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公开(公告)号：US20220038181A1
公开(公告)日：2022-02-03
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 , H04B10/61
摘要： Communication signal multiplexing apparatus (100) comprising: a first optical receiver (102) configured to receive an optical analog radio signal and to convert it into a corresponding electrical analog radio signal having a carrier frequency; a second optical receiver (104) configured to receive an optical digital communication signal and to convert it into a corresponding electrical digital communication signal having a frequency spectrum; first electrical filter apparatus (106) configured to receive the electrical digital communication signal, comprising a low-pass filter having a cut-off frequency lower than the carrier frequency of the electrical analog radio signal, and configured to apply the low-pass filter to the electrical digital communication signal; signal combining apparatus (108) 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 (110) 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：US20210124758A1
公开(公告)日：2021-04-29
申请号：US16605924
申请日：2017-04-26
发明人： Giulio Bottari , Stefano Ruffini
摘要： A method of data replication between a first data center and a second data center, wherein the first data center has a data set to be replicated, the method comprising: determining (501) whether a first path from the first data center to the second data center is suitable for the data set to be replicated, by: transmitting (502) from the first data center to the test data along the first path, taking (503) latency measurements for the test data along the first path; and determining a latency parameter of the first path using the latency measurements; and determining (504) if the latency parameter of the test data is less than a maximum latency threshold. If the latency parameter is less than the maximum latency threshold, the method performs (505) replication of the data set using the first path.
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公开(公告)号：US10790906B2
公开(公告)日：2020-09-29
申请号：US16338522
申请日：2016-10-03
IPC分类号： H04B10/2581 , G02B6/02 , H04J14/02 , H04Q11/00 , H04Q3/00 , H04B10/50 , H04B10/60 , H04B10/40
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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公开(公告)号：US10567290B2
公开(公告)日：2020-02-18
申请号：US16074178
申请日：2016-04-07
发明人： Fabio Cavaliere , Giulio Bottari , Stefano Stracca
IPC分类号： H04L12/26 , H04L12/801 , H04L12/721 , H04L12/851 , H04L12/841 , H04L12/947
摘要： A method for managing traffic of a plurality of packets in a plurality of packet flows transmitted using a time-slotted interface. The packet flows traverse a plurality of switches of a transport network according to an assigned path from a source node to a destination node. The method comprises determining (202) an end-to-end latency of a plurality of packets traversing a current switch in packet flows and assigning (204) priority to packets to the packets traversing the current switch, wherein a priority value of a packet depends on the determined end-to-end latency of said packets. The method further comprises allocating (206) a time slot in an output interface of the current switch to the packet having the highest priority value among the packets competing for said time slot.
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公开(公告)号：US20180124730A1
公开(公告)日：2018-05-03
申请号：US15561259
申请日：2015-04-01
发明人： Stefano Ruffini , Giulio Bottari
IPC分类号： H04W56/00 , H04L12/875 , H04W72/12 , H04L12/841 , H04L12/823 , H04L12/869
CPC分类号： H04W56/0045 , H04L47/28 , H04L47/283 , H04L47/32 , H04L47/50 , H04L47/56 , H04L47/60 , H04W72/1242
摘要： A network node (15) is configured to switch data packets between a Remote Radio Unit (2) and a Digital Unit (4). The network node comprises one or more input port (33) configured to receive said data packets (52a) and receive further packets having a destination other than one of a Remote Radio Unit and a Digital Unit. One or more output port (35) is configured to transmit said data packets and said further packets. A scheduler (31) is configured to control transmission from the output port according to a scheduling cycle (41a). The scheduler is configured to schedule only said data packets to be transmitted in a first period of the scheduling cycle, and schedule one or more of said further packets to be transmitted in a separate second period of the scheduling cycle.
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公开(公告)号：US20170222743A1
公开(公告)日：2017-08-03
申请号：US15492597
申请日：2017-04-20
发明人： Stefano Ruffini , Giulio Bottari , Manuel Nardelli
IPC分类号： H04J3/06
CPC分类号： H04J3/0658 , H04J3/0641 , H04J3/0682
摘要： Configuring a node (410, A-I, L-O) of a synchronization network, involves determining information about synchronization sources of a plurality of synchronization trails for passing synchronization information from the synchronization source (A, L, O, PRC) to the node to provide a synchronization reference. After determining automatically (210, 230, 330, 335, 340) synchonization transmission characteristics of trails (EF, FG, GH, HM, MN, OF, FI, IH) which use packet-based communication, the trails are compared automatically (240, 370), using their source information and their synchronization transmission characteristics, for selecting which of these trails to use for providing the synchronization reference for the node (N). Compared to selections made based on source alone, using the synchronization transmission characteristics of the packet based parts can enable a better choice of trail, and can enable comparison with synchronous type trails, and so enable hybrid synchronization networks to be configured and maintained.
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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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8.发明授权公开(公告)号：US11368215B2
公开(公告)日：2022-06-21
申请号：US16768785
申请日：2017-12-13
发明人： Fabio Cavaliere , Giulio Bottari , Stefano Ruffini
IPC分类号： H04B10/077 , H04B10/2513
摘要： An optical link for a communication network, the optical link having an optical fibre link, a downstream transmitter, a downstream receiver, an upstream transmitter and an upstream receiver. The upstream and downstream transmitters are configured to transmit a respective pilot tone on a respective optical carrier and are configured to tune a frequency of the pilot tone within a preselected frequency range. The upstream and downstream receivers are configured respectively to determine an upstream notch frequency, fnotch-US, and a downstream notch frequency, fnotch-DS, of respective detected photocurrents from at least one respective pilot tone frequency at which the respective detected photocurrent is equal to or lower than a photocurrent threshold. The optical link also includes processing circuitry configured to receive the upstream and downstream notch frequencies and configured to estimate a propagation delay difference of the optical link depending on the upstream and downstream notch frequencies.
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公开(公告)号：US11314772B2
公开(公告)日：2022-04-26
申请号：US16605924
申请日：2017-04-26
发明人： Giulio Bottari , Stefano Ruffini
摘要： A method of data replication between a first data center and a second data center, wherein the first data center has a data set to be replicated, the method comprising: determining (501) whether a first path from the first data center to the second data center is suitable for the data set to be replicated, by: transmitting (502) test data along the first path, taking (503) latency measurements for the test data along the first path; and determining a latency parameter of the first path using the latency measurements; and determining (504) if the latency parameter of the test data is less than a maximum latency threshold. If the latency parameter is less than the maximum latency threshold, the method performs (505) replication of the data set using the first path.
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10.发明申请公开(公告)号：US20210175977A1
公开(公告)日：2021-06-10
申请号：US17048300
申请日：2018-04-19
摘要： A path computation engine, PCE, (100) for an optical communications network comprising a plurality of nodes and a plurality of links. The PCE comprises a processor and memory comprising instructions executable by the processor whereby the PCE is operative to: receive a request to configure a quantum key, Qkey, path from a first node to a second node in the optical communications network for a quantum key distribution, QKD, signal for a quantum key for a secure data transmission signal; calculate a feasible Qkey path from the first node to the second node that is logically different to a traffic path from the first node to the second node for the secure data transmission signal, wherein the Qkey path is feasible if an optical signal power originating from the secure data transmission signal within the Qkey path, caused by optical interference of the secure data transmission signal with the QKD signal, is below a predetermined threshold value; and generate a control signal comprising instructions arranged to configure said feasible Qkey path.
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