Panichpapiboon, Sooksan

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Panichpapiboon, Sooksan
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sooksan.pa@kmitl.ac.th

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    Item type:Publication,
    Irresponsible forwarding under real intervehicle spacing distributions
    (2013-01-01)
    Panichpapiboon, Sooksan
    ;
    Cheng, Lin
    One approach to the distribution of traffic information in a self-organizing traffic information system is multihop broadcasting. In this approach, each vehicle may simply rebroadcast an information packet that it receives from the others. However, rebroadcasting results in redundant retransmissions of the same information, leading to a useless occupation of the radio channel. Minimizing redundancy, while still guaranteeing reachability in the network, is a challenging task in multihop broadcasting. In our previous work, we introduced a new probabilistic-based broadcasting scheme, i.e., Irresponsible Forwarding (IF) , which could effectively reduce the redundancy. However, in the previous work, we only considered the scenario where the intervehicle spacing was exponentially distributed. In this paper, we generalize the concept of IF such that it can be applied to any intervehicle spacing distribution. In addition, we evaluate the performance of the IF protocol when it is applied in a realistic scenario (i.e., using real traffic traces). This paper shows that the IF protocol is able to limit packet redundancy all hours of the day effectively. © 1967-2012 IEEE.
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    Item type:Publication,
    Effects of intervehicle spacing distributions on connectivity of VANET: A case study from measured highway traffic
    (2012-10-11)
    Cheng, Lin
    ;
    Panichpapiboon, Sooksan
    Connectivity is an important property for information dissemination in a vehicular ad hoc network. Basically, connectivity ensures that a message from a source can be spread to reach all the vehicles in the network. Over the past few years, there have been a significant number of studies on connectivity models for vehicular ad hoc networks. Most of them rely on the key assumption that the intervehicle spacing distribution is exponential. However, based on a new empirical analysis, it is shown that during most periods of the day the intervehicle spacing distribution can better be described by other statistical distributions. This certainly affects the connectivity analysis. In this article, we discuss how the connectivity of a vehicular ad hoc network in a highway traffic scenario will change when the intervehicle spacing distribution is not exponential. © 1979-2012 IEEE.