Backward-recursive path computation using RSVP-TE
Granted: March 20, 2018
Patent Number:
9923805
One or more nodes, in a network, are configured to transmit a message, for computing diverse paths through the network from a first domain to a second domain using a Resource Reservation Protocol-Traffic Engineering (RSVP-TE) signaling protocol; generate at least one data structure that identifies multiple diverse entry points to the second domain; transmit the at least one data structure toward the first domain; complete the at least one data structure to form at least one completed…
Stacked cage optical module heat relay system
Granted: March 6, 2018
Patent Number:
9910231
An apparatus comprising a cage for pluggable optical modules including a bay having a first port stacked with a second port, the bay having an opening between the first and second port; a heat collector module in the opening comprising a first contact plate adjacent to the first port bottom and provided in the first port and configured to contact a first optical module in the first port, a second contact plate adjacent to the second port top and provided in the second port and configured…
System and method for determining nonlinear mitigation perturbative distortion coefficients using a received optical signal
Granted: February 27, 2018
Patent Number:
9906309
A processor circuit is provided in a coherent optical receiver module. The processor receives a series of electrical signals over a time period, representative of a series of optical signals received at instants of time within the time period. Each of the electrical signals is indicative of a respective one of a plurality of points on an IQ plane, each of the points being spaced from one of a plurality of predetermined points in the IQ plane by a corresponding one of a plurality of…
Periodic superchannel carrier arrangement for optical communication systems
Granted: February 20, 2018
Patent Number:
9900124
Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, is processed and then output to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data, forming a plurality of corresponding carriers. The plurality of wavelengths used for the plurality of carriers are spectrally spaced apart by a common, periodic fixed spacing. The plurality of…
Multiplexer and modulation arrangements for multi-carrier optical modems
Granted: February 20, 2018
Patent Number:
9900104
Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and converted to an analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The carriers are modulated according to one of a plurality of modulation formats and then optically…
Systems and methods for multilayer peering
Granted: January 30, 2018
Patent Number:
9883264
A software defined network, in accordance with some examples of the disclosure, may be used to optimizing traffic across a multi-layer inter-exchange for applications like automated private peering by incorporating packet switching along with OTN and/or optical switching into a converged system. Participants in private peering may have ports into the multi-layer inter-exchange, some to the L2 fabric which supports multi-tenant peering and some to the L1 or L0 fabric for…
Configurable telecommunication equipment chassis
Granted: January 23, 2018
Patent Number:
9877414
The disclosure describes methods and apparatuses that are used to provide a telecommunication equipment chassis for supporting telecommunication equipment within server racks while providing an adjustable venting arrangement for the telecommunication equipment. More particularly, the disclosure describes a telecommunication equipment chassis for supporting telecommunication equipment within a server rack, which is vertically adjustable, rather than horizontally adjustable, to modify the…
Hybrid optical transmitter and/or receiver structure
Granted: January 23, 2018
Patent Number:
9876575
A device may include a substrate. The device may include a carrier mounted to the substrate. The device may include a transmitter photonic integrated circuit (PIC) mounted on the carrier. The transmitter PIC may include a plurality of lasers that generate an optical signal when a voltage or current is applied to one of the plurality of lasers. The device may include a first microelectromechanical structure (MEMS) mounted to the substrate. The first MEMS may include a first set of lenses.…
Optical module blind mating heat relay system
Granted: January 23, 2018
Patent Number:
9874708
An optical module blind mating heat relay system, comprising a linecard comprising a circuit board; a heat relay apparatus comprising a first heat pipe on the circuit board, a radiator attached to the circuit board and in thermal contact with the first heat pipe; a heat relay receiver assembly comprising a receiver housing having a slot and a contact slug connected to the receiver housing and in thermal contact with the first heat pipe; a pluggable optical module removably engaged with…
Dynamic activation of pre-deployed network resources
Granted: January 9, 2018
Patent Number:
9866493
A network device may receive an activation instruction. The network device may provide network resources. The activation instruction may request the network device to activate a particular network resource that is deactivated. The activation instruction may be associated with a license that identifies the particular network resource and identifies a resource request of a user. The network device may configure, based on the activation instruction, a component of the network device to…
Systems and methods for coupling a fiber to a polarization sensitive photonic integrated circuit
Granted: December 26, 2017
Patent Number:
9854336
The integrated network element offers an efficient fiber-chip coupling of multiple outputs of a polarization sensitive photonic integrated circuit (PIC) using a programmable mirror co-packaged with the PIC. Efficient fiber-chip coupling requires precise and active alignment of all free-space components. These constraints can be reduced by using a programmable mirror in the form of a liquid crystal on silicon (LCoS) device. The LCoS can be programmed with patterns that offer highly…
Wavelength collision detection in carrier multiplexers
Granted: December 26, 2017
Patent Number:
9853726
This disclosure relates to optical line system equipment, which enables wavelength addition for long haul transmission. The system is configured to prevent contention of wavelengths added into a multiplexer. For example, an optical wavelength combiner, such as a multiplexer, may include components that are configured to detect potential collisions between existing wavelengths and a newly added wavelength, and block the addition of the conflicting wavelength while alerting the operator.
Misconnection avoidance on networks
Granted: November 28, 2017
Patent Number:
9832107
A switch node provided with a switch, an input interface and an output interface. The input interface is adapted to couple to a first communication link to receive a first TDM frame having a user payload field containing a first user data from the first communication link, and a frame overhead field containing a first identification. The input interface is configured to validate the first identification in the frame overhead field and reject the first TDM frame responsive to the first…
Optical bandwidth manager
Granted: November 28, 2017
Patent Number:
9831952
A system may receive user input that identifies network entities in an optical network. The system may provide a user interface that displays a representation of the network entities and of optical link types configured to carry optical signals among the network entities. The system may receive user input that identifies a particular optical link type, and may display a representation of optical links, of the particular optical link type, that are associated with the network entities.…
Methods and systems for recovery in coherent optical networks
Granted: November 28, 2017
Patent Number:
9831942
A method for receiving, by circuitry of an optical node adapted for wavelength multiplexing and wavelength switching, over an OSC an optical signal comprising overhead information indicative of status of at least one of an optical layer in an OTN; terminating the optical signal; notifying software of the status of the optical layer; detecting, based on the status of the optical layer, a uni-directional or bi-directional failure of a working path between the optical node and a second…
Cooling device installation using a retainer assembly
Granted: November 14, 2017
Patent Number:
9818670
A system includes a retainer assembly to align each of a group of cooling devices with a corresponding electrical component of a group of electrical components that are mounted to a circuit board, where the retainer assembly includes a group of apertures, such that each of the cooling devices protrudes through a corresponding aperture when the retainer assembly is installed on the circuit board, and where the retainer assembly includes a group of retaining springs, each of which is…
Systems, methods, and apparatus for ARP mediation
Granted: November 7, 2017
Patent Number:
9813358
An exemplary network controller may be configured to perform ARP mediation through passively learning MAC addresses on client sides and keeping track of IP/MAC/Attachment point associations, hijacking ARP requests received by the core nodes through a packet_in operation or a redirection to other agents, injecting proxy ARP replies that provide target MAC information without the actual target being involved, and possibly programming the network nodes with the static ARP responding rule…
Scaling apparatus and method for compensating nonlinearity due to the finite output impedance of current sources in current-steering digital-to-analog converters
Granted: November 7, 2017
Patent Number:
9813071
A scaling apparatus and method for compensating nonlinearity due to the finite output impedance of current sources in current-steering digital-to-analog converters (DACs) are disclosed herein. In an example, a DAC may receive a digital input signal. The DAC may determine an output current weight for each of a plurality of unit cells, based on an output impedance of the unit cell. Further, the DAC may generate an analog output signal by applying the plurality of output current weights to…
Wavelength selective switch (WSS) for shaping optical signals
Granted: October 31, 2017
Patent Number:
9806842
A device may perform a set of sample measurements of a set of slices of spectrum utilized by an input optical signal. The device may perform an analysis of the input optical signal to determine an attenuation profile. The analysis may include identifying a channel in a particular slice of spectrum, of the set of slices of spectrum, based on an optical power of a sample measurement, of the set of sample measurements, satisfying a threshold. The device may apply the attenuation profile to…
Fast protection path activation using control plane messages
Granted: October 24, 2017
Patent Number:
9800495
A method, performed in a network that includes a group of nodes, includes identifying a path through a set of the nodes, where each node, in the set of nodes, has a data plane and a control plane; establishing a control plane tunnel, associated with the path, within the control plane of the nodes in the set of nodes; establishing a data plane tunnel, associated with the path, within the data plane of the nodes in the set of nodes, where the data plane tunnel is associated with the…
