EP0122007A1
Expired / Lapsed
EP
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Loop transmission system
Assignee: Kawasaki Heavy Industries Ltd
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Filing: 1984-03-02
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Granted: —
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Expires: 2004-03-02
Abstract
Abstract A loop transmission system used, for example, for management and control of a train service includes duplicated loop transmission lines (1, 2) for redundancy. Corresponding line portions of the two loop transmission lines (1, 2) respectively on both sides of pairs of transmission units (11 a, 13a; 12a, 14a) which are associated with a control unit (4a) are connected to each other by connection lines (15,16) via two pairs of compensation transmission units (15m, 15n; 16m, 16n) at both ends of the connection lines. When a failure occurs on any one of the two loop transmission lines, the connection lines (15, 16) serve to form an alternative path for transmitting information without substantially increasing the length of transmission path and without causing transmission delay.
Inventors
- 👤 Takeshi Ishida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 10:58
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74; H04B1/745; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/437
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
263 words
A loop transmission system comprising: duplicated first and second loop transmission lines (1, 2); first and second pairs of transmission units (lla, 13a; llb, 13b; --- llg, 13g; and 12a, 14a; 12b, 14b; --- 12g, 14g), said first pair of transmission units (lla, 13a; --- llg, 13g) being connected to said first loop transmission line (I), said second pair of transmission units (12a, 14a; --- 12g, 14g) being connected to said second loop transmission line (2), transmission directions of said first and second loop transmission lines (1, 2) being opposite or the same with each other; a control unit (4a, 4b, --- 4f) and a central processing unit (3) connected to said first and second pairs of transmission units (lla, 13a; --- llg, 13g and 12a, 14a; --- 12g, 14g); first and second pairs of compensation transmission units (15m, 15n and 16m, 16n), said first pair of compensation transmission units (15m, 15n) being connected to corresponding line portions of said first and second loop transmission lines (1, 2) on one side of said first and second pairs of transmission units (lla, 13a and llg, 13g), said second pair of compensation transmission units (16m, 16n) being respectively connected to corresponding line portions of said first and second loop transmission lines (1, 2) on the other side of said second pairs of transmission units (lla, 13a; 12a, 14a); and connecting lines (15, 16) respectively connected between said first and second pairs of compensation transmission units (15m, 15n and 16m, 16n) thereby to connect said first and second loop transmission lines (1, 2) with each other.
Claim 2
Dependent Claim
263 words
A loop transmission system comprising: duplicated first and second loop transmission lines (1, 2); first and second pairs of transmission units (lla, 13a; llb, 13b; --- llg, 13g; and 12a, 14a; 12b, 14b; --- 12g, 14g), said first pair of transmission units (lla, 13a; --- llg, 13g) being connected to said first loop transmission line (I), said second pair of transmission units (12a, 14a; --- 12g, 14g) being connected to said second loop transmission line (2), transmission directions of said first and second loop transmission lines (1, 2) being opposite or the same with each other; a control unit (4a, 4b, --- 4f) and a central processing unit (3) connected to said first and second pairs of transmission units (lla, 13a; --- llg, 13g and 12a, 14a; --- 12g, 14g); first and second pairs of compensation transmission units (15m, 15n and 16m, 16n), said first pair of compensation transmission units (15m, 15n) being connected to corresponding line portions of said first and second loop transmission lines (1, 2) on one side of said first and second pairs of transmission units (lla, 13a and llg, 13g), said second pair of compensation transmission units (16m, 16n) being respectively connected to corresponding line portions of said first and second loop transmission lines (1, 2) on the other side of said second pairs of transmission units (lla, 13a; 12a, 14a); and connecting lines (15, 16) respectively connected between said first and second pairs of compensation transmission units (15m, 15n and 16m, 16n) thereby to connect said first and second loop transmission lines (1, 2) with each other.
Claim 3
Dependent Claim
52 words
A loop transmission system according to Claim 1, further comprising respectively on said first and second loop transmission lines (1, 2) third and fourth pairs of compensation transmission units (17m, 18m; 17n, 18n) for coupling or crosscoupling said first and second loop transmission lines (1, 2) by connection lines (17, 18) respectively.
References Cited (Backward Citations)
FR2465374A1
Cited
GB2067056A
Cited
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