Multiplex communications – Wide area network – Packet switching
Patent
1990-01-30
1993-06-29
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 858, 370 851, 370 941, 34082508, 371 33, H04J 302
Patent
active
052240959
ABSTRACT:
A network control system for use in a communication network controls the receipt and transmission of messages between at least a pair of nodes of the network. Messages conveyed within the network include short messages having a length less than a predetermined number of bytes and long messages having a length greater than the predetermined number of bytes. The network control system is located at least at one of the nodes and includes a connectionless network control portion for controlling the transmission and receipt of the short messages and a connection-oriented network control portion coupled to the connectionless network control portion for establishing a connection with the other node for controlling the transmission and receipt of the long messages between the pair of nodes. The connectionless portion of the system includes a transport stage which provides end-to-end reliability within the system, a network stage for establishing routing of the messages, and a data link stage for providing point-to-point reliability and other control functions such as message flow control, node resynchronization, and node suspension. The connection-oriented portion of the system includes a session stage for handling the communication of long messages greater then the predetermined number of bytes in length.
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Rasmussen David E.
Stark James K.
Woest Karen L.
Johnson Service Company
Olms Douglas W.
Ton Dang
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