公开(公告)号：US09735863B2

公开(公告)日：2017-08-15

申请号：US14504423

申请日：2014-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Ming Zhu

IPC: H04B10/00 ,  H04B7/26 ,  H04W56/00

CPC classification number: H04B7/2665 ,  H04W56/001

Abstract: A communication system includes an OFDMA transmitter (Tx) at an optical line terminal (OLT) generating an OFDMA signal by assigning orthogonal subcarriers to different cell sites through digital logic, an electrical multiplexer combining the electrical OFDMA signal with two electrical clock signals, and an optical intensity modulator intensity-modulating the resulting joint electrical OFDMA+clocks signal; an optical multiplexer receiving aggregate OFDMA signals on multiple wavelengths with tight DWDM λ-spacing; a remote node (RN) receiving the OFDMA signals, such that each wavelength is distributed by a de-multiplexer (Demux) to designated general small cell area, to which cell sites are connected by optical splitters; and an optical network unit (ONU) to directly photodetect and digitize received OFDMA signal, wherein downstream (DS) information for each cell is digitally extracted and prepared for wireless radio frequency (RF) transmission over an air interface, and an electrical splitter and bandpass filters to separate the OFDMA and clock signals for DSP-free clock recovery.

公开(公告)号：US09420359B2

公开(公告)日：2016-08-16

申请号：US14184787

申请日：2014-02-20

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Philip Nan Ji ,  Ting Wang ,  Akihiro Tanaka

IPC: H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0067 ,  H04J14/0224 ,  H04J14/0267 ,  H04Q2011/0086

Abstract: A network apparatus used in an optical network is disclosed. The network apparatus includes one or more first tunable and temperature controlled (TTC) lasers, one or more transmitters each of which is connected to one of said one or more TTC lasers, one or more second TTC lasers, one or more digital signal processing (DSP) transponders (TPNDs) each of which is connected to one of said one or more second TTC lasers, one or more receivers, and a controller to control said one or more transmitters and said one or more DSP TPNDs, wherein said one or more transmitters defragment an optical access spectrum, and said one or more DSP TPNDs exploit a newly available spectrum. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在光网络中使用的网络设备。 网络设备包括一个或多个第一可调谐和温度控制（TTC）激光器，一个或多个发射器，每个发射器连接到所述一个或多个TTC激光器之一，一个或多个第二TTC激光器，一个或多个数字信号处理 DSP）转发器（TPND），每个转发器（TPND）连接到所述一个或多个第二TTC激光器之一，一个或多个接收器，以及控制器，用于控制所述一个或多个发射机和所述一个或多个DSP TPND，其中所述一个或多个 发射机对光接入频谱进行碎片整理，并且所述一个或多个DSP TPND利用新可用频谱。 还公开了其他装置，系统和方法。

公开(公告)号：US09055447B2

公开(公告)日：2015-06-09

申请号：US14182479

申请日：2014-02-18

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic

IPC: H04W16/18

CPC classification number: H04W16/18 ,  H04W40/24

Abstract: A method implemented in a network controller used in a mobile backhaul (MBH) network is disclosed. The method includes receiving one or more physical layer parameters from MBH transceivers in the MBH network, computing an admissible set of rate matrices, computing a capacity region based on the admissible set of rate matrices, deciding MBH transmission topology, and transmitting the decision to the MBH transceivers. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在移动回程（MBH）网络中使用的网络控制器中实现的方法。 该方法包括从MBH网络中的MBH收发器接收一个或多个物理层参数，计算速率矩阵的允许集合，基于允许的速率矩阵集计算容量区域，确定MBH传输拓扑，并将决定传送到 MBH收发器。 还公开了其他装置，系统和方法。

公开(公告)号：US20130148963A1

公开(公告)日：2013-06-13

申请号：US13712465

申请日：2012-12-12

Applicant: NEC Laboratories America, Inc.

Inventor： Milorad Cvijetic ,  Ivan B. Djordjevic ,  Neda Cvijetic ,  Ting Wang

IPC: H04J14/04

CPC classification number: H04J14/04 ,  H04B10/2581 ,  H04B10/532 ,  H04B10/548

Abstract: An optical network includes a multidimensional coder and modulator for handling multiple-in-multiple-out MIMO spatial lightpath properties and content of any specific supercarrier, a spatial mode multiplexer responsive to orthogonal frequency division multiplexing OFDM transmissions and the multidimensional coder, a spatial-spectral routing node coupled over a fiber link to the spatial mode multiplexer for performing switching granularity by a spatial mode reconnection, a multidimensional decoder and demodulator; and a spatial mode demultiplexer coupled over a fiber link to the spatial-spectral routing node and responsive to the multidimensional decoder and demodulator.

Abstract translation: 光网络包括用于处理多重多输出MIMO空间光路特性和任何特定超载波的内容的多维编码器和调制器，响应于正交频分复用OFDM传输的空间模式多路复用器和多维编码器，空间光谱 通过光纤链路耦合到空间模式多路复用器的路由节点，用于通过空间模式重新连接来执行交换粒度;多维解码器和解调器; 以及空间模式解复用器，其通过光纤链路耦合到空间光谱路由节点并响应于多维解码器和解调器。

公开(公告)号：US09225421B2

公开(公告)日：2015-12-29

申请号：US14303873

申请日：2014-06-13

Applicant: NEC Laboratories America, Inc.

Inventor： Akihiro Tanaka ,  Neda Cvijetic

IPC: H04J14/02 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548

CPC classification number: H04B10/25073 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/548 ,  H04J14/02

Abstract: Methods and systems for combining signals include modulating data onto a first signal at a first frequency and wavelength; modulating data onto a second signal at a second wavelength using a modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium.

Abstract translation: 用于组合信号的方法和系统包括以第一频率和波长将数据调制到第一信号上; 使用在第一频率产生频谱分量的调制方案将数据调制到第二波长的第二信号上; 使用光学滤波器对第二信号进行滤波以抑制将对第一信号造成干扰的频谱分量; 以及将所述第一信号和所述第二信号组合到传输介质上。

公开(公告)号：US20140369691A1

公开(公告)日：2014-12-18

申请号：US14303873

申请日：2014-06-13

Applicant: NEC Laboratories America, Inc.

Inventor： Akihiro Tanaka ,  Neda Cvijetic

IPC: H04B10/2507 ,  H04J14/02

CPC classification number: H04B10/25073 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/548 ,  H04J14/02

Abstract: Methods and systems for combining signals include modulating data onto a first signal at a first frequency and wavelength; modulating data onto a second signal at a second wavelength using a modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium.

Abstract translation: 用于组合信号的方法和系统包括以第一频率和波长将数据调制到第一信号上; 使用在第一频率产生频谱分量的调制方案将数据调制到第二波长的第二信号上; 使用光学滤波器对第二信号进行滤波以抑制将对第一信号造成干扰的频谱分量; 以及将所述第一信号和所述第二信号组合到传输介质上。

公开(公告)号：US08897648B2

公开(公告)日：2014-11-25

申请号：US13755627

申请日：2013-01-31

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Milorad Cvijetic ,  Ting Wang

IPC: H04J14/00 ,  H04J4/00 ,  H04B10/00 ,  H04J14/02 ,  H04B10/2575

CPC classification number: H04B10/25753 ,  H04B10/25754

Abstract: Systems and methods are provided for network communication using wireless base stations and an optical orthogonal frequency division multiple access (OFDMA) signal generated on an optical wavelength, with the optical OFDMA signal being composed of a plurality of OFDMA subcarriers. A multi-level modulator modulates each of the plurality of OFDMA subcarriers. A single optical wavelength propagates each of the plurality of OFDMA subcarriers to different base stations; a passive optical splitter delivers the optical OFDMA signal to different base stations; and an OFDMA subcarrier de-multiplexer delivers and extracts traffic for each of the base stations in an electronic-domain, wherein the extracted traffic is remodulated in a wireless signal format. Antennas at each of the base stations transmit wireless signals, and the wireless signals are recovered and processed from the base stations.

Abstract translation: 提供了使用无线基站的网络通信和在光波长上生成的光学正交频分多址（OFDMA）信号的系统和方法，其中OFDMA信号由多个OFDMA子载波组成。 多电平调制器调制多个OFDMA子载波中的每一个。 单个光波长将多个OFDMA子载波中的每一个传播到不同的基站; 无源光分路器将光OFDMA信号传送到不同的基站; 并且OFDMA子载波去复用器在电子域中传送和提取每个基站的业务，其中所提取的业务以无线信号格式被重新调制。 每个基站的天线发送无线信号，并且从基站恢复和处理无线信号。

公开(公告)号：US08891964B2

公开(公告)日：2014-11-18

申请号：US13712465

申请日：2012-12-12

Applicant: NEC Laboratories America, Inc.

Inventor： Milorad Cvijetic ,  Ivan B. Djordjevic ,  Neda Cvijetic ,  Ting Wang

IPC: H04J14/00 ,  H04J14/04 ,  H04B10/2581 ,  H04B10/532 ,  H04B10/548

CPC classification number: H04J14/04 ,  H04B10/2581 ,  H04B10/532 ,  H04B10/548

Abstract: An optical network includes a multidimensional coder and modulator for handling multiple-in-multiple-out MIMO spatial lightpath properties and content of any specific supercarrier, a spatial mode multiplexer responsive to orthogonal frequency division multiplexing OFDM transmissions and the multidimensional coder, a spatial-spectral routing node coupled over a fiber link to the spatial mode multiplexer for performing switching granularity by a spatial mode reconnection, a multidimensional decoder and demodulator; and a spatial mode demultiplexer coupled over a fiber link to the spatial-spectral routing node and responsive to the multidimensional decoder and demodulator.

Abstract translation: 光网络包括用于处理多重多输出MIMO空间光路特性和任何特定超载波的内容的多维编码器和调制器，响应于正交频分复用OFDM传输的空间模式多路复用器和多维编码器，空间光谱 通过光纤链路耦合到空间模式多路复用器的路由节点，用于通过空间模式重新连接来执行交换粒度;多维解码器和解调器; 以及空间模式解复用器，其通过光纤链路耦合到空间光谱路由节点并响应于多维解码器和解调器。

公开(公告)号：US20140241717A1

公开(公告)日：2014-08-28

申请号：US14184787

申请日：2014-02-20

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Philip Nan JI ,  Ting Wang ,  Akihiro Tanaka

IPC: H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0067 ,  H04J14/0224 ,  H04J14/0267 ,  H04Q2011/0086

Abstract: A network apparatus used in an optical network is disclosed. The network apparatus includes one or more first tunable and temperature controlled (TTC) lasers, one or more transmitters each of which is connected to one of said one or more TTC lasers, one or more second TTC lasers, one or more digital signal processing (DSP) transponders (TPNDs) each of which is connected to one of said one or more second TTC lasers, one or more receivers, and a controller to control said one or more transmitters and said one or more DSP TPNDs, wherein said one or more transmitters defragment an optical access spectrum, and said one or more DSP TPNDs exploit a newly available spectrum. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在光网络中使用的网络设备。 网络设备包括一个或多个第一可调谐和温度控制（TTC）激光器，一个或多个发射器，每个发射器连接到所述一个或多个TTC激光器之一，一个或多个第二TTC激光器，一个或多个数字信号处理 DSP）转发器（TPND），每个转发器（TPND）连接到所述一个或多个第二TTC激光器之一，一个或多个接收器，以及控制器，用于控制所述一个或多个发射器和所述一个或多个DSP TPND，其中所述一个或多个 发射机对光接入频谱进行碎片整理，并且所述一个或多个DSP TPND利用新可用频谱。 还公开了其他装置，系统和方法。

公开(公告)号：US10116590B2

公开(公告)日：2018-10-30

申请号：US14845078

申请日：2015-09-03

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Konstantinos Kanonakis ,  Ting Wang ,  Jing Wang

IPC: H04L12/911 ,  H04L12/26 ,  H04L29/08

Abstract: A system and method for network virtualization and resource allocation, including storing one or more received network requests in a request table, and updating at least one of a flow table, a waiting list table, or a candidate group map based on the one or more received network requests. The updating includes monitoring a transmission progress of each of one or more flows in a network of interconnected computing devices and moving completed flows from the flow table to a success list, moving requests in the waiting list table which have reached an attempt threshold from the flow table to a fail list, and compiling any residual requests in the waiting list with new requests to generate a new request table. A deterministic request allocation and/or an optimizing request allocation is performed based on the new request table.