A computer network model using concurrent process synchronization.
Randy Richard Boldosser · 1982
In an integrated circuit manufacturing environment there are many phases of production that require the aid of q~ --· _ ... .. _c_?._mp~~(~~.;.:~ P.;:.f~.~~--~an!. .:!.f the_ .. ma~~fac·~-~~-~ng pro_ce_~.~~----~~.~coordinate these phases, computers must be networked to provide information between production processes. This thesis discusses one network that conne~ts several manufacturing processes controlled by minicomputers and a larger computer used for monitoring production flow. Given an environment where interruption of ·file transmission is very likely, the network must be designed to include adequate handshaking and error checking to accommodate accurate transmissions. Conflicting with this requirement is the necessity to transmit large amounts of information in sho·rt time periods. This thesis describes a network that transmits· 100,000 bits of information per second. The network is designed so that users accessing the network have the capability of real-time file transmission. Since the operating systems used within the network can handle code for the concurrent execution of subtasks. within processes, deadlocks are prevented by emulating device timeouts. By using this feature, one subtask can be Copyright 1982 by Western Electric Company, Inc.