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VTIS: A Volunteered Travelers Information System *
"... VTIS is a dynamic notification system that takes in a user’s route and calculates the time-delay imposed by disruptions to the normal traversal. The disruptions are calculated by using crowdsourced notifications. This is accomplished by the creation of a client side application for notification disp ..."
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VTIS is a dynamic notification system that takes in a user’s route and calculates the time-delay imposed by disruptions to the normal traversal. The disruptions are calculated by using crowdsourced notifications. This is accomplished by the creation of a client side application for notification display and a server infrastructure that will process and store the event information. We have devised a system that will generate personalized notifications for users based on a provided path, temporal range, and set of transportation modes. At a high level, the functionality of this system is to identify events that affect the user’s route and notify the user of these events. The VTIS will provide a multimodal no-tification system based on information mined from Twitter data and volunteered information from VTIS users. This in-formation will be stored to create a repository of transporta-tion events., This repository will be queried to notify affected users of events that may affect their route.. Although this outlined problem has been solved previously, our approach is novel in several ways: (1)accounting for multiple modes, (2)combining user input with mined data, and the (3)mod-eling method used to calculate effects on the user’s route. Some of these methods have been implemented separately; however, a comprehensive system has not been constructed that includes all of these items.
Abstract — In Vehicular Ad Hoc Networks (VANET),
"... trust establishment among communicating vehicles is important to be built to secure messages ' exchange and reliability. In this paper, the proposed scheme presents a categorized decentralized trust management evaluation scheme for nodes in vehicular ad hoc environments. Each node is evaluated ..."
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trust establishment among communicating vehicles is important to be built to secure messages ' exchange and reliability. In this paper, the proposed scheme presents a categorized decentralized trust management evaluation scheme for nodes in vehicular ad hoc environments. Each node is evaluated individually according to its interactions during event reporting. Based on this evaluation, a node is assigned a category level (according to its trust value) and a confidence measure, which determine the degree of trustworthiness of nodes ' generated reports during broadcasting. The scheme integrates role-based trust with experience-based trust, to form a combined trust model, taking into account the history of the driver’s interactions. Case studies and evaluation of the protocol, showed early malicious node detection, which leads to an efficient reporting scheme. Vehicular ad-hoc networks are ephemeral networks [2], where connections between nodes are short lived. The density of the network changes continuously, e.g. higher during rush hours and lower at night time. Since nodes keep moving in and out of communication range, most probably two communicating nodes may not communicate in the future. Therefore, node evaluation should be performed in a decentralized way. Powerful processing devices and secure storage medium are installed in vehicles to allow complex calculations for VANET applications to take place. Keywords- advisory network, efficient reporting system, malicious node detection, message verification and broadcast, penalty system, trust management in VANET. I.
