Toshiaki Osada

3D Symbiotic Environment for Agent-Aided Collaborative Work

Recently, collaborative work environments using Augmented Reality is expected to realize effective collaborative works. However, these environments have some limitations. One of the limitations is the restricted availability of devices. Devices which have no ability of the real-space information sensing cannot be used for these environments. Another limitation is low usability. It is difficult for novice computer users to utilize these environments, because these environments are specifically designed for computer professionals. To overcome these limitations, we propose a construction scheme of 3D symbiotic environment. 3D symbiotic environment is a collaborative work environment which is based on the concept of symbiosis between the real space and digital spaces. 3D symbiotic environment enables users to do collaborative works intuitively as if virtual spaces are integrated with the real space. First, we present the fundamental technologies for 3D symbiotic environment. Next, we show the design and implementation of the prototype system which includes collaborative work supporting agents. Finally, we confirmed the feasibility of 3D symbiotic environment with experimental results of the prototype system.

A Fair Load Sharing Scheme for Multi-source Multimedia Overlay Application Layer Multicast

IP multicasting is an efficient and scalable way to deliver high quality audio and video streams for group communication. However, widespread deployment of IP multicast is unlikely in near future and it requires substantial infrastructure modifications. For rapid deployment of multicast application, Application Layer Multicast (ALM) is an alternate choice to circumvent this situation, as it supports group communication independent of network layer support. Previous studies on ALM mainly focused on achieving high throughput for bandwidth intensive applications and unfairness of communication quality is still a serious issue in multi-source communication. In this paper, we present an autonomous distributed scheme to construct an ALM tree to improve fairness and overall communication quality among the participants in a multi-source multimedia communication. Extensive simulation and experimental results show that our proposed scheme increases the incoming bitrate of the lowest recipient among all the nodes, as well as improving fairness for all receivers.

A Classifiable Sub-Flow Selection Method for Traffic Classification in Mobile IP Networks

Traffic classification is an essential task for network management. Many researchers have paid attention to initial sub-flow features based classifiers for traffic classification. However, the existing classifiers cannot classify traffic effectively in mobile IP networks. The classifiers depend on initial sub-flows, but they cannot always capture the sub-flows at a point of attachment for a variety of elements because of seamless mobility. Thus the ideal classifier should be capable of traffic classification based on not only initial sub-flows but also various types of sub-flows. In this paper, we propose a classifiable sub-flow selection method to realize the ideal classifier. The experimental results are so far promising for this research direction, even though they are derived from a reduced set of general applications and under relatively simplifying assumptions. Altogether, the significant contribution is indicating the feasibility of the ideal classifier by selecting not only initial sub-flows but also transition sub-flows.

Traffic Classification in Mobile IP Network

Traffic classification is an essential task for network management. Thus many researchers have paid attention to initial sub-flow features based classifiers for achieving online traffic classification. However, the existing classifiers cannot classify traffic effectively in mobile IP network, because they cannot always capture the initial sub-flow when a communicating node moves and its point of attachment changes. Desirable classifier should thus be capable of traffic classification based on not only initial sub-flow but also various types of sub-flow. In this paper, we propose sub-flow selection with application behaviors, and the method solves a critical problem of how to select appropriate sub-flows for achieving traffic classification in mobile IP network. Although at a very early stage of development, the proposed method shows promising preliminary results through the experiments on a reduced set of applications.

3D collaboration environment based on real space and digital space symbiosis

In this paper, we propose 3D symbiotic collaboration environment which is based on concept of real and digital spaces symbiosis. Collaboration environments which are using Augmented Reality have been expected to realize effective collaborative works. However, the construction of these environments has a limitation, because devices which do not have an ability of sensing the real-space information cannot be used for these environments. To break this limitation, we propose the 3D symbiotic collaboration environment which enables users to do collaborative works intuitively as if 3D digital spaces united with the real space. In this paper, we present fundamental technologies for 3D symbiotic collaboration environment. In addition, we show the design and implementation of the prototype system, and confirm feasibility of 3D symbiotic collaboration environment with experimental results of the prototype system.

3D Symbiotic space for agent-aided collaborative work

In this paper, we propose 3D space which is based on concept of real and digital spaces symbiosis. Recently, collaborative work environments which are using Augmented Reality have been expected to realize effective collaborative works. However, these environments have some limitations. One of limitations is restricted availability of devices, and another limitation is low usability. Because of these limitations, it is difficult to utilize these environments, for general users. To break these limitations, we propose the construction scheme of 3D symbiotic space. Collaborative work environments based on 3D symbiotic space enable users to do collaborative works intuitively as if virtual spaces united with the real space. First, we present fundamental technologies for 3D symbiotic space. Next, we show the design and implementation of the agent-aided collaborative work environments based on 3D symbiotic space. Finally, we confirm feasibility of 3D symbiotic space with experimental results.

Agent-Aided 3D Symbiotic Space

In this paper, we propose 3D space which is based on concept of real and digital spaces symbiosis. Recently, collaborative work environments which are using Augmented Reality have been expected to realize effective collaborative works. However, these environments have some limitations. One limitations is restricted availability of devices, and another limitation is low usability. Because of these limitations, it is difficult to utilize these environments, for general users. To break these limitations, we propose the construction scheme of 3D symbiotic space. Collaborative work environments based on 3D symbiotic space enable users to do collaborative works intuitively as if virtual spaces united with the real space. First, we present fundamental technologies for 3D symbiotic space. Next, we show the design and implementation of the agent-aided collaborative work environments based on 3D symbiotic space. Finally, we confirm feasibility of 3D symbiotic space with experimental results.

3D Symbiotic Environment for Collaborative Work

Collaborative work environments which are using Augmented Reality have been expected to realize effective collaborative works. However, the construction of these environments has a limitation, because devices which do not have an ability of sensing the real-space information cannot be used for these environments. To break this limitation, we propose the construction scheme of 3D symbiotic environment. 3D symbiotic environment enables users to do collaborative works intuitively as if virtual spaces united with the real space. In this paper, we present fundamental technologies for 3D symbiotic environment. In addition, we show the design and implementation of the prototype system, and confirmed feasibility of 3D symbiotic environment with experimental results of the prototype system.