The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The connectivity is one of the fundamental properties for wireless sensor networks (WSNs). However, because of the presence of Rayleigh fading channel and other unstable factors, it is difficult to study the wireless sensor network being connected. In this paper, we present a new approximate expression for lower bound of the conditional probability of the network being connected and obtain the whole...
Network connectivity is an important factor of the performance of wireless Ad hoc networks (WANETs) because it represents the lifetime that a node is connected to an arbitrary one. However, due to the dynamic networks, the connectivity is unstable. Under the WANETs, the influences of the connectivity are investigated. Although various models have been proposed to study the issues, the comparisons...
In order to achieve more efficient communication performances in vehicular ad hoc network (VANET) for road safety related message propagation, we propose a special nonbinary network coding scheme to improve the system reliability by reducing the outage probability of the communication system. Suppose all users in the network are provided with multiple antennas, which are responsible for message transmitting,...
Recently, due to the development of automobile industry, the number of vehicles is increasing. The traditional parking lots are unable to meet the growing demands from so many vehicles. Therefore, the current parking lots present many problems. Such as, can't find parking spaces quickly, difficult to manage too many vehicles and manual toll collection costs much time. To solve those problems above,...
In vehicular ad-hoc networks(VANETs), road services related messages are propagated by vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communications. So the connectivity of VANETs is one key factor to ensure the successfully message dissemination. However, due to the dynamic changing topology of VANETs, the lifetime of the links between vehicles is short. Therefore, it is necessary to...
This paper proposes an Optical-Radio (OR) relay scheme for urban road intersection safety message propagation under None-line-of-Sight (NLOS) scenario by employing Visible Light communication (VLC) and Radio Frequency (RF) communications. The proposed scheme is combined the radio channel and optical channel, and both the two channels are used for message propagation. If road intersection is equipped...
Intelligent Transportation System (ITS), the safety-related message is propagated based on the wireless communications through vehicle to vehicle (V2V) and vehicle to infrastructures (V2I) in vehicular Ad hoc networks (VANETs) environments. Hence, the network connectivity is a key requirement for successfully safety-related message propagation. In this paper, we analyze the influence of vehicle density...
In vehicular ad hoc networks, network coding and cooperative for message propagation have attracted considerable attention as ways to reduce the outage probability to improve the system performances. In this paper, we analyze the exact expression of outage probability and give an approximated expression over the Nakagami-m fading channel with dynamic network coding(DNC) and MIMO dynamic networks coding(MIMO-DNC)...
This paper presents a software platform for monitoring vehicles' CO2 emission in real time. By this platform, drivers can find the relationships between the vehicle CO2 emission amounts and their personal driving habits. Therefore, drivers can adjust their driving habits in real-time when viewing the real-time CO2 emission during the driving process. Besides, the drivers can check their speeds traces...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.