north carolina state university

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Optimal Granularity of MPLS Tunnels

This paper considers the problem of tunneling MPLS Label Switched Paths LSPs over an optical network in which â-channels lightpaths of a fixed capacity are the main mechanism of transport. While any set of LSPs, each LSP having an arbitrary rate, can be tunneled over a given â-channel as long...

Tags: Set, MPLS, North Carolina State University, Network Technology, Networking, Development Tools, Software Development, Software/Web Development

White papers 2008-01-01

Measuring Bandwidth Signatures of Network Paths

This paper proposes a practical and efficient technique, Forecaster, to estimate the end-to-end available bandwidth, and the speed of the most congested tight link along an Internet path. Forecaster is practical since it does not assume any a priori knowledge about the measured path, does not make any simplifying assumptions...

Tags: Network, North Carolina State University, Path, Forecaster, Internet, Productivity, Networking

White papers 2007-02-27

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...

Tags: Window, TCP, North Carolina State University, CUBIC, Tcp/Ip, Construction, Networking

White papers 2007-02-17

Impact of Background Traffic on Performance of High-Speed TCP Variant Protocols

This paper examines the effect of background traffic on the performance of existing high-speed TCP variant protocols, namely BIC-TCP, CUBIC, FAST, HSTCP, H-TCP and Scalable TCP. It also demonstrates that the stability, link utilization, convergence speed and fairness of the protocols are clearly affected by the variability of flow sizes...

Tags: Performance, North Carolina State University, Performance Management, Tcp/Ip, Routers & Switches, Networking, Human Resources, Workforce Management

White papers 2006-11-29

Achieving 100% Throughput in TCP/AQM Under Aggressive Packet Marking With Small Buffer

This paper investigates the performance of TCP/AQM systems with ECN marks under the aggressive scale for packet marking and a buffer of size smaller than O(?N). Under such a scale, the paper demonstrates that randomness both in packet arrivals and in packet marking must be taken into account and developed...

Tags: Packet, Buffer, North Carolina State University, Performance Management, Human Resources, Workforce Management

White papers 2006-08-01

Feasibility of Adaptive Transmission for Multicarrier and Frequency Hopping Mobile Radio Systems

This paper addresses feasibility of adaptive transmission for rapidly varying fading channels encountered in mobile communication systems. Due to rapid channel variations and the feedback delay, implementation of adaptive transmission in these channels requires accurate prediction of future channel conditions. The paper describes the design and performance of adaptive transmission...

Tags: Mobile, Radio, Mobile Communication, North Carolina State University, Feasibility, Advertising & Promotion, OFDM, Engineering, Cellular Phones, Marketing, Wireless, Consumer Electronics, Personal Technology

White papers 2006-05-31

Performance Modeling of TCP/AQM With Generalized AIMD Under Intermediate Buffer Sizes

TCP is the dominant transport protocol to carry most of Internet data traffic, e.g., email, FTP, P2P. Each TCP source just iterates its own congestion control algorithm to respond to the congestion signal generated by AQM Active Queue Management schemes in the network. So, TCP/AQM is essentially a distributed, close-loop...

Tags: Performance, Congestion, TCP, North Carolina State University, Tcp/Ip, Engineering, Networking

White papers 2005-10-11

OpenSeminar: A Web-Based Collaboration Tool for Open Educational Resources

It is common for university instructors to compile links to online resources for the courses they teach, either as a supplement to a textbook, reading packet or, in some cases, as a replacement. Finding resources and keeping them up to date is time consuming. Instructors who teach similar subjects at...

Tags: Web-based Collaboration, North Carolina State University, Resource, Productivity

White papers 2005-09-28

Performance Analysis of Tomlinson-Harashima Multiuser Precoding in Multipath CDMA Channels

Tomlinson-Harashima multiuser precoding THP is a transmitter Tx-based multiple access interference MAI cancellation technique for Direct Sequence DS Code-Division Multiple Access CDMA systems. This zero forcing ZF-based transmitter precoding method minimizes the mean square error at the receiver. It is suitable for the downlink since the receiver is as simple...

Tags: Technique, Performance, CDMA, Transmitter, North Carolina State University, Productivity, Cellular Phones, Consumer Electronics, Personal Technology

White papers 2005-05-06

Using In-Process Testing Metrics to Estimate Software Reliability: A Feasibility Study

In industry, information on field reliability of a product becomes available too late in the software development process to affordably guide any corrective actions. A step towards remediation of this problem lies in the ability to provide an early estimation of software reliability. This paper presents a suite of in-process...

Tags: Software, North Carolina State University, Tools & Techniques, Management

White papers 2004-09-24

Firewall Design Principles

A network security domain is a contiguous region of a network that operates under a single, uniform security policy. Whenever domains intersect, there is a potential need for security to control traffic allowed into the network. Firewall technology can be used to filter this traffic. The most common boundary where...

Tags: Network, North Carolina State University, Network Security Domain, Firewalls, Network Security, Networking, Security

White papers 2004-04-06

Additional Resources

Girls are as smart as boys, but tests are getting dumber

New research published in the journal Science confirms what all of us teachers have known for a long time: girls are just as smart as boys. I hope none of our tax dollars went into that one. A quick quote from the article before I get into the...

Tags: Test, Teacher, Hyde, Taxes, Free Trade, Financial Planning, Finance, Christopher Dawson

Blog posts 2008-07-25

Geek Sheet: A Tweaker's Guide to Solid State Drives (SSDs) and Linux

Is 20th century conventional Winchester multi-platter, multi-head random-access disk technology too quaint for you? Want to run your PC or server on storage devices that consume far less energy than the traditional alternatives? Want a portable or mobile storage unit that will never fail due to G-forces or "crashing?". Looking...

Tags: Linux, Disk, File System, Solid State Disk, Mandrake, Jason Perlow

Blog posts 2008-07-25

The future of tech IPOs

At the AlwaysOn Summit at Stanford University, Frank Quattrone, co-founder of Qatalyst, talks about the dismal condition of the current IPO market, why venture capitalist backed companies are not going public right now, and what the future holds.

Tags: IPO, Financial Planning, Investment, Venture Capital, Financial Services, Finance, Financing Startups, Tech IPOs

Videos 2008-07-25

Crucial (Micron) Solid State Drives

Crucial Micron Solid State Drive installation and configuration by Jason Perlow

Tags: Micron Technology Inc., Solid State Disk, Jason Perlow, flash memory, micron, crucial, ssd, solid state drive

Image galleries 2008-07-25

Mystery solved: Apple's new product is iTablet (updated)

Previously I speculated about the mysterious "product transition" that Apple's Peter Oppenheimer CFO mentioned no less than seven times in the Q3 2008 Earnings conference call with analysts. Some of his quotes from the call: We are working to develop new products that contains technologies...

Tags: Apple Inc., Tablets, Notebooks, Hardware, Notebooks & Tablets, Jason D. O\'Grady

Blog posts 2008-07-25

How OpenDNS, PowerDNS and MaraDNS remained unaffected by the DNS cache poisoning vulnerability

The short answer is being paranoid about tackling a known vulnerability. It's 2001, and Daniel J. Bernstein DJB, author of the then popular djbdns security-aware DNS implementation, is applying basic math principles to raise awareness on what's to turn into the "sky is falling" critical Internet vulnerability in 2008, in...

Tags: DNS, Vulnerability, Anomaly, Attack, OpenDNS, MaraDNS, NSS, Domain Names, Networking, Internet, Dancho Danchev

Blog posts 2008-07-25

Click fraud in 2nd quarter of 2008 more sophisticated, botnets to blame

Whereas the overall click fraud rate isn't increasing, it's not decreasing either, remaining flat for the first two quarters of 2008, according to data gathered from the Click Fraud Network, consisting of more than 4,000 online advertisers and agencies. Click Forensics report for the second quarter of 2008, indicates that...

Tags: Click Fraud, RK West, Dancho Danchev

Blog posts 2008-07-25

10 essential gadgets for students

I chose these from personal experience, but also from asking many friends from around the world who are involved in technology and study at the same time. Some gadgets come with a recommendation, whereas others don't; things like laptops and cell phones can't be selected for everybody, it'd be ridiculous...

Tags: Headphone, Phone, Cell Phone, Laptop Computer, Lecture, Notebooks, Telecom & Utilities, Hardware, Notebooks & Tablets, Zack Whittaker

Blog posts 2008-07-25

10 essential gadgets for students

Showing you some of the gadgets college and university students really shouldn't live without. by Zack Whittaker

Tags: Student, Zack Whittaker, Gadgets, University, Pen drive, Cell phone, Laptop, Computer

Image galleries 2008-07-25