Multiplex communications – Wide area network – Packet switching
Patent
1995-04-25
1996-07-16
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 80, 3701101, 370 681, H04L 1250
Patent
active
055374042
ABSTRACT:
The invention relates to a wide area network implemented on a circuit-switched public data network. Terminals have access to a plurality of data channels and a control channel into the network using a balanced protocol. The invention provides a method for reducing connect time between the terminals over the data channels. To do this a conversation is established between a transaction program on the local terminal and a transaction program on the remote terminal. Responsive to generation of a frame for transmission by the transaction program on the local terminal to the transaction program on the remote terminal, a channel connection between the local terminal and a remote terminal including a data channel connecting each terminal into the wide area network is established if no channel connection already exists. Responsive to expiration of a predetermined period after last transmission or receipt of a frame and existence of the channel connection for a minimum connect period, the channel connection is disestablished without interrupting the conversation between the transaction programs. The predetermined period and the minimum connect period are optimized to minimize costs under a tariff structure for the circuit-switched public data network.
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Bentley Alan M.
Fisher Mark E.
Jongekryg Brian E.
Nelson Randall S.
Dillon Andrew J.
International Business Machines - Corporation
Nguyen Chau T.
Safourek Benedict V.
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