Abstract
As the growth rate of the internet-of-things (IoT) sensor market is expected to exceed 30%, a technology that can easily collect and processing a large number of various types of sensor data is gradually required. However, conventional multilink IoT sensor communication based on Bluetooth low energy (BLE) enables only the processing of up to 19 peripheral nodes per central device. This study suggested an alternative to increasing the number of IoT sensor nodes while minimizing the addition of a central processor by expanding the number of peripheral nodes that can be processed per central device through a new group-switching algorithm based on Bluetooth low energy (BLE). Furthermore, this involves verifying the relevancy of application to the industry field. This device environment lowered the possibility of data errors and equipment troubles due to communication interference between central processors, which is a critical advantage when applying it to industry. The scalability and various benefits of a group-switching algorithm are expected to help accelerate various services via the application of BLE 5 wireless communication by innovatively improving the constraint of accessing up to 19 nodes per central device in the conventional multilink IoT sensor communication.
Highlights
In the industrial field, wired communication is predominantly used in communication between devices
A Bluetooth low energy (BLE) SoC that supports multi-link, basically consists of 1 central device and peripheral devices, enabling simultaneous connection of devices. With this new Bluetooth 5.3 feature, when there are no changes in the advertisement data, unnecessary processing occurs on the nodes
When the group name setting was completed, it waited for 12 s until the peripheral processors were connected to the BLE central processor, and the nRF52840 module connected with the peripheral processors that were advertising with the same group name
Summary
In the industrial field, wired communication is predominantly used in communication between devices. X standard and BLE multi-link communication can be utilized By this method, it’s possible to configure a wireless network that can control multiple BLE devices simultaneously, but since the mesh topology has capacity restrictions (payload per packet is 11 bytes), a multi-link is required to transmit and receive a lot of data at once. Factory automation and large-scale equipment require many BLE devices and antennas This is a main factor that increases interference between BLE devices [12], causing errors in IoT sensor data and equipment troubles. This study proposes multi-link IoT Sensor Communication based on a new group switching algorithm that can maximize node scalability for one BLE device. This guarantees the scalability of multilink BLE communication through BLE peripheral processors that are grouped with a BLE central processor. The findings of this study will help achieve efficient and economic management and maintenance of automation equipment
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