prone wireless and satellite networks

Explicit transport error notification (ETEN) for error-prone wireless and satellite networks

Designing a rate-based transport protocol for wired-wireless networks

Robust TCP (TCP-R) with Explicit Packet Drop Notification (EPDN) for Satellite Networks

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