Satoshi Matsuura

• Nara Institute of Science and Technology

The routing efficiency of structured overlay networks depends on the consistency of pointers between nodes, where a pointer maps a node identifier to the corresponding address. This consistency can, however, break temporarily when some overlay nodes fail, since it takes time to repair the broken pointers in a distributed manner. Conventional soluti...

One of the most challenging fields in vehicular communications has been the experimental assessment of protocols and novel technologies. Researchers usually tend to simulate vehicular scenarios and/or partially validate new contributions in the area by using constrained testbeds and carrying out minor tests. In this line, the present work reviews t...

The experimental evaluation of wireless and mobile networks is a challenge that rarely substitutes simulation in research works. This statement is even more evident in vehicular communications, due to the equipment and effort needed to obtain significant and realistic results. In this paper, key issues in vehicular experimental evaluation are analy...

Resource discovery is an essential function for distributed mobile applications integrated in vehicular communication systems. Key requirements of the mobile resource discovery are wide-area geographic-based discovery and scalable resource discovery not only inside a vehicular ad-hoc network but also through the Internet. While a number of resource...

Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communications are expected to play an important role to improve road safety, road efficiency, and the comfort of road users. In order to support such ITS communications, IEEE standardized 802.11p amendment, which is adopted by ETSI as ITS-G5 for European usages. While much expectation ha...

As sensor and wireless network technologies are developed, it is expected that we will be able to gather lots of sensor data from various sensors on globe. Combining/ aggregating these sensor data, many useful applications could be developed. However, it is difficult to aggregate sensor data and secure scalability, because in some case too much sen...

This paper presents UTMesh - a testbed for wireless mesh networking and delay (or disruption) tolerant networking developed in the University of Tokyo. We have customized 51 embedded Linux computers for experiment-oriented use cases, and let them powered by rechargeable batteries in order to flexibly deploy everywhere depending on the experiment sc...

Due to the global spread of the Internet and the rapidly diminishing price of wireless sensors, a large number of heterogeneous sensor networks have been developed and interconnected around the globe for the sharing of sensing data on a global scale. Such data greatly affect our daily lives, such as environmental issues and business development. A...

Structured overlay networks are widely used as platforms for distributed systems. However, in a high churn situation, it is highly costly to maintain the structure and service availability of an overlay network because there is a limitation in churn handling. Several cooperation mechanisms among overlay networks are proposed to improve service avai...

In recent years, sensors have become smaller, more affordable, and widely used. Also, Internet spreads all over the globe, and made possible transfer large data instantly. Thereby, large scale weather sensor networks have been constructible. In this kind of sensor network, we need to consider load balancing, network redundancy, and reliability of s...

To handle ubiquitous sensor data, we have been developing a geographicallocation- based P2P network called “Mill”. In a ubiquitous sensing environment, data manipulation by users and sensing devices may have some characteristics. For example, sensor data are constantly generated and users keep getting these data in a particular region. When handlin...

SUMMARY With the rapid rise in the demand for location related service, communication devices such as PDAs or cellar phones must be able to search and manage information related to the geographical location. To leverage location-related infor- mation is useful to get an in-depth perspective on environmental circumstances, such as trac conditions or...

The Live E! project is an open research consortium among industry and academia to explore the platform to share the digital information related with the Earth and our living environment. We have getting a lot of low cost sensor nodes with Internet connectivity. The deployment of broadband and ubiquitous networks will enable autonomous and global di...

Development of sensor technology enables us to use lots of and detailed information. Then, it is difficult to deal with the vast number of information generated by sensors by client server model. In order to deal with data generated by sensors, we build a new information infrastructure on overlay network. In this paper, we propose an overlay networ...

The Live E! project is an open research consortium among industry and academia to explore the platform to share the digital information related with the earth and our living environment. We have getting a lot of low cost sensor nodes with Internet connectivity. The deployment of broadband and ubiquitous networks will enable autonomous and global di...

博士(Doctor) 工学(Engineering) 奈良先端科学技術大学院大学 博第735号 甲第735号