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Energies 2017, 10(9), 1339; doi:10.3390/en10091339

Determining the Optimal Configuration of the Multi-Ring Tree for Bluetooth Multi-Hop Networks

1
The Department of Electronics Engineering, Chung Hua University, Hsinchu 30012, Taiwan
2
The Department of Electrical Engineering, Chung Hua University, Hsinchu 30012, Taiwan
*
Author to whom correspondence should be addressed.
Received: 20 August 2017 / Revised: 30 August 2017 / Accepted: 31 August 2017 / Published: 5 September 2017
(This article belongs to the Special Issue Control and Communication in Distributed Generation Systems)
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Abstract

In this work, a multi-ring tree algorithm is proposed for Bluetooth low-energy networks with non-uniform distribution of devices. In a dense area, a leader root is elected during the leader election phase and a min-path algorithm is introduced to determine the optimal number of rings for various numbers of discoverable roots. According to the optimal configuration, the leader root connects to its one-hop neighboring roots to form the first-tier ring; each new root connects with one downstream root, and these roots connect together to form the second-tier ring until the desired outermost ring is reached. In sparse areas, each root constructs its own spanning tree subnet, finally creating a multi-ring tree scatternet. To achieve the least route discovery overhead, a multi-hop self-routing protocol is developed to efficiently deliver packets. Computer simulations show that the optimal multi-ring subnet can be determined; the optimal multi-ring tree outperforms conventional dual ring-tree (DRT) and Bluetooth hybrid ring-tree (BlueHRT) in terms of network performance. View Full-Text
Keywords: Bluetooth networks; scatternet formation; topology configuration; routing protocol Bluetooth networks; scatternet formation; topology configuration; routing protocol
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Yu, C.-M.; Hsu, T.-W. Determining the Optimal Configuration of the Multi-Ring Tree for Bluetooth Multi-Hop Networks. Energies 2017, 10, 1339.

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