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- W2460923216 abstract "Index Terms— Vehicular ad hoc networks, delay tolerant networks, routing protocol, performance modeling. Abstract— Vehicular networking is an emerging technology to support applications involving communications between ve- hicles, between vehicles and fixed access points, and between vehicles and the Internet cloud. The goal is to enable vehicles to exchange information for improved safety through situational awareness, enhanced convenience, and achieve increased levels of efficiency in time and energy consumption. Safety messaging, real-time traffic updates, remote diagnostics, Internet access and in-car entertainment are examples of applications targeted by this technology. This dissertation considers communica- tion and networking among vehicles that are constrained to navigable roadways. We propose a novel routing technique that incorporates attributed (labeled) messaging; geographic routing; and delay tolerant networking techniques in a solution that operates in a network characterized by rapid mobility and time-varying partitioning (fragmentation). An analytical model is developed to demonstrate the performance of opportunistic data exchange in a delay tolerant network setting. Contributions of the work include revelation of phase transition behavior due to vehicle density and transmission range. We are able to identify regimes of density where gains are achieved by exploiting the opportunistic contacts between vehicles traveling in opposing directions. Also significant is the observation that increased mobility of nodes from 0 m/s to 10 m/s yields an order of magnitude increase in the performance of messaging from 0 m/s to 200 m/s. The proposed architecture is compared with existing mobile ad hoc networking schemes and performance gains achieved are detailed. It is demonstrated that in a hybrid environment with intermittently placed access points, large sep- arations are possible when supported by multihop networking. Under delay tolerant networking assumption, minimum delay and maximum propagation rates are achieved for low vehicular traffic densities of 20 vehicles/km, for given parameters. A path based messaging scheme would achieve similar performance at 40 vehicles/km." @default.
- W2460923216 created "2016-07-22" @default.
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- W2460923216 date "2010-01-01" @default.
- W2460923216 modified "2023-09-24" @default.
- W2460923216 title "IV 2010 PhD Forum: Analytical Modeling of Delay-Tolerant Data Dissemination in Vehicular Networks" @default.
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