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Article

An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks

by 1,†, 2,†, 1,* and 2,*
1
Electronics and Telecommunications Research Institute, Daejon, Korea
2
Department of Electrical and Computer Engineering, University of Ulsan, Ulsan, Korea
*
Authors to whom correspondence should be addressed.
First authors.
Sensors 2019, 19(5), 1236; https://doi.org/10.3390/s19051236
Received: 24 January 2019 / Revised: 4 March 2019 / Accepted: 6 March 2019 / Published: 11 March 2019
In industrial monitoring and control applications, a server often has to send a command to a node or group of nodes in wireless sensor networks. Flooding achieves high reliability of message delivery by allowing nodes to take the redundancy of receiving the identical message multiple times. However, nodes consume much energy due to this redundancy and the long duty cycle. A reliable slotted broadcast protocol (RSBP) tackles this problem by allocating a distinct broadcast slot (BS) to every node using a tree topology. Not only does it remove collision, but it also minimizes energy consumption such that every node remains active only during its parent’s broadcast slot and its own broadcast slot to receive and rebroadcast a message, respectively. However, it suffers from low reliability in harsh environments due to the compete removal of redundancy and low responsiveness to the changes in network topology due to the global scheduling of slots. Our approach allocates one distinct broadcast sharable slot (BSS) to each tree level, thus making a BSS schedule topology-independent. Then, nodes at the same level compete to rebroadcast a message to nodes at one level higher within the BSS, thus allowing the redundancy. In addition, it uses a slot-scheduled transmission within BSS that can further improve reliability by reducing message collisions and also enables the precise management of energy. According to simulations and experiments, the proposed approach can achieve high reliability comparable to flooding and low-energy consumption comparable to RSBP. View Full-Text
Keywords: sharable slot; slotted broadcast; tree; node mobility; energy-efficient sharable slot; slotted broadcast; tree; node mobility; energy-efficient
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MDPI and ACS Style

Yoo, D.-S.; Ta, V.K.; Jang, B.-T.; Oh, H. An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks. Sensors 2019, 19, 1236. https://doi.org/10.3390/s19051236

AMA Style

Yoo D-S, Ta VK, Jang B-T, Oh H. An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks. Sensors. 2019; 19(5):1236. https://doi.org/10.3390/s19051236

Chicago/Turabian Style

Yoo, Dae-Seung, Van K. Ta, Byung-Tae Jang, and Hoon Oh. 2019. "An Energy-Efficient Slotted Sense Multiple Access Broadcast Protocol for Reliable Command Delivery in Dynamic Wireless Sensor Networks" Sensors 19, no. 5: 1236. https://doi.org/10.3390/s19051236

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