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The Scientific World Journal
Volume 2014, Article ID 381305, 12 pages
Research Article

Congestion Control for a Fair Packet Delivery in WSN: From a Complex System Perspective

Department of Electrical Engineering, Metropolitan Autonomous University (UAM), 09340 Mexico, DF, Mexico

Received 25 April 2014; Accepted 9 July 2014; Published 10 August 2014

Academic Editor: Su Fong Chien

Copyright © 2014 Daniela Aguirre-Guerrero et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this work, we propose that packets travelling across a wireless sensor network (WSN) can be seen as the active agents that make up a complex system, just like a bird flock or a fish school, for instance. From this perspective, the tools and models that have been developed to study this kind of systems have been applied. This is in order to create a distributed congestion control based on a set of simple rules programmed at the nodes of the WSN. Our results show that it is possible to adapt the carried traffic to the network capacity, even under stressing conditions. Also, the network performance shows a smooth degradation when the traffic goes beyond a threshold which is settled by the proposed self-organized control. In contrast, without any control, the network collapses before this threshold. The use of the proposed solution provides an effective strategy to address some of the common problems found in WSN deployment by providing a fair packet delivery. In addition, the network congestion is mitigated using adaptive traffic mechanisms based on a satisfaction parameter assessed by each packet which has impact on the global satisfaction of the traffic carried by the WSN.