Kanada's papers

Kanada, Y., and Tarui, T., Poster, Network Virtualization Symposium 2014, July 2014. Network Virtualization Symposium 2013, September 2013.
[ 日本語のページ ]
[ Poster PDF file ]

Summary: A method for providing functions of VNode infrastructure switches, such as switching or routing, to slices is proposed. The plug-in interfaces and the interfaces for providing layer-3/VLAN switch functions to slices were designed, implemented, and evaluated.

Introduction to this research theme: Network virtualization

Kanada, Y., Procedia Computer Science, Vol. 34, pp. 661-667, 2014.
Kanada, Y., Workshop on Software Defined Networks for a New Generation of Applications and Services (SDN-NGAS 2014), August 2014, http://dx.doi.org/10.1016/j.procs.2014.07.094
[ 日本語のページ ]
[ Paper PDF file (Science Direct) ]
[ Paper PDF file (in this site) ]
[ Slides PDF file ]

Abstract: Although nodes in a network-virtualization infrastructure, which is called a virtualization node, usually contain a switch or a router with sophisticated and high-performance functions such as Ethernet switching, VLAN, and IP routing, most of such infrastructure functions cannot be reused as program components by slices. Accordingly, a method for providing such functions to slices on a virtualization node (VNode) infrastructure, by applying the previously proposed plug-in architecture, is proposed. This architecture defines two types of plug-ins, i.e., control plug-ins and data plug-ins, and interfaces for them. As for the proposed method, the switch or router in the VNode is regarded as a data plug-in, and a control plug-in that allocates and isolates the switch/router resources was developed. The data plug-in interface was customized to handle a data plug-in, i.e., a layer-3 switch in a VNode, and a control plug-in and the interfaces for providing layer-3/VLAN switch functions to slices were designed, implemented, and evaluated. The evaluation result shows that instead of specifying a routing/switching program or method, specifying only an additional 8 to 25 lines in a slice definition enables slice developers to use routing and switching functions.

Introduction to this research theme: Network virtualization

Kanada, Y., 22nd International Conference on Software, Telecommunications and Computer Networks (SoftCom 2014), September 2014, http://dx.doi.org/10.1109/softcom.2014.7039092
[ 日本語のページ ]
[ Paper PDF file ]
[ Slides PDF file ]

Abstract: A previously developed plug-in architecture for network-virtualization nodes allows network operators to introduce new types of virtual nodes and links and slice developers to use them in slices (i.e., virtual networks). In this paper, a method for extending network-virtualization infrastructures by introducing plug-ins to nodes in the infrastructure and a freely-designed plug-in-specific packet header, which enable sharing part of packet contents among the same type of plug-ins distributed in the infrastructure, is proposed. The header is inserted into every data packet handled by the nodes, but it is hidden from slices in a “clean virtualization” infrastructure. This method was applied to creation of a new type of virtual links with network-delay measurement function using a hidden timestamp in each packet. The timestamps do not affect slices; that is, conventional programs can be used in the slice for the measurement without modification. The method was evaluated by edge-to-edge delay measurements and the evaluation results show that it is suitable for developing new functions, including functions requiring wire- rate performance, in shared/public networks.

Introduction to this research theme: Network virtualization

Kanada, Y., IPSJ Summer Programming Symposium 2014 (in Japanese), 2014-8
[ 日本語のページ ]
[ Slides (Japanese PDF version, no movie) ]
[ Slides (Japanese Keynote version, with movie, for Macintosh) ]
[ Slides (English PDF version, no movie) ]
[ Slides (English Keynote version, with movie, for Macintosh) ]
[ Paper PDF file (in Japanese) ]
[ Printing process (YouTube) ]

[ “3D turtle graphics ” Python library and usage example ]

English version of this paper (IJERA)

Abstract: When creating forms by using a 3D printer, usually, a static (declarative) model designed by using a 3D CAD system is translated and sent to the printer. However, widely-used FDM-type 3D printers inputs a dynamical (procedural) program that describes control of motions of the print head and extrusion of the filament. If the program is expressed by a programming language or a library in a straight manner, 3D objects can be created by a method similar to turtle graphics. Such a library, “turtle 3D printing” library, which is open-source, was described by Python and used (tried). Although this problem has a problem that it cannot print in the air; however, if this problem is solved by an appropriate method, shapes drawn by 3D turtle graphics can be embodied by this method.

Introduction to this research theme: 3D shape formation technologies