Architecture and method for framing optical control and data bursts within optical transport unit structures in photonic burst-switched networks
First Claim
1. A system comprising:
- an optical channel transport unit (OTU) framer to frame information of an optical burst including an optical burst format into an OTU frame, the OTU frame including an overhead portion, a payload portion and a error correction portion, wherein the overhead portion includes a first field to indicate whether the OTU frame was encoded with error correction coding and a second field to indicate a type of data carried in the error correction portion when the first field indicates that the OTU frame was encoded without error correction coding, wherein the second field further indicates whether the type of data carried in the error correction portion is different from a type of data carried in the payload portion when the OTU frame is encoded without error correction coding; and
an optical interface to transmit the OTU frame to a node of an optical network, the node comprising an optical switch.
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Accused Products
Abstract
An optical network, which includes edge and switching nodes, optically communicate information formatted into bursts that are included in one or more optical channel transport unit (OTU) frames that are based on ITU-T recommendation G.709. The overhead portion of the OTU frame can include all of the fields defined in the G.709 standard, except that the two reserved bits are used to define an OTU frame type. When the FEC function is not used, the OTU frame can be arbitrarily partitioned to carry optical burst information. The information can be either control and/or data bursts or metadata related to the optical network and/or optical burst flow. When the FEC function is used, the OTU frame is used to include optical control or data bursts or optical metadata in the payload portion of the G.709 OTU frame.
126 Citations
56 Claims
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1. A system comprising:
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an optical channel transport unit (OTU) framer to frame information of an optical burst including an optical burst format into an OTU frame, the OTU frame including an overhead portion, a payload portion and a error correction portion, wherein the overhead portion includes a first field to indicate whether the OTU frame was encoded with error correction coding and a second field to indicate a type of data carried in the error correction portion when the first field indicates that the OTU frame was encoded without error correction coding, wherein the second field further indicates whether the type of data carried in the error correction portion is different from a type of data carried in the payload portion when the OTU frame is encoded without error correction coding; and an optical interface to transmit the OTU frame to a node of an optical network, the node comprising an optical switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 52, 55)
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18. A method comprising:
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framing information to be transmitted over an optical network into an optical burst according to an optical burst format; framing information of the optical burst into an optical channel transport unit (OTU) frame including an OTU frame format, the OTU frame format comprising an overhead portion, a payload portion and an error correction portion, wherein the overhead portion includes a first field to indicate whether the OTU frame was encoded with error correction coding and a second field to indicate a type of data carried in the error correction portion when the first field indicates that the OTU frame was encoded without error correction coding, wherein the second field further indicates whether the type of data carried in the error correction portion is different from a type of data carried in the payload portion when the OTU frame is encoded without error correction coding; and transmitting the OTU frame to a node of the optical network, the node comprising an optical switch. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 53, 56)
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35. A system, comprising:
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a plurality of optically interconnected switching nodes each including an optical switch; and an edge node, comprising; an optical burst framer to frame information received from a first network into an optical burst according to an optical burst format; an optical channel transport unit (OTU) framer to frame information of the optical burst into an OTU frame according to a preselected OTU format, the OTU frame including an overhead portion, a payload portion and a error correction portion, wherein the overhead portion includes a first field to indicate whether the OTU frame was encoded with error correction coding and a second field to indicate a type of data carried in the error correction portion when the first field indicates that the OTU frame was encoded without error correction coding, wherein the second field further indicates whether the type of data carried in the error correction portion is different from a type of data carried in the payload portion when the OTU frame is encoded without error correction coding; and an optical interface to transmit the OTU frame to a switching node of the plurality of switching nodes. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 54)
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Specification