fairness of tcp congestion control

... 5 1.4 Organization of Thesis 6 2 Related Work 8 2.1 TCP Congestion Control 8 2.1.1 Traditional cwnd-based Congestion Control Algorithms 9 2.1.2 Rate Based Congestion Control Algorithms ... Based TCP Congestion Control Framework 42 4.1 Rate-Based Congestion Control 43 4.1.1 Congestion Control Mechanism 44 Trang 84.1.2 Estimating the Receive Rate 484.1.3 Inferring Congestion ... Distribution of the number of packets in flight for TCP down-load both with and without a concurrent updown-load 41 4.1 Model of uplink buffer saturation problem 43 4.2 Comparison of TCP congestion control

Ngày tải lên: 09/09/2015, 11:17

...  regularly,omit  some  fields  of  TCP  header). § Delayed  ACKs  -­-­ ACK  only  every  other  segment. Trang 20Summary  -­ TCP  Congestion  ControlTrang 21Summary:  TCP  Congestion  Controlq when  cwnd ...  the  Congestion  Windowq Decrease  window  when  TCP  perceives  high  congestion.q Increase  window  when  TCP  knows  that  there  is  not  much  congestion q How  ?  Since  increased  congestion ... Recovery. Trang 19TCP  Renoq The  version  of  TCP  wherein  fast  retransmit  and  fast  recovery  are  added  in  addition  to  previous   congestion  control  mechanisms  is  called  TCP  Reno §

Ngày tải lên: 10/01/2020, 23:44

...  mechanisms § TCP  flow  control:  receiver  window § TCP  congestion  control:  congestion  window § TCP  window:  min{congestion  window,  receiver  window} Trang 6Three  Key  Features  of  Internet ...  the  Congestion  Windowq Decrease  window  when  TCP  perceives  high  congestion.q Increase  window  when  TCP  knows  that  there  is  not  much  congestion q How  ?  Since  increased  congestion ... Recovery. Trang 19TCP  Renoq The  version  of  TCP  wherein  fast  retransmit  and  fast  recovery  are  added  in  addition  to  previous   congestion  control  mechanisms  is  called  TCP  Reno §

Ngày tải lên: 11/04/2023, 10:47

... compared to TCP NewReno, TCP PR, RR TCP, TCP Veno, and TCP DOOR when the network coexisted with congestion and non-congestion events Also, we compared the accuracy and fairness of TCP NCE and ... modification of TCP congestion control algorithms is necessary especially fast retransmission and recovery For the higher performance of TCP over Figure 1 Congestion control algorithms of TCP. Figure ... retransmission upto the expiration of the dynamic delay threshold value We evaluated TCP NCE with other TCP schemes such as TCP Veno, TCP CERL, RR-TCP, TCP PR, TCP NewReno, and TCP DOOR and compared the

Ngày tải lên: 21/06/2014, 02:20

... evaluation of TCP and TCP-friendly rate control flows for wired and wireless networks that have been referred in this thesis 2.1.1 Congestion Control in TCP The general congestion control framework of ... contribution of this thesis, characterization of TCP-friendly rate control flows for wired networks through real-time measurements and analysis of some of the major issues The second contribution of this ... of the current Internet is due in large part to the end-to-end congestion control mechanisms of TCP However, while TCP congestion control is appropriate for applications such as bulk data transfer,

Ngày tải lên: 28/11/2015, 13:34

... 4.5 Congestion control for multimedia applications 139 4.5.1 TCP-friendly congestion control mechanisms 143 4.5.2 The Datagram Congestion Control Protocol (DCCP) 149 4.5.3 Multicast congestion ... Trang 2Network Congestion ControlManaging Internet Traffic Michael Welzl Leopold Franzens University of Innsbruck Trang 4Network Congestion ControlTrang 6Network Congestion ControlManaging Internet ... of today It consists of two parts:first, congestion control in end systems is explained In the present Internet, this is syn-onymous with the word ‘TCP’ The second part focuses on congestion control

Ngày tải lên: 02/03/2013, 16:59

... modules. Abbreviations CCP, complement control protein; CCP1, first complement control protein module of C1r; CCP2, second complement control protein module of C1r; CCP1CCP2, tandem of the two CCPs from C1r; ... NH flexibility is typically given in terms of the square of the generalized order parameters, S 2 , as the rate of physical restriction of NH motion, and of effective correlation time, s e , on ... Set of HSQC spectra of CCP1CCP2 (#2) collected at 280, 300 and 320 K at pH 4.0 Fig S11 Set of HSQC spectra of CCP1CCP2 (#2) collected at 300 and 315 K at pH7.0 Fig S12 Overlay of

Ngày tải lên: 15/03/2014, 23:20

... Trang 1Annex A.3 Review of Tuberculosis Infection Control Trang 2Review of Tuberculosis Infection Control Trang 3Why ts there concern about IB Infection control in HIV care facilities ... risk of TB transmission in the outpatient facility These are: - work practice and administrative control measures and - environmental control measures Trang 40Work practice and administrative controls ... quickly it declines varies from patient to patient Trang 35TB Infection ControlTrang 36About 30% of people who spend a lot of time with someone who has infectious TB disease become infected with

Ngày tải lên: 22/03/2014, 18:20

... with a lower value of α but a non-zero β Thus, we tested the performance of our model on the reading of a corpus of text typ-ical of that used in reading experiments at a range of reasonable non-regressive ... Figure 3: Mean number of timesteps taken to read a sentence and (natural) log probability of the true identity of the sentence ‘Accuracy’ for a range of values of α and β Values of α are not labeled, ... level of anal-ysis, predicting not aggregate measures, but the duration and location of each fix-ation We present a new rational model of eye movement control in reading, the cen-tral assumption of

Ngày tải lên: 23/03/2014, 16:20

... understanding of the mechanism underlying speech motor control However, there is a lack of literature in quantitative measures of motor control, which may potentially characterize the nature of the ... study of speech motor control in children with CP The lack of this type of research on CP children may be due to the technical difficulty of managing movement artifacts due to head or trunk control ... temporal control (high variability on utterance durations) for speech The temporal control indicates the appropriate timing control of muscle activations and de-activations and spatial control

Ngày tải lên: 19/06/2014, 08:20

... jitter ratio to compare withk/w ratio. 3.2 Congestion Control Policy of JSCTP 3.2.1 Rate-Based Congestion Control Original congestion control scheme of SCTP followed AIMD algorithm to probe available ... evaluate the mentioned TCP congestion control schemes such as TCP Westwood and TCP New Jersey on the primary path The main objective of this scenario is to observe that the difference of performance when ... ability for interprotocol fairness even if loss rate is variable Our modification of congestion control scheme complies with fairness issue 4.4 TCP Friendliness Currently, TCP has been widely used

Ngày tải lên: 21/06/2014, 05:20

... occupancy SenTCP [6] uses hop-by-hop, open-loop congestion control mechanism that detects congestion using both buffer occupancy and packet interarrival time In SenTCP, nodes avoid congestion by ... case of congestion, the greater will be the number of packets dropped since congestion can only be mitigated in schedule intervals by adjusting the slot length of nodes The smaller the length of ... throughput since the AMID rate control scheme operates irrespective of number of event reporting nodes Also, sending congestion signal to source nodes in case of congestion is difficult resulting

Ngày tải lên: 21/06/2014, 23:20

... Trang 1MINISTRY OF EDUCATION AND TRAINING MINISTRY OF HEALTH NATIONAL INSTITUTE OF HYGIENE AND EPIDEMIOLOGY SUBURBS OF HANOI Major: Epidemiology Code: 62 72 70 01 ABSTRACT OF DOCTOR OF MEDICINE ... of dentistry program aiming at raising the quality, effectiveness of oral and dental diseases prevention for the pupils, within the framework of the project “Assess the efficiency of school of ... dentistry activities in Hanoi in 2009-2010 of National Institute of Othodonto – Stomatology”, we researched the theme: “Assess the efficiency of dental plaque control in decay teeth, gingivitis prevention

Ngày tải lên: 25/07/2014, 13:57

... development of fibrillation Due to the lack of understanding of the basic mechan-isms of AF following cardiac surgery, it is difficult to pro-pose a theory on the protective role of tight glycaemic control ... to the role of tight glycaemic control, during and after cardiac surgery, there remains a certain degree of uncertainty The purpose of this study was to conduct a systematic review of the literature ... increasing levels of tight glycae-mic control The timing of this control and the benefits, risks and underlying physiological mechanisms associated with aggressive glycaemic control also require

Ngày tải lên: 10/08/2014, 09:23

... physician diagnosis of knee OA Power of the dataset Before recruitment, the power of the dataset was esti-mated with 800 cases and an equal number of controls using EpiManager software [15] The ... to work as a consequence of diseases or disorders of the musculoskeletal system and the connective tissue resulted in 103.6 million days of absence (23.7% of all days of absence) in Germany in ... domestic product of €17.3 billion [1] One of the frequent impairing disorders of the musculoskeletal system is knee osteoarthritis (OA) The central pathologic features of OA are the loss of hyaline

Ngày tải lên: 12/08/2014, 12:20

... been no similar review of the control proce-dures and control group outcomes of trials of manipula-tion in the cervical spine for neck pain and headaches, although a review of control group outcomes ... observed in 47% of paired comparisons The vast majority of studies do not result in subject blinding; the effect of unmasking of control subjects in these studies makes the interpretation of the existing ... equali-zation of the non-specific effect of physical touch between groups of subjects, and 2) the blinding of the subject as to the nature of the treatment Hawk et al identified the essence of such

Ngày tải lên: 13/08/2014, 15:21

... ‘flow control’ and ‘congestion control’ are sometimesused synonymously) Controlling the rate of a data flow within the network for the sake ofthe network itself is clearly what we nowadays call ‘congestion ... deviation It is therefore often used to evaluate the fairness of congestion control mechanisms Why are things more complex when users share different resources? For one, the ing rate of each flow in a ... Also, TCP is the main entity that realizes congestion control in the Inter-net – complementary AQM mechanisms are helpful but play a less crucial role in practice.Indeed, embedding congestion control

Ngày tải lên: 14/08/2014, 12:20

... start and congestion avoidance In the following section, we will see how they work. 3.4 TCP congestion control and reliability By describing two methods that limit the amount of data that TCP sends ... some of these updates did not directly influence the congestion control behaviour but only relate to reliability; yet, they are important pieces of the puzzle, which shows the dynamics ofmodern TCP ... network on the basis of end-to-end feedback, Van Jacobson added congestion control functionality to TCP (Jacobson 1988) This could perhaps be seen as the milestone that started off all theInternet-oriented

Ngày tải lên: 14/08/2014, 12:20

... Tennenhouse 1990) Congestion control implications of running TCP over ABR are a little more intricate.When TCP is used on top of ABR, a control loop is placed on top of another control loop.Adverse ... Realize congestion control that is fair towards TCP (TCP-friendly) but more priate for real-time multimedia applications appro-• Realize congestion control that is more efficient than standard TCP ... effectively divides an ABR connection into a number of separately controlled segments and turns ABR into some sort of a hop-by-hop congestion control scheme Thus, ATM ABR supports all the explicitfeedback

Ngày tải lên: 14/08/2014, 12:20

... control and quality of The main focus of congestion control and quality of service is service is data traffic data traffic . In congestion control we try to . In congestion control we try to ... Relay. Congestion Control in TCP Congestion Control in Frame Relay Topics discussed in this section: Topics discussed in this section: 24.16 In the congestion avoidance algorithm, the size of the congestion ... understand the concept of congestion To better understand the concept of congestion control, let us give two examples: one in TCP and the control, let us give two examples: one in TCP and the other...

Ngày tải lên: 06/03/2014, 12:20