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Vehicular Ad hoc Networks (VANETs) have gained considerable attention in recent years because of the extensive applications. However, VANETs are confronted with numerous difficulties and challenges, which lead to communication performance degradation and even data delivery failure. In this paper, we propose a new routing protocol called Intersection-based Delay sensitive Routing using Ant colony optimization...
Multi-Constrained Path (MCP) algorithms are path finding algorithms, unlike conventional routing algorithms, they not only give a path between source and destination, also verifies whether the path satisfies the given constraints (Right turn, Left turn and U turn). MCP algorithms are NPComplete. The MCP algorithms are aimed to find the shortest path in a road network that satisfies the turn prohibitions...
In bus-based delay tolerant networks the duration of a contact between two nodes limits the amount of data that can be transferred. For the implementation of such networks it is important to determine which contact durations can be expected. Moreover, this information can be used by scheduling and routing algorithms to increase efficiency. In this paper we structure and characterize the different...
Rings are quite common in both road traffic networks as well as in telecommunication networks. In the road traffic context, we often find rings surrounding towns and cities. Traffic over these rings is either bidirectional or we may find two rings that surround the town carrying traffic in opposite directions (clockwise and anti-clockwise). Telecommunication networks based on rings have been often...
This paper addresses the Fuzzy Location-Routing problem (FLRP), raised by distribution networks involving depot locations, customer assignment and routing decisions in order to minimizing the total costs. Also this paper develops a simple approach to solve FLRP with traveling times along particular roads being L-R fuzzy numbers. The idea is based on the fuzzy linear programming (FLP) and fuzzy number...
In VANETs, the carry-and-forward strategy had been adopted to overcome uneven distribution of vehicles. If next vehicle located in the transmission range, the vehicle forwards packets; otherwise carries packets until meeting. The carry is almost occurring in sparse traffic road segment, and long carry distance has long end-to-end packet delay. Likewise the dense condition also could have long delay,...
Information system based on intelligent optimization algorithm is provided in this paper to solve the vehicle routing optimization problem with time constraint. And a hybrid optimization algorithm-PBIL combined with Ant algorithm is proposed and applied to VRP. The objective function is to minimize the cost and reduce the loss caused by customerspsila time restriction. The probability matrix of PBIL...
Vehicle routing optimization problem with time constraint is researched in this paper and a hybrid optimization algorithm-PBIL combined with ant algorithm is proposed and applied to VRP. The objective function is to minimize the cost and reduce the loss caused by customerspsila time restriction. The probability matrix of PBIL algorithm is modified with the positive feedback and information disappearing...
Locating rail/road intermodal terminals for freight is decided by the spatial distribution of the multimodal transport network and the shortest path between supply node and demand node. The location problem of rail/ road transfer terminals is formulated by an integer linear programming model. Considering the fuzzy uncertainty in intermodal transport network, the solution to the location model is proposed...
Sensors to monitor cargo are currently operated in standalone mode because of cost considerations, operational simplicity, and because potential benefits to having sensors share information do not appear to have been seriously considered in many cases. To identify situations where threat detection benefits offset networking costs (and where they do not), we describe a numerical algorithm for approximating...
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