Patent US5325222A successfully refreshed from Google Patents.
US5325222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photonic concentrator
Assignee: Alcatel CIT SA
•
Filing: 1992-01-28
•
Granted: 1994-06-28
•
Expires: 2012-01-28
Abstract
Abstract A photonic concentrator is used to connect to a telecommunication network subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, in particular on an optical fiber. The concentrator comprises, for processing cells from a subscriber terminal, a time-division and non-synchronous statistical spectral multiplexing stage, a synchronization to a local clock stage, a spectral multiplexing and bit rate converter stage, and a periodic time-division multiplexing stage. To process cells addressed to subscriber terminals it comprises a periodic time-division demultiplexing, spectral multiplexing and bit rate adjuster stage, a bit rate converter stage and a spectral demultiplexing stage. The concentrator has applications in telecommunication networks.
Inventors
- 👤 Jean-Baptiste Jacob
- 👤 Guy Le Roy
- 👤 Jean-Michel Gabriagues
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:52
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/0001; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04Q11/0062; H04Q11/0066; H04L2012/5603; H04L2012/5604; H04L2012/5605; H04L2012/5609; H04L2012/561
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock by delaying each cell of said first means output, with a variable delay.
Claim 2
Dependent Claim
82 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock by delaying each cell of said first means output, with a variable delay.
Claim 3
Dependent Claim
109 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock, wherein to process cells from subscriber terminals said concentrator further comprises: third means for spectrally multiplexing the resynchronized cells and for multiplying their bit rate; and fourth means for time-division multiplexing, without spectral multiplexing, cells output by the third means.
Claim 4
Dependent Claim
109 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock, wherein to process cells from subscriber terminals said concentrator further comprises: third means for spectrally multiplexing the resynchronized cells and for multiplying their bit rate; and fourth means for time-division multiplexing, without spectral multiplexing, cells output by the third means.
Claim 5
Dependent Claim
135 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock; third means for time-division demultiplexing and spectrally multiplexing cells addressed to subscriber terminals, to provide a third means output; fourth means receiving the output of said third means and dividing the bit rate of the time-division demultiplexed and spectrally multiplexed cells of said third means output; and fifth means receiving the output of said fourth means and spectrally demultiplexing cells whose bit rate has been divided.
Claim 6
Dependent Claim
135 words
A photonic concentrator for connecting, to a telecommunication network, subscriber terminals sending and receiving data in the form of fixed length cells using asynchronous time-division multiplexing, said concentrator comprising: first means for time-division multiplexing and spectral multiplexing cells from subscriber terminals to provide a first means output; and second means receiving the output from said first means and resynchronizing cells of said first means output to a local clock; third means for time-division demultiplexing and spectrally multiplexing cells addressed to subscriber terminals, to provide a third means output; fourth means receiving the output of said third means and dividing the bit rate of the time-division demultiplexed and spectrally multiplexed cells of said third means output; and fifth means receiving the output of said fourth means and spectrally demultiplexing cells whose bit rate has been divided.
Claim 7
Dependent Claim
27 words
A photonic concentrator according to claim 3, wherein said third means operate periodically on cells supplied to said concentrator in a sorted order by said telecommunication network.
References Cited (Backward Citations)
JPS6161596A
Cited
EP0197263A2
Cited
EP0282071A2
Cited
JPS6451834A
Cited
EP0351729A2
Cited
GB2224620A
Cited
US5105292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |