公开(公告)号：US20150372758A1

公开(公告)日：2015-12-24

申请号：US14741634

申请日：2015-06-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sil Gu MUN ,  Eun Gu LEE ,  Jyung Chan LEE ,  Sang Soo LEE

IPC: H04B10/40

CPC classification number: H04J14/0245

Abstract: A transmitting and receiving apparatus using a wavelength-tunable filter according to an exemplary embodiment may include: a filter to generate a filtered optical-reception signal by passing only an allowed-to-be-passed wavelength by using Bragg grating filter; a wavelength setter to set the allowed-to-be-passed wavelength of the filter; and a photoelectric converter to perform photoelectric conversion on the filtered optical-reception signal into an electrical signal.

Abstract translation: 根据示例性实施例的使用波长可调滤波器的发送和接收装置可以包括：滤波器，用于通过使用布拉格光栅滤波器仅通过允许传送的波长来产生滤波的光接收信号; 波长设定器，用于设定滤波器的允许通过的波长; 以及光电转换器，对滤波后的光接收信号进行光电转换为电信号。

公开(公告)号：US20150365191A1

公开(公告)日：2015-12-17

申请号：US14740480

申请日：2015-06-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Han Hyub LEE ,  Kwang Ok KIM ,  Kyeong Hwan DOO ,  Sang Soo LEE

IPC: H04J14/02 ,  H04L5/00 ,  H04J14/08

CPC classification number: H04J14/0246 ,  H04J14/025 ,  H04J14/0256 ,  H04J14/0272 ,  H04J14/0282 ,  H04J14/08 ,  H04Q11/0067 ,  H04Q2011/0064

Abstract: A method of tuning a wavelength in a TWDM-PON which has a plurality of operable channels is provided. First, a second channel is added as an operating channel of the TWDM-PON in which at least a first channel is working, and then an OLT that is providing a service to an ONU through the first channel requests the ONU to tune to the second channel. In response to receiving the request, the ONU determines whether a downstream wavelength of the second channel has been recorded thereon. According to the determination result, the ONU sends to the OLT an ACK message that indicates that the ONU is able to perform wavelength tuning and then commences wavelength tuning to the second channel, or the ONU sends to the OLT a NACK message that indicates that the ONU is unable to perform wavelength tuning.

Abstract translation: 提供了一种调整具有多个可操作通道的TWDM-PON中的波长的方法。 首先，添加第二信道作为其中至少第一信道正在工作的TWDM-PON的操作信道，然后通过第一信道向ONU提供业务的OLT请求ONU调谐到第二信道 渠道。 响应于接收到请求，ONU确定第二信道的下行波长是否已被记录在其上。 根据确定结果，ONU向OLT发送指示ONU能够执行波长调谐的ACK消息，然后开始向第二信道进行波长调谐，或者ONU向OLT发送NACK消息，该NACK消息指示 ONU无法进行波长调谐。

公开(公告)号：US20150055955A1

公开(公告)日：2015-02-26

申请号：US14468694

申请日：2014-08-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok KIM ,  Han Hyub LEE ,  Sang Soo LEE

IPC: H04J14/02 ,  H04L7/00 ,  H04B10/60 ,  H04J14/08

CPC classification number: H04J14/0239

Abstract: The invention presents the channel management technology in a Time and Wavelength Division Multiplexing-Passive Optical network (TWDM-PON). According to an exemplary embodiment, the channel management technology is a wavelength management method for an Optical Network Unit (ONU) having a tunable receiver in the TWDM-PON in which a service is provided through multiple channels, the wavelength management method including: setting a wavelength of the tunable receiver as a first channel to receive a physical synchronization signal from an Optical Line Terminal (OLT); extracting either or both service utilization information and service operator information from the physical synchronization signal; and based on either or both of the service utilization information and the service operator information, determining whether to perform follow-up procedures for activation via the first channel or whether to change the wavelength of the tunable receiver into a second channel.

Abstract translation: 本发明提出了时分波分复用无源光网络（TWDM-PON）中的信道管理技术。 根据示例性实施例，信道管理技术是在TWDM-PON中具有可调谐接收机的光网络单元（ONU）的波长管理方法，其中通过多个信道提供业务，所述波长管理方法包括： 作为从光线路终端（OLT）接收物理同步信号的第一信道的可调谐接收机的波长; 从物理同步信号中提取服务使用信息和服务运营商信息中的一个或两个; 并且基于所述服务利用信息和所述服务运营商信息中的一个或两者，确定是否执行经由所述第一信道的激活的后续过程或者是否将所述可调谐接收机的波长改变为第二信道。

公开(公告)号：US20140376605A1

公开(公告)日：2014-12-25

申请号：US14314440

申请日：2014-06-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Hwan KIM ,  Eui Suk JUNG ,  Sang Soo LEE ,  Yong Yuk WON ,  Sang Min YOON

IPC: H03M7/30

CPC classification number: H03M7/3062 ,  H03M7/30

Abstract: Disclosed are methods and apparatuses for compressing and decompressing data at a sample rate lower than a Nyquist sampling rate for the data. The data compression apparatus comprises a domain converting part performing a domain conversion on input data to generate domain-converted input data, and a data compression part generating compressed data by down-sampling the domain-converted input data at a sampling rate lower than a Nyquist sampling rate. Therefore, data to be transmitted can be compressed in a transmitting end by sampling the data at a sampling rate lower than a Nyquist sampling rate, and then the data can be reproduced in a receiving end. Therefore, a higher compression ratio can be achieved as compared with that of conventional technologies.

Abstract translation: 公开了用于以低于数据的奈奎斯特采样率的采样率对数据进行压缩和解压缩的方法和装置。 数据压缩装置包括对输入数据执行域转换以产生域转换的输入数据的域转换部分，以及数据压缩部分，通过以低于奈奎斯特的采样率对域转换的输入数据进行下采样来生成压缩数据 采样率。 因此，可以在发送端通过以低于奈奎斯特采样率的采样率对数据进行采样来压缩要发送的数据，然后可以在接收端再现数据。 因此，与传统技术相比，可以获得更高的压缩比。

公开(公告)号：US20140205282A1

公开(公告)日：2014-07-24

申请号：US14158487

申请日：2014-01-17

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE ,  Electronics and Telecommunications Research Institute

Inventor： Seung Il MYONG ,  Jyung Chan LEE ,  Won Kyoung LEE ,  Sang Soo LEE ,  Jun Ho LEE

IPC: H04B10/40 ,  H04B10/071

CPC classification number: H04B10/40 ,  G02B6/4246 ,  H04B10/071 ,  H04B10/272 ,  H04Q11/0067 ,  H04Q2011/0083

Abstract: An optical transceiver and an optical network system for performing a data communication and monitoring an optical link are disclosed. The optical transceiver may simultaneously perform the data communication and monitor the optical link, and a wavelength of an optical signal for the data communication and a wavelength of an optical signal for monitoring the optical link may be differently set.

Abstract translation: 公开了一种用于执行数据通信和监视光链路的光收发器和光网络系统。 光收发器可以同时执行数据通信并监视光链路，并且可以不同地设置用于数据通信的光信号的波长和用于监视光链路的光信号的波长的波长。

公开(公告)号：US20130170834A1

公开(公告)日：2013-07-04

申请号：US13728089

申请日：2012-12-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung-Hyun CHO ,  Jie Hyun LEE ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE ,  Eui Suk JUNG ,  Kwang Ok KIM

IPC: H04J14/02

CPC classification number: H04J14/0278 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298 ,  H04J2014/0253

Abstract: Provided is a hybrid passive optical network (PON) system. The hybrid PON system of wavelength division multiplexing (WDM)/time division multiplexing (TDM) may include an optical line terminal (OLT) and an optical network unit (ONU). The OLT and the ONU may transmit a signal based on wavelength reuse using a seed light source and a reflective modulator. The light source may include a seed light source having a single wavelength, two seed light sources having different wavelength bands, and a light source having a wavelength tunable characteristic.

Abstract translation: 提供了一种混合无源光网络（PON）系统。 波分复用（WDM）/时分复用（TDM）的混合PON系统可以包括光线路终端（OLT）和光网络单元（ONU）。 OLT和ONU可以使用种子光源和反射调制器来发射基于波长重用的信号。 光源可以包括具有单个波长的种子光源，具有不同波长带的两个种子光源和具有波长可调特性的光源。