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公开(公告)号：US09967052B2
公开(公告)日：2018-05-08
申请号：US15248890
申请日：2016-08-26
IPC分类号： H04J14/02 , H04B10/272
CPC分类号： H04J14/0227 , H04B10/272 , H04J14/021 , H04J14/0257
摘要： A network controller in a control plane and a method for selecting a connection for a wavelength channel from a plurality of connection candidates in a communications network. The network controller comprises a modeling module and a routing engine. The modeling module obtains information from a physical element in the network, related to an estimated time for the element to establish each connection candidate therethrough for the wavelength channel. The routing engine selects the connection taking into account the estimated time associated with each connection candidate.
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公开(公告)号：US20180062782A1
公开(公告)日：2018-03-01
申请号：US15249784
申请日：2016-08-29
CPC分类号： H04J14/0201 , H04B10/2504 , H04B10/2507 , H04J14/0221
摘要： Aspects of the disclosure provide systems and methods which avoid the negative effects of Spectral Hole Burning when spectral changes are made for an optical communication system (OCS). Embodiments of the disclosure are directed to methods and systems which preform spectral holes for the range of wavelength channels expected to be used in the OCS. Embodiments include a configurable idle tone source for providing power to each of a set of idle tone wavelengths distributed across the spectral band used in the optical communication system. The configurable idle tone source is communicatively coupled to an output fiber of an optical network element and controlled such that optical power is present in the output optical fiber at each one of the set of idle tone wavelengths.
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公开(公告)号：US20170176688A1
公开(公告)日：2017-06-22
申请号：US14972501
申请日：2015-12-17
申请人： Hamid Mehrvar
发明人： Hamid Mehrvar
CPC分类号： G02B6/3542 , H04Q11/0005 , H04Q2011/0043 , H04Q2011/005 , H04Q2011/0056
摘要： A non-blocking N×N photonic switch may be augmented with additional inputs and outputs to make use of the excess switch capacity. An augmented photonic switch comprises an N×N non-blocking switching core connected between 2N inputs and 2N outputs.
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公开(公告)号：US20170134089A1
公开(公告)日：2017-05-11
申请号：US15204612
申请日：2016-07-07
IPC分类号： H04B10/079 , H04B10/27
CPC分类号： H04B10/07953 , H04B10/0793 , H04B10/27 , H04J14/0271
摘要： Routing of optical paths through an optical network may account for both linear and non-linear effects of the physical layer when determining the route. The non-linear effects may be determined only as necessary, allowing the non-linear effects to be included in the routing determination for larger optical networks.
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公开(公告)号：US20170094378A1
公开(公告)日：2017-03-30
申请号：US15180528
申请日：2016-06-13
申请人： Mohammad Kiaei , Hamid Mehrvar
发明人： Mohammad Kiaei , Hamid Mehrvar
CPC分类号： H04Q11/0003 , H04B10/70 , H04Q11/0005 , H04Q11/0062 , H04Q2011/0039 , H04Q2011/0045 , H04Q2011/005 , H04Q2011/0086
摘要： Method and apparatus are provided for controlling an interface to a switch, for example a photonic switch. The method comprises communicatively connecting a controller to a source node and to a destination node; receiving from the source node information indicating a status of at least one input queue at the source node; allocating, based on the information, the at least one input queue to at least one interface of the source node; and aligning frames at the destination node when multiple interfaces of the source node are used for transmission of one input queue. Transmission of one input queue is coordinated via multiple interfaces of the source node. An ingress/egress chip for providing an ingress/egress interface to a photonic switch is also provided.
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16.发明申请公开(公告)号：US20170055049A1
公开(公告)日：2017-02-23
申请号：US14828019
申请日：2015-08-17
申请人： Mohammad KIAEI , Hamid MEHRVAR
发明人： Mohammad KIAEI , Hamid MEHRVAR
IPC分类号： H04Q11/00 , H04L12/933
CPC分类号： H04Q11/0003 , H04L49/1523 , H04Q11/0005 , H04Q11/0062 , H04Q2011/0037
摘要： A method and apparatus for routing received connection demands through a photonic switch having multiple parallel instances of a switching plane is provided. Routing respects the constraint that each cell of the switch accommodates a maximum of one lightpath. Connection demands are routed one at a time via switching plane instances where it is possible without violating the constraint. When a demand cannot be routed, a re-arrangement step is performed. A previously routed demand that conflicts with the blocked demand is identified and de-allocated. The blocked demand is then routed in place of this de-allocated demand, which is now considered blocked. The process repeats until no blocked demands remain. Attempts to route additional demands of lower priority can also be made by checking whether each lower priority demand can be routed given the configuration of the switch to route existing demands.
摘要翻译： 提供了一种用于通过具有开关平面的多个平行实例的光子开关来路由所接收的连接需求的方法和装置。 路由方面遵循交换机的每个单元最多容纳一个光路的约束。 连接需求通过可能的切换平面实例一次一个路由，而不违反约束。 当需求不能路由时，执行重新排列步骤。 与被阻止的需求冲突的先前路由的需求被识别和解除分配。 阻塞的需求然后被路由替代现在被认为被阻止的这种去分配的需求。 该过程重复，直到没有阻止需求为止。 通过检查每个较低优先权要求是否可以通过交换机的配置路由现有需求，也可以尝试路由更低优先级的附加需求。
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公开(公告)号：US11038615B2
公开(公告)日：2021-06-15
申请号：US16383310
申请日：2019-04-12
申请人： Hamid Mehrvar , Christopher Janz
发明人： Hamid Mehrvar , Christopher Janz
摘要： A method of managing an optical communications network comprising a plurality of nodes interconnected by optical sections. The method comprises: identifying one or more pairs of adjacent DL-equipped nodes at which dummy light (DL) hardware is deployed, respective dummy light (DL) hardware being deployed at fewer than the plurality of the nodes of the optical communications network, the respective DL hardware deployed at a particular node configured to supply dummy light to each optical section extending from the particular node, and defining a respective single-section DL path between each identified pair of adjacent DL-equipped nodes; identifying one or more pairs of non-adjacent DL-equipped nodes at which DL hardware is deployed, and defining a respective multi-section DL path between each identified pair of non-adjacent DL-equipped nodes; and causing the deployed DL hardware to supply DL light to each of the single- and the multi-section DL paths.
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公开(公告)号：US20190238224A1
公开(公告)日：2019-08-01
申请号：US15883540
申请日：2018-01-30
IPC分类号： H04B10/079 , H04J14/02 , H04B10/071 , H04B10/80 , H04B10/299
摘要： A monitoring and calibration apparatus for an optical networking device such as ROADM is provided. Reflectors are integrated into the device, for example at the ends of optical interconnect cables. The reflectors reflect light in specific monitoring wavelengths and pass other wavelengths such as those used for communication. A light source emits monitoring light which is reflected by the reflector and measured by a detector to measure the integrity of optical paths. The optical paths can include optical cables and cable connectors. Path integrity between different modules of the device can therefore be monitored. Multiple reflectors, reflecting light in different wavelengths, can be placed in series along the same optical path and used to monitor multiple segments of the path. A wavelength selective switch (WSS) of the device can be used to route monitoring light to different optical paths. The WSS also operates to route communication signals in the device.
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公开(公告)号：US10341083B2
公开(公告)日：2019-07-02
申请号：US15607031
申请日：2017-05-26
申请人： Michael Mayer , Hamid Mehrvar
发明人： Michael Mayer , Hamid Mehrvar
IPC分类号： H04B10/40 , H04L7/00 , H04B10/2507 , H04J3/06
摘要： One aspect of the disclosure is directed to a system and method for determining the propagation delay for a signal to traverse an optical fiber between two transceivers. The method is performed by a first network element and includes transmitting a message to a second transceiver over a first optical fiber. The method further includes configuring both network elements such that the first NE receives a reply message from the second NE on the first optical fiber. This reply message includes an indication of the internal time for the second NE to transmit the reply message. Accordingly the one way propagation delay on the first optical fiber can be determined. Another aspect is directed to a system and method for using the determined one way propagation delay to synchronize clocks of the two NEs using a symmetric network synchronizing protocol such as precision timing protocol, and correcting for differences in the one way propagation delays which make up the round trip propagation delay. Some embodiments can do this without stopping the operation of the network while pausing (buffering) data flows while the one way propagation delays are determined.
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公开(公告)号：US20180007045A1
公开(公告)日：2018-01-04
申请号：US15198441
申请日：2016-06-30
IPC分类号： H04L29/06 , H04B10/516 , H04B10/66 , H04B10/27
CPC分类号： H04L63/0876 , H04B10/27 , H04B10/516 , H04B10/66 , H04L63/0428 , H04L63/061 , H04L63/068
摘要： Transmitter, receiver, system and method for secure data communications are provided. The transmitter encodes data as a spatial symbol in accordance with a codebook to transmit spatially encoded data through the optical channel. The receiver detects a spatial symbol from spatially encoded data received through the optical channel, and generates a data value based on a codebook and the spatial symbol.
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