US5218604A
Expired / Lapsed
US
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Dual-hubbed arrangement to provide a protected ring interconnection
Assignee: Nytell Software LLC
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Filing: 1990-08-31
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Granted: 1993-06-08
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Expires: 2010-08-31
Abstract
Abstract An arrangement of coupled hybrid rings is disclosed which can withstand a failed node or a cut ring in either or both of the hybrid rings, as well as an outage of one of the two serving nodes utilized to interconnect the hybrid rings. The pair of serving nodes are interposed in each of the hybrid rings and serve to transmit signals between the two rings to satisfy the hybrid ring requirement of having equivalent signals propagating in two opposing directions on the unidirectional rings composing an individual hybrid ring.
Inventors
- 👤 Joseph Sosnosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:24
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/437
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
180 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the first unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the second unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring.
Claim 2
Dependent Claim
180 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the first unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the second unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring.
Claim 3
Dependent Claim
182 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring, said second autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the the second unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the the first unidirectional path of the first hybrid ring.
Claim 4
Dependent Claim
182 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring, said second autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the the second unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the the first unidirectional path of the first hybrid ring.
Claim 5
Dependent Claim
334 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, with the first and second unidirectional paths propagating first and second multiplexed subrate channels, respectively, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the second unidirectional path of the first hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the first unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the second unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the first unidirectional path of the first hybrid ring, said second autonomous serving node including a third drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for generating subrate channels from either the first or second multiplexed subrate channels and for communicating said generated subrate channels to only the second unidirectional path of the second hybrid ring; and a fourth drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for producing subrate channels from either the first or second multiplexed subrate channels and for communicating said produced subrate channels to only the first unidirectional path of the first hybrid ring.
Claim 6
Dependent Claim
334 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes first and second unidirectional paths, with the first and second unidirectional paths propagating first and second multiplexed subrate channels, respectively, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the first unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the second unidirectional path of the first hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the first unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the second unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the second unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the first unidirectional path of the first hybrid ring, said second autonomous serving node including a third drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for generating subrate channels from either the first or second multiplexed subrate channels and for communicating said generated subrate channels to only the second unidirectional path of the second hybrid ring; and a fourth drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for producing subrate channels from either the first or second multiplexed subrate channels and for communicating said produced subrate channels to only the first unidirectional path of the first hybrid ring.
Claim 7
Dependent Claim
182 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the CW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the CCW unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring.
Claim 8
Dependent Claim
182 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the CW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the CCW unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring.
Claim 9
Dependent Claim
184 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring, said second autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the the CCW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the the CW unidirectional path of the first hybrid ring.
Claim 10
Dependent Claim
184 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring, said second autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the the CCW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the the CW unidirectional path of the first hybrid ring.
Claim 11
Dependent Claim
335 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, with the CW and CCW unidirectional paths propagating first and second multiplexed subrate channels, respectively, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the CCW unidirectional path of the first hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the CW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the CCW unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the CW unidirectional path of the first hybrid ring, said second autonomous serving node including a third drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for generating subrate channels from either the first or second multiplexed subrate channels and for communicating said generated subrate channels to only the CCW unidirectional path of the second hybrid ring; and a fourth drop-multiplexer coupled to the unidirectional paths of the second hybrid for producing subrate channels from either the first or second multiplexed subrate channels and for communicating said produced subrate channels to only the CW unidirectional path of the first hybrid ring.
Claim 12
Dependent Claim
335 words
Circuitry for interconnecting a first hybrid ring network to a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths, with the CW and CCW unidirectional paths propagating first and second multiplexed subrate channels, respectively, the circuitry comprising a first autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CW unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the CCW unidirectional path of the first hybrid ring, said first autonomous serving node including a first drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for selecting subrate channels from either the first or second multiplexed subrate channels and for communicating said selected subrate channels to only the CW unidirectional path of the second hybrid ring; and a second drop-multiplexer coupled to the unidirectional paths of the second hybrid ring for choosing subrate channels from either the first or second multiplexed subrate channels and for communicating said chosen subrate channels to only the CCW unidirectional path of the first hybrid ring, and a second autonomous serving node, coupled to the hybrid rings, for coupling the unidirectional paths of the first hybrid ring to the CCW unidirectional path of the second hybrid ring and for coupling the unidirectional paths of the second hybrid ring to the CW unidirectional path of the first hybrid ring, said second autonomous serving node including a third drop-multiplexer coupled to the unidirectional paths of the first hybrid ring for generating subrate channels from either the first or second multiplexed subrate channels and for communicating said generated subrate channels to only the CCW unidirectional path of the second hybrid ring; and a fourth drop-multiplexer coupled to the unidirectional paths of the second hybrid for producing subrate channels from either the first or second multiplexed subrate channels and for communicating said produced subrate channels to only the CW unidirectional path of the first hybrid ring.
Claim 13
Independent Claim
153 words
A method for transmitting multiplexed signals between a first hybrid ring network and a second hybrid ring network wherein each ring includes first and second unidirectional paths propagating first and second multiplexed signals, respectively, the method comprising the steps of drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the first unidirectional path of the second hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the second unidirectional path of the first hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the second unidirectional path of the second hybrid ring, and drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the first unidirectional path of the first hybrid ring.
Claim 14
Independent Claim
153 words
A method for transmitting multiplexed signals between a first hybrid ring network and a second hybrid ring network wherein each ring includes first and second unidirectional paths propagating first and second multiplexed signals, respectively, the method comprising the steps of drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the first unidirectional path of the second hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the second unidirectional path of the first hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the second unidirectional path of the second hybrid ring, and drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the first unidirectional path of the first hybrid ring.
Claim 15
Independent Claim
155 words
A method for transmitting multiplexed signals between a first hybrid ring network and a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths propagating first and second multiplexed signals, respectively, the method comprising the steps of drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the CW unidirectional path of the second hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the CCW unidirectional path of the first hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the CCW unidirectional path of the second hybrid ring, and drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the CW unidirectional path of the first hybrid ring.
Claim 16
Independent Claim
155 words
A method for transmitting multiplexed signals between a first hybrid ring network and a second hybrid ring network wherein each ring includes clockwise (CW) and counterclockwise (CCW) unidirectional paths propagating first and second multiplexed signals, respectively, the method comprising the steps of drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the CW unidirectional path of the second hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the CCW unidirectional path of the first hybrid ring, drop multiplexing a selected one of the first or second multiplexed signals of the first hybrid ring to only the CCW unidirectional path of the second hybrid ring, and drop multiplexing a selected one of the first or second multiplexed signals of the second hybrid ring to only the CW unidirectional path of the first hybrid ring.
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| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |