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- Root Cause Analysis for Long-Lived TCP Connections
- While the applications using the Internet have changed over time, TCP is still the dominating transport protocol that carries over 90% of the total traffic. Throughput is the key performance metric for long TCP connections. The achieved throughput results from the aggregate effects of the network path, the parameters of...
- Tags: Throughput, TCP, Analysis, Tcp/Ip, Networking
- White papers 2005-10-27
- Reasons Not to Parallelize TCP Connections for Long Fat Networks
- For utilizing long fat networks effectively, parallel TCP was proposed, and has been employed. However, as high-speed transport-layer protocols appear, it is necessary to reinvestigate the performance of parallel TCP. This paper uses mathematical analysis to explore its performance. Analysis results show that the open issue of choosing the number...
- Tags: Network, TCP, Tcp/Ip, Networking
- White papers 2006-06-01
- Modeling TCP Performance With Proxies
- This paper investigates the TCP dynamics and performance over proxies that shorten the TCP feedback loop by segmenting the end-to-end connection. Such proxies are often used to improve TCP performance, e.g., a splitting/spoofing proxy in the satellite communication, and more commonly, a web cache. By analysis, the author's attempts to...
- Tags: Proxy, TCP, Modeling, Tcp/Ip, Networking
- White papers 2007-01-01
- Measuring IP and TCP Behavior With Tstat
- Field measurements have always been the starting point for networks planning and dimensioning; however, their statistical analysis beyond simple traffic volume estimation is not so common. This paper presents and discusses Tstat, a new tool for the collection and statistical analysis of TCP/IP traffic that is able to infer TCP...
- Tags: Performance, Statistical Analysis, IP, TCP, Tcp/Ip, Performance Management, Networking, Network Technology, Human Resources, Workforce Management
- White papers 2007-01-01
- An Analysis of TCP Through Simulation
- This paper is an analysis of TCP and its variations through the use of simulations. The NS-2 network simulator was used to help understand the behaviors and characteristics of TCP variants. Two different experiments were set forth. The first varied different load conditions; the second varied queuing algorithms. The TCP...
- Tags: TCP, Analysis, Tcp/Ip, Networking
- White papers 2006-10-28
- Stochastic Differential Equation Modeling and Analysis of TCP-Windowsize Behavior
- This paper presents new modeling and analysis technique for characterizing the steady state performance of a TCP flow. It invert the loss process in this model; by treating loss events arriving at the sour source as a Poisson stream rather than pack packets going out on the network with some...
- Tags: Technique, TCP, Analysis, Modeling, Tcp/Ip, Research & Development, Networking, Business Operations
- White papers 2006-02-18
- A Large-Scale, Passive Analysis of End-to-End TCP Performance Over GPRS
- In this paper a passive methodology for TCP performance evaluation over General Packet Radio Service GPRS networks is presented that relies on traffic monitoring at the GPRS ingress/egress router interface Gi. Based on the IP and TCP headers of the packets, the end-to-end performance of TCP connections is estimated such...
- Tags: GPRS, TCP, Analysis, Tcp/Ip, Networking, Cellular Phones, Consumer Electronics, Personal Technology
- White papers 2004-02-03
- Modeling Scalable TCP Friendliness to NewReno TCP
- Scalable TCP is a simple change to the traditional TCP congestion control algorithm which dramatically improves TCP performance in high speed wide area networks. The focus of this contribution is to model the performance of Scalable TCP algorithm sharing bottleneck link with a NewReno TCP. The analysis is performed during...
- Tags: Congestion, TCP, Analysis, Modeling, Scalable TCP, Tcp/Ip, Networking
- White papers 2007-03-01
- Performance Analysis of Large-Scale IP Networks Considering TCP Traffic
- This paper proposes a novel analysis method for large-scale networks with consideration of the behavior of the congestion control mechanism of TCP. In the analysis, the paper models the behavior of TCP at end-host and network link as an independent system, and combines them into a single system in order...
- Tags: Performance, Network, IP, TCP, IP Network, Analysis, Tcp/Ip, Networking
- White papers 2006-02-09
- Multi-Layer Analysis of Web Browsing Performance for Wireless PDAs
- This paper studies the user-level and network-level performance for a mobile client browsing the Web using a wireless Personal Digital Assistant PDA. A wireless network analyzer is used to collect traces of the TCP/IP network traffic generated to and from the wireless PDA. Multi-layer protocol analysis is used to assess...
- Tags: Web, Performance, Wireless PDA, Analysis, Wireless Network Analyzer, Protocol Analysis, PDAs, Performance Management, Wi-Fi, Wireless, Handhelds, Hardware, Human Resources, Workforce Management
- White papers
- Is Tampered-TCP Really Effective for Getting Higher Throughput in the Internet?
- This paper examines the effectiveness of tampered-TCP whose congestion control mechanism has been modified by malicious users for higher than the normal TCP throughput. This paper focuses on a tampered-TCP in which the increase and decrease ratio of the congestion window size were changed during the congestion avoidance phase. The...
- Tags: Throughput, Internet, Congestion, TCP, Tcp/Ip, Networking
- White papers 2006-10-19
- Use of TCP Decoupling in Improving TCP Performance Over Wireless Networks
- This paper proposes using the TCP decoupling approach to improve a TCP connection's goodput over wireless networks. The performance improvement can be analytically shown to be proportional to MTU=HP Sz, where MTU is the maximum transmission unit of participating wireless links and HP Sz is the size of a packet...
- Tags: Network, TCP, Wireless Network, Tcp/Ip, Networking, Wireless
- White papers 2001-05-20
- User-Level Performance in WLAN Hotspots
- This paper presents a novel performance analysis of the downlink of WLANs carrying TCP traffic. The paper first provide a packet level analysis that accounts not only for the interaction between TCP and the IEEE 802.11 MAC protocol, but also for the different radio conditions experienced by various users. It...
- Tags: Radio, WLAN, France Telecom, TCP, Analysis, Tcp/Ip, Wireless LANs, LANs, Performance Management, Wi-Fi, Wireless, Networking, Human Resources, Workforce Management
- White papers 2007-01-01
- TCP Performance Evaluation Over AODV and DSDV in RW and SN Mobility Models
- This paper presents evaluation and comparison of the TCP performance in different mobile scenarios generated by Random Waypoint RW and Social Network SN mobility models. TCP performance in SN mobility is discussed for the first time. The impact of AODV and DSDV routing protocols on the TCP goodput, delay and...
- Tags: Performance, Mobility, TCP, Tcp/Ip, Performance Management, Networking, Human Resources, Workforce Management
- White papers 2006-02-20
- Cross-Layer Analysis of TCP Performance in a 4G System
- This paper presents results from an experimental study of TCP in a wireless 4G evaluation system. Test-bed results on transport layer performance are presented and analyzed in relation to several link layer aspects. The aspects investigated are the impact of channel prediction errors, channel scheduling, delay, and adaptive modulation switch...
- Tags: 4G, TCP, Tcp/Ip, Networking
- White papers 2007-08-31
- A Uni?ed Framework for Modeling TCP-Vegas, TCP-SACK, and TCP-Reno
- This paper presents a general analytical framework for the modeling and analysis of TCP variations. The framework allows the modeling of multiple variations of TCP, including TCP-Vegas, TCP-SACK, and TCP-Reno, under general network situations. In particular, the framework allows us to propose the first analytical model of TCP-Vegas for arbitrary...
- Tags: TCP, Framework, Modeling, Tcp/Ip, Research & Development, Networking, Business Operations
- White papers 2007-10-22
- 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...
- Tags: Performance, Network, GPRS, TCP, Wireless, Tcp/Ip, Cellular Phones, Performance Management, Networking, Consumer Electronics, Personal Technology, Human Resources, Workforce Management
- White papers 2004-02-01
- Analysis of a Window-Based Flow Control Mechanism Based on TCP Vegas in Heterogeneous Network Environment
- Another version of TCP called TCP Vegas has been proposed and studied in the literature. It can achieve better performance than the current TCP Reno. In the previous studies, steady-state behavior of a window-based flow control mechanism based on TCP Vegas has been analyzed for a simple network topology. This...
- Tags: Network, Window, TCP, Analysis, Tcp/Ip, Networking
- White papers 2007-11-16
- UW/EE Technical Report: Performance Modelling of TCP Enhancements in Terrestrial-Satellite Hybrid Networks
- This paper focuses on the performance of TCP enhancements for a hybrid terrestrial satellite network. While a large body of literature exists regarding modeling TCP performance for the wired Internet, and recently over a single-hop wireless link, the literature is very sparse on TCP analysis over a hybrid wired-wireless (multi-hop)...
- Tags: Performance, TCP, Tcp/Ip, Networking
- White papers 2005-02-22
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