Patent application number | Description | Published |
20080273877 | System and Method for Managing Communication in a Hybrid Passive Optical Network - In accordance with the teachings of the present invention, a system and method for managing communication in a hybrid passive optical network (HPON) is provided. In a particular embodiment, the method includes transmitting, at a first wavelength, a first configuration message on the HPON. The method also includes receiving at one or more of a plurality of receivers at an optical line terminal (OLT) one or more configuration response messages from one or more optical network units (ONUs) in a first set of ONUs. The method further includes, based on the configuration response messages from the first set of ONUs, associating, in a database, each ONU in the first set of ONUs with the first wavelength and with the receiver receiving the configuration response message from the ONU. The method also includes, after transmitting the first configuration message, transmitting, at a second wavelength, a second configuration message on the HPON. The method further includes receiving at one or more of the plurality of receivers at the OLT one or more configuration response messages from one or more ONUs in a second set of ONUs, wherein the ONUs in the second set of ONUs do not belong to the first set of ONUs. The method also includes, based on the configuration response messages from the second set of ONUs, associating, in the database, each ONU in the second set of ONUs with the second wavelength and with the receiver receiving the configuration response message from the ONU. | 11-06-2008 |
20090047019 | Method and System for Communicating Optical Traffic - A method for communicating optical traffic includes adding optical traffic to an optical ring comprising a plurality of nodes and communicating the optical traffic on the optical ring. The optical traffic comprises a plurality of virtual wavebands which comprise a first virtual waveband of traffic comprising a first number of wavelengths and a second virtual waveband of traffic comprising a second number of wavelengths. The second number is different from the first number. The method also includes dropping the first virtual waveband of traffic at a first node of the plurality of nodes and dropping the second virtual waveband of traffic at a second node of the plurality of nodes. | 02-19-2009 |
20090201564 | Monitoring Modulator Bias Using Photon Absorption - Monitoring a bias point of an optical modulator includes receiving an optical signal modulated by the optical modulator. Photons of the optical signal are received at a photon reactive material operable to produce a reaction in response to the arrival of a predetermined number of photons. Reactions are produced in response to the arrival of the photons of the optical signal. Feedback is generated in response to the reactions. The feedback reflects the waveform of the optical signal, and indicates one or more bias points of the optical modulator. | 08-13-2009 |
20090214202 | Selecting Wavelengths And Routes In An Optical Network - Selecting a wavelength and a route includes facilitating communication through routes among nodes. Each route is associated with a plurality of wavelengths and comprises one or more segments that couple one node to another node. A polarization mode dispersion value is determined for each wavelength of each route to yield polarization mode dispersion values for each route. A wavelength and a route are selected according to the polarization mode dispersion values. | 08-27-2009 |
20090245805 | System and Method for Communicating Wireless Data Utilizing a Passive Optical Network - In one embodiment, a method for providing wireless communications utilizing a passive optical network (PON) is disclosed. The method includes receiving, at a PON, downstream packets from a base station destined for a mobile station, and transmitting the downstream packets to wireless transceivers associated with PON. The method also includes receiving, at the first wireless transceiver communicatively coupled to a first optical network terminal (ONT), the downstream packets from the first ONT and transmitting a first wireless signal comprising the downstream packets to a first cell. The method also includes receiving, at a second wireless transceiver communicatively coupled to a second ONT, the downstream packets from the second ONT and transmitting a second wireless signal comprising the downstream packets to a second cell. | 10-01-2009 |
20100142028 | Magneto-Optic Optical Modulator - In accordance with a particular embodiment of the present invention, a device for modulating an optical beam is provided. The device may include a substrate comprising a non-ferromagnetic material and a thin film comprising a ferromagnetic semiconductor material disposed on the substrate. The thin film may be disposed on the substrate such that at least part of an optical beam incident on the thin film at an angle reflects off of a surface of the thin film. The thin film may be responsive to a magnetic field applied to the thin film such that varying the magnetic field varies the polarization of the light beam reflected off of the surface of the thin film. | 06-10-2010 |
20100150569 | System And Method For Optoelectrical Communication - A method for upgrading an optoelectrical system includes securing a transmitter to a line card, wherein the line card comprises an optoelectrical connector. It also includes coupling the transmitter to the connector, wherein the connector comprises an embedded fiber configured to be coupled to the transmitter. In addition, the method includes inserting a pluggable form factor module comprising a receiver, an input port, and an output port into a cage secured to the line card. Further, the method includes coupling the pluggable form factor module to the connector such that an optical signal transmitted by the transmitter propagates in an optical line of sight between the embedded fiber of the connector and the output port. The connector comprises electrical contacts that are configured to be coupled to the module such that the receiver can convert optical signals received at the input port into electrical signals and transmit the electrical signals to the line card via the connector. | 06-17-2010 |
20100150570 | System And Method For Optoelectrical Communication - A system for optoelectrical communication includes a transmitter configured to transmit optical signals. It also includes a pluggable form factor module. The module includes an input port, an output port, and a receiver configured to convert optical signals received at the input port into electrical signals. The system further includes an optoelectrical connector coupled to the module and the transmitter. The connector includes an embedded fiber coupled to the transmitter and configured to transmit the optical signals from the transmitter to the output port of the module. The connector also includes electrical contacts configured to receive the electrical signals from the receiver. The system includes a cage in a pluggable form factor configured to house the module and the connector, wherein the transmitter is positioned outside the cage. | 06-17-2010 |
20100266281 | Allocating Demand According To Demand Weight - According to one embodiment, allocating demand includes receiving a demand graph that describes demands of a network. One or more weights are calculated for each demand. The demands are allocated according to the weights of the demands to optimize optical line card sharing. | 10-21-2010 |
20100329120 | Determining Disjoint Paths With An Optimized Number Of Regenerators - According to particular embodiments, determining disjoint paths includes receiving a graph representing a network comprising nodes and links. The graph is transformed such that the number of intermediate nodes of a path indicates the number of regenerators for the path. A set of seed paths from a source node to a destination node of the transformed graph is generated. For each seed path, a shortest path from the source node to the destination node is determined to yield one or more pairs of disjoint paths from the source node to the destination node. An optimized pair of disjoint paths is selected, where the optimized pair of disjoint paths has an optimized number of regenerators. | 12-30-2010 |
20110043897 | Optical Amplifier Card with Pluggable Pump Laser Modules - A system for optical communication including an optical amplifier card configured to receive a plurality of pump laser modules. The optical amplifier card includes a receptacle configured to receive the pump laser module, a connector configured to couple the pump laser module to the optical amplifier card, a monitor configured to measure at least the optical output power of the pump laser module, and a pump combiner communicatively coupled to the monitor. The pump combiner is configured to receive a signal from the monitor indicating a drop in the output power of a first pump laser module below a threshold level, and, in response to the signal, switch the optical amplifier card from using the optical power of the first pump laser module to using the optical power of a second pump laser module without substantially affecting normal operation of the optical amplifier card. | 02-24-2011 |
20110044689 | METHOD AND SYSTEM FOR CROSS-PHASE-MODULATION NOISE REDUCED TRANSMISSION IN HYBRID NETWORKS - A system for cross-phase-modulation-noise reduced transmission in hybrid networks includes a first, second, and third set of optical transmitters. The first set of optical transmitters transmits a set of ten gigabit per second signals. The second set of optical transmitters transmits a set of forty gigabit per second signals. The third set of optical transmitters transmits a set of one hundred gigabit per second signals. On a wavelength spectrum, the set of 10 G signals is immediately adjacent to the set of 100 G signals, and the set of 100 G signals is immediately adjacent to the set of 40 G signals. The set of 10 G signals and the set of 100 G signals are not separated by a guard band. In addition, the set of 100 G signals and the set of 40 G signals are also not separated by a guard band. | 02-24-2011 |
20110044698 | Free-Space DQPSK Demodulator - A demodulator comprises an input splitter, optical device sets, and couplers. The input splitter splits an input signal comprising symbols to yield a number of signals. A first optical device set directs a signal of along a first path. A second optical device set directs another signal along a second path to yield a delayed signal. At least a portion of the second path is in free space. A path length difference between the first path and the second path introduces a delay between the first signal and the second signal. A coupler receives a portion of the signal and a portion of the delayed signal to generate interference, where the interference indicates a phase shift between a phase corresponding to a symbol and a successive phase corresponding to a successive symbol. | 02-24-2011 |
20110080846 | Determining Paths In A Network With Asymmetric Switches - According to particular embodiments, determining paths in a network with asymmetric switches includes receiving a graph representing the network. Each asymmetric switch has defined degree connectivity between one or more pairs of degrees of the asymmetric switch. The graph is transformed to yield a transformed graph that accounts for the asymmetric switches. A routing process is applied to the transformed graph to yield one or more paths through the network. | 04-07-2011 |
20110103529 | Estimating Frequency Offset Using A Feedback Loop - According to particular embodiments, a signal communicated from a transmitter to a receiver is received. A frequency offset estimate of the signal is determined. The frequency offset estimate indicates a frequency difference between the transmitter and the receiver. The frequency offset estimate is provided as feedback. A next frequency offset is compensated for according to the feedback. | 05-05-2011 |
20110103791 | Method and System for Monitoring Optical Dispersion in an Optical Signal - A method is provided for dispersion compensation of an optical signal communicated in an optical network. The method may include receiving an optical signal comprising a plurality of channels. The method may further include filtering at least one channel from the plurality of channels. The method may also include analyzing the at least one channel of the plurality of channels to measure optical dispersion in the at least one channel. The method may additionally include compensating for optical dispersion based on the measured dispersion. | 05-05-2011 |
20110150479 | Multi-Level Polarization Multi-Level Phase Modulator - An apparatus for use with an optical computation system may comprise a monolithic device with no free space optical components and may include a phase modulator and a polarization modulator. The phase modulator may be configured to receive a beam of light and two digital data streams and operable to modulate the phase of the beam of light to at least four phase states, the at least four phase states representing the two digital data streams. The polarization modulator may be configured to receive two additional digital data streams and the modulated beam of light from the phase modulator and operable to modulate the polarization of the beam of light to at least four polarization states, the at least four polarization states representing the two additional digital data streams. | 06-23-2011 |
20110167183 | Minimizing Interconnections In A Multi-Shelf Switching System - In certain embodiments, minimizing interconnections in a multi-shelf switching system includes receiving a map describing the switching system, where the switching system comprises shelves and input/output (I/O) points. The map is transformed to yield a graph comprising nodes and edges. A node represents an I/O point, and a node weight represents a number of interface cards of the I/O point represented by the node. An edge between a node pair represents traffic demand between the I/O points represented by the node pair, and an edge weight represents the amount of the traffic demand represented by the edge. The graph is partitioned to yield a groups that minimize interconnection traffic among the shelves, where each group represents a shelf of the multi-shelf switching system. | 07-07-2011 |
20110176813 | Method and System for Electrical Domain Optical Spectrum Shaping - A system is provided for electrical domain optical spectrum shaping. The system may include a laser, a modulator, a first electrical filter, and a second electrical filter. The laser may be configured to output an optical carrier signal. The modulator may be configured to modulate the optical carrier signal to output a modulated optical signal based on a first filtered input signal and a second filtered input signal received by the modulator. The first electrical filter may be configured to filter a first input signal to produce the first filtered input signal. The second electrical filter may be configured to filter a second input signal to produce the second filtered input signal. | 07-21-2011 |
20110206374 | System and Method for Demand Aggregation in Optical Networks Employing Shared Ring Protection - In accordance with embodiments of the present disclosure, a method for demand aggregation is provided. The method may include routing demands in a ring network such that a length for each routed demand does not exceed a route length maximum, and a load imbalance at each node in the ring network is minimized. The method may also include maximizing optical line card sharing by assigning routed demands sharing common ends to the same wavelength. | 08-25-2011 |
20110223958 | System and Method for Implementing Power Distribution - A method for adjusting power distribution includes establishing a connection between a base station and a plurality of remote transceivers. The method also includes establishing a plurality of wireless connections with a plurality of endpoints via one or more of the plurality of remote transceivers. The method further includes determining a signal quality indication for each of the plurality of remote transceivers for any endpoint for which the remote transceiver is able to receive a wireless communication. The method also includes determining a power distribution for the plurality of remote transceivers based on the determined signal quality indication for each of the remote transceivers, the power distribution indicative of the amount of power each remote transceiver is to use for each endpoint when transmitting wireless communications. | 09-15-2011 |
20110242995 | SYSTEMS AND METHODS FOR MULTI-DOMAIN ROUTING - Systems and methods for multi-domain routing are provided. In some embodiments, a method for determining a path calculation from a source node to a destination node over a multi-domain network is provided. The method may include steps for receiving a predetermined sequence of domains for communicating information from the source node to the destination node, determining a link type for each of a plurality of links in the predetermined sequence of domains, modifying the link type of one or more of the plurality of links such that the plurality of links are unidirectional links towards a destination node, and determining a path along the predetermined sequence of domains based on the modified plurality of links. | 10-06-2011 |
20110243030 | SYSTEMS AND METHODS FOR DETERMINING PROTECTION PATHS IN A MULTI-DOMAIN NETWORK - Systems and methods for determining multiple paths in a multi-domain network are provided. In some embodiment, a method for determining multiple paths in a network is provided. The method may include determining a first path between a source node and a destination node and determining a second path disjoint from the first path. In some embodiments, to determine the second path includes determining which ingress nodes are available in a domain that includes the destination node, where the available ingress nodes are not part of the first path, and implementing a disjoint path algorithm for each of the available ingress nodes. To determine the first path includes implementing forward path calculations. | 10-06-2011 |
20120063768 | METHOD AND SYSTEM FOR CANCELLATION OF CHROMATIC DISPERSION COMBINED LASER PHASE NOISE - Methods and systems are provided for cancellation of chromatic dispersion combined laser phase noise. A method may include measuring a differential of laser phase noise using two optical pilot signals, the pilot signals each having a different optical frequency, or using an optical carrier and a pilot signal. The method may also include determining an approximate laser phase noise present in an optical system based on the measured differential of laser phase noise. The method may further include compensating for laser phase noise based on the determined approximate laser phase noise. | 03-15-2012 |
20120066347 | Method and System for Facilitating Remote Downloading - A method for facilitating remote downloading includes receiving, at a home media gateway associated with at least a first endpoint, a remote download request generated by a web browser running on the first endpoint. The remote download request is relayed to the home media gateway via at least one component of a wireless service provider's network. The wireless service provider provides user authentication for the remote download request. The remote download request includes an address associated with at least one file hosted by a remote server. The method also includes downloading the at least one file from the remote server to the home media gateway. The method further includes, upon detecting a presence of the first endpoint, uploading the at least one file from the home media gateway to the endpoint. | 03-15-2012 |
20120096122 | System and method for facilitating remote downloading - A method for facilitating remote downloading, in accordance with particular embodiments, includes receiving, at a proxy server maintained by a wireless service provider, a remote download request. The remote download request is relayed to the proxy server via at least one component of a wireless service provider's network. The remote download request includes an address associated with at least one file hosted by a remote server. The method also includes downloading the at least one file from the remote server to the proxy server. Upon detecting a presence of the endpoint, the method includes transferring the at least one file from the proxy server to the endpoint via a femto base station associated with the endpoint. | 04-19-2012 |