A publish-subscribe middleware for real-time wireless sensor networks

Authors:
Mohsen Sharifi;Majid Alkaee Taleghan;Amirhosein Taherkordi
Affiliations:
Computer Engineering Department, Iran University of Science and Technology;Computer Engineering Department, Iran University of Science and Technology;Computer Engineering Department, Iran University of Science and Technology
Venue:
ICCS'06 Proceedings of the 6th international conference on Computational Science - Volume Part I
Year:
2006

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Abstract

The specific characteristics of Wireless Sensor Networks (WSNs) have changed Quality of Service (QoS) support in these networks to a challenging task. In this paper, we propose a dispatcher as part of a message routing component in publish/subscribe WSNs. Some works consider link-based solutions to support real-time parameters in WSNs. These works do not take into account the dynamic behavior of WSNs with probable damaged nodes and links. The use of dispatcher can reduce the average message delay, whether the message has high priority or low priority. The dispatcher uses a scheduler to support real-time parameters, such as delay, and selects messages from two separate queues, namely, QoS queue and non-QoS queue. Simulation results show that our approach really reduces the average delay and increases the delivery rate for both QoS messages and non-QoS messages.