RFID Enabled Vehicular Network for Ubiquitous Travel Query

RFID Enabled Vehicular Network for Ubiquitous Travel Query

Tianle Zhang (Beijing University of Posts and Telecommunications, China), Chunlu Wang (Beijing University of Posts and Telecommunications, China), ZongWei Luo (The University of Hong Kong, China), Shuihua Han (Xianmen University, China) and Mengyuan Dong (Xianmen University, China)
DOI: 10.4018/jssoe.2011070104
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Abstract

Fixed infrastructure based wireless network is very expensive to provide total coverage and offer ubiquitous communication capacity. RFID enabled Vehicular Network emerges as an alternative which can leverage mobile nodes to bridge the gap between information isolated islands. The mobility and low duty cycle activity of nodes may destroy the network connectivity. This paper proposes RFID Enabled Vehicular Network for Ubiquitous Travel Query over Mobile Relay Network (MRN) to facilitate the needed information access for drivers on the road. The ubiquitous service is introduced and the performance of the successful information query is evaluated based on the computing model and network simulation. The results of evaluation and the real experiences of this service validate the feasibility of the system.
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Most of the communication protocols always assume that the network is fully connected. The protocol design and its evaluation research also focuses on this kind of networks. The application for this type of networks has not yet witnessed mass market deployment. The ongoing research and users demand is mainly focused on implementing real-time applications where high bandwidth and open access to the public Internet. However, there are many realistic scenarios in which many areas are with no preexisting communication infrastructure (e.g., disaster recovery and rural environments) (Bruno et al., 2005). In a transportation system the vulnerability of the communication links of ITS is inevitable. Trade-off should be dealt with between high responsiveness and the flexibility of the network.

If certain delay is tolerant, partially connected routing protocol can achieve successful packet forwarding in non-fully connected network (Burgess et al., 2006). In DTN (Delay-Tolerant Network) architecture, routing protocol can use store-wait-forward process to provide communication even if the end-to-end fully connected path never exists between the source the destination.

In ITS, the communication link is highly dynamic and unstable. Due to the high mobility and low duty cycle of communication link, the delay could vary. This kind of network is named Vehicular Sensor Network (VSN), which is a type of VANET (Burgess et al., 2006). For some applications which are not delay sensitive, such as traffic information query, environmental monitoring and event reporting, certain delay is tolerable, because late massage is much better than no message. The goal of such a network is to increase the probability of finding a path through an intermittently connected network. Traditional protocols resist on immediate forwarding policy and may fail due to the unpredictable delay. In the routing of VSN such as proposed in paper (Zhao & Cao, 2008), messages can be buffered for a certain amount of delay for later forwarding and be routed to the destination in tolerant delay.

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