Systems, apparatus, and methods for segment routing of optical signals
AssigneeInfinera Corporation
InventorsMadhukar Anand, Sanjoy Bardhan, Ramesh Subrahmaniam, Soumya Roy
Life of this patent
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Abstract
A packet optical network may include a packet optical gateway node that is configured to advertise a segment label to other nodes in the network where the segment label is used by a source node in place of a conventional segment routing label when the source node generates the list of labels included in the header of a data packet while establishing a path through a network. The segment label differs from a conventional segment routing label in that the segment label indicates the L0/L1 device or path as opposed to the L2/L3 device indicated by a conventional segment routing label.
Claims9
A method comprising:
- a first gateway node announcing the first gateway node to a packet optical network;
- a second gateway node announcing the second gateway node to the packet optical network;
- the first gateway node transmitting a first segment label to a path computation engine, the first segment label configured to identify the second gateway node in an optical domain of the packet optical network;
- updating a forwarding table of the first gateway node with the first segment label;
- transmitting the first segment label to a first packet node;
- and
- appending, by the first packet node, the first segment label and a second segment label to a packet, the second segment label configured to identify the first gateway node in a packet domain of the packet optical network,
- wherein the first gateway node announces the first gateway node to the packet optical network using an announcement packet that includes a packet optical gateway flag,
- wherein the announcement packet includes a transport domain type of the first gateway node and an optical domain identification of the first gateway node,
- wherein the Border Gateway protocol link state extension or the PCE protocol link state extension includes information about an OTN mapping of a first optical link between the first gateway node and the second gateway node, a timeslot for the first optical link, and an optical protection scheme for the first optical link.
A non-transitory computer-readable medium comprising instructions that, when executed by a processor, cause the processor to:
- announce a first gateway node to a packet optical network;
- announce a second gateway node to the packet optical network;
- transmit a first segment label to a path computation engine, the first segment label configured to identify the second gateway node in an optical domain of the packet optical network;
- update a forwarding table of the first gateway node with the first segment label;
- transmit the first segment label to a first packet node;
- and
- append the first segment label and a second segment label to a packet, the second segment label configured to identify the first gateway node in a packet domain of the packet optical network,
- wherein the first segment label is transmitted to the path computation engine using a Border Gateway protocol link state extension or PCE protocol link state extension,
- wherein the Border Gateway protocol link state extension or the PCE protocol link state extension includes information about an OTN mapping of a first optical link between the first gateway node and the second gateway node, a timeslot for the first optical link, and an optical protection scheme for the first optical link.
Dependencies are inferred from the claim text.