Hiroyuki Hatano

A trial of navigation system using BLE beacon for sightseeing in traditional area of Nikko

We would like to explain the outline of a trial of navigation system using BLE beacon for sightseeing in traditional area of Nikko. We firstly explain the result of a research of characteristics of visitors to Nikko. From the questionnaire to visitors of Nikko, to support young people (20th) and foreigners by ICT is important. Especially to solve problems of transportation and to provide information of shopping and eating location are important. Also, to give them the culture and history in the approach to the Tosyogu-shrine is important. Then we designed a trial application that works with BLE beacon and performed trial to evaluate the usefulness of navigation system using BLE beacon for sightseeing in Nikko. We found that BLE beacon in outdoor worked well and if visitors are walking, they can find almost all beacons. If they move by bus, BLE beacon also work well.

A study on position tracking system for pedestrian navigation using location and sensor information

Recently, we can use various network connections at several location using mobile terminals. Services by using location information expand for the mobile terminals. For these services, we need to estimate the location of the moving mobile devices. It is well-known that we can use the GPS in order to obtain the absolute position of the terminal. On the other hand, we can employ dead-reckoning methods adopted by the conventional car navigation system using builtin sensors to obtain the relative movement of the terminal. The latest mobile terminals such as smart phone are equipped with some sensors to capture the behavior of the terminal. In this paper, we propose a new location estimation method which combines the absolute position information by the GPS with the relative movement information by the sensors. We evaluate the proposed method in terms of the estimation accuracy by field experiments when we adopt the Kalman filter algorithm by combining the absolute location and the relative movement information. From the results of our field experiments, we show that the proposed method using the sensor information outperforms the conventional one without it.

A comparative study on access control methods for ITS radio communications systems

CSMA/CA adopted for IVC essentially has a hidden station problem in which transmitted frames collide because a station cannot sense the frame from another one. The decentralized TDMA can reduce frame collision caused by the hidden station problem. There is room for comparative studies between CSMA/CA based on ARIB STD-T109 and the decentralized TDMA. In this paper, we compare performances of CSMA/CA with those of the decentralized TDMA in the hidden station environment by computer simulations. From the simulation results, we show that the decentralized TDMA outperforms CSMA/CA although the decentralized TDMA causes a constant delay time.IVCARIB STD-T109decentralized TDMA.hidden station environmentcomputer simulations.

A study on indoor position estimation based on fingerprinting using GPS signals

It is impossible to observe the Global Positioning System (GPS) signal traveling in Line of Sight (LOS) indoors. When the position is estimated by using Non-LOS GPS received signals, it results in serious positioning error because the conventional estimation method by the GPS supposes the GPS signals in LOS. However, we may observe reflected signals from the GPS satellites even if indoors. Thus, we consider that the reflected received signals are useful for a reference of the position estimation although it is impossible to directly estimate the position. Supposing that the Received Signal Strength Indicator (RSSI) of the GPS signal varies between locations, we create a database of the RSSI of the GPS signal in each location such as the well-known fingerprinting method. It is possible to estimate the user location by querying the database even if indoors. By experiments, we evaluate the proposed method and propose a shrink method for the database additionally. We show that the proposed method can estimate indoor location well enough.

A Study on a Protocol for Ad Hoc Network Based on Bluetooth Low Energy

In this chapter, we propose a new protocol to construct ad hoc network using Bluetooth Low Energy (BLE). Especially, we are focusing on using advertising packet of BLE to construct ad hoc network, since the reach of advertising packet of BLE is longer than ordinary Bluetooth and WiFi. We would like to use ad hoc network to develop support tool for disaster victims, especially disabled people, group management tool to keep safe during school trip or beacon network management for navigation. In this application, we have to consider power consumption and longer reach. To solve this problem, we designed an ad hoc network protocol to construct ad hoc network efficiently using advertising packet of BLE. We implemented this protocol on iOS and performed experiments using 9 terminals. As the result of experiments, the latency of end-to-end was 2.2 s and that of one hop was less than 0.3 s. We think that the result shows the feasibility to construct ad hoc network for our purpose.

Outdoor Studying System Using Bluetooth Low Energy Beacon—To Feel Cultural Sites

We investigated outdoor studying using Bluetooth Low Energy (BLE) beacons in Nikko, a world heritage site in Japan, in order to convey traditional cultural information to young students. A BLE beacon can supply information that is related to location. This information is used for many purposes such as e-learning and commercial applications. In this paper, we propose a new style of outdoor studying as a collaboration between outdoor studying and the local economy. Shops in the area supply students with vivid and seasonal information about the area. Over three years of research, we found our application caused students to remember the cultural sites. We also found that they came to value the area. Shop owners hence hope to benefit from this application. However, we also found some tendencies in students’ feelings about traveling in this process. This paper describes the results of our research from 2014 to 2016 using BLE beacons in Nikko. We describe several different scenarios using beacons and their results.

A study on estimation method of pedestrian's walking status for GPS positioning correction

It is important to develop pedestrians, convenience and safety for realizing ITS world. In recent years, navigation for pedestrians has been increased by spreading of smart phones. The GPS (Global Positioning System) is main stream to obtain users position information outdoors. However, positioning quality is poor in urban area. Then, the positioning reliability becomes worse. We can point out the following two problems. Firstly, the position information is shown on the sidewalk on the opposite side where the user is present although he does not cross the roadway. Secondly, despite the fact that he is not moving, the position information is shown as if the user is moving. Our purpose is to improve the above two problems. In this paper, we will propose two methods to estimate pedestrians behaviors on roads. One is to estimate the time of starting road crossing. Another is to estimate pedestrians state, that is moving or stopping. In this paper, we assume that the pedestrians is on the sidewalk of roads. Then, we will use a magnetic field sensor on the smartphone in order to estimate the above two pedestrians behaviors. And we will show the ability of the both methods.

A study on reliable position estimation in kinematic positioning for single frequency GNSS receiver

For realization of ITS (Intelligent Transport Systems) world, location information is one of important information because the accuracy of the position decides the quality of ITS services. Kinematic positioning has been attracting attention as a high-precision position estimation method of moving objects. However, the acquisition rate of FIX solutions fluctuates according to positioning parameters in the kinematic positioning. Especially, the FIX solutions include false FIX solutions. In this paper, we focus on the characteristics of the false FIX solutions and will propose the elimination method of the false FIX solutions by speed and altitude information. Further, we will present the improvement of true FIX solutions and reduction of the false FIX solutions by integrating the elimination of the false FIX solutions with parallelized processing which has different positioning parameters. Hereby, we can acquire extensively only the reliable positioning information and can be useful when integrate with other sensors. Also, by using the actual vehicle traveling data, the ability and the applicable range of the proposed method will be shown.

A Study of Precedent Retrieval System for Civil Trial

Recently, ICT has been adopted for use by the judiciaries in many countries such as Singapore and India, in response to the global changes in the economy and politics. It is urgently necessary for Japanese judiciary to adopt ICT to catch up with the global trend. For example, since almost all judicial records are stored as printed material, it is difficult to access them. Recently, limited number of record are opened on web site. UI for retrieving is not well designed for ordinary people. For example, they cannot search precedents with thing in action and what to prove to win.

A Study of Design Model for IoT System

A large amount of information is not always appealing to tourists. We developed a new application using Bluetooth Low Energy (BLE) beacons that not only provides a guide to a specific location but also provides the traditional customs and history of the area as an easter egg. In this paper, we discuss a system development process for IoT system of development of our sightseeing support system for IoT system. We extract the development model that is suitable for developing a service that uses devices embedded in environment and maintaining it.