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Packet Loss In TCP Hybrid Wireless Networks
White Papers The reason is that such networks exhibit both a high latency and a high packet loss, a combination that stresses TCP's congestion avoidance algorithm. Accurate modelling of the packet loss process in such networks is not an easy task, so very...
[December 26, 2007, 23:00]
The Effects Of Systemic Packet Loss On Aggregate TCP Flows
White Papers This paper considers the impact of systemic non-congestion related packet loss on the effectiveness, fairness, and efficiency of parallel TCP transmissions. The use of parallel TCP connections to increase throughput for bulk transfers is common...
[December 6, 2007, 23:00]
Handoff Loss Detection With E-TCP
White Papers One of the problems affecting TCP performance is packet loss, which can cause significant degradation of TCP performance over wireless network. In an earlier study, authors have proposed an enhancement to TCP that allows TCP to differentiate...
[December 6, 2007, 23:00]
TCP Throughput Analysis With Variable Packet Loss Probability For Improving Fairness Among Long/Short-Lived TCP Connections
White Papers For realizing it, the paper first introduces a new analysis approach to estimate the throughput of TCP connections when the packet loss probability of each transmitted packet from the same connection is different.
[December 5, 2007, 23:00]
Achieving Loss Isolation For TCP Over Multiple Wireless Interfaces
White Papers With the advent of mobile technology, there has been significant increase in the usage of TCP over wireless links. But owing to the limited bandwidth of the present day mobile networks, it has become very expensive for most of the applications.
[January 14, 2008, 23:00]
Sizing DropTail Queues For Heterogeneous TCP Sources Experiencing Periodic Loss
White Papers This paper analyzes droptail buffers for TCP networks with heterogeneous sources. The paper provides a new buffer-sizing rule which is linearly decreasing with the number of sources and which also depends on the range of round-trip times.
[October 30, 2007, 23:00]
Freeze TCP With Timestamps For Fast Packet Loss Recovery After Disconnections
White Papers TCP optimization for wireless networks, for dealing with packet losses and disconnections due to fading, shadowing and handoffs, ideally should maintain TCP end-to-end semantics with minimal dependence on intermediate nodes.
[December 6, 2007, 23:00]
An Analytic Throughput Model For TCP NewReno
White Papers This paper develops a simple and accurate stochastic model for the steady-state throughput of a TCP NewReno bulk data transfer as a function of round-trip time and loss rate. Third, the model is formulated using a flexible two-parameter loss model...
[December 26, 2007, 23:00]
Modeling The Throughput Of TCP Vegas
White Papers Previous analytic models of TCP Vegas throughput have been developed for loss-free (all-Vegas) networks. This work develops a simple and accurate analytic model for the throughput of a TCP Vegas bulk transfer in the presence of packet loss, as a...
[January 14, 2008, 23:00]
TCP NewReno: Slow-But-Steady Or Impatient?
White Papers The paper develops analytic throughput models of these variants as a function of round-trip time, loss event rate, and the burstiness of packet drops within a loss event. The models accurately predict the steady-state NewReno throughput for a wide...
[December 26, 2007, 23:00]
End-to-End Reliability In UMTS: TCP Over ARQ
White Papers The focus of this paper is end-to-end reliable transmission in UMTS environment where TCP, a reliable transport protocol designed to retransmit information in case of loss, is present at the mobile station as well as the wired portion of the network.
[January 14, 2008, 23:00]
RR-TCP: A Reordering-Robust TCP With DSACK
White Papers TCP performs poorly on paths that reorder packets significantly, where it misinterprets out-of-order delivery as packet loss. The sender responds with a fast retransmit though no actual loss has occurred.
[December 6, 2007, 23:00]
Improving The Performance Of Interactive TCP Applications Using Service Differentiation
White Papers Indeed, congestion-induced queuing and packet loss can be a significant cause of large delays and variability, thereby decreasing user-perceived quality. First, it look into application-based marking, and show how the protection of Telnet traffic...
[January 14, 2008, 23:00]
TCP-DCR: Making TCP Robust To Non-Congestion Events
White Papers The strength of TCP lies in the fact that it tries to mitigate congestion in the network by reducing the sending rate in response to loss of packets. Historically, using packet loss as a measure for perceiving congestion has worked quite well.
[January 14, 2008, 23:00]
On Making TCP More Robust To Packet Reordering
White Papers Reordering can cause performance problems for TCP's fast retransmission algorithm, which uses the arrival of duplicate acknowledgments to detect segment loss. Duplicate acknowledgments can be caused by the loss of a segment or by the reordering of...
[January 14, 2008, 23:00]
Measured TCP Performance In CDMA 1x EV-DO Network
White Papers In this experiment, it was shown that average TCP throughputs over downlink/uplink are 572.5/94.7Kbps and the average packet loss rates of 1x EV-DO downlink/uplink are 0.2/4.7%. Although the packet loss rate is low, bursty packet losses frequently...
[January 8, 2008, 23:00]
Wireless TCP Enhancements Using Multi-Level ECN
White Papers To enhance the performance of the TCP in the wireless domain, one needs to differentiate the 'congestion loss' from the 'Wireless loss'. One such urgent problem is the poor performance of TCP over wireless links.
[October 31, 2007, 23:00]
LDA+ TCP-Friendly Adaptation: A Measurement And Comparison Study
White Papers LDA+ uses the Real-time Transport Protocol (RTP) for collecting loss and delay statistics which are then used for adjusting the transmission behavior of the senders in a manner similar to TCP connections suffering from equal losses and delays.
[December 20, 2007, 23:00]
Performance Of TCP On Low-Bandwidth Wireless Links With Delay Spikes
White Papers Validation by ns2 simulations shows excellent agreement for lossless scenarios and good accuracy for moderate loss scenarios (for packet loss probabilities less than 5%). This paper models the goodput of a single TCP source on a wireless link...
[December 26, 2007, 23:00]
TCP Implementations And False Time Out Detection In OBS Networks
White Papers All three TCP implementations react to a Time Out (TO) loss in the same way (i.e.using Slow Start). This paper compares Reno, New-Reno and Selective Acknowledgements (SACK), the three most common TCP implementations today in (future) optical burst...
[January 14, 2008, 23:00]
