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Keio University
(27 results)-
Whitepapers
Hybrid Passive/Active Optical Access Network Architecture That Reduces OLT Power Consumption
June 1, 2012, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Newly Structured Router Network Architecture Using Cloud Control Plane and Forwarding Plane
September 11, 2009, 12:00am PDT
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...
Provided by Keio University
-
White Papers
High-Energy Efficient Layer-3 Network Architecture based on Solitary Universal Cloud Router and Optical Aggregation Network
April 28, 2010, 12:00am PDT
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...
Provided by Keio University
-
White Papers
The Role Of Trade Cost In FDI Strategy In Heterogeneous Firms
March 31, 2010, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Stability Of International Production Networks: Is East Asia Special?
February 1, 2010, 12:00am PST
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....
Provided by Keio University
-
White Papers
Security for Micro Server
June 12, 2009, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Feedback-Controlled Server for Scheduling Aperiodic Tasks
June 11, 2009, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Political Economy Of Public Capital Formation In Japan
December 1, 2008, 12:00am PST
This paper investigates public investment policy (mainly from the 1980s onwards) with a political-economic approach. The points of this paper are as follows. First, at the macro level, it is...
Provided by Keio University
-
White Papers
A Fine Grain Microprocessor Design Education Considering Situated Nature of Learning
June 1, 2008, 12:00am PDT
This paper proposes a new training method for instructing newcomers in the field of microprocessor design. By using this method, which is an extension of the method known as Legitimate Peripheral...
Provided by Keio University
-
White Papers
Evaluation of MuCCRA-D: A Dynamically Reconfigurable Processor With Directly Interconnected PEs
May 16, 2008, 12:00am PDT
Coarse-grained Dynamically Reconfigurable Processor Arrays (DRPAs) have been received an attention as a flexible and efficient o -loading engine for various types of System-on-Chips (SoCs)....
Provided by Keio University
-
White Papers
Dynamic Voltage and Frequency Scaling for Optimal Real-Time Scheduling on Multiprocessors
April 19, 2008, 12:00am PDT
Not only system performance but also energy efficiency is critically important for embedded systems. Optimal real-time scheduling is effective to not only schedulability improvement but also...
Provided by Keio University
-
White Papers
A New Model For Calculating Required Return On Investment
July 5, 2011, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Epidemic Theory Based H + 1 Hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks
May 24, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Bandwidth Scheduling Techniques in TDM-PON Supporting Inter-ONU Communication With Network Coding for Smart Grid Applications
May 24, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Combined Human, Antenna Orientation in Elevation Direction and Ground Effect on RSSI in Wireless Sensor Networks
December 18, 2012, 12:00am PST
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...
Provided by Keio University
-
Whitepapers
RF Propagation Analysis of MICAz Mote's Antenna with Ground Effect
December 18, 2012, 12:00am PST
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...
Provided by Keio University
-
Whitepapers
Monitoring the Dynamics of Network Traffic by Recursive Multi-Dimensional Aggregation
September 13, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Is Linux Kernel Oops Useful or Not?
September 11, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Design Method of Relative Magnitude Coefficients Considering Rotation of Basis Vectors in Interference Space on the K-User MIMO Interference Channel for Downlink System
November 21, 2012, 12:00am PST
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)...
Provided by Keio University
-
Whitepapers
How Hard Can It Be? Designing and Implementing a Deployable Multipath TCP
March 15, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Bit-wise Error Detection Based Iterative Signal Detection for OFDM MIMO Multiplexing
March 11, 2008, 12:00am PDT
Recently, the authors proposed an iterative modified QR-Decomposition based M-algorithm (QRD-M) using decoding results of Cyclic Redundancy Check (CRC) code for OFDM MIMO multiplexing. The...
Provided by Keio University
-
White Papers
Market Share Dynamics Based On The Emergence And Collapse Of Brand Values: Simulations Focusing On Communications Between Consumers
January 1, 2009, 12:00am PST
Prior research on brand equity or brand value has assumed that all products are the same in their functions but different in their marketing activities of firms. However, although the authors can...
Provided by Keio University
-
White Papers
On-Demand Multicast Slot Allocation Scheme for Active Optical Access Network Using PLZT High-Speed Optical Switches
June 14, 2011, 12:00am PDT
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...
Provided by Keio University
-
White Papers
How Large Is The "Hold Up" Cost Of Relationship Lending? Evidence From Main Bank-Small Firm Relationships In Japan
April 1, 2008, 12:00am PDT
Using the rich matched data set of Japanese firms and their main banks that contain both qualitative and quantitative information of firms and banks, the authors found that financially distressed...
Provided by Keio University
-
White Papers
Improving Accuracy for Range-Based Localization in Multiple Target Wireless Sensor Networks
May 17, 2011, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Context Reflector for Proxy Mobile IPv6
October 4, 2010, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
A New Tracking Method Using Image Sensor and Photo Diode for Visible Light Road-to-Vehicle Communication
February 20, 2008, 12:00am PST
The authors propose a new tracking method using IMaGe sensor (IMG) and Photo Diode (PD) for visible light road-to-vehicle communication. Proposed method uses an IMG with wide FOV, which receives...
Provided by Keio University
-
Whitepapers
Bit-wise Error Detection Based Iterative Signal Detection for OFDM MIMO Multiplexing
March 11, 2008, 12:00am PDT
Recently, the authors proposed an iterative modified QR-Decomposition based M-algorithm (QRD-M) using decoding results of Cyclic Redundancy Check (CRC) code for OFDM MIMO multiplexing. The...
Provided by Keio University
-
Whitepapers
How Hard Can It Be? Designing and Implementing a Deployable Multipath TCP
March 15, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Design Method of Relative Magnitude Coefficients Considering Rotation of Basis Vectors in Interference Space on the K-User MIMO Interference Channel for Downlink System
November 21, 2012, 12:00am PST
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)...
Provided by Keio University
-
Whitepapers
Is Linux Kernel Oops Useful or Not?
September 11, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Monitoring the Dynamics of Network Traffic by Recursive Multi-Dimensional Aggregation
September 13, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
RF Propagation Analysis of MICAz Mote's Antenna with Ground Effect
December 18, 2012, 12:00am PST
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...
Provided by Keio University
-
Whitepapers
Combined Human, Antenna Orientation in Elevation Direction and Ground Effect on RSSI in Wireless Sensor Networks
December 18, 2012, 12:00am PST
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...
Provided by Keio University
-
Whitepapers
Bandwidth Scheduling Techniques in TDM-PON Supporting Inter-ONU Communication With Network Coding for Smart Grid Applications
May 24, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Epidemic Theory Based H + 1 Hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks
May 24, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
Hybrid Passive/Active Optical Access Network Architecture That Reduces OLT Power Consumption
June 1, 2012, 12:00am PDT
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...
Provided by Keio University
-
Whitepapers
A New Tracking Method Using Image Sensor and Photo Diode for Visible Light Road-to-Vehicle Communication
February 20, 2008, 12:00am PST
The authors propose a new tracking method using IMaGe sensor (IMG) and Photo Diode (PD) for visible light road-to-vehicle communication. Proposed method uses an IMG with wide FOV, which receives...
Provided by Keio University
-
White Papers
Context Reflector for Proxy Mobile IPv6
October 4, 2010, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Improving Accuracy for Range-Based Localization in Multiple Target Wireless Sensor Networks
May 17, 2011, 12:00am PDT
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...
Provided by Keio University
-
White Papers
How Large Is The "Hold Up" Cost Of Relationship Lending? Evidence From Main Bank-Small Firm Relationships In Japan
April 1, 2008, 12:00am PDT
Using the rich matched data set of Japanese firms and their main banks that contain both qualitative and quantitative information of firms and banks, the authors found that financially distressed...
Provided by Keio University
-
White Papers
On-Demand Multicast Slot Allocation Scheme for Active Optical Access Network Using PLZT High-Speed Optical Switches
June 14, 2011, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Market Share Dynamics Based On The Emergence And Collapse Of Brand Values: Simulations Focusing On Communications Between Consumers
January 1, 2009, 12:00am PST
Prior research on brand equity or brand value has assumed that all products are the same in their functions but different in their marketing activities of firms. However, although the authors can...
Provided by Keio University
-
White Papers
A New Model For Calculating Required Return On Investment
July 5, 2011, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Dynamic Voltage and Frequency Scaling for Optimal Real-Time Scheduling on Multiprocessors
April 19, 2008, 12:00am PDT
Not only system performance but also energy efficiency is critically important for embedded systems. Optimal real-time scheduling is effective to not only schedulability improvement but also...
Provided by Keio University
-
White Papers
Evaluation of MuCCRA-D: A Dynamically Reconfigurable Processor With Directly Interconnected PEs
May 16, 2008, 12:00am PDT
Coarse-grained Dynamically Reconfigurable Processor Arrays (DRPAs) have been received an attention as a flexible and efficient o -loading engine for various types of System-on-Chips (SoCs)....
Provided by Keio University
-
White Papers
A Fine Grain Microprocessor Design Education Considering Situated Nature of Learning
June 1, 2008, 12:00am PDT
This paper proposes a new training method for instructing newcomers in the field of microprocessor design. By using this method, which is an extension of the method known as Legitimate Peripheral...
Provided by Keio University
-
White Papers
Political Economy Of Public Capital Formation In Japan
December 1, 2008, 12:00am PST
This paper investigates public investment policy (mainly from the 1980s onwards) with a political-economic approach. The points of this paper are as follows. First, at the macro level, it is...
Provided by Keio University
-
White Papers
Feedback-Controlled Server for Scheduling Aperiodic Tasks
June 11, 2009, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Security for Micro Server
June 12, 2009, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Stability Of International Production Networks: Is East Asia Special?
February 1, 2010, 12:00am PST
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....
Provided by Keio University
-
White Papers
The Role Of Trade Cost In FDI Strategy In Heterogeneous Firms
March 31, 2010, 12:00am PDT
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...
Provided by Keio University
-
White Papers
High-Energy Efficient Layer-3 Network Architecture based on Solitary Universal Cloud Router and Optical Aggregation Network
April 28, 2010, 12:00am PDT
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...
Provided by Keio University
-
White Papers
Newly Structured Router Network Architecture Using Cloud Control Plane and Forwarding Plane
September 11, 2009, 12:00am PDT
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...
Provided by Keio University
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