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The Hidden Cost of Overhead in MIMO Wireless LANs

Multiple Input Multiple Output MIMO communication, enabled by the presence of multiple transmit and receive antennas in the communication link, is a physical layer technology that can improve throughput in WLANs. The cost of MIMO in terms of additional overhead, unfortunately, is often overlooked. Using representative physical and MAC models,...

Tags: Throughput, Overhead, MAC, MIMO, Workforce Management, Human Resources

White papers 2007-05-07

CDMA Channel Parameters Maximizing TCP Throughput

A single TCP session traversing a wireless channel is considered in this paper, with a constant SIgnal to Noise Ratio SINR at the receiver. The problem of determining the optimal transmission energy per bit is considered, to maximize TCP throughput. Specifically, in the case where direct sequence spread spectrum modulation...

Tags: Throughput, CDMA, TCP, Tcp/Ip, Networking

White papers 2007-01-01

Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN

As far as transfer reliability is concerned, the wireless segment of UTRAN is the weakest part of an Internet session. To overcome this imperfection, the RLC protocol features a link-level retransmission mechanism. This paper shows by analytical means and computer simulations that for a given Block Error Rate BLER, the...

Tags: Throughput, TCP, Tcp/Ip, Networking

White papers 2007-01-01

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

Congestion Control Mechanism of TCP for Achieving Predictable Throughput

The demand of Internet users for diversified services has increased due to the rapid development of the Internet, and applications requiring QoS guarantee, such as real-time media delivery services, have become popular. The research group has proposed transport-layer approaches to provide such high-level quality of network services. This paper proposes...

Tags: Throughput, Congestion, TCP, Tcp/Ip, Internet, Networking

White papers 2006-10-12

Throughput and Transmission Capacity of Ad Hoc Networks With Channel State Information

This paper develops a general framework for deriving the spatial throughput and transmission capacity of spatially Poisson distributed ad hoc networks for random (e.g., fading) channels, and random transmission distances. In both of these scenarios the randomness of the channels and ranges invariably lowers both throughput and transmission capacity assuming...

Tags: Channel, Advertisement, Throughput, Transmission Capacity, Networking

White papers 2006-07-05

Optimizing WAN Performance for the Global Enterprise

To enhance Wide Area Network WAN throughput, Intel IT conducted a Proof of Concept PoC study to investigate new WAN optimization technologies and products. This paper achieved significant benefits to WAN throughput in their test network and in a pilot production network using devices that incorporated a variety of optimization...

Tags: Throughput, Network, Intel Corp., WANs, Networking, Network Technology

White papers 2006-05-01

On Improving the Throughput of Media Delivery Applications in Heterogeneous Overlay Network

Overlay multicast is becoming increasingly popular for multimedia delivery over Internet. The available bandwidths between sender and different receivers are generally heterogeneous. This paper proposes a scheme to improve the throughput of a media delivery session with heterogeneous receivers by organizing the receivers into layered data distribution meshes and sending...

Tags: Bandwidth, Solution, Throughput, Network, Mesh

White papers 2006-03-16

TCP NewReno: Slow-But-Steady or Impatient?

This paper compares the throughputs of two different TCP NewReno variants, namely Slow-but-Steady and Impatient. 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 build upon prior work on...

Tags: Throughput, University Of Calgary, TCP, Tcp/Ip, Networking

White papers 2006-02-21

Joint PHY/MAC Based Link Adaptation for Wireless LANs With Multipath Fading

Wireless local area networks offer a range of transmitted data rates that are to be selected according to estimated channel conditions. However, due to packet overheads and contention times introduced by the CSMA/CA multiple access protocol, effective throughput is much less than the nominal data rates. Most multimedia applications use...

Tags: Throughput, Network, WLAN, Adaptation, Payload, Multipath, University Of California, LANs, Wireless LANs, Wi-Fi, Networking, Wireless

White papers 2006-01-18

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

Intel and S3 Accelerate Delivery of IP DSLAMs Needed for Triple Play

Telecom providers and IP DSLAM developers face the same issues. Flexibility is needed to allow for continuous introduction of features through software. High throughput is necessary to enable QoS in video services. Low cost is vital to ensure that triple play services can be delivered at a reasonable price point....

Tags: S3 Inc., Throughput, IP, Flexibility, Intel Corp., Telecom & Utilities, Telephony, Network Technology, Tools & Techniques, Telecommunications, Networking, Management

Case studies 2005-09-01

Create a path to reach your strategy

If you're having trouble getting your team to execute on its strategy then you may need to lay out the path in more detail than you already have. Here’s how. Many organizations find developing a strategy a difficult and time consuming process, one that they're so exhausted by...

Tags: Robert L. Bogue, strategy, SMB Strategies Newsletter, Throughput, Organization, Management

Technical articles 2005-08-22

Performance Evaluation of TCP in an Integrated WPAN and WLAN Environment

Short-range low power radio frequency systems such as Bluetooth and UWB enable the deployment of Wireless Personal Area Networks WPAN. A WPAN can interface to larger networks to provide broader network access and Internet connectivity. This paper evaluates the performance of TCP over an integrated WLAN and WPAN system using...

Tags: Throughput, Performance, Network, Radio Frequency, Window, WLAN, Performance Evaluation, TCP, Tcp/Ip, Construction, Wireless LANs, Wi-Fi, Bluetooth, LANs, Ultrawideband (UWB), Performance Management, Wireless, Networking, Human Resources, Workforce Management

White papers 2005-05-03

802.11 Wireless Networks - A Peek Ahead at 802.11n: MIMO OFDM

802.11 Task Group N TGn has an interesting goal. Most IEEE task groups focus on increasing the peak throughput, making data fly as fast as possible during the time it is being transmitted. TGn's goal is to achieve 100 Mbps net throughput, after subtracting all the overhead for protocol management...

Tags: IEEE 802.11, Throughput, Network, IEEE 802.11n, MIMO-OFDM, Mbps, Wireless Network, Task Group N, Wireless LANs, Wi-Fi, Wireless

Book chapters 2005-04-14

Queuing Delay and Achievable Throughput in Random Access Wireless Ad Hoc Networks

This paper focuses on characterizing the average end-to-end delay and maximum achievable per-node throughput in random access multihop wireless ad hoc networks with stationary nodes. The paper presents an analytical model that takes into account the number of nodes, the random packet arrival process, the extent of locality of traffic,...

Tags: Throughput, Microsoft Access, Network, Rensselaer Polytechnic Institute, Node, Networking, Wi-Fi, Wireless

White papers

Additional Resources

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...

Tags: Network, TCP, Formula Based Prediction, Tcp/Ip, Networking

White papers 2007-01-01

An Extension of the TCP Steady-State Throughput Equation for Parallel TCP Flows

Almost a decade after its publication in, the steady-state throughput equation of TCP by Padhye et al. remains the most widely used method for calculating the throughput that a TCP sender obtains under certain environment conditions. While there is now a wealth of other models available, many of which are...

Tags: TCP, Tcp/Ip, Networking

White papers 2007-06-27

Cisco PIX 501 Throughput

Hi All,Im looking for somewhere or someone that can give me accurate information about the throughput of a Cisco PIX 501. Cisco's site lists these specs as 60mbps clear txt and 3-6mbps for vpn traffic, depending on encryption, what i need to know is: if i have 2 or more...

Tags: Cisco Systems Inc., Cisco PIX 501, adam.aquilina@..., security, vpn, cisco, firewall, networking, pix, Cisco PIX Firewall

Discussion threads 2007-02-14

Throughput Unfairness in TCP Over WiFi

This paper presents a measurement study of TCP performance at an operational WiFi deployment. After presenting the network topology and the tools used to generate and analyze traffic, the throughput performance of competing TCP connections is examined. The paper investigates how throughput is divided among the participating wireless hosts with...

Tags: Strength, TCP, Wi-Fi, Tcp/Ip, Wireless LANs, Networking, Wireless

White papers 2005-11-07