The Experts below are selected from a list of 330129 Experts worldwide ranked by ideXlab platform

Hitomi Tamura - One of the best experts on this subject based on the ideXlab platform.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Simulation Modelling Practice and Theory, 2011
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    Abstract We have proposed the concept of the virtual segment (VS), in which a global Communication Service is provided by combining a store–carry–forward scheme using vehicles with broadband wireless/wired network infrastructures along roads connected to the Internet. The VS can be a practical framework for non-real-time, asynchronous message transfer (especially for large messages) in a cost-effective manner. In this study, a critical implementation design issue, the message forward scheduling, in the VS approach is discussed and investigated through computer simulation by our developed VS simulator that has reflected the results of the field experiment for realistic performance evaluation.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Intelligent Networking and Collaborative Systems, 2009
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    In the Internet of the future, a flexible, dynamic combination of wireless and wired access networks is expected to be a key driver for enlarging the broadband Communication Service area. However, in general, the number of broadband wireless access points is limited due to their cost, and hence, they cannot cover the whole network. On the other hand, various message delivery schemes based on store-carry-forward routing with some extensions have been studied to support nonreal- time Communication in sparse or intermittent networks. However, Communication Services based solely on the storecarry- forward schemes covering a large area are inefficient because the delay time for message delivery increases in proportion to the size of the Service area. Therefore, to extend the Communication Service area with controllable performance in a cost-effective manner, the authors have proposed a concept of Virtual Segment (VS) in which global Communication Service is provided by combining a store-carry-forward scheme with broadband wireless/wired network infrastructures connected to the Internet to deploy the supplementary infrastructure. Along this line, in the present paper, the issues on the addressing and the message transfer methods in VS approach are considered which are essential for designing a practical framework for non-real-time, asynchronous data Communication, especially for large-sized message transfer. A logical architecture for implementation is also presented. Finally, the message transmission methods are examined using computer simulation.

Shinya Yamamura - One of the best experts on this subject based on the ideXlab platform.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Simulation Modelling Practice and Theory, 2011
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    Abstract We have proposed the concept of the virtual segment (VS), in which a global Communication Service is provided by combining a store–carry–forward scheme using vehicles with broadband wireless/wired network infrastructures along roads connected to the Internet. The VS can be a practical framework for non-real-time, asynchronous message transfer (especially for large messages) in a cost-effective manner. In this study, a critical implementation design issue, the message forward scheduling, in the VS approach is discussed and investigated through computer simulation by our developed VS simulator that has reflected the results of the field experiment for realistic performance evaluation.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Intelligent Networking and Collaborative Systems, 2009
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    In the Internet of the future, a flexible, dynamic combination of wireless and wired access networks is expected to be a key driver for enlarging the broadband Communication Service area. However, in general, the number of broadband wireless access points is limited due to their cost, and hence, they cannot cover the whole network. On the other hand, various message delivery schemes based on store-carry-forward routing with some extensions have been studied to support nonreal- time Communication in sparse or intermittent networks. However, Communication Services based solely on the storecarry- forward schemes covering a large area are inefficient because the delay time for message delivery increases in proportion to the size of the Service area. Therefore, to extend the Communication Service area with controllable performance in a cost-effective manner, the authors have proposed a concept of Virtual Segment (VS) in which global Communication Service is provided by combining a store-carry-forward scheme with broadband wireless/wired network infrastructures connected to the Internet to deploy the supplementary infrastructure. Along this line, in the present paper, the issues on the addressing and the message transfer methods in VS approach are considered which are essential for designing a practical framework for non-real-time, asynchronous data Communication, especially for large-sized message transfer. A logical architecture for implementation is also presented. Finally, the message transmission methods are examined using computer simulation.

Akira Nagata - One of the best experts on this subject based on the ideXlab platform.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Simulation Modelling Practice and Theory, 2011
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    Abstract We have proposed the concept of the virtual segment (VS), in which a global Communication Service is provided by combining a store–carry–forward scheme using vehicles with broadband wireless/wired network infrastructures along roads connected to the Internet. The VS can be a practical framework for non-real-time, asynchronous message transfer (especially for large messages) in a cost-effective manner. In this study, a critical implementation design issue, the message forward scheduling, in the VS approach is discussed and investigated through computer simulation by our developed VS simulator that has reflected the results of the field experiment for realistic performance evaluation.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Intelligent Networking and Collaborative Systems, 2009
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    In the Internet of the future, a flexible, dynamic combination of wireless and wired access networks is expected to be a key driver for enlarging the broadband Communication Service area. However, in general, the number of broadband wireless access points is limited due to their cost, and hence, they cannot cover the whole network. On the other hand, various message delivery schemes based on store-carry-forward routing with some extensions have been studied to support nonreal- time Communication in sparse or intermittent networks. However, Communication Services based solely on the storecarry- forward schemes covering a large area are inefficient because the delay time for message delivery increases in proportion to the size of the Service area. Therefore, to extend the Communication Service area with controllable performance in a cost-effective manner, the authors have proposed a concept of Virtual Segment (VS) in which global Communication Service is provided by combining a store-carry-forward scheme with broadband wireless/wired network infrastructures connected to the Internet to deploy the supplementary infrastructure. Along this line, in the present paper, the issues on the addressing and the message transfer methods in VS approach are considered which are essential for designing a practical framework for non-real-time, asynchronous data Communication, especially for large-sized message transfer. A logical architecture for implementation is also presented. Finally, the message transmission methods are examined using computer simulation.

Masato Tsuru - One of the best experts on this subject based on the ideXlab platform.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Simulation Modelling Practice and Theory, 2011
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    Abstract We have proposed the concept of the virtual segment (VS), in which a global Communication Service is provided by combining a store–carry–forward scheme using vehicles with broadband wireless/wired network infrastructures along roads connected to the Internet. The VS can be a practical framework for non-real-time, asynchronous message transfer (especially for large messages) in a cost-effective manner. In this study, a critical implementation design issue, the message forward scheduling, in the VS approach is discussed and investigated through computer simulation by our developed VS simulator that has reflected the results of the field experiment for realistic performance evaluation.

  • virtual segment store carry forward relay based support for wide area non real time data exchange
    Intelligent Networking and Collaborative Systems, 2009
    Co-Authors: Shinya Yamamura, Akira Nagata, Masato Tsuru, Hitomi Tamura
    Abstract:

    In the Internet of the future, a flexible, dynamic combination of wireless and wired access networks is expected to be a key driver for enlarging the broadband Communication Service area. However, in general, the number of broadband wireless access points is limited due to their cost, and hence, they cannot cover the whole network. On the other hand, various message delivery schemes based on store-carry-forward routing with some extensions have been studied to support nonreal- time Communication in sparse or intermittent networks. However, Communication Services based solely on the storecarry- forward schemes covering a large area are inefficient because the delay time for message delivery increases in proportion to the size of the Service area. Therefore, to extend the Communication Service area with controllable performance in a cost-effective manner, the authors have proposed a concept of Virtual Segment (VS) in which global Communication Service is provided by combining a store-carry-forward scheme with broadband wireless/wired network infrastructures connected to the Internet to deploy the supplementary infrastructure. Along this line, in the present paper, the issues on the addressing and the message transfer methods in VS approach are considered which are essential for designing a practical framework for non-real-time, asynchronous data Communication, especially for large-sized message transfer. A logical architecture for implementation is also presented. Finally, the message transmission methods are examined using computer simulation.

Nora Ni Loideain - One of the best experts on this subject based on the ideXlab platform.

  • eu law and mass internet metadata surveillance in the post snowden era
    2015
    Co-Authors: Nora Ni Loideain
    Abstract:

    Legal frameworks exist within democracies to prevent the misuse and abuse of personal data that law enforcement authorities obtain from private Communication Service providers. The fundamental rights to respect for private life and the protection of personal data underpin this framework within the European Union. Accordingly, the protection of the principles and safeguards required by these rights is key to ensuring that the oversight of State surveillance powers is robust and transparent. Furthermore, without the robust scrutiny of independent judicial review, the principles and safeguards guaranteed by these rights may become more illusory than real.Following the Edward Snowden revelations, major concerns have been raised worldwide regarding the legality, necessity and proportionality standards governing these laws. In 2014, the highest court in the EU struck down the legal framework that imposed a mandatory duty on Communication Service providers to undertake the mass retention of metadata for secret intelligence and law enforcement authorities across the EU. This article considers the impact of the Snowden revelations on this landmark judgment. Subsequently, the analysis explores the significance of this ruling for the future reform of EU law governing metadata surveillance and its contribution to the worldwide debate on blanket and covert monitoring in the post-Snowden era.

  • eu law and mass internet metadata surveillance in the post snowden era
    Media and Communication, 2015
    Co-Authors: Nora Ni Loideain
    Abstract:

    Legal frameworks exist within democracies to prevent the misuse and abuse of personal data that law enforcement authorities obtain from private Communication Service providers. The fundamental rights to respect for private life and the protection of personal data underpin this framework within the European Union. Accordingly, the protection of the principles and safeguards required by these rights is key to ensuring that the oversight of State surveillance powers is robust and transparent. Furthermore, without the robust scrutiny of independent judicial review, the principles and safeguards guaranteed by these rights may become more illusory than real. Following the Edward Snowden revelations, major concerns have been raised worldwide regarding the legality, necessity and proportionality standards governing these laws. In 2014, the highest court in the EU struck down the legal framework that imposed a mandatory duty on Communication Service providers to undertake the mass retention of metadata for secret intelligence and law enforcement authorities across the EU. This article considers the influence of the Snowden revelations on this landmark judgment. Subsequently, the analysis explores the significance of this ruling for the future reform of EU law governing metadata surveillance and its contribution to the worldwide debate on indiscriminate and covert monitoring in the post-Snowden era.