Station arrangement in data transmission network
First Claim
1. A station arrangement including a plurality of terminal controllers each connected with a user unit, and a central controller connected through an intra-system bus with said terminal controllers and also connected to an inter-system bus, for implementing data transmission through said inter-system bus with one or more other stations connected commonly on said inter-system bus;
- each of said terminal controllers comprising;
(a) means for forming data sent from said user unit into a data packet;
(b) first transmission means for transmitting said data packet onto said intra-system bus in accordance with network protocol conformable to the procedure for layer 3 or layer 4 of the seven layers of the Open Systems Interconnection (OSI) model (IS
7498) stated by the International Organization for Standardization (ISO);
(c) means for receiving a data packet sent over said intra-system bus from another station, in accordance with the network protocol;
(d) means for reforming the data packet received by said reception means to have a format suitable for said user unit; and
(e) second transmission means for transmitting the reformed data to said user unit;
said central controller comprising;
(f) bus access means for transmitting the data packet from said first transmission means onto said inter-system bus by a procedure conformable to layer 1 and layer 2 of the seven layers of the OSI model and(g) means for taking in a data packet destined to the self station from said inter-system bus and sending the data packet onto said intra-system bus.
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Abstract
A station arrangement for implementing data transmission between stations linked through a transmission line comprises a central controller having a transmission line access function and a data packet relay function, and a plurality of terminal controllers connected through a system bus to the central controller, with a terminal unit connected to each terminal controller. Each terminal controller has a network protocol function besides the terminal control function.
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Citations
5 Claims
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1. A station arrangement including a plurality of terminal controllers each connected with a user unit, and a central controller connected through an intra-system bus with said terminal controllers and also connected to an inter-system bus, for implementing data transmission through said inter-system bus with one or more other stations connected commonly on said inter-system bus;
- each of said terminal controllers comprising;
(a) means for forming data sent from said user unit into a data packet; (b) first transmission means for transmitting said data packet onto said intra-system bus in accordance with network protocol conformable to the procedure for layer 3 or layer 4 of the seven layers of the Open Systems Interconnection (OSI) model (IS
7498) stated by the International Organization for Standardization (ISO);(c) means for receiving a data packet sent over said intra-system bus from another station, in accordance with the network protocol; (d) means for reforming the data packet received by said reception means to have a format suitable for said user unit; and (e) second transmission means for transmitting the reformed data to said user unit;
said central controller comprising;(f) bus access means for transmitting the data packet from said first transmission means onto said inter-system bus by a procedure conformable to layer 1 and layer 2 of the seven layers of the OSI model and (g) means for taking in a data packet destined to the self station from said inter-system bus and sending the data packet onto said intra-system bus. - View Dependent Claims (2, 3, 4, 5)
- each of said terminal controllers comprising;
Specification