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Dynamic signal control is complex but important to increase intersection capacity and decrease delays at the same time. A genetic fuzzy logic model for multi-phase signal control at isolated intersections is developed in this study. This model is based on the sufficient fusion of hierarchical genetic algorithms with fuzzy logic, which can ensure the(More)
The throughput and reliability indexes of broadcasting protocol is related to contention windows valve and contending nodes in vehicular ad networks. To find suitable contention window value which can optimize the throughput and reliability of broadcasting protocol, this paper propose theoretical analytic model to analysis the relationship between the(More)
VANETs (vehicular ad hoc networks) are emerging as a new network environment for intelligent transportation systems. Many of the applications built for VANETs will depend on the communications technology that vehicles exchange the information by using wireless LAN without any base stations. So, it is important to provide strict delay guarantees and high(More)
Broadcasting communications is critically important in vehicular ad hoc networks. Many safety applications need safety warning messages to be broadcast to all vehicles present in an area. Design of a broadcasting protocol for vehicular ad hoc networks is an interesting problem because of challenges posed by broadcasting traffic, high throughput, high(More)
— An effective broadcasting protocol should satisfy driver's needs for various transportation information which can enhance the security, comfort and convenience of journey. We propose a discrete markov analytic model for performance evaluation of IEEE 802.11 MAC-broadcasting protocol under saturation condition for vehicular ad hoc networks in highways.(More)
A method about the fractal characterization of nonstationary time series, which is based on measure by dividing the sequence into many segments and not sensitive to embedding dimension, is proposed in this letter. To analyze several experimental data we find that the new method can effectively measure the fractal scale coefficient and detect present of the(More)