MEC Collaborative Function Retention System Using WebAssembly for Floating-CPS

To promote local production and consumption of Spatio-Temporal Data (STD), we have proposed a Floating Cyber-Physical System (F-CPS) that retains STD and functions (applications) to process and use the STD within a specific area. The F-CPS designed the functions to execute common applications on various types of devices, aiming to accelerate the effective use of STDs. Therefore, the function distributed within the area should be small, and an execution platform for the function does not depend on hardware and operating systems. Furthermore, there is a need for a system to recognize available functions to new users entering the area and deliver them appropriately. In this paper, we propose (1) a compact and portable application execution platform using WebAssembly, and (2) a function Retention System based on the MEC collaborative application delivery method. We evaluate the process of the application execution platform and delivery method in our proposed system using actual equipment. The result of the verification revealed that even when multiple devices retrieve an application simultaneously, the execution of the application could be completed within 2 seconds.