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公开(公告)号：US11196483B2
公开(公告)日：2021-12-07
申请号：US16617871
申请日：2018-05-15
发明人： Antonio D'errico , Luca Giorgi , Marzio Puleri , Veronica Tinucci
IPC分类号： H04B10/079 , H04Q11/00
摘要： A method for monitoring a passive optical network, the passive optical network comprising a plurality of network components, comprises receiving an alert message (200) from a fault detection system associated with the passive optical network, the alert message comprising an indication of one or more candidate locations for a detected fault in the passive optical network. The method further comprises accessing an inventory (202) of the plurality of network components, the inventory storing, for each of the plurality of network components, information comprising the network component location. The method further comprises identifying (204), based on the one or more candidate locations and the network component locations, one or more network components of the plurality of network components as candidates for the cause of the detected fault.
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公开(公告)号：US10707962B2
公开(公告)日：2020-07-07
申请号：US15754456
申请日：2015-08-24
发明人： Gianmarco Bruno , Luca Giorgi , Jeroen Nijhof , Filippo Ponzini
IPC分类号： H04B10/07 , H04B10/2575 , H04B10/079 , H04B10/50
摘要： A radio over fibre system (5) comprises a base station (10, 20) with a first base station node (10) and a second base station node (20) connected by an optical communication link (30). At least one of the base station nodes (10, 20) comprises an optical transmitter (17, 23). A method of determining an operating parameter for the optical transmitter (17, 23) comprises receiving signal quality parameters for a plurality of user equipments (UE) served by the base station (10, 20). The method determines an operating parameter of the optical transmitter using the determined signal quality parameters of the plurality of user equipments (UE). The operating parameter of the optical transmitter can be a modulation parameter.
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公开(公告)号：US10687129B2
公开(公告)日：2020-06-16
申请号：US16096358
申请日：2016-04-25
发明人： Giulio Bottari , Antonio D'Errico , Luca Giorgi
摘要： A data center network node comprising at least one server connection for connecting to a server 6, a connection 7 for connecting the at least one server 6 to a first subnetwork. The first subnetwork is a conventional subnetwork which comprises at least one of a switch or a router. The node further comprises an optical receiver array 20 for connecting the node to an optical offload subnetwork, wherein the optical receiver array 20 comprises a plurality of optical receivers. The array is configured such that each receiver is connectable to an optical path within a multi-path optical connection. The node further comprises an optical transmitter array 23 for connecting the node to an optical offload subnetwork. The optical transmitter array comprises a plurality of optical transmitters. The array is configured such that each receiver is connectable to an optical path within a multi-path optical connection. The node further comprises an electrical switching arrangement 26 for directing an incoming data stream from a receiver in the receiver array 22 to at least one of the at least one server connection to server 6 or at least one transmitter in the transmitter array 23, and for directing an outgoing data stream from one of the at least one server 6 to at least one transmitter in the transmitter array 23. The electrical switching arrangement 26 provides for effective transport of data in a data center, e.g. transporting high bandwidth elephant flows on an optical offload network. The electrical switching arrangement 26 enables the provision of point to multipoint connections for data streams by enabling a data stream to be passed to multiple transmitters or received at a node, sent to a server in the node, and transmitted to a subsequent node in the network. Once high bandwidth flow demands have been identified, a schedule of logical links between the nodes of the network is constructed so as to enable the high bandwidth flows to be transmitted on the offload network. The development of the schedule is implemented by an orchestrator 29 and comprises constructing a booking list for high bandwidth flows, wherein a high bandwidth flow is a data stream which has a capacity requirement greater than a threshold.
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公开(公告)号：US20200044740A1
公开(公告)日：2020-02-06
申请号：US16338522
申请日：2016-10-03
IPC分类号： H04B10/2581 , H04Q11/00 , H04J14/02 , G02B6/02
摘要： A data center network node (28) comprises one or more switch (18,19,22,23) configured to link an optical transceiver (16,17) to an optical connection comprising a multi-core optical fiber (30) having a plurality of cores (31). For each core (31), the one or more switch (18,19,22,23) is configurable between a first configuration in which an optical signal on a said core (31) of the multi-core optical fiber bypasses the optical transceiver and a second configuration in which the optical transceiver is optically linked to the said core (31) of the multi-core optical fiber (30).
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5.发明申请公开(公告)号：US20180248625A1
公开(公告)日：2018-08-30
申请号：US15962687
申请日：2018-04-25
发明人： Francesco Testa , Antonio D'Errico , Ernesto Ciaramella , Luca Giorgi , Wei-Ping Huang , Marco Presi
IPC分类号： H04B10/2569 , H04B10/50
CPC分类号： H04B10/2569 , H04B10/50 , H04B10/503
摘要： An optical source comprises a first laser arranged to generate a first optical signal having a first state of polarization (SOP) and a first optical frequency; a second laser arranged to generate a second optical signal having a second SOP, substantially orthogonal to the first SOP, and having a second optical frequency, different from the first optical frequency by a preselected frequency difference; a polarisation beam coupler arranged to combine the first optical signal and the second optical signal into a composite optical signal comprising both the first optical signal and the second optical signal having said substantially orthogonal SOPs; and an output arranged to output the composite optical signal.
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公开(公告)号：US10009095B2
公开(公告)日：2018-06-26
申请号：US15127867
申请日：2014-03-24
发明人： Giulio Bottari , Luca Giorgi , Peter Öhlén , Björn Skubic
IPC分类号： H04J14/00 , H04J14/02 , H04B10/032 , H04L12/707 , H04Q11/00 , H04L12/24
CPC分类号： H04B10/032 , H04J14/0212 , H04J14/0295 , H04L41/0668 , H04L45/22 , H04Q11/0066 , H04Q2011/0016 , H04Q2011/0081
摘要： An optical communications network has an interconnecting node (100) coupled in between at least one hub node (130) and at least first (140) and second (150) access nodes, to provide working and protection optical paths. The interconnecting node has a working wavelength selective switch (110) to select which working wavelengths are coupled. A corresponding protection wavelength selective switch (120) is also provided for the protection wavelengths. In the event of detection of a fault, protection switching (230) is carried out at the access node and the hub node without altering the selections made by the wavelength selective switches in the interconnecting node. Thus protection schemes across the interconnecting node for more than one access node can be handled. By not needing to alter wavelength selections at the interconnecting node during protection switching operation, the complexity and thus costs can be reduced.
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公开(公告)号：US12047208B2
公开(公告)日：2024-07-23
申请号：US17923981
申请日：2020-05-12
发明人： Ramon Gutierrez Castrejon , Saber Md Ghulam , David V. Plant , Robert Brunner , Luca Giorgi , Tommaso Catuogno
IPC分类号： H04L25/49 , H04B10/54 , H04B10/2513
CPC分类号： H04L25/4917 , H04B10/541 , H04B10/2513
摘要： Methods in an optical receiver, for decoding a received M-level pulse-amplitude-modulated, PAM-M, optical signal. An example method comprises, for a first interval, decoding (510) the received PAM-M optical signal using a standard PAM-M decoder with M-1 thresholds, using first sampling times, to obtain a first set of decoded bits, and decoding (520) the received PAM-M optical signal using a duobinary decoder with 2M-2 thresholds, at second sampling times offset from the first sampling times, to obtain second set of decoded bits. The method further comprises calculating (530) first and second error metrics corresponding to the first and second sets of decoded bits, respectively, and selecting (540) the standard PAM-M decoder or the duobinary decoder for subsequent decoding of the received PAM-M optical signal, based on the first and second error metrics.
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公开(公告)号：US11956015B2
公开(公告)日：2024-04-09
申请号：US17276720
申请日：2018-09-18
发明人： Giulio Bottari , Luca Giorgi , Filippo Ponzini
IPC分类号： H04B10/2575 , H04B10/29 , H04B10/61 , H04B10/69
CPC分类号： H04B10/2575 , H04B10/29 , H04B10/614 , H04B10/6166 , H04B10/69
摘要： A communication signal multiplexing apparatus includes first and second optical receivers, with the second optical receiver configured to receive an optical analog radio signal and to convert it into a corresponding electrical analog radio signal having a carrier frequency and the first optical receiver configured to receive an optical digital communication signal and to convert it into a corresponding electrical digital communication signal having a frequency spectrum. Further, a first electrical filter apparatus is configured to receive the electrical digital communication signal, and comprises a low-pass filter having a cut-off frequency lower than the carrier frequency of the electrical analog radio signal, and applies the low-pass filter to the electrical digital communication signal. The apparatus also includes a signal combining apparatus configured to combine the low-pass filtered electrical digital communication signal with the electrical analog radio signal to form a combined electrical signal and an optical transmitter configured to generate an optical communication signal carrying a representation of the combined electrical communication signal.
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公开(公告)号：US11764872B2
公开(公告)日：2023-09-19
申请号：US17277823
申请日：2018-09-21
发明人： Fabio Cavaliere , Luca Giorgi , Luca Poti , Gabriele De Angelis
IPC分类号： H04B10/2513 , G02B6/293
CPC分类号： H04B10/25133 , G02B6/29394 , G02B6/29343 , G02B6/29395
摘要： An Optical Dispersion Compensator (ODC) is disclosed, the ODC being suitable for managing chromatic dispersion of an optical signal for transmission over an optical fiber. The ODC comprises a first ODC unit (202) arranged on a first optical bus (206), a second ODC unit (204) arranged on a second optical bus (208), parallel to the first optical bus (206), and a switching element (210) interconnecting the first and second optical buses (206, 208) between the first and second ODC units (202, 204). The first and second ODC units (202, 204) are operable to provide a delay to the optical signal that varies with frequency. The switching element (210) is configured, in a first state, to switch an optical signal received on one of the first or second optical buses (206, 208) to the other of the first or second optical buses (208, 206) and, in a second state, to maintain an optical signal received on one of the first or second optical buses (206, 208) on the optical bus on which it was received (206, 208). Reflective elements (710) may be included in the ODC, providing bidirectional propagation through one of more ODC units.
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10.发明公开公开(公告)号：US20230171135A1
公开(公告)日：2023-06-01
申请号：US17923981
申请日：2020-05-12
发明人： Ramon Gutierrez Castrejon , Saber Md Ghulam , David V. Plant , Robert Brunner , Luca Giorgi , Tommaso Catuogno
CPC分类号： H04L25/4917 , H04B10/541 , H04B10/2513
摘要： Methods in an optical receiver, for decoding a received M-level pulse-amplitude-modulated, PAM-M, optical signal. An example method comprises, for a first interval, decoding (510) the received PAM-M optical signal using a standard PAM-M decoder with M-1 thresholds, using first sampling times, to obtain a first set of decoded bits, and decoding (520) the received PAM-M optical signal using a duobinary decoder with 2M-2 thresholds, at second sampling times offset from the first sampling times, to obtain second set of decoded bits. The method further comprises calculating (530) first and second error metrics corresponding to the first and second sets of decoded bits, respectively, and selecting (540) the standard PAM-M decoder or the duobinary decoder for subsequent decoding of the received PAM-M optical signal, based on the first and second error metrics.
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