Reliability Analysis of M2M Cyclic Data Transfer based on ad-hoc Wireless P2P Link

Computer communication in modern factories can be considered complex due to its heterogeneity, various demands of timing, large datasets and countless timeseries, as well as needs for context oriented data handling. The paths, content and time requirements of the data flow may vary due to the flexibility of production, current settings, location on the shop floor, and the temporary nature of some Machine-To-Machine dialogues. Sometimes, because of mutable but indispensable interoperability of various subsystems, the application relationships between nodes must be established as transient, on-demand only, and without wired infrastructure. In this case, ad-hoc wireless networks are required, and awareness of radio link reliability is essential due to inevitable disturbances and general real-time and dependability requirements. Against this background, an analysis of a temporary and short distance wireless channel between two nodes is presented in the paper. It was carried out briefly theoretically and thoroughly empirically based on delay measurement on the link layer of IEEE802.15.4, Bluetooth 5, and WiFi 4. The results allow to determine the scope of applicability of this type of pseudo-deterministic low level connection and depict the guidelines for communication design.