Abstract

Several algorithms have already been provided for problems of data aggregation in wireless sensor networks, which somehow tried to increase networks lifetimes. In this study, we dealt with this problem using a more efficient method by taking parameters such as the distance between two sensors into account. In this paper, we presented a heuristic algorithm based on distributed learning automata with variable actions set for solving data aggregation problems within stochastic graphs where the weights of edges change with time. To aggregate data, the algorithm, in fact, creates a stochastic minimum spanning tree (SMST) in networks where variable distances of links are considered as edges, and sends data in the form of a single packet to central node after data was processed inside networks. To understand this subject better, we modeled the problem for a stochastic graph having edges with changing weights. Although this assumption that edges weights change with time makes our task difficult, the results of simulations indicate relatively optimal performance of this method.

Highlights

  • Wireless sensor networks consist of a large number of inexpensive sensor nodes distributed densely in the environment, having limited energy and on the other hand, consuming a great deal of energy in order to send information to central node directly

  • We presented a heuristic algorithm based on distributed learning automata with variable actions set for solving data aggregation problems within stochastic graphs where the weights of edges change with time

  • The algorithm, creates a stochastic minimum spanning tree (SMST) in networks where variable distances of links are considered as edges, and sends data in the form of a single packet to central node after data was processed inside networks

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Summary

Full Length Research Paper

A learning automata-based algorithm using stochastic minimum spanning tree for improving life time in wireless sensor networks. We presented a heuristic algorithm based on distributed learning automata with variable actions set for solving data aggregation problems within stochastic graphs where the weights of edges change with time. The algorithm, creates a stochastic minimum spanning tree (SMST) in networks where variable distances of links are considered as edges, and sends data in the form of a single packet to central node after data was processed inside networks. To understand this subject better, we modeled the problem for a stochastic graph having edges with changing weights.

INTRODUCTION
LITERATURE REVIEW
Stochastic minimum spanning tree problem
Learning automata
Distributed learning automata
EXPERIMENTAL RESULTS
The relationship between life time and different network scales
The relationship between life time and distances between nodes
CONCLUSION AND FUTURE WORK
Distances between nodes
Full Text
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