TCP NCE: A unified solution for non-congestion events to improve the performance of TCP over wireless networks

Sreekumari, Prasanthi; Chung, Sang-Hwa

doi:10.1186/1687-1499-2011-23

Cited by 24 publications

(9 citation statements)

References 24 publications

(26 reference statements)

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“…FTP sources start sending data at time 0 and are staggered to avoid synchronization. All simulations [37] are run for 150 seconds. The receiver advertises a large window such that the sending rate is not limited by the receiver dynamics.…”

Section: Simulation Environment and Resultsmentioning

confidence: 99%

Acknowledgment Time Delay Approach to Optimize TCP Performance in Hybrid Networked Systems

LakshmiNadh¹,

Krishna²,

Rao³

2014

IJCA

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Transmission Control Protocol (TCP) is connection oriented transport protocol used on IP in wireless medium and it insists lossless data transmission in proper order. When TCP is used as a transmission protocol where physical layer is wireless medium, results high packet reordering due to bursty traffic and drastic variation in quality of service with respect to time. By sharing the same path for data and acknowledgement increases the traffic and collision, resulting in reduced throughput. In order to improve QoS this paper proposes a solution "Improved Delay the Duplicate Acknowledgement" (IDDA). This reduces traffic and spurious retransmissions, thereby improving TCP performance.

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Section: Simulation Environment and Resultsmentioning

confidence: 99%

Acknowledgment Time Delay Approach to Optimize TCP Performance in Hybrid Networked Systems

LakshmiNadh¹,

Krishna²,

Rao³

2014

IJCA

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“…With frequent RTOs, before TCP sender raises size of cwnd to a reasonable value, it is compelled to resets it to a smallest value. Therefore, the effective size of cwnd over the data transfer phase is found inadequate to attain suitable bandwidth share [8] and hence retaining of the same leads to insignificant improvement. b) When BER is small, retaining of cwnd can potentially aggravate congestion in the network and cause heavy packet loss, both for itself and for other traffic in the network, especially if the old estimate of the rate is stale (due to sudden change in the network congestion) [5] [26].…”

Section: Solutions To Retain Value For Cwnd/ssthreshmentioning

confidence: 99%

“…If the loss rate due to wireless errors is high, a TCP sender with large values for TCP state variables has high possibility to have frequent burst losses and long go-back-N retransmissions [5]. Besides, the inaccuracy for estimation the common problem is that, all above techniques paid no attention on revising the Loss Window when RTO's are triggered regardless of congestion [8]. This in turn, inappropriately decelerates slow-start process after RTO, due to minimum Loss Window.…”

Section: Solutions With Advance Value For Cwnd/ssthreshmentioning

confidence: 99%

“…TCP schemes with Loss Differentiation Algorithms (LDA) [6] [7] advocate for retaining of the aforesaid parameters after loss recovery. However, such approaches are incongruous particularly when loss discrimination is merely indicative and information about current network state is either ignored or not available [8]. Furthermore, in wireless networks, a RTO is inevitable (if not spurious [9] [10]), when either the fast retransmission of a lost packet fails to reach the destination or the burst of TCP acknowledgments (TCP-acks) is lost [11].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive TCP: A Sender Side Mechanism with Dynamic Adjustment of Congestion Control Parameters for Performance Improvement in WLAN

Dalal¹,

Sarkar

Dasgupta³

et al. 2015

IJCNS

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This paper presents a sender side only TCP mechanism to prevent compromise for bandwidth utilization in IEEE 802.11 wireless networks. In absence of mechanism for accurate and immediate loss discrimination, the TCP sender unnecessarily reduces its Loss Window in response to the packet losses due to transmission errors. At the same time, frequent transmission losses and associated link retransmissions cause inaccuracy for available bandwidth estimate. The proposal, Adaptive TCP tackles the above issues using two refinements. First, sender estimates the degree of congestion by exploiting the statistics for estimated Round Trip Time (RTT). With this, it prevents unnecessary shrinkage of Loss Window and bandwidth estimate. Second, by concluding the uninterrupted evolution of its sending rate in recent past, the Adaptive TCP advances bandwidth estimate under favorable network conditions. This in turn, facilitates for quick growth in TCP's sending rate after loss recovery and consequently alleviates bandwidth utilization. The authors implement the algorithm on top of TCP NewReno, evaluate and compare its performance with the wireless TCP variants deployed in current Internet. Through intensive simulations it is demonstrated that the Adaptive TCP outperforms other well-established TCP variants, and yields more than 100% of the throughput performance and more than 60% of improvement for bandwidth utilization, compared to TCP NewReno. The simulation results also demonstrated compatibility of Adaptive TCP in a shared wireless environment.

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“…Therefore, one needs to differentiate congestion packet losses against random packet losses [4]. To this direction a number of various versions of TCP have been proposed including TCP Veno [5], TCP New Jersey [6] and TCP NCE [7]. In another work [8], the impact of TCP variants on the performance in MANETs routing protocols is investigated.…”

Section: Related Workmentioning

confidence: 99%

Cross Layer Design for Video Streaming in MANETs

Adam

Bouras

Γκάμας

et al. 2014

JNW

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Mobile Ad hoc NETworks (MANETs) are becoming more essential to wireless communications due to growing popularity of mobile devices. However, MANETs do not seem to effectively support multimedia applications and especially video transmission. In this work, we propose a cross-layer design that aims to improve the performance of video transmission using TCP Friendly Rate Control (TFRC). Our design provides priority to video packets and exploits information from the MAC layer in order to improve TFRC's performance. The proposed cross-layer design utilizes SNR measurements along the routing path, in order to make the route reconstruction procedure more efficient. Simulation results show that both the use of traffic classification and the SNR utilization lead to important improvements in terms of end-to-end Quality of Service (QoS).

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TCP NCE: A unified solution for non-congestion events to improve the performance of TCP over wireless networks

Cited by 24 publications

References 24 publications

Acknowledgment Time Delay Approach to Optimize TCP Performance in Hybrid Networked Systems

Acknowledgment Time Delay Approach to Optimize TCP Performance in Hybrid Networked Systems

Adaptive TCP: A Sender Side Mechanism with Dynamic Adjustment of Congestion Control Parameters for Performance Improvement in WLAN

Cross Layer Design for Video Streaming in MANETs

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