Abstract
Wireless sensor networks (WSNs) play a key role in the ecosystem of the Industrial Internet of Things (IIoT) and the definition of today’s Industry 4.0. These WSNs have the ability to sensor large amounts of data, thanks to their easy scalability. WSNs allow the deployment of a large number of self-configuring nodes and the ability to automatically reorganize in case of any change in the topology. This huge sensorization capacity, together with its interoperability with IP-based networks, allows the systems of Industry 4.0 to be equipped with a powerful tool with which to digitalize a huge amount of variables in the different industrial processes. The IEEE 802.15.4e standard, together with the access mechanism to the Time Slotted Channel Hopping medium (TSCH) and the dynamic Routing Protocol for Low-Power and Lossy Networks (RPL), allow deployment of networks with the high levels of robustness and reliability necessary in industrial scenarios. However, these configurations have some disadvantages in the deployment and synchronization phases of the networks, since the time it takes to synchronize the nodes is penalized compared to other solutions in which access to the medium is done randomly and without channel hopping. This article proposes an analytical model to characterize the behavior of this type of network, based on TSCH and RPL during the phases of deployment along with synchronization and connection to the RPL network. Through this model, validated by simulation and real tests, it is possible to parameterize different configurations of a WSN network based on TSCH and RPL.
Highlights
The concept of Industry 4.0 has revolutionized industry as we know it today, adding new degrees of digitalization to plant processes and providing greater knowledge of the different phases of the value chain
To carry out the validation of the proposed analytical model, both for the Time Slotted Channel Hopping medium (TSCH) model and for the RPL model, different simulations were carried out. In these simulations the number of neighbors that already belong to the network and the transmission period of the signaling messages, were modified
It has different applications that are useful in the operation of TSCH-based wireless sensor networks (WSNs), such as the autonomous scheduling mechanism Orchestra, which is used in these simulations
Summary
The concept of Industry 4.0 has revolutionized industry as we know it today, adding new degrees of digitalization to plant processes and providing greater knowledge of the different phases of the value chain. The relationship between the TSCH medium access mechanism and the RPL protocol has not been studied as deeply as TSCH synchronization, but their relationship is important, since they are part of the complete process of deploying a new node An analytical model both for TSCH and RPL has been proposed in this article, allowing the characterization of the total time that a node takes to connect to a network based on TSCH andn RPL.
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