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In this letter, a 2-D Direction-of-Arrival (DoA) estimation scheme with cell searching is proposed for a mobile relay station (MRS) with uniform circular array (UCA) at a handover region. The proposed scheme of cell searching and DoA estimation for the MRS with UCA is robust even when there exist symbol timing offsets (STOs). Compared with the previous scheme, the proposed scheme can reduce computational...
In this paper, a Direction-of-Arrival (DoA) estimation scheme with cell searching is proposed for a mobile relay station (MRS) with uniform circular array (UCA) at handover region. The proposed scheme of cell searching and DoA estimation for the MRS with UCA is robust even when there exist symbol timing offsets (STOs). Compared with the previous scheme, the proposed scheme can reduce computational...
For the currently popular WiFi networks, the problem of communication blind spots is more acute, since the access points (APs) are not placed according to a central plan. In this paper, we design an Cyber physical system (CPS) based on an automatic mobile vehicle (AMV) to guarantee the quality of service (QoS) of real-time applications in WiFi networks. When a user enters the blind spot regions, the...
Cooperative collision warning, based on vehicle-to-vehicle radio communications and GPS systems, is one of the promising active safety applications that have attracted considerable research interest. In this paper, we address one of the functional key points of the cooperative collision warning application, which is an accurate estimation of the range data of neighboring vehicles during persistent...
Various vehicular communication technologies have been proposed to provide reliable and seamless wireless communications. Short-range vehicular communications can be established using IEEE 802.11p, and the range of these protocols can be extended using mobile multi-hop ad hoc networks. To provide consistent quality of service (QoS) with maximum achievable transmission rate, many algorithms assume...
Information on the location of the phones can be used to estimate the speed at which the phones are moving. By tracking the speed variability of a substantial number of cell phones over time, the traffic flow characteristics of various highways can be estimated. A traffic flow estimation algorithm is developed by exploiting the occurrences of mobile handover which simulations are conducted with realistic...
In this paper, a mobile relay station (MRS) for vehicles with beamforming antennas is considered to increase the reliability of transmission link, especially for the MRS at cell boundary. Joint methods for cell searching and DoA estimation are proposed to form a beam in the direction of target BS while nulling interferences from adjacent BSs, especially for IP- based cellular systems employing break-before-make...
This paper describes a study of an emergency earthquake warning system for land mobile vehicles using the Earthquake early warning in Japan, First, estimation accuracy of seismic wave is evaluated at a local area, when using both the position information and the soil information database in addition to the Earthquake early warning, and it is shown that using those additional information is effective...
The existing vehicular sensors of taxi companies in most of cities can be used for traffic monitoring, however sensors are always set with a long sampling interval because of communication cost saving and network congestion avoidance. In this paper, we focus on the traffic data processing in vehicular sensor networks providing sparse and incomplete information. A performance evaluation study has been...
An experiment / pilot to improve emission factor of the mobile transport carried out and the below results came up. For transportation sector inventory, we found that major user of the fuels in 1990 was auto-transportation. But this condition has changed and by 1996 the biggest user of fuels became the machinery and vehicles that used in mining sites using about 40 per cent of overall diesel consumption...
The following topics are dealt with: intelligent transportation systems; on-the-road mobile networks; traffic information; ad hoc networks; and vehicle guidance.
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