公开(公告)号：US20180262292A1

公开(公告)日：2018-09-13

申请号：US15457520

申请日：2017-03-13

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Vijayanand Vusirikala ,  Matthew Newland

IPC: H04J14/02 ,  H04Q11/00

CPC classification number: H04J14/0212 ,  H04B10/2916 ,  H04B10/2941 ,  H04J14/021 ,  H04J14/0221 ,  H04Q11/0005 ,  H04Q2011/0016

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.

公开(公告)号：US09998806B2

公开(公告)日：2018-06-12

申请号：US15348430

申请日：2016-11-10

Applicant: Google Inc.

Inventor： Valey Kamalov ,  Vijayanand Vusirikala ,  Vinayak Dangui

IPC: H04B10/00 ,  H04Q11/00 ,  H04B10/2513 ,  H04B10/2569

CPC classification number: H04Q11/0062 ,  H04B10/2513 ,  H04B10/2569 ,  H04B10/2912 ,  H04B2210/258 ,  H04Q11/0005 ,  H04Q2011/0088

Abstract: A method for overlapping spectrum amplification includes receiving an optical signal and splitting the optical signal into a first split signal having a first wavelength band and a second split signal having a second wavelength band. The splitting results in a band gap between the first wavelength band and the second wavelength band. The method further includes delaying the first split signal by a threshold period of time relative to the second split signal and combining the first split signal and the second split signal, resulting in a combined signal having the first wavelength band and the second wavelength band without the band gap therebetween. The path difference between the first split signal along the first signal path and the second split signal along the second signal path is within a threshold multipath interference compensation range.

公开(公告)号：US20170012856A1

公开(公告)日：2017-01-12

申请号：US14922905

申请日：2015-10-26

Applicant: Google Inc.

Inventor： Xiaoxue Zhao ,  Emilie Jeanne Anne Danna ,  Christoph Albrecht ,  Bikash Koley ,  Satyajeet Singh Ahuja ,  Vinayak Dangui

IPC: H04L12/721

CPC classification number: H04L45/12 ,  G06F17/509 ,  G06F2217/10 ,  G06F2217/72 ,  H04L41/14 ,  H04L41/145 ,  H04W16/18

Abstract: The present disclosure describes system and methods for network planning. The systems and methods can incorporate network traffic demands, availability requirements, latency, physical infrastructure and networking device capability, and detailed cost structures to calculate a network design with minimum or reduced cost compared to conventional methods. In some implementations, the method include providing an initial, deterministic set of failures, and then successively performing a network optimization and a network availability simulation to determine which failures most impact the performance of the network model. The high impact failures can then be provided back into the system, which generates an improved network design while still maintaining minimum cost.

Abstract translation: 本公开描述了用于网络规划的系统和方法。 与传统方法相比，系统和方法可以结合网络流量需求，可用性要求，延迟，物理基础设施和网络设备能力以及详细的成本结构来计算网络设计，成本最低或降低。 在一些实现中，该方法包括提供初始的确定性故障集合，然后连续执行网络优化和网络可用性模拟，以确定哪些故障最能影响网络模型的性能。 然后可以将高冲击故障返回到系统中，从而产生改进的网络设计，同时仍然保持最低成本。

公开(公告)号：US10218454B2

公开(公告)日：2019-02-26

申请号：US15457520

申请日：2017-03-13

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Vijayanand Vusirikala ,  Matthew Newland

IPC: H04B10/00 ,  H04J14/02 ,  H04Q11/00 ,  H04J14/00

Abstract: A reconfigurable optical add/drop multiplexer (ROADM) includes a plurality of interconnected ROADM blocks. Each ROADM block includes an ingress switchable-gain amplifier, an output power detector coupled to an output of the ingress switchable gain amplifier, and a wavelength-selective switch coupled to the output of the ingress switchable gain amplifier. Each ROADM block includes a plurality of add/drop blocks coupled to the wavelength-selective switches of the plurality of ROADM blocks. The ROADM includes a controller configured to receive an indication of an output signal power from the output power detector and adjust gain and equalization parameters of the ingress switchable-gain amplifier based on the received indication of the output signal power.

公开(公告)号：US20170033870A1

公开(公告)日：2017-02-02

申请号：US14813756

申请日：2015-07-30

Applicant: Google Inc.

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

IPC: H04B10/40

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.

Abstract translation: 本公开提供了用于提高通信系统的频谱效率的系统，方法和装置。 通信系统可以包括用于在发射机和接收机之间传送数据的发射机，接收机和通信链路。 发射机可以采用多载波技术将数据发射到接收机。 发射机可以使用接收机侧梳状发生器产生多个载波信号，其中一个被发送到发射机，作为通过光链路与已调制的载波信号组合的导频载波信号。 在接收机处，接收机侧梳发生器使用导频载波信号来产生多个接收机侧载波信号，用于检测已调载波信号。 由于调制载波信号中的相位噪声和接收机侧载波信号中的相位噪声具有相同的特性，所以在接收机处消除相位噪声，从而改善了检测。

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。

公开(公告)号：US20180132016A1

公开(公告)日：2018-05-10

申请号：US15348430

申请日：2016-11-10

Applicant: Google Inc.

Inventor： Valey Kamalov ,  Vijayanand Vusirikala ,  Vinayak Dangui

IPC: H04Q11/00 ,  H04B10/2513 ,  H04B10/2569

CPC classification number: H04Q11/0062 ,  H04B10/2513 ,  H04B10/2569 ,  H04B10/2912 ,  H04B2210/258 ,  H04Q11/0005 ,  H04Q2011/0088

Abstract: A method for overlapping spectrum amplification includes receiving an optical signal and splitting the optical signal into a first split signal having a first wavelength band and a second split signal having a second wavelength band. The splitting results in a band gap between the first wavelength band and the second wavelength band. The method further includes delaying the first split signal by a threshold period of time relative to the second split signal and combining the first split signal and the second split signal, resulting in a combined signal having the first wavelength band and the second wavelength band without the band gap therebetween. The path difference between the first split signal along the first signal path and the second split signal along the second signal path is within a threshold multipath interference compensation range.

公开(公告)号：US09722912B2

公开(公告)日：2017-08-01

申请号：US14922905

申请日：2015-10-26

Applicant: Google Inc.

Inventor： Xiaoxue Zhao ,  Emilie Jeanne Anne Danna ,  Christoph Albrecht ,  Bikash Koley ,  Satyajeet Singh Ahuja ,  Vinayak Dangui

IPC: H04L12/721 ,  G06F17/50 ,  H04L12/24 ,  H04W16/18

CPC classification number: H04L45/12 ,  G06F17/509 ,  G06F2217/10 ,  G06F2217/72 ,  H04L41/14 ,  H04L41/145 ,  H04W16/18

Abstract: The present disclosure describes system and methods for network planning. The systems and methods can incorporate network traffic demands, availability requirements, latency, physical infrastructure and networking device capability, and detailed cost structures to calculate a network design with minimum or reduced cost compared to conventional methods. In some implementations, the method include providing an initial, deterministic set of failures, and then successively performing a network optimization and a network availability simulation to determine which failures most impact the performance of the network model. The high impact failures can then be provided back into the system, which generates an improved network design while still maintaining minimum cost.

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.

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。