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- PDF-ShellTools (zip)
- PDF-ShellTools are Windows shell extensions to interact with pdf files directly from the Windows shell. This way we can do some interesting things to our pdf documents without the need to open them in Acrobat or another desktop pdf application.Right now, group these tools: PDF-InfoTip, PDF-InfoEdit,PDF-Anonymizer,PDF-Split and PDF-Merge. Version 1.0.0.9...
- Software downloads 2008-05-06
- Estimation of RTT and Bandwidth for Congestion Control Applications in Communication Networks
- Heterogeneous communication networks with their variety of application demands, uncertain time-varying traffic load, and mixture of wired and wireless links pose several challenging problem in modeling and control. This paper focuses on the Round-Trip Time RTT, which is a particularly important variable for efficient end-to-end congestion control, and on bandwidth...
- White papers 2007-08-04
- Observations on Round-Trip Times of TCP Connections
- Knowledge about properties of network traffic can be beneficial when studying network protocols. It enables realistic models of network traffic to be created and evaluations of current protocols to take place. This study examines trends in Round-Trip Times RTTs at a university Web server. Round-trip time is a particularly important...
- White papers 2006-07-28
Additional Resources
- Large-Scale RTT Measurements From an Operational UMTS/GPRS Network
- This paper presents some observations about TCP RTT as captured in the live traffic of an operational GPRS/UMTS network. RTT samples are extracted from traces collected by passive monitoring the Gn interfaces of one of the major providers in Austria, EU. The results are compared for GPRS and UMTS, and...
- White papers 2005-03-08
- The RTT Distribution of TCP Flows in the Internet and Its Impact on TCP-Based Flow Control
- It is well known that the performance of a TCP flow is affected by its Round-Trip Time RTT, i.e., the elapsed time between the instant a packet is released by the source to the instant the corresponding ack is received by the source. The distribution of RTTs can dramatically affect...
- White papers 2007-01-01
- CUBIC: A New TCP-Friendly High-Speed TCP Variant
- This paper presents a new TCP variant, called CUBIC, for high-speed network environments. CUBIC is an enhanced version of BIC: it simplifies the BIC window control and improves its TCP-friendliness and RTT-fairness. The window growth function of CUBIC is governed by a cubic function in terms of the elapsed time...
- White papers 2007-02-17
- TCP Libra: Exploring RTT-Fairness for TCP
- The majority of Internet traffic relies on the Transmission Control Protocol TCP devised in the early 1970s to provide a reliable data transfer across the ARPANET. Today's users download large multimedia files from remote servers using TCP. If these TCP sessions share the same bottleneck, they are expected to receive...
- White papers 2005-09-15
- Experimental Evaluation of TCP Protocols for High-Speed Networks
- In this paper we present experimental results evaluating the performance of the Scalable-TCP, HS-TCP, BIC-TCP, FAST-TCP and H-TCP proposals in a series of benchmark tests. In summary, we find that both Scalable-TCP and FAST-TCP consistently exhibit substantial unfairness, even when competing flows share identical network path characteristics. Scalable-TCP, HS-TCP, FAST-TCP...
- White papers 2006-08-31
- An Adaptive End-to-End Loss Differentiation Scheme for TCP Over Wired/Wireless Networks
- This paper proposes a robust end-to-end loss differentiation scheme to identify the packet losses due to congestion for TCP connections over wired/wireless networks. The paper uses the measured RTT values in determining whether the cause of packet loss is due to congestion over wired path or regular bit errors over...
- White papers 2007-03-01
- New Methods for Passive Estimation of TCP Round-Trip Times
- This paper proposes two methods to passively measure and monitor changes in Round-Trip Times RTTs throughout the lifetime of a TCP connection. The first method associates data segments with the ACKnowledgments ACKs that trigger them by leveraging the TCP timestamp option. The second method infers TCP RTT by observing the...
- White papers 2007-01-01
- TCP-Based Video Streaming Using Receiver-Driven Bandwidth Sharing
- This paper establishes the benefits of the proposed approach over standard TCP through Internet experiments involving a prototype for the Linux operating system. Furthermore, the paper demonstrates scenarios in which a client using the bandwidth control system may actually obtain better performance than TCP-friendly UDP streaming protocols. This causes the...
- White papers 2007-01-01
- TCP Synchronisation Effect in TCP New Reno and TCP Hybla
- Due to the nature of the TCP protocol, it is possible a number of flows are synchronising with each other. This means that flows influence each other in such a way that possibly one flow benefits from the synchronisation by claiming a large share of capacity, while other flow is...
- White papers 2005-08-30
- Efficient Data Transport in Wireless Overlay Networks
- Performance evaluation of GPRS is an active research area. TCP performance, buffering, scheduling, and quality of service were studied through analytical analysis and simulation. The study describes excessive buffering in the GPRS network that results in unfair sharing of bandwidth between several TCP flows. The paper presents a transparent proxy...
- White papers 2004-02-01
- Optimizing TCP Retransmission Timeout
- Delay spikes on Internet paths can cause spurious TCP timeouts leading to significant throughput degradation. However, if TCP is too slow to detect that a retransmission is necessary, it can stay idle for a long time instead of transmitting. The goal is to find a Retransmission Timeout RTO value that...
- White papers 2005-02-05
- A Stochastic Model for Short-Lived TCP Flows
- Internet has become an important part of daily life, in which the most commonly used applications such as world wide web, usenet news, file transfer and remote login have all opted for TCP as their transport medium. This paper proposes a new model for the slow-start phase based on the...
- White papers 2007-01-01
- Modeling the AIADD Paradigm in Networks With Variable Delays
- Modeling TCP is fundamental for understanding Internet behavior. The reason is that TCP is responsible for carrying a huge quota of the Internet traffic. During last decade many analytical models have attempted to capture dynamics and steady-state behavior of standard TCP congestion control algorithms. In particular, models proposed in literature...
- White papers 2006-10-13
- LTCP: Improving the Performance of TCP in Highspeed Networks
- This paper proposes Layered TCP LTCP for short, a set of simple modifications to the congestion window response of TCP to make it more scalable in highspeed networks. LTCP modifies the TCP flow to behave as a collection of virtual flows to achieve more efficient bandwidth probing. The number of...
- White papers 2005-11-28
- The Origin of TCP Traffic Burstiness in Short Time Scales
- Internet traffic exhibits multifaceted burstiness and correlation structure over a wide span of time scales. This paper focuses on shorter scales, typically less than 100-1000 milliseconds. The objective is to identify the actual mechanisms that are mostly responsible for creating bursty traffic in those scales. It shows that TCP self-clocking,...
- White papers 2007-01-01
- Geolocation in Ad Hoc Networks Using DS-CDMA and Generalized Successive Interference Cancellation
- Channel estimation and distributed positioning algorithms are presented for geolocation in a wireless ad hoc network. The network uses a direct-sequence code-division multiple-access- based handshaking protocol, in which nodes receive multiple acknowledgment packets in response to a request-to-send waveform. Round-trip Travel Time RTT and Angle-Of-Arrival AOA measurements are obtained using...
- White papers 2005-05-01
- On the Predictability of Large Transfer TCP Throughput
- With the advent of overlay and peer-to-peer networks, Grid computing, and CDNs, network performance prediction becomes an essential task. Predicting the throughput of large TCP transfers, in particular, has attracted much attention. This paper focuses on the design, empirical evaluation, and analysis of TCP throughput predictors for a broad class...
- White papers 2007-01-01
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