Optical crossconnect apparatus and optical transmission system
First Claim
Patent Images
1. An optical crossconnect apparatus having one terminal connected to a transmission path from one optical transmission terminal station and an other terminal connected to a transmission path from another optical transmission terminal station, and capable of switching said transmission paths when an optical signal is transmitted between the one optical transmission terminal station and the other optical transmission terminal station, comprising:
- a first optical signal switching means having “
M1 (M1 being an integer larger than, or equal to
2)”
number of ports and “
N1 (N1 being an integer larger than, or equal to
1)”
number of ports, through which optical signals in a predetermined range of wavelength can pass;
a second optical signal switching means having “
M2 (M2 being larger than, or equal to
2)”
number of ports and “
N2 (N2 being an integer larger than, or equal to
1)”
number of ports, through which the optical signals in a predetermined range of wavelength can pass; and
“
L (L being an integer larger than, or equal to
1)”
number of optical signal repeaters, one end of which is connected to the “
N1”
number of ports of said first optical signal switching means, and the other end of which is connected to the “
N2”
number of ports of said second optical switching means, wherein said “
N1”
number of ports and said “
N2”
number of ports are larger than said “
L”
number of the optical signal repeaters, and wherein said “
M1”
number of ports of said first optical signal switching means connected to said one terminal, and said “
M2”
number of ports of said second optical signal switching means connected to said the other terminal are larger than, or equal to 2.
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Abstract
An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters. The “M1” ports of the first optical signal switch connected to the one terminal, and the “M2” ports of the second optical signal switch connected to the other terminal are larger than, or equal to 2.
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Citations
8 Claims
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1. An optical crossconnect apparatus having one terminal connected to a transmission path from one optical transmission terminal station and an other terminal connected to a transmission path from another optical transmission terminal station, and capable of switching said transmission paths when an optical signal is transmitted between the one optical transmission terminal station and the other optical transmission terminal station, comprising:
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a first optical signal switching means having “
M1 (M1 being an integer larger than, or equal to
2)”
number of ports and “
N1 (N1 being an integer larger than, or equal to
1)”
number of ports, through which optical signals in a predetermined range of wavelength can pass;
a second optical signal switching means having “
M2 (M2 being larger than, or equal to
2)”
number of ports and “
N2 (N2 being an integer larger than, or equal to
1)”
number of ports, through which the optical signals in a predetermined range of wavelength can pass; and
“
L (L being an integer larger than, or equal to
1)”
number of optical signal repeaters, one end of which is connected to the “
N1”
number of ports of said first optical signal switching means, and the other end of which is connected to the “
N2”
number of ports of said second optical switching means,wherein said “
N1”
number of ports and said “
N2”
number of ports are larger than said “
L”
number of the optical signal repeaters, andwherein said “
M1”
number of ports of said first optical signal switching means connected to said one terminal, and said “
M2”
number of ports of said second optical signal switching means connected to said the other terminal are larger than, or equal to 2.
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2. An optical crossconnect apparatus having one terminal connected to a transmission path from one optical transmission terminal station and an other terminal connected to a transmission path from another optical transmission terminal station, and capable of switching said transmission paths when an optical signal is transmitted between the one optical transmission terminal station to the other optical transmission terminal station, comprising:
-
a first optical signal switching means having “
M1 (M1 being an integer larger than, or equal to
1)”
number of ports and “
N1 (N1 being an integer larger than, or equal to 2,)”
number of ports, through which optical signals in a predetermined range of wavelength can pass;
a second optical signal switching means having “
M2 (M2 being larger than, or equal to
1)”
number of ports and “
N2 (N2 being an integer larger than, or equal to
2)”
number of ports, through which the optical signals in a predetermined range of wavelength can pass; and
“
L (L being an integer larger than, or equal to
1)”
number of optical signal repeating means, one end of which is connected to the “
N1”
number of ports of said first optical signal switching means, and the other end of which is connected to the “
N2”
number of ports of said second optical switching means,wherein said “
N1”
number of ports and said “
N2”
number of ports are larger than said “
L”
number of optical signal repeaters, andwherein said “
M1”
number of ports of said first optical signal switching means connected to said one terminal, and said “
M2”
number of ports of said second optical signal switching means connected to said the other terminal are larger than, or equal to 1.
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3. An optical crossconnect apparatus having one terminal connected to a transmission path from one optical transmission terminal station and an other terminal connected to a transmission path from another optical transmission terminal station, and capable of switching said transmission paths when an optical signal is transmitted between the one optical transmission terminal station and the other optical transmission terminal station, comprising:
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a first optical signal switching means having “
M (M being an integer larger than, or equal to
1)”
number of ports and “
2×
M”
number of ports, through which optical signals in a predetermined range of wavelength can pass;
“
L (L being an integer larger than, or equal to
1)”
number of optical signal repeaters; and
a second optical signal switching means having “
N1 (N1 being larger than, or equal to 2L+M)”
number of ports and also “
N2 (N2 being larger than, or equal to
1)”
number of ports,wherein M number of ports among the (2×
M) ports of said first optical signal switching means, and (2×
L) number of ports of said L number of optical signal repeaters are connected to the N1 number of ports of said second optical switching means.- View Dependent Claims (4, 5, 6, 7, 8)
wherein each of said optical switch means includes two ports connected to said one terminal of the optical crossconnect apparatus, and one port connected to any of the N1 number of ports and the N2 number of ports of said second optical signal switching means.
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5. An optical crossconnect apparatus as claimed in claim 3 wherein said first optical signal switching means includes a mechanical optical switch, and
wherein each of said mechanical optical switch two ports connected to said one terminal of the optical crossconnect apparatus, and one port connected to any of the N1 number of ports and the N2 number of ports of said second optical signal switching means. -
6. An optical crossconnect apparatus as claimed in claim 3 wherein said optical signal repeater is an optical fiber amplifier.
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7. An optical crossconnect apparatus as claimed in claim 3 wherein said optical signal repeater is a semiconductor optical amplifier.
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8. An optical crossconnect apparatus as claimed in claim 3 wherein said optical signal repeater is a regenerator.
Specification
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Current AssigneeHitachi, Ltd.
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Original AssigneeHitachi, Ltd.
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InventorsHayashi, Yukio, Fukashiro, Yasuyuki, Takatori, Masahiro, Kanetake, Tatsuo, Hanatani, Shoichi, Sano, Hirohisa, Kitajima, Shigeki
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Primary Examiner(s)NEGASH, KINFE MICHAEL
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Application NumberUS09/106,903Time in Patent Office1,365 DaysField of Search359/117, 359/128, 359/176, 359/110, 385/17US Class Current398/82CPC Class CodesH04B 10/032 using working and protectio...H04Q 11/0001 using optical switchingH04Q 11/0005 Switch and router aspectsH04Q 11/0062 Network aspectsH04Q 2011/0024 using space switchingH04Q 2011/0043 Fault toleranceH04Q 2011/0058 Crossbar; MatrixH04Q 2011/0081 Fault tolerance; Redundanc...
