Optical Switching Patents (Class 398/45)
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Patent number: 10034222Abstract: An embodiment method includes receiving service parameters for a service and locating logical network nodes for a service-specific data plane logical topology at respective physical network nodes among a plurality of physical network nodes according to the service parameters, a service-level topology, and a physical infrastructure of the plurality of physical network nodes. The method also includes defining connections among the logical network nodes according to the service parameters, the service-level topology, and the physical infrastructure, and defining respective connections for a plurality of UEs to at least one of the logical network nodes according to the service parameters, the service-level topology, and the physical infrastructure. The method further includes defining respective functionalities for the logical network nodes.Type: GrantFiled: June 5, 2014Date of Patent: July 24, 2018Assignee: Huawei Technologies Co., Ltd.Inventors: Hang Zhang, Aaron James Callard, Nimal Gamini Senarath, Petar Djukic, Alex Stephenne, Ngoc Dung Dao, Hamidreza Farmanbar, Xu Li, Kaveh Shafiee, Philippe Leroux
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Patent number: 10020880Abstract: A reconfigurable free-space optical inter-rack network includes a plurality of server racks, each including at least one switch mounted on a top thereof, where each top-mounted switch includes a plurality of free-space-optic link connector, each with a free-space optical connection to a free-space-optic link connector on another top-mounted switch, a single ceiling mirror above the plurality of server racks that substantially covers the plurality of server racks, wherein the single ceiling mirror redirects optical connections between pairs of free-space-optic link connectors to provide a clear lines-of-sight between each pair of connected free-space-optic link connectors, and a controller that preconfigures a free-space optical network connecting the plurality of server racks by establishing connections between pairs of free-space-optic link connectors, and that reconfigures connections between pairs of free-space-optic link connectors in response to network traffic demands and events.Type: GrantFiled: November 6, 2015Date of Patent: July 10, 2018Assignee: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OFNEW YORKInventors: Himanshu Gupta, Navid Hamed Azimi, Samir Ranjan Das, Jon Patrick Longtin, Vyas Sekar, Max S. Curran
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Patent number: 10003865Abstract: A spectral-temporal connector interconnects a large number of nodes in a full-mesh structure. Each node connects to the spectral-temporal connector through a dual link. Signals occupying multiple spectral bands carried by a link from a node are de-multiplexed into separate spectral bands individually directed to different connector modules. Each connector module has a set temporal rotators and a set of spectral multiplexers. A temporal rotator cyclically distributes segments of each signal at each inlet of the rotator to each outlet of the rotator. Each spectral multiplexer combines signals occupying different spectral bands at outlets of the set of temporal rotators onto a respective output link. Several arrangements for time-aligning all the nodes to the connector modules are disclosed.Type: GrantFiled: May 8, 2017Date of Patent: June 19, 2018Inventor: Maged E. Beshai
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Patent number: 9980021Abstract: A scalable switch fabric using optical interconnects includes one or more line modules each including fabric interface optics supporting a plurality of optical output signals; an optical interconnect optically connected to each of the one or more line modules via the fabric interface optics; and one or more center stage switches, wherein the optical interconnect is adapted to shuffle the plurality of optical output signals from each of the one or more line modules to the one or more center stage switches. The optical interconnect can include two levels of shuffle to distribute each of the plurality of optical signals from each of the fabric interface optics to the one or more center stage switches.Type: GrantFiled: October 7, 2016Date of Patent: May 22, 2018Assignee: Ciena CorporationInventors: John K. Oltman, Jeffery T. Nichols
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Patent number: 9973294Abstract: A node in an optical network may include a wavelength selective switch (WSS) and a processor. The wavelength selective switch may have a plurality of input ports and a plurality of output ports for routing and/or power-controlling of optical slices. The wavelength selective switch may have a plurality of control passbands, each control passband including a one or more optical slices. The processor may determine a passband group (PBG) having a plurality of PBG passbands, each of the plurality of PBG passbands corresponding to a particular control passband. The PBG may be used to translate control information, notifications, and/or instructions.Type: GrantFiled: August 12, 2016Date of Patent: May 15, 2018Assignee: Infinera CorporationInventors: Parveen Kumar Gupta, Nikhil Kumar Satyarthi, Omer Faruk Yilmaz
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Patent number: 9967053Abstract: Methods and systems are provided for determining a shortest minimum regeneration path in an optical network. The method includes creating a virtual node at a source node, the source node communicatively coupled to a destination node through a plurality of nodes and links. The method includes traversing the virtual nodes, wherein traversing the virtual nodes comprises selecting an unvisited virtual node at a node; identifying a candidate virtual node from the unvisited virtual node; determining whether the candidate virtual node exceeds a maximum permitted weight; determining whether the candidate virtual node violates a shortest minimum regeneration path condition; and creating the new virtual node from the candidate virtual node if the candidate virtual node does not exceed the maximum permitted weight and if the candidate virtual node does not violate the shortest minimum regeneration path condition.Type: GrantFiled: May 31, 2016Date of Patent: May 8, 2018Assignee: Fujitsu LimitedInventors: Inwoong Kim, Xi Wang, Qiong Zhang, Paparao Palacharla, Tadashi Ikeuchi
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Patent number: 9923661Abstract: Provided are a device unit, a node device, and a method and a system for automatically adjusting a tunnel bandwidth. The device unit includes: a client side element, configured to dynamically adjust The quantity of the first timeslots according to a bandwidth of a received data service before the received data service is mapped to an Optical Channel Data Unit (ODU) tunnel; a line side element, configured to configure, according to the quantity of the first timeslots adjusted by the client side element, The quantity of the second timeslots matched with the first timeslots; a tunnel managing element, configured to adjust, according to the quantity of the first timeslots and the quantity of the second timeslots, the quantity of unblocked ODU tunnels between the client side element and the line side element, wherein unblocked ODU tunnels after the adjustment carry the data service.Type: GrantFiled: March 21, 2014Date of Patent: March 20, 2018Assignee: ZTE CORPORATIONInventors: Wenbin Liu, Xilin Liu
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Patent number: 9918401Abstract: According to some examples, a bay is provided to receive at least a portion of a housing of a removable device, where the bay includes a management controller to communicate a management signal to the removable device received by the bay, and a cooling mechanism to provide airflow to the removable device received by the bay. The removable device may be one that receives an optical cable, receives an electrical cable, converts a first optical signal received through the optical cable to a first electrical signal transmitted through the electrical cable, and converts a second electrical signal received through the electrical cable to a second optical signal transmitted through the optical cable.Type: GrantFiled: December 17, 2015Date of Patent: March 13, 2018Assignee: Hewlett Packard Enterprise Development LPInventors: Kevin B Leigh, John Norton, Darrel G Gaston, Matthew E Stevens
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Patent number: 9918148Abstract: Systems and methods implemented by an all-optical switch configured to switch signals optically in an optical network include receiving and processing call information from a messaging/signaling session, wherein the call information relates to one or more calls on ports in the all-optical switch; and configuring the ports in the all-optical switch in the network based on the processed call information. The call information can include detection of one of a fault and a lockout on the one or more ports and an indication of faults in the optical network. One of a control plane and an SDN controller can be connected to the all-optical switch via the messaging/signaling session.Type: GrantFiled: August 7, 2017Date of Patent: March 13, 2018Assignee: Ciena CorporationInventors: Gerard Leo Swinkels, Darren Hennigar, Choudhury A. Al Sayeed
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Patent number: 9894015Abstract: The communication apparatus includes: a first circuit board unit including, on a front surface of the communication apparatus, a port for transmitting and receiving data to and from the network; a second circuit board unit including a plurality of first connectors connected to at least one of the first circuit board units, a second connector being capable of accommodating at least a bandwidth accommodated by the plurality of first circuit board units, and being connected, via a cable, to the other communication apparatus of a standby system; and a cross bar switch for selectively outputting data to the first connectors or the second connector as a data output destination, and a ventilation control unit for controlling a flow of air flowing between each of the first circuit board unit and the second circuit board unit, and outside of the communication apparatus.Type: GrantFiled: August 6, 2014Date of Patent: February 13, 2018Assignee: Alaxala Networks CorporationInventor: Junji Baba
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Patent number: 9891898Abstract: A method involves compiling a first amount of high-level programming language code (for example, P4) and a second amount of a low-level programming language code (for example, C) thereby obtaining a first section of native code and a second section of native code. The high-level programming language code at least in part defines how an SDN switch performs matching in a first condition. The low-level programming language code at least in part defines how the SDN switch performs matching in a second condition. The low-level code can be a type of plugin or patch for handling special packets. The sections of native code are loaded into the SDN switch such that a first processor (for example, x86 of the host) executes the first section of native code and such that a second processor (for example, ME of an NFP on the NIC) executes the second section of native code.Type: GrantFiled: June 4, 2016Date of Patent: February 13, 2018Assignee: Netronome Systems, Inc.Inventor: Johann H. Tonsing
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Patent number: 9859982Abstract: A distributed antenna system includes a headend device for generating a downlink transmission signal by combining a plurality of downlink RF signals in different frequency bands, received from a plurality of base stations, and converting the downlink transmission signal into a downlink optical signal, a main remote device for receiving the downlink optical signal from the headend device, converting the downlink optical signal into the downlink transmission signal, and amplifying the plurality of downlink RF signals included in the downlink transmission signal, and a sub-remote device for receiving the downlink transmission signal distributed from the main remote device, and amplifying the plurality of downlink RF signals included in the received downlink transmission signal.Type: GrantFiled: February 7, 2017Date of Patent: January 2, 2018Assignee: SOLiD, INC.Inventors: Yeongshin Yeo, Hwansun Lee, Youngju You
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Patent number: 9843391Abstract: Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a system comprises a hub and at least one node located remotely from the hub. The hub is coupled to the node by first and second fiber paths, the first fiber path comprising an uplink fiber and a downlink fiber, the second fiber path comprising an uplink fiber and a downlink fiber. The node is coupled to the downlink fibers of the first and second fiber paths via an optical combiner, and is further coupled to the uplink fibers of the first and second fiber paths via an optical splitter. The node further monitors a signal quality of a downlink optical signal and communicates to the hub information indicative of the signal quality. The hub switches communications between the hub and the node from the first to second fiber path based on the information.Type: GrantFiled: July 31, 2014Date of Patent: December 12, 2017Assignee: CommScope Technologies LLCInventors: John Sabat, Jr., Thomas G. Hebert
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Patent number: 9831977Abstract: Systems and methods for routing wavelengths in an optical network include responsive to a path request for a wavelength or group of wavelengths, determining a path through the optical network; determining a location on the path where wavelength blocking should occur to form a loop-free path in the optical network; and setting the wavelength blocking at the location. The optical network can utilize a broadcast and select architecture and the wavelength blocking is configured to prevent the wavelength or group of wavelengths from looping back on a port where the wavelength or group of wavelengths has already been received on. The optical network can utilize an all-broadcast architecture and the wavelength blocking is configured to prevent multiple paths for the wavelength or group of wavelengths by constraining the wavelength or group of wavelengths to a single path through the optical network.Type: GrantFiled: October 27, 2016Date of Patent: November 28, 2017Assignee: Ciena CorporationInventors: David Weldon Boertjes, Stephen Daniel Shew
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Patent number: 9831948Abstract: A passive optical network (PON) device and method for optical power measurement along an optical transmission path supporting bidirectional propagation of downstream light and upstream light between two network elements of a PON is provided. The device includes an optical power splitter assembly extracting respective portions of the upstream and downstream light, and an upstream wavelength analyzer determining, from the extracted upstream light, an upstream spectral characteristic of the upstream light. The device also includes a processing unit determining, based on the upstream spectral characteristic, a downstream spectral characteristic of a downstream signal of interest among a plurality of downstream signals of the downstream light, and a downstream filter assembly filtering the extracted downstream light to select a portion of the downstream signal of interest.Type: GrantFiled: September 13, 2016Date of Patent: November 28, 2017Assignee: EXFO INC.Inventors: Bernard Ruchet, Mario L'Heureux, Daniel Gariepy
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Patent number: 9806909Abstract: The present invention discloses a data switching apparatus and system, where the data switching apparatus includes: an optical-to-electrical conversion unit, an identification unit, an electrical switching unit, an electrical-to-optical conversion unit, an optical switching control unit, and an optical switching unit. The optical-to-electrical conversion unit is configured to perform optical-to-electrical conversion on a first optical data packet and an optical label, where the optical label carries switching information of a second optical data packet, and the first optical data packet and the second optical data packet are respectively to-be-switched data packets that need to use electrical packet switching and optical packet switching. The identification unit is configured to identify whether an electrical signal output by the optical-to-electrical conversion unit is from the optical label or the first optical data packet.Type: GrantFiled: July 26, 2016Date of Patent: October 31, 2017Assignee: Huawei Technologies Co., Ltd.Inventors: Yan Wang, Xiaoling Yang, Huixiao Ma
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Patent number: 9798683Abstract: Data storage systems and methods for storing data in computing nodes of a super computer or compute cluster are described herein. The super computer storage may be coupled with a primary storage system. In addition to a CPU and memory, non-volatile memory is included with the computing nodes as local storage. The super computer includes a plurality of computing groups, each including a plurality of computing nodes. There is one burst buffer fabric per group and one input/output node per group. When data bursts occur, data may be stored by a first computing node on the local storage of a second computing node in the computing group through the burst buffer fabric without interrupting the CPU in the second computing node. Further, the local storage of other computing nodes may be used to store redundant copies of data from a first computing node to make the super computer data resilient.Type: GrantFiled: May 9, 2014Date of Patent: October 24, 2017Assignee: DataDirect Networks, Inc.Inventors: Paul Nowoczynski, Michael Vildibill, Jason Cope, Pavan Uppu
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Patent number: 9768870Abstract: A method includes automatically detecting an association between members based on their relationship to one another; sharing topology and cluster information between the members; and determining roles for each member, based on the topology and cluster information and rules, wherein the roles are used to automatically provision at least one resource on each member, without user intervention. A method of configuring network devices sharing a pool of available resources is also described, wherein the network devices have management connectivity between one another through a plurality of point-to-point connections. The method includes, after a point-to-point connection in the management connectivity is formed based on cabling of associated network devices, determining a resource index number for each of the associated network devices; and uniquely assigning the resources from the pool to each of the network devices based on their respective resource index number.Type: GrantFiled: February 25, 2015Date of Patent: September 19, 2017Assignee: Ciena CorporationInventors: David J. Miedema, Michael Watford, Xiaoqing Hu, Ross Caird, Rodd Lamarche, Zenon Slodki
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Patent number: 9756405Abstract: Systems and methods for controlling an optical switch via one of a control plane and Software Defined Networking (SDN) include associating one or more managed endpoints with one or more line ports of an optical switch; receiving state information for the one or more managed endpoints over a session associated with one of the control plane and the SDN; and controlling switching of the one or more line ports based on the state information for the one or more managed endpoints. The optical switch is an all-optical device which does not have access to digital signal quality information of associated signals.Type: GrantFiled: October 6, 2015Date of Patent: September 5, 2017Assignee: Ciena CorporationInventors: Gerard Leo Swinkels, Darren Hennigar, Choudhury A. Al Sayeed
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Patent number: 9742518Abstract: A network capable of being used in a datacenter is described. In some embodiments, the network can comprise a set of optical fiber rings, wherein each optical fiber ring carries data traffic on one or more wavelengths, and wherein each optical fiber ring is partitioned into multiple sectors. A reconfigurable optical add-drop multiplexer (ROADM) can be coupled to at least one optical fiber in each of at least two sectors. An electro-optical-switch can be coupled to each ROADM in each of the at least two sectors. A set of switches can be coupled to each electro-optical-switch in each of the at least two sectors. The set of switches can comprise a first layer of aggregation switches that is coupled to a second layer of edge switches, wherein the edge switches can be coupled to servers in a datacenter.Type: GrantFiled: October 1, 2013Date of Patent: August 22, 2017Assignee: Indian Institute of Technology BombayInventors: Ashwin Gumaste, Bala Murali Krishna Bheri
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Patent number: 9729261Abstract: A transmission apparatus includes: a first mapping unit configured to allocate a first frame that stores a client signal to an intermediate frame; a second mapping unit configured to allocate the intermediate frame to a second frame that has a higher bit rate than a bit rate of the first frame; and a rate controller configured to control a bit rate of the intermediate frame based on the bit rate of the first frame and the bit rate of the second frame.Type: GrantFiled: January 12, 2015Date of Patent: August 8, 2017Assignee: FUJITSU LIMITEDInventors: Wataru Odashima, Hayato Furukawa, Toru Katagiri
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Patent number: 9729948Abstract: Systems and methods for discovery of a controller in an OpenFlow network may include using an OpenFlow capable switch to discover the controller without the help of other components, such as DHCP. The link discovery protocol may be configured on the switch and the discovery process may use an out-of-band or an in-band communication. In one example, a link discovery protocol packet is sent out of all ports of a switch that meet the eligibility criteria. The response is guaranteed because of a TTL like mechanism in the packet. Each port on a switch that receives this link discovery protocol packet takes an action depending on its current state.Type: GrantFiled: April 7, 2016Date of Patent: August 8, 2017Assignee: Infinera CorporationInventors: Ramesh Subrahmaniam, Madhukar Anand, Balaji Balasubramanian
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Patent number: 9722723Abstract: The present invention and its embodiments are made to provide for dynamic hitless resizing in optical transport network without any identification of matching time slots by the Network Management System (NMS) or any control plane signaling including Generalised Multi Protocol Label Switching (GMPLS). An aspect of the invention provides for a method of hitless ODUflex connection resizing in an optical transport network by incrementing or decrementing the ODUflex connection between the nodes, based on an indication command given to a source node for bandwidth increase or decrease, by identifying and matching at least one time slot through Link Connection Resizing (LCR) protocol message exchanges. Another aspect of the invention provides for a method of hitless ODUflex connection resizing in an optical transport network by decrementing the matching time slot used for the incrementing operation, in case of unsuccessful incrementing operation between nodes.Type: GrantFiled: September 13, 2013Date of Patent: August 1, 2017Assignee: TEJAS NETWORKS LTD.Inventors: Nishant Sharma, Nikhil Kumar Satyarthi
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Patent number: 9712273Abstract: Optical signals with different orbital angular momentum (OAM) modes are used to multiplex data for different receiver together or a light signal. The OAM based multiplexing may be used in addition to other multiplexing schemes such as time division multiplexing, polarization multiplexing and so on. Capacity of existing optical network infrastructure can be increased significantly using OAM modulation, and data communication can be secured at the same time.Type: GrantFiled: May 12, 2015Date of Patent: July 18, 2017Assignee: ZTE CorporationInventors: Jianjun Yu, Yuan Fang
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Patent number: 9692511Abstract: A reconfigurable and redundant electro-optical connector and corresponding method are provided. The connector may include a first plurality of transducers in communication with a first port and a second plurality of transducers in communication with a second port, the first port and the first transducers defining a first channel and the second port and the second transducers defining a second channel. The connector may include a selective combiner to combine the first optical signals and the second optical signals, and a controller in communication with each of the transducers. The controller may transmit at least a first portion of a first datalink on at least the first channel in a first configuration. The controller may redistribute the first portion of the first datalink onto at least the second channel in a second configuration.Type: GrantFiled: March 28, 2016Date of Patent: June 27, 2017Assignee: Mellanox Technologies, Ltd.Inventors: Alon Webman, Evelyn Landman, Eyal Waldman, Elad Mentovich, Sylvie Rockman, Itshak Kalifa, Yaakov Gridish
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Patent number: 9647792Abstract: A spectral-temporal connector interconnects a large number of nodes in a full-mesh structure. Each node connects to the spectral-temporal connector through a dual link. Signals occupying multiple spectral bands carried by a link from a node are de-multiplexed into separate spectral bands individually directed to different connector modules. Each connector module has a set temporal rotators and a set of spectral multiplexers. A temporal rotator cyclically distributes segments of each signal at each inlet of the rotator to each outlet of the rotator. Each spectral multiplexer combines signals occupying different spectral bands at outlets of the set of temporal rotators onto a respective output link. Several arrangements for time-aligning all the nodes to the connector modules are disclosed.Type: GrantFiled: June 17, 2015Date of Patent: May 9, 2017Inventor: Maged E. Beshai
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Patent number: 9628879Abstract: A matrix M is used to determine groups of potential regenerator placements and obtain potential end-to-end optical paths by selecting desired sequences of regenerators. Then, a hierarchical guided search may be employed to efficiently select desired N-tuple disjoint optical paths from the potential optical paths. The hierarchical guided search may employ a search graph and a search tree to guide the search and to eliminate candidate nodes and optical paths early in the search process.Type: GrantFiled: January 13, 2015Date of Patent: April 18, 2017Assignee: Fujitsu LimitedInventor: Martin Bouda
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Patent number: 9560428Abstract: An apparatus comprising a first tunable transmitter array comprising a first tunable transmitter and a second tunable transmitter and a cyclic array waveguide grating (AWG) wavelength router coupled to the first tunable transmitter array, wherein the cyclic AWG wavelength router comprises a plurality of input ports and a plurality of output ports, wherein the cyclic AWG wavelength router is configured to receive a first optical signal emitted from a first tunable transmitter via a first input port of the plurality of input ports, receive a second optical signal emitted from a second tunable transmitter via the first input port of the plurality of input ports, and route the first optical signal and the second optical signal to the output ports dependent on one or more wavelengths used to encode the first optical signal and the second optical signal.Type: GrantFiled: May 16, 2014Date of Patent: January 31, 2017Assignee: Futurewei Technologies, Inc.Inventor: Xuejin Yan
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Patent number: 9537714Abstract: The present disclosure presents a system and method for determining a logical topology of a network, given the network's physical topology. More particularly, a logical topology is implemented across a plurality of optical circuit switches that interconnect the nodes of a network. Each of the optical circuit switches includes an initial internal configuration. The internal configuration of the optical circuit switches are swapped to generate new logical topologies. A fitness is determined for each of the generated topologies. The fitnesses of the topologies are then ranked and the most fit logical topology is implemented in the network.Type: GrantFiled: July 9, 2014Date of Patent: January 3, 2017Assignee: Google Inc.Inventors: Junlan Zhou, Amin Vahdat, Peter Peresini
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Patent number: 9537601Abstract: A method and device for transmitting data are disclosed, the method comprising: mapping the data to an ODUS, and mapping the ODUS into an OTUS, wherein the rate of the ODUS and the OTUS are M*100 Gb/s, M is a positive integer greater than or equal to 2, and the tributary slot size of the ODUS and the OTUS are 100 Gb/s; distributing the OTUS into M groups of electric channel signals, wherein each group of electric channel signals corresponds to N electric layer channels, N is a positive integer; and mapping all the data distributed into the electric channel signals by the OTUS into the same OChS for transmission, wherein the rate of the OChS is M*100 Gb/s, the M groups of electric channel signals are carried by a single frequency sequence or multiple non-continuous frequency sequences, each frequency sequence carries m groups of electric channel signals, 1?m?M, m is an integer. The disclosure improves optical fibber utilization efficiency as well as system flexibility and compatibility.Type: GrantFiled: August 30, 2013Date of Patent: January 3, 2017Assignee: ZTE CORPORATONInventors: Xihua Fu, Xinling Zhang
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Patent number: 9509428Abstract: Systems and methods for routing wavelengths in an optical network include responsive to a path request for a wavelength or group of wavelengths, determining a path through the optical network; determining a location on the path where wavelength blocking should occur to form a loop-free path in the optical network; and setting the wavelength blocking at the location. The optical network can utilize a broadcast and select architecture and the wavelength blocking is configured to prevent the wavelength or group of wavelengths from looping back on a port where the wavelength or group of wavelengths has already been received on. The optical network can utilize an all-broadcast architecture and the wavelength blocking is configured to prevent multiple paths for the wavelength or group of wavelengths by constraining the wavelength or group of wavelengths to a single path through the optical network.Type: GrantFiled: July 10, 2015Date of Patent: November 29, 2016Assignee: Ciena CorporationInventors: David Weldon Boertjes, Stephen Daniel Shew
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Patent number: 9503394Abstract: Host machines and other devices performing synchronized operations can be dispersed across multiple racks in a data center to provide additional buffer capacity and to reduce the likelihood of congestion. The level of dispersion can depend on factors such as the level of oversubscription, as it can be undesirable in a highly connected network to push excessive host traffic into the aggregation fabric. As oversubscription levels increase, the amount of dispersion can he reduced and two or more host machines can be clustered on a given rack, or otherwise connected through the same edge switch. By clustering a portion of the machines, some of the host traffic can he redirected by the respective edge switch without entering the aggregation fabric. When provisioning hosts for a customer, application, or synchronized operation, for example, the levels of clustering and dispersion can be balanced to minimize the likelihood for congestion throughout the network.Type: GrantFiled: December 7, 2015Date of Patent: November 22, 2016Inventors: Michael David Marr, Tyson J. Lamoreaux
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Patent number: 9491120Abstract: Crosstalk can be suppressed in photonic switching fabrics by activating unused photonic elements in a manner that manipulates the inactive connections and inhibits the propagation of cross-talk over the switching fabric. For example, unused photonic elements can be set to a cross or bar configuration to block first and second order crosstalk from propagating to the output ports, thereby reducing noise in the output signals. All of the unused elements can be activated in order to maximize crosstalk suppression. Alternatively, fewer than all of the unused elements may be activated to achieve a balance between crosstalk suppression and power conservation. Photonic switch architectures can be configured to use pre-determined cross-talk suppression maps (e.g., patterns of activated unused cells) for the various switching configurations, which may be computed using a recursive algorithm.Type: GrantFiled: September 4, 2013Date of Patent: November 8, 2016Assignee: Huawei Technologies Co., Ltd.Inventors: Hamid Mehrvar, Yi Qian, Patrick Dumais, Dominic John Goodwill, Eric Bernier
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Patent number: 9465425Abstract: A power sourcing equipment (PSE) device including a power over Ethernet (PoE) interface. A processor is coupled to the PoE interface. A memory is coupled to the processor and includes instruction that, when executed by the processor, cause the processor to perform a number of functions. The processor may supply power at a first power level to a PD that is coupled to the PoE interface. The processor may then determine an actual power consumption of the PD. The processor may then send a first Link Layer Discovery Protocol (LLDP) packet to the PD over the PoE interface that includes first proposed power level information that is based on the actual power consumption of the PD. Then processor may then supply power to the PD at a second power level that is different from the first power level.Type: GrantFiled: September 3, 2015Date of Patent: October 11, 2016Assignee: Dell Products L.P.Inventors: Rabah S. Hamdi, Bradley J. Booth
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Patent number: 9392348Abstract: An apparatus comprising a path computation element (PCE) configured for at least partial impairment aware routing and wavelength assignment (RWA) and to communicate with a path computation client (PCC) based on a PCE protocol (PCEP) that supports path routing, wavelength assignment (WA), and impairment validation (IV). The PCEP comprises at least one operation selected from the group consisting of a new RWA path request operation and a path re-optimization request operation. Also disclosed is a network component comprising at least one processor configured to implement a method comprising establishing a PCEP session with a PCC, receiving path computation information comprising RWA information and constraints from the PCC, and establishing impairment aware RWA (IA-RWA) based on the path computation information and a private impairment information for a vendor's equipment.Type: GrantFiled: November 7, 2014Date of Patent: July 12, 2016Assignee: Futurewei Technologies, Inc.Inventors: Young Lee, Greg Bernstein
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Patent number: 9363208Abstract: The deployment and scaling of a network of electronic devices can be improved by utilizing one or more network transpose boxes. Each transpose box can include a number of connectors and a meshing useful for implementing a specific network topology. Different tiers of a network can be connected to one or more of the network transpose boxes, and operated as a logical switch. A control server can be used to manage the control plane operations of the logical switch.Type: GrantFiled: March 29, 2011Date of Patent: June 7, 2016Assignee: Amazon Technologies, Inc.Inventors: Alan M. Judge, Mark N. Kelly, Jagwinder Singh Brar, Michael David Marr, Daniel T. Cohn
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Patent number: 9356625Abstract: A frame generation method in an optical transmission system that transmits a transmission frame including a payload area for storing therein information data and an FEC redundant area for storing therein an error correcting code with respect to the information data is provided, in which coding gain is calculated based on the quality of a communication path through which the transmission frame is transmitted, and, when it is determined that redundancy is insufficient with an error correcting code stored in the FEC redundant area based on the coding gain, a variable parity area for storing therein the error correcting code is set in the payload area and a transmission frame in which the error correcting code is stored in the FEC redundant area and the variable parity area is generated.Type: GrantFiled: December 8, 2011Date of Patent: May 31, 2016Assignee: Mitsubishi Electric CorporationInventor: Kazuo Kubo
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Patent number: 9354415Abstract: A fiber distribution hub (FDH) can include an enclosure defining an interior region and a frame body having a longitudinal axis. The frame body is rotatably mounted within the interior region of the enclosure such that the frame body can rotate about the longitudinal axis relative to the enclosure. The FDH further includes a plurality of splitters coupled to the frame body. Each splitter module has at least one splitter input and at least two splitter outputs. The FDH also includes a first plurality of adapters coupled to the frame body. The first plurality of adapters is configured to optically couple to splitter output cables. Additionally, the FDH can also include a storage retaining structure coupled to the frame body, the storage retaining structure being configured to selectively secure connectorized ends of splitter output cables.Type: GrantFiled: February 1, 2012Date of Patent: May 31, 2016Assignee: Opterna Technology LimitedInventors: K. R. Suresh Nair, Kizakkekuttu Parameswaran Chandran, Mathew Anjilimoottil Thomas, Biji Mathew Arakkakudy, Binoy J. Puthussery, E. K. Kiran Kumar, Beevi M. Mohammedali, P. V. Ashwin, Benoy Sarasan, Randy Reagan
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Patent number: 9330052Abstract: The deployment and scaling of a network of electronic devices can be improved by utilizing one or more network transpose boxes. Each transpose box can include a number of connectors and a meshing useful for implementing a specific network topology. When connecting devices of different tiers in the network, each device need only be connected to at least one of the connectors on the transpose box. The meshing of the transpose box can cause each device to be connected to any or all of the devices in the other tier as dictated by the network topology. When changing network topologies or scaling the network, additional devices can be added to available connectors on an existing transpose box, or new or additional transpose boxes can be deployed in order to handle the change with minimal cabling effort.Type: GrantFiled: August 9, 2013Date of Patent: May 3, 2016Assignee: Amazon Technologies, Inc.Inventors: Michael David Marr, Alan M. Judge, Jagwinder Singh Brar, Tyson J. Lamoreaux, Mark N. Kelly, Daniel T. Cohn
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Patent number: 9312965Abstract: An optical receiver module capable of increasing the range in which the error in distance between a collecting lens and a light receiving section is allowed is provided. In the optical receiver module according to the invention, the optical receiver includes a semiconductor substrate to which the light from the collecting lens is input, and through which the light passes, and a light receiving section disposed on a side (a reverse side) of the semiconductor substrate, the side being further from the collecting lens, and adapted to receive the light transmitted through the semiconductor substrate, and then convert the light into an electrical signal. On a side (an obverse side) of the semiconductor substrate, the side being nearer to the collecting lens, there is formed a lens surface adapted to converge light from the collecting lens toward the light receiving section.Type: GrantFiled: November 12, 2013Date of Patent: April 12, 2016Assignee: OCLARO JAPAN, INC.Inventors: Koki Iemura, Takashi Toyonaka, Hiroshi Hamada
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Patent number: 9312957Abstract: An optical transceiver device has an optical transceiver component, an O/E conversion substrate and a switch control substrate. The optical transceiver component is connected to the first, second optical fiber network equipments for the transmission of optical signal, respectively. The O/E conversion substrate is electrically connected to an in-line equipment at a first location for transmission of electrical signal, and may convert the received optical signal into the electrical signal or convert the received electrical signal into the optical signal. The switch control substrate is electrically connected with an optical switching switch and is connected with the in-line equipment at a second location to receive a control signal for the optical switch from the in-line equipment such that the optical switching switch operates at an normal mode or an bypass mode to guarantee normal network communication of the first, second optical network equipment.Type: GrantFiled: March 24, 2014Date of Patent: April 12, 2016Assignee: FORMERICA OPTOELECTRONICS INC.Inventors: Sean Jiang, Tung-Yi Yu, Shan-Ju Yang, Sheng-Wei Wu, Shih-Chi Cheng
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Patent number: 9287967Abstract: Disclosed is a method for transmitting wireless base band data, comprising: receiving a downlink base band signal transmitted by a base band processing unit (BBU), processing the downlink base band signal to module the downlink base band signal into a downlink intermediate frequency analog signal, and outputting the downlink intermediate frequency analog signal to an Ethernet cable; obtaining, from the Ethernet cable, an uplink intermediate frequency analog signal which is detected and fed back, and processing the uplink intermediate frequency analog signal; and taking the processed uplink intermediate frequency analog signal as a feedback input of digital pre-distortion (DPD), obtaining an intermediate frequency analog signal from the Ethernet cable, converting the intermediate frequency analog signal into an uplink base band signal, and sending the uplink base band signal to the BBU.Type: GrantFiled: August 23, 2013Date of Patent: March 15, 2016Assignee: ZTE CorporationInventor: Jianming Zhan
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Patent number: 9246627Abstract: A joint-optimization method addresses the generalized routing and wavelength assignment problem with variable number of combined 1+1 dedicated and shared connections. The inventive method enables a solution in time that is polynomial of the input size. Thus, the time complexity of the joint-optimization method is significantly less than that of existing methods.Type: GrantFiled: August 17, 2012Date of Patent: January 26, 2016Assignee: NEC Laboratories America, Inc.Inventors: Ankitkumar N. Patel, Philip Nan Ji, Yoshiaki Aono, Daisuke Taniguchi
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Patent number: 9246583Abstract: A method of determining a round trip delay time in a network comprising receiving a gate message allocating a transmission time window; retrieving a first timestamp from the gate message; setting a first clock to the time corresponding to the first timestamp, and wherein the first clock runs synchronously with a second clock recovered from a received data stream; sending upstream, after a time interval comprising a grant start time included in the transmission time window offset by a random delay time, a registration request message, wherein the registration request message includes a second timestamp obtained from the first clock; and determining a round trip delay (RTT) from a time the registration request message is received and the second timestamp.Type: GrantFiled: December 28, 2012Date of Patent: January 26, 2016Assignee: Futurewei Technologies, Inc.Inventors: Liming Fang, Jim Chen, Li Zhang
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Patent number: 9223336Abstract: A remote socket apparatus comprises a socket to receive a remote electronics unit. The socket is configured to house multiple media to connect to remote electronics housed in the remote electronics unit. The socket includes a socket interface configured to mate with a remote electronics unit interface. At least one of the socket and remote electronics unit further includes an actuation mechanism configured to connect the multiple media simultaneously. The remote socket apparatus can be utilized in a network that provides in-building wireless (IBW) communications and in a converged network that also provides wired in-building telecommunications.Type: GrantFiled: May 16, 2012Date of Patent: December 29, 2015Assignee: 3M Innovative Properties CompanyInventors: Kurt H. Petersen, Paul H. Benson, Stephen Paul LeBlanc, Laylonie L. Le Van-Etter, Curtis L. Shoemaker
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Patent number: 9178801Abstract: In general, techniques are described for automatically discovering services in computer networks. A service node comprising a control unit and an interface may implement the techniques. The control unit determines services provided by the service node and generates a routing protocol message that includes service discovery information related to the services. The interface transmits the routing protocol message to enable network devices of the network to discover the services provided by the service node based on the service discovery information. The interface then receives traffic via a path established based on the service discovery information included in the routing protocol message and configured so that the service node applies at least one of the services to the traffic received via the path. The control unit then applies the one or more services to the traffic received via the path.Type: GrantFiled: June 27, 2012Date of Patent: November 3, 2015Assignee: Juniper Networks, Inc.Inventors: James Guichard, David Ward, Jan Medved
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Patent number: 9160685Abstract: In one embodiment, a network switch includes multiple chips communicably coupled together and a buffered crossbar. Each chip is coupled to every other chip with two bi-directional serial channels and includes a slice of the buffered crossbar. One or more input ports, one or more output ports, and an input logic module are coupled to the plurality of chips, and the input logic module is configured to receive a packet of data, allocate the packet of data into one or more data fragments, and distribute the packet of data to the buffered crossbar. An output logic module is coupled to the chips and configured to retrieve the packet of data from the buffered crossbar, reconstruct the packet of data from the data fragments according to a gather scheme, and transmit the packet of data.Type: GrantFiled: March 9, 2012Date of Patent: October 13, 2015Assignee: Cisco Technology, Inc.Inventor: Madian Somasundaram
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Patent number: 9148222Abstract: The present invention concerns an AFDX network which is extended by a passive optical network or PON. The AFDX network comprises an AFDX switch to which are connected a plurality of equipments. The AFDX switch constitutes the optical line termination and said equipments constitute the optical network terminations of the PON. The PON broadcasts over the downlink, to all said equipments, every AFDX frame output by said AFDX switch. It also multiplexes over the uplink the AFDX frames transmitted by the same equipments. The invention also concerns an ?AFDX network using a PON.Type: GrantFiled: December 14, 2012Date of Patent: September 29, 2015Assignee: Airbus Operations (S.A.S.)Inventors: Juan Lopez, Jean-Bernard Itier
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Patent number: 9112761Abstract: A device that may include a router and may also include narrowband generators arranged to generate samples of narrowband channels, a digital up converter (DUC). The DUC may include multiple DUC inputs. Different DUC inputs are associated with different frequency ranges. The router may include multiple router inputs, multiple router outputs and a routing circuit. The multiple router outputs are coupled to the multiple DUC inputs. The multiple router inputs are coupled to the narrowband generators. The routing circuit may include a re-sequencing memory module that is arranged to receive the samples of narrowband channels from the narrowband generator according to an input order and to output the samples of the narrowband channels to the multiple router outputs according to an output order that is responsive to an allocation of frequencies to the samples of the narrowband channels.Type: GrantFiled: February 13, 2014Date of Patent: August 18, 2015Assignee: Harmonic, Inc.Inventors: Ariel Zaltsman, Adi Bonen
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Patent number: 9106387Abstract: A method for communication includes configuring a multi-level fat-tree network to include at least three levels of switches, including multiple modules arranged externally in a tree topology. Each module contains a respective group of the switches arranged in an internal tree extending over at least two of the levels of the network. A subset of the modules is selected to be active in carrying the communication traffic. The network is operated so as to convey communication traffic among the switches via the active modules, while the modules that are not in the selected subset remain inactive.Type: GrantFiled: September 22, 2013Date of Patent: August 11, 2015Assignee: MELLANOX TECHNOLOGIES LTD.Inventors: Dror Goldenberg, Eitan Zahavi, Ori Rottenstreich