Keio University

Displaying 1-36 of 36 results

  • White Papers // Aug 2013

    Distinguishing Legitimate and Fake/Crude Antivirus Software

    Fake Anti-Virus (AV) software, a kind of malware, pretends to be a legitimate AV product and frightens computer users by showing fake security alerts, as if their computers were infected with malware. In addition, fake AV urges users to purchase a \"Commercial\" version of the fake AV. In this paper,...

    Provided By Keio University

  • White Papers // Dec 2012

    Combined Human, Antenna Orientation in Elevation Direction and Ground Effect on RSSI in Wireless Sensor Networks

    In this paper, the authors experimentally investigate the combined effect of human, antenna orientation in elevation direction and the ground effect on the Received Signal Strength Indicator (RSSI) parameter in the Wireless Sensor Network (WSN). In experiment, they use MICAz motes and consider different scenarios where antenna of the transmitter...

    Provided By Keio University

  • White Papers // Dec 2012

    RF Propagation Analysis of MICAz Mote's Antenna with Ground Effect

    In this paper, the authors analyzed the Radio Frequency (RF) propagation characteristics of monopole antenna in MICAz mote. During the experimental analysis, two scenarios are considered. In Scenario-I, a pair of MICAz nodes (one transmitting and one receiving node) are placed on the ground and the RSSI is measured in...

    Provided By Keio University

  • White Papers // Nov 2012

    Design Method of Relative Magnitude Coefficients Considering Rotation of Basis Vectors in Interference Space on the K-User MIMO Interference Channel for Downlink System

    Recently, to improve the capacity of cell-edge user, Interference Alignment (IA) is an intense research interest. The authors focus on the IA extended to the Multiple-Input Multiple-Output (MIMO) interference network. In this method, each coordinated transmitter generates the beamforming vector to align interference from different transmitters into confined subspace at...

    Provided By Keio University

  • White Papers // Sep 2012

    Monitoring the Dynamics of Network Traffic by Recursive Multi-Dimensional Aggregation

    A promising way to capture the characteristics of changing traffic is to extract significant flow clusters in traffic. However, clustering flows by 5-tuple requires flow matching in huge flow attribute spaces, and thus, is difficult to perform on the fly. The authors propose an efficient yet flexible flow aggregation technique...

    Provided By Keio University

  • White Papers // Sep 2012

    Is Linux Kernel Oops Useful or Not?

    Linux kernel oops is invoked when the kernel detects an erroneous state inside itself. It kills an offending process and allows Linux to continue its operation under a compromised reliability. The authors investigate how reliable Linux is after a kernel oops in this paper. To investigate the reliability after a...

    Provided By Keio University

  • White Papers // Jun 2012

    Hybrid Passive/Active Optical Access Network Architecture That Reduces OLT Power Consumption

    This paper proposes a power efficient optical access network architecture that reduces OLT power consumption. Several PON trees are aggregated thanks to waveguide optical switches with nano second-order switching speed. The proposed network dynamically activates/deactivates OLT according to ONU traffic load, and reduces OLT power use while maintaining transmission fairness....

    Provided By Keio University

  • White Papers // May 2012

    Epidemic Theory Based H + 1 Hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks

    In intermittently connected mobile ad hoc networks, how to guarantee the packet delivery ratio and reduce the transmission delay has become the new challenge for the researchers. Epidemic-theory based routing has shown the better performance in terms of improving packet delivery ratio and reducing the delay, when infinite node buffer...

    Provided By Keio University

  • White Papers // May 2012

    Bandwidth Scheduling Techniques in TDM-PON Supporting Inter-ONU Communication With Network Coding for Smart Grid Applications

    In next-generation Passive Optical Networks (PONs), the traffic exchanged among Optical Network Units (ONUs) belonging to the same PON, i.e. inter-ONU traffic, will increase because of emerging applications and services such as the smart grid. Applying Network Coding (NC) techniques to the inter-ONU traffic will improve throughput, security and reliability....

    Provided By Keio University

  • White Papers // Mar 2012

    How Hard Can It Be? Designing and Implementing a Deployable Multipath TCP

    Networks have become multipath: mobile devices have multiple radio interfaces, datacenters have redundant paths andmultihoming is the normfor big server farms. Meanwhile, TCP is still only single-path. Is it possible to extend TCP to enable it to support multiple paths for current applications on today's Internet? The answer is positive....

    Provided By Keio University

  • White Papers // Aug 2011

    Fast Fault Recovery Method with Preestablished Recovery Table for Reliable Wide Area Layer-2 Network

    Recently, wide area Ethernet, which provides virtual connections between company branches by using Ethernet technology, has become wide spread. Ethernet originally lacked fault recovery mechanisms required in Wide Area Networks (WANs) since it originated as Local Area Network (LAN) technology. Protection mechanism against link or node failure is proposed in...

    Provided By Keio University

  • White Papers // Jul 2011

    A New Model For Calculating Required Return On Investment

    It is widely accepted that the required return on investment is regarded as the weighted average cost of capital. The method for deciding whether an investment should be executed relies on the weighted average cost of capital; for example, NPV or IRR is presented in many textbooks as fundamental consideration....

    Provided By Keio University

  • White Papers // Jun 2011

    On-Demand Multicast Slot Allocation Scheme for Active Optical Access Network Using PLZT High-Speed Optical Switches

    This paper proposes an on-demand multicast slot allocation scheme for an active optical access network that uses Mach-Zehnder-type high-speed optical switches, which are achieved by the Plumbum Lanthanum Zirconate Titanate (PLZT) switching technology. The Active Optical Network, called ActiON, is based on slot-based switching. Compared to the Passive Optical Network...

    Provided By Keio University

  • White Papers // May 2011

    Improving Accuracy for Range-Based Localization in Multiple Target Wireless Sensor Networks

    The authors introduce a system for multiple target range-based localization systems, such as those based on Time-Of-Arrival (TOA) and Received Signal Strength Indicator (RSSI) for distance measurement estimations. In order to improve the accuracy of the location estimation for all target nodes, their system makes use of distance estimations between...

    Provided By Keio University

  • White Papers // May 2011

    Report On A Fact-Finding Survey Of The Credit-Decision System And Loan Pricing In Small Business Financing In Japan

    In this paper, the authors report the findings from an interview survey on the system and process of lending decisions and loan pricing, as well as the information that is used in such processes. The survey targeted 19 regional financial institutions, including regional banks and cooperative institutions in Japan. They...

    Provided By Keio University

  • White Papers // Dec 2010

    Complex Vertical FDI And Firm Heterogeneity: Evidence From East Asia

    In this paper, the authors statistically test the validity of the mechanics of complex Vertical Foreign Direct Investment (VFDI) in Japanese machinery FDI to East Asia by estimating a multiple-spatial lag model. From the theoretical viewpoint, in complex VFDI, the production activity of affiliates in a given country is positively...

    Provided By Keio University

  • White Papers // Dec 2010

    A Two-Dimensional Analysis Of The Impact Of Outward FDI On Performance At Home: Evidence From Japanese Manufacturing Firms

    This paper empirically investigates two areas of changes in firm behavior and performance at home before and after investing abroad. The first is the type of Foreign Direct Investment (FDI): horizontal FDI or vertical FDI. The second is the firm's domestic activities of interest: production activity and non-production activity. From...

    Provided By Keio University

  • White Papers // Oct 2010

    Context Reflector for Proxy Mobile IPv6

    Proxy Mobile IPv6 has been standardized as a network-based mobility management protocol in the IETF. To optimize mobile node's handover performance, a context of the mobile node such as its identifier, accounting, authentication and authorization states is expected to be transferred between mobility entities. This paper proposes a simple context...

    Provided By Keio University

  • White Papers // Apr 2010

    High-Energy Efficient Layer-3 Network Architecture based on Solitary Universal Cloud Router and Optical Aggregation Network

    The internet subscribers have been increasing 15% every year. At the end of 2009, it grew up 1802 million users, and the Internet traffic has been increasing dramatically too, and real-time traffic and routing statistics reaches about 14 Tbps. According to the progress of Internet, the power consumption of network...

    Provided By Keio University

  • White Papers // Mar 2010

    The Role Of Trade Cost In FDI Strategy In Heterogeneous Firms

    This paper attempts to clarify the reasons for the rapid growth of FDI in developing countries, particularly East Asian countries, compared with that of FDI to developed countries. To do this, the authors will examine the mechanics of HFDI and VFDI, in order to shed light on the role of...

    Provided By Keio University

  • White Papers // Feb 2010

    Stability Of International Production Networks: Is East Asia Special?

    Trade relationships built through production chains appear to be stable due to relation-specific nature of the transactions, compared with the usual transactions of goods sold on the open market. This paper aims to verify such stability of international production networks at the global level, with special emphasis on intra-East Asian...

    Provided By Keio University

  • White Papers // Sep 2009

    Newly Structured Router Network Architecture Using Cloud Control Plane and Forwarding Plane

    This paper proposes a novel network architecture called cloud control plane (Cloud C-plane) to reduce the power consumption of networks. In Cloud C-plane, the forwarding functions and control functions are decoupled, and the control functions are placed in the cloud. In addition, physical network topology is modified to improve the...

    Provided By Keio University

  • White Papers // Sep 2009

    How Does FDI Affect Performance At Home? An Activity-level Analysis For Japanese Electrical Machinery And Electronics Firms

    Focusing on firms from the electrical machinery and electronics industry, this paper investigates the impact of Foreign Direct Investment (FDI) on home productivity using activity-level data rather than, as most previous studies have done, firm-level data. Distinguishing between Horizontal and Vertical FDI (HFDI and VFDI), it is argued that VFDI...

    Provided By Keio University

  • White Papers // Jun 2009

    Security for Micro Server

    In recent years, the applications of ubiquitous sensors have become very important in the real world. However, it is dangerous if security crackers can access to the sensor nodes or micro servers because they can attack them. Therefore, the minimum security is needed in the ubiquitous sensor networks. Researchers have...

    Provided By Keio University

  • White Papers // Jun 2009

    Feedback-Controlled Server for Scheduling Aperiodic Tasks

    This paper proposes a scheduling scheme using feedback control to reduce the response time of aperiodic tasks with soft real-time constraints. The authors design an algorithm based on the proposed scheduling scheme and Total Bandwidth Server (TBS) that is a conventional server technique for scheduling aperiodic tasks. They then describe...

    Provided By Keio University

  • White Papers // Feb 2009

    Semi-Partitioned Fixed-Priority Scheduling on Multiprocessors

    In this paper, the authors present a new algorithm for fixed-priority scheduling of sporadic task systems on multiprocessors. The algorithm is categorized to such a scheduling class that qualifies a few tasks to migrate across processors, while most tasks are fixed to particular processors. They design the algorithm so that...

    Provided By Keio University

  • White Papers // Oct 2008

    Semi-Partitioning Technique for Multiprocessor Real-Time Scheduling

    A semi-partitioning technique is presented for efficient scheduling of sporadic task systems on multiprocessors. The presented technique performs in the same manner as the traditional partitioning, as long as tasks are successfully partitioned, but a task is allowed to be shared among multiple processors for its execution, if a spare...

    Provided By Keio University

  • White Papers // Sep 2008

    Global EDF-Based Scheduling with Efficient Priority Promotion

    In this paper, the authors present an algorithm, called Earliest Deadline Critical Laxity (EDCL), for the efficient scheduling of sporadic real-time tasks on multiprocessors systems. EDCL is a derivative of the Earliest Deadline Zero Laxity (EDZL) algorithm in that the priority of a job reaching certain laxity is imperiously promoted...

    Provided By Keio University

  • White Papers // Sep 2008

    Scheduling Aperiodic Tasks Using Total Bandwidth Server on Multiprocessors

    In this paper, the authors present real-time scheduling techniques for reducing the response time of aperiodic tasks scheduled with real-time periodic tasks on multiprocessor systems. Two problems are addressed in this paper: the scheduling of aperiodic tasks that can be dispatched to any processors when they arrive and the scheduling...

    Provided By Keio University

  • White Papers // Jun 2008

    New Abstraction for Optimal Real-Time Scheduling on Multiprocessors

    Optimal real-time scheduling algorithms realize efficient systems theoretically. They achieve the schedulable utilization bound which is equal to the system capacity. T-R Plane Abstraction (TRPA) proposed in this paper is an abstraction technique of real-time scheduling on multiprocessors. This paper presents that NNLF (No Nodal Laxity First) based on TRPA...

    Provided By Keio University

  • White Papers // Apr 2008

    Work-Conserving Optimal Real-Time Scheduling on Multiprocessors

    Extended T-N Plane Abstraction (E-TNPA) proposed in this paper realizes work-conserving and efficient optimal real-time scheduling on multiprocessors relative to the original T-N Plane Abstraction (TNPA). Additionally a scheduling algorithm named NVNLF (No Virtual Nodal Laxity First) is presented for E-TNPA. E-TNPA and NVNLF relax the restrictions of TNPA and...

    Provided By Keio University

  • White Papers // Mar 2008

    Global Rate-Monotonic Scheduling with Priority Promotion

    In this paper, the authors consider a multicore real-time scheduling algorithm incorporating benefits of both fixed-priority and dynamic-priority disciplines. Specifically, the algorithm first assigns globally-effective priorities to real-time tasks statically, based on the well-known Rate-Monotonic scheduling policy. It may however change the task priorities at runtime, only when the tasks...

    Provided By Keio University

  • White Papers // Feb 2008

    Energy-Efficient Optimal Real-Time Scheduling on Multiprocessors

    Optimal real-time scheduling is effective to not only schedulability improvement but also energy efficiency for real-time systems. In this paper, the authors propose Real-Time Static Voltage and Frequency Scaling (RT-SVFS) techniques based on an optimal real-time scheduling algorithm for multiprocessors. The techniques are theoretically optimal when the voltage and frequency...

    Provided By Keio University

  • White Papers // Jan 2008

    Portioned Static-Priority Scheduling on Multiprocessors

    In this paper, the authors propose an efficient real-time scheduling algorithm for multiprocessor platforms. The algorithm is a derivative of the Rate Monotonic (RM) algorithm, with its basis on the portioned scheduling technique. The theoretical design of the algorithms well implementable for practical use. The schedulability of the algorithm is...

    Provided By Keio University

  • White Papers // Jun 2007

    Real-Time Scheduling with Task Splitting on Multiprocessors

    In this paper, the authors present a real-time scheduling algorithm with high schedulability and few preemptions for multiprocessor systems. The algorithm is based on an unorthodox method called portioned scheduling that assigns each task to a particular processor like partitioned scheduling but can split a task into two processors if...

    Provided By Keio University

  • White Papers // Jun 2006

    Extended U-Link Scheduling to Increase the Execution Efficiency for SMT Real-Time Systems

    In this paper, the authors extend U-Link Scheduling to increase the average execution efficiency of the system. They first define the execution efficiency. Then they propose a new algorithm that establishes the co-scheduled sets where the execution efficiency can be increased. Also they present the static estimation of the execution...

    Provided By Keio University

  • White Papers // Sep 2012

    Monitoring the Dynamics of Network Traffic by Recursive Multi-Dimensional Aggregation

    A promising way to capture the characteristics of changing traffic is to extract significant flow clusters in traffic. However, clustering flows by 5-tuple requires flow matching in huge flow attribute spaces, and thus, is difficult to perform on the fly. The authors propose an efficient yet flexible flow aggregation technique...

    Provided By Keio University

  • White Papers // Sep 2012

    Is Linux Kernel Oops Useful or Not?

    Linux kernel oops is invoked when the kernel detects an erroneous state inside itself. It kills an offending process and allows Linux to continue its operation under a compromised reliability. The authors investigate how reliable Linux is after a kernel oops in this paper. To investigate the reliability after a...

    Provided By Keio University

  • White Papers // Nov 2012

    Design Method of Relative Magnitude Coefficients Considering Rotation of Basis Vectors in Interference Space on the K-User MIMO Interference Channel for Downlink System

    Recently, to improve the capacity of cell-edge user, Interference Alignment (IA) is an intense research interest. The authors focus on the IA extended to the Multiple-Input Multiple-Output (MIMO) interference network. In this method, each coordinated transmitter generates the beamforming vector to align interference from different transmitters into confined subspace at...

    Provided By Keio University

  • White Papers // Mar 2012

    How Hard Can It Be? Designing and Implementing a Deployable Multipath TCP

    Networks have become multipath: mobile devices have multiple radio interfaces, datacenters have redundant paths andmultihoming is the normfor big server farms. Meanwhile, TCP is still only single-path. Is it possible to extend TCP to enable it to support multiple paths for current applications on today's Internet? The answer is positive....

    Provided By Keio University

  • White Papers // Aug 2011

    Fast Fault Recovery Method with Preestablished Recovery Table for Reliable Wide Area Layer-2 Network

    Recently, wide area Ethernet, which provides virtual connections between company branches by using Ethernet technology, has become wide spread. Ethernet originally lacked fault recovery mechanisms required in Wide Area Networks (WANs) since it originated as Local Area Network (LAN) technology. Protection mechanism against link or node failure is proposed in...

    Provided By Keio University

  • White Papers // Sep 2009

    Newly Structured Router Network Architecture Using Cloud Control Plane and Forwarding Plane

    This paper proposes a novel network architecture called cloud control plane (Cloud C-plane) to reduce the power consumption of networks. In Cloud C-plane, the forwarding functions and control functions are decoupled, and the control functions are placed in the cloud. In addition, physical network topology is modified to improve the...

    Provided By Keio University

  • White Papers // Apr 2010

    High-Energy Efficient Layer-3 Network Architecture based on Solitary Universal Cloud Router and Optical Aggregation Network

    The internet subscribers have been increasing 15% every year. At the end of 2009, it grew up 1802 million users, and the Internet traffic has been increasing dramatically too, and real-time traffic and routing statistics reaches about 14 Tbps. According to the progress of Internet, the power consumption of network...

    Provided By Keio University

  • White Papers // Mar 2010

    The Role Of Trade Cost In FDI Strategy In Heterogeneous Firms

    This paper attempts to clarify the reasons for the rapid growth of FDI in developing countries, particularly East Asian countries, compared with that of FDI to developed countries. To do this, the authors will examine the mechanics of HFDI and VFDI, in order to shed light on the role of...

    Provided By Keio University

  • White Papers // Feb 2010

    Stability Of International Production Networks: Is East Asia Special?

    Trade relationships built through production chains appear to be stable due to relation-specific nature of the transactions, compared with the usual transactions of goods sold on the open market. This paper aims to verify such stability of international production networks at the global level, with special emphasis on intra-East Asian...

    Provided By Keio University

  • White Papers // Jun 2009

    Security for Micro Server

    In recent years, the applications of ubiquitous sensors have become very important in the real world. However, it is dangerous if security crackers can access to the sensor nodes or micro servers because they can attack them. Therefore, the minimum security is needed in the ubiquitous sensor networks. Researchers have...

    Provided By Keio University

  • White Papers // Jun 2009

    Feedback-Controlled Server for Scheduling Aperiodic Tasks

    This paper proposes a scheduling scheme using feedback control to reduce the response time of aperiodic tasks with soft real-time constraints. The authors design an algorithm based on the proposed scheduling scheme and Total Bandwidth Server (TBS) that is a conventional server technique for scheduling aperiodic tasks. They then describe...

    Provided By Keio University

  • White Papers // Dec 2010

    Complex Vertical FDI And Firm Heterogeneity: Evidence From East Asia

    In this paper, the authors statistically test the validity of the mechanics of complex Vertical Foreign Direct Investment (VFDI) in Japanese machinery FDI to East Asia by estimating a multiple-spatial lag model. From the theoretical viewpoint, in complex VFDI, the production activity of affiliates in a given country is positively...

    Provided By Keio University

  • White Papers // Dec 2010

    A Two-Dimensional Analysis Of The Impact Of Outward FDI On Performance At Home: Evidence From Japanese Manufacturing Firms

    This paper empirically investigates two areas of changes in firm behavior and performance at home before and after investing abroad. The first is the type of Foreign Direct Investment (FDI): horizontal FDI or vertical FDI. The second is the firm's domestic activities of interest: production activity and non-production activity. From...

    Provided By Keio University

  • White Papers // Jul 2011

    A New Model For Calculating Required Return On Investment

    It is widely accepted that the required return on investment is regarded as the weighted average cost of capital. The method for deciding whether an investment should be executed relies on the weighted average cost of capital; for example, NPV or IRR is presented in many textbooks as fundamental consideration....

    Provided By Keio University

  • White Papers // Sep 2009

    How Does FDI Affect Performance At Home? An Activity-level Analysis For Japanese Electrical Machinery And Electronics Firms

    Focusing on firms from the electrical machinery and electronics industry, this paper investigates the impact of Foreign Direct Investment (FDI) on home productivity using activity-level data rather than, as most previous studies have done, firm-level data. Distinguishing between Horizontal and Vertical FDI (HFDI and VFDI), it is argued that VFDI...

    Provided By Keio University

  • White Papers // May 2011

    Report On A Fact-Finding Survey Of The Credit-Decision System And Loan Pricing In Small Business Financing In Japan

    In this paper, the authors report the findings from an interview survey on the system and process of lending decisions and loan pricing, as well as the information that is used in such processes. The survey targeted 19 regional financial institutions, including regional banks and cooperative institutions in Japan. They...

    Provided By Keio University

  • White Papers // Jun 2011

    On-Demand Multicast Slot Allocation Scheme for Active Optical Access Network Using PLZT High-Speed Optical Switches

    This paper proposes an on-demand multicast slot allocation scheme for an active optical access network that uses Mach-Zehnder-type high-speed optical switches, which are achieved by the Plumbum Lanthanum Zirconate Titanate (PLZT) switching technology. The Active Optical Network, called ActiON, is based on slot-based switching. Compared to the Passive Optical Network...

    Provided By Keio University

  • White Papers // May 2011

    Improving Accuracy for Range-Based Localization in Multiple Target Wireless Sensor Networks

    The authors introduce a system for multiple target range-based localization systems, such as those based on Time-Of-Arrival (TOA) and Received Signal Strength Indicator (RSSI) for distance measurement estimations. In order to improve the accuracy of the location estimation for all target nodes, their system makes use of distance estimations between...

    Provided By Keio University

  • White Papers // Oct 2010

    Context Reflector for Proxy Mobile IPv6

    Proxy Mobile IPv6 has been standardized as a network-based mobility management protocol in the IETF. To optimize mobile node's handover performance, a context of the mobile node such as its identifier, accounting, authentication and authorization states is expected to be transferred between mobility entities. This paper proposes a simple context...

    Provided By Keio University

  • White Papers // Jun 2012

    Hybrid Passive/Active Optical Access Network Architecture That Reduces OLT Power Consumption

    This paper proposes a power efficient optical access network architecture that reduces OLT power consumption. Several PON trees are aggregated thanks to waveguide optical switches with nano second-order switching speed. The proposed network dynamically activates/deactivates OLT according to ONU traffic load, and reduces OLT power use while maintaining transmission fairness....

    Provided By Keio University

  • White Papers // May 2012

    Epidemic Theory Based H + 1 Hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks

    In intermittently connected mobile ad hoc networks, how to guarantee the packet delivery ratio and reduce the transmission delay has become the new challenge for the researchers. Epidemic-theory based routing has shown the better performance in terms of improving packet delivery ratio and reducing the delay, when infinite node buffer...

    Provided By Keio University

  • White Papers // May 2012

    Bandwidth Scheduling Techniques in TDM-PON Supporting Inter-ONU Communication With Network Coding for Smart Grid Applications

    In next-generation Passive Optical Networks (PONs), the traffic exchanged among Optical Network Units (ONUs) belonging to the same PON, i.e. inter-ONU traffic, will increase because of emerging applications and services such as the smart grid. Applying Network Coding (NC) techniques to the inter-ONU traffic will improve throughput, security and reliability....

    Provided By Keio University

  • White Papers // Dec 2012

    Combined Human, Antenna Orientation in Elevation Direction and Ground Effect on RSSI in Wireless Sensor Networks

    In this paper, the authors experimentally investigate the combined effect of human, antenna orientation in elevation direction and the ground effect on the Received Signal Strength Indicator (RSSI) parameter in the Wireless Sensor Network (WSN). In experiment, they use MICAz motes and consider different scenarios where antenna of the transmitter...

    Provided By Keio University

  • White Papers // Dec 2012

    RF Propagation Analysis of MICAz Mote's Antenna with Ground Effect

    In this paper, the authors analyzed the Radio Frequency (RF) propagation characteristics of monopole antenna in MICAz mote. During the experimental analysis, two scenarios are considered. In Scenario-I, a pair of MICAz nodes (one transmitting and one receiving node) are placed on the ground and the RSSI is measured in...

    Provided By Keio University

  • White Papers // Aug 2013

    Distinguishing Legitimate and Fake/Crude Antivirus Software

    Fake Anti-Virus (AV) software, a kind of malware, pretends to be a legitimate AV product and frightens computer users by showing fake security alerts, as if their computers were infected with malware. In addition, fake AV urges users to purchase a \"Commercial\" version of the fake AV. In this paper,...

    Provided By Keio University

  • White Papers // Sep 2008

    Global EDF-Based Scheduling with Efficient Priority Promotion

    In this paper, the authors present an algorithm, called Earliest Deadline Critical Laxity (EDCL), for the efficient scheduling of sporadic real-time tasks on multiprocessors systems. EDCL is a derivative of the Earliest Deadline Zero Laxity (EDZL) algorithm in that the priority of a job reaching certain laxity is imperiously promoted...

    Provided By Keio University

  • White Papers // Jan 2008

    Portioned Static-Priority Scheduling on Multiprocessors

    In this paper, the authors propose an efficient real-time scheduling algorithm for multiprocessor platforms. The algorithm is a derivative of the Rate Monotonic (RM) algorithm, with its basis on the portioned scheduling technique. The theoretical design of the algorithms well implementable for practical use. The schedulability of the algorithm is...

    Provided By Keio University

  • White Papers // Feb 2009

    Semi-Partitioned Fixed-Priority Scheduling on Multiprocessors

    In this paper, the authors present a new algorithm for fixed-priority scheduling of sporadic task systems on multiprocessors. The algorithm is categorized to such a scheduling class that qualifies a few tasks to migrate across processors, while most tasks are fixed to particular processors. They design the algorithm so that...

    Provided By Keio University

  • White Papers // Sep 2008

    Scheduling Aperiodic Tasks Using Total Bandwidth Server on Multiprocessors

    In this paper, the authors present real-time scheduling techniques for reducing the response time of aperiodic tasks scheduled with real-time periodic tasks on multiprocessor systems. Two problems are addressed in this paper: the scheduling of aperiodic tasks that can be dispatched to any processors when they arrive and the scheduling...

    Provided By Keio University

  • White Papers // Jun 2008

    New Abstraction for Optimal Real-Time Scheduling on Multiprocessors

    Optimal real-time scheduling algorithms realize efficient systems theoretically. They achieve the schedulable utilization bound which is equal to the system capacity. T-R Plane Abstraction (TRPA) proposed in this paper is an abstraction technique of real-time scheduling on multiprocessors. This paper presents that NNLF (No Nodal Laxity First) based on TRPA...

    Provided By Keio University

  • White Papers // Apr 2008

    Work-Conserving Optimal Real-Time Scheduling on Multiprocessors

    Extended T-N Plane Abstraction (E-TNPA) proposed in this paper realizes work-conserving and efficient optimal real-time scheduling on multiprocessors relative to the original T-N Plane Abstraction (TNPA). Additionally a scheduling algorithm named NVNLF (No Virtual Nodal Laxity First) is presented for E-TNPA. E-TNPA and NVNLF relax the restrictions of TNPA and...

    Provided By Keio University

  • White Papers // Feb 2008

    Energy-Efficient Optimal Real-Time Scheduling on Multiprocessors

    Optimal real-time scheduling is effective to not only schedulability improvement but also energy efficiency for real-time systems. In this paper, the authors propose Real-Time Static Voltage and Frequency Scaling (RT-SVFS) techniques based on an optimal real-time scheduling algorithm for multiprocessors. The techniques are theoretically optimal when the voltage and frequency...

    Provided By Keio University

  • White Papers // Jun 2007

    Real-Time Scheduling with Task Splitting on Multiprocessors

    In this paper, the authors present a real-time scheduling algorithm with high schedulability and few preemptions for multiprocessor systems. The algorithm is based on an unorthodox method called portioned scheduling that assigns each task to a particular processor like partitioned scheduling but can split a task into two processors if...

    Provided By Keio University

  • White Papers // Jun 2006

    Extended U-Link Scheduling to Increase the Execution Efficiency for SMT Real-Time Systems

    In this paper, the authors extend U-Link Scheduling to increase the average execution efficiency of the system. They first define the execution efficiency. Then they propose a new algorithm that establishes the co-scheduled sets where the execution efficiency can be increased. Also they present the static estimation of the execution...

    Provided By Keio University

  • White Papers // Mar 2008

    Global Rate-Monotonic Scheduling with Priority Promotion

    In this paper, the authors consider a multicore real-time scheduling algorithm incorporating benefits of both fixed-priority and dynamic-priority disciplines. Specifically, the algorithm first assigns globally-effective priorities to real-time tasks statically, based on the well-known Rate-Monotonic scheduling policy. It may however change the task priorities at runtime, only when the tasks...

    Provided By Keio University

  • White Papers // Oct 2008

    Semi-Partitioning Technique for Multiprocessor Real-Time Scheduling

    A semi-partitioning technique is presented for efficient scheduling of sporadic task systems on multiprocessors. The presented technique performs in the same manner as the traditional partitioning, as long as tasks are successfully partitioned, but a task is allowed to be shared among multiple processors for its execution, if a spare...

    Provided By Keio University