Information communication networks are being developed which provide a variety of services integrating information processing and communications. A high realtime processing capability and high reliability are required in switching and other nodes making up such networks. Multi-user processing and large-scale data processing functions are also required, especially in information processing nodes. In addition, as the network develops, in order to realize a diversity of services reliably and efficiently it should be possible to incorporate similar functions in a number of nodes, and to change the distribution of functions among nodes. Software portability across nodes is thus an important factor. This paper will outline the design principles and configuration of CTRON, which is a set of operating system interfaces designed to meet these requirements in information communication networks.
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