The Experts below are selected from a list of 61566 Experts worldwide ranked by ideXlab platform

Soo-young Lee - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Channel Bandwidth variation on performance of individual messages in spatially and temporally heterogeneous communication networks
    Cluster Computing, 2009
    Co-Authors: Jun Huang, Soo-young Lee
    Abstract:

    As the domain of communication systems grows, heterogeneity among computers and subnetworks employed for a task also increases. Channel Bandwidth available for a message on a communication network varies with time and link. This variation can have a significant effect on performance of an individual message and also that of the network as a whole. Therefore, it is important to understand effects of Bandwidth heterogeneity on the network performance in order to optimally utilize a heterogeneous communication network. The ability to use such a network optimally is highly desirable in many applications such as network-based data-intensive high performance computing. The main goal of this paper is to analyze effects of temporal and spatial heterogeneity on performance of individual messages in detail via an extensive simulation, in terms of throughput, end-to-end delay, etc. Also, the problems of path selection and multi-path data transfer are considered to illustrate how the analysis results may be used in the future effort of optimizing the network performance by taking Channel Bandwidth heterogeneity into account.

  • ICPP - Effects of spatial and temporal heterogeneity of Channel Bandwidth on performance of individual messages in heterogeneous communication networks
    2004
    Co-Authors: Soo-young Lee, Jun Huang
    Abstract:

    Channel Bandwidth available for a message on a communication network varies with time and link. This variation (heterogeneity) can have a significant effect on performance of an individual message and also that of the network as a whole. Therefore, it is necessary to understand effects of Bandwidth heterogeneity on the network performance in order to optimally utilize a heterogeneous communication network. The ability to use such a network optimally is highly desirable in many applications such as network-based data-intensive high performance computing. The main goal of this study, as the first step toward developing effective schemes to utilize heterogeneous communication networks, is to analyze effects of temporal and spatial heterogeneity on performance of individual messages in detail via an extensive simulation, in terms of throughput, end-to-end delay, etc. Also, the problems of path selection and multipath data transfer are considered to illustrate how the analysis results may be used in the future effort of optimizing the network performance by taking Channel Bandwidth heterogeneity into account.

Chris J Mitchell - One of the best experts on this subject based on the ideXlab platform.

  • overcoming Channel Bandwidth constraints in secure sim applications
    Information Security Conference, 2005
    Co-Authors: John A Macdonald, W G Sirett, Chris J Mitchell
    Abstract:

    In this paper we present an architecture based on a Java (J2SE, J2EE, J2ME and Java Card) platform supporting a secure Channel from a Mobile Operator to the SIM card. This Channel offers the possibility of end to end security for delivery of large data files to a GSM SIM card. Such a secure Channel could be used for delivery of high value content that requires a high Bandwidth Channel — perhaps either rendered for user infotainment, or processed in the client Mobile Station (device and SIM card) for remote device management. Our methodology overcomes the Bandwidth constraints of the SIM Toolkit Security scheme described in GSM standard 03.48. To validate our proposal we have developed code to create DRM and Web Service test scenarios utilising readily available J2ME, Java Card, J2SE and J2EE platforms, Web Services tools from Apache, the KToolBar emulator from Sun, and a Gemplus Java Card.

  • SEC - Overcoming Channel Bandwidth Constraints in Secure SIM Applications
    Security and Privacy in the Age of Ubiquitous Computing, 2005
    Co-Authors: John A Macdonald, W G Sirett, Chris J Mitchell
    Abstract:

    In this paper we present an architecture based on a Java (J2SE, J2EE, J2ME and Java Card) platform supporting a secure Channel from a Mobile Operator to the SIM card. This Channel offers the possibility of end to end security for delivery of large data files to a GSM SIM card. Such a secure Channel could be used for delivery of high value content that requires a high Bandwidth Channel — perhaps either rendered for user infotainment, or processed in the client Mobile Station (device and SIM card) for remote device management. Our methodology overcomes the Bandwidth constraints of the SIM Toolkit Security scheme described in GSM standard 03.48. To validate our proposal we have developed code to create DRM and Web Service test scenarios utilising readily available J2ME, Java Card, J2SE and J2EE platforms, Web Services tools from Apache, the KToolBar emulator from Sun, and a Gemplus Java Card.

Jun Huang - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Channel Bandwidth variation on performance of individual messages in spatially and temporally heterogeneous communication networks
    Cluster Computing, 2009
    Co-Authors: Jun Huang, Soo-young Lee
    Abstract:

    As the domain of communication systems grows, heterogeneity among computers and subnetworks employed for a task also increases. Channel Bandwidth available for a message on a communication network varies with time and link. This variation can have a significant effect on performance of an individual message and also that of the network as a whole. Therefore, it is important to understand effects of Bandwidth heterogeneity on the network performance in order to optimally utilize a heterogeneous communication network. The ability to use such a network optimally is highly desirable in many applications such as network-based data-intensive high performance computing. The main goal of this paper is to analyze effects of temporal and spatial heterogeneity on performance of individual messages in detail via an extensive simulation, in terms of throughput, end-to-end delay, etc. Also, the problems of path selection and multi-path data transfer are considered to illustrate how the analysis results may be used in the future effort of optimizing the network performance by taking Channel Bandwidth heterogeneity into account.

  • ICPP - Effects of spatial and temporal heterogeneity of Channel Bandwidth on performance of individual messages in heterogeneous communication networks
    2004
    Co-Authors: Soo-young Lee, Jun Huang
    Abstract:

    Channel Bandwidth available for a message on a communication network varies with time and link. This variation (heterogeneity) can have a significant effect on performance of an individual message and also that of the network as a whole. Therefore, it is necessary to understand effects of Bandwidth heterogeneity on the network performance in order to optimally utilize a heterogeneous communication network. The ability to use such a network optimally is highly desirable in many applications such as network-based data-intensive high performance computing. The main goal of this study, as the first step toward developing effective schemes to utilize heterogeneous communication networks, is to analyze effects of temporal and spatial heterogeneity on performance of individual messages in detail via an extensive simulation, in terms of throughput, end-to-end delay, etc. Also, the problems of path selection and multipath data transfer are considered to illustrate how the analysis results may be used in the future effort of optimizing the network performance by taking Channel Bandwidth heterogeneity into account.

Vaduvur Bharghavan - One of the best experts on this subject based on the ideXlab platform.

  • a new model for packet scheduling in multihop wireless networks
    ACM IEEE International Conference on Mobile Computing and Networking, 2000
    Co-Authors: Songwu Lu, Vaduvur Bharghavan
    Abstract:

    The goal of packet scheduling disciplines is to achieve fair and maximum allocation of Channel Bandwidth. However, these two criteria can potentially be in conflict in a generic-topology multihop wireless network where a single logical Channel is shared among multiple contending flows and spatial reuse of the Channel Bandwidth is possible. In this paper, we propose a new model for packet scheduling that addresses this conflict. The main results of this paper are the following: (a) a two-tier service model that provides a minimum “fair” allocation of the Channel Bandwidth for each packet flow and additionally maximizes spatial reuse of Bandwidth, (b) an ideal centralized packet scheduling algorithm that realizes the above service model, and (c) a practical distributed backoff-based Channel contention mechanism that approximates the ideal service within the framework of the CSMA/CA protocol.

  • MobiCom - A new model for packet scheduling in multihop wireless networks
    Proceedings of the 6th annual international conference on Mobile computing and networking - MobiCom '00, 2000
    Co-Authors: Haiyun Luo, Vaduvur Bharghavan
    Abstract:

    The goal of packet scheduling disciplines is to achieve fair and maximum allocation of Channel Bandwidth. However, these two criteria can potentially be in conflict in a generic-topology multihop wireless network where a single logical Channel is shared among multiple contending flows and spatial reuse of the Channel Bandwidth is possible. In this paper, we propose a new model for packet scheduling that addresses this conflict. The main results of this paper are the following: (a) a two-tier service model that provides a minimum “fair” allocation of the Channel Bandwidth for each packet flow and additionally maximizes spatial reuse of Bandwidth, (b) an ideal centralized packet scheduling algorithm that realizes the above service model, and (c) a practical distributed backoff-based Channel contention mechanism that approximates the ideal service within the framework of the CSMA/CA protocol.

John A Macdonald - One of the best experts on this subject based on the ideXlab platform.

  • overcoming Channel Bandwidth constraints in secure sim applications
    Information Security Conference, 2005
    Co-Authors: John A Macdonald, W G Sirett, Chris J Mitchell
    Abstract:

    In this paper we present an architecture based on a Java (J2SE, J2EE, J2ME and Java Card) platform supporting a secure Channel from a Mobile Operator to the SIM card. This Channel offers the possibility of end to end security for delivery of large data files to a GSM SIM card. Such a secure Channel could be used for delivery of high value content that requires a high Bandwidth Channel — perhaps either rendered for user infotainment, or processed in the client Mobile Station (device and SIM card) for remote device management. Our methodology overcomes the Bandwidth constraints of the SIM Toolkit Security scheme described in GSM standard 03.48. To validate our proposal we have developed code to create DRM and Web Service test scenarios utilising readily available J2ME, Java Card, J2SE and J2EE platforms, Web Services tools from Apache, the KToolBar emulator from Sun, and a Gemplus Java Card.

  • SEC - Overcoming Channel Bandwidth Constraints in Secure SIM Applications
    Security and Privacy in the Age of Ubiquitous Computing, 2005
    Co-Authors: John A Macdonald, W G Sirett, Chris J Mitchell
    Abstract:

    In this paper we present an architecture based on a Java (J2SE, J2EE, J2ME and Java Card) platform supporting a secure Channel from a Mobile Operator to the SIM card. This Channel offers the possibility of end to end security for delivery of large data files to a GSM SIM card. Such a secure Channel could be used for delivery of high value content that requires a high Bandwidth Channel — perhaps either rendered for user infotainment, or processed in the client Mobile Station (device and SIM card) for remote device management. Our methodology overcomes the Bandwidth constraints of the SIM Toolkit Security scheme described in GSM standard 03.48. To validate our proposal we have developed code to create DRM and Web Service test scenarios utilising readily available J2ME, Java Card, J2SE and J2EE platforms, Web Services tools from Apache, the KToolBar emulator from Sun, and a Gemplus Java Card.