Patent US6366377B1 successfully refreshed from Google Patents.
US6366377B1
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Optical network and switch control method for use in the optical network
Assignee: NEC Corp
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Filing: 1998-04-27
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Granted: 2002-04-02
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Expires: 2018-04-27
Abstract
Abstract In a method of controlling a switching operation of an optical network for use in connection between an optical transmitter and an optical receiver through an optical switch is controlled by a switch controller, the optical receiver is given through the optical switch a sequence of combined optical signals which is formed by combining a sequence of optical signals with an additional sequence of optical signals. The additional sequence of the optical signals may be either a sequence of optical signals sent to another optical receiver or a sequence of dummy optical signals. The combined optical signal sequence has a time interval which is defined between two adjacent ones of the combined optical signals and which is shorter than a predetermined time interval of, for example, 1 millisecond. Such a combined optical signal sequence serves to avoid occurrence of an optical surge appearing when the time interval is longer than the predetermined time interval.
Inventors
- 👤 Akio Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:06
CPC Classifications
H; H04; H04J; H04J14/00; H04J14/02; H04J14/0227; H04J14/0228; H04J14/0221; H04J14/02216; H04J14/0238; H04Q; H04Q11/00; H04Q11/0001; H04Q11/0005; H04Q11/0062; H04Q2011/0007; H04Q2011/0013; H04Q2011/0015; H04Q2011/0037; H04Q2011/0047; H04Q2011/0064; H04Q2011/0079; H04Q2011/0081
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A method of controlling a switching operation of an optical network comprising: a plurality of optical transmitters; a plurality of optical receivers, each said receiver having an optical preamplifier; an optical switch being between said optical transmitters and said optical receivers; and a switch controller controlling the optical switch, said method comprising the steps of: transmitting an input signal to each of said optical receivers at a time interval shorter than a predetermined time interval, said time interval being controlled by said switch controller; choosing said time interval whereby no optical surge takes place at a posterior optical input signal.
Claim 2
Independent Claim
100 words
A method of controlling a switching operation of an optical network comprising: a plurality of optical transmitters; a plurality of optical receivers, each said receiver having an optical preamplifier; an optical switch being between said optical transmitters and said optical receivers; and a switch controller controlling the optical switch, said method comprising the steps of: transmitting an input signal to each of said optical receivers at a time interval shorter than a predetermined time interval, said time interval being controlled by said switch controller; choosing said time interval whereby no optical surge takes place at a posterior optical input signal.
Claim 3
Independent Claim
107 words
A method of controlling a switching operation of an optical network comprising: a plurality of optical transmitters; a plurality of optical receivers, each said receiver having an EDFA (erbium doped fiber amplifier) as an optical preamplifier; an optical switch being between said optical transmitters and said optical receivers; and a switch controller controlling the optical switch, said method comprising the steps of: transmitting an input signal to each of said optical receivers at a time interval shorter than a predetermined time interval, said time interval being controlled by said switch controller; choosing said time interval whereby no optical surge takes place at a posterior optical input signal.
Claim 4
Independent Claim
107 words
A method of controlling a switching operation of an optical network comprising: a plurality of optical transmitters; a plurality of optical receivers, each said receiver having an EDFA (erbium doped fiber amplifier) as an optical preamplifier; an optical switch being between said optical transmitters and said optical receivers; and a switch controller controlling the optical switch, said method comprising the steps of: transmitting an input signal to each of said optical receivers at a time interval shorter than a predetermined time interval, said time interval being controlled by said switch controller; choosing said time interval whereby no optical surge takes place at a posterior optical input signal.
Claim 5
Dependent Claim
20 words
The method of claim 1 , wherein the step of transmitting further comprises a time interval shorter than one millisecond.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2005-04-01 | 2005-10-01 | 2006-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-01 | 2009-10-01 | 2010-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-01 | 2013-10-01 | 2014-04-02 | $7700.00 | Window Closed / Lapsed |