Abstract
With the diversification of industrial Internet of Things applications, there is a growing demand for mobility support in industrial wireless networking environments. However, the routing protocol for low-power and lossy networks is designed based on a static environment and is vulnerable in a mobility environment. Routing protocol for low-power and lossy networks is an Internet engineering task force standard in the low-power and lossy network environments used mainly in industrial environments. In addition, although routing protocol for low-power and lossy networks is based on collection tree protocol and is suitable for data collection and upward traffic transmission, it struggles with downward traffic transmission in terms of control, actuation, and end-to-end transmission. In this article, the problems caused by mobile nodes in routing protocol for low-power and lossy networks are discussed, and a retransmission scheme named IM-RPL is proposed. This retransmission scheme can improve the performance of downward traffic for the mobile nodes by retransmitting the packets to the neighbor nodes, the mobile node’s new parent sets, and relaying them to the mobile node. Its performance is evaluated through an experiment. The results demonstrate that using OpenMote in OpenWSN’s time slotted channel hopping induces a packet reception ratio improvement and a lower transmission delay as compared to standard routing protocol for low power and lossy.
Highlights
Starting with Industry 4.0, many technologies are gaining attention for improving manufacturing plants, such as industrial IoT, Cyber Physical Systems (CPS), and Digital Twin
The root node that has a routing table for the entire topology receives the destination advertisement object (DAO) message and modifies the route. This technique improves the reliability of downward traffic, reduces the delay time, and supports fast path recovery through rapid parent selection in a dynamic environment where mobility exists in RPL
In the RPL, when the mobile nodes (MNs) is outside the transmission range of the parent and cannot receive downward traffic, a new parent is selected through the control message, and packet loss occurs until the routing path is updated
Summary
Starting with Industry 4.0, many technologies are gaining attention for improving manufacturing plants, such as industrial IoT, Cyber Physical Systems (CPS), and Digital Twin These technologies aim to improve productivity and competitiveness through the optimization of processes, reduction of defect rate, and monitoring of a manufacturing environment, by combining information and communication (ICT) technology with manufacturing industry–related fields.[1]. Wireless links have lower power and higher loss characteristics than those considered by MANET.[7] it is difficult to apply MANET routing protocols to LLN To overcome this problem, ROLL proposed RPL, a routing protocol that can operate flexibly in network environments with unreliable connections. RPL is a de facto standard for LLN environments that provides multi-hop connectivity for many battery-powered, embedded, wireless devices for data transmission and communication.[8].
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