Nara Institute of Science and Technology

Displaying 1-10 of 10 results

  • White Papers // Oct 2012

    Packet Loss Rate Estimation with Active and Passive Measurements

    Network tomography is a problem of estimating network properties such as the packet loss rates of links using available packets. There are two kinds of methods to measure packets: active and passive. An active measurement specifies link information (paths) of packets a priori while a passive measurement gets only the...

    Provided By Nara Institute of Science and Technology

  • White Papers // Mar 2012

    Enabling Secure Multitenancy in Cloud Computing: Challenges and Approaches

    Cloud computing provides a multitenant feature that enables an IT asset to host multiple tenants, improving its utilization rate. The feature provides economic benefits to both users and service providers since it reduces the management cost and thus lowers the subscription price. Many users are, however, reluctant to subscribe to...

    Provided By Nara Institute of Science and Technology

  • White Papers // Jan 2011

    Taxonomical Approach to the Deployment of Traceback Mechanisms

    The development of cyber society has fostered the emergence of e-commerce, which is active with business and private transactions. Nevertheless, it also emboldened malicious activities that damage users' profit in the society. Among these activities, Distributed Denial of Services (DDoS), which imposes an excessive workload on network entities such as...

    Provided By Nara Institute of Science and Technology

  • White Papers // Sep 2010

    FU-JIN : A Cloud Computing Environment Visualization System for Specifying Points of Failure

    Distributed virtualization technologies in a cloud computing environment achieve high availability of computing resources and extend the scalability of application services. However, these technologies make it difficult to figure out data query paths and command paths in the cloud computing environment. To discover the points of failure in a cloud...

    Provided By Nara Institute of Science and Technology

  • White Papers // May 2010

    Capability-Aware Object Management Based on Skip List in Large-Scale Heterogeneous P2P Networks

    In this paper, the authors propose an object management method in large-scale heterogeneous P2P networks. In the proposed method, objects can be stored in and searched from nodes by considering node's capabilities. The proposed system is based on skip list, and two identifications are utilized; TypeID and HashID. The TypeID...

    Provided By Nara Institute of Science and Technology

  • White Papers // Mar 2010

    Dynamic Session Management Based on Reinforcement Learning in Virtual Server Environment

    In a virtualized server environment, machine resources such as CPU and memory are shared by multiple services. In such an environment, as the number of sessions for each service increases, the amount of resources that are utilized by the services increases. If thrashing occurs due to a lack of resources,...

    Provided By Nara Institute of Science and Technology

  • White Papers // Oct 2009

    A Reinforcement Learning-Based Lightpath Establishment for Service Differentiation in All-Optical WDM Networks

    In this paper, the authors propose a lightpath establishment method based on reinforcement learning for providing the service differentiation in all-optical WDM networks. In their proposed method, the optimal policy for the lightpath establishment is derived with Q-learning. With the derived policy, each node decides whether a lightpath establishment request...

    Provided By Nara Institute of Science and Technology

  • White Papers // Jun 2009

    Emulating Over 10K as Topology With Massive VM Multiplexing

    New technologies that will be introduced to the Internet should be practically tested for effectiveness and for side effects. A realistic environment that simulates the Internet is needed to experimentally test such technologies, which will be widely deployed on the Internet. To support experimentation in a realistic, Internet-like environment, the...

    Provided By Nara Institute of Science and Technology

  • White Papers // Apr 2009

    Transcasting: Cost-Efficient Video Multicast for Heterogeneous Mobile Terminals

    This paper presents a cost-efficient video multicast method for live video streaming to heterogeneous mobile terminals over a Content Delivery Network (CDN), where CDN consists of a video server, several proxies with wireless access points, and overlay links among the server and proxies. In this method, the original video sent...

    Provided By Nara Institute of Science and Technology

  • White Papers // Oct 2008

    Dynamic Channel Switching Based on Rank Accounting in IEEE 802.22 WRAN System With Fast Channel Switching Technology

    In this paper, the authors propose dynamic channel switching based on rank accounting so that WRAN systems can utilize channels effectively without strict coordination. In the proposed method, a base station in each WRAN cell has a ranking database where each rank denotes the usage frequency of channels. When the...

    Provided By Nara Institute of Science and Technology

  • White Papers // May 2010

    Capability-Aware Object Management Based on Skip List in Large-Scale Heterogeneous P2P Networks

    In this paper, the authors propose an object management method in large-scale heterogeneous P2P networks. In the proposed method, objects can be stored in and searched from nodes by considering node's capabilities. The proposed system is based on skip list, and two identifications are utilized; TypeID and HashID. The TypeID...

    Provided By Nara Institute of Science and Technology

  • White Papers // Oct 2009

    A Reinforcement Learning-Based Lightpath Establishment for Service Differentiation in All-Optical WDM Networks

    In this paper, the authors propose a lightpath establishment method based on reinforcement learning for providing the service differentiation in all-optical WDM networks. In their proposed method, the optimal policy for the lightpath establishment is derived with Q-learning. With the derived policy, each node decides whether a lightpath establishment request...

    Provided By Nara Institute of Science and Technology

  • White Papers // Oct 2012

    Packet Loss Rate Estimation with Active and Passive Measurements

    Network tomography is a problem of estimating network properties such as the packet loss rates of links using available packets. There are two kinds of methods to measure packets: active and passive. An active measurement specifies link information (paths) of packets a priori while a passive measurement gets only the...

    Provided By Nara Institute of Science and Technology

  • White Papers // Mar 2010

    Dynamic Session Management Based on Reinforcement Learning in Virtual Server Environment

    In a virtualized server environment, machine resources such as CPU and memory are shared by multiple services. In such an environment, as the number of sessions for each service increases, the amount of resources that are utilized by the services increases. If thrashing occurs due to a lack of resources,...

    Provided By Nara Institute of Science and Technology

  • White Papers // Jun 2009

    Emulating Over 10K as Topology With Massive VM Multiplexing

    New technologies that will be introduced to the Internet should be practically tested for effectiveness and for side effects. A realistic environment that simulates the Internet is needed to experimentally test such technologies, which will be widely deployed on the Internet. To support experimentation in a realistic, Internet-like environment, the...

    Provided By Nara Institute of Science and Technology

  • White Papers // Oct 2008

    Dynamic Channel Switching Based on Rank Accounting in IEEE 802.22 WRAN System With Fast Channel Switching Technology

    In this paper, the authors propose dynamic channel switching based on rank accounting so that WRAN systems can utilize channels effectively without strict coordination. In the proposed method, a base station in each WRAN cell has a ranking database where each rank denotes the usage frequency of channels. When the...

    Provided By Nara Institute of Science and Technology

  • White Papers // Apr 2009

    Transcasting: Cost-Efficient Video Multicast for Heterogeneous Mobile Terminals

    This paper presents a cost-efficient video multicast method for live video streaming to heterogeneous mobile terminals over a Content Delivery Network (CDN), where CDN consists of a video server, several proxies with wireless access points, and overlay links among the server and proxies. In this method, the original video sent...

    Provided By Nara Institute of Science and Technology

  • White Papers // Sep 2010

    FU-JIN : A Cloud Computing Environment Visualization System for Specifying Points of Failure

    Distributed virtualization technologies in a cloud computing environment achieve high availability of computing resources and extend the scalability of application services. However, these technologies make it difficult to figure out data query paths and command paths in the cloud computing environment. To discover the points of failure in a cloud...

    Provided By Nara Institute of Science and Technology

  • White Papers // Mar 2012

    Enabling Secure Multitenancy in Cloud Computing: Challenges and Approaches

    Cloud computing provides a multitenant feature that enables an IT asset to host multiple tenants, improving its utilization rate. The feature provides economic benefits to both users and service providers since it reduces the management cost and thus lowers the subscription price. Many users are, however, reluctant to subscribe to...

    Provided By Nara Institute of Science and Technology

  • White Papers // Jan 2011

    Taxonomical Approach to the Deployment of Traceback Mechanisms

    The development of cyber society has fostered the emergence of e-commerce, which is active with business and private transactions. Nevertheless, it also emboldened malicious activities that damage users' profit in the society. Among these activities, Distributed Denial of Services (DDoS), which imposes an excessive workload on network entities such as...

    Provided By Nara Institute of Science and Technology