US 5,497,370 AGranted

Network system

AssigneeHitachi, Ltd.

InventorsTakuji Hamada, Masakazu Okada, Hiroshi Tomizawa

Life of this patent

Estimating the term…

Loading patent…

Abstract

A network system includes a transmission line including a plurality of transmission channels, a plurality of transmission equipment connected to the transmission line to effect the transmission and reception of information between each other, and a plurality of devices connected to each of the transmission equipment, thereby effecting the transmission of information between the devices connected to the plurality of transmission equipment. Each of the transmission equipment includes a demultiplexing unit for separating an input signal from the transmission line into a plurality of receiving transmission channels, a channel switch unit for receiving the plurality of receiving transmission channels, outputting designated one of the transmission channels to one of the devices connected to the transmission equipment in question, and receiving transmitting information to form an information transmitting channel and combining it with other channels to be passed to form a plurality of sending transmission channels, and a multiplexing unit for receiving the plurality of sending transmission channels from the channel switch unit to multiplex and output the plurality of sending transmission channels.

Claims27

Dependent claims

A network system comprising:

a transmission line including a plurality of transmission channels;
a plurality of transmission equipment connected to said transmission line to transmit and receive information from each other;
and
a plurality of devices connected to each transmission equipment to effect transfer of information between said devices via said plurality of transmission equipment and said transmission line,
each transmission equipment including:
a receiving transmission channel which is fixedly assigned to one of said plurality of transmission channels,
a demultiplexing unit for separating an input signal from said transmission line into a plurality of transmission channels,
at least one channel switch unit for receiving the plurality of transmission channels, outputting information inputted from said receiving transmission channel which is selected from said plurality of separated transmission channels to one of said devices connected to said transmission equipment assigned to receive said selected receiving transmission channel, and receiving transmitting information from said one device to form an information sending channel and combining the same with other information sending channels to form a plurality of sending transmission channels,
means for selecting one of said plurality of transmission channels as the sending transmission channel which is fixedly assigned to the receiving transmission channel of a destination transmission equipment, and
a multiplexing unit for receiving the plurality of sending transmission channels from said channel switch unit and multiplexing said plurality of sending transmission channels to generate an output.

7 more elements

A network system comprising:

a transmission line including a plurality of transmission channels;
and
a plurality of transmission equipment connected to said transmission line to transmit and receive information from each other, wherein one of said plurality of transmission channels is fixedly assigned to each of said transmission equipment as a receiving transmission channel for receiving information from an other transmission equipment by a same transmission channel fixedly assigned as the receiving transmission channel, and
wherein transfer of information between said plurality of transmission equipment is effected such that receiving of information is effected by using one of said plurality of transmission channels fixedly assigned to each transmission equipment as the receiving transmission channel for receiving information from the other transmission equipment by using the same transmission channel, and sending of information is effected by using one of said plurality of transmission channels fixedly assigned to destination transmission equipment as the receiving transmission channel.

1 more element

A network system comprising:

a transmission line including a plurality of transmission channels;
and
a plurality of transmission equipment connected to said transmission line to transmit and receive information from each other, wherein one of said plurality of transmission channels is fixedly assigned to each of said transmission equipment as a receiving transmission channel, and
wherein transfer of information between said plurality of transmission equipment is effected such that receiving of information is effected by using one of said plurality of transmission channels fixedly assigned to each transmission equipment as the receiving transmission channel, and sending of information is effected by using one of said plurality of transmission channels fixedly assigned to destination transmission equipment as the receiving transmission channel;
wherein the transfer of information between said transmission channels in each of said transmission equipment is effected in a manner such that the transmission of information is effected by obtaining transmission right of the receiving transmission channel of the destination transmission equipment.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/197,535Filed 16 Feb 1994 · continuation
Priority: JP 63-28770116 Nov 1988
Granted: 5 Mar 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H04L 12/64
Data switching networks: hybrid switching systems
H04L 12/28
Data switching networks: characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
H04L
Digital communication