US4672373A
Expired / Lapsed
US
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Communication network system
Assignee: Hitachi Ltd
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Filing: 1984-12-19
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Granted: 1987-06-09
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Expires: 2004-12-19
Abstract
Abstract Transmission line groups consisting of a plurality of loop-like transmission routes are mutually connected via transmission controllers, and are arranged on a two-dimensional or three-dimensional space. Therefore, processing units are connected as a homogeneous network in the matrix or mesh form by means of the loop-like transmission routes. The transmission controllers corresponding to the nodes of the network have a communication management function such that they send the data without grasping the situation on the transmission routes, independently check the trouble between the adjacent transmission controllers and specify the position of trouble. A communication network system such as a high local area network (LAN) or the like can be realized.
Inventors
- 👤 Kinji Mori
- 👤 Shoji Miyamoto
- 👤 Hirokazu Ihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/46; H04L12/4637
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
129 words
A communication network system comprising: at least a first transmission loop line; a plurality of second transmission lines each crossing said first transmission line at at least two positions; a plurality of transmission controllers, each connected to said first transmission loop line and to a transmission line of said plurality of second transmission lines at the position of said crossing of said each second transmission line of said first transmission line; each of said transmission controllers containing means for sending a loop check message to a transmission line connected thereto, and for receiving said message through another transmission line connected thereto, and means to detect an abnormally of the loop composed of said transmission line and another transmission line connected thereto, by the response to said loop check message.
Claim 2
Dependent Claim
129 words
A communication network system comprising: at least a first transmission loop line; a plurality of second transmission lines each crossing said first transmission line at at least two positions; a plurality of transmission controllers, each connected to said first transmission loop line and to a transmission line of said plurality of second transmission lines at the position of said crossing of said each second transmission line of said first transmission line; each of said transmission controllers containing means for sending a loop check message to a transmission line connected thereto, and for receiving said message through another transmission line connected thereto, and means to detect an abnormally of the loop composed of said transmission line and another transmission line connected thereto, by the response to said loop check message.
Claim 3
Dependent Claim
23 words
A communication network system in accordance with claim 1 wherein: each of said second plurality of transmission lines are configured as loop lines.
Claim 4
Dependent Claim
49 words
A communication network system according to claims 1 or 2 further comprising: at least one third transmission line crossing said at least first transmission loop line at at least two crossing positions, and each of said transmission controllers is further connected to said at least one third transmission line.
Claim 5
Dependent Claim
22 words
A communication network system according to claim 2 wherein each of said first or second transmission lines are configured as loop lines.
Claim 6
Dependent Claim
35 words
A communication network system according to claim 1 wherein each of said transmission controllers has means, when said abnormality is detected, for transmitting messages to lines besides the loop in which said abnormality is detected.
Claim 7
Dependent Claim
46 words
A communication network system according to claim 1 wherein each of said transmission controllers has means, when said abnormality is detected, of sending repeatedly said loop check message to said loop where said abnormality is detected to detect if said loop has recovered from the abnormality.
Claim 8
Dependent Claim
34 words
A communication network system according to claim 1 wherein each of said transmission controllers has means for sending at least one loop check message to another loop when said loop check message is received.
Claim 9
Dependent Claim
90 words
A communication network system comprising: at least a first transmission loop line; a plurality of second transmission lines each crossing said first transmission line at at least two positions; a plurality of transmission controllers, each connected to said first transmission loop line and a transmission line of said plurality of second transmission lines at the position of said crossings which are arranged in a shape of encompassing the surface of a solid; and wherein each of said transmission controllers contains means for independently initiating checking for abnormalities in the network.
Claim 10
Dependent Claim
90 words
A communication network system comprising: at least a first transmission loop line; a plurality of second transmission lines each crossing said first transmission line at at least two positions; a plurality of transmission controllers, each connected to said first transmission loop line and a transmission line of said plurality of second transmission lines at the position of said crossings which are arranged in a shape of encompassing the surface of a solid; and wherein each of said transmission controllers contains means for independently initiating checking for abnormalities in the network.
Claim 11
Dependent Claim
78 words
The communication network system as defined in claim 8 wherein each of said transmission controllers includes means for sending a small loop check message to a small loop consisting of a plurality of said transmission controllers adjacent thereto and to routes connected to the plurality of said transmission controllers adjacent thereto, and means for detecting the absence of an abnormality of said small loop from said small loop check message having made a round through said small loop.
Claim 12
Dependent Claim
42 words
The communication network system as defined in claim 8 wherein each of said transmission controllers includes means for sending a small loop check message along said small loop to the sending source of said message upon receiving said small loop check message.
Claim 13
Dependent Claim
36 words
The communication network system as defined in claim 8 wherein each of said transmission controllers includes means for sending only said small loop check message along said loop-like route of said sending source of said message.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |