QoS and network resources management for communication in distributed manufacturing processes
In this paper, we present a multimedia communication model based on the virtual manufacturing device (VMD) concept that has been defined in the international manufacturing message specification (MMS). This model called the virtual communication support (VCS), makes it possible to cohabit different communication techniques, such as ATM and ethernet, provides a multi-profile solution to introduce real-time multimedia applications and manages network resources. Its specification and design used to perform workstation capabilities to avoid network bottleneck. For these purposes, it defines a service set between the application layer and the other communication layers to manage network resources reservation negotiate the quality of service (QoS) and ensure real-time service execution. The design of this communication model is based on the idea of the specification and description language (SDL) use. It is a formal description technique that enables model validation, extension and reusability. The dynamic behavior of this model is being checked with the message sequence chart (MSC). The implementation and the experimentation of this VCS model are being achieved using the JAVA language. It is being done on the fast-ethernet local area network equipped with multimedia and manufacturing devices. (C) 2002 Elsevier Science B.V. All rights reserved.
qos multimedia vmd sdl java implementation