TCP-Real: receiver-oriented congestion control

Tsaoussidis, Vassilis; Zhang, C.

doi:10.1016/s1389-1286(02)00291-8

Cited by 57 publications

(34 citation statements)

References 24 publications

(44 reference statements)

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“…We believe that solutions like the one proposed in [35], in which the receiver controls the sender's cwnd, may be integrated into our final algorithm. Likewise, the work in [36] could be useful for improving the fairness of our mechanism by including the congestion window in the timeout computation at the sender.…”

Section: Discussionmentioning

confidence: 99%

A Smart TCP Acknowledgment Approach for Multihop Wireless Networks

Oliveira

Braun

2007

IEEE Trans. on Mobile Comput.

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Abstract-Reliable data transfer is one of the most difficult tasks to be accomplished in multihop wireless networks. Traditional transport protocols like TCP face severe performance degradation over multihop networks given the noisy nature of wireless media as well as unstable connectivity conditions in place. The success of TCP in wired networks motivates its extension to wireless networks. A crucial challenge faced by TCP over these networks is how to operate smoothly with the 802.11 wireless MAC protocol which also implements a retransmission mechanism at link level in addition to short RTS/CTS control frames for avoiding collisions. These features render TCP acknowledgments (ACK) transmission quite costly. Data and ACK packets cause similar medium access overheads despite the much smaller size of the ACKs. In this paper, we further evaluate our dynamic adaptive strategy for reducing ACK-induced overhead and consequent collisions. Our approach resembles the sender side's congestion control. The receiver is selfadaptive by delaying more ACKs under nonconstrained channels and less otherwise. This improves not only throughput but also power consumption. Simulation evaluations exhibit significant improvement in several scenarios.

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Section: Discussionmentioning

confidence: 99%

A Smart TCP Acknowledgment Approach for Multihop Wireless Networks

Oliveira

Braun

2007

IEEE Trans. on Mobile Comput.

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“…On the aspect of error classification [11], previously, we have proposed TCP-Real [12], which relies on a novel receiver-oriented and measurement-based congestion control mechanism to differentiate the error nature. If the packet loss is due to random wireless losses, the congestion window is not reduced and the transmission rate is maintained.…”

Section: A Proposalmentioning

confidence: 99%

The dynamics of responsiveness and smoothness in heterogeneous networks

Tsaoussidis

Zhang

2005

IEEE J. Select. Areas Commun.

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Abstract-Additive increase/multiplicative decrease-based protocols, including transmission control protocol (TCP), TCP-friendly, and a new generation of rate-based protocols, attempt to control the tradeoff of responsiveness and smoothness. Traditionally, smoothness has not been a main concern since it does not impact the performance of regular Internet applications such as the Web, FTP, or e-mail. However, multimedia-driven protocols attempt to favor smoothness at the cost of responsiveness. In general, smoothness and responsiveness constitute a tradeoff; however, we uncover undesirable dynamics of the protocols in the context of wireless/mobile networks with high-error rate or frequent handoffs: low responsiveness is not counterbalanced by gains in smoothness, but instead, produces a conservative behavior that degrades protocol performance with both delay-tolerant and -sensitive applications. Based on our observations, as well as on further analysis of the impact of the bottleneck queue on channel utilization, we seek an alternative strategy for smooth window adjustments. We introduce a new parameter , which implements a congestion avoidance tactic and reaches better smoothness without damaging responsiveness.

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“…Notably the lowest goodput of individual flow is less than 10% of the highest one, as demonstrated by worst-case fairness in Figure 8(b). It has already been shown in [17] that with DropTail routers and standard TCP, the main traffic consumed more bandwidth than the cross traffic, due to the fact that packets aggregated into link R1-R2 (see Figure 3) before entering the bottleneck R3 were more uniformly distributed in the time domain; therefore, having smaller probability to get dropped, compared with the bursty traffic of non-aggregated (i.e. connecting to R3 directly) cross-traffic flows.…”

Section: Network Behaviors Over Heterogeneous (Wired/wireless) Networkmentioning

confidence: 67%

A study of deploying smooth‐ and responsive‐TCPs with different queue management schemes

Zhang

Mamatas

Tsaoussidis

2008

Int J Communication

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SUMMARYWhile there exist extensive research works on congestion control and active queue management, or the joint dynamics of a congestion control strategy with the random early detection (RED) algorithm, little has been done on the interactions between different window adjustment strategies and different queue management schemes such as DropTail and RED. In this paper, we consider a spectrum of TCP-friendly additive increase and multiplicative decrease (AIMD) parameters. At the one end of this spectrum, smooth-TCP enhances smoothness for multimedia applications by reducing the window decrease ratio upon congestion, at the cost of the additive increase speed and the responsiveness to available bandwidth. At the other end, responsive-TCP enhances the responsiveness by increasing the additive increase speed, at the cost of smoothness. We investigate the network dynamics with various combinations of AIMD parameters and queue management schemes, under different metrics. The investigation is conducted from the deployment (especially incremental deployment) point of view. We discussed the impact of the interactions on the goodput, fairness, end-to-end delay, and its implications to energy consumption on mobile hosts.

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TCP-Real: receiver-oriented congestion control

Cited by 57 publications

References 24 publications

A Smart TCP Acknowledgment Approach for Multihop Wireless Networks

A Smart TCP Acknowledgment Approach for Multihop Wireless Networks

The dynamics of responsiveness and smoothness in heterogeneous networks

A study of deploying smooth‐ and responsive‐TCPs with different queue management schemes

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