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Osaka University
(96 results)-
White Papers
Performance Evaluation and Improvement of Hybrid TCP Congestion Control Mechanisms in Wireless LAN Environment
September 29, 2008, 12:00am PDT
In this paper, the authors first evaluate the performance of recent TCP variants for high-speed and long-delay networks in IEEE 802.11 wireless LAN environment through simulation experiments. They...
Provided by Osaka University
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White Papers
Robust Virtual Network Topology Control Based on Attractor Selection
January 8, 2009, 12:00am PST
The growth of the Internet and emerging application layer technologies causes numerous changes in network environments. Therefore, it becomes important to achieve robust methods of controlling...
Provided by Osaka University
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White Papers
An Integrated Routing Mechanism for Cross-Layer Traffic Engineering in IP Over WDM Networks
July 30, 2007, 12:00am PDT
One approach to accommodating IP traffic on a Wavelength Division Multiplexing (WDM) network is to construct a logical topology, establishing a set of lightpaths between nodes. The lightpaths...
Provided by Osaka University
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White Papers
Modeling of an Online TV Recording Service
August 23, 2007, 12:00am PDT
Recently, new services have emerged which utilize the Internet as a delivery mechanism for multimedia content. With the advent of broadband accesses, more users are willing to download large...
Provided by Osaka University
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White Papers
Identification of Attack Nodes From Traffic Matrix Estimation
June 12, 2007, 12:00am PDT
Distributed Denial-of-Service attacks on public servers have recently become more serious. The most effective way to prevent this type of traffic is to identify the attack nodes and detach (or...
Provided by Osaka University
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White Papers
Proposal of an Assured Corridor Mechanism for Urgent Information Transmission in Wireless Sensor Networks
May 28, 2007, 12:00am PDT
Wireless sensor networks are expected to play an essential role as a social infrastructure to realize the people safe and secure living environment. In such a network, critical information must be...
Provided by Osaka University
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White Papers
A Proxy Caching System for MPEG-4 Video Streaming With a Quality Adaptation Mechanism
February 5, 2008, 12:00am PST
In this paper, the authors propose, design, implement, and evaluate a proxy caching system for MPEG- 4 video streaming services for heterogeneous users. In their system, a video stream is divided...
Provided by Osaka University
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White Papers
Router Buffer Re-Sizing for Short-Lived TCP Flows
July 10, 2007, 12:00am PDT
Traditionally, the size of router buffers is determined by the bandwidth-delay product discipline (normal discipline), which is the product of the link bandwidth and average Round-Trip Time (RTT)...
Provided by Osaka University
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White Papers
A Bio-Inspired Robust Routing Protocol for Mobile Ad Hoc Networks
August 1, 2007, 12:00am PDT
In this paper, the authors discuss robustness issues of a biologically inspired routing protocol for mobile ad hoc networks and the influence it has on the Quality of Service (QoS) in the system....
Provided by Osaka University
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White Papers
Protection Mechanisms for Well-Behaved TCP Flows From Tampered-TCP at Edge Routers
May 24, 2007, 12:00am PDT
In this paper, the authors propose a new mechanism which detects tampered-TCP connections at edge routers and protects well-behaved TCP connections from the tampered-TCP connections, resulting in...
Provided by Osaka University
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White Papers
Modeling of P2P File Sharing With a Level-Dependent QBD Process
July 2, 2007, 12:00am PDT
In this paper, the authors propose to analyze a Peer-To-Peer (P2P) file sharing system by means of a so-called level-dependent Quasi-Birth-and-Death (QBD) process. They consider the dissemination...
Provided by Osaka University
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White Papers
Rate-Based Pacing for Optical Packet Switched Networks With Very Small Optical RAM
August 2, 2007, 12:00am PDT
The authors show that by applying rate-based pacing at the edge nodes, very small optical RAM buffers can be enough for high utilization and low packet drop ratio inside core Optical...
Provided by Osaka University
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White Papers
On the Stability of Virtual Network Topology Control for Overlay Routing Services
February 18, 2008, 12:00am PST
Overlay networks achieve new functionality and enhance network performance by allowing routing to be controlled at the application layer. However, these approaches result in degradations of...
Provided by Osaka University
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White Papers
Trade-Off Between Reliability and Energy Cost for Content-Rich Data Transmission in Wireless Sensor Networks
January 1, 2012, 12:00am PST
In wireless sensor networks, the power of energy-constrained sensor nodes is largely drained by data communication tasks. Designing energy-efficient data communication mechanisms is, therefore, a...
Provided by Osaka University
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White Papers
Geographic Multipath Routing in Duty-Cycled Wireless Sensor Networks: One-Hop or Two-Hop?
August 17, 2011, 12:00am PDT
This paper proposes a novel 2-hop geographic multipath routing algorithm TPGFplus in energy consumption balanced duty-cycled WSNs. Analysis and simulation results show that TPGFPlus outperforms...
Provided by Osaka University
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Whitepapers
Proposal of a Reaction-Diffusion Based Congestion Control Method for Wireless Mesh Networks
February 20, 2008, 12:00am PST
This paper proposes a congestion control method for a wireless mesh network. Each intermediate node has separate transmission buffers for each of next hop nodes. By following the mathematical...
Provided by Osaka University
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White Papers
Multi-Project Software Engineering: An Example
January 1, 2010, 12:00am PST
In this paper authors present an approach for developers to benefit from multi-project software knowledge. As authors show in this paper, this can be achieved by gathering information about how...
Provided by Osaka University
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White Papers
A Grid Environment for Data Integration of Scientific Databases
January 1, 2010, 12:00am PST
Effective integration of heterogeneous data sources has been studied as the most pressing challenge in various fields; such as, high energy physics, astronomy, and life sciences. In this talk,...
Provided by Osaka University
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White Papers
Stability of Virtual Network Topology Control for Overlay Routing Services
July 1, 2008, 12:00am PDT
Initiating a discussion on the stability provided by Virtual Network Topology (VNT) control for overlay networks that are able to provide dynamic routing updates, this paper finds that the...
Provided by Osaka University
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White Papers
On Network Architecture for Realizing Group-Based Communication
December 17, 2007, 12:00am PST
This paper proposes a network architecture for realizing a group-based communication to solve issues of the Internet such as lack of security and low information S/N (Signal to Noise) ratio. The...
Provided by Osaka University
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White Papers
Performance of an Input/Output Buffered Type ATM LAN Switch With Back-Pressure Function
November 16, 2007, 12:00am PST
An ATM switch with both input and output buffers provided with a back-pressure function has been proposed as a cost-effective switch architecture. The back-pressure function prohibits cell...
Provided by Osaka University
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White Papers
Ring-Based Virtual Private Network Supporting a Large Number of VPNs
November 16, 2007, 12:00am PST
This paper proposes a simple but effective VPN mechanism called RING-VPN (Ring-based Virtual Private Network) that realizes a high scalability in terms of the number of VPNs. The key idea of the...
Provided by Osaka University
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White Papers
Scalable IP-VPN Flow Control Mechanism Supporting Arbitrary Fairness Criteria
November 16, 2007, 12:00am PST
In recent years, IP-based Virtual Private Networks (IP-VPNs), which provide a virtual privately owned network over an IP network, have attracted attention. With existing IP-VPNs, however, there is...
Provided by Osaka University
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White Papers
On Layered VPN Architecture for Enabling User-Based Multiply Associated VPNs
November 16, 2007, 12:00am PST
This paper proposes a layered VPN architecture for realizing user-based multiply associated VPN. This layered VPN architecture consists of three network levels such as PNL (Physical Network...
Provided by Osaka University
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White Papers
A Prototype Implementation of VPN Enabling User-Based Multiple Association
November 16, 2007, 12:00am PST
In this paper author implement a prototype system of a VPN that enables users to be associated with multiple VPNs using existing network technologies for demonstrating the feasibility of the...
Provided by Osaka University
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White Papers
Parameter Tuning of Rate-Based Congestion Control Algorithms and Its Application to TCP Over ABR
November 16, 2007, 12:00am PST
In this paper, the rate-based congestion control algorithm that has been standardized in the ATM Forum is evaluated. Its behavior is analyzed by utilizing a first-order fluid approximation to...
Provided by Osaka University
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White Papers
Congestion Propagation Among Routers in the Internet
November 16, 2007, 12:00am PST
In recent years, various non-linear phenomena of the Internet have been discovered. For instance, it is reported that congestion of a router propagates to neighboring routers like a wave. Several...
Provided by Osaka University
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White Papers
A Control Theoretical Approach to a Window-Based Flow Control Mechanism With Explicit Congestion Notification
November 16, 2007, 12:00am PST
A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in current TCP/IP networks. Recently proposed TCP Vegas is another version...
Provided by Osaka University
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White Papers
On Parameter Tuning of Data Transfer Protocol GridFTP for Wide-Area Grid Computing
November 16, 2007, 12:00am PST
In wide-area Grid computing, geographically distributed computational resources are connected for enabling efficient and large-scale scientific/engineering computations. In the wide-area Grid...
Provided by Osaka University
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White Papers
A Window-Based Flow Control Mechanism Based on TCP Vegas With Explicit Congestion Notification
November 16, 2007, 12:00am PST
A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in TCP/IP networks. Recently proposed TCP Vegas is another version of the...
Provided by Osaka University
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White Papers
Analysis of a Window-Based Flow Control Mechanism Based on TCP Vegas in Heterogeneous Network Environment
November 16, 2007, 12:00am PST
Another version of TCP called TCP Vegas has been proposed and studied in the literature. It can achieve better performance than the current TCP Reno. In the previous studies, steady-state behavior...
Provided by Osaka University
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White Papers
Understanding TCP Over TCP: Effects of TCP Tunneling on End-to-End Throughput and Latency
November 16, 2007, 12:00am PST
TCP tunnel is a technology that aggregates and transfers packets sent between end hosts as a single TCP connection. By using a TCP tunnel, the fairness among aggregated flows can be improved and...
Provided by Osaka University
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