Bandwidth estimation schemes for TCP over wireless networks

Capone, Antonio; Fratta, Luigi; Martignon, Fabio

doi:10.1109/tmc.2004.5

Cited by 91 publications

(54 citation statements)

References 20 publications

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“…Estimating this new operating point is a challenge and link layer metrics, that determine the effective bandwidth, must also be considered apart from the raw bandwidth. Bandwidth estimation techniques have been proposed in [3] [7], that do not require information from the intermediate nodes, but also do not respond immediately to the available spectrum.…”

Section: Spectrum Change Statementioning

confidence: 99%

TP-CRAHN: a Transport Protocol for Cognitive Radio Ad-Hoc Networks

2009

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Abstract-Existing research in transport protocols for wireless ad-hoc networks has focused on reliable end-to-end packet delivery under uncertain channel conditions, route failures due to node mobility and link congestion. In a cognitive radio (CR) environment, there are several key challenges that must be addressed apart from the above concerns. The intermittent spectrum sensing undertaken by the CR users, the activity of the licensed users of the spectrum, large-scale bandwidth variation based on spectrum availability, and the channel switching process need to be considered in the transport protocol design. In this paper, a window-based Transport Protocol for CR Ad-Hoc Networks, TP-CRAHN, is proposed that distinguishes each of these events by a combination of explicit feedback from the intermediate nodes and the destination. This is achieved by adapting the classical TCP rate control algorithm running at the source to closely interact with the physical layer channel information, the link layer functions of spectrum sensing and buffer management, and a predictive mobility framework that is developed at the network layer. To the best of our knowledge, this is the first work on the transport layer to specifically address the concerns of the CR ad-hoc networks and our approach is thoroughly validated by simulation experiments.

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Section: Spectrum Change Statementioning

confidence: 99%

TP-CRAHN: a Transport Protocol for Cognitive Radio Ad-Hoc Networks

2009

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“…This behavior is due to its overestimate of the available bandwidth, that leads to aggressive behavior and unfair sharing of network resources, as we showed in the previous Section and as we discussed in detail in [1].…”

Section: Uncorrelated Lossesmentioning

confidence: 76%

“…A possible approach to this problem is to modify the TCP congestion control scheme implementing explicit bandwidth estimation [1,2] and loss differentiation schemes [4][5][6][7][8]. Note that these two approaches are deeply interwined, as we showed in [4] that the most efficient loss differentiation algorithms base their functioning on bandwidth measurements to estimate the cause of packet losses.…”

Section: Introductionmentioning

confidence: 99%

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Loss Differentiation Schemes for TCP over Wireless Networks

Martignon

Fratta

2005

Quality of Service in Multiservice IP Networks

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Abstract. The use of loss differentiation schemes within the congestion control mechanism of TCP was proposed recently as a way of improving TCP performance over heterogeneous networks including wireless links affected by random loss. Such algorithms provide TCP with an estimate of the cause of packet losses. In this paper, we propose to use the Vegas loss differentiation algorithm to enhance the TCP NewReno error-recovery scheme, thus avoiding unnecessary rate reduction caused by packet losses induced by bit corruption on the wireless channel. We evaluate the performance of the so-enhanced TCP NewReno source (TCP NewReno-LP) with both extensive simulation and real test bed measurements, and we compare it with that achieved by existing solutions, namely TIBET [1], TCP Westwood [2] and the standard TCP NewReno. For that purpose, Linux implementations of TCP NewReno-LP, TIBET and TCP Westwood have been developed and compared with an implementation of NewReno. We show that TCP NewReno-LP achieves higher goodput over wireless networks, while guaranteeing fair share of network resources with classical TCP versions over wired links. Finally, by studying the TCP behavior with an ideal scheme having perfect knowledge of the cause of packet losses, we provide an upper bound to the performance of all possible schemes based on loss differentiation algorithms. The proposed TCP enhanced with Vegas loss differentiation algorithm well approaches this ideal bound.

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“…Considerable efforts have been made to improve TCP efficiency over wireless channels [5][6][7]. Some researchers attempted to modify congestion control in order to retain the congestion window during wireless loss [8][9][10]. Others have differentiated congestion losses and wireless channel losses [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Implementation and evaluation of a new TCP loss recovery architecture

Kang

Park

2012

J Wireless Com Network

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In this article, we propose a novel loss recovery algorithm of transmission control protocol (TCP) using packet transmission order, which shows a steady loss recovery ability even though packet loss rate increases. This leads to a significant throughput increase of TCP with heavy packet loss. We have verified the performance increase of the new TCP under various environments such as a wireless network, and multimedia transmission through simulation. Moreover, we implemented the proposed idea in Linux and conducted some experiments in a real environment. Even though the experiment results did not perfectly agree with the simulation results, we obtained a similar throughput increase to that of the simulation.

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Bandwidth estimation schemes for TCP over wireless networks

Cited by 91 publications

References 20 publications

TP-CRAHN: a Transport Protocol for Cognitive Radio Ad-Hoc Networks

TP-CRAHN: a Transport Protocol for Cognitive Radio Ad-Hoc Networks

Loss Differentiation Schemes for TCP over Wireless Networks

Implementation and evaluation of a new TCP loss recovery architecture

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