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Mission Statement
TechRepublic's ITPapers is the Web's largest library of free technical IT white papers, webcasts, and case studies. Covering IT categories including Data Management, IT Management, Networking, Communications, Enterprise Applications, Storage, Security and much more, TechRepublic's White Paper Directory is the best source for technical white papers and IT information.
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White Papers
Sap Businessobjects EDGE BI With Data Integration: The Preferred Choice for Growing Companies
May 2010
SA P BusinessObjects Edge Business Intelligence (BI) software is the business intelligence choice of midsize companies that want to improve business processes, discover new opportunities, and gain...
Provided by SAP
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White Papers
Disparate Systems, Disparate Data: Integration, Interfaces, and Standards in Emergency Medicine Information Technology
Aug 2008
As part of the broader informatics consensus initiative sponsored by Academic Emergency Medicine, this report addresses the issues of integration, interfaces, and data standards and how they are...
Provided by University of Utah
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White Papers
Dipper: A Data Integration with Privacy Protection Environment
Mar 2009
This paper develops Dipper, data integration with privacy protection environment, aiming to tackle the following challenges. Firstly, records can be matched albeit typographical differences...
Provided by Mahidol University
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White Papers
Data Integration With Uncertainty
Oct 2008
This paper reports the first set of results on managing uncertainty in data integration. Authors posit that data integration systems need to handle uncertainty at three levels and do so in a...
Provided by Springer-Verlag Italia S.r.l.
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White Papers
Preserving Privacy and Fairness in Peer-to-Peer Data Integration
Jun 2010
Peer-to-peer data integration - a.k.a. Peer Data Management Systems (PDMSs) - promises to extend the classical data integration approach to the Internet scale. Unfortunately, some challenges...
Provided by Association for Computing Machinery
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White Papers
Multi-Dimensional Geospatial Data Integration for Coastal Change Analysis
Jun 2008
Coastal change analysis, particularly of the variation in shorelines and blufflines, is critical for coastal disaster mitigation, environmental protection, resource management, and coastal...
Provided by Ohio State University
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White Papers
On-the-fly Data Integration for Personalized Television Recommender Systems
May 2008
In this paper authors present the iFanzy demonstrator, which aims at offering users television content in a personalized and context-sensitive way. With iFanzy authors integrate different volatile...
Provided by Technical University of Eindhoven
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White Papers
The PLIB Ontology-Based Approach to Data Integration
Oct 2009
The semantic heterogeneity has been identified as the most challenging issue of data integration since it requires understanding the relationship between data and real world objects to be able to...
Provided by ENSMA
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White Papers
Data Integration, Pathway Analysis and Mining for Systems Biology
May 2010
Post-genomic molecular biology embodies high-throughput experimental techniques and hence is a data-rich field. The goal of this paper is to develop bioinformatics methods to utilize publicly...
Provided by VTT
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White Papers
Ethernet Over Plastic Optical Fibre
Jul 2008
Plastic Optical Fiber, or POF as it is commonly referred to, has emerged as a low cost alternative to traditional copper cabling in office, home and automotive networks. Continued growth for POF...
Provided by Micrel
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White Papers
Optical Fiber Connector Types and Termination Technologies: Making the Right Choice for Your Installation
Jan 2009
Selecting the right connector for needs can be complicated by the many choices available today. Choosing the best fiber optic connector for any installation will have an impact on how efficient...
Provided by Tyco Electronics
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White Papers
Fiber-Optic Sensing: A Historical Perspective
May 2008
Sensing via fiber optics has occupied R&D groups for over 40 years, and some important transitions into the commercial sector have been achieved. The authors look at the fundamental concepts...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Two Revolutionary Optical Technologies
Oct 2009
During recent years, information technology has revolutionized the daily life. This is to a large part due to the development of electronic and optical devices and systems. The first ideas of...
Provided by University of Louisville
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White Papers
Optical Antenna Arrays on a Fiber Facet for in Situ Surface-Enhanced Raman Scattering Detection
Feb 2009
This paper reports a bidirectional fiber optic probe for the detection of Srface-Ehanced Raman scattering (SERS). One facet of the probe features an array of gold optical antennas designed to...
Provided by American Chemical Society
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White Papers
Optical Fibre Technologies and Radio Over Fibre Strategic Research for Future Networks
Feb 2010
Wireless communication is entering a new phase where the focus is shifting from voice to multimedia services. Present consumers are no longer interested in the underlying technology; they simply...
Provided by Brunel University
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White Papers
Pyridine Vapors Detection by an Optical Fibre Sensor
Feb 2008
An optical fiber sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in color from...
Provided by Molecular Diversity Preservation International (MDPI)
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Whitepapers
A Theoretical Model of the Effects of Losses and Delays on the Performance of SIP
Oct 2008
The Session Initiation Protocol (SIP) is widely used for VoIP communication. Losses caused by network or server overload would cause retransmissions and delays in the session establishment and...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Wavelet-Based Traffic Analysis for Identifying Video Streams Over Broadband Networks
Oct 2008
Network and service providers are rapidly deploying IPTV networks to deliver a wide variety of video content to subscribers. Some video content may be protected by copyright and/or may be subject...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Thirty Days to Customer Data Integration: Superior Results Today, a Strategic Foundation for Your Future
Apr 2009
Many businesses urgently are pursuing customer-centric strategies as a cornerstone for maintaining economic health. Most of them still lack the necessary customer data management resources....
Provided by Experian
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White Papers
Beyond MOS - Ensuring VoIP Service Quality
Jun 2010
As VoIP traffic continues to climb, CSPs are faced with the challenge of ensuring VoIP call quality. Monitoring of real-time VoIP services is complex, and existing IP network management solutions...
Provided by Stratecast
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White Papers
VoIP and Quality, a System, Not a Product?
May 2008
In its simplest, VoIP is the transmission of voice communications over any data network utilizing the TCP/IP protocol, including the Internet. VoIP is here to stay. It's not some flashy,...
Provided by Netlink Technologies
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White Papers
Maintaining the Edge: Voice Quality Management in a VoIP Environment
Apr 2008
The migration to next-generation IP networks has been a gradual one, as carriers have balanced new service deployment with the reality that the IP world lacked comprehensive and cost-effective...
Provided by Data Connection
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White Papers
The Design of VoIP Systems With High Perceptual Conversational Quality
Dec 2008
This paper describes the work on real-time two-party and multi-party VoIP (voice-over-IP) systems that can achieve high perceptual conversational quality. It focuses on the fundamental...
Provided by University of Illinois
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White Papers
Implementing VoIP?: Cover the Bases
Feb 2009
Convergence of voice and data networks, in the first instance by implementing a VoIP telephony system, is gaining huge momentum in the marketplace. For example, the telecoms research company,...
Provided by MorganDoyle
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White Papers
A Realisitic VoIP Traffic Generation and Evaluation Tool for OMNeT++
Mar 2008
The fraction of voice over Internet Protocol (VoIP) based telephone calls among the totality of voice based communication acts has been significantly growing during the last years. In wired, as...
Provided by Association for Computing Machinery
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White Papers
Detailed Analysis of Skype Traffic
Jan 2009
Skype is beyond any doubt the VoIP application in the current Internet application spectrum. Its amazing success has drawn the attention of telecom operators and the research community, both...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Towards Secure SIP Signalling Service for VoIP Applications
May 2009
Current Voice over IP (VoIP) services are regarded less secure than the traditional Public Switched Telephone Network (PSTN). This is due to the fact that VoIP services are frequently deployed in...
Provided by Karlstad University
-
White Papers
D(e|i)aling With VoIP: Robust Prevention of DIAL Attacks
Feb 2010
This paper carries out attacks using Internet services that aim to keep telephone devices busy, hindering legitimate callers from gaining access. The paper uses the term DIAL (Digitally Initiated...
Provided by Foundation for Research and Technology - FORTH
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White Papers
Practical Analysis of Asterisk SIP Server Performance
Jul 2008
This paper presents an analysis of the Asterisk server performance as a SIP server, as well as of bandwidth consumption in multiple scenarios. Server load has been tested using a certain type of...
Provided by University Politehnica of Bucharest
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White Papers
VoIP in Developing Countries: The Next Disruptive Technology?
May 2008
Voice over Internet Protocol (VoIP) has not proven itself as a disruptive technology in the developed world, but it may prove to be disruptive to un-served and under-served customer segments in...
Provided by Temple University
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White Papers
Tracking Encrypted VoIP Calls Via Robust Hashing of Network Flows
Mar 2010
In this work the authors propose a Voice over IP (VoIP) call tracking scheme based on robust hashing of VoIP flows. In the proposed scheme the audio content of a possibly encrypted VoIP flow is...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Packetization and Silence Influence on VoIP Traffic Profiles
Jan 2010
This paper presents an experimental study that extends the current knowledge of the VAD/DTX codec influence in the transmission rate. It considers the new GSM AMR codec as well as G.723.1 and...
Provided by Universidad de Sevilla
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White Papers
Benchmarking Videoconferencing Success
Jan 2010
Exactly what defines a successful videoconferencing session? If a company claims to have a videoconferencing success rate of 95%, exactly what does that mean? These are questions that have plagued...
Provided by Wainhouse Research
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White Papers
A Survey of VoIP Implementations in Taiwan 500 Biggest Export-Import Enterprises
Nov 2007
Voice over Internet Protocol (VoIP) is a critical innovation technology in the globally oriented business world, which emphasizes flexibility and efficiency as means to reduce operation cost and...
Provided by National Cheng Kung University
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White Papers
The Design of a Multi-Party VoIP Conferencing System Over the Internet
Jan 2008
This paper presents the design of a VoIP conferencing system that enables the voice communication of multiple users in the Internet. After studying the conversational dynamics in multi-party...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Mathematical Model of the Skype VoIP Congestion Control Algorithm
Dec 2008
The Internet is changing from being only an efficient platform for data delivery to become also a platform for audio/video applications. The stability of the traditional Internet is due to the TCP...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Economic Mechanisms for Protecting VoIP Services Within the IMS
Jul 2008
The IP Multimedia Subsystem (IMS) is the proposed Next Generation Network (NGN) architecture that will be used to provide revolutionary services based on an IP backbone. For successful IMS...
Provided by University of Cape Town
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White Papers
An Efficient Scheduling Scheme to Enhance the Capacity of VoIP Services in Evolved UTRA Uplink
Mar 2008
An efficient scheduling scheme is proposed to increase the available capacity of VoIP services over evolved UTRA uplink. On top of the advantages of persistent scheduling, the proposed scheme...
Provided by Yonsei University
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White Papers
Task Dependency of User Perceived Utility in Autonomic VoIP Systems
Dec 2007
The transmission of voice-over-Internet protocol (VoIP) network traffic is used in an increasing variety of applications and settings. Many of these applications involve communications where VoIP...
Provided by Drexel University
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White Papers
The Implementation of Speaker Recognition on VoIP Auditing in Gigabit High-Speed Environment
Nov 2009
VoIP(Voice over Internet Protocol) is low-cost, flexible and brings great convenience to people's life, but it also brings security problems such as cyber-crime issues. This paper aims to solve...
Provided by Academy Publisher
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White Papers
Dynamics of Feedback-Induced Packet Delay in Power-Law Networks
May 2010
Dynamic interactions of various network-related protocols induced by the functional partition make the Internet to be complicated systems; details are hardly captured because of large-scale and...
Provided by Osaka University
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White Papers
Automatically Complementing Protocol Specifications From Network Traces
May 2011
Network servers can be tested for correctness by resorting to a specification of the implemented protocol. However, producing a protocol specification can be a time-consuming task. In addition,...
Provided by Association for Competitive Technology
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White Papers
Utility-Directed Resource Allocation in Virtual Desktop Clouds
Jul 2011
User communities are rapidly transitioning their ''Traditional desktops'' that have dedicated hardware and software installations into ''Virtual Desktop Clouds'' (VDCs) that are accessible via...
Provided by Reed Elsevier
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White Papers
SPR Proxy Mechanism for 3GPP Policy and Charging Control System
Aug 2011
3GPP has standardized its Policy and Charging Control (PCC) system to provide dynamic policy control combined with real-time charging. The specific guidance on how PCC signaling delay can be...
Provided by Reed Elsevier
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White Papers
Capacity of a Class of Diamond Channels
Aug 2011
The authors study a special class of diamond channels which was introduced by Schein in 2001. In this special class, each diamond channel consists of a transmitter, a noisy relay, a noiseless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Secure Communication in Multiple Relay Networks Through Decode-and-Forward Strategies
Jan 2012
In this paper, the authors first study the Decode-and-Forward strategy for secrecy in a single-relay network. They propose a suboptimal Decode-and-Forward with Zero Forcing (DF/ZF) strategy for...
Provided by University of Maryland
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White Papers
Secrecy in Cooperative Relay Broadcast Channels
Jan 2011
The authors investigate the effects of user cooperation on the secrecy of broadcast channels by considering a cooperative relay broadcast channel. They show that user cooperation can increase the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Compression and Decompression of Virtual Disk Using Deduplication
Nov 2011
The basic goal of virtualization is to centralize administrative tasks while improving scalability and workload. One of the biggest challenges to the data storage community is how to effectively...
Provided by University of Pune
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White Papers
Multi-Agent System Approach for Congestion Control in ATM Networks
Nov 2011
The Broadband Integrated Services Digital Network (B-ISDN) supports transmission of different types of data such text, audio, images, video and combination of these types of data at higher...
Provided by Sipnas college of Engineering & Technology
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White Papers
Improving Delivery Ratio for Application - Layer Multicast Using IRP
Jun 2011
Reliability of tree-like multicast overlays caused by nodes' abrupt failures is considered as one of the major problems for the Internet application-layer media streaming service. The previous...
Provided by Panimalar Engineering College
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White Papers
Capacity (Cut-Set) Bounds for Multi-Hop Relay Networks in Erasure Channels
Jan 2012
This paper deals with the finding of capacity bounds for multi-hop relay networks in erasure channels. As importance of complex networks of nodes and relays and significance of erasure channels...
Provided by K L University
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White Papers
Performance Effects of Two-Way FAST TCP
Jun 2011
In this paper, the authors study the performance of delay-based congestion control in the presence of queueing in the reverse path. Specifically, they consider FAST TCP in a single-bottleneck...
Provided by Reed Elsevier
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White Papers
Architecture and Functional Structure of Transmission Control Protocol Over Various Networks Applications
Dec 2011
The communication functions and applications divided into layers, and each device or terminal has a assigned 'Stack' in these layers, where that permit each layer to speak and address the...
Provided by Journal of Theoretical and Applied Information Technology
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White Papers
ECN Verbose Mode: A Statistical Method for Network Path Congestion Estimation
Apr 2011
This paper introduces a simple and effective methodology to determine the level of congestion in a network with an ECN-like marking scheme. The purpose of the ECN bit is to notify TCP sources of...
Provided by Reed Elsevier
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White Papers
Evaluating Extensions to IMS Session Setup for Multicast-Based Many-to-Many Services
Oct 2010
Telecommunication networks are converging towards an all-IP paradigm that integrates a broad set of value-added services. In this context, the IP Multimedia Subsystem (IMS) is being developed by...
Provided by Reed Elsevier
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White Papers
Quality in Use of Domain Specific Languages: A Case Study
Oct 2011
Domain Specific Languages (DSLs) are claimed to increment productivity, while reducing the required maintenance and programming expertise. In this paper, DSLs usability is a key factor for its...
Provided by Association for Computing Machinery
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White Papers
Quality in Use of DSLs: Current Evaluation Methods
Jul 2011
Domain Specific Languages (DSLs) are claimed to contribute to increment productivity, while reducing the required maintenance and programming expertise. In this paper, the usability of these...
Provided by Universidade Nova de Lisboa
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White Papers
Mongoose: A TCP Fair Second Life Client
Jun 2010
Metaverses such as Second Life (SL) are a relatively new type of Internet application. Their functionality is similar to online 3D games but differs in that users are able to construct the...
Provided by Liverpool John Moores University
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White Papers
Guide to Starting Your Own Calling Card Business Share
Feb 2012
A Calling Card business is a popular kind of activity in the VoIP sphere. The Calling Card platform allows one to provide subscribers with international or long distance calls via a VoIP network....
Provided by Speedflow Communications
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White Papers
Power and Energy Containers for Multicore Servers
Nov 2011
Energy efficiency and power capping remain growing concerns in server systems. Online applications continue to evolve with new features and dynamic client-directed processing, resulting in varying...
Provided by University of Rochester
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Case Studies
Not-for-Profit Transforms Communication Service Delivery
Jul 2011
The Center for Sight & Hearing is a not-for-profit agency. Their challenges are to improve quality of life for individuals with vision and/or hearing losses, provide communication support for...
Provided by Cisco Systems
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Case Studies
Web Meetings Enhance Recruiting and Expand Applicant Pool
Jun 2010
The Arizona Office of the Auditor General serves as an independent source of financial and programmatic information for state and local government entities. Their challenge is to enable agency to...
Provided by Cisco Systems
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Case Studies
All-IP Service Provider Achieves 99% Provisioning Flowthrough
Jun 2008
Cbeyond is a company on the fast track one of the Voice over Internet Protocol (VoIP) service providers. The systems and spreadsheets that Cbeyond had been relying on to reserve and assign network...
Provided by Telcordia Technologies
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Case Studies
Public Agency Leads Green Movement by Taking Business Online
Aug 2010
The County of San Diego is making a concerted effort to go green. Their challenge is that employees in the same department can often be separated by more than 30 miles. Although maintaining...
Provided by Cisco Systems
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Case Studies
Boosting Balance Sheets and Carbon Scorecards
Jan 2012
Waitrose is one of the country's largest grocery retailers challenge is to reduce impact on environment, reducing costs for event attendees and provide platform for greater dialogue and...
Provided by Cisco Systems
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White Papers
Topologically Sorted Skylines for Partially Ordered Domains
Nov 2008
The vast majority of work on skyline queries considers totally ordered domains, whereas in many applications some attributes are partially ordered, as for instance, domains of set values,...
Provided by National Technical University of Athens
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White Papers
Datacenter-Scale Network Research on FPGAs
Apr 2011
The authors describe an FPGA-based datacenter network simulator to allow researchers to rapidly experiment with O(10, 000) node datacenter network architectures. They configure the FPGA hardware...
Provided by University of California
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White Papers
Development of a Prototype Domain-Specific Language for Monitor and Control Systems
Oct 2007
This paper describes the Domain-Specific Language (DSL) prototype developed for the NASA Constellation Launch Control System (LCS) project. A key element of the LCS architecture, the DSL prototype...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
On Optimal File Distribution in Practical Mesh-Based Overlay Networks
Oct 2010
Distributing large video files or operating system images over the Internet requires file servers with high bandwidth and large storage capacity. Overlay networks, including Content Distribution...
Provided by Academy Publisher
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White Papers
Exploring Attributes for Selecting VoIP Service in Korea
Jan 2012
In Korea, the number of VoIP users is expected to rapidly increase after introducing VoIP number portability on October 31, 2008. The total number already gone beyond 2 million, and the number of...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Blocking Artifacts Reduction in Compressed Data
Jan 2012
Blocking artifacts are significant problem in DCT-based image compression, which introduce the apparent distortion of visual quality. In this paper, an effective blocking artifacts deduction...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Efficient Frame Schedule Scheme for Real-time Video Transmission Across the Internet Using TCP
May 2009
The great end-to-end delays are the major factor to influence the visual quality of real-time video across the Internet using TCP as transport layer protocol. In this paper, the authors present a...
Provided by Academy Publisher
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White Papers
Fairness of High-Speed TCP Protocols With Different Flow Capacities
May 2009
Nowadays, the performance evaluation of high-speed TCP protocols is the subject of intensive research. The main criteria used to evaluate the performance are: Fairness, Backward compatibility,...
Provided by Academy Publisher
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White Papers
Congestion Control Based Analysis of High Delay Tolerant Network Transport Protocol
May 2011
The current congestion control mechanism used in TCP has difficulty reaching full utilization on high speed links, particularly on wide-area connections. One of reason is that regular TCP lays...
Provided by International Association of Computer Science & Information Technology (IACSIT)
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White Papers
Traffic Trading in the Competitive International Voice Market
Aug 2009
This paper highlights the trends that are reshaping the international long distance voice market. The authors' analysis focuses on voice exchanges, namely, electronic marketplaces where huge...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Congestion Control Without a Startup Phase
Jan 2012
The traditional TCP congestion control scheme often yields limited performance due to its conservative Slow Start algorithm, which can require many round-trip times to reach an appropriate sending...
Provided by Case Western Reserve University
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White Papers
Widely Tunable L-Band Brillouin Fiber Laser Incorporating a Bismuth-Based Erbium-Doped Fiber
Dec 2009
A widely tunable single-wavelength Brillouin Fiber Laser (BFL) incorporating a Bismuth-based Erbium-Doped Fiber (Bi-EDF) is proposed. The 52 cm-long highly erbium-doped Bi-EDF provides broadband...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Eight-Channel Wavelength Division Demultiplexer Using Multimode Interference
Dec 2009
The authors present a new design of wavelength division demultiplexer based on self-imaging principle in the MultiMode Interference (MMI) structure. They simulated an 8-channel wavelength...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Two-Mode Photonic Crystal Fiber Interferometer for Temperature and Strain Sensing
Dec 2009
A compact in-line interferometer is demonstrated by splicing a piece of Two-mode Photonic Crystal Fiber (TPCF) between two segments of Single Mode Fiber (SMF). The TPCF is completely homemade and...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Novel Proposal for DWDM Demultiplexer Design Using Resonance Cavity in Photonic Crystal Structure
Dec 2009
The authors propose an ultra compact structure for Dense Wavelength Division Multiplexing (DWDM) systems using resonance cavity in Photonic Crystal (PC) structure. To the best of the authors'...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Optical Fibre Technologies and Radio Over Fibre Strategic Research for Future Networks
Feb 2010
Wireless communication is entering a new phase where the focus is shifting from voice to multimedia services. Present consumers are no longer interested in the underlying technology; they simply...
Provided by Brunel University
-
White Papers
Pyridine Vapors Detection by an Optical Fibre Sensor
Feb 2008
An optical fiber sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in color from...
Provided by Molecular Diversity Preservation International (MDPI)
-
Whitepapers
A Theoretical Model of the Effects of Losses and Delays on the Performance of SIP
Oct 2008
The Session Initiation Protocol (SIP) is widely used for VoIP communication. Losses caused by network or server overload would cause retransmissions and delays in the session establishment and...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Wavelet-Based Traffic Analysis for Identifying Video Streams Over Broadband Networks
Oct 2008
Network and service providers are rapidly deploying IPTV networks to deliver a wide variety of video content to subscribers. Some video content may be protected by copyright and/or may be subject...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Thirty Days to Customer Data Integration: Superior Results Today, a Strategic Foundation for Your Future
Apr 2009
Many businesses urgently are pursuing customer-centric strategies as a cornerstone for maintaining economic health. Most of them still lack the necessary customer data management resources....
Provided by Experian
-
White Papers
Beyond MOS - Ensuring VoIP Service Quality
Jun 2010
As VoIP traffic continues to climb, CSPs are faced with the challenge of ensuring VoIP call quality. Monitoring of real-time VoIP services is complex, and existing IP network management solutions...
Provided by Stratecast
-
White Papers
VoIP and Quality, a System, Not a Product?
May 2008
In its simplest, VoIP is the transmission of voice communications over any data network utilizing the TCP/IP protocol, including the Internet. VoIP is here to stay. It's not some flashy,...
Provided by Netlink Technologies
-
White Papers
Maintaining the Edge: Voice Quality Management in a VoIP Environment
Apr 2008
The migration to next-generation IP networks has been a gradual one, as carriers have balanced new service deployment with the reality that the IP world lacked comprehensive and cost-effective...
Provided by Data Connection
-
White Papers
The Design of VoIP Systems With High Perceptual Conversational Quality
Dec 2008
This paper describes the work on real-time two-party and multi-party VoIP (voice-over-IP) systems that can achieve high perceptual conversational quality. It focuses on the fundamental...
Provided by University of Illinois
-
White Papers
Implementing VoIP?: Cover the Bases
Feb 2009
Convergence of voice and data networks, in the first instance by implementing a VoIP telephony system, is gaining huge momentum in the marketplace. For example, the telecoms research company,...
Provided by MorganDoyle
-
White Papers
A Realisitic VoIP Traffic Generation and Evaluation Tool for OMNeT++
Mar 2008
The fraction of voice over Internet Protocol (VoIP) based telephone calls among the totality of voice based communication acts has been significantly growing during the last years. In wired, as...
Provided by Association for Computing Machinery
-
White Papers
Detailed Analysis of Skype Traffic
Jan 2009
Skype is beyond any doubt the VoIP application in the current Internet application spectrum. Its amazing success has drawn the attention of telecom operators and the research community, both...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Towards Secure SIP Signalling Service for VoIP Applications
May 2009
Current Voice over IP (VoIP) services are regarded less secure than the traditional Public Switched Telephone Network (PSTN). This is due to the fact that VoIP services are frequently deployed in...
Provided by Karlstad University
-
White Papers
D(e|i)aling With VoIP: Robust Prevention of DIAL Attacks
Feb 2010
This paper carries out attacks using Internet services that aim to keep telephone devices busy, hindering legitimate callers from gaining access. The paper uses the term DIAL (Digitally Initiated...
Provided by Foundation for Research and Technology - FORTH
-
White Papers
Practical Analysis of Asterisk SIP Server Performance
Jul 2008
This paper presents an analysis of the Asterisk server performance as a SIP server, as well as of bandwidth consumption in multiple scenarios. Server load has been tested using a certain type of...
Provided by University Politehnica of Bucharest
-
White Papers
VoIP in Developing Countries: The Next Disruptive Technology?
May 2008
Voice over Internet Protocol (VoIP) has not proven itself as a disruptive technology in the developed world, but it may prove to be disruptive to un-served and under-served customer segments in...
Provided by Temple University
-
White Papers
Tracking Encrypted VoIP Calls Via Robust Hashing of Network Flows
Mar 2010
In this work the authors propose a Voice over IP (VoIP) call tracking scheme based on robust hashing of VoIP flows. In the proposed scheme the audio content of a possibly encrypted VoIP flow is...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Packetization and Silence Influence on VoIP Traffic Profiles
Jan 2010
This paper presents an experimental study that extends the current knowledge of the VAD/DTX codec influence in the transmission rate. It considers the new GSM AMR codec as well as G.723.1 and...
Provided by Universidad de Sevilla
-
White Papers
Benchmarking Videoconferencing Success
Jan 2010
Exactly what defines a successful videoconferencing session? If a company claims to have a videoconferencing success rate of 95%, exactly what does that mean? These are questions that have plagued...
Provided by Wainhouse Research
-
White Papers
A Survey of VoIP Implementations in Taiwan 500 Biggest Export-Import Enterprises
Nov 2007
Voice over Internet Protocol (VoIP) is a critical innovation technology in the globally oriented business world, which emphasizes flexibility and efficiency as means to reduce operation cost and...
Provided by National Cheng Kung University
-
White Papers
The Design of a Multi-Party VoIP Conferencing System Over the Internet
Jan 2008
This paper presents the design of a VoIP conferencing system that enables the voice communication of multiple users in the Internet. After studying the conversational dynamics in multi-party...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Mathematical Model of the Skype VoIP Congestion Control Algorithm
Dec 2008
The Internet is changing from being only an efficient platform for data delivery to become also a platform for audio/video applications. The stability of the traditional Internet is due to the TCP...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Economic Mechanisms for Protecting VoIP Services Within the IMS
Jul 2008
The IP Multimedia Subsystem (IMS) is the proposed Next Generation Network (NGN) architecture that will be used to provide revolutionary services based on an IP backbone. For successful IMS...
Provided by University of Cape Town
-
White Papers
An Efficient Scheduling Scheme to Enhance the Capacity of VoIP Services in Evolved UTRA Uplink
Mar 2008
An efficient scheduling scheme is proposed to increase the available capacity of VoIP services over evolved UTRA uplink. On top of the advantages of persistent scheduling, the proposed scheme...
Provided by Yonsei University
-
White Papers
Task Dependency of User Perceived Utility in Autonomic VoIP Systems
Dec 2007
The transmission of voice-over-Internet protocol (VoIP) network traffic is used in an increasing variety of applications and settings. Many of these applications involve communications where VoIP...
Provided by Drexel University
-
White Papers
The Implementation of Speaker Recognition on VoIP Auditing in Gigabit High-Speed Environment
Nov 2009
VoIP(Voice over Internet Protocol) is low-cost, flexible and brings great convenience to people's life, but it also brings security problems such as cyber-crime issues. This paper aims to solve...
Provided by Academy Publisher
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Whitepapers
Privacy in VoIP Networks: A K-Anonymity Approach
Jan 2009
Peer-to-Peer VoIP (voice over IP) networks, exemplified by Skype, are becoming increasingly popular due to their significant cost advantage and richer call forwarding features than traditional...
Provided by IBM
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White Papers
Voice-TFCC: A TCP-Friendly Congestion Control Scheme for VoIP Flows
Jun 2008
Typically, VoIP traffic is deployed as best-effort traffic over Internet links. This voice traffic lacks effective and scalable end-to-end congestion control. The paper proposes a new VoIP...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Rural Telemedicine Networks Using Store-and-Forward Voice-Over-IP
Aug 2009
Store and forward Voice-over-IP is a suggested solution for supporting Telemedicine at rural health clinics in developing countries. Solutions described to date are designed to support...
Provided by European Federation for Medical Informatics
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White Papers
Telemedicine Using VoIP Combined With a Store and Forward Approach
Jan 2010
Rural areas in South Africa have unique conditions such as remoteness and scarcity of reliable public facilities. Information and Communication Technologies (ICTs) introduced into these areas must...
Provided by University of Cape Town
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White Papers
Understanding the Spectrum: Videoconferencing to Telepresence Solutions
May 2010
Videoconferencing and telepresence in particular give organizations the ability to effectively message and align an entire company. Videoconferencing and telepresence not only help executives...
Provided by IDG (International Data Group)
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White Papers
Scalable Video Conferencing Using Subband Transform Coding and Layered Multicast Transmission
Jan 2010
This paper proposes an approach to designing a scalable multiresolution video conferencing system using a hierarchical video-coding algorithm based on the wavelet transform and an associated...
Provided by Alkit Communications
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White Papers
Videoconferencing Using Open-Source Software: Building a Proof-of-Concept Platform for Communications and Distance Learning
Jul 2008
Traditionally, videoconferencing refers to the use of video and audio to facilitate communication and interactions between individuals in different geographical locations. A good example:...
Provided by Rochester Institute of Technology
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White Papers
Audio-Visual Privacy Protection for Video Conference
Mar 2009
Group video-conferencing systems are routinely used in major corporations, hospitals and universities for meetings, tele-medicine and distance learning among participants from very distant...
Provided by University of Kentucky
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White Papers
Video Conferencing as an Engineering Education System
May 2009
This paper presents VICES project that will be implemented under the framework of the European TEMPUS programme. The project will establish video conferencing infrastructure as a support of the...
Provided by Ss. Cyril and Methodius University in Skopje
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White Papers
Design Issues for Videoconferencing in Earth and Life Sciences: The Case of the Agricultural University of Athens
Dec 2007
In Earth and Life Science courses such as agricultural, environmental and biomedical courses teaching and learning conditions and requirements present certain peculiarities. In this paper, the...
Provided by Agricultural University Of Athens
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White Papers
An Evaluation of Architectures for IMS Based Video Conferencing
Jul 2008
The IP Multimedia Subsystem is an architectural framework for delivering multimedia services over an Internet Protocol (IP) network. Originally, it was specified for wireless networks, but has...
Provided by University of Cape Town
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White Papers
A Multi-Robot System for Unconfined Video-Conferencing
Sep 2009
Telepresence or tele-immersion technologies allow people to attend a shared meeting without being physically present in the same location. Commercial telepresence solutions available in the market...
Provided by University of Minnesota
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White Papers
Facilitating Knowledge Convergence in Videoconferencing Environments: The Role of External Representation Tools
Oct 2008
The study analyzed how two types of graphical representation tools influence the way in which dyads use shared and unshared knowledge resources in different collaboration scenarios, and how...
Provided by University of Munich
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White Papers
Connecting the Worlds: Multipoint Videoconferencing Integrating H.323 and IPv4, SIP and IPv6 With Autonomous Sender Authentication
Apr 2009
This paper presents a multipoint media conference software with extended network capabilities. Its core components combine an advanced, highly efficient H.264/AVC video coding system. Session...
Provided by Fraunhofer HHI
