Requirement analysis for building practical accident warning systems based on vehicular ad-hoc networks

An Accident Warning System (AWS) is a safety application that provides collision avoidance notifications for next generation vehicles whilst Vehicular Ad-hoc Networks (VANETs) provide the communication functionality to exchange these notifi- cations. Despite much previous research, there is little agreement on the requirements for accident warning systems. In order to build a practical warning system, it is important to ascertain the system requirements, information to be exchanged, and protocols needed for communication between vehicles. This paper presents a practical model of an accident warning system by stipulating the requirements in a realistic manner and thoroughly reviewing previous proposals with a view to identify gaps in this area

Low Power system Design techniques for mobile computers

Portable products are being used increasingly. Because these systems are battery powered, reducing power consumption is vital. In this report we give the properties of low power design and techniques to exploit them on the architecture of the system. We focus on: min imizing capacitance, avoiding unnecessary and wasteful activity, and reducing voltage and frequency. We review energy reduction techniques in the architecture and design of a hand-held computer and the wireless communication system, including error control, sys tem decomposition, communication and MAC protocols, and low power short range net works

Task allocation in dynamic networks of satellites

The management of distributed satellite systems requires the coordination of a large number of heterogeneous spacecraft. Task allocation in such a system is complicated by limited communication and individual satellite dynamics. Previous work has shown that task allocation using a market-based mechanism can provide scalable and efficient management of static networks; in this paper we extend this work to determine the impact of dynamic topologies. We develop a Keplerian mobility model to describe the topology of the communication network over time. This movement model is then used in simulation to show that the task allocation mechanism does not show a significant decrease in effectiveness from the static case, reflecting the suitability distributed market-based control to the highly dynamic environment

Optimal Content Downloading in Vehicular Networks

We consider a system where users aboard communication-enabled vehicles are interested in downloading different contents from Internet-based servers. This scenario captures many of the infotainment services that vehicular communication is envisioned to enable, including news reporting, navigation maps and software updating, or multimedia file downloading. In this paper, we outline the performance limits of such a vehicular content downloading system by modelling the downloading process as an optimization problem, and maximizing the overall system throughput. Our approach allows us to investigate the impact of different factors, such as the roadside infrastructure deployment, the vehicle-to-vehicle relaying, and the penetration rate of the communication technology, even in presence of large instances of the problem. Results highlight the existence of two operational regimes at different penetration rates and the importance of an efficient, yet 2-hop constrained, vehicle-to-vehicle relaying

Moving Towards Mobile Third Generation Telecommunications Standards: The Good and Bad of the \u27Anytime/Anywhere\u27 Solutions

Mobile communication technologies are changing every aspect of the daily life, bringing new opportunities in many areas. Several converging mobile systems can potentially change organizations significantly by shifting the traditional boundaries of work-life and the workplace. Mobile telephony, combining satellite and terrestrial cellular systems, already transformed the way people work by allowing \u27anytime/anywhere\u27 telephone calling and text messaging. Broadband mobile telephony opens additional avenues to provide information conveniently as quickly and easily as possible, when needed and where needed. The evolution of wireless technologies (from Wireless Personal Area Networks to ubiquitous Third Generation/Universal Mobile Telecommunication System - UMTS) increased the number of services available to business organizations and mobile workers. Machine-to-machine, vertical applications, and mobile office applications are increasingly being deployed. Service providers and mobile operators are also changing the way they operate as a result of the increasing availability of mobile broadband communication services. IT departments need to change their systems, upgrade, and adapt their infrastructure and policies to support these mobile services. These changes are both positive and negative. With this progression, some fundamental questions related to privacy, security, and a new concept of work place and work space are raised. The implications for developing economies, such as China, and their potential for leapfrogging are future attention areas

In-Motes EYE:a real time application for automobiles in wireless sensor networks

Wireless sensor networks have been identified as one of the key technologies for the 21st century. In order to overcome their limitations such as fault tolerance and conservation of energy, we propose a middleware solution, In-Motes. In-Motes stands as a fault tolerant platform for deploying and monitoring applications in real time offers a number of possibilities for the end user giving him in parallel the freedom to experiment with various parameters, in an effort the deployed applications to run in an energy efficient manner inside the network. The proposed scheme is evaluated through the In-Motes EYE application, aiming to test its merits under real time conditions. In-Motes EYE application which is an agent based real time In-Motes application developed for sensing acceleration variations in an environment. The application was tested in a prototype area, road alike, for a period of four months

Cross-layer design of multi-hop wireless networks

MULTI -hop wireless networks are usually defined as a collection of nodes equipped with radio transmitters, which not only have the capability to communicate each other in a multi-hop fashion, but also to route each others’ data packets. The distributed nature of such networks makes them suitable for a variety of applications where there are no assumed reliable central entities, or controllers, and may significantly improve the scalability issues of conventional single-hop wireless networks. This Ph.D. dissertation mainly investigates two aspects of the research issues related to the efficient multi-hop wireless networks design, namely: (a) network protocols and (b) network management, both in cross-layer design paradigms to ensure the notion of service quality, such as quality of service (QoS) in wireless mesh networks (WMNs) for backhaul applications and quality of information (QoI) in wireless sensor networks (WSNs) for sensing tasks. Throughout the presentation of this Ph.D. dissertation, different network settings are used as illustrative examples, however the proposed algorithms, methodologies, protocols, and models are not restricted in the considered networks, but rather have wide applicability. First, this dissertation proposes a cross-layer design framework integrating a distributed proportional-fair scheduler and a QoS routing algorithm, while using WMNs as an illustrative example. The proposed approach has significant performance gain compared with other network protocols. Second, this dissertation proposes a generic admission control methodology for any packet network, wired and wireless, by modeling the network as a black box, and using a generic mathematical 0. Abstract 3 function and Taylor expansion to capture the admission impact. Third, this dissertation further enhances the previous designs by proposing a negotiation process, to bridge the applications’ service quality demands and the resource management, while using WSNs as an illustrative example. This approach allows the negotiation among different service classes and WSN resource allocations to reach the optimal operational status. Finally, the guarantees of the service quality are extended to the environment of multiple, disconnected, mobile subnetworks, where the question of how to maintain communications using dynamically controlled, unmanned data ferries is investigated

Web Based Smart Volvo Bus Passenger Protection against Accident and Tracking Using Android Application

This paper conveys information of providing high range of security for Volvo buses including other heavy vehicles against accidents that may happen due to fire catching and accidents that may happen due to some obstacles. The vehicle will be fitted with the temperature sensor and IR sensor which will be continuously monitoring the temperature and obstacles that may come infront of the bus. In case of any fluctuation, the passengers and the driver are made alert and vehicle will be stopped automatically. The emergency doors and main door will be opened instantly so that the passengers can escape as soon as possible. The location of the vehicle will be tracked and sent to the control room and fire brigade authorities. An added advantage of the paper is the involvement of smart android application which will be updated with these scenarios. In case of any accidents or fire in the bus, the GSM module present in the bus will automatically send a message to the police station, fire station & ambulance for rescue operation along with the location with longitude and latitude values which can be tracked with the help of google map. DOI: 10.17762/ijritcc2321-8169.15053