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AT&T Labs
(105 results)-
White Papers
Secret Sharing Krohn-Rhodes: Private and Perennial Distributed Computation
December 15, 2010, 12:00am PST
In this paper, the authors consider the problem of n agents wishing to perform a given computation on common inputs in a privacy preserving manner, in the sense that even if the entire memory...
Provided by AT&T Labs-Research
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White Papers
Snapshot Queries: Towards Data-Centric Sensor Networks
January 1, 2011, 12:00am PST
In this paper, the authors introduce the idea of snapshot queries for energy efficient data acquisition in sensor networks. Network nodes generate models of their surrounding environments that are...
Provided by AT&T Labs-Research
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Whitepapers
How an SMS-Based Malware Infection Will Get Throttled by the Wireless Link
May 24, 2012, 12:00am PDT
As smart phones increase in popularity, they become an attractive target for attackers and spammers. This paper presents a new simulation model that evaluates the effects of an SMS-based malware...
Provided by AT&T Services
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Whitepapers
Writing on Insertion Paper
May 24, 2012, 12:00am PDT
The capacity of insertion channels, even in the presence of feedback, is an open problem in information theory. In this paper, the authors prove that the capacity of insertion channel with...
Provided by AT&T Labs
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Whitepapers
Circuit Planning Tool Over Heterogeneous Networks
April 8, 2011, 12:00am PDT
Currently, there is no existing solution or tool to efficiently route a high-speed circuit over heterogeneous DWDM networks under multi-vendor environment, although each vendor may provide a...
Provided by AT&T Labs
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Whitepapers
Fast Rerouting for IP Multicast in Managed IPTV Networks
August 7, 2009, 12:00am PDT
Recent deployment of IP based multimedia distribution; especially broadcast TV distribution has increased the importance of simple and fast restoration during IP network failures for service...
Provided by AT&T Labs
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Whitepapers
COPSS: An Efficient Content Oriented Publish/Subscribe System
August 29, 2011, 12:00am PDT
Content-Centric Networks (CCN) provides substantial flexibility for users to obtain information without regard to the source of the information or its current location. publish/subscribe (pub/sub)...
Provided by AT&T Labs
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Whitepapers
Using Large Scale Distributed Computing to Unveil Advanced Persistent Threats
December 11, 2012, 12:00am PST
Besides a large set of malware categories such as worms and Trojan horses, Advanced Persistent Threat (APT) is another more sophisticated and highly targeted attack emerging in the cyber threats...
Provided by AT&T Inc.
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Whitepapers
A Novel Bargaining Based Incentive Protocol for Opportunistic Networks
November 21, 2012, 12:00am PST
Opportunistic networks are the emerging networks featured by partitions, long disconnections, and topology instability, where the message propagation depends on the cooperation of nodes to fulfill...
Provided by AT&T Labs
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Whitepapers
Performance of a Random-Access Wireless Network with a Mix of Full-And Half-Duplex Stations
March 13, 2013, 12:00am PDT
In this paper, the authors consider the performance of a random-access time-slotted wireless network with a single Access Point and a mix of half- and full-duplex stations. Full-duplex...
Provided by AT&T Labs-Research
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White Papers
Vision: VPMN - Virtual Private Mobile Network Towards Mobility-as-a-Service
April 21, 2011, 12:00am PDT
In this paper the authors present their vision for a mobile network infrastructure that embraces advances in virtualization to dynamically create private, resource isolated, customizable, and...
Provided by AT&T Labs
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White Papers
Implementing Pushback: Router-Based Defense Against DDoS Attacks
January 1, 2011, 12:00am PST
Pushback is a mechanism for defending against Distributed Denial-of-Service (DDoS) attacks. DDoS attacks are treated as a congestion-control problem, but because most such congestion is caused by...
Provided by AT&T Labs
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White Papers
Network Monitoring for Video Quality Over IP
December 1, 2007, 12:00am PST
This paper considers the problem of predicting application-level video quality based on monitoring video packets within the network. The goal is to detect impairments (either server- or...
Provided by AT&T Intellectual Property
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White Papers
Filtering Sources of Unwanted Traffic
February 5, 2008, 12:00am PST
There is a large and increasing amount of unwanted traffic on the Internet today, including phishing, spam, and distributed denial-of-service attacks. One way to deal with this problem is to...
Provided by AT&T Labs
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White Papers
Network Programmability Is the Answer!
January 1, 2011, 12:00am PST
Recent developments in the broader networking community involve the decomposing and/or refactoring of network functions in order to ease the introduction of new protocols and services and indeed...
Provided by AT&T Labs
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White Papers
Channel Access Throttling for Improving WLAN QoS
July 17, 2009, 12:00am PDT
The de facto QoS channel access method for the IEEE 802.11 Wireless LANs is the Enhanced Distributed Channel Access (EDCA) mechanism, which differentiates transmission treatments for data frames...
Provided by AT&T Labs
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White Papers
Efficient and Resilient Backbones for Multihop Wireless Networks
January 1, 2011, 12:00am PST
The authors consider the problem of finding "Backbones" in multi-hop wireless networks. The backbone provides end-to-end connectivity, allowing non-backbone nodes to save energy since they do not...
Provided by AT&T Labs
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White Papers
Streams, Security and Scalability
January 1, 2008, 12:00am PST
Network-based attacks, such as DDoS attacks and worms, are threatening the continued utility of the Internet. As the variety and the sophistication of attacks grow, early detection of potential...
Provided by AT&T Labs-Research
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White Papers
Addressing Heterogeneity, Scalability, and Privacy in Layered Multicast Congestion Control
May 15, 2008, 12:00am PDT
Multicast is attracting a resurgence of interest because it has a potential to address the explosively growing need for efficient streaming of large-volume Internet content. However, to realize...
Provided by AT&T Labs-Research
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White Papers
Traffic Engineering With Traditional IP Routing Protocols
January 1, 2008, 12:00am PST
Traffic engineering involves adapting the routing of traffic to the network conditions, with the joint goals of good user performance and efficient use of network resources. This paper describe an...
Provided by AT&T Labs-Research
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White Papers
Scalable Geocast for Vehicular Networks
July 27, 2011, 12:00am PDT
This paper presents GeoVCom, a robust geocast protocol for vehicular networks. GeoVCom allows a vehicle to send geocast messages to all vehicles in a given geographical area without the sender...
Provided by AT&T Labs
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White Papers
Geocast for Wireless Sensor Networks
August 25, 2011, 12:00am PDT
An important but relatively less studied class of network layer protocol for sensor networks is geocast. It allows a sensor node to send messages to all nodes in a given geographical area without...
Provided by AT&T Labs
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Case Studies
U.S. Olympic Training Centers: High-Speed Networking Aids the Quest for Gold
October 30, 2007, 12:00am PDT
The Olympic Training Centers need to create a rich development environment for the athletes training in hopes of making the U.S. Olympic Team or U.S. Paralympic Team, offering all the resources,...
Provided by AT&T Intellectual Property
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White Papers
Efficient Packet Monitoring for Network Management
November 7, 2007, 12:00am PST
Network monitoring is a vital part of modern network infrastructure management. Existing techniques either present a restricted view of network behavior and state, or do not efficiently scale to...
Provided by AT&T Labs-Research
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White Papers
Fighting Spam by Encapsulating Policy in Email Addresses
January 1, 2008, 12:00am PST
Everyday network interactions require users to give out their email address, yet no guarantees can be made about how this address will be used. Sometimes the address is given to a human (e.g., on...
Provided by AT&T Labs-Research
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White Papers
Analyzing the Spatial Quality of Internet Streaming Video
January 1, 2008, 12:00am PST
The quality of video over the Internet is determined both by the original encoded video quality and by any impairments caused by the network. This paper considers the first of these factors. The...
Provided by AT&T Labs-Research
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White Papers
Adaptive Processing of Top-k Queries in XML
January 1, 2008, 12:00am PST
The ability to compute top-k matches to XML queries is gaining importance due to the increasing number of large XML repositories. The efficiency of top-k query evaluation relies on using scores to...
Provided by AT&T Labs-Research
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White Papers
Avoiding Ties in Shortest Path First Routing
July 23, 2009, 12:00am PDT
First the authors discuss problems associated with ties and flow splitting with shortest path first protocols such as OSPF and IS-IS. The problems relate to uncertainty in the splitting when there...
Provided by AT&T Labs
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White Papers
Characterizing Fairness for 3G Wireless Networks
September 16, 2011, 12:00am PDT
The end to end system data performance over a 3G cellular network depends on many factors such as the number of users, interference, multipath propagation, radio resource management techniques as...
Provided by AT&T Labs
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Whitepapers
Statistical Distortion: Consequences of Data Cleaning
August 9, 2012, 12:00am PDT
The authors introduce the notion of statistical distortion as an essential metric for measuring the effectiveness of data cleaning strategies. They use this metric to propose a widely applicable...
Provided by AT&T Labs
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Software
AT&T Jobs 1.2 (iOS)
October 14, 2009, 12:00am PDT
Straight from the source, straight to your iPhone, with the new AT&T Jobs application. Get in touch and stay connected with current job opportunities and events at AT&T - all from the palm of your...
Provided by AT&T
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Software
NBC Olympics on AT&T 1.3 (iOS)
February 16, 2010, 12:00am PST
NBC OLYMPICS. BE THERE, WHEREVER YOU ARE.Experience the best of the 2010 Vancouver Olympic Winter Games with the NBC Olympics app. Follow all the action with live real-time updates on every event...
Provided by AT&T
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Software
AT&T WorkBench 1.0 (iOS)
March 15, 2010, 12:00am PDT
The AT&T WorkBench is a new capability of AT&Ts Mobile Enterprise Applications Platform (MEAP), delivering the power of enterprise applications to the iPhone. AT&T MEAP customers can now easily...
Provided by AT&T
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Software
AT&T Mark the Spot (iPhone) 1.2 (iOS)
April 7, 2010, 12:00am PDT
Simplicity of operation. Submit a report of call or data problems. Submit a real time report capturing local GPS coordinates at time and place of event. Submit a report after the fact when a...
Provided by AT&T
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Webcasts
On-Demand Webcast: Speeding Adoption of Enterprise 2.0
March 18, 2009, 12:00am PDT
The presenters discuss how Social Networking can be used effectively in a corporate environment for knowledge management, integration, business development and brand consolidation. The speed of...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: MPLS in 2009: Where to From Here?
February 25, 2009, 12:00am PST
With nearly 75% of all enterprises deploying MPLS for site-to-site connectivity, the question becomes "Now what?" The attendee will learn how to make the most of the MPLS network as the presenter...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Lowering the TCO for Business Applications
March 25, 2009, 12:00am PDT
Critical business applications require continuous care and investment. Now, more than ever, enterprises must ensure their applications scale to their changing business needs, without incurring...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: How Green Is Your IT?
September 26, 2008, 12:00am PDT
"Green IT" combines two different goals: cutting costs by reducing energy consumption and reducing an organization's carbon footprint for policy reasons beyond saving money. According to presenter...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Mobile Strategies and Direction
November 12, 2007, 12:00am PST
When it comes to handling mobility issues, moving from strategy to execution means defining the optimization plans and quantifying the results. The presenters give insights into the best practices...
Provided by AT&T Intellectual Property
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White Papers
Multicast Topology Inference From Measured End-to-End Loss
January 1, 2009, 12:00am PST
The use of multicast inference on end-to-end measurement has recently been proposed as a means to infer network internal characteristics such as packet link loss rate and delay. This paper...
Provided by AT&T Intellectual Property
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White Papers
Satem: Trusted Service Code Execution Across Transactions
January 1, 2011, 12:00am PST
Web services and service oriented architectures are becoming the de facto standard for Internet computing. A main problem faced by users of such services is how to ensure that the service code is...
Provided by AT&T Labs
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White Papers
Measuring Privacy Loss and the Impact of Privacy Protection in Web Browsing
July 20, 2007, 12:00am PDT
Various bits of information about users accessing Web sites. some of which are private, have been gathered since the inception of the Web. Increasingly the gathering, aggregation, and processing...
Provided by AT&T Labs
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White Papers
Privacy Leakage in Mobile Online Social Networks
June 11, 2010, 12:00am PDT
Mobile Online Social Networks (mOSNs) have recently grown in popularity. With the ubiquitous use of mobile devices and a rapid shift of technology and access to OSNs, it is important to examine...
Provided by AT&T Labs
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White Papers
Aggregate-Based Congestion Control
January 1, 2011, 12:00am PST
Recent events have illustrated the Internet's vulnerability to both Denial of Service (DoS) attacks and flash crowds in which links (or servers) in the network become severely congested. In both...
Provided by AT&T Labs
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White Papers
On the Constancy of Internet Path Properties
November 7, 2007, 12:00am PST
Many Internet protocols and operational procedures use measurements to guide future actions. This is an effective strategy if the quantities being measured exhibit a degree of constancy: that is,...
Provided by AT&T
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White Papers
IP Network Configuration for Intradomain Traffic Engineering
November 7, 2007, 12:00am PST
The smooth operation of the Internet depends on the careful configuration of routers in thousands of autonomous systems throughout the world. Configuring routers is extremely complicated because...
Provided by AT&T
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White Papers
Cloud Services: What Are They, What Value Do They Provide?
May 28, 2010, 12:00am PDT
Enterprises have traditionally been making new capital infrastructure investments to keep up with growing IT and Web demands. This approach is increasingly cost prohibitive and is becoming so...
Provided by AT&T Intellectual Property
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White Papers
Virtualization: An Overview
July 14, 2008, 12:00am PDT
Virtualization contributes to higher levels of business continuity in a couple of ways. For example, with the decoupling of software applications, operating systems and hardware platforms, fewer...
Provided by AT&T Intellectual Property
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White Papers
Towards a Ubiquitous Cloud Computing Infrastructure
April 14, 2010, 12:00am PDT
In this extended abstract the authors explores the architectural components of a Cloud Control Architecture with the aid of a number of cloud computing use cases. This paper specifically considers...
Provided by AT&T
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White Papers
Protocol and Network Design for Manageability
January 1, 2010, 12:00am PST
Designing an IP network is a challenging task that requires selecting from a wide variety of components, protocols, and mechanisms to meet current and future demands. Equally daunting, managing...
Provided by AT&T Intellectual Property
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White Papers
Emerging Technology: Telepresence Solutions
November 25, 2008, 12:00am PST
Telepresence offers a completely new way to collaborate. This new technology enables connections across companies and locations, so that one can meet with customers, suppliers and business...
Provided by AT&T Intellectual Property
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White Papers
Economic Analysis of IP/Optical Network Architectures
January 1, 2010, 12:00am PST
A Re-configurable Optical Network (RON) potentially offers service providers opportunities to optimize their IP network architectures. Large IP backbones are typically deployed directly over...
Provided by AT&T Labs-Research
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White Papers
Combining Routing and Traffic Data for Detection of IP Forwarding Anomalies
January 1, 2010, 12:00am PST
For rapid problem-diagnosis in data-transmission over the internet, the use of an innovative technology that detects forwarding anomalies uses a combined feature system with routing. One of the...
Provided by AT&T Labs
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White Papers
Proactive Network Management of IPTV Networks
April 6, 2010, 12:00am PDT
Consumer communications and entertainment services, including broadcast TV and VoIP, require service providers to meet stringent availability and latency constraints. When a packet technology,...
Provided by AT&T Labs-Research
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White Papers
A Look Back at "Security Problems in the TCP/IP Protocol Suite"
August 28, 2008, 12:00am PDT
Several points are immediately obvious from this analysis. The first, surely, is that in general, relying on the IP source address for authentication is extremely dangerous. Fortunately, the...
Provided by AT&T Labs-Research
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White Papers
Power Control for Wireless Packet Voice With Application to EDGE System
January 1, 2010, 12:00am PST
In this paper, using the EDGE system as an example, the paper applies a Kalman-filter power control method based on interference tracking and prediction to packet voice service in wireless...
Provided by AT&T Intellectual Property
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White Papers
Potential Benefits of Delta Encoding and Data Compression for HTTP
January 1, 2010, 12:00am PST
Caching in the World Wide Web currently follows a naive model, which assumes that resources are referenced many times between changes. The model also provides no way to update a cache entry if a...
Provided by AT&T Intellectual Property
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White Papers
A Cryptographic File System for Unix
January 1, 2010, 12:00am PST
Although cryptographic techniques are playing an increasingly important role in modern computing system security, userlevel tools for encrypting file data are cumbersome and suffer from a number...
Provided by AT&T Intellectual Property
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White Papers
Public Policy Principles for Promoting Efficient Wireless Innovation and Investment
September 30, 2009, 12:00am PDT
The Commission should employ a customer-centric approach to broadband policy generally and to policies that address wireless innovation and investment in particular. The proper focus of a...
Provided by AT&T Intellectual Property
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White Papers
FastRWeb: Fast Interactive Web Framework for Data Mining Using R
December 8, 2008, 12:00am PST
R is widely used and accepted as a very versatile tool for statistical computing and data analysis. It provides a plethora of cutting edge methods, tools and algorithms. However, typical data...
Provided by AT&T Intellectual Property
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White Papers
Fishing for Phishing From the Network Stream
October 7, 2008, 12:00am PDT
Phishing is an increasingly prevalent social-engineering attack that attempts identity theft using spoofed Web pages of legitimate organizations. Unfortunately, current phishing detection methods...
Provided by AT&T Labs-Research
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White Papers
Dialog Speech Acts and Prosody: Considerations for TTS
January 1, 2009, 12:00am PST
As natural language dialog systems involving both speech recognition and Text-To-Speech (TTS) synthesis become more sophisticated, the limitations of general-purpose TTS for human-computer dialogs...
Provided by AT&T Intellectual Property
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White Papers
Importance Sampling Via Load-Balanced Facility Location
February 20, 2008, 12:00am PST
This paper considers the problem of "Importance sampling" from a high dynamic range image, motivated by a computer graphics problem called image-based lighting. Image-based lighting is a method to...
Provided by AT&T Intellectual Property
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White Papers
Directed Graphs and Rectangular Layouts (Extended Abstract)
January 1, 2009, 12:00am PST
This paper deals with the problem, arising in practice, of drawing a directed graph as a collection of disjoint, isothetic rectangles, where the rectangles of the nodes of each edge must touch and...
Provided by AT&T Intellectual Property
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White Papers
Design, Implementation and Operation of a Large Enterprise Content Distribution Network
January 1, 2009, 12:00am PST
Content Distribution Networks (CDNs) are becoming an important resource in enterprise networks. They are being used in applications ranging from broadcasted townhall-style meetings to the...
Provided by AT&T Intellectual Property
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White Papers
Efficient Table Anonymization for Aggregate Query Answering
January 1, 2009, 12:00am PST
Privacy protection is a major concern when microdata need to be released for ad hoc analyses. This has led to a lot of recent research in privacy goals and table anonymization schemes, such as...
Provided by AT&T Intellectual Property
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White Papers
Avoiding Instability During Graceful Shutdown of Multiple OSPF Routers
January 1, 2009, 12:00am PST
Many recent router architectures decouple the routing engine from the forwarding engine, allowing packet forwarding to continue even when the routing process is not active. This opens up the...
Provided by AT&T Intellectual Property
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White Papers
Speech-Plans: Generating Evaluative Responses in Spoken Dialogue
January 1, 2009, 12:00am PST
Recent paper on evaluation of spoken dialogue systems indicates that better algorithms are needed for the presentation of complex information in speech. Current dialogue systems often rely on...
Provided by AT&T Intellectual Property
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White Papers
Demonstration of a POMDP Voice Dialer
April 14, 2008, 12:00am PDT
This paper is a demonstration of a voice dialer, implemented as a Partially Observable Markov Decision Process (POMDP). A real-time graphical display shows the POMDP's probability distribution...
Provided by AT&T Intellectual Property
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White Papers
DjVu: Analyzing and Compressing Scanned Documents for Internet Distribution
January 1, 2009, 12:00am PST
DjVu is an image compression technique specifically geared towards the compression of scanned documents in color at high resolution. Typical magazine pages in color scanned at 300dpi are...
Provided by AT&T Intellectual Property
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White Papers
Mining Customer Care Dialogs for "Daily News"
January 1, 2009, 12:00am PST
As large-scale deployments of spoken dialog systems in call centers become more common, a wealth of information is gathered about the call center business as well as the operation of these systems...
Provided by AT&T Intellectual Property
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White Papers
Interleaver Design for Short Block Length Turbo Codes
January 1, 2009, 12:00am PST
The performance of a Turbo code depends on the interleaver design. There are two major criteria that can be considered in the design of an interleaver. Distance spectrum properties of the code and...
Provided by AT&T Intellectual Property
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White Papers
GMM/SVM N-Best Speaker Identification Under Mismatch Channel Conditions
January 17, 2008, 12:00am PST
Under severe channel mismatch conditions, such as training with far-field speech and testing with telephone data, performance of Speaker Identification (SID) degrades significantly, often below...
Provided by AT&T Intellectual Property
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White Papers
OSPF Monitoring: Architecture, Design and Deployment Experience
January 1, 2009, 12:00am PST
Improving IP control plane (routing) robustness is critical to the creation of reliable and stable IP services. Yet very few tools exist for effective IP route monitoring and management. This...
Provided by AT&T Intellectual Property
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White Papers
CPM: Adaptive Video-on-Demand With Cooperative Peer Assists and Multicast
August 29, 2008, 12:00am PDT
This paper presents CPM, a unified approach that exploits server multicast, assisted by peer downloads, to provide efficient Video-on-Demand (VoD) in a service provider environment. They describe...
Provided by AT&T Intellectual Property
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White Papers
Rule-Based Anomaly Detection on IP Flows
January 20, 2009, 12:00am PST
Rule-based packet classification is a powerful method for identifying traffic anomalies, with network security as a key application area. While popular systems like Snort are used in many network...
Provided by AT&T Intellectual Property
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White Papers
Fast Indexes and Algorithms for Set Similarity Selection Queries
November 27, 2007, 12:00am PST
Data collections often have inconsistencies that arise due to a variety of reasons, and it is desirable to be able to identify and resolve them efficiently. Set similarity queries are commonly...
Provided by AT&T Intellectual Property
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White Papers
The Best of Both Worlds: Unifying Conventional Dialog Systems and POMDPs
June 20, 2008, 12:00am PDT
Partially Observable Markov Decision Processes (POMDPs) and conventional design practices offer two very different but complementary approaches to building spoken dialog systems. Whereas...
Provided by AT&T Intellectual Property
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White Papers
Charging From Sampled Network Usage
January 1, 2009, 12:00am PST
IP flows have heavy-tailed packet and byte size distributions. This make them poor candidates for uniform sampling-i.e. selecting 1 in N Flows-since omission or inclusion of a large flow can have...
Provided by AT&T Intellectual Property
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White Papers
Pronunciation Lexicon Adaptation for TTS Voice Building
January 1, 2009, 12:00am PST
This paper describes reducing phone label errors in TTS voice building by means of modeling of speaker pronunciation variants. Each speaker has his or her own unique pronunciations (and...
Provided by AT&T Intellectual Property
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