Wireless sensor networks (WSNs) is one of the most important technologies in this century. As sensor nodes have limited energy resources, designing energy-efficient routing algorithms for WSNs has become the research focus. And because WSNs routing for maximizing the network lifetime is a NP-hard problem, many researchers try to optimize it with meta-heuristics. However, due to the uncertain va...

Abid Ali Minhas, Thomas Trathnigg, Christian Steger, Reinhold Weiß Technische Universität Graz ,Institut für Technische Informatik, Austria {minhas, steger,rweiss}@iti.tu-graz.ac.at [email protected] _____________________________________________________________ Abstract: Routing algorithms have shown their importance in the power aware wireless micro-sensor networks. In this paper firs...

The paper presents a routing algorithm that maximizes the lifetime of a sensor network in which all data packets are destined to a single collection node. Lifetime is maximized by adjusting the number of packets traversing each node. The adjustment is carried out by transmitting over alternative routes. First part of the paper assumes that the worst case delay resulting from energy efficient ro...

The Clos(m, n) network [1] is a three-stage rearrangeable network capable ofrouting any permutation on N = mn elements. It was proven recently that the three-stage Clos(m, n) network is not self-routing except when the first (and the last) stage contains only two ( ~ x ~)-switches [3]. However, such a network contains O(N2 ) elementary switches which is close to that of a full crossbar network....

Centralizing and using proper transportation facilities cut down costs and traffic. Hub facilities concentrate on flows to cause economic advantage of scale and multimodal transportation helps use the advantage of another transporter. A distinctive feature of this paper is proposing a new mathematical formulation for a three-stage p-hub location routing problem with simultaneous pick-ups and de...

Wireless sensor networks have become increasingly popular due to the variety applications in both military and civilian fields. Routing algorithms are critical for enabling the successful operations of sensor networks. A number of routing algorithms have been proposed. However, all the routing algorithms are considered in isolation from the particular communication needs of the data management....

this paper considers the multi-depot vehicle routing problem with time window in which each vehicle starts from a depot and there is no need to return to its primary depot after serving customers. the mathematical model which is developed by new approach aims to minimizing the transportation cost including the travelled distance, the latest and the earliest arrival time penalties. furthermore, ...

wireless sensor network includes a large number of nodes which are distributed in a geographical location. the essential fact about wsn is that energy of nodes is limited. therefore, presenting proper solutions as an optimized routing is crucial to equally use energy of all nodes. in this paper we propose a method which performs routing in wsns using greedy approach. it is able to choose optimu...