Abstract
In this paper, a Reconfigurable Mesh-Ring (RMR) algorithm is proposed for Bluetooth sensor networks. The algorithm is designed in three stages to determine the optimal configuration of the mesh-ring network. Firstly, a designated root advertises and discovers its neighboring nodes. Secondly, a scatternet criterion is built to compute the minimum number of piconets and distributes the connection information for piconet and scatternet. Finally, a peak-search method is designed to determine the optimal mesh-ring configuration for various sizes of networks. To maximize the network capacity, the research problem is formulated by determining the best connectivity of available mesh links. During the formation and maintenance phases, three possible configurations (including piconet, scatternet, and hybrid) are examined to determine the optimal placement of mesh links. The peak-search method is a systematic approach, and is implemented by three functional blocks: the topology formation block generates the mesh-ring topology, the routing efficiency block computes the routing performance, and the optimum decision block introduces a decision-making criterion to determine the optimum number of mesh links. Simulation results demonstrate that the optimal mesh-ring configuration can be determined and that the scatternet case achieves better overall performance than the other two configurations. The RMR topology also outperforms the conventional ring-based and cluster-based mesh methods in terms of throughput performance for Bluetooth configurable networks.
Highlights
Bluetooth is currently one of the most promising available ad hoc wireless technologies [1,2,3,4], and the introduction of its advantageous features is considered to be one of the main enablers of the Internet of Things (IoT) [5,6,7,8,9,10]
In order to utilize the advantages of mesh-subnet and ring-subnet, this paper proposes a ring-based subnet with mesh interconnection, called the Reconfigurable Mesh-Ring (RMR), to construct a scatternet
A RMR topology is proposed for Bluetooth multi-hop networks
Summary
Bluetooth is currently one of the most promising available ad hoc wireless technologies [1,2,3,4], and the introduction of its advantageous features is considered to be one of the main enablers of the Internet of Things (IoT) [5,6,7,8,9,10]. BLE data applications are increasingly emerging in daily life, such as in health networks [12], industry automation [13], wireless sensor networks [14], etc. These applications pose some important research challenges, such as how to connect BLE devices in order to share information between users, and how to form the desired network configurations for various types of applications. The relay node design increases the possibility of implementing the scatternet formation algorithm and multi-hop routing for BLE devices
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