公开(公告)号：US09166723B2

公开(公告)日：2015-10-20

申请号：US14177654

申请日：2014-02-11

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji

IPC: H04J14/00 ,  H04J14/02 ,  H04L12/721

CPC classification number: H04J14/021 ,  H04J14/0224 ,  H04J14/0257 ,  H04L45/12

Abstract: A method implemented in a network apparatus used in a wavelength division multiplexing (WDM) optical network is disclosed. The method includes (a) finding K-shortest routes between each node pair (s, d), where s, dεV and |V|≦K, where V is a set of reconfigurable optical add-drop multiplexer (ROADM) nodes, (b) selecting unconsidered node pair (s, d), (c) selecting unconsidered route k between nodes s and d out of the K-shortest routes, (d) finding a bit map of route k by performing bit-wise logical AND operation on bit vectors of fibers along route k, (e) selecting unconsidered line rate l out of offered set L of line rates, and (f) finding a probability αls,d,k of provisioning a connection with line rate l. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在波分多路复用（WDM）光网络中使用的网络装置中实现的方法。 该方法包括：（a）找到每个节点对（s，d）之间的K个最短路径，其中s，d＆egr; V和| V |和nlE; K，其中V是可重配置光分插复用器（ROADM） 节点，（b）选择未考虑的节点对（s，d），（c）从K个最短路由中的节点s和d之间选择未被考虑的路由k，（d）通过逐位执行寻找路由k的位图 沿着路线k对光纤的位向量进行逻辑与运算，（e）从所提供的线路速率集合L中选择未考虑的线路速率l，以及（f）找到用线路速率l提供连接的概率αls，d，k。 还公开了其他装置，系统和方法。

公开(公告)号：US09161107B2

公开(公告)日：2015-10-13

申请号：US14166350

申请日：2014-01-28

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: H04J14/00 ,  H04Q11/00 ,  H04L27/26 ,  H04J14/02 ,  H04L12/931

CPC classification number: H04Q11/0066 ,  H04J14/0267 ,  H04L5/0008 ,  H04L5/0023 ,  H04L5/0028 ,  H04L27/2601 ,  H04L27/2697 ,  H04L49/356 ,  H04Q11/0005 ,  H04Q2011/0032 ,  H04Q2213/13291

Abstract: A communication system enabling a switching procedure for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO OFDM) based flexible rate intra-data center network DCN, includes a MIMO OFDM DCN with optical burst switching OBS capability, an optical burst switching OBS procedure for influencing the MIMO OFDM DCN, and a centralized control configuration coupled to the MIMO OFDM DCN and enabling a software defined network SDN configuration in the communication system.

Abstract translation: 一种能够实现基于多输入多输出正交频分复用（MIMO OFDM）的灵活率数据中心网络DCN的切换过程的通信系统包括具有光突发交换OBS能力的MIMO OFDM DCN，光突发交换OBS 影响MIMO OFDM DCN的过程，以及耦合到MIMO OFDM DCN的集中式控制配置，并且在通信系统中实现软件定义的网络SDN配置。

公开(公告)号：US09094148B2

公开(公告)日：2015-07-28

申请号：US14271539

申请日：2014-05-07

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Junqiang Hu ,  Ting Wang

IPC: H04J14/02 ,  H04B10/079 ,  H04B10/296

CPC classification number: H04J14/0221 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/0797 ,  H04B10/296

Abstract: An optical amplifier that uses software-defined optical networking (SDON) technology, with a centralized controller and flexible physical hardware (the adaptive amplifier here) to optimize the power distribution among different WDM channels in the amplifier. It considers the detailed information for each channel through the information from centralized controller. It is suitable for both single line rate and mixed line rate system, and is suitable for a wavelength division multiplexing WDM system with the same signal type or different signal types.

Abstract translation: 一种使用软件定义光网络（SDON）技术的光放大器，具有集中控制器和灵活的物理硬件（这里的自适应放大器），以优化放大器中不同WDM通道之间的功率分配。 它通过集中控制器的信息来考虑每个通道的详细信息。 适用于单线速率和混合线速系统，适用于具有相同信号类型或不同信号类型的波分复用WDM系统。

公开(公告)号：US20150104166A1

公开(公告)日：2015-04-16

申请号：US14510163

申请日：2014-10-09

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji

IPC: H04Q11/00 ,  H04L12/707 ,  H04J14/02

CPC classification number: H04Q11/0066 ,  H04J14/0257 ,  H04J14/0271 ,  H04J14/0289 ,  H04J14/0295 ,  H04J14/0297 ,  H04L45/128 ,  H04L45/22 ,  H04L45/62 ,  H04Q2011/0073 ,  H04Q2011/0081 ,  H04Q2011/0086

Abstract: We propose an efficient procedure, namely disjoint pair procedure based cloud service embedding procedure that first maps working and backup virtual nodes over physical nodes while balancing computational resources of different types, and finally, maps working and backup virtual links over physical routes while balancing network spectral resources using the disjoint pair procedure.

Abstract translation: 我们提出了一种有效的过程，即基于不相交过程的云服务嵌入过程，首先在物理节点上映射工作和备份虚拟节点，同时平衡不同类型的计算资源，最后通过物理路由映射工作和备份虚拟链路，同时平衡网络光谱 资源使用不相交对的程序。

公开(公告)号：US20140226986A1

公开(公告)日：2014-08-14

申请号：US14177654

申请日：2014-02-11

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji

IPC: H04J14/02 ,  H04L12/721

CPC classification number: H04J14/021 ,  H04J14/0224 ,  H04J14/0257 ,  H04L45/12

Abstract: A method implemented in a network apparatus used in a wavelength division multiplexing (WDM) optical network is disclosed. The method includes (a) finding K-shortest routes between each node pair (s, d), where s, d∈V and |V|≦K, where V is a set of reconfigurable optical add-drop multiplexer (ROADM) nodes, (b) selecting unconsidered node pair (s, d), (c) selecting unconsidered route k between nodes s and d out of the K-shortest routes, (d) finding a bit map of route k by performing bit-wise logical AND operation on bit vectors of fibers along route k, (e) selecting unconsidered line rate l out of offered set L of line rates, and (f) finding a probability αls,d,k of provisioning a connection with line rate l. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在波分多路复用（WDM）光网络中使用的网络装置中实现的方法。 该方法包括：（a）在每个节点对（s，d）之间找到K个最短路径，其中s，d∈V和| V |＆nlE; K，其中V是可重配置光分插复用器（ROADM） 节点，（b）选择未考虑的节点对（s，d），（c）从K个最短路由中的节点s和d之间选择未被考虑的路由k，（d）通过逐位执行寻找路由k的位图 沿着路线k对光纤的位向量进行逻辑与运算，（e）从所提供的线路速率集合L中选择未考虑的线路速率l，以及（f）找到用线路速率l提供连接的概率αls，d，k。 还公开了其他装置，系统和方法。

公开(公告)号：US20140147120A1

公开(公告)日：2014-05-29

申请号：US14085000

申请日：2013-11-20

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar N. Patel ,  Philip Nan Ji ,  Ting Wang

IPC: H04J14/02

CPC classification number: H04J14/0238 ,  H04J14/0257 ,  H04J14/0267 ,  H04L45/16

Abstract: The present invention is directed to a solution for grooming multicast traffic in flexible optical wavelength division multiplexing WDM networks. The invention includes a solution for grooming multicast traffic in flexible optical wavelength division multiplexing networks into a solving a multicast routing sub-problem, solving a a grooming sub-problem; and solving a wavelength assignment and spectrum allocation sub-problem.

Abstract translation: 本发明涉及一种用于在柔性光波分复用WDM网络中整理组播业务的解决方案。 本发明包括将柔性光波分复用网络中的组播流量整理为解决组播路由子问题，解决梳理子问题的解决方案; 并解决波长分配和频谱分配子问题。

公开(公告)号：US10763964B2

公开(公告)日：2020-09-01

申请号：US16454054

申请日：2019-06-27

Applicant: NEC Laboratories America, Inc.

Inventor： Yue-Kai Huang ,  Ezra Ip ,  Philip Nan Ji ,  Ming-Fang Huang

IPC: H04B10/00 ,  H04B10/2543 ,  H04B10/25 ,  H04J14/00

Abstract: Aspects of the present disclosure describe systems, methods and structures providing bidirectional optical fiber communication and sensing using the same fiber transmission band and bidirectional WDM fiber sharing such that communications channels and optical fiber sensing channel(s) coexist on the same fiber. As a result, nonlinear interaction between communications channels and interrogating pulse(s) of sensing are much reduced or eliminated.

公开(公告)号：US10345138B2

公开(公告)日：2019-07-09

申请号：US15385972

申请日：2016-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione ,  Philip Nan Ji ,  Ezra Ip ,  Ting Wang

IPC: G01H9/00

Abstract: A system to perform distributed acoustic sensing (DAS) in an environment with acoustic vibrations present includes at least an optical fiber positioned in said environment, wherein the optical fiber comprises N spatial channels and N laser pulses are launched into the N spatial channels of the optical fiber and propagate over a fiber length; and one or more sensors to measure N signals of acoustic vibration amplitude and frequency from each of N spatial channels, wherein the N signals are digitally added for spatial averaging and applied to determine DAS.

公开(公告)号：US10162245B2

公开(公告)日：2018-12-25

申请号：US15596043

申请日：2017-05-16

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: G02F1/335 ,  G01D5/353 ,  G02F1/125

Abstract: A sensing system adapted to receive backscattered signal from a sensing fiber includes a first Faraday rotator mirror; a second Faraday rotator mirror; an optical hybrid coupled to the Faraday rotator mirrors, wherein one of the mirrors is coupled with an optical path difference; a 3-port optical circulator coupled to the sensing fiber and the optical hybrid; a first photodetector coupled to the circulator; and three photodetectors coupled to the optical hybrid.

公开(公告)号：US09866346B2

公开(公告)日：2018-01-09

申请号：US15279399

申请日：2016-09-28

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Ryuji Aida

IPC: H04J14/02 ,  H04Q11/00

CPC classification number: H04J14/0212 ,  H04J14/0201 ,  H04J14/021 ,  H04J14/0297 ,  H04Q11/0005 ,  H04Q2011/0015 ,  H04Q2011/0058

Abstract: Aspects of the present disclosure describe systems, structures and methods providing fully reconfigurable optical add-drop multiplexing (ROADM) that provide redundancy protection against any two (2) simultaneous wavelength selective switch (WSS) failures with only four 2×1 WSS structures for both Eastbound and Westbound traffic, while not requiring bidirectional operation of the WSS structures.