AT&T Labs-Research

Displaying 1-8 of 8 results

  • White Papers // Mar 2013

    Performance of a Random-Access Wireless Network with a Mix of Full-And Half-Duplex Stations

    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 transmissions involve data transmitted simultaneously in both directions, and this influences the dynamics of the queue at the Access Point. Given the...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2013

    Exact-Repair Regenerating Codes Via Layered Erasure Correction and Block Designs

    A new class of exact-repair regenerating codes is constructed by combining two layers of erasure correction codes together with combinatorial block designs. The proposed codes have the \"Uncoded repair\" property where the nodes participating in the repair simply transfer part of the stored data directly, without performing any computation. The...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2011

    Snapshot Queries: Towards Data-Centric Sensor Networks

    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 used for electing, using a localized algorithm, a small set of representative nodes in the network. These representative nodes constitute a...

    Provided By AT&T Labs-Research

  • White Papers // Dec 2010

    Secret Sharing Krohn-Rhodes: Private and Perennial Distributed Computation

    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 contents of some of them are exposed, no information is revealed about the state of the...

    Provided By AT&T Labs-Research

  • White Papers // Apr 2010

    Proactive Network Management of IPTV Networks

    Consumer communications and entertainment services, including broadcast TV and VoIP, require service providers to meet stringent availability and latency constraints. When a packet technology, such as IP, is used to transport these services, this also poses stringent packet loss requirement on the network. This aspect of IPTV, where impairments have...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2010

    Economic Analysis of IP/Optical Network Architectures

    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 point-to-point DWDM systems. However, there is interest in using an opaque RON to provide the connectivity (links) between IP routers. Authors define an opaque RON as...

    Provided By AT&T Labs-Research

  • White Papers // Dec 2009

    Data Integration With Dependent Sources

    Data integration systems offer users a uniform interface to a set of data sources. Previous work has typically assumed that the data sources are independent of each other; however, in scenarios involving large numbers of sources, such as the web or large enterprises, there is an eco-system of dependent sources,...

    Provided By AT&T Labs-Research

  • White Papers // Sep 2009

    Semantics and Algorithms for Data-Dependent Grammars

    Traditional parser generation technologies are incapable of handling the demands of modern programmers. In this paper, the authors present the design and theory of a new parsing engine, YAKKER, capable of handling the requirements of modern applications including full scannerless context-free grammars with regular expressions as right-hand sides for defining...

    Provided By AT&T Labs-Research

  • White Papers // Sep 2009

    Semantics and Algorithms for Data-Dependent Grammars

    Traditional parser generation technologies are incapable of handling the demands of modern programmers. In this paper, the authors present the design and theory of a new parsing engine, YAKKER, capable of handling the requirements of modern applications including full scannerless context-free grammars with regular expressions as right-hand sides for defining...

    Provided By AT&T Labs-Research

  • White Papers // Dec 2009

    Data Integration With Dependent Sources

    Data integration systems offer users a uniform interface to a set of data sources. Previous work has typically assumed that the data sources are independent of each other; however, in scenarios involving large numbers of sources, such as the web or large enterprises, there is an eco-system of dependent sources,...

    Provided By AT&T Labs-Research

  • White Papers // Dec 2010

    Secret Sharing Krohn-Rhodes: Private and Perennial Distributed Computation

    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 contents of some of them are exposed, no information is revealed about the state of the...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2011

    Snapshot Queries: Towards Data-Centric Sensor Networks

    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 used for electing, using a localized algorithm, a small set of representative nodes in the network. These representative nodes constitute a...

    Provided By AT&T Labs-Research

  • White Papers // Mar 2013

    Performance of a Random-Access Wireless Network with a Mix of Full-And Half-Duplex Stations

    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 transmissions involve data transmitted simultaneously in both directions, and this influences the dynamics of the queue at the Access Point. Given the...

    Provided By AT&T Labs-Research

  • White Papers // Apr 2010

    Proactive Network Management of IPTV Networks

    Consumer communications and entertainment services, including broadcast TV and VoIP, require service providers to meet stringent availability and latency constraints. When a packet technology, such as IP, is used to transport these services, this also poses stringent packet loss requirement on the network. This aspect of IPTV, where impairments have...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2010

    Economic Analysis of IP/Optical Network Architectures

    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 point-to-point DWDM systems. However, there is interest in using an opaque RON to provide the connectivity (links) between IP routers. Authors define an opaque RON as...

    Provided By AT&T Labs-Research

  • White Papers // Jan 2013

    Exact-Repair Regenerating Codes Via Layered Erasure Correction and Block Designs

    A new class of exact-repair regenerating codes is constructed by combining two layers of erasure correction codes together with combinatorial block designs. The proposed codes have the \"Uncoded repair\" property where the nodes participating in the repair simply transfer part of the stored data directly, without performing any computation. The...

    Provided By AT&T Labs-Research