Industry 4.0 introduces new use cases, with more and more mobile devices appearing in the industrial landscape. These applications require both new technologies and smooth integration into existing brownfield deployments. Emerging mobile use cases can be divided into optional mobile and mandatory mobile, where the first point considers the use of wireless communications due to soft criteria such as cost savings and the second means use cases that cannot be covered by wireline technologies due to their movement, such as AGVs. For most industrial applications, high determinism, E2E latency and synchronicity are most important. Therefore, we provide a common table, based on these requirements, listing both existing and emerging mobile use cases. Since time synchronization is particularly demanding for wireless use cases, we propose a concept for a simple but precise synchronization in IEEE 802.11 WLAN and a suitable integration using TSN in combination with OPC UA technology as examples. Furthermore, the concept is evaluated with the help of a testbed utilizing state-of-the-art hardware. This means that this concept can be directly applied in existing industry solutions. It can be shown that the concept is already suitable for a wide range of the mandatory mobile applications.
翻译:工业4.0 引入了新的使用案例,工业景观中出现了越来越多的移动设备。这些应用需要新技术和平稳地融入现有的棕色地带部署。新出现的移动使用案例可以分为选择性移动和强制移动,其中第一点考虑使用无线通信,因为节省成本等软标准,而第二点则考虑使用无线通信,因为如AGVs等电线技术因其移动而无法覆盖。对于大多数工业应用、高度确定性、E2E弹性和同步性最为重要。因此,我们根据这些要求提供一个共同的表格,列出现有和新出现的移动使用案例。由于时间同步对于无线使用案例的要求特别高,我们提出了一个概念,在IEEE 802.11 WLAN中简单而精确地同步,并结合OPC UA技术进行适当的整合。此外,在评估这一概念时,利用最先进的硬件进行测试,这意味着这一概念可以直接适用于现有的工业解决方案。可以表明,由于时间同步性概念已经适合于广泛的强制性移动应用。