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    Overlapping spectrum in optical communication
    11.
    发明授权
    Overlapping spectrum in optical communication 有权
    光通信中的重叠光谱

    公开(公告)号：US09191141B2

    公开(公告)日：2015-11-17

    申请号：US14312981

    申请日：2014-06-24

    Applicant: Google Inc.

    Inventor： Valey Kamalov ,  Vijay Vusirikala ,  Bikash Koley ,  Vinayak Dangui

    IPC: H04J14/02

    CPC classification number: H04J14/0201 ,  H04J14/0202 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

    Abstract: An optical add-drop multiplexer including a first filter filtering a first band of wavelengths of a communication spectrum for a first communication segment and a second filter filtering a second band of wavelengths of the communication spectrum for a second communication segment. The second band of wavelengths overlaps the first band of wavelengths in an overlap band of wavelengths. The overlap band may have a variable size. The first band of wavelengths includes a first fraction of the overlap band of wavelengths for the first communication segment and the second band of wavelengths includes a remaining fraction the overlap band of wavelengths for the second communication segment.

    Abstract translation: 一种光分插复用器，包括滤波第一通信段的通信频谱的第一波长段的第一滤波器和滤波第二通信段的通信频谱的第二波长波段的第二滤波器。 第二波长波段在波长的重叠带中与第一波长波段重叠。 重叠带可以具有可变大小。 第一波长带包括用于第一通信段的波长的重叠带的第一分数，并且第二波长带包括用于第二通信段的波长的重叠带的剩余部分。

    Optoelectronic packet switch/routers
    12.
    发明授权
    Optoelectronic packet switch/routers 有权
    光电分组交换机/路由器

    公开(公告)号：US09167322B1

    公开(公告)日：2015-10-20

    申请号：US14301555

    申请日：2014-06-11

    Applicant: Google Inc.

    Inventor： Xiaoxue Zhao ,  Bikash Koley ,  Vijay Vusirikala ,  Edward Crabbe ,  Paul Phillip Germano ,  Hong Liu ,  Philip Michael Wells

    IPC: H04Q11/00 ,  H04B10/2575

    CPC classification number: H04Q11/0005 ,  H04B10/2575 ,  H04Q2011/0013 ,  H04Q2011/0032 ,  H04Q2011/0039 ,  H04Q2011/006

    Abstract: A packet switch/router including a first stage switch fabric receiving an electrical signal, a mid-stage buffer receiving and storing the electrical signal from the first stage switch fabric, and a second stage switch fabric receiving the electrical signal from the mid-stage buffer. Each switch fabric includes N layers of N×N arrayed waveguide gratings (AWGs), and each AWG has ingress ports and egress ports. A wavelength tunable device, such as a tunable laser, communicates with a source ingress port of an AWG and converts the received electrical signal to an optical signal having a wavelength selected for routing a packet from the source ingress port to a target egress port of the arrayed waveguide grating. A photoreceiver, such as a burst-mode photoreceiver, receives the propagated optical signal from the target egress port and converts the optical signal to the electrical signal.

    Abstract translation: 包括接收电信号的第一级交换结构的分组交换机/路由器，接收并存储来自第一级交换结构的电信号的中间缓冲器以及从中间级缓冲器接收电信号的第二级交换机结构 。 每个交换结构包括N层N×N阵列波导光栅（AWG），每个AWG具有入口端口和出口端口。 诸如可调激光器的波长可调设备与AWG的源入口端口进行通信，并将接收到的电信号转换为具有选择的波长的光信号，以将数据包从源入口端口路由到目标出口端口 阵列波导光栅。 诸如突发模式光接收器的光接收器从目标出口接收传播的光信号，并将光信号转换为电信号。

    TRANSPORT OF MULTIPLE ASYNCHRONOUS DATA STREAMS USING HIGHER ORDER MODULATION
    13.
    发明申请
    TRANSPORT OF MULTIPLE ASYNCHRONOUS DATA STREAMS USING HIGHER ORDER MODULATION 有权
    使用更高阶调制的多个非同步数据流的传输

    公开(公告)号：US20140219655A1

    公开(公告)日：2014-08-07

    申请号：US14250969

    申请日：2014-04-11

    Applicant: Google Inc.

    Inventor： Bikash Koley ,  Vijayanand Vusirikala ,  Hong Liu

    IPC: H04Q11/00 ,  H04J14/06

    CPC classification number: H04Q11/0005 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/5561 ,  H04J3/04 ,  H04J3/0602 ,  H04J3/0685 ,  H04J14/0279 ,  H04J14/0298 ,  H04J14/06 ,  H04L27/34 ,  H04L27/36 ,  H04Q2011/0045 ,  H04Q2213/13361

    Abstract: Aspects of the invention provide transmitters and receivers for managing multiple optical signals. High order modulation, such as phase and/or amplitude modulation, is used to achieve multiple bits per symbol by transporting multiple asynchronous data streams in an optical transport system. One or more supplemental multiplexing techniques such as time division multiplexing, polarization multiplexing and sub-carrier multiplexing may be used in conjunction with the high order modulation processing. This may be done in various combinations to realize a highly spectrally efficient multi-data stream transport mechanism. The system receives a number of asynchronous signals which are unframed and synchronized, and then reframed and tagged prior to the high order modulation. Differential encoding may also be performed. Upon reception of the multiplexed optical signal, the receiver circuitry may employ either direct detection without a local oscillator or coherent detection with a local oscillator.

    Abstract translation: 本发明的各方面提供用于管理多个光信号的发射机和接收机。 高阶调制（例如相位和/或幅度调制）用于通过在光学传输系统中传送多个异步数据流来实现每个符号的多个位。 可以结合高阶调制处理使用一个或多个补充复用技术，例如时分复用，偏振复用和副载波复用。 这可以以各种组合来实现，以实现高频谱效率的多数据流传输机制。 系统接收多个异步信号，这些异步信号是非帧和同步的，然后在高阶调制之前被重构和标记。 也可以执行差分编码。 在接收到复用的光信号时，接收机电路可以采用无本地振荡器的直接检测或与本地振荡器的相干检测。

    Systems for improved spectral efficiency in multi-carrier communication systems
    17.
    发明授权
    Systems for improved spectral efficiency in multi-carrier communication systems 有权

    公开(公告)号：US09705599B2

    公开(公告)日：2017-07-11

    申请号：US14813756

    申请日：2015-07-30

    Applicant: Google Inc.

    Inventor： Vinayak Dangui ,  Bikash Koley ,  Vijay Vusirikala ,  Ralph Theodore Hofmeister

    IPC: H04B10/00 ,  H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02

    CPC classification number: H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02 ,  H04J14/0279

    Abstract: This disclosure provides systems, methods, and apparatus for improving spectral efficiency of a communication system. The communication system can include a transmitter, a receiver and a communication link for communicating data between the transmitter and the receiver. The transmitter can employ a multi-carrier technique to transmit data to the receiver. The transmitter can generate a plurality of carrier signals using a receiver-side comb generator, one of which is sent to the transmitter as a pilot carrier signal combined with modulated carrier signals over an optical link. At the receiver the receiver-side comb generator uses the pilot carrier signal to generate a plurality of receiver-side carrier signals, which are used for detecting the modulated carrier signals. As the phase noise in the modulated carrier signals and the phase noise in the receiver-side carrier signals have the same characteristics, the phase noise is cancelled at the receiver, resulting in improved detection.

    SYSTEMS AND METHODS FOR INFERRING NETWORK TOPOLOGY AND PATH METRICS IN WIDE AREA NETWORKS
    18.
    发明申请
    SYSTEMS AND METHODS FOR INFERRING NETWORK TOPOLOGY AND PATH METRICS IN WIDE AREA NETWORKS 有权
    网络拓扑学和广域网络中的路径度量的系统和方法

    公开(公告)号：US20160380892A1

    公开(公告)日：2016-12-29

    申请号：US14753883

    申请日：2015-06-29

    Applicant: Google Inc.

    Inventor： Priya Mahadevan ,  Bikash Koley ,  Anees Shaikh

    IPC: H04L12/721 ,  H04L12/751

    CPC classification number: H04L45/70 ,  H04L41/12 ,  H04L41/145 ,  H04L43/08 ,  H04L45/02 ,  H04L45/42

    Abstract: Described are methods and system for network analysis. A network analyzer for a first network is configured to receive network assessment information from a network metric monitors situated in third-party networks, the network assessment information indicating values for characteristics of one or more network paths from the respective network metric monitor to a node in a second network. The network analyzer aggregates the received network assessment information and identifies, from the aggregated network assessment information, a route from the first network to the node in the second network. The identified route is then selected from among a plurality of potential routes from the first network to the node in the second network and used in setting a routing policy for data flows from the first network through the node in the second network.

    Abstract translation: 描述网络分析的方法和系统。 用于第一网络的网络分析器被配置为从位于第三方网络中的网络度量监视器接收网络评估信息，所述网络评估信息指示从相应的网络度量监视器到一个节点的一个或多个网络路径的特性的值 第二个网络。 网络分析仪聚合接收到的网络评估信息，并从聚合网络评估信息中识别从第一网络到第二网络中的节点的路由。 然后从多个从第一网络到第二网络中的节点的潜在路由中选择所识别的路由，并且用于为从第一网络到第二网络中的节点的数据流设置路由策略。

    Overlapping Spectrum In Optical Communication
    19.
    发明申请
    Overlapping Spectrum In Optical Communication 有权
    光通信中的重叠光谱

    公开(公告)号：US20150200742A1

    公开(公告)日：2015-07-16

    申请号：US14312981

    申请日：2014-06-24

    Applicant: Google Inc.

    Inventor： Valey Kamalov ,  Vijay Vusirikala ,  Bikash Koley ,  Vinayak Dangui

    IPC: H04J14/02

    CPC classification number: H04J14/0201 ,  H04J14/0202 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213

    Abstract: An optical add-drop multiplexer including a first filter filtering a first band of wavelengths of a communication spectrum for a first communication segment and a second filter filtering a second band of wavelengths of the communication spectrum for a second communication segment. The second band of wavelengths overlaps the first band of wavelengths in an overlap band of wavelengths. The overlap band may have a variable size. The first band of wavelengths includes a first fraction of the overlap band of wavelengths for the first communication segment and the second band of wavelengths includes a remaining fraction the overlap band of wavelengths for the second communication segment.

    Abstract translation: 一种光分插复用器，包括滤波第一通信段的通信频谱的第一波长段的第一滤波器和滤波第二通信段的通信频谱的第二波长波段的第二滤波器。 第二波长波段在波长的重叠带中与第一波长波段重叠。 重叠带可以具有可变大小。 第一波长带包括用于第一通信段的波长的重叠带的第一分数，并且第二波长带包括用于第二通信段的波长的重叠带的剩余部分。

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