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 TitleDate AddedCompany
whitepaper Control System for Internet Bandwidth Based on Java Technology2008-07-07 Journal of Theoretical and Applied Information Technology
  This paper presents a Java-based real-time Internet access estimation tool for Quality of Service (QoS) in Internet accesses for Multimedia applications (JEQoSIM). It is specially aimed for real-time multimedia applications which use the User Datagram Protocol (UDP). The system is capable of estimating access capacity, available bandwidth and delay as the critical end-to-end QoS parameters for this kind of applications. The algorithm used for QoS estimations is one-way, and is based on the packet train technique. Real-time QoS estimation elements are distributed among a central server and the Internet end user. The central server contains a UDP packet bursts server and a web server that hosts the Java applet that implements the UDP packet bursts client.

Tags: Network Management, Software Development Tools		   
whitepaper Achievable Bandwidth Estimation for Stations in Multi-Rate IEEE 802.11 WLAN Cells2008-06-18 Technical University of Catalonia
  This paper analyzes the effect of multi-rate transmissions in a CSMA wireless LAN environment. Observations in a real testbed showed that bandwidth resources (in Bytes/s) are shared fairly among all stations even though transmissions carried out at lower rates capture the medium for longer periods, which drastically reduces the overall throughput. The intrinsic concept of fairness in a CSMA scheme with multiple rates is quantified by means of a new formulation which is validated through simulations and practical measurements. The algorithm presented provides the maximum achievable bandwidth that can be offered to a given IEEE 802.11 station. Having this information has evident applications in real-time multimedia transmissions over WLANs.

Tags: Mobile and Wireless, Network Management		   
whitepaper Optimizing Campus Networks for Video2008-06-17 Cisco Systems
  For enterprise companies, digital video has quickly evolved from a novelty to a necessity, encompassing a wide range of applications, including desktop video, videoconferencing, digital signage, and video surveillance. For IT managers, this creates a new set of challenges. Video is much more sensitive to latency, jitter, and packet loss than other business applications. While adding bandwidth might help, this can be both expensive and inefficient. This webcast will reveal the technical steps users can take now to optimize the network to deliver high-quality video applications. The attendee will discover how to significantly improve the end-user experience without compromising the performance of the other mission-critical business applications.

Tags: Network Management, Network Technologies		   
whitepaper Improving VPN Performance Over Multiple Access Links2008-06-13 George Mason University
  To improve the performance of VPN connections the paper investigates how the bandwidth of multiple access links can be aggregated with inverse multiplexing to create a single, higher capacity logical communication link. But achieving the maximum possible aggregated TCP throughput becomes extremely challenging if the underlying links either use different technologies (e.g., DSL, cable modem) or suffer different or time-varying communication characteristics (e.g., available bandwidth, packet loss rate). To maximize VPN throughput they have constructed a system that combines two distinct innovations. This paper describes the system's implementation, the test environment built on Emulab, and shows that when access links form the communication bottleneck in the end-to-end connection that can significantly increase VPN performance over conventional approaches.

Tags: Network Technologies, LAN - WAN		   
whitepaper On Orthogonal Reduction to Hessenberg Form With Small Bandwidth2008-06-12 Academy of Sciences of the Czech Republic
  Numerous algorithms in numerical linear algebra are based on the reduction of a given matrix A to a more convenient form. One of the most useful types of such reduction is the orthogonal reduction to (upper) Hessenberg form. This reduction can be computed by the Arnoldi algorithm. When A is Hermitian, the resulting upper Hessenberg matrix is tridiagonal, which is a significant computational advantage. This paper studies necessary and sufficient conditions on A so that the orthogonal Hessenberg reduction yields a Hessenberg matrix with small bandwidth. This includes the orthogonal reduction to tridiagonal form as a special case. Orthogonality here is meant with respect to some given but unspecified inner product.

Tags: Software Development Tools		   
whitepaper A Two-Stage Plug-in Bandwidth Selection and Its Implementation for Covariance Estimation2008-06-01 Concordia University
  The two most popular bandwidth choice rules for kernel HAC estimation have been proposed by Andrews (1991) and Newey and West (1994). This paper suggests an alternative approach that estimates an unknown quantity in the optimal bandwidth for the HAC estimator (called normalized curvature) using a general class of kernels, and derives the optimal bandwidth that minimizes the asymptotic mean squared error of the estimator of normalized curvature. It is shown that the optimal bandwidth for the kernel-smoothed normalized curvature estimator should diverge at a slower rate than that of the HAC estimator using the same kernel.   
whitepaper Accelerating Mission-Critical Oracle Applications Throughout the Distributed Enterprise2008-06-01 Juniper Networks
  From Oracle E-Business Suite to PeopleSoft Enterprise, Siebel, JD Edwards EnterpriseOne, and JD Edwards World, Oracle offers a full complement of integrated business solutions that improve functional best practices, integrate Web services, provide predictive analysis and enable more flexible, collaborative business processes. Many businesses today rely on Oracle applications to support their ongoing business operations. However, globalization and server centralization create performance problems for remote and branch-office users accessing these applications over the WAN. The WX and WXC application acceleration platforms from Juniper Networks accelerate the performance of Oracle business applications over the WAN. Remote and branch-office users receive LAN-like response times, regardless of their location.

Tags: Network Management		   
whitepaper Rising to the High-bandwidth Demands of an Evolving Academia2008-06-01 Cisco Systems
  The University of Plymouth is one of the United Kingdom's most prominent universities. University of Plymouth wanted to support high-bandwidth research needs on demand and enable reliable collaboration and communications anywhere. The challenge was to keep pace with teaching innovations. The university chose to implement a Cisco solution that remained anchored by Cisco Catalyst 6500 Series switches at the core and that added Cisco Catalyst 3750-E and 3560-E Series switches, supporting unified messaging and wireless access, across its campus.

Tags: Network Management, Mobile and Wireless		   
whitepaper HP ProCurve Supports the High Octane World of International Marketing2008-06-01 Hewlett-Packard (HP)
  Japanese company, Dentsu, is one of the largest advertising agencies in the world. With 100 workers operating in three buildings in Brussels and 30 very demanding clients, it is imperative that Dentsu has a high performance network with the bandwidth and resilience to constantly transfer large packages of data, including the complex imagery that it works with on a daily basis. While it had experienced no particular problems with its previous network, Dentsu needed to upgrade from 100Mb to 1Gb capability. This was because the Apple computers it uses for design and rendering require 1Gb speed and also because Dentsu wanted to prepare for a possible Voice over Internet Protocol (VoIP) implementation. They chose HP ProCurve because of its unique combination of technical quality and reasonable price.

Tags: LAN - WAN, Network Management		   
whitepaper Using Bandwidth More Efficiently With Switched Digital Video2008-06-01 Motorola
  Switched Digital Video (SDV) offers tremendous promise for network operators seeking to more efficiently use bandwidth and deliver highly targeted content to subscribers. Motorola offers an end-to-end solution that allows cable operators to leverage their existing infrastructure to offer more channels and deliver a wide spectrum of niche programming to attract additional subscribers.

Tags: IT Infrastructure, Network Technologies